| /* POWER/PowerPC XCOFF linker support. |
| Copyright 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc. |
| Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "bfdlink.h" |
| #include "libbfd.h" |
| #include "coff/internal.h" |
| #include "libcoff.h" |
| |
| /* This file holds the XCOFF linker code. */ |
| |
| #define STRING_SIZE_SIZE (4) |
| |
| /* In order to support linking different object file formats into an |
| XCOFF format, we need to be able to determine whether a particular |
| bfd_target is an XCOFF vector. FIXME: We need to rethink this |
| whole approach. */ |
| #define XCOFF_XVECP(xv) \ |
| (strcmp ((xv)->name, "aixcoff-rs6000") == 0 \ |
| || strcmp ((xv)->name, "xcoff-powermac") == 0) |
| |
| /* Get the XCOFF hash table entries for a BFD. */ |
| #define obj_xcoff_sym_hashes(bfd) \ |
| ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd)) |
| |
| /* XCOFF relocation types. These probably belong in a header file |
| somewhere. The relocations are described in the function |
| _bfd_ppc_xcoff_relocate_section in this file. */ |
| |
| #define R_POS (0x00) |
| #define R_NEG (0x01) |
| #define R_REL (0x02) |
| #define R_TOC (0x03) |
| #define R_RTB (0x04) |
| #define R_GL (0x05) |
| #define R_TCL (0x06) |
| #define R_BA (0x08) |
| #define R_BR (0x0a) |
| #define R_RL (0x0c) |
| #define R_RLA (0x0d) |
| #define R_REF (0x0f) |
| #define R_TRL (0x12) |
| #define R_TRLA (0x13) |
| #define R_RRTBI (0x14) |
| #define R_RRTBA (0x15) |
| #define R_CAI (0x16) |
| #define R_CREL (0x17) |
| #define R_RBA (0x18) |
| #define R_RBAC (0x19) |
| #define R_RBR (0x1a) |
| #define R_RBRC (0x1b) |
| |
| /* The first word of global linkage code. This must be modified by |
| filling in the correct TOC offset. */ |
| |
| #define XCOFF_GLINK_FIRST (0x81820000) /* lwz r12,0(r2) */ |
| |
| /* The remaining words of global linkage code. */ |
| |
| static unsigned long xcoff_glink_code[] = |
| { |
| 0x90410014, /* stw r2,20(r1) */ |
| 0x800c0000, /* lwz r0,0(r12) */ |
| 0x804c0004, /* lwz r2,4(r12) */ |
| 0x7c0903a6, /* mtctr r0 */ |
| 0x4e800420, /* bctr */ |
| 0x0, /* start of traceback table */ |
| 0x000c8000, /* traceback table */ |
| 0x0 /* traceback table */ |
| }; |
| |
| #define XCOFF_GLINK_SIZE \ |
| (((sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]) * 4) + 4) |
| |
| /* We reuse the SEC_ROM flag as a mark flag for garbage collection. |
| This flag will only be used on input sections. */ |
| |
| #define SEC_MARK (SEC_ROM) |
| |
| /* The ldhdr structure. This appears at the start of the .loader |
| section. */ |
| |
| struct internal_ldhdr |
| { |
| /* The version number: currently always 1. */ |
| unsigned long l_version; |
| /* The number of symbol table entries. */ |
| bfd_size_type l_nsyms; |
| /* The number of relocation table entries. */ |
| bfd_size_type l_nreloc; |
| /* The length of the import file string table. */ |
| bfd_size_type l_istlen; |
| /* The number of import files. */ |
| bfd_size_type l_nimpid; |
| /* The offset from the start of the .loader section to the first |
| entry in the import file table. */ |
| bfd_size_type l_impoff; |
| /* The length of the string table. */ |
| bfd_size_type l_stlen; |
| /* The offset from the start of the .loader section to the first |
| entry in the string table. */ |
| bfd_size_type l_stoff; |
| }; |
| |
| struct external_ldhdr |
| { |
| bfd_byte l_version[4]; |
| bfd_byte l_nsyms[4]; |
| bfd_byte l_nreloc[4]; |
| bfd_byte l_istlen[4]; |
| bfd_byte l_nimpid[4]; |
| bfd_byte l_impoff[4]; |
| bfd_byte l_stlen[4]; |
| bfd_byte l_stoff[4]; |
| }; |
| |
| #define LDHDRSZ (8 * 4) |
| |
| /* The ldsym structure. This is used to represent a symbol in the |
| .loader section. */ |
| |
| struct internal_ldsym |
| { |
| union |
| { |
| /* The symbol name if <= SYMNMLEN characters. */ |
| char _l_name[SYMNMLEN]; |
| struct |
| { |
| /* Zero if the symbol name is more than SYMNMLEN characters. */ |
| long _l_zeroes; |
| /* The offset in the string table if the symbol name is more |
| than SYMNMLEN characters. */ |
| long _l_offset; |
| } _l_l; |
| } _l; |
| /* The symbol value. */ |
| bfd_vma l_value; |
| /* The symbol section number. */ |
| short l_scnum; |
| /* The symbol type and flags. */ |
| char l_smtype; |
| /* The symbol storage class. */ |
| char l_smclas; |
| /* The import file ID. */ |
| bfd_size_type l_ifile; |
| /* Offset to the parameter type check string. */ |
| bfd_size_type l_parm; |
| }; |
| |
| struct external_ldsym |
| { |
| union |
| { |
| bfd_byte _l_name[SYMNMLEN]; |
| struct |
| { |
| bfd_byte _l_zeroes[4]; |
| bfd_byte _l_offset[4]; |
| } _l_l; |
| } _l; |
| bfd_byte l_value[4]; |
| bfd_byte l_scnum[2]; |
| bfd_byte l_smtype[1]; |
| bfd_byte l_smclas[1]; |
| bfd_byte l_ifile[4]; |
| bfd_byte l_parm[4]; |
| }; |
| |
| #define LDSYMSZ (8 + 3 * 4 + 2 + 2) |
| |
| /* These flags are for the l_smtype field (the lower three bits are an |
| XTY_* value). */ |
| |
| /* Imported symbol. */ |
| #define L_IMPORT (0x40) |
| /* Entry point. */ |
| #define L_ENTRY (0x20) |
| /* Exported symbol. */ |
| #define L_EXPORT (0x10) |
| |
| /* The ldrel structure. This is used to represent a reloc in the |
| .loader section. */ |
| |
| struct internal_ldrel |
| { |
| /* The reloc address. */ |
| bfd_vma l_vaddr; |
| /* The symbol table index in the .loader section symbol table. */ |
| bfd_size_type l_symndx; |
| /* The relocation type and size. */ |
| short l_rtype; |
| /* The section number this relocation applies to. */ |
| short l_rsecnm; |
| }; |
| |
| struct external_ldrel |
| { |
| bfd_byte l_vaddr[4]; |
| bfd_byte l_symndx[4]; |
| bfd_byte l_rtype[2]; |
| bfd_byte l_rsecnm[2]; |
| }; |
| |
| #define LDRELSZ (2 * 4 + 2 * 2) |
| |
| /* The list of import files. */ |
| |
| struct xcoff_import_file |
| { |
| /* The next entry in the list. */ |
| struct xcoff_import_file *next; |
| /* The path. */ |
| const char *path; |
| /* The file name. */ |
| const char *file; |
| /* The member name. */ |
| const char *member; |
| }; |
| |
| /* An entry in the XCOFF linker hash table. */ |
| |
| struct xcoff_link_hash_entry |
| { |
| struct bfd_link_hash_entry root; |
| |
| /* Symbol index in output file. Set to -1 initially. Set to -2 if |
| there is a reloc against this symbol. */ |
| long indx; |
| |
| /* If we have created a TOC entry for this symbol, this is the .tc |
| section which holds it. */ |
| asection *toc_section; |
| |
| union |
| { |
| /* If we have created a TOC entry (the XCOFF_SET_TOC flag is |
| set), this is the offset in toc_section. */ |
| bfd_vma toc_offset; |
| /* If the TOC entry comes from an input file, this is set to the |
| symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol. */ |
| long toc_indx; |
| } u; |
| |
| /* If this symbol is a function entry point which is called, this |
| field holds a pointer to the function descriptor. If this symbol |
| is a function descriptor, this field holds a pointer to the |
| function entry point. */ |
| struct xcoff_link_hash_entry *descriptor; |
| |
| /* The .loader symbol table entry, if there is one. */ |
| struct internal_ldsym *ldsym; |
| |
| /* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table |
| index. If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set, |
| this is the l_ifile value. */ |
| long ldindx; |
| |
| /* Some linker flags. */ |
| unsigned short flags; |
| /* Symbol is referenced by a regular object. */ |
| #define XCOFF_REF_REGULAR (01) |
| /* Symbol is defined by a regular object. */ |
| #define XCOFF_DEF_REGULAR (02) |
| /* Symbol is defined by a dynamic object. */ |
| #define XCOFF_DEF_DYNAMIC (04) |
| /* Symbol is used in a reloc being copied into the .loader section. */ |
| #define XCOFF_LDREL (010) |
| /* Symbol is the entry point. */ |
| #define XCOFF_ENTRY (020) |
| /* Symbol is called; this is, it appears in a R_BR reloc. */ |
| #define XCOFF_CALLED (040) |
| /* Symbol needs the TOC entry filled in. */ |
| #define XCOFF_SET_TOC (0100) |
| /* Symbol is explicitly imported. */ |
| #define XCOFF_IMPORT (0200) |
| /* Symbol is explicitly exported. */ |
| #define XCOFF_EXPORT (0400) |
| /* Symbol has been processed by xcoff_build_ldsyms. */ |
| #define XCOFF_BUILT_LDSYM (01000) |
| /* Symbol is mentioned by a section which was not garbage collected. */ |
| #define XCOFF_MARK (02000) |
| /* Symbol size is recorded in size_list list from hash table. */ |
| #define XCOFF_HAS_SIZE (04000) |
| /* Symbol is a function descriptor. */ |
| #define XCOFF_DESCRIPTOR (010000) |
| /* Multiple definitions have been for the symbol. */ |
| #define XCOFF_MULTIPLY_DEFINED (020000) |
| |
| /* The storage mapping class. */ |
| unsigned char smclas; |
| }; |
| |
| /* The XCOFF linker hash table. */ |
| |
| struct xcoff_link_hash_table |
| { |
| struct bfd_link_hash_table root; |
| |
| /* The .debug string hash table. We need to compute this while |
| reading the input files, so that we know how large the .debug |
| section will be before we assign section positions. */ |
| struct bfd_strtab_hash *debug_strtab; |
| |
| /* The .debug section we will use for the final output. */ |
| asection *debug_section; |
| |
| /* The .loader section we will use for the final output. */ |
| asection *loader_section; |
| |
| /* A count of non TOC relative relocs which will need to be |
| allocated in the .loader section. */ |
| size_t ldrel_count; |
| |
| /* The .loader section header. */ |
| struct internal_ldhdr ldhdr; |
| |
| /* The .gl section we use to hold global linkage code. */ |
| asection *linkage_section; |
| |
| /* The .tc section we use to hold toc entries we build for global |
| linkage code. */ |
| asection *toc_section; |
| |
| /* The .ds section we use to hold function descriptors which we |
| create for exported symbols. */ |
| asection *descriptor_section; |
| |
| /* The list of import files. */ |
| struct xcoff_import_file *imports; |
| |
| /* Required alignment of sections within the output file. */ |
| unsigned long file_align; |
| |
| /* Whether the .text section must be read-only. */ |
| boolean textro; |
| |
| /* Whether garbage collection was done. */ |
| boolean gc; |
| |
| /* A linked list of symbols for which we have size information. */ |
| struct xcoff_link_size_list |
| { |
| struct xcoff_link_size_list *next; |
| struct xcoff_link_hash_entry *h; |
| bfd_size_type size; |
| } *size_list; |
| |
| /* Magic sections: _text, _etext, _data, _edata, _end, end. */ |
| asection *special_sections[6]; |
| }; |
| |
| /* Information we keep for each section in the output file during the |
| final link phase. */ |
| |
| struct xcoff_link_section_info |
| { |
| /* The relocs to be output. */ |
| struct internal_reloc *relocs; |
| /* For each reloc against a global symbol whose index was not known |
| when the reloc was handled, the global hash table entry. */ |
| struct xcoff_link_hash_entry **rel_hashes; |
| /* If there is a TOC relative reloc against a global symbol, and the |
| index of the TOC symbol is not known when the reloc was handled, |
| an entry is added to this linked list. This is not an array, |
| like rel_hashes, because this case is quite uncommon. */ |
| struct xcoff_toc_rel_hash |
| { |
| struct xcoff_toc_rel_hash *next; |
| struct xcoff_link_hash_entry *h; |
| struct internal_reloc *rel; |
| } *toc_rel_hashes; |
| }; |
| |
| /* Information that we pass around while doing the final link step. */ |
| |
| struct xcoff_final_link_info |
| { |
| /* General link information. */ |
| struct bfd_link_info *info; |
| /* Output BFD. */ |
| bfd *output_bfd; |
| /* Hash table for long symbol names. */ |
| struct bfd_strtab_hash *strtab; |
| /* Array of information kept for each output section, indexed by the |
| target_index field. */ |
| struct xcoff_link_section_info *section_info; |
| /* Symbol index of last C_FILE symbol (-1 if none). */ |
| long last_file_index; |
| /* Contents of last C_FILE symbol. */ |
| struct internal_syment last_file; |
| /* Symbol index of TOC symbol. */ |
| long toc_symindx; |
| /* Start of .loader symbols. */ |
| struct external_ldsym *ldsym; |
| /* Next .loader reloc to swap out. */ |
| struct external_ldrel *ldrel; |
| /* File position of start of line numbers. */ |
| file_ptr line_filepos; |
| /* Buffer large enough to hold swapped symbols of any input file. */ |
| struct internal_syment *internal_syms; |
| /* Buffer large enough to hold output indices of symbols of any |
| input file. */ |
| long *sym_indices; |
| /* Buffer large enough to hold output symbols for any input file. */ |
| bfd_byte *outsyms; |
| /* Buffer large enough to hold external line numbers for any input |
| section. */ |
| bfd_byte *linenos; |
| /* Buffer large enough to hold any input section. */ |
| bfd_byte *contents; |
| /* Buffer large enough to hold external relocs of any input section. */ |
| bfd_byte *external_relocs; |
| }; |
| |
| static void xcoff_swap_ldhdr_in |
| PARAMS ((bfd *, const struct external_ldhdr *, struct internal_ldhdr *)); |
| static void xcoff_swap_ldhdr_out |
| PARAMS ((bfd *, const struct internal_ldhdr *, struct external_ldhdr *)); |
| static void xcoff_swap_ldsym_in |
| PARAMS ((bfd *, const struct external_ldsym *, struct internal_ldsym *)); |
| static void xcoff_swap_ldsym_out |
| PARAMS ((bfd *, const struct internal_ldsym *, struct external_ldsym *)); |
| static void xcoff_swap_ldrel_in |
| PARAMS ((bfd *, const struct external_ldrel *, struct internal_ldrel *)); |
| static void xcoff_swap_ldrel_out |
| PARAMS ((bfd *, const struct internal_ldrel *, struct external_ldrel *)); |
| static struct bfd_hash_entry *xcoff_link_hash_newfunc |
| PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| static boolean xcoff_get_section_contents PARAMS ((bfd *, asection *)); |
| static struct internal_reloc *xcoff_read_internal_relocs |
| PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean, |
| struct internal_reloc *)); |
| static boolean xcoff_link_add_object_symbols |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static boolean xcoff_link_check_archive_element |
| PARAMS ((bfd *, struct bfd_link_info *, boolean *)); |
| static boolean xcoff_link_check_ar_symbols |
| PARAMS ((bfd *, struct bfd_link_info *, boolean *)); |
| static boolean xcoff_link_check_dynamic_ar_symbols |
| PARAMS ((bfd *, struct bfd_link_info *, boolean *)); |
| static bfd_size_type xcoff_find_reloc |
| PARAMS ((struct internal_reloc *, bfd_size_type, bfd_vma)); |
| static boolean xcoff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *)); |
| static boolean xcoff_link_add_dynamic_symbols |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static boolean xcoff_mark_symbol |
| PARAMS ((struct bfd_link_info *, struct xcoff_link_hash_entry *)); |
| static boolean xcoff_mark PARAMS ((struct bfd_link_info *, asection *)); |
| static void xcoff_sweep PARAMS ((struct bfd_link_info *)); |
| static boolean xcoff_build_ldsyms |
| PARAMS ((struct xcoff_link_hash_entry *, PTR)); |
| static boolean xcoff_link_input_bfd |
| PARAMS ((struct xcoff_final_link_info *, bfd *)); |
| static boolean xcoff_write_global_symbol |
| PARAMS ((struct xcoff_link_hash_entry *, PTR)); |
| static boolean xcoff_reloc_link_order |
| PARAMS ((bfd *, struct xcoff_final_link_info *, asection *, |
| struct bfd_link_order *)); |
| static int xcoff_sort_relocs PARAMS ((const PTR, const PTR)); |
| |
| /* Routines to swap information in the XCOFF .loader section. If we |
| ever need to write an XCOFF loader, this stuff will need to be |
| moved to another file shared by the linker (which XCOFF calls the |
| ``binder'') and the loader. */ |
| |
| /* Swap in the ldhdr structure. */ |
| |
| static void |
| xcoff_swap_ldhdr_in (abfd, src, dst) |
| bfd *abfd; |
| const struct external_ldhdr *src; |
| struct internal_ldhdr *dst; |
| { |
| dst->l_version = bfd_get_32 (abfd, src->l_version); |
| dst->l_nsyms = bfd_get_32 (abfd, src->l_nsyms); |
| dst->l_nreloc = bfd_get_32 (abfd, src->l_nreloc); |
| dst->l_istlen = bfd_get_32 (abfd, src->l_istlen); |
| dst->l_nimpid = bfd_get_32 (abfd, src->l_nimpid); |
| dst->l_impoff = bfd_get_32 (abfd, src->l_impoff); |
| dst->l_stlen = bfd_get_32 (abfd, src->l_stlen); |
| dst->l_stoff = bfd_get_32 (abfd, src->l_stoff); |
| } |
| |
| /* Swap out the ldhdr structure. */ |
| |
| static void |
| xcoff_swap_ldhdr_out (abfd, src, dst) |
| bfd *abfd; |
| const struct internal_ldhdr *src; |
| struct external_ldhdr *dst; |
| { |
| bfd_put_32 (abfd, src->l_version, dst->l_version); |
| bfd_put_32 (abfd, src->l_nsyms, dst->l_nsyms); |
| bfd_put_32 (abfd, src->l_nreloc, dst->l_nreloc); |
| bfd_put_32 (abfd, src->l_istlen, dst->l_istlen); |
| bfd_put_32 (abfd, src->l_nimpid, dst->l_nimpid); |
| bfd_put_32 (abfd, src->l_impoff, dst->l_impoff); |
| bfd_put_32 (abfd, src->l_stlen, dst->l_stlen); |
| bfd_put_32 (abfd, src->l_stoff, dst->l_stoff); |
| } |
| |
| /* Swap in the ldsym structure. */ |
| |
| static void |
| xcoff_swap_ldsym_in (abfd, src, dst) |
| bfd *abfd; |
| const struct external_ldsym *src; |
| struct internal_ldsym *dst; |
| { |
| if (bfd_get_32 (abfd, src->_l._l_l._l_zeroes) != 0) |
| memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN); |
| else |
| { |
| dst->_l._l_l._l_zeroes = 0; |
| dst->_l._l_l._l_offset = bfd_get_32 (abfd, src->_l._l_l._l_offset); |
| } |
| dst->l_value = bfd_get_32 (abfd, src->l_value); |
| dst->l_scnum = bfd_get_16 (abfd, src->l_scnum); |
| dst->l_smtype = bfd_get_8 (abfd, src->l_smtype); |
| dst->l_smclas = bfd_get_8 (abfd, src->l_smclas); |
| dst->l_ifile = bfd_get_32 (abfd, src->l_ifile); |
| dst->l_parm = bfd_get_32 (abfd, src->l_parm); |
| } |
| |
| /* Swap out the ldsym structure. */ |
| |
| static void |
| xcoff_swap_ldsym_out (abfd, src, dst) |
| bfd *abfd; |
| const struct internal_ldsym *src; |
| struct external_ldsym *dst; |
| { |
| if (src->_l._l_l._l_zeroes != 0) |
| memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN); |
| else |
| { |
| bfd_put_32 (abfd, 0, dst->_l._l_l._l_zeroes); |
| bfd_put_32 (abfd, src->_l._l_l._l_offset, dst->_l._l_l._l_offset); |
| } |
| bfd_put_32 (abfd, src->l_value, dst->l_value); |
| bfd_put_16 (abfd, src->l_scnum, dst->l_scnum); |
| bfd_put_8 (abfd, src->l_smtype, dst->l_smtype); |
| bfd_put_8 (abfd, src->l_smclas, dst->l_smclas); |
| bfd_put_32 (abfd, src->l_ifile, dst->l_ifile); |
| bfd_put_32 (abfd, src->l_parm, dst->l_parm); |
| } |
| |
| /* Swap in the ldrel structure. */ |
| |
| static void |
| xcoff_swap_ldrel_in (abfd, src, dst) |
| bfd *abfd; |
| const struct external_ldrel *src; |
| struct internal_ldrel *dst; |
| { |
| dst->l_vaddr = bfd_get_32 (abfd, src->l_vaddr); |
| dst->l_symndx = bfd_get_32 (abfd, src->l_symndx); |
| dst->l_rtype = bfd_get_16 (abfd, src->l_rtype); |
| dst->l_rsecnm = bfd_get_16 (abfd, src->l_rsecnm); |
| } |
| |
| /* Swap out the ldrel structure. */ |
| |
| static void |
| xcoff_swap_ldrel_out (abfd, src, dst) |
| bfd *abfd; |
| const struct internal_ldrel *src; |
| struct external_ldrel *dst; |
| { |
| bfd_put_32 (abfd, src->l_vaddr, dst->l_vaddr); |
| bfd_put_32 (abfd, src->l_symndx, dst->l_symndx); |
| bfd_put_16 (abfd, src->l_rtype, dst->l_rtype); |
| bfd_put_16 (abfd, src->l_rsecnm, dst->l_rsecnm); |
| } |
| |
| /* Routines to read XCOFF dynamic information. This don't really |
| belong here, but we already have the ldsym manipulation routines |
| here. */ |
| |
| /* Read the contents of a section. */ |
| |
| static boolean |
| xcoff_get_section_contents (abfd, sec) |
| bfd *abfd; |
| asection *sec; |
| { |
| if (coff_section_data (abfd, sec) == NULL) |
| { |
| sec->used_by_bfd = bfd_zalloc (abfd, |
| sizeof (struct coff_section_tdata)); |
| if (sec->used_by_bfd == NULL) |
| return false; |
| } |
| |
| if (coff_section_data (abfd, sec)->contents == NULL) |
| { |
| coff_section_data (abfd, sec)->contents = |
| (bfd_byte *) bfd_malloc (sec->_raw_size); |
| if (coff_section_data (abfd, sec)->contents == NULL) |
| return false; |
| |
| if (! bfd_get_section_contents (abfd, sec, |
| coff_section_data (abfd, sec)->contents, |
| (file_ptr) 0, sec->_raw_size)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* Get the size required to hold the dynamic symbols. */ |
| |
| long |
| _bfd_xcoff_get_dynamic_symtab_upper_bound (abfd) |
| bfd *abfd; |
| { |
| asection *lsec; |
| bfd_byte *contents; |
| struct internal_ldhdr ldhdr; |
| |
| if ((abfd->flags & DYNAMIC) == 0) |
| { |
| bfd_set_error (bfd_error_invalid_operation); |
| return -1; |
| } |
| |
| lsec = bfd_get_section_by_name (abfd, ".loader"); |
| if (lsec == NULL) |
| { |
| bfd_set_error (bfd_error_no_symbols); |
| return -1; |
| } |
| |
| if (! xcoff_get_section_contents (abfd, lsec)) |
| return -1; |
| contents = coff_section_data (abfd, lsec)->contents; |
| |
| xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); |
| |
| return (ldhdr.l_nsyms + 1) * sizeof (asymbol *); |
| } |
| |
| /* Get the dynamic symbols. */ |
| |
| long |
| _bfd_xcoff_canonicalize_dynamic_symtab (abfd, psyms) |
| bfd *abfd; |
| asymbol **psyms; |
| { |
| asection *lsec; |
| bfd_byte *contents; |
| struct internal_ldhdr ldhdr; |
| const char *strings; |
| struct external_ldsym *elsym, *elsymend; |
| coff_symbol_type *symbuf; |
| |
| if ((abfd->flags & DYNAMIC) == 0) |
| { |
| bfd_set_error (bfd_error_invalid_operation); |
| return -1; |
| } |
| |
| lsec = bfd_get_section_by_name (abfd, ".loader"); |
| if (lsec == NULL) |
| { |
| bfd_set_error (bfd_error_no_symbols); |
| return -1; |
| } |
| |
| if (! xcoff_get_section_contents (abfd, lsec)) |
| return -1; |
| contents = coff_section_data (abfd, lsec)->contents; |
| |
| coff_section_data (abfd, lsec)->keep_contents = true; |
| |
| xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); |
| |
| strings = (char *) contents + ldhdr.l_stoff; |
| |
| symbuf = ((coff_symbol_type *) |
| bfd_zalloc (abfd, ldhdr.l_nsyms * sizeof (coff_symbol_type))); |
| if (symbuf == NULL) |
| return -1; |
| |
| elsym = (struct external_ldsym *) (contents + LDHDRSZ); |
| elsymend = elsym + ldhdr.l_nsyms; |
| for (; elsym < elsymend; elsym++, symbuf++, psyms++) |
| { |
| struct internal_ldsym ldsym; |
| |
| xcoff_swap_ldsym_in (abfd, elsym, &ldsym); |
| |
| symbuf->symbol.the_bfd = abfd; |
| |
| if (ldsym._l._l_l._l_zeroes == 0) |
| symbuf->symbol.name = strings + ldsym._l._l_l._l_offset; |
| else |
| { |
| int i; |
| |
| for (i = 0; i < SYMNMLEN; i++) |
| if (ldsym._l._l_name[i] == '\0') |
| break; |
| if (i < SYMNMLEN) |
| symbuf->symbol.name = (char *) elsym->_l._l_name; |
| else |
| { |
| char *c; |
| |
| c = bfd_alloc (abfd, SYMNMLEN + 1); |
| if (c == NULL) |
| return -1; |
| memcpy (c, ldsym._l._l_name, SYMNMLEN); |
| c[SYMNMLEN] = '\0'; |
| symbuf->symbol.name = c; |
| } |
| } |
| |
| if (ldsym.l_smclas == XMC_XO) |
| symbuf->symbol.section = bfd_abs_section_ptr; |
| else |
| symbuf->symbol.section = coff_section_from_bfd_index (abfd, |
| ldsym.l_scnum); |
| symbuf->symbol.value = ldsym.l_value - symbuf->symbol.section->vma; |
| |
| symbuf->symbol.flags = BSF_NO_FLAGS; |
| if ((ldsym.l_smtype & L_EXPORT) != 0) |
| symbuf->symbol.flags |= BSF_GLOBAL; |
| |
| /* FIXME: We have no way to record the other information stored |
| with the loader symbol. */ |
| |
| *psyms = (asymbol *) symbuf; |
| } |
| |
| *psyms = NULL; |
| |
| return ldhdr.l_nsyms; |
| } |
| |
| /* Get the size required to hold the dynamic relocs. */ |
| |
| long |
| _bfd_xcoff_get_dynamic_reloc_upper_bound (abfd) |
| bfd *abfd; |
| { |
| asection *lsec; |
| bfd_byte *contents; |
| struct internal_ldhdr ldhdr; |
| |
| if ((abfd->flags & DYNAMIC) == 0) |
| { |
| bfd_set_error (bfd_error_invalid_operation); |
| return -1; |
| } |
| |
| lsec = bfd_get_section_by_name (abfd, ".loader"); |
| if (lsec == NULL) |
| { |
| bfd_set_error (bfd_error_no_symbols); |
| return -1; |
| } |
| |
| if (! xcoff_get_section_contents (abfd, lsec)) |
| return -1; |
| contents = coff_section_data (abfd, lsec)->contents; |
| |
| xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); |
| |
| return (ldhdr.l_nreloc + 1) * sizeof (arelent *); |
| } |
| |
| /* The typical dynamic reloc. */ |
| |
| static reloc_howto_type xcoff_dynamic_reloc = |
| HOWTO (0, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "R_POS", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false); /* pcrel_offset */ |
| |
| /* Get the dynamic relocs. */ |
| |
| long |
| _bfd_xcoff_canonicalize_dynamic_reloc (abfd, prelocs, syms) |
| bfd *abfd; |
| arelent **prelocs; |
| asymbol **syms; |
| { |
| asection *lsec; |
| bfd_byte *contents; |
| struct internal_ldhdr ldhdr; |
| arelent *relbuf; |
| struct external_ldrel *elrel, *elrelend; |
| |
| if ((abfd->flags & DYNAMIC) == 0) |
| { |
| bfd_set_error (bfd_error_invalid_operation); |
| return -1; |
| } |
| |
| lsec = bfd_get_section_by_name (abfd, ".loader"); |
| if (lsec == NULL) |
| { |
| bfd_set_error (bfd_error_no_symbols); |
| return -1; |
| } |
| |
| if (! xcoff_get_section_contents (abfd, lsec)) |
| return -1; |
| contents = coff_section_data (abfd, lsec)->contents; |
| |
| xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr); |
| |
| relbuf = (arelent *) bfd_alloc (abfd, ldhdr.l_nreloc * sizeof (arelent)); |
| if (relbuf == NULL) |
| return -1; |
| |
| elrel = ((struct external_ldrel *) |
| (contents + LDHDRSZ + ldhdr.l_nsyms * LDSYMSZ)); |
| elrelend = elrel + ldhdr.l_nreloc; |
| for (; elrel < elrelend; elrel++, relbuf++, prelocs++) |
| { |
| struct internal_ldrel ldrel; |
| |
| xcoff_swap_ldrel_in (abfd, elrel, &ldrel); |
| |
| if (ldrel.l_symndx >= 3) |
| relbuf->sym_ptr_ptr = syms + (ldrel.l_symndx - 3); |
| else |
| { |
| const char *name; |
| asection *sec; |
| |
| switch (ldrel.l_symndx) |
| { |
| case 0: |
| name = ".text"; |
| break; |
| case 1: |
| name = ".data"; |
| break; |
| case 2: |
| name = ".bss"; |
| break; |
| default: |
| abort (); |
| break; |
| } |
| |
| sec = bfd_get_section_by_name (abfd, name); |
| if (sec == NULL) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return -1; |
| } |
| |
| relbuf->sym_ptr_ptr = sec->symbol_ptr_ptr; |
| } |
| |
| relbuf->address = ldrel.l_vaddr; |
| relbuf->addend = 0; |
| |
| /* Most dynamic relocs have the same type. FIXME: This is only |
| correct if ldrel.l_rtype == 0. In other cases, we should use |
| a different howto. */ |
| relbuf->howto = &xcoff_dynamic_reloc; |
| |
| /* FIXME: We have no way to record the l_rsecnm field. */ |
| |
| *prelocs = relbuf; |
| } |
| |
| *prelocs = NULL; |
| |
| return ldhdr.l_nreloc; |
| } |
| |
| /* Routine to create an entry in an XCOFF link hash table. */ |
| |
| static struct bfd_hash_entry * |
| xcoff_link_hash_newfunc (entry, table, string) |
| struct bfd_hash_entry *entry; |
| struct bfd_hash_table *table; |
| const char *string; |
| { |
| struct xcoff_link_hash_entry *ret = (struct xcoff_link_hash_entry *) entry; |
| |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (ret == (struct xcoff_link_hash_entry *) NULL) |
| ret = ((struct xcoff_link_hash_entry *) |
| bfd_hash_allocate (table, sizeof (struct xcoff_link_hash_entry))); |
| if (ret == (struct xcoff_link_hash_entry *) NULL) |
| return (struct bfd_hash_entry *) ret; |
| |
| /* Call the allocation method of the superclass. */ |
| ret = ((struct xcoff_link_hash_entry *) |
| _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| table, string)); |
| if (ret != NULL) |
| { |
| /* Set local fields. */ |
| ret->indx = -1; |
| ret->toc_section = NULL; |
| ret->u.toc_indx = -1; |
| ret->descriptor = NULL; |
| ret->ldsym = NULL; |
| ret->ldindx = -1; |
| ret->flags = 0; |
| ret->smclas = XMC_UA; |
| } |
| |
| return (struct bfd_hash_entry *) ret; |
| } |
| |
| /* Create a XCOFF link hash table. */ |
| |
| struct bfd_link_hash_table * |
| _bfd_xcoff_bfd_link_hash_table_create (abfd) |
| bfd *abfd; |
| { |
| struct xcoff_link_hash_table *ret; |
| |
| ret = ((struct xcoff_link_hash_table *) |
| bfd_alloc (abfd, sizeof (struct xcoff_link_hash_table))); |
| if (ret == (struct xcoff_link_hash_table *) NULL) |
| return (struct bfd_link_hash_table *) NULL; |
| if (! _bfd_link_hash_table_init (&ret->root, abfd, xcoff_link_hash_newfunc)) |
| { |
| bfd_release (abfd, ret); |
| return (struct bfd_link_hash_table *) NULL; |
| } |
| |
| ret->debug_strtab = _bfd_xcoff_stringtab_init (); |
| ret->debug_section = NULL; |
| ret->loader_section = NULL; |
| ret->ldrel_count = 0; |
| memset (&ret->ldhdr, 0, sizeof (struct internal_ldhdr)); |
| ret->linkage_section = NULL; |
| ret->toc_section = NULL; |
| ret->descriptor_section = NULL; |
| ret->imports = NULL; |
| ret->file_align = 0; |
| ret->textro = false; |
| ret->gc = false; |
| memset (ret->special_sections, 0, sizeof ret->special_sections); |
| |
| /* The linker will always generate a full a.out header. We need to |
| record that fact now, before the sizeof_headers routine could be |
| called. */ |
| xcoff_data (abfd)->full_aouthdr = true; |
| |
| return &ret->root; |
| } |
| |
| /* Look up an entry in an XCOFF link hash table. */ |
| |
| #define xcoff_link_hash_lookup(table, string, create, copy, follow) \ |
| ((struct xcoff_link_hash_entry *) \ |
| bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\ |
| (follow))) |
| |
| /* Traverse an XCOFF link hash table. */ |
| |
| #define xcoff_link_hash_traverse(table, func, info) \ |
| (bfd_link_hash_traverse \ |
| (&(table)->root, \ |
| (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \ |
| (info))) |
| |
| /* Get the XCOFF link hash table from the info structure. This is |
| just a cast. */ |
| |
| #define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash)) |
| |
| /* Read internal relocs for an XCOFF csect. This is a wrapper around |
| _bfd_coff_read_internal_relocs which tries to take advantage of any |
| relocs which may have been cached for the enclosing section. */ |
| |
| static struct internal_reloc * |
| xcoff_read_internal_relocs (abfd, sec, cache, external_relocs, |
| require_internal, internal_relocs) |
| bfd *abfd; |
| asection *sec; |
| boolean cache; |
| bfd_byte *external_relocs; |
| boolean require_internal; |
| struct internal_reloc *internal_relocs; |
| { |
| if (coff_section_data (abfd, sec) != NULL |
| && coff_section_data (abfd, sec)->relocs == NULL |
| && xcoff_section_data (abfd, sec) != NULL) |
| { |
| asection *enclosing; |
| |
| enclosing = xcoff_section_data (abfd, sec)->enclosing; |
| |
| if (enclosing != NULL |
| && (coff_section_data (abfd, enclosing) == NULL |
| || coff_section_data (abfd, enclosing)->relocs == NULL) |
| && cache |
| && enclosing->reloc_count > 0) |
| { |
| if (_bfd_coff_read_internal_relocs (abfd, enclosing, true, |
| external_relocs, false, |
| (struct internal_reloc *) NULL) |
| == NULL) |
| return NULL; |
| } |
| |
| if (enclosing != NULL |
| && coff_section_data (abfd, enclosing) != NULL |
| && coff_section_data (abfd, enclosing)->relocs != NULL) |
| { |
| size_t off; |
| |
| off = ((sec->rel_filepos - enclosing->rel_filepos) |
| / bfd_coff_relsz (abfd)); |
| if (! require_internal) |
| return coff_section_data (abfd, enclosing)->relocs + off; |
| memcpy (internal_relocs, |
| coff_section_data (abfd, enclosing)->relocs + off, |
| sec->reloc_count * sizeof (struct internal_reloc)); |
| return internal_relocs; |
| } |
| } |
| |
| return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs, |
| require_internal, internal_relocs); |
| } |
| |
| /* Given an XCOFF BFD, add symbols to the global hash table as |
| appropriate. */ |
| |
| boolean |
| _bfd_xcoff_bfd_link_add_symbols (abfd, info) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| { |
| switch (bfd_get_format (abfd)) |
| { |
| case bfd_object: |
| return xcoff_link_add_object_symbols (abfd, info); |
| |
| case bfd_archive: |
| /* If the archive has a map, do the usual search. We then need |
| to check the archive for stripped dynamic objects, because |
| they will not appear in the archive map even though they |
| should, perhaps, be included. If the archive has no map, we |
| just consider each object file in turn, since that apparently |
| is what the AIX native linker does. */ |
| if (bfd_has_map (abfd)) |
| { |
| if (! (_bfd_generic_link_add_archive_symbols |
| (abfd, info, xcoff_link_check_archive_element))) |
| return false; |
| } |
| |
| { |
| bfd *member; |
| |
| member = bfd_openr_next_archived_file (abfd, (bfd *) NULL); |
| while (member != NULL) |
| { |
| if (bfd_check_format (member, bfd_object) |
| && (! bfd_has_map (abfd) |
| || ((member->flags & DYNAMIC) != 0 |
| && (member->flags & HAS_SYMS) == 0))) |
| { |
| boolean needed; |
| |
| if (! xcoff_link_check_archive_element (member, info, &needed)) |
| return false; |
| if (needed) |
| member->archive_pass = -1; |
| } |
| member = bfd_openr_next_archived_file (abfd, member); |
| } |
| } |
| |
| return true; |
| |
| default: |
| bfd_set_error (bfd_error_wrong_format); |
| return false; |
| } |
| } |
| |
| /* Add symbols from an XCOFF object file. */ |
| |
| static boolean |
| xcoff_link_add_object_symbols (abfd, info) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| { |
| if (! _bfd_coff_get_external_symbols (abfd)) |
| return false; |
| if (! xcoff_link_add_symbols (abfd, info)) |
| return false; |
| if (! info->keep_memory) |
| { |
| if (! _bfd_coff_free_symbols (abfd)) |
| return false; |
| } |
| return true; |
| } |
| |
| /* Check a single archive element to see if we need to include it in |
| the link. *PNEEDED is set according to whether this element is |
| needed in the link or not. This is called via |
| _bfd_generic_link_add_archive_symbols. */ |
| |
| static boolean |
| xcoff_link_check_archive_element (abfd, info, pneeded) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| boolean *pneeded; |
| { |
| if (! _bfd_coff_get_external_symbols (abfd)) |
| return false; |
| |
| if (! xcoff_link_check_ar_symbols (abfd, info, pneeded)) |
| return false; |
| |
| if (*pneeded) |
| { |
| if (! xcoff_link_add_symbols (abfd, info)) |
| return false; |
| } |
| |
| if (! info->keep_memory || ! *pneeded) |
| { |
| if (! _bfd_coff_free_symbols (abfd)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* Look through the symbols to see if this object file should be |
| included in the link. */ |
| |
| static boolean |
| xcoff_link_check_ar_symbols (abfd, info, pneeded) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| boolean *pneeded; |
| { |
| bfd_size_type symesz; |
| bfd_byte *esym; |
| bfd_byte *esym_end; |
| |
| *pneeded = false; |
| |
| if ((abfd->flags & DYNAMIC) != 0 |
| && ! info->static_link |
| && info->hash->creator == abfd->xvec) |
| return xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded); |
| |
| symesz = bfd_coff_symesz (abfd); |
| esym = (bfd_byte *) obj_coff_external_syms (abfd); |
| esym_end = esym + obj_raw_syment_count (abfd) * symesz; |
| while (esym < esym_end) |
| { |
| struct internal_syment sym; |
| |
| bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); |
| |
| if (sym.n_sclass == C_EXT && sym.n_scnum != N_UNDEF) |
| { |
| const char *name; |
| char buf[SYMNMLEN + 1]; |
| struct bfd_link_hash_entry *h; |
| |
| /* This symbol is externally visible, and is defined by this |
| object file. */ |
| |
| name = _bfd_coff_internal_syment_name (abfd, &sym, buf); |
| if (name == NULL) |
| return false; |
| h = bfd_link_hash_lookup (info->hash, name, false, false, true); |
| |
| /* We are only interested in symbols that are currently |
| undefined. If a symbol is currently known to be common, |
| XCOFF linkers do not bring in an object file which |
| defines it. We also don't bring in symbols to satisfy |
| undefined references in shared objects. */ |
| if (h != (struct bfd_link_hash_entry *) NULL |
| && h->type == bfd_link_hash_undefined |
| && (info->hash->creator != abfd->xvec |
| || (((struct xcoff_link_hash_entry *) h)->flags |
| & XCOFF_DEF_DYNAMIC) == 0)) |
| { |
| if (! (*info->callbacks->add_archive_element) (info, abfd, name)) |
| return false; |
| *pneeded = true; |
| return true; |
| } |
| } |
| |
| esym += (sym.n_numaux + 1) * symesz; |
| } |
| |
| /* We do not need this object file. */ |
| return true; |
| } |
| |
| /* Look through the loader symbols to see if this dynamic object |
| should be included in the link. The native linker uses the loader |
| symbols, not the normal symbol table, so we do too. */ |
| |
| static boolean |
| xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| boolean *pneeded; |
| { |
| asection *lsec; |
| bfd_byte *buf; |
| struct internal_ldhdr ldhdr; |
| const char *strings; |
| struct external_ldsym *elsym, *elsymend; |
| |
| *pneeded = false; |
| |
| lsec = bfd_get_section_by_name (abfd, ".loader"); |
| if (lsec == NULL) |
| { |
| /* There are no symbols, so don't try to include it. */ |
| return true; |
| } |
| |
| if (! xcoff_get_section_contents (abfd, lsec)) |
| return false; |
| buf = coff_section_data (abfd, lsec)->contents; |
| |
| xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr); |
| |
| strings = (char *) buf + ldhdr.l_stoff; |
| |
| elsym = (struct external_ldsym *) (buf + LDHDRSZ); |
| elsymend = elsym + ldhdr.l_nsyms; |
| for (; elsym < elsymend; elsym++) |
| { |
| struct internal_ldsym ldsym; |
| char nambuf[SYMNMLEN + 1]; |
| const char *name; |
| struct bfd_link_hash_entry *h; |
| |
| xcoff_swap_ldsym_in (abfd, elsym, &ldsym); |
| |
| /* We are only interested in exported symbols. */ |
| if ((ldsym.l_smtype & L_EXPORT) == 0) |
| continue; |
| |
| if (ldsym._l._l_l._l_zeroes == 0) |
| name = strings + ldsym._l._l_l._l_offset; |
| else |
| { |
| memcpy (nambuf, ldsym._l._l_name, SYMNMLEN); |
| nambuf[SYMNMLEN] = '\0'; |
| name = nambuf; |
| } |
| |
| h = bfd_link_hash_lookup (info->hash, name, false, false, true); |
| |
| /* We are only interested in symbols that are currently |
| undefined. At this point we know that we are using an XCOFF |
| hash table. */ |
| if (h != NULL |
| && h->type == bfd_link_hash_undefined |
| && (((struct xcoff_link_hash_entry *) h)->flags |
| & XCOFF_DEF_DYNAMIC) == 0) |
| { |
| if (! (*info->callbacks->add_archive_element) (info, abfd, name)) |
| return false; |
| *pneeded = true; |
| return true; |
| } |
| } |
| |
| /* We do not need this shared object. */ |
| |
| if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents) |
| { |
| free (coff_section_data (abfd, lsec)->contents); |
| coff_section_data (abfd, lsec)->contents = NULL; |
| } |
| |
| return true; |
| } |
| |
| /* Returns the index of reloc in RELOCS with the least address greater |
| than or equal to ADDRESS. The relocs are sorted by address. */ |
| |
| static bfd_size_type |
| xcoff_find_reloc (relocs, count, address) |
| struct internal_reloc *relocs; |
| bfd_size_type count; |
| bfd_vma address; |
| { |
| bfd_size_type min, max, this; |
| |
| if (count < 2) |
| { |
| if (count == 1 && relocs[0].r_vaddr < address) |
| return 1; |
| else |
| return 0; |
| } |
| |
| min = 0; |
| max = count; |
| |
| /* Do a binary search over (min,max]. */ |
| while (min + 1 < max) |
| { |
| bfd_vma raddr; |
| |
| this = (max + min) / 2; |
| raddr = relocs[this].r_vaddr; |
| if (raddr > address) |
| max = this; |
| else if (raddr < address) |
| min = this; |
| else |
| { |
| min = this; |
| break; |
| } |
| } |
| |
| if (relocs[min].r_vaddr < address) |
| return min + 1; |
| |
| while (min > 0 |
| && relocs[min - 1].r_vaddr == address) |
| --min; |
| |
| return min; |
| } |
| |
| /* Add all the symbols from an object file to the hash table. |
| |
| XCOFF is a weird format. A normal XCOFF .o files will have three |
| COFF sections--.text, .data, and .bss--but each COFF section will |
| contain many csects. These csects are described in the symbol |
| table. From the linker's point of view, each csect must be |
| considered a section in its own right. For example, a TOC entry is |
| handled as a small XMC_TC csect. The linker must be able to merge |
| different TOC entries together, which means that it must be able to |
| extract the XMC_TC csects from the .data section of the input .o |
| file. |
| |
| From the point of view of our linker, this is, of course, a hideous |
| nightmare. We cope by actually creating sections for each csect, |
| and discarding the original sections. We then have to handle the |
| relocation entries carefully, since the only way to tell which |
| csect they belong to is to examine the address. */ |
| |
| static boolean |
| xcoff_link_add_symbols (abfd, info) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| { |
| unsigned int n_tmask; |
| unsigned int n_btshft; |
| boolean default_copy; |
| bfd_size_type symcount; |
| struct xcoff_link_hash_entry **sym_hash; |
| asection **csect_cache; |
| bfd_size_type linesz; |
| asection *o; |
| asection *last_real; |
| boolean keep_syms; |
| asection *csect; |
| unsigned int csect_index; |
| asection *first_csect; |
| bfd_size_type symesz; |
| bfd_byte *esym; |
| bfd_byte *esym_end; |
| struct reloc_info_struct |
| { |
| struct internal_reloc *relocs; |
| asection **csects; |
| bfd_byte *linenos; |
| } *reloc_info = NULL; |
| |
| keep_syms = obj_coff_keep_syms (abfd); |
| |
| if ((abfd->flags & DYNAMIC) != 0 |
| && ! info->static_link) |
| { |
| if (! xcoff_link_add_dynamic_symbols (abfd, info)) |
| return false; |
| } |
| |
| if (info->hash->creator == abfd->xvec) |
| { |
| /* We need to build a .loader section, so we do it here. This |
| won't work if we're producing an XCOFF output file with no |
| XCOFF input files. FIXME. */ |
| if (xcoff_hash_table (info)->loader_section == NULL) |
| { |
| asection *lsec; |
| |
| lsec = bfd_make_section_anyway (abfd, ".loader"); |
| if (lsec == NULL) |
| goto error_return; |
| xcoff_hash_table (info)->loader_section = lsec; |
| lsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY; |
| } |
| /* Likewise for the linkage section. */ |
| if (xcoff_hash_table (info)->linkage_section == NULL) |
| { |
| asection *lsec; |
| |
| lsec = bfd_make_section_anyway (abfd, ".gl"); |
| if (lsec == NULL) |
| goto error_return; |
| xcoff_hash_table (info)->linkage_section = lsec; |
| lsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY); |
| lsec->alignment_power = 2; |
| } |
| /* Likewise for the TOC section. */ |
| if (xcoff_hash_table (info)->toc_section == NULL) |
| { |
| asection *tsec; |
| |
| tsec = bfd_make_section_anyway (abfd, ".tc"); |
| if (tsec == NULL) |
| goto error_return; |
| xcoff_hash_table (info)->toc_section = tsec; |
| tsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY); |
| tsec->alignment_power = 2; |
| } |
| /* Likewise for the descriptor section. */ |
| if (xcoff_hash_table (info)->descriptor_section == NULL) |
| { |
| asection *dsec; |
| |
| dsec = bfd_make_section_anyway (abfd, ".ds"); |
| if (dsec == NULL) |
| goto error_return; |
| xcoff_hash_table (info)->descriptor_section = dsec; |
| dsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY); |
| dsec->alignment_power = 2; |
| } |
| /* Likewise for the .debug section. */ |
| if (xcoff_hash_table (info)->debug_section == NULL |
| && info->strip != strip_all) |
| { |
| asection *dsec; |
| |
| dsec = bfd_make_section_anyway (abfd, ".debug"); |
| if (dsec == NULL) |
| goto error_return; |
| xcoff_hash_table (info)->debug_section = dsec; |
| dsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY; |
| } |
| } |
| |
| if ((abfd->flags & DYNAMIC) != 0 |
| && ! info->static_link) |
| return true; |
| |
| n_tmask = coff_data (abfd)->local_n_tmask; |
| n_btshft = coff_data (abfd)->local_n_btshft; |
| |
| /* Define macros so that ISFCN, et. al., macros work correctly. */ |
| #define N_TMASK n_tmask |
| #define N_BTSHFT n_btshft |
| |
| if (info->keep_memory) |
| default_copy = false; |
| else |
| default_copy = true; |
| |
| symcount = obj_raw_syment_count (abfd); |
| |
| /* We keep a list of the linker hash table entries that correspond |
| to each external symbol. */ |
| sym_hash = ((struct xcoff_link_hash_entry **) |
| bfd_alloc (abfd, |
| (symcount |
| * sizeof (struct xcoff_link_hash_entry *)))); |
| if (sym_hash == NULL && symcount != 0) |
| goto error_return; |
| coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash; |
| memset (sym_hash, 0, |
| (size_t) symcount * sizeof (struct xcoff_link_hash_entry *)); |
| |
| /* Because of the weird stuff we are doing with XCOFF csects, we can |
| not easily determine which section a symbol is in, so we store |
| the information in the tdata for the input file. */ |
| csect_cache = ((asection **) |
| bfd_alloc (abfd, symcount * sizeof (asection *))); |
| if (csect_cache == NULL && symcount != 0) |
| goto error_return; |
| xcoff_data (abfd)->csects = csect_cache; |
| memset (csect_cache, 0, (size_t) symcount * sizeof (asection *)); |
| |
| /* While splitting sections into csects, we need to assign the |
| relocs correctly. The relocs and the csects must both be in |
| order by VMA within a given section, so we handle this by |
| scanning along the relocs as we process the csects. We index |
| into reloc_info using the section target_index. */ |
| reloc_info = ((struct reloc_info_struct *) |
| bfd_malloc ((abfd->section_count + 1) |
| * sizeof (struct reloc_info_struct))); |
| if (reloc_info == NULL) |
| goto error_return; |
| memset ((PTR) reloc_info, 0, |
| (abfd->section_count + 1) * sizeof (struct reloc_info_struct)); |
| |
| /* Read in the relocs and line numbers for each section. */ |
| linesz = bfd_coff_linesz (abfd); |
| last_real = NULL; |
| for (o = abfd->sections; o != NULL; o = o->next) |
| { |
| last_real = o; |
| if ((o->flags & SEC_RELOC) != 0) |
| { |
| reloc_info[o->target_index].relocs = |
| xcoff_read_internal_relocs (abfd, o, true, (bfd_byte *) NULL, |
| false, (struct internal_reloc *) NULL); |
| reloc_info[o->target_index].csects = |
| (asection **) bfd_malloc (o->reloc_count * sizeof (asection *)); |
| if (reloc_info[o->target_index].csects == NULL) |
| goto error_return; |
| memset (reloc_info[o->target_index].csects, 0, |
| o->reloc_count * sizeof (asection *)); |
| } |
| |
| if ((info->strip == strip_none || info->strip == strip_some) |
| && o->lineno_count > 0) |
| { |
| bfd_byte *linenos; |
| |
| linenos = (bfd_byte *) bfd_malloc (o->lineno_count * linesz); |
| if (linenos == NULL) |
| goto error_return; |
| reloc_info[o->target_index].linenos = linenos; |
| if (bfd_seek (abfd, o->line_filepos, SEEK_SET) != 0 |
| || (bfd_read (linenos, linesz, o->lineno_count, abfd) |
| != linesz * o->lineno_count)) |
| goto error_return; |
| } |
| } |
| |
| /* Don't let the linker relocation routines discard the symbols. */ |
| obj_coff_keep_syms (abfd) = true; |
| |
| csect = NULL; |
| csect_index = 0; |
| first_csect = NULL; |
| |
| symesz = bfd_coff_symesz (abfd); |
| BFD_ASSERT (symesz == bfd_coff_auxesz (abfd)); |
| esym = (bfd_byte *) obj_coff_external_syms (abfd); |
| esym_end = esym + symcount * symesz; |
| while (esym < esym_end) |
| { |
| struct internal_syment sym; |
| union internal_auxent aux; |
| const char *name; |
| char buf[SYMNMLEN + 1]; |
| int smtyp; |
| flagword flags; |
| asection *section; |
| bfd_vma value; |
| struct xcoff_link_hash_entry *set_toc; |
| |
| bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym); |
| |
| /* In this pass we are only interested in symbols with csect |
| information. */ |
| if (sym.n_sclass != C_EXT && sym.n_sclass != C_HIDEXT) |
| { |
| if (sym.n_sclass == C_FILE && csect != NULL) |
| { |
| xcoff_section_data (abfd, csect)->last_symndx = |
| ((esym |
| - (bfd_byte *) obj_coff_external_syms (abfd)) |
| / symesz); |
| csect = NULL; |
| } |
| |
| if (csect != NULL) |
| *csect_cache = csect; |
| else if (first_csect == NULL || sym.n_sclass == C_FILE) |
| *csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum); |
| else |
| *csect_cache = NULL; |
| esym += (sym.n_numaux + 1) * symesz; |
| sym_hash += sym.n_numaux + 1; |
| csect_cache += sym.n_numaux + 1; |
| continue; |
| } |
| |
| name = _bfd_coff_internal_syment_name (abfd, &sym, buf); |
| if (name == NULL) |
| goto error_return; |
| |
| /* If this symbol has line number information attached to it, |
| and we're not stripping it, count the number of entries and |
| add them to the count for this csect. In the final link pass |
| we are going to attach line number information by symbol, |
| rather than by section, in order to more easily handle |
| garbage collection. */ |
| if ((info->strip == strip_none || info->strip == strip_some) |
| && sym.n_numaux > 1 |
| && csect != NULL |
| && ISFCN (sym.n_type)) |
| { |
| union internal_auxent auxlin; |
| |
| bfd_coff_swap_aux_in (abfd, (PTR) (esym + symesz), |
| sym.n_type, sym.n_sclass, |
| 0, sym.n_numaux, (PTR) &auxlin); |
| if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0) |
| { |
| asection *enclosing; |
| bfd_size_type linoff; |
| |
| enclosing = xcoff_section_data (abfd, csect)->enclosing; |
| if (enclosing == NULL) |
| { |
| (*_bfd_error_handler) |
| (_("%s: `%s' has line numbers but no enclosing section"), |
| bfd_get_filename (abfd), name); |
| bfd_set_error (bfd_error_bad_value); |
| goto error_return; |
| } |
| linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr |
| - enclosing->line_filepos); |
| if (linoff < enclosing->lineno_count * linesz) |
| { |
| struct internal_lineno lin; |
| bfd_byte *linpstart; |
| |
| linpstart = (reloc_info[enclosing->target_index].linenos |
| + linoff); |
| bfd_coff_swap_lineno_in (abfd, (PTR) linpstart, (PTR) &lin); |
| if (lin.l_lnno == 0 |
| && ((bfd_size_type) lin.l_addr.l_symndx |
| == ((esym |
| - (bfd_byte *) obj_coff_external_syms (abfd)) |
| / symesz))) |
| { |
| bfd_byte *linpend, *linp; |
| |
| linpend = (reloc_info[enclosing->target_index].linenos |
| + enclosing->lineno_count * linesz); |
| for (linp = linpstart + linesz; |
| linp < linpend; |
| linp += linesz) |
| { |
| bfd_coff_swap_lineno_in (abfd, (PTR) linp, |
| (PTR) &lin); |
| if (lin.l_lnno == 0) |
| break; |
| } |
| csect->lineno_count += (linp - linpstart) / linesz; |
| /* The setting of line_filepos will only be |
| useful if all the line number entries for a |
| csect are contiguous; this only matters for |
| error reporting. */ |
| if (csect->line_filepos == 0) |
| csect->line_filepos = |
| auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| } |
| } |
| } |
| } |
| |
| /* Pick up the csect auxiliary information. */ |
| |
| if (sym.n_numaux == 0) |
| { |
| (*_bfd_error_handler) |
| (_("%s: class %d symbol `%s' has no aux entries"), |
| bfd_get_filename (abfd), sym.n_sclass, name); |
| bfd_set_error (bfd_error_bad_value); |
| goto error_return; |
| } |
| |
| bfd_coff_swap_aux_in (abfd, |
| (PTR) (esym + symesz * sym.n_numaux), |
| sym.n_type, sym.n_sclass, |
| sym.n_numaux - 1, sym.n_numaux, |
| (PTR) &aux); |
| |
| smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp); |
| |
| flags = BSF_GLOBAL; |
| section = NULL; |
| value = 0; |
| set_toc = NULL; |
| |
| switch (smtyp) |
| { |
| default: |
| (*_bfd_error_handler) |
| (_("%s: symbol `%s' has unrecognized csect type %d"), |
| bfd_get_filename (abfd), name, smtyp); |
| bfd_set_error (bfd_error_bad_value); |
| goto error_return; |
| |
| case XTY_ER: |
| /* This is an external reference. */ |
| if (sym.n_sclass == C_HIDEXT |
| || sym.n_scnum != N_UNDEF |
| || aux.x_csect.x_scnlen.l != 0) |
| { |
| (*_bfd_error_handler) |
| (_("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d"), |
| bfd_get_filename (abfd), name, sym.n_sclass, sym.n_scnum, |
| aux.x_csect.x_scnlen.l); |
| bfd_set_error (bfd_error_bad_value); |
| goto error_return; |
| } |
| |
| /* An XMC_XO external reference is actually a reference to |
| an absolute location. */ |
| if (aux.x_csect.x_smclas != XMC_XO) |
| section = bfd_und_section_ptr; |
| else |
| { |
| section = bfd_abs_section_ptr; |
| value = sym.n_value; |
| } |
| break; |
| |
| case XTY_SD: |
| /* This is a csect definition. */ |
| |
| if (csect != NULL) |
| { |
| xcoff_section_data (abfd, csect)->last_symndx = |
| ((esym |
| - (bfd_byte *) obj_coff_external_syms (abfd)) |
| / symesz); |
| } |
| |
| csect = NULL; |
| csect_index = -1; |
| |
| /* When we see a TOC anchor, we record the TOC value. */ |
| if (aux.x_csect.x_smclas == XMC_TC0) |
| { |
| if (sym.n_sclass != C_HIDEXT |
| || aux.x_csect.x_scnlen.l != 0) |
| { |
| (*_bfd_error_handler) |
| (_("%s: XMC_TC0 symbol `%s' is class %d scnlen %d"), |
| bfd_get_filename (abfd), name, sym.n_sclass, |
| aux.x_csect.x_scnlen.l); |
| bfd_set_error (bfd_error_bad_value); |
| goto error_return; |
| } |
| xcoff_data (abfd)->toc = sym.n_value; |
| } |
| |
| /* We must merge TOC entries for the same symbol. We can |
| merge two TOC entries if they are both C_HIDEXT, they |
| both have the same name, they are both 4 bytes long, and |
| they both have a relocation table entry for an external |
| symbol with the same name. Unfortunately, this means |
| that we must look through the relocations. Ick. */ |
| if (aux.x_csect.x_smclas == XMC_TC |
| && sym.n_sclass == C_HIDEXT |
| && aux.x_csect.x_scnlen.l == 4 |
| && info->hash->creator == abfd->xvec) |
| { |
| asection *enclosing; |
| struct internal_reloc *relocs; |
| bfd_size_type relindx; |
| struct internal_reloc *rel; |
| |
| enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum); |
| if (enclosing == NULL) |
| goto error_return; |
| |
| relocs = reloc_info[enclosing->target_index].relocs; |
| relindx = xcoff_find_reloc (relocs, enclosing->reloc_count, |
| sym.n_value); |
| rel = relocs + relindx; |
| if (relindx < enclosing->reloc_count |
| && rel->r_vaddr == (bfd_vma) sym.n_value |
| && rel->r_size == 31 |
| && rel->r_type == R_POS) |
| { |
| bfd_byte *erelsym; |
| struct internal_syment relsym; |
| |
| erelsym = ((bfd_byte *) obj_coff_external_syms (abfd) |
| + rel->r_symndx * symesz); |
| bfd_coff_swap_sym_in (abfd, (PTR) erelsym, (PTR) &relsym); |
| if (relsym.n_sclass == C_EXT) |
| { |
| const char *relname; |
| char relbuf[SYMNMLEN + 1]; |
| boolean copy; |
| struct xcoff_link_hash_entry *h; |
| |
| /* At this point we know that the TOC entry is |
| for an externally visible symbol. */ |
| relname = _bfd_coff_internal_syment_name (abfd, &relsym, |
| relbuf); |
| if (relname == NULL) |
| goto error_return; |
| |
| /* We only merge TOC entries if the TC name is |
| the same as the symbol name. This handles |
| the normal case, but not common cases like |
| SYM.P4 which gcc generates to store SYM + 4 |
| in the TOC. FIXME. */ |
| if (strcmp (name, relname) == 0) |
| { |
| copy = (! info->keep_memory |
| || relsym._n._n_n._n_zeroes != 0 |
| || relsym._n._n_n._n_offset == 0); |
| h = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| relname, true, copy, |
| false); |
| if (h == NULL) |
| goto error_return; |
| |
| /* At this point h->root.type could be |
| bfd_link_hash_new. That should be OK, |
| since we know for sure that we will come |
| across this symbol as we step through the |
| file. */ |
| |
| /* We store h in *sym_hash for the |
| convenience of the relocate_section |
| function. */ |
| *sym_hash = h; |
| |
| if (h->toc_section != NULL) |
| { |
| asection **rel_csects; |
| |
| /* We already have a TOC entry for this |
| symbol, so we can just ignore this |
| one. */ |
| rel_csects = |
| reloc_info[enclosing->target_index].csects; |
| rel_csects[relindx] = bfd_und_section_ptr; |
| break; |
| } |
| |
| /* We are about to create a TOC entry for |
| this symbol. */ |
| set_toc = h; |
| } |
| } |
| } |
| } |
| |
| /* We need to create a new section. We get the name from |
| the csect storage mapping class, so that the linker can |
| accumulate similar csects together. */ |
| { |
| static const char *csect_name_by_class[] = |
| { |
| ".pr", ".ro", ".db", ".tc", ".ua", ".rw", ".gl", ".xo", |
| ".sv", ".bs", ".ds", ".uc", ".ti", ".tb", NULL, ".tc0", |
| ".td" |
| }; |
| const char *csect_name; |
| asection *enclosing; |
| |
| if ((aux.x_csect.x_smclas >= |
| sizeof csect_name_by_class / sizeof csect_name_by_class[0]) |
| || csect_name_by_class[aux.x_csect.x_smclas] == NULL) |
| { |
| (*_bfd_error_handler) |
| (_("%s: symbol `%s' has unrecognized smclas %d"), |
| bfd_get_filename (abfd), name, aux.x_csect.x_smclas); |
| bfd_set_error (bfd_error_bad_value); |
| goto error_return; |
| } |
| |
| csect_name = csect_name_by_class[aux.x_csect.x_smclas]; |
| csect = bfd_make_section_anyway (abfd, csect_name); |
| if (csect == NULL) |
| goto error_return; |
| enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum); |
| if (enclosing == NULL) |
| goto error_return; |
| if (! bfd_is_abs_section (enclosing) |
| && ((bfd_vma) sym.n_value < enclosing->vma |
| || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l |
| > enclosing->vma + enclosing->_raw_size))) |
| { |
| (*_bfd_error_handler) |
| (_("%s: csect `%s' not in enclosing section"), |
| bfd_get_filename (abfd), name); |
| bfd_set_error (bfd_error_bad_value); |
| goto error_return; |
| } |
| csect->vma = sym.n_value; |
| csect->filepos = (enclosing->filepos |
| + sym.n_value |
| - enclosing->vma); |
| csect->_raw_size = aux.x_csect.x_scnlen.l; |
| csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; |
| csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp); |
| |
| /* Record the enclosing section in the tdata for this new |
| section. */ |
| csect->used_by_bfd = |
| (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata)); |
| if (csect->used_by_bfd == NULL) |
| goto error_return; |
| coff_section_data (abfd, csect)->tdata = |
| bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata)); |
| if (coff_section_data (abfd, csect)->tdata == NULL) |
| goto error_return; |
| xcoff_section_data (abfd, csect)->enclosing = enclosing; |
| xcoff_section_data (abfd, csect)->lineno_count = |
| enclosing->lineno_count; |
| |
| if (enclosing->owner == abfd) |
| { |
| struct internal_reloc *relocs; |
| bfd_size_type relindx; |
| struct internal_reloc *rel; |
| asection **rel_csect; |
| |
| relocs = reloc_info[enclosing->target_index].relocs; |
| relindx = xcoff_find_reloc (relocs, enclosing->reloc_count, |
| csect->vma); |
| rel = relocs + relindx; |
| rel_csect = (reloc_info[enclosing->target_index].csects |
| + relindx); |
| csect->rel_filepos = (enclosing->rel_filepos |
| + relindx * bfd_coff_relsz (abfd)); |
| while (relindx < enclosing->reloc_count |
| && *rel_csect == NULL |
| && rel->r_vaddr < csect->vma + csect->_raw_size) |
| { |
| *rel_csect = csect; |
| csect->flags |= SEC_RELOC; |
| ++csect->reloc_count; |
| ++relindx; |
| ++rel; |
| ++rel_csect; |
| } |
| } |
| |
| /* There are a number of other fields and section flags |
| which we do not bother to set. */ |
| |
| csect_index = ((esym |
| - (bfd_byte *) obj_coff_external_syms (abfd)) |
| / symesz); |
| |
| xcoff_section_data (abfd, csect)->first_symndx = csect_index; |
| |
| if (first_csect == NULL) |
| first_csect = csect; |
| |
| /* If this symbol is C_EXT, we treat it as starting at the |
| beginning of the newly created section. */ |
| if (sym.n_sclass == C_EXT) |
| { |
| section = csect; |
| value = 0; |
| } |
| |
| /* If this is a TOC section for a symbol, record it. */ |
| if (set_toc != NULL) |
| set_toc->toc_section = csect; |
| } |
| break; |
| |
| case XTY_LD: |
| /* This is a label definition. The x_scnlen field is the |
| symbol index of the csect. I believe that this must |
| always follow the appropriate XTY_SD symbol, so I will |
| insist on it. */ |
| { |
| boolean bad; |
| |
| bad = false; |
| if (aux.x_csect.x_scnlen.l < 0 |
| || (aux.x_csect.x_scnlen.l |
| >= esym - (bfd_byte *) obj_coff_external_syms (abfd))) |
| bad = true; |
| if (! bad) |
| { |
| section = xcoff_data (abfd)->csects[aux.x_csect.x_scnlen.l]; |
| if (section == NULL |
| || (section->flags & SEC_HAS_CONTENTS) == 0) |
| bad = true; |
| } |
| if (bad) |
| { |
| (*_bfd_error_handler) |
| (_("%s: misplaced XTY_LD `%s'"), |
| bfd_get_filename (abfd), name); |
| bfd_set_error (bfd_error_bad_value); |
| goto error_return; |
| } |
| |
| value = sym.n_value - csect->vma; |
| } |
| break; |
| |
| case XTY_CM: |
| /* This is an unitialized csect. We could base the name on |
| the storage mapping class, but we don't bother except for |
| an XMC_TD symbol. If this csect is externally visible, |
| it is a common symbol. We put XMC_TD symbols in sections |
| named .tocbss, and rely on the linker script to put that |
| in the TOC area. */ |
| |
| if (csect != NULL) |
| { |
| xcoff_section_data (abfd, csect)->last_symndx = |
| ((esym |
| - (bfd_byte *) obj_coff_external_syms (abfd)) |
| / symesz); |
| } |
| |
| if (aux.x_csect.x_smclas == XMC_TD) |
| csect = bfd_make_section_anyway (abfd, ".tocbss"); |
| else |
| csect = bfd_make_section_anyway (abfd, ".bss"); |
| if (csect == NULL) |
| goto error_return; |
| csect->vma = sym.n_value; |
| csect->_raw_size = aux.x_csect.x_scnlen.l; |
| csect->flags |= SEC_ALLOC; |
| csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp); |
| /* There are a number of other fields and section flags |
| which we do not bother to set. */ |
| |
| csect_index = ((esym |
| - (bfd_byte *) obj_coff_external_syms (abfd)) |
| / symesz); |
| |
| csect->used_by_bfd = |
| (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata)); |
| if (csect->used_by_bfd == NULL) |
| goto error_return; |
| coff_section_data (abfd, csect)->tdata = |
| bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata)); |
| if (coff_section_data (abfd, csect)->tdata == NULL) |
| goto error_return; |
| xcoff_section_data (abfd, csect)->first_symndx = csect_index; |
| |
| if (first_csect == NULL) |
| first_csect = csect; |
| |
| if (sym.n_sclass == C_EXT) |
| { |
| csect->flags |= SEC_IS_COMMON; |
| csect->_raw_size = 0; |
| section = csect; |
| value = aux.x_csect.x_scnlen.l; |
| } |
| |
| break; |
| } |
| |
| /* Check for magic symbol names. */ |
| if ((smtyp == XTY_SD || smtyp == XTY_CM) |
| && aux.x_csect.x_smclas != XMC_TC |
| && aux.x_csect.x_smclas != XMC_TD) |
| { |
| int i; |
| |
| i = -1; |
| if (name[0] == '_') |
| { |
| if (strcmp (name, "_text") == 0) |
| i = 0; |
| else if (strcmp (name, "_etext") == 0) |
| i = 1; |
| else if (strcmp (name, "_data") == 0) |
| i = 2; |
| else if (strcmp (name, "_edata") == 0) |
| i = 3; |
| else if (strcmp (name, "_end") == 0) |
| i = 4; |
| } |
| else if (name[0] == 'e' && strcmp (name, "end") == 0) |
| i = 5; |
| |
| if (i != -1) |
| xcoff_hash_table (info)->special_sections[i] = csect; |
| } |
| |
| /* Now we have enough information to add the symbol to the |
| linker hash table. */ |
| |
| if (sym.n_sclass == C_EXT) |
| { |
| boolean copy; |
| |
| BFD_ASSERT (section != NULL); |
| |
| /* We must copy the name into memory if we got it from the |
| syment itself, rather than the string table. */ |
| copy = default_copy; |
| if (sym._n._n_n._n_zeroes != 0 |
| || sym._n._n_n._n_offset == 0) |
| copy = true; |
| |
| /* The AIX linker appears to only detect multiple symbol |
| definitions when there is a reference to the symbol. If |
| a symbol is defined multiple times, and the only |
| references are from the same object file, the AIX linker |
| appears to permit it. It does not merge the different |
| definitions, but handles them independently. On the |
| other hand, if there is a reference, the linker reports |
| an error. |
| |
| This matters because the AIX <net/net_globals.h> header |
| file actually defines an initialized array, so we have to |
| actually permit that to work. |
| |
| Just to make matters even more confusing, the AIX linker |
| appears to permit multiple symbol definitions whenever |
| the second definition is in an archive rather than an |
| object file. This may be a consequence of the manner in |
| which it handles archives: I think it may load the entire |
| archive in as separate csects, and then let garbage |
| collection discard symbols. |
| |
| We also have to handle the case of statically linking a |
| shared object, which will cause symbol redefinitions, |
| although this is an easier case to detect. */ |
| |
| if (info->hash->creator == abfd->xvec) |
| { |
| if (! bfd_is_und_section (section)) |
| *sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| name, true, copy, false); |
| else |
| *sym_hash = ((struct xcoff_link_hash_entry *) |
| bfd_wrapped_link_hash_lookup (abfd, info, name, |
| true, copy, false)); |
| if (*sym_hash == NULL) |
| goto error_return; |
| if (((*sym_hash)->root.type == bfd_link_hash_defined |
| || (*sym_hash)->root.type == bfd_link_hash_defweak) |
| && ! bfd_is_und_section (section) |
| && ! bfd_is_com_section (section)) |
| { |
| /* This is a second definition of a defined symbol. */ |
| if ((abfd->flags & DYNAMIC) != 0 |
| && ((*sym_hash)->smclas != XMC_GL |
| || aux.x_csect.x_smclas == XMC_GL |
| || ((*sym_hash)->root.u.def.section->owner->flags |
| & DYNAMIC) == 0)) |
| { |
| /* The new symbol is from a shared library, and |
| either the existing symbol is not global |
| linkage code or this symbol is global linkage |
| code. If the existing symbol is global |
| linkage code and the new symbol is not, then |
| we want to use the new symbol. */ |
| section = bfd_und_section_ptr; |
| value = 0; |
| } |
| else if (((*sym_hash)->root.u.def.section->owner->flags |
| & DYNAMIC) != 0) |
| { |
| /* The existing symbol is from a shared library. |
| Replace it. */ |
| (*sym_hash)->root.type = bfd_link_hash_undefined; |
| (*sym_hash)->root.u.undef.abfd = |
| (*sym_hash)->root.u.def.section->owner; |
| } |
| else if (abfd->my_archive != NULL) |
| { |
| /* This is a redefinition in an object contained |
| in an archive. Just ignore it. See the |
| comment above. */ |
| section = bfd_und_section_ptr; |
| value = 0; |
| } |
| else if ((*sym_hash)->root.next != NULL |
| || info->hash->undefs_tail == &(*sym_hash)->root) |
| { |
| /* This symbol has been referenced. In this |
| case, we just continue and permit the |
| multiple definition error. See the comment |
| above about the behaviour of the AIX linker. */ |
| } |
| else if ((*sym_hash)->smclas == aux.x_csect.x_smclas) |
| { |
| /* The symbols are both csects of the same |
| class. There is at least a chance that this |
| is a semi-legitimate redefinition. */ |
| section = bfd_und_section_ptr; |
| value = 0; |
| (*sym_hash)->flags |= XCOFF_MULTIPLY_DEFINED; |
| } |
| } |
| else if (((*sym_hash)->flags & XCOFF_MULTIPLY_DEFINED) != 0 |
| && ((*sym_hash)->root.type == bfd_link_hash_defined |
| || (*sym_hash)->root.type == bfd_link_hash_defweak) |
| && (bfd_is_und_section (section) |
| || bfd_is_com_section (section))) |
| { |
| /* This is a reference to a multiply defined symbol. |
| Report the error now. See the comment above |
| about the behaviour of the AIX linker. We could |
| also do this with warning symbols, but I'm not |
| sure the XCOFF linker is wholly prepared to |
| handle them, and that would only be a warning, |
| not an error. */ |
| if (! ((*info->callbacks->multiple_definition) |
| (info, (*sym_hash)->root.root.string, |
| (bfd *) NULL, (asection *) NULL, 0, |
| (*sym_hash)->root.u.def.section->owner, |
| (*sym_hash)->root.u.def.section, |
| (*sym_hash)->root.u.def.value))) |
| goto error_return; |
| /* Try not to give this error too many times. */ |
| (*sym_hash)->flags &= ~XCOFF_MULTIPLY_DEFINED; |
| } |
| } |
| |
| /* _bfd_generic_link_add_one_symbol may call the linker to |
| generate an error message, and the linker may try to read |
| the symbol table to give a good error. Right now, the |
| line numbers are in an inconsistent state, since they are |
| counted both in the real sections and in the new csects. |
| We need to leave the count in the real sections so that |
| the linker can report the line number of the error |
| correctly, so temporarily clobber the link to the csects |
| so that the linker will not try to read the line numbers |
| a second time from the csects. */ |
| BFD_ASSERT (last_real->next == first_csect); |
| last_real->next = NULL; |
| if (! (_bfd_generic_link_add_one_symbol |
| (info, abfd, name, flags, section, value, |
| (const char *) NULL, copy, true, |
| (struct bfd_link_hash_entry **) sym_hash))) |
| goto error_return; |
| last_real->next = first_csect; |
| |
| if (smtyp == XTY_CM) |
| { |
| if ((*sym_hash)->root.type != bfd_link_hash_common |
| || (*sym_hash)->root.u.c.p->section != csect) |
| { |
| /* We don't need the common csect we just created. */ |
| csect->_raw_size = 0; |
| } |
| else |
| { |
| (*sym_hash)->root.u.c.p->alignment_power |
| = csect->alignment_power; |
| } |
| } |
| |
| if (info->hash->creator == abfd->xvec) |
| { |
| int flag; |
| |
| if (smtyp == XTY_ER || smtyp == XTY_CM) |
| flag = XCOFF_REF_REGULAR; |
| else |
| flag = XCOFF_DEF_REGULAR; |
| (*sym_hash)->flags |= flag; |
| |
| if ((*sym_hash)->smclas == XMC_UA |
| || flag == XCOFF_DEF_REGULAR) |
| (*sym_hash)->smclas = aux.x_csect.x_smclas; |
| } |
| } |
| |
| *csect_cache = csect; |
| |
| esym += (sym.n_numaux + 1) * symesz; |
| sym_hash += sym.n_numaux + 1; |
| csect_cache += sym.n_numaux + 1; |
| } |
| |
| BFD_ASSERT (last_real == NULL || last_real->next == first_csect); |
| |
| /* Make sure that we have seen all the relocs. */ |
| for (o = abfd->sections; o != first_csect; o = o->next) |
| { |
| /* Reset the section size and the line number count, since the |
| data is now attached to the csects. Don't reset the size of |
| the .debug section, since we need to read it below in |
| bfd_xcoff_size_dynamic_sections. */ |
| if (strcmp (bfd_get_section_name (abfd, o), ".debug") != 0) |
| o->_raw_size = 0; |
| o->lineno_count = 0; |
| |
| if ((o->flags & SEC_RELOC) != 0) |
| { |
| bfd_size_type i; |
| struct internal_reloc *rel; |
| asection **rel_csect; |
| |
| rel = reloc_info[o->target_index].relocs; |
| rel_csect = reloc_info[o->target_index].csects; |
| for (i = 0; i < o->reloc_count; i++, rel++, rel_csect++) |
| { |
| if (*rel_csect == NULL) |
| { |
| (*_bfd_error_handler) |
| (_("%s: reloc %s:%d not in csect"), |
| bfd_get_filename (abfd), o->name, i); |
| bfd_set_error (bfd_error_bad_value); |
| goto error_return; |
| } |
| |
| /* We identify all symbols which are called, so that we |
| can create glue code for calls to functions imported |
| from dynamic objects. */ |
| if (info->hash->creator == abfd->xvec |
| && *rel_csect != bfd_und_section_ptr |
| && (rel->r_type == R_BR |
| || rel->r_type == R_RBR) |
| && obj_xcoff_sym_hashes (abfd)[rel->r_symndx] != NULL) |
| { |
| struct xcoff_link_hash_entry *h; |
| |
| h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx]; |
| h->flags |= XCOFF_CALLED; |
| /* If the symbol name starts with a period, it is |
| the code of a function. If the symbol is |
| currently undefined, then add an undefined symbol |
| for the function descriptor. This should do no |
| harm, because any regular object that defines the |
| function should also define the function |
| descriptor. It helps, because it means that we |
| will identify the function descriptor with a |
| dynamic object if a dynamic object defines it. */ |
| if (h->root.root.string[0] == '.' |
| && h->descriptor == NULL) |
| { |
| struct xcoff_link_hash_entry *hds; |
| |
| hds = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| h->root.root.string + 1, |
| true, false, true); |
| if (hds == NULL) |
| goto error_return; |
| if (hds->root.type == bfd_link_hash_new) |
| { |
| if (! (_bfd_generic_link_add_one_symbol |
| (info, abfd, hds->root.root.string, |
| (flagword) 0, bfd_und_section_ptr, |
| (bfd_vma) 0, (const char *) NULL, false, |
| true, |
| (struct bfd_link_hash_entry **) &hds))) |
| goto error_return; |
| } |
| hds->flags |= XCOFF_DESCRIPTOR; |
| BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0 |
| && (h->flags & XCOFF_DESCRIPTOR) == 0); |
| hds->descriptor = h; |
| h->descriptor = hds; |
| } |
| } |
| } |
| |
| free (reloc_info[o->target_index].csects); |
| reloc_info[o->target_index].csects = NULL; |
| |
| /* Reset SEC_RELOC and the reloc_count, since the reloc |
| information is now attached to the csects. */ |
| o->flags &=~ SEC_RELOC; |
| o->reloc_count = 0; |
| |
| /* If we are not keeping memory, free the reloc information. */ |
| if (! info->keep_memory |
| && coff_section_data (abfd, o) != NULL |
| && coff_section_data (abfd, o)->relocs != NULL |
| && ! coff_section_data (abfd, o)->keep_relocs) |
| { |
| free (coff_section_data (abfd, o)->relocs); |
| coff_section_data (abfd, o)->relocs = NULL; |
| } |
| } |
| |
| /* Free up the line numbers. FIXME: We could cache these |
| somewhere for the final link, to avoid reading them again. */ |
| if (reloc_info[o->target_index].linenos != NULL) |
| { |
| free (reloc_info[o->target_index].linenos); |
| reloc_info[o->target_index].linenos = NULL; |
| } |
| } |
| |
| free (reloc_info); |
| |
| obj_coff_keep_syms (abfd) = keep_syms; |
| |
| return true; |
| |
| error_return: |
| if (reloc_info != NULL) |
| { |
| for (o = abfd->sections; o != NULL; o = o->next) |
| { |
| if (reloc_info[o->target_index].csects != NULL) |
| free (reloc_info[o->target_index].csects); |
| if (reloc_info[o->target_index].linenos != NULL) |
| free (reloc_info[o->target_index].linenos); |
| } |
| free (reloc_info); |
| } |
| obj_coff_keep_syms (abfd) = keep_syms; |
| return false; |
| } |
| |
| #undef N_TMASK |
| #undef N_BTSHFT |
| |
| /* This function is used to add symbols from a dynamic object to the |
| global symbol table. */ |
| |
| static boolean |
| xcoff_link_add_dynamic_symbols (abfd, info) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| { |
| asection *lsec; |
| bfd_byte *buf; |
| struct internal_ldhdr ldhdr; |
| const char *strings; |
| struct external_ldsym *elsym, *elsymend; |
| struct xcoff_import_file *n; |
| const char *bname; |
| const char *mname; |
| const char *s; |
| unsigned int c; |
| struct xcoff_import_file **pp; |
| |
| /* We can only handle a dynamic object if we are generating an XCOFF |
| output file. */ |
| if (info->hash->creator != abfd->xvec) |
| { |
| (*_bfd_error_handler) |
| (_("%s: XCOFF shared object when not producing XCOFF output"), |
| bfd_get_filename (abfd)); |
| bfd_set_error (bfd_error_invalid_operation); |
| return false; |
| } |
| |
| /* The symbols we use from a dynamic object are not the symbols in |
| the normal symbol table, but, rather, the symbols in the export |
| table. If there is a global symbol in a dynamic object which is |
| not in the export table, the loader will not be able to find it, |
| so we don't want to find it either. Also, on AIX 4.1.3, shr.o in |
| libc.a has symbols in the export table which are not in the |
| symbol table. */ |
| |
| /* Read in the .loader section. FIXME: We should really use the |
| o_snloader field in the a.out header, rather than grabbing the |
| section by name. */ |
| lsec = bfd_get_section_by_name (abfd, ".loader"); |
| if (lsec == NULL) |
| { |
| (*_bfd_error_handler) |
| (_("%s: dynamic object with no .loader section"), |
| bfd_get_filename (abfd)); |
| bfd_set_error (bfd_error_no_symbols); |
| return false; |
| } |
| |
| if (! xcoff_get_section_contents (abfd, lsec)) |
| return false; |
| buf = coff_section_data (abfd, lsec)->contents; |
| |
| /* Remove the sections from this object, so that they do not get |
| included in the link. */ |
| abfd->sections = NULL; |
| |
| xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr); |
| |
| strings = (char *) buf + ldhdr.l_stoff; |
| |
| elsym = (struct external_ldsym *) (buf + LDHDRSZ); |
| elsymend = elsym + ldhdr.l_nsyms; |
| BFD_ASSERT (sizeof (struct external_ldsym) == LDSYMSZ); |
| for (; elsym < elsymend; elsym++) |
| { |
| struct internal_ldsym ldsym; |
| char nambuf[SYMNMLEN + 1]; |
| const char *name; |
| struct xcoff_link_hash_entry *h; |
| |
| xcoff_swap_ldsym_in (abfd, elsym, &ldsym); |
| |
| /* We are only interested in exported symbols. */ |
| if ((ldsym.l_smtype & L_EXPORT) == 0) |
| continue; |
| |
| if (ldsym._l._l_l._l_zeroes == 0) |
| name = strings + ldsym._l._l_l._l_offset; |
| else |
| { |
| memcpy (nambuf, ldsym._l._l_name, SYMNMLEN); |
| nambuf[SYMNMLEN] = '\0'; |
| name = nambuf; |
| } |
| |
| /* Normally we could not call xcoff_link_hash_lookup in an add |
| symbols routine, since we might not be using an XCOFF hash |
| table. However, we verified above that we are using an XCOFF |
| hash table. */ |
| |
| h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, |
| true, true); |
| if (h == NULL) |
| return false; |
| |
| h->flags |= XCOFF_DEF_DYNAMIC; |
| |
| /* If the symbol is undefined, and the BFD it was found in is |
| not a dynamic object, change the BFD to this dynamic object, |
| so that we can get the correct import file ID. */ |
| if ((h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak) |
| && (h->root.u.undef.abfd == NULL |
| || (h->root.u.undef.abfd->flags & DYNAMIC) == 0)) |
| h->root.u.undef.abfd = abfd; |
| |
| if (h->root.type == bfd_link_hash_new) |
| { |
| h->root.type = bfd_link_hash_undefined; |
| h->root.u.undef.abfd = abfd; |
| /* We do not want to add this to the undefined symbol list. */ |
| } |
| |
| if (h->smclas == XMC_UA |
| || h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak) |
| h->smclas = ldsym.l_smclas; |
| |
| /* Unless this is an XMC_XO symbol, we don't bother to actually |
| define it, since we don't have a section to put it in anyhow. |
| Instead, the relocation routines handle the DEF_DYNAMIC flag |
| correctly. */ |
| |
| if (h->smclas == XMC_XO |
| && (h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak)) |
| { |
| /* This symbol has an absolute value. */ |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = bfd_abs_section_ptr; |
| h->root.u.def.value = ldsym.l_value; |
| } |
| |
| /* If this symbol defines a function descriptor, then it |
| implicitly defines the function code as well. */ |
| if (h->smclas == XMC_DS |
| || (h->smclas == XMC_XO && name[0] != '.')) |
| h->flags |= XCOFF_DESCRIPTOR; |
| if ((h->flags & XCOFF_DESCRIPTOR) != 0) |
| { |
| struct xcoff_link_hash_entry *hds; |
| |
| hds = h->descriptor; |
| if (hds == NULL) |
| { |
| char *dsnm; |
| |
| dsnm = bfd_malloc (strlen (name) + 2); |
| if (dsnm == NULL) |
| return false; |
| dsnm[0] = '.'; |
| strcpy (dsnm + 1, name); |
| hds = xcoff_link_hash_lookup (xcoff_hash_table (info), dsnm, |
| true, true, true); |
| free (dsnm); |
| if (hds == NULL) |
| return false; |
| |
| if (hds->root.type == bfd_link_hash_new) |
| { |
| hds->root.type = bfd_link_hash_undefined; |
| hds->root.u.undef.abfd = abfd; |
| /* We do not want to add this to the undefined |
| symbol list. */ |
| } |
| |
| hds->descriptor = h; |
| h->descriptor = hds; |
| } |
| |
| hds->flags |= XCOFF_DEF_DYNAMIC; |
| if (hds->smclas == XMC_UA) |
| hds->smclas = XMC_PR; |
| |
| /* An absolute symbol appears to actually define code, not a |
| function descriptor. This is how some math functions are |
| implemented on AIX 4.1. */ |
| if (h->smclas == XMC_XO |
| && (hds->root.type == bfd_link_hash_undefined |
| || hds->root.type == bfd_link_hash_undefweak)) |
| { |
| hds->smclas = XMC_XO; |
| hds->root.type = bfd_link_hash_defined; |
| hds->root.u.def.section = bfd_abs_section_ptr; |
| hds->root.u.def.value = ldsym.l_value; |
| } |
| } |
| } |
| |
| if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents) |
| { |
| free (coff_section_data (abfd, lsec)->contents); |
| coff_section_data (abfd, lsec)->contents = NULL; |
| } |
| |
| /* Record this file in the import files. */ |
| |
| n = ((struct xcoff_import_file *) |
| bfd_alloc (abfd, sizeof (struct xcoff_import_file))); |
| if (n == NULL) |
| return false; |
| n->next = NULL; |
| |
| /* For some reason, the path entry in the import file list for a |
| shared object appears to always be empty. The file name is the |
| base name. */ |
| n->path = ""; |
| if (abfd->my_archive == NULL) |
| { |
| bname = bfd_get_filename (abfd); |
| mname = ""; |
| } |
| else |
| { |
| bname = bfd_get_filename (abfd->my_archive); |
| mname = bfd_get_filename (abfd); |
| } |
| s = strrchr (bname, '/'); |
| if (s != NULL) |
| bname = s + 1; |
| n->file = bname; |
| n->member = mname; |
| |
| /* We start c at 1 because the first import file number is reserved |
| for LIBPATH. */ |
| for (pp = &xcoff_hash_table (info)->imports, c = 1; |
| *pp != NULL; |
| pp = &(*pp)->next, ++c) |
| ; |
| *pp = n; |
| |
| xcoff_data (abfd)->import_file_id = c; |
| |
| return true; |
| } |
| |
| /* Routines that are called after all the input files have been |
| handled, but before the sections are laid out in memory. */ |
| |
| /* Mark a symbol as not being garbage, including the section in which |
| it is defined. */ |
| |
| static INLINE boolean |
| xcoff_mark_symbol (info, h) |
| struct bfd_link_info *info; |
| struct xcoff_link_hash_entry *h; |
| { |
| if ((h->flags & XCOFF_MARK) != 0) |
| return true; |
| |
| h->flags |= XCOFF_MARK; |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| asection *hsec; |
| |
| hsec = h->root.u.def.section; |
| if (! bfd_is_abs_section (hsec) |
| && (hsec->flags & SEC_MARK) == 0) |
| { |
| if (! xcoff_mark (info, hsec)) |
| return false; |
| } |
| } |
| |
| if (h->toc_section != NULL |
| && (h->toc_section->flags & SEC_MARK) == 0) |
| { |
| if (! xcoff_mark (info, h->toc_section)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* The mark phase of garbage collection. For a given section, mark |
| it, and all the sections which define symbols to which it refers. |
| Because this function needs to look at the relocs, we also count |
| the number of relocs which need to be copied into the .loader |
| section. */ |
| |
| static boolean |
| xcoff_mark (info, sec) |
| struct bfd_link_info *info; |
| asection *sec; |
| { |
| if (bfd_is_abs_section (sec) |
| || (sec->flags & SEC_MARK) != 0) |
| return true; |
| |
| sec->flags |= SEC_MARK; |
| |
| if (sec->owner->xvec == info->hash->creator |
| && coff_section_data (sec->owner, sec) != NULL |
| && xcoff_section_data (sec->owner, sec) != NULL) |
| { |
| register struct xcoff_link_hash_entry **hp, **hpend; |
| struct internal_reloc *rel, *relend; |
| |
| /* Mark all the symbols in this section. */ |
| |
| hp = (obj_xcoff_sym_hashes (sec->owner) |
| + xcoff_section_data (sec->owner, sec)->first_symndx); |
| hpend = (obj_xcoff_sym_hashes (sec->owner) |
| + xcoff_section_data (sec->owner, sec)->last_symndx); |
| for (; hp < hpend; hp++) |
| { |
| register struct xcoff_link_hash_entry *h; |
| |
| h = *hp; |
| if (h != NULL |
| && (h->flags & XCOFF_MARK) == 0) |
| { |
| if (! xcoff_mark_symbol (info, h)) |
| return false; |
| } |
| } |
| |
| /* Look through the section relocs. */ |
| |
| if ((sec->flags & SEC_RELOC) != 0 |
| && sec->reloc_count > 0) |
| { |
| rel = xcoff_read_internal_relocs (sec->owner, sec, true, |
| (bfd_byte *) NULL, false, |
| (struct internal_reloc *) NULL); |
| if (rel == NULL) |
| return false; |
| relend = rel + sec->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| asection *rsec; |
| struct xcoff_link_hash_entry *h; |
| |
| if ((unsigned int) rel->r_symndx |
| > obj_raw_syment_count (sec->owner)) |
| continue; |
| |
| h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx]; |
| if (h != NULL |
| && (h->flags & XCOFF_MARK) == 0) |
| { |
| if (! xcoff_mark_symbol (info, h)) |
| return false; |
| } |
| |
| rsec = xcoff_data (sec->owner)->csects[rel->r_symndx]; |
| if (rsec != NULL |
| && (rsec->flags & SEC_MARK) == 0) |
| { |
| if (! xcoff_mark (info, rsec)) |
| return false; |
| } |
| |
| /* See if this reloc needs to be copied into the .loader |
| section. */ |
| switch (rel->r_type) |
| { |
| default: |
| if (h == NULL |
| || h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak |
| || h->root.type == bfd_link_hash_common |
| || ((h->flags & XCOFF_CALLED) != 0 |
| && (h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak) |
| && h->root.root.string[0] == '.' |
| && h->descriptor != NULL |
| && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0 |
| || ((h->descriptor->flags & XCOFF_IMPORT) != 0 |
| && (h->descriptor->flags |
| & XCOFF_DEF_REGULAR) == 0)))) |
| break; |
| /* Fall through. */ |
| case R_POS: |
| case R_NEG: |
| case R_RL: |
| case R_RLA: |
| ++xcoff_hash_table (info)->ldrel_count; |
| if (h != NULL) |
| h->flags |= XCOFF_LDREL; |
| break; |
| case R_TOC: |
| case R_GL: |
| case R_TCL: |
| case R_TRL: |
| case R_TRLA: |
| /* We should never need a .loader reloc for a TOC |
| relative reloc. */ |
| break; |
| } |
| } |
| |
| if (! info->keep_memory |
| && coff_section_data (sec->owner, sec) != NULL |
| && coff_section_data (sec->owner, sec)->relocs != NULL |
| && ! coff_section_data (sec->owner, sec)->keep_relocs) |
| { |
| free (coff_section_data (sec->owner, sec)->relocs); |
| coff_section_data (sec->owner, sec)->relocs = NULL; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| /* The sweep phase of garbage collection. Remove all garbage |
| sections. */ |
| |
| static void |
| xcoff_sweep (info) |
| struct bfd_link_info *info; |
| { |
| bfd *sub; |
| |
| for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
| { |
| asection *o; |
| |
| for (o = sub->sections; o != NULL; o = o->next) |
| { |
| if ((o->flags & SEC_MARK) == 0) |
| { |
| /* Keep all sections from non-XCOFF input files. Keep |
| special sections. Keep .debug sections for the |
| moment. */ |
| if (sub->xvec != info->hash->creator |
| || o == xcoff_hash_table (info)->debug_section |
| || o == xcoff_hash_table (info)->loader_section |
| || o == xcoff_hash_table (info)->linkage_section |
| || o == xcoff_hash_table (info)->toc_section |
| || o == xcoff_hash_table (info)->descriptor_section |
| || strcmp (o->name, ".debug") == 0) |
| o->flags |= SEC_MARK; |
| else |
| { |
| o->_raw_size = 0; |
| o->reloc_count = 0; |
| o->lineno_count = 0; |
| } |
| } |
| } |
| } |
| } |
| |
| /* Record the number of elements in a set. This is used to output the |
| correct csect length. */ |
| |
| boolean |
| bfd_xcoff_link_record_set (output_bfd, info, harg, size) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| struct bfd_link_hash_entry *harg; |
| bfd_size_type size; |
| { |
| struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; |
| struct xcoff_link_size_list *n; |
| |
| if (! XCOFF_XVECP (output_bfd->xvec)) |
| return true; |
| |
| /* This will hardly ever be called. I don't want to burn four bytes |
| per global symbol, so instead the size is kept on a linked list |
| attached to the hash table. */ |
| |
| n = ((struct xcoff_link_size_list *) |
| bfd_alloc (output_bfd, sizeof (struct xcoff_link_size_list))); |
| if (n == NULL) |
| return false; |
| n->next = xcoff_hash_table (info)->size_list; |
| n->h = h; |
| n->size = size; |
| xcoff_hash_table (info)->size_list = n; |
| |
| h->flags |= XCOFF_HAS_SIZE; |
| |
| return true; |
| } |
| |
| /* Import a symbol. */ |
| |
| boolean |
| bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile, |
| impmember) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| struct bfd_link_hash_entry *harg; |
| bfd_vma val; |
| const char *imppath; |
| const char *impfile; |
| const char *impmember; |
| { |
| struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; |
| |
| if (! XCOFF_XVECP (output_bfd->xvec)) |
| return true; |
| |
| /* A symbol name which starts with a period is the code for a |
| function. If the symbol is undefined, then add an undefined |
| symbol for the function descriptor, and import that instead. */ |
| if (h->root.root.string[0] == '.' |
| && h->root.type == bfd_link_hash_undefined |
| && val == (bfd_vma) -1) |
| { |
| struct xcoff_link_hash_entry *hds; |
| |
| hds = h->descriptor; |
| if (hds == NULL) |
| { |
| hds = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| h->root.root.string + 1, |
| true, false, true); |
| if (hds == NULL) |
| return false; |
| if (hds->root.type == bfd_link_hash_new) |
| { |
| hds->root.type = bfd_link_hash_undefined; |
| hds->root.u.undef.abfd = h->root.u.undef.abfd; |
| } |
| hds->flags |= XCOFF_DESCRIPTOR; |
| BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0 |
| && (h->flags & XCOFF_DESCRIPTOR) == 0); |
| hds->descriptor = h; |
| h->descriptor = hds; |
| } |
| |
| /* Now, if the descriptor is undefined, import the descriptor |
| rather than the symbol we were told to import. FIXME: Is |
| this correct in all cases? */ |
| if (hds->root.type == bfd_link_hash_undefined) |
| h = hds; |
| } |
| |
| h->flags |= XCOFF_IMPORT; |
| |
| if (val != (bfd_vma) -1) |
| { |
| if (h->root.type == bfd_link_hash_defined |
| && (! bfd_is_abs_section (h->root.u.def.section) |
| || h->root.u.def.value != val)) |
| { |
| if (! ((*info->callbacks->multiple_definition) |
| (info, h->root.root.string, h->root.u.def.section->owner, |
| h->root.u.def.section, h->root.u.def.value, |
| output_bfd, bfd_abs_section_ptr, val))) |
| return false; |
| } |
| |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = bfd_abs_section_ptr; |
| h->root.u.def.value = val; |
| } |
| |
| /* We overload the ldindx field to hold the l_ifile value for this |
| symbol. */ |
| BFD_ASSERT (h->ldsym == NULL); |
| BFD_ASSERT ((h->flags & XCOFF_BUILT_LDSYM) == 0); |
| if (imppath == NULL) |
| h->ldindx = -1; |
| else |
| { |
| unsigned int c; |
| struct xcoff_import_file **pp; |
| |
| /* We start c at 1 because the first entry in the import list is |
| reserved for the library search path. */ |
| for (pp = &xcoff_hash_table (info)->imports, c = 1; |
| *pp != NULL; |
| pp = &(*pp)->next, ++c) |
| { |
| if (strcmp ((*pp)->path, imppath) == 0 |
| && strcmp ((*pp)->file, impfile) == 0 |
| && strcmp ((*pp)->member, impmember) == 0) |
| break; |
| } |
| |
| if (*pp == NULL) |
| { |
| struct xcoff_import_file *n; |
| |
| n = ((struct xcoff_import_file *) |
| bfd_alloc (output_bfd, sizeof (struct xcoff_import_file))); |
| if (n == NULL) |
| return false; |
| n->next = NULL; |
| n->path = imppath; |
| n->file = impfile; |
| n->member = impmember; |
| *pp = n; |
| } |
| |
| h->ldindx = c; |
| } |
| |
| return true; |
| } |
| |
| /* Export a symbol. */ |
| |
| boolean |
| bfd_xcoff_export_symbol (output_bfd, info, harg, syscall) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| struct bfd_link_hash_entry *harg; |
| boolean syscall ATTRIBUTE_UNUSED; |
| { |
| struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg; |
| |
| if (! XCOFF_XVECP (output_bfd->xvec)) |
| return true; |
| |
| h->flags |= XCOFF_EXPORT; |
| |
| /* FIXME: I'm not at all sure what syscall is supposed to mean, so |
| I'm just going to ignore it until somebody explains it. */ |
| |
| /* See if this is a function descriptor. It may be one even though |
| it is not so marked. */ |
| if ((h->flags & XCOFF_DESCRIPTOR) == 0 |
| && h->root.root.string[0] != '.') |
| { |
| char *fnname; |
| struct xcoff_link_hash_entry *hfn; |
| |
| fnname = (char *) bfd_malloc (strlen (h->root.root.string) + 2); |
| if (fnname == NULL) |
| return false; |
| fnname[0] = '.'; |
| strcpy (fnname + 1, h->root.root.string); |
| hfn = xcoff_link_hash_lookup (xcoff_hash_table (info), |
| fnname, false, false, true); |
| free (fnname); |
| if (hfn != NULL |
| && hfn->smclas == XMC_PR |
| && (hfn->root.type == bfd_link_hash_defined |
| || hfn->root.type == bfd_link_hash_defweak)) |
| { |
| h->flags |= XCOFF_DESCRIPTOR; |
| h->descriptor = hfn; |
| hfn->descriptor = h; |
| } |
| } |
| |
| /* Make sure we don't garbage collect this symbol. */ |
| if (! xcoff_mark_symbol (info, h)) |
| return false; |
| |
| /* If this is a function descriptor, make sure we don't garbage |
| collect the associated function code. We normally don't have to |
| worry about this, because the descriptor will be attached to a |
| section with relocs, but if we are creating the descriptor |
| ourselves those relocs will not be visible to the mark code. */ |
| if ((h->flags & XCOFF_DESCRIPTOR) != 0) |
| { |
| if (! xcoff_mark_symbol (info, h->descriptor)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* Count a reloc against a symbol. This is called for relocs |
| generated by the linker script, typically for global constructors |
| and destructors. */ |
| |
| boolean |
| bfd_xcoff_link_count_reloc (output_bfd, info, name) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| const char *name; |
| { |
| struct xcoff_link_hash_entry *h; |
| |
| if (! XCOFF_XVECP (output_bfd->xvec)) |
| return true; |
| |
| h = ((struct xcoff_link_hash_entry *) |
| bfd_wrapped_link_hash_lookup (output_bfd, info, name, false, false, |
| false)); |
| if (h == NULL) |
| { |
| (*_bfd_error_handler) (_("%s: no such symbol"), name); |
| bfd_set_error (bfd_error_no_symbols); |
| return false; |
| } |
| |
| h->flags |= XCOFF_REF_REGULAR | XCOFF_LDREL; |
| ++xcoff_hash_table (info)->ldrel_count; |
| |
| /* Mark the symbol to avoid garbage collection. */ |
| if (! xcoff_mark_symbol (info, h)) |
| return false; |
| |
| return true; |
| } |
| |
| /* This function is called for each symbol to which the linker script |
| assigns a value. */ |
| |
| boolean |
| bfd_xcoff_record_link_assignment (output_bfd, info, name) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| const char *name; |
| { |
| struct xcoff_link_hash_entry *h; |
| |
| if (! XCOFF_XVECP (output_bfd->xvec)) |
| return true; |
| |
| h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, true, |
| false); |
| if (h == NULL) |
| return false; |
| |
| h->flags |= XCOFF_DEF_REGULAR; |
| |
| return true; |
| } |
| |
| /* This structure is used to pass information through |
| xcoff_link_hash_traverse. */ |
| |
| struct xcoff_loader_info |
| { |
| /* Set if a problem occurred. */ |
| boolean failed; |
| /* Output BFD. */ |
| bfd *output_bfd; |
| /* Link information structure. */ |
| struct bfd_link_info *info; |
| /* Whether all defined symbols should be exported. */ |
| boolean export_defineds; |
| /* Number of ldsym structures. */ |
| size_t ldsym_count; |
| /* Size of string table. */ |
| size_t string_size; |
| /* String table. */ |
| bfd_byte *strings; |
| /* Allocated size of string table. */ |
| size_t string_alc; |
| }; |
| |
| /* Build the .loader section. This is called by the XCOFF linker |
| emulation before_allocation routine. We must set the size of the |
| .loader section before the linker lays out the output file. |
| LIBPATH is the library path to search for shared objects; this is |
| normally built from the -L arguments passed to the linker. ENTRY |
| is the name of the entry point symbol (the -e linker option). |
| FILE_ALIGN is the alignment to use for sections within the file |
| (the -H linker option). MAXSTACK is the maximum stack size (the |
| -bmaxstack linker option). MAXDATA is the maximum data size (the |
| -bmaxdata linker option). GC is whether to do garbage collection |
| (the -bgc linker option). MODTYPE is the module type (the |
| -bmodtype linker option). TEXTRO is whether the text section must |
| be read only (the -btextro linker option). EXPORT_DEFINEDS is |
| whether all defined symbols should be exported (the -unix linker |
| option). SPECIAL_SECTIONS is set by this routine to csects with |
| magic names like _end. */ |
| |
| boolean |
| bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry, |
| file_align, maxstack, maxdata, gc, |
| modtype, textro, export_defineds, |
| special_sections) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| const char *libpath; |
| const char *entry; |
| unsigned long file_align; |
| unsigned long maxstack; |
| unsigned long maxdata; |
| boolean gc; |
| int modtype; |
| boolean textro; |
| boolean export_defineds; |
| asection **special_sections; |
| { |
| struct xcoff_link_hash_entry *hentry; |
| asection *lsec; |
| struct xcoff_loader_info ldinfo; |
| int i; |
| size_t impsize, impcount; |
| struct xcoff_import_file *fl; |
| struct internal_ldhdr *ldhdr; |
| bfd_size_type stoff; |
| register char *out; |
| asection *sec; |
| bfd *sub; |
| struct bfd_strtab_hash *debug_strtab; |
| bfd_byte *debug_contents = NULL; |
| |
| if (! XCOFF_XVECP (output_bfd->xvec)) |
| { |
| for (i = 0; i < 6; i++) |
| special_sections[i] = NULL; |
| return true; |
| } |
| |
| ldinfo.failed = false; |
| ldinfo.output_bfd = output_bfd; |
| ldinfo.info = info; |
| ldinfo.export_defineds = export_defineds; |
| ldinfo.ldsym_count = 0; |
| ldinfo.string_size = 0; |
| ldinfo.strings = NULL; |
| ldinfo.string_alc = 0; |
| |
| xcoff_data (output_bfd)->maxstack = maxstack; |
| xcoff_data (output_bfd)->maxdata = maxdata; |
| xcoff_data (output_bfd)->modtype = modtype; |
| |
| xcoff_hash_table (info)->file_align = file_align; |
| xcoff_hash_table (info)->textro = textro; |
| |
| if (entry == NULL) |
| hentry = NULL; |
| else |
| { |
| hentry = xcoff_link_hash_lookup (xcoff_hash_table (info), entry, |
| false, false, true); |
| if (hentry != NULL) |
| hentry->flags |= XCOFF_ENTRY; |
| } |
| |
| /* Garbage collect unused sections. */ |
| if (info->relocateable |
| || ! gc |
| || hentry == NULL |
| || (hentry->root.type != bfd_link_hash_defined |
| && hentry->root.type != bfd_link_hash_defweak)) |
| { |
| gc = false; |
| xcoff_hash_table (info)->gc = false; |
| |
| /* We still need to call xcoff_mark, in order to set ldrel_count |
| correctly. */ |
| for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
| { |
| asection *o; |
| |
| for (o = sub->sections; o != NULL; o = o->next) |
| { |
| if ((o->flags & SEC_MARK) == 0) |
| { |
| if (! xcoff_mark (info, o)) |
| goto error_return; |
| } |
| } |
| } |
| } |
| else |
| { |
| if (! xcoff_mark (info, hentry->root.u.def.section)) |
| goto error_return; |
| xcoff_sweep (info); |
| xcoff_hash_table (info)->gc = true; |
| } |
| |
| /* Return special sections to the caller. */ |
| for (i = 0; i < 6; i++) |
| { |
| asection *sec; |
| |
| sec = xcoff_hash_table (info)->special_sections[i]; |
| if (sec != NULL |
| && gc |
| && (sec->flags & SEC_MARK) == 0) |
| sec = NULL; |
| special_sections[i] = sec; |
| } |
| |
| if (info->input_bfds == NULL) |
| { |
| /* I'm not sure what to do in this bizarre case. */ |
| return true; |
| } |
| |
| xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_build_ldsyms, |
| (PTR) &ldinfo); |
| if (ldinfo.failed) |
| goto error_return; |
| |
| /* Work out the size of the import file names. Each import file ID |
| consists of three null terminated strings: the path, the file |
| name, and the archive member name. The first entry in the list |
| of names is the path to use to find objects, which the linker has |
| passed in as the libpath argument. For some reason, the path |
| entry in the other import file names appears to always be empty. */ |
| impsize = strlen (libpath) + 3; |
| impcount = 1; |
| for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next) |
| { |
| ++impcount; |
| impsize += (strlen (fl->path) |
| + strlen (fl->file) |
| + strlen (fl->member) |
| + 3); |
| } |
| |
| /* Set up the .loader section header. */ |
| ldhdr = &xcoff_hash_table (info)->ldhdr; |
| ldhdr->l_version = 1; |
| ldhdr->l_nsyms = ldinfo.ldsym_count; |
| ldhdr->l_nreloc = xcoff_hash_table (info)->ldrel_count; |
| ldhdr->l_istlen = impsize; |
| ldhdr->l_nimpid = impcount; |
| ldhdr->l_impoff = (LDHDRSZ |
| + ldhdr->l_nsyms * LDSYMSZ |
| + ldhdr->l_nreloc * LDRELSZ); |
| ldhdr->l_stlen = ldinfo.string_size; |
| stoff = ldhdr->l_impoff + impsize; |
| if (ldinfo.string_size == 0) |
| ldhdr->l_stoff = 0; |
| else |
| ldhdr->l_stoff = stoff; |
| |
| /* We now know the final size of the .loader section. Allocate |
| space for it. */ |
| lsec = xcoff_hash_table (info)->loader_section; |
| lsec->_raw_size = stoff + ldhdr->l_stlen; |
| lsec->contents = (bfd_byte *) bfd_zalloc (output_bfd, lsec->_raw_size); |
| if (lsec->contents == NULL) |
| goto error_return; |
| |
| /* Set up the header. */ |
| xcoff_swap_ldhdr_out (output_bfd, ldhdr, |
| (struct external_ldhdr *) lsec->contents); |
| |
| /* Set up the import file names. */ |
| out = (char *) lsec->contents + ldhdr->l_impoff; |
| strcpy (out, libpath); |
| out += strlen (libpath) + 1; |
| *out++ = '\0'; |
| *out++ = '\0'; |
| for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next) |
| { |
| register const char *s; |
| |
| s = fl->path; |
| while ((*out++ = *s++) != '\0') |
| ; |
| s = fl->file; |
| while ((*out++ = *s++) != '\0') |
| ; |
| s = fl->member; |
| while ((*out++ = *s++) != '\0') |
| ; |
| } |
| |
| BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff); |
| |
| /* Set up the symbol string table. */ |
| if (ldinfo.string_size > 0) |
| { |
| memcpy (out, ldinfo.strings, ldinfo.string_size); |
| free (ldinfo.strings); |
| ldinfo.strings = NULL; |
| } |
| |
| /* We can't set up the symbol table or the relocs yet, because we |
| don't yet know the final position of the various sections. The |
| .loader symbols are written out when the corresponding normal |
| symbols are written out in xcoff_link_input_bfd or |
| xcoff_write_global_symbol. The .loader relocs are written out |
| when the corresponding normal relocs are handled in |
| xcoff_link_input_bfd. */ |
| |
| /* Allocate space for the magic sections. */ |
| sec = xcoff_hash_table (info)->linkage_section; |
| if (sec->_raw_size > 0) |
| { |
| sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size); |
| if (sec->contents == NULL) |
| goto error_return; |
| } |
| sec = xcoff_hash_table (info)->toc_section; |
| if (sec->_raw_size > 0) |
| { |
| sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size); |
| if (sec->contents == NULL) |
| goto error_return; |
| } |
| sec = xcoff_hash_table (info)->descriptor_section; |
| if (sec->_raw_size > 0) |
| { |
| sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size); |
| if (sec->contents == NULL) |
| goto error_return; |
| } |
| |
| /* Now that we've done garbage collection, figure out the contents |
| of the .debug section. */ |
| debug_strtab = xcoff_hash_table (info)->debug_strtab; |
| |
| for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
| { |
| asection *subdeb; |
| bfd_size_type symcount; |
| unsigned long *debug_index; |
| asection **csectpp; |
| bfd_byte *esym, *esymend; |
| bfd_size_type symesz; |
| |
| if (sub->xvec != info->hash->creator) |
| continue; |
| subdeb = bfd_get_section_by_name (sub, ".debug"); |
| if (subdeb == NULL || subdeb->_raw_size == 0) |
| continue; |
| |
| if (info->strip == strip_all |
| || info->strip == strip_debugger |
| || info->discard == discard_all) |
| { |
| subdeb->_raw_size = 0; |
| continue; |
| } |
| |
| if (! _bfd_coff_get_external_symbols (sub)) |
| goto error_return; |
| |
| symcount = obj_raw_syment_count (sub); |
| debug_index = ((unsigned long *) |
| bfd_zalloc (sub, symcount * sizeof (unsigned long))); |
| if (debug_index == NULL) |
| goto error_return; |
| xcoff_data (sub)->debug_indices = debug_index; |
| |
| /* Grab the contents of the .debug section. We use malloc and |
| copy the names into the debug stringtab, rather than |
| bfd_alloc, because I expect that, when linking many files |
| together, many of the strings will be the same. Storing the |
| strings in the hash table should save space in this case. */ |
| debug_contents = (bfd_byte *) bfd_malloc (subdeb->_raw_size); |
| if (debug_contents == NULL) |
| goto error_return; |
| if (! bfd_get_section_contents (sub, subdeb, (PTR) debug_contents, |
| (file_ptr) 0, subdeb->_raw_size)) |
| goto error_return; |
| |
| csectpp = xcoff_data (sub)->csects; |
| |
| symesz = bfd_coff_symesz (sub); |
| esym = (bfd_byte *) obj_coff_external_syms (sub); |
| esymend = esym + symcount * symesz; |
| while (esym < esymend) |
| { |
| struct internal_syment sym; |
| |
| bfd_coff_swap_sym_in (sub, (PTR) esym, (PTR) &sym); |
| |
| *debug_index = (unsigned long) -1; |
| |
| if (sym._n._n_n._n_zeroes == 0 |
| && *csectpp != NULL |
| && (! gc |
| || ((*csectpp)->flags & SEC_MARK) != 0 |
| || *csectpp == bfd_abs_section_ptr) |
| && bfd_coff_symname_in_debug (sub, &sym)) |
| { |
| char *name; |
| bfd_size_type indx; |
| |
| name = (char *) debug_contents + sym._n._n_n._n_offset; |
| indx = _bfd_stringtab_add (debug_strtab, name, true, true); |
| if (indx == (bfd_size_type) -1) |
| goto error_return; |
| *debug_index = indx; |
| } |
| |
| esym += (sym.n_numaux + 1) * symesz; |
| csectpp += sym.n_numaux + 1; |
| debug_index += sym.n_numaux + 1; |
| } |
| |
| free (debug_contents); |
| debug_contents = NULL; |
| |
| /* Clear the size of subdeb, so that it is not included directly |
| in the output file. */ |
| subdeb->_raw_size = 0; |
| |
| if (! info->keep_memory) |
| { |
| if (! _bfd_coff_free_symbols (sub)) |
| goto error_return; |
| } |
| } |
| |
| if (info->strip != strip_all) |
| xcoff_hash_table (info)->debug_section->_raw_size = |
| _bfd_stringtab_size (debug_strtab); |
| |
| return true; |
| |
| error_return: |
| if (ldinfo.strings != NULL) |
| free (ldinfo.strings); |
| if (debug_contents != NULL) |
| free (debug_contents); |
| return false; |
| } |
| |
| /* Add a symbol to the .loader symbols, if necessary. */ |
| |
| static boolean |
| xcoff_build_ldsyms (h, p) |
| struct xcoff_link_hash_entry *h; |
| PTR p; |
| { |
| struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p; |
| size_t len; |
| |
| /* If this is a final link, and the symbol was defined as a common |
| symbol in a regular object file, and there was no definition in |
| any dynamic object, then the linker will have allocated space for |
| the symbol in a common section but the XCOFF_DEF_REGULAR flag |
| will not have been set. */ |
| if (h->root.type == bfd_link_hash_defined |
| && (h->flags & XCOFF_DEF_REGULAR) == 0 |
| && (h->flags & XCOFF_REF_REGULAR) != 0 |
| && (h->flags & XCOFF_DEF_DYNAMIC) == 0 |
| && (bfd_is_abs_section (h->root.u.def.section) |
| || (h->root.u.def.section->owner->flags & DYNAMIC) == 0)) |
| h->flags |= XCOFF_DEF_REGULAR; |
| |
| /* If all defined symbols should be exported, mark them now. We |
| don't want to export the actual functions, just the function |
| descriptors. */ |
| if (ldinfo->export_defineds |
| && (h->flags & XCOFF_DEF_REGULAR) != 0 |
| && h->root.root.string[0] != '.') |
| { |
| boolean export; |
| |
| /* We don't export a symbol which is being defined by an object |
| included from an archive which contains a shared object. The |
| rationale is that if an archive contains both an unshared and |
| a shared object, then there must be some reason that the |
| unshared object is unshared, and we don't want to start |
| providing a shared version of it. In particular, this solves |
| a bug involving the _savefNN set of functions. gcc will call |
| those functions without providing a slot to restore the TOC, |
| so it is essential that these functions be linked in directly |
| and not from a shared object, which means that a shared |
| object which also happens to link them in must not export |
| them. This is confusing, but I haven't been able to think of |
| a different approach. Note that the symbols can, of course, |
| be exported explicitly. */ |
| export = true; |
| if ((h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| && h->root.u.def.section->owner != NULL |
| && h->root.u.def.section->owner->my_archive != NULL) |
| { |
| bfd *arbfd, *member; |
| |
| arbfd = h->root.u.def.section->owner->my_archive; |
| member = bfd_openr_next_archived_file (arbfd, (bfd *) NULL); |
| while (member != NULL) |
| { |
| if ((member->flags & DYNAMIC) != 0) |
| { |
| export = false; |
| break; |
| } |
| member = bfd_openr_next_archived_file (arbfd, member); |
| } |
| } |
| |
| if (export) |
| h->flags |= XCOFF_EXPORT; |
| } |
| |
| /* We don't want to garbage collect symbols which are not defined in |
| XCOFF files. This is a convenient place to mark them. */ |
| if (xcoff_hash_table (ldinfo->info)->gc |
| && (h->flags & XCOFF_MARK) == 0 |
| && (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| && (h->root.u.def.section->owner == NULL |
| || (h->root.u.def.section->owner->xvec |
| != ldinfo->info->hash->creator))) |
| h->flags |= XCOFF_MARK; |
| |
| /* If this symbol is called and defined in a dynamic object, or it |
| is imported, then we need to set up global linkage code for it. |
| (Unless we did garbage collection and we didn't need this |
| symbol.) */ |
| if ((h->flags & XCOFF_CALLED) != 0 |
| && (h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak) |
| && h->root.root.string[0] == '.' |
| && h->descriptor != NULL |
| && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0 |
| || ((h->descriptor->flags & XCOFF_IMPORT) != 0 |
| && (h->descriptor->flags & XCOFF_DEF_REGULAR) == 0)) |
| && (! xcoff_hash_table (ldinfo->info)->gc |
| || (h->flags & XCOFF_MARK) != 0)) |
| { |
| asection *sec; |
| struct xcoff_link_hash_entry *hds; |
| |
| sec = xcoff_hash_table (ldinfo->info)->linkage_section; |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = sec; |
| h->root.u.def.value = sec->_raw_size; |
| h->smclas = XMC_GL; |
| h->flags |= XCOFF_DEF_REGULAR; |
| sec->_raw_size += XCOFF_GLINK_SIZE; |
| |
| /* The global linkage code requires a TOC entry for the |
| descriptor. */ |
| hds = h->descriptor; |
| BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined |
| || hds->root.type == bfd_link_hash_undefweak) |
| && (hds->flags & XCOFF_DEF_REGULAR) == 0); |
| hds->flags |= XCOFF_MARK; |
| if (hds->toc_section == NULL) |
| { |
| hds->toc_section = xcoff_hash_table (ldinfo->info)->toc_section; |
| hds->u.toc_offset = hds->toc_section->_raw_size; |
| hds->toc_section->_raw_size += 4; |
| ++xcoff_hash_table (ldinfo->info)->ldrel_count; |
| ++hds->toc_section->reloc_count; |
| hds->indx = -2; |
| hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL; |
| |
| /* We need to call xcoff_build_ldsyms recursively here, |
| because we may already have passed hds on the traversal. */ |
| xcoff_build_ldsyms (hds, p); |
| } |
| } |
| |
| /* If this symbol is exported, but not defined, we need to try to |
| define it. */ |
| if ((h->flags & XCOFF_EXPORT) != 0 |
| && (h->flags & XCOFF_IMPORT) == 0 |
| && (h->flags & XCOFF_DEF_REGULAR) == 0 |
| && (h->flags & XCOFF_DEF_DYNAMIC) == 0 |
| && (h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak)) |
| { |
| if ((h->flags & XCOFF_DESCRIPTOR) != 0 |
| && (h->descriptor->root.type == bfd_link_hash_defined |
| || h->descriptor->root.type == bfd_link_hash_defweak)) |
| { |
| asection *sec; |
| |
| /* This is an undefined function descriptor associated with |
| a defined entry point. We can build up a function |
| descriptor ourselves. Believe it or not, the AIX linker |
| actually does this, and there are cases where we need to |
| do it as well. */ |
| sec = xcoff_hash_table (ldinfo->info)->descriptor_section; |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = sec; |
| h->root.u.def.value = sec->_raw_size; |
| h->smclas = XMC_DS; |
| h->flags |= XCOFF_DEF_REGULAR; |
| sec->_raw_size += 12; |
| |
| /* A function descriptor uses two relocs: one for the |
| associated code, and one for the TOC address. */ |
| xcoff_hash_table (ldinfo->info)->ldrel_count += 2; |
| sec->reloc_count += 2; |
| |
| /* We handle writing out the contents of the descriptor in |
| xcoff_write_global_symbol. */ |
| } |
| else |
| { |
| (*_bfd_error_handler) |
| (_("warning: attempt to export undefined symbol `%s'"), |
| h->root.root.string); |
| h->ldsym = NULL; |
| return true; |
| } |
| } |
| |
| /* If this is still a common symbol, and it wasn't garbage |
| collected, we need to actually allocate space for it in the .bss |
| section. */ |
| if (h->root.type == bfd_link_hash_common |
| && (! xcoff_hash_table (ldinfo->info)->gc |
| || (h->flags & XCOFF_MARK) != 0) |
| && h->root.u.c.p->section->_raw_size == 0) |
| { |
| BFD_ASSERT (bfd_is_com_section (h->root.u.c.p->section)); |
| h->root.u.c.p->section->_raw_size = h->root.u.c.size; |
| } |
| |
| /* We need to add a symbol to the .loader section if it is mentioned |
| in a reloc which we are copying to the .loader section and it was |
| not defined or common, or if it is the entry point, or if it is |
| being exported. */ |
| |
| if (((h->flags & XCOFF_LDREL) == 0 |
| || h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak |
| || h->root.type == bfd_link_hash_common) |
| && (h->flags & XCOFF_ENTRY) == 0 |
| && (h->flags & XCOFF_EXPORT) == 0) |
| { |
| h->ldsym = NULL; |
| return true; |
| } |
| |
| /* We don't need to add this symbol if we did garbage collection and |
| we did not mark this symbol. */ |
| if (xcoff_hash_table (ldinfo->info)->gc |
| && (h->flags & XCOFF_MARK) == 0) |
| { |
| h->ldsym = NULL; |
| return true; |
| } |
| |
| /* We may have already processed this symbol due to the recursive |
| call above. */ |
| if ((h->flags & XCOFF_BUILT_LDSYM) != 0) |
| return true; |
| |
| /* We need to add this symbol to the .loader symbols. */ |
| |
| BFD_ASSERT (h->ldsym == NULL); |
| h->ldsym = ((struct internal_ldsym *) |
| bfd_zalloc (ldinfo->output_bfd, |
| sizeof (struct internal_ldsym))); |
| if (h->ldsym == NULL) |
| { |
| ldinfo->failed = true; |
| return false; |
| } |
| |
| if ((h->flags & XCOFF_IMPORT) != 0) |
| h->ldsym->l_ifile = h->ldindx; |
| |
| /* The first 3 symbol table indices are reserved to indicate the |
| sections. */ |
| h->ldindx = ldinfo->ldsym_count + 3; |
| |
| ++ldinfo->ldsym_count; |
| |
| len = strlen (h->root.root.string); |
| if (len <= SYMNMLEN) |
| strncpy (h->ldsym->_l._l_name, h->root.root.string, SYMNMLEN); |
| else |
| { |
| if (ldinfo->string_size + len + 3 > ldinfo->string_alc) |
| { |
| size_t newalc; |
| bfd_byte *newstrings; |
| |
| newalc = ldinfo->string_alc * 2; |
| if (newalc == 0) |
| newalc = 32; |
| while (ldinfo->string_size + len + 3 > newalc) |
| newalc *= 2; |
| |
| newstrings = ((bfd_byte *) |
| bfd_realloc ((PTR) ldinfo->strings, newalc)); |
| if (newstrings == NULL) |
| { |
| ldinfo->failed = true; |
| return false; |
| } |
| ldinfo->string_alc = newalc; |
| ldinfo->strings = newstrings; |
| } |
| |
| bfd_put_16 (ldinfo->output_bfd, len + 1, |
| ldinfo->strings + ldinfo->string_size); |
| strcpy (ldinfo->strings + ldinfo->string_size + 2, h->root.root.string); |
| h->ldsym->_l._l_l._l_zeroes = 0; |
| h->ldsym->_l._l_l._l_offset = ldinfo->string_size + 2; |
| ldinfo->string_size += len + 3; |
| } |
| |
| h->flags |= XCOFF_BUILT_LDSYM; |
| |
| return true; |
| } |
| |
| /* Do the final link step. */ |
| |
| boolean |
| _bfd_xcoff_bfd_final_link (abfd, info) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| { |
| bfd_size_type symesz; |
| struct xcoff_final_link_info finfo; |
| asection *o; |
| struct bfd_link_order *p; |
| size_t max_contents_size; |
| size_t max_sym_count; |
| size_t max_lineno_count; |
| size_t max_reloc_count; |
| size_t max_output_reloc_count; |
| file_ptr rel_filepos; |
| unsigned int relsz; |
| file_ptr line_filepos; |
| unsigned int linesz; |
| bfd *sub; |
| bfd_byte *external_relocs = NULL; |
| char strbuf[STRING_SIZE_SIZE]; |
| |
| if (info->shared) |
| abfd->flags |= DYNAMIC; |
| |
| symesz = bfd_coff_symesz (abfd); |
| |
| finfo.info = info; |
| finfo.output_bfd = abfd; |
| finfo.strtab = NULL; |
| finfo.section_info = NULL; |
| finfo.last_file_index = -1; |
| finfo.toc_symindx = -1; |
| finfo.internal_syms = NULL; |
| finfo.sym_indices = NULL; |
| finfo.outsyms = NULL; |
| finfo.linenos = NULL; |
| finfo.contents = NULL; |
| finfo.external_relocs = NULL; |
| |
| finfo.ldsym = ((struct external_ldsym *) |
| (xcoff_hash_table (info)->loader_section->contents |
| + LDHDRSZ)); |
| finfo.ldrel = ((struct external_ldrel *) |
| (xcoff_hash_table (info)->loader_section->contents |
| + LDHDRSZ |
| + xcoff_hash_table (info)->ldhdr.l_nsyms * LDSYMSZ)); |
| |
| xcoff_data (abfd)->coff.link_info = info; |
| |
| finfo.strtab = _bfd_stringtab_init (); |
| if (finfo.strtab == NULL) |
| goto error_return; |
| |
| /* Count the line number and relocation entries required for the |
| output file. Determine a few maximum sizes. */ |
| max_contents_size = 0; |
| max_lineno_count = 0; |
| max_reloc_count = 0; |
| for (o = abfd->sections; o != NULL; o = o->next) |
| { |
| o->reloc_count = 0; |
| o->lineno_count = 0; |
| for (p = o->link_order_head; p != NULL; p = p->next) |
| { |
| if (p->type == bfd_indirect_link_order) |
| { |
| asection *sec; |
| |
| sec = p->u.indirect.section; |
| |
| /* Mark all sections which are to be included in the |
| link. This will normally be every section. We need |
| to do this so that we can identify any sections which |
| the linker has decided to not include. */ |
| sec->linker_mark = true; |
| |
| if (info->strip == strip_none |
| || info->strip == strip_some) |
| o->lineno_count += sec->lineno_count; |
| |
| o->reloc_count += sec->reloc_count; |
| |
| if (sec->_raw_size > max_contents_size) |
| max_contents_size = sec->_raw_size; |
| if (sec->lineno_count > max_lineno_count) |
| max_lineno_count = sec->lineno_count; |
| if (coff_section_data (sec->owner, sec) != NULL |
| && xcoff_section_data (sec->owner, sec) != NULL |
| && (xcoff_section_data (sec->owner, sec)->lineno_count |
| > max_lineno_count)) |
| max_lineno_count = |
| xcoff_section_data (sec->owner, sec)->lineno_count; |
| if (sec->reloc_count > max_reloc_count) |
| max_reloc_count = sec->reloc_count; |
| } |
| else if (p->type == bfd_section_reloc_link_order |
| || p->type == bfd_symbol_reloc_link_order) |
| ++o->reloc_count; |
| } |
| } |
| |
| /* Compute the file positions for all the sections. */ |
| if (abfd->output_has_begun) |
| { |
| if (xcoff_hash_table (info)->file_align != 0) |
| abort (); |
| } |
| else |
| { |
| bfd_vma file_align; |
| |
| file_align = xcoff_hash_table (info)->file_align; |
| if (file_align != 0) |
| { |
| boolean saw_contents; |
| int indx; |
| asection **op; |
| file_ptr sofar; |
| |
| /* Insert .pad sections before every section which has |
| contents and is loaded, if it is preceded by some other |
| section which has contents and is loaded. */ |
| saw_contents = true; |
| for (op = &abfd->sections; *op != NULL; op = &(*op)->next) |
| { |
| if (strcmp ((*op)->name, ".pad") == 0) |
| saw_contents = false; |
| else if (((*op)->flags & SEC_HAS_CONTENTS) != 0 |
| && ((*op)->flags & SEC_LOAD) != 0) |
| { |
| if (! saw_contents) |
| saw_contents = true; |
| else |
| { |
| asection *n, *hold; |
| |
| hold = *op; |
| *op = NULL; |
| n = bfd_make_section_anyway (abfd, ".pad"); |
| BFD_ASSERT (*op == n); |
| n->next = hold; |
| n->flags = SEC_HAS_CONTENTS; |
| n->alignment_power = 0; |
| saw_contents = false; |
| } |
| } |
| } |
| |
| /* Reset the section indices after inserting the new |
| sections. */ |
| indx = 0; |
| for (o = abfd->sections; o != NULL; o = o->next) |
| { |
| ++indx; |
| o->target_index = indx; |
| } |
| BFD_ASSERT ((unsigned int) indx == abfd->section_count); |
| |
| /* Work out appropriate sizes for the .pad sections to force |
| each section to land on a page boundary. This bit of |
| code knows what compute_section_file_positions is going |
| to do. */ |
| sofar = bfd_coff_filhsz (abfd); |
| sofar += bfd_coff_aoutsz (abfd); |
| sofar += abfd->section_count * bfd_coff_scnhsz (abfd); |
| for (o = abfd->sections; o != NULL; o = o->next) |
| if (o->reloc_count >= 0xffff || o->lineno_count >= 0xffff) |
| sofar += bfd_coff_scnhsz (abfd); |
| |
| for (o = abfd->sections; o != NULL; o = o->next) |
| { |
| if (strcmp (o->name, ".pad") == 0) |
| { |
| bfd_vma pageoff; |
| |
| BFD_ASSERT (o->_raw_size == 0); |
| pageoff = sofar & (file_align - 1); |
| if (pageoff != 0) |
| { |
| o->_raw_size = file_align - pageoff; |
| sofar += file_align - pageoff; |
| o->flags |= SEC_HAS_CONTENTS; |
| } |
| } |
| else |
| { |
| if ((o->flags & SEC_HAS_CONTENTS) != 0) |
| sofar += BFD_ALIGN (o->_raw_size, |
| 1 << o->alignment_power); |
| } |
| } |
| } |
| |
| if (! bfd_coff_compute_section_file_positions (abfd)) |
| goto error_return; |
| } |
| |
| /* Allocate space for the pointers we need to keep for the relocs. */ |
| { |
| unsigned int i; |
| |
| /* We use section_count + 1, rather than section_count, because |
| the target_index fields are 1 based. */ |
| finfo.section_info = |
| ((struct xcoff_link_section_info *) |
| bfd_malloc ((abfd->section_count + 1) |
| * sizeof (struct xcoff_link_section_info))); |
| if (finfo.section_info == NULL) |
| goto error_return; |
| for (i = 0; i <= abfd->section_count; i++) |
| { |
| finfo.section_info[i].relocs = NULL; |
| finfo.section_info[i].rel_hashes = NULL; |
| finfo.section_info[i].toc_rel_hashes = NULL; |
| } |
| } |
| |
| /* Set the file positions for the relocs. */ |
| rel_filepos = obj_relocbase (abfd); |
| relsz = bfd_coff_relsz (abfd); |
| max_output_reloc_count = 0; |
| for (o = abfd->sections; o != NULL; o = o->next) |
| { |
| if (o->reloc_count == 0) |
| o->rel_filepos = 0; |
| else |
| { |
| /* A stripped file has no relocs. However, we still |
| allocate the buffers, so that later code doesn't have to |
| worry about whether we are stripping or not. */ |
| if (info->strip == strip_all) |
| o->rel_filepos = 0; |
| else |
| { |
| o->flags |= SEC_RELOC; |
| o->rel_filepos = rel_filepos; |
| rel_filepos += o->reloc_count * relsz; |
| } |
| |
| /* We don't know the indices of global symbols until we have |
| written out all the local symbols. For each section in |
| the output file, we keep an array of pointers to hash |
| table entries. Each entry in the array corresponds to a |
| reloc. When we find a reloc against a global symbol, we |
| set the corresponding entry in this array so that we can |
| fix up the symbol index after we have written out all the |
| local symbols. |
| |
| Because of this problem, we also keep the relocs in |
| memory until the end of the link. This wastes memory. |
| We could backpatch the file later, I suppose, although it |
| would be slow. */ |
| finfo.section_info[o->target_index].relocs = |
| ((struct internal_reloc *) |
| bfd_malloc (o->reloc_count * sizeof (struct internal_reloc))); |
| finfo.section_info[o->target_index].rel_hashes = |
| ((struct xcoff_link_hash_entry **) |
| bfd_malloc (o->reloc_count |
| * sizeof (struct xcoff_link_hash_entry *))); |
| if (finfo.section_info[o->target_index].relocs == NULL |
| || finfo.section_info[o->target_index].rel_hashes == NULL) |
| goto error_return; |
| |
| if (o->reloc_count > max_output_reloc_count) |
| max_output_reloc_count = o->reloc_count; |
| } |
| } |
| |
| /* We now know the size of the relocs, so we can determine the file |
| positions of the line numbers. */ |
| line_filepos = rel_filepos; |
| finfo.line_filepos = line_filepos; |
| linesz = bfd_coff_linesz (abfd); |
| for (o = abfd->sections; o != NULL; o = o->next) |
| { |
| if (o->lineno_count == 0) |
| o->line_filepos = 0; |
| else |
| { |
| o->line_filepos = line_filepos; |
| line_filepos += o->lineno_count * linesz; |
| } |
| |
| /* Reset the reloc and lineno counts, so that we can use them to |
| count the number of entries we have output so far. */ |
| o->reloc_count = 0; |
| o->lineno_count = 0; |
| } |
| |
| obj_sym_filepos (abfd) = line_filepos; |
| |
| /* Figure out the largest number of symbols in an input BFD. Take |
| the opportunity to clear the output_has_begun fields of all the |
| input BFD's. We want at least 6 symbols, since that is the |
| number which xcoff_write_global_symbol may need. */ |
| max_sym_count = 6; |
| for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
| { |
| size_t sz; |
| |
| sub->output_has_begun = false; |
| sz = obj_raw_syment_count (sub); |
| if (sz > max_sym_count) |
| max_sym_count = sz; |
| } |
| |
| /* Allocate some buffers used while linking. */ |
| finfo.internal_syms = ((struct internal_syment *) |
| bfd_malloc (max_sym_count |
| * sizeof (struct internal_syment))); |
| finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long)); |
| finfo.outsyms = ((bfd_byte *) |
| bfd_malloc ((size_t) ((max_sym_count + 1) * symesz))); |
| finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count |
| * bfd_coff_linesz (abfd)); |
| finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
| finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz); |
| if ((finfo.internal_syms == NULL && max_sym_count > 0) |
| || (finfo.sym_indices == NULL && max_sym_count > 0) |
| || finfo.outsyms == NULL |
| || (finfo.linenos == NULL && max_lineno_count > 0) |
| || (finfo.contents == NULL && max_contents_size > 0) |
| || (finfo.external_relocs == NULL && max_reloc_count > 0)) |
| goto error_return; |
| |
| obj_raw_syment_count (abfd) = 0; |
| xcoff_data (abfd)->toc = (bfd_vma) -1; |
| |
| /* We now know the position of everything in the file, except that |
| we don't know the size of the symbol table and therefore we don't |
| know where the string table starts. We just build the string |
| table in memory as we go along. We process all the relocations |
| for a single input file at once. */ |
| for (o = abfd->sections; o != NULL; o = o->next) |
| { |
| for (p = o->link_order_head; p != NULL; p = p->next) |
| { |
| if (p->type == bfd_indirect_link_order |
| && p->u.indirect.section->owner->xvec == abfd->xvec) |
| { |
| sub = p->u.indirect.section->owner; |
| if (! sub->output_has_begun) |
| { |
| if (! xcoff_link_input_bfd (&finfo, sub)) |
| goto error_return; |
| sub->output_has_begun = true; |
| } |
| } |
| else if (p->type == bfd_section_reloc_link_order |
| || p->type == bfd_symbol_reloc_link_order) |
| { |
| if (! xcoff_reloc_link_order (abfd, &finfo, o, p)) |
| goto error_return; |
| } |
| else |
| { |
| if (! _bfd_default_link_order (abfd, info, o, p)) |
| goto error_return; |
| } |
| } |
| } |
| |
| /* Free up the buffers used by xcoff_link_input_bfd. */ |
| |
| if (finfo.internal_syms != NULL) |
| { |
| free (finfo.internal_syms); |
| finfo.internal_syms = NULL; |
| } |
| if (finfo.sym_indices != NULL) |
| { |
| free (finfo.sym_indices); |
| finfo.sym_indices = NULL; |
| } |
| if (finfo.linenos != NULL) |
| { |
| free (finfo.linenos); |
| finfo.linenos = NULL; |
| } |
| if (finfo.contents != NULL) |
| { |
| free (finfo.contents); |
| finfo.contents = NULL; |
| } |
| if (finfo.external_relocs != NULL) |
| { |
| free (finfo.external_relocs); |
| finfo.external_relocs = NULL; |
| } |
| |
| /* The value of the last C_FILE symbol is supposed to be -1. Write |
| it out again. */ |
| if (finfo.last_file_index != -1) |
| { |
| finfo.last_file.n_value = -1; |
| bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file, |
| (PTR) finfo.outsyms); |
| if (bfd_seek (abfd, |
| (obj_sym_filepos (abfd) |
| + finfo.last_file_index * symesz), |
| SEEK_SET) != 0 |
| || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz) |
| goto error_return; |
| } |
| |
| /* Write out all the global symbols which do not come from XCOFF |
| input files. */ |
| xcoff_link_hash_traverse (xcoff_hash_table (info), |
| xcoff_write_global_symbol, |
| (PTR) &finfo); |
| |
| if (finfo.outsyms != NULL) |
| { |
| free (finfo.outsyms); |
| finfo.outsyms = NULL; |
| } |
| |
| /* Now that we have written out all the global symbols, we know the |
| symbol indices to use for relocs against them, and we can finally |
| write out the relocs. */ |
| external_relocs = (bfd_byte *) bfd_malloc (max_output_reloc_count * relsz); |
| if (external_relocs == NULL && max_output_reloc_count != 0) |
| goto error_return; |
| |
| for (o = abfd->sections; o != NULL; o = o->next) |
| { |
| struct internal_reloc *irel; |
| struct internal_reloc *irelend; |
| struct xcoff_link_hash_entry **rel_hash; |
| struct xcoff_toc_rel_hash *toc_rel_hash; |
| bfd_byte *erel; |
| |
| /* A stripped file has no relocs. */ |
| if (info->strip == strip_all) |
| { |
| o->reloc_count = 0; |
| continue; |
| } |
| |
| if (o->reloc_count == 0) |
| continue; |
| |
| irel = finfo.section_info[o->target_index].relocs; |
| irelend = irel + o->reloc_count; |
| rel_hash = finfo.section_info[o->target_index].rel_hashes; |
| for (; irel < irelend; irel++, rel_hash++, erel += relsz) |
| { |
| if (*rel_hash != NULL) |
| { |
| if ((*rel_hash)->indx < 0) |
| { |
| if (! ((*info->callbacks->unattached_reloc) |
| (info, (*rel_hash)->root.root.string, |
| (bfd *) NULL, o, irel->r_vaddr))) |
| goto error_return; |
| (*rel_hash)->indx = 0; |
| } |
| irel->r_symndx = (*rel_hash)->indx; |
| } |
| } |
| |
| for (toc_rel_hash = finfo.section_info[o->target_index].toc_rel_hashes; |
| toc_rel_hash != NULL; |
| toc_rel_hash = toc_rel_hash->next) |
| { |
| if (toc_rel_hash->h->u.toc_indx < 0) |
| { |
| if (! ((*info->callbacks->unattached_reloc) |
| (info, toc_rel_hash->h->root.root.string, |
| (bfd *) NULL, o, toc_rel_hash->rel->r_vaddr))) |
| goto error_return; |
| toc_rel_hash->h->u.toc_indx = 0; |
| } |
| toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx; |
| } |
| |
| /* XCOFF requires that the relocs be sorted by address. We tend |
| to produce them in the order in which their containing csects |
| appear in the symbol table, which is not necessarily by |
| address. So we sort them here. There may be a better way to |
| do this. */ |
| qsort ((PTR) finfo.section_info[o->target_index].relocs, |
| o->reloc_count, sizeof (struct internal_reloc), |
| xcoff_sort_relocs); |
| |
| irel = finfo.section_info[o->target_index].relocs; |
| irelend = irel + o->reloc_count; |
| erel = external_relocs; |
| for (; irel < irelend; irel++, rel_hash++, erel += relsz) |
| bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel); |
| |
| if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0 |
| || bfd_write ((PTR) external_relocs, relsz, o->reloc_count, |
| abfd) != relsz * o->reloc_count) |
| goto error_return; |
| } |
| |
| if (external_relocs != NULL) |
| { |
| free (external_relocs); |
| external_relocs = NULL; |
| } |
| |
| /* Free up the section information. */ |
| if (finfo.section_info != NULL) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < abfd->section_count; i++) |
| { |
| if (finfo.section_info[i].relocs != NULL) |
| free (finfo.section_info[i].relocs); |
| if (finfo.section_info[i].rel_hashes != NULL) |
| free (finfo.section_info[i].rel_hashes); |
| } |
| free (finfo.section_info); |
| finfo.section_info = NULL; |
| } |
| |
| /* Write out the loader section contents. */ |
| BFD_ASSERT ((bfd_byte *) finfo.ldrel |
| == (xcoff_hash_table (info)->loader_section->contents |
| + xcoff_hash_table (info)->ldhdr.l_impoff)); |
| o = xcoff_hash_table (info)->loader_section; |
| if (! bfd_set_section_contents (abfd, o->output_section, |
| o->contents, o->output_offset, |
| o->_raw_size)) |
| goto error_return; |
| |
| /* Write out the magic sections. */ |
| o = xcoff_hash_table (info)->linkage_section; |
| if (o->_raw_size > 0 |
| && ! bfd_set_section_contents (abfd, o->output_section, o->contents, |
| o->output_offset, o->_raw_size)) |
| goto error_return; |
| o = xcoff_hash_table (info)->toc_section; |
| if (o->_raw_size > 0 |
| && ! bfd_set_section_contents (abfd, o->output_section, o->contents, |
| o->output_offset, o->_raw_size)) |
| goto error_return; |
| o = xcoff_hash_table (info)->descriptor_section; |
| if (o->_raw_size > 0 |
| && ! bfd_set_section_contents (abfd, o->output_section, o->contents, |
| o->output_offset, o->_raw_size)) |
| goto error_return; |
| |
| /* Write out the string table. */ |
| if (bfd_seek (abfd, |
| (obj_sym_filepos (abfd) |
| + obj_raw_syment_count (abfd) * symesz), |
| SEEK_SET) != 0) |
| goto error_return; |
| bfd_h_put_32 (abfd, |
| _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE, |
| (bfd_byte *) strbuf); |
| if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE) |
| goto error_return; |
| if (! _bfd_stringtab_emit (abfd, finfo.strtab)) |
| goto error_return; |
| |
| _bfd_stringtab_free (finfo.strtab); |
| |
| /* Write out the debugging string table. */ |
| o = xcoff_hash_table (info)->debug_section; |
| if (o != NULL) |
| { |
| struct bfd_strtab_hash *debug_strtab; |
| |
| debug_strtab = xcoff_hash_table (info)->debug_strtab; |
| BFD_ASSERT (o->output_section->_raw_size - o->output_offset |
| >= _bfd_stringtab_size (debug_strtab)); |
| if (bfd_seek (abfd, |
| o->output_section->filepos + o->output_offset, |
| SEEK_SET) != 0) |
| goto error_return; |
| if (! _bfd_stringtab_emit (abfd, debug_strtab)) |
| goto error_return; |
| } |
| |
| /* Setting bfd_get_symcount to 0 will cause write_object_contents to |
| not try to write out the symbols. */ |
| bfd_get_symcount (abfd) = 0; |
| |
| return true; |
| |
| error_return: |
| if (finfo.strtab != NULL) |
| _bfd_stringtab_free (finfo.strtab); |
| if (finfo.section_info != NULL) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < abfd->section_count; i++) |
| { |
| if (finfo.section_info[i].relocs != NULL) |
| free (finfo.section_info[i].relocs); |
| if (finfo.section_info[i].rel_hashes != NULL) |
| free (finfo.section_info[i].rel_hashes); |
| } |
| free (finfo.section_info); |
| } |
| if (finfo.internal_syms != NULL) |
| free (finfo.internal_syms); |
| if (finfo.sym_indices != NULL) |
| free (finfo.sym_indices); |
| if (finfo.outsyms != NULL) |
| free (finfo.outsyms); |
| if (finfo.linenos != NULL) |
| free (finfo.linenos); |
| if (finfo.contents != NULL) |
| free (finfo.contents); |
| if (finfo.external_relocs != NULL) |
| free (finfo.external_relocs); |
| if (external_relocs != NULL) |
| free (external_relocs); |
| return false; |
| } |
| |
| /* Link an input file into the linker output file. This function |
| handles all the sections and relocations of the input file at once. */ |
| |
| static boolean |
| xcoff_link_input_bfd (finfo, input_bfd) |
| struct xcoff_final_link_info *finfo; |
| bfd *input_bfd; |
| { |
| bfd *output_bfd; |
| const char *strings; |
| bfd_size_type syment_base; |
| unsigned int n_tmask; |
| unsigned int n_btshft; |
| boolean copy, hash; |
| bfd_size_type isymesz; |
| bfd_size_type osymesz; |
| bfd_size_type linesz; |
| bfd_byte *esym; |
| bfd_byte *esym_end; |
| struct xcoff_link_hash_entry **sym_hash; |
| struct internal_syment *isymp; |
| asection **csectpp; |
| unsigned long *debug_index; |
| long *indexp; |
| unsigned long output_index; |
| bfd_byte *outsym; |
| unsigned int incls; |
| asection *oline; |
| boolean keep_syms; |
| asection *o; |
| |
| /* We can just skip DYNAMIC files, unless this is a static link. */ |
| if ((input_bfd->flags & DYNAMIC) != 0 |
| && ! finfo->info->static_link) |
| return true; |
| |
| /* Move all the symbols to the output file. */ |
| |
| output_bfd = finfo->output_bfd; |
| strings = NULL; |
| syment_base = obj_raw_syment_count (output_bfd); |
| isymesz = bfd_coff_symesz (input_bfd); |
| osymesz = bfd_coff_symesz (output_bfd); |
| linesz = bfd_coff_linesz (input_bfd); |
| BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd)); |
| |
| n_tmask = coff_data (input_bfd)->local_n_tmask; |
| n_btshft = coff_data (input_bfd)->local_n_btshft; |
| |
| /* Define macros so that ISFCN, et. al., macros work correctly. */ |
| #define N_TMASK n_tmask |
| #define N_BTSHFT n_btshft |
| |
| copy = false; |
| if (! finfo->info->keep_memory) |
| copy = true; |
| hash = true; |
| if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) |
| hash = false; |
| |
| if (! _bfd_coff_get_external_symbols (input_bfd)) |
| return false; |
| |
| esym = (bfd_byte *) obj_coff_external_syms (input_bfd); |
| esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; |
| sym_hash = obj_xcoff_sym_hashes (input_bfd); |
| csectpp = xcoff_data (input_bfd)->csects; |
| debug_index = xcoff_data (input_bfd)->debug_indices; |
| isymp = finfo->internal_syms; |
| indexp = finfo->sym_indices; |
| output_index = syment_base; |
| outsym = finfo->outsyms; |
| incls = 0; |
| oline = NULL; |
| |
| while (esym < esym_end) |
| { |
| struct internal_syment isym; |
| union internal_auxent aux; |
| int smtyp = 0; |
| boolean skip; |
| boolean require; |
| int add; |
| |
| bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp); |
| |
| /* If this is a C_EXT or C_HIDEXT symbol, we need the csect |
| information. */ |
| if (isymp->n_sclass == C_EXT || isymp->n_sclass == C_HIDEXT) |
| { |
| BFD_ASSERT (isymp->n_numaux > 0); |
| bfd_coff_swap_aux_in (input_bfd, |
| (PTR) (esym + isymesz * isymp->n_numaux), |
| isymp->n_type, isymp->n_sclass, |
| isymp->n_numaux - 1, isymp->n_numaux, |
| (PTR) &aux); |
| smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp); |
| } |
| |
| /* Make a copy of *isymp so that the relocate_section function |
| always sees the original values. This is more reliable than |
| always recomputing the symbol value even if we are stripping |
| the symbol. */ |
| isym = *isymp; |
| |
| /* If this symbol is in the .loader section, swap out the |
| .loader symbol information. If this is an external symbol |
| reference to a defined symbol, though, then wait until we get |
| to the definition. */ |
| if (isym.n_sclass == C_EXT |
| && *sym_hash != NULL |
| && (*sym_hash)->ldsym != NULL |
| && (smtyp != XTY_ER |
| || (*sym_hash)->root.type == bfd_link_hash_undefined)) |
| { |
| struct xcoff_link_hash_entry *h; |
| struct internal_ldsym *ldsym; |
| |
| h = *sym_hash; |
| ldsym = h->ldsym; |
| if (isym.n_scnum > 0) |
| { |
| ldsym->l_scnum = (*csectpp)->output_section->target_index; |
| ldsym->l_value = (isym.n_value |
| + (*csectpp)->output_section->vma |
| + (*csectpp)->output_offset |
| - (*csectpp)->vma); |
| } |
| else |
| { |
| ldsym->l_scnum = isym.n_scnum; |
| ldsym->l_value = isym.n_value; |
| } |
| |
| ldsym->l_smtype = smtyp; |
| if (((h->flags & XCOFF_DEF_REGULAR) == 0 |
| && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| || (h->flags & XCOFF_IMPORT) != 0) |
| ldsym->l_smtype |= L_IMPORT; |
| if (((h->flags & XCOFF_DEF_REGULAR) != 0 |
| && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| || (h->flags & XCOFF_EXPORT) != 0) |
| ldsym->l_smtype |= L_EXPORT; |
| if ((h->flags & XCOFF_ENTRY) != 0) |
| ldsym->l_smtype |= L_ENTRY; |
| |
| ldsym->l_smclas = aux.x_csect.x_smclas; |
| |
| if (ldsym->l_ifile == (bfd_size_type) -1) |
| ldsym->l_ifile = 0; |
| else if (ldsym->l_ifile == 0) |
| { |
| if ((ldsym->l_smtype & L_IMPORT) == 0) |
| ldsym->l_ifile = 0; |
| else |
| { |
| bfd *impbfd; |
| |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| impbfd = h->root.u.def.section->owner; |
| else if (h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak) |
| impbfd = h->root.u.undef.abfd; |
| else |
| impbfd = NULL; |
| |
| if (impbfd == NULL) |
| ldsym->l_ifile = 0; |
| else |
| { |
| BFD_ASSERT (impbfd->xvec == finfo->output_bfd->xvec); |
| ldsym->l_ifile = xcoff_data (impbfd)->import_file_id; |
| } |
| } |
| } |
| |
| ldsym->l_parm = 0; |
| |
| BFD_ASSERT (h->ldindx >= 0); |
| BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym)); |
| xcoff_swap_ldsym_out (finfo->output_bfd, ldsym, |
| finfo->ldsym + h->ldindx - 3); |
| h->ldsym = NULL; |
| |
| /* Fill in snentry now that we know the target_index. */ |
| if ((h->flags & XCOFF_ENTRY) != 0 |
| && (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak)) |
| xcoff_data (output_bfd)->snentry = |
| h->root.u.def.section->output_section->target_index; |
| } |
| |
| *indexp = -1; |
| |
| skip = false; |
| require = false; |
| add = 1 + isym.n_numaux; |
| |
| /* If we are skipping this csect, we want to skip this symbol. */ |
| if (*csectpp == NULL) |
| skip = true; |
| |
| /* If we garbage collected this csect, we want to skip this |
| symbol. */ |
| if (! skip |
| && xcoff_hash_table (finfo->info)->gc |
| && ((*csectpp)->flags & SEC_MARK) == 0 |
| && *csectpp != bfd_abs_section_ptr) |
| skip = true; |
| |
| /* An XCOFF linker always skips C_STAT symbols. */ |
| if (! skip |
| && isymp->n_sclass == C_STAT) |
| skip = true; |
| |
| /* We skip all but the first TOC anchor. */ |
| if (! skip |
| && isymp->n_sclass == C_HIDEXT |
| && aux.x_csect.x_smclas == XMC_TC0) |
| { |
| if (finfo->toc_symindx != -1) |
| skip = true; |
| else |
| { |
| bfd_vma tocval, tocend; |
| |
| tocval = ((*csectpp)->output_section->vma |
| + (*csectpp)->output_offset |
| + isym.n_value |
| - (*csectpp)->vma); |
| /* We want to find out if tocval is a good value to use |
| as the TOC anchor--that is, whether we can access all |
| of the TOC using a 16 bit offset from tocval. This |
| test assumes that the TOC comes at the end of the |
| output section, as it does in the default linker |
| script. FIXME: This doesn't handle .tocbss sections |
| created from XMC_TD common symbols correctly. */ |
| |
| tocend = ((*csectpp)->output_section->vma |
| + (*csectpp)->output_section->_raw_size); |
| |
| if (tocval + 0x10000 < tocend) |
| { |
| (*_bfd_error_handler) |
| (_("TOC overflow: 0x%lx > 0x10000; try -mminimal-toc when compiling"), |
| (unsigned long) (tocend - tocval)); |
| bfd_set_error (bfd_error_file_too_big); |
| return false; |
| } |
| |
| if (tocval + 0x8000 < tocend) |
| { |
| bfd_vma tocadd; |
| |
| tocadd = tocend - (tocval + 0x8000); |
| tocval += tocadd; |
| isym.n_value += tocadd; |
| } |
| |
| finfo->toc_symindx = output_index; |
| xcoff_data (finfo->output_bfd)->toc = tocval; |
| xcoff_data (finfo->output_bfd)->sntoc = |
| (*csectpp)->output_section->target_index; |
| require = true; |
| } |
| } |
| |
| /* If we are stripping all symbols, we want to skip this one. */ |
| if (! skip |
| && finfo->info->strip == strip_all) |
| skip = true; |
| |
| /* We can skip resolved external references. */ |
| if (! skip |
| && isym.n_sclass == C_EXT |
| && smtyp == XTY_ER |
| && (*sym_hash)->root.type != bfd_link_hash_undefined) |
| skip = true; |
| |
| /* We can skip common symbols if they got defined somewhere |
| else. */ |
| if (! skip |
| && isym.n_sclass == C_EXT |
| && smtyp == XTY_CM |
| && ((*sym_hash)->root.type != bfd_link_hash_common |
| || (*sym_hash)->root.u.c.p->section != *csectpp) |
| && ((*sym_hash)->root.type != bfd_link_hash_defined |
| || (*sym_hash)->root.u.def.section != *csectpp)) |
| skip = true; |
| |
| /* Skip local symbols if we are discarding them. */ |
| if (! skip |
| && finfo->info->discard == discard_all |
| && isym.n_sclass != C_EXT |
| && (isym.n_sclass != C_HIDEXT |
| || smtyp != XTY_SD)) |
| skip = true; |
| |
| /* If we stripping debugging symbols, and this is a debugging |
| symbol, then skip it. */ |
| if (! skip |
| && finfo->info->strip == strip_debugger |
| && isym.n_scnum == N_DEBUG) |
| skip = true; |
| |
| /* If some symbols are stripped based on the name, work out the |
| name and decide whether to skip this symbol. We don't handle |
| this correctly for symbols whose names are in the .debug |
| section; to get it right we would need a new bfd_strtab_hash |
| function to return the string given the index. */ |
| if (! skip |
| && (finfo->info->strip == strip_some |
| || finfo->info->discard == discard_l) |
| && (debug_index == NULL || *debug_index == (unsigned long) -1)) |
| { |
| const char *name; |
| char buf[SYMNMLEN + 1]; |
| |
| name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf); |
| if (name == NULL) |
| return false; |
| |
| if ((finfo->info->strip == strip_some |
| && (bfd_hash_lookup (finfo->info->keep_hash, name, false, |
| false) == NULL)) |
| || (finfo->info->discard == discard_l |
| && (isym.n_sclass != C_EXT |
| && (isym.n_sclass != C_HIDEXT |
| || smtyp != XTY_SD)) |
| && bfd_is_local_label_name (input_bfd, name))) |
| skip = true; |
| } |
| |
| /* We can not skip the first TOC anchor. */ |
| if (skip |
| && require |
| && finfo->info->strip != strip_all) |
| skip = false; |
| |
| /* We now know whether we are to skip this symbol or not. */ |
| if (! skip) |
| { |
| /* Adjust the symbol in order to output it. */ |
| |
| if (isym._n._n_n._n_zeroes == 0 |
| && isym._n._n_n._n_offset != 0) |
| { |
| /* This symbol has a long name. Enter it in the string |
| table we are building. If *debug_index != -1, the |
| name has already been entered in the .debug section. */ |
| if (debug_index != NULL && *debug_index != (unsigned long) -1) |
| isym._n._n_n._n_offset = *debug_index; |
| else |
| { |
| const char *name; |
| bfd_size_type indx; |
| |
| name = _bfd_coff_internal_syment_name (input_bfd, &isym, |
| (char *) NULL); |
| if (name == NULL) |
| return false; |
| indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy); |
| if (indx == (bfd_size_type) -1) |
| return false; |
| isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; |
| } |
| } |
| |
| if (isym.n_sclass != C_BSTAT |
| && isym.n_sclass != C_ESTAT |
| && isym.n_sclass != C_DECL |
| && isym.n_scnum > 0) |
| { |
| isym.n_scnum = (*csectpp)->output_section->target_index; |
| isym.n_value += ((*csectpp)->output_section->vma |
| + (*csectpp)->output_offset |
| - (*csectpp)->vma); |
| } |
| |
| /* The value of a C_FILE symbol is the symbol index of the |
| next C_FILE symbol. The value of the last C_FILE symbol |
| is -1. We try to get this right, below, just before we |
| write the symbols out, but in the general case we may |
| have to write the symbol out twice. */ |
| if (isym.n_sclass == C_FILE) |
| { |
| if (finfo->last_file_index != -1 |
| && finfo->last_file.n_value != (long) output_index) |
| { |
| /* We must correct the value of the last C_FILE entry. */ |
| finfo->last_file.n_value = output_index; |
| if ((bfd_size_type) finfo->last_file_index >= syment_base) |
| { |
| /* The last C_FILE symbol is in this input file. */ |
| bfd_coff_swap_sym_out (output_bfd, |
| (PTR) &finfo->last_file, |
| (PTR) (finfo->outsyms |
| + ((finfo->last_file_index |
| - syment_base) |
| * osymesz))); |
| } |
| else |
| { |
| /* We have already written out the last C_FILE |
| symbol. We need to write it out again. We |
| borrow *outsym temporarily. */ |
| bfd_coff_swap_sym_out (output_bfd, |
| (PTR) &finfo->last_file, |
| (PTR) outsym); |
| if (bfd_seek (output_bfd, |
| (obj_sym_filepos (output_bfd) |
| + finfo->last_file_index * osymesz), |
| SEEK_SET) != 0 |
| || (bfd_write (outsym, osymesz, 1, output_bfd) |
| != osymesz)) |
| return false; |
| } |
| } |
| |
| finfo->last_file_index = output_index; |
| finfo->last_file = isym; |
| } |
| |
| /* The value of a C_BINCL or C_EINCL symbol is a file offset |
| into the line numbers. We update the symbol values when |
| we handle the line numbers. */ |
| if (isym.n_sclass == C_BINCL |
| || isym.n_sclass == C_EINCL) |
| { |
| isym.n_value = finfo->line_filepos; |
| ++incls; |
| } |
| |
| /* Output the symbol. */ |
| |
| bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); |
| |
| *indexp = output_index; |
| |
| if (isym.n_sclass == C_EXT) |
| { |
| long indx; |
| struct xcoff_link_hash_entry *h; |
| |
| indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd)) |
| / isymesz); |
| h = obj_xcoff_sym_hashes (input_bfd)[indx]; |
| BFD_ASSERT (h != NULL); |
| h->indx = output_index; |
| } |
| |
| /* If this is a symbol in the TOC which we may have merged |
| (class XMC_TC), remember the symbol index of the TOC |
| symbol. */ |
| if (isym.n_sclass == C_HIDEXT |
| && aux.x_csect.x_smclas == XMC_TC |
| && *sym_hash != NULL) |
| { |
| BFD_ASSERT (((*sym_hash)->flags & XCOFF_SET_TOC) == 0); |
| BFD_ASSERT ((*sym_hash)->toc_section != NULL); |
| (*sym_hash)->u.toc_indx = output_index; |
| } |
| |
| output_index += add; |
| outsym += add * osymesz; |
| } |
| |
| esym += add * isymesz; |
| isymp += add; |
| csectpp += add; |
| sym_hash += add; |
| if (debug_index != NULL) |
| debug_index += add; |
| ++indexp; |
| for (--add; add > 0; --add) |
| *indexp++ = -1; |
| } |
| |
| /* Fix up the aux entries and the C_BSTAT symbols. This must be |
| done in a separate pass, because we don't know the correct symbol |
| indices until we have already decided which symbols we are going |
| to keep. */ |
| |
| esym = (bfd_byte *) obj_coff_external_syms (input_bfd); |
| esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz; |
| isymp = finfo->internal_syms; |
| indexp = finfo->sym_indices; |
| csectpp = xcoff_data (input_bfd)->csects; |
| outsym = finfo->outsyms; |
| while (esym < esym_end) |
| { |
| int add; |
| |
| add = 1 + isymp->n_numaux; |
| |
| if (*indexp < 0) |
| esym += add * isymesz; |
| else |
| { |
| int i; |
| |
| if (isymp->n_sclass == C_BSTAT) |
| { |
| struct internal_syment isym; |
| unsigned long indx; |
| |
| /* The value of a C_BSTAT symbol is the symbol table |
| index of the containing csect. */ |
| bfd_coff_swap_sym_in (output_bfd, (PTR) outsym, (PTR) &isym); |
| indx = isym.n_value; |
| if (indx < obj_raw_syment_count (input_bfd)) |
| { |
| long symindx; |
| |
| symindx = finfo->sym_indices[indx]; |
| if (symindx < 0) |
| isym.n_value = 0; |
| else |
| isym.n_value = symindx; |
| bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, |
| (PTR) outsym); |
| } |
| } |
| |
| esym += isymesz; |
| outsym += osymesz; |
| |
| for (i = 0; i < isymp->n_numaux && esym < esym_end; i++) |
| { |
| union internal_auxent aux; |
| |
| bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type, |
| isymp->n_sclass, i, isymp->n_numaux, |
| (PTR) &aux); |
| |
| if (isymp->n_sclass == C_FILE) |
| { |
| /* This is the file name (or some comment put in by |
| the compiler). If it is long, we must put it in |
| the string table. */ |
| if (aux.x_file.x_n.x_zeroes == 0 |
| && aux.x_file.x_n.x_offset != 0) |
| { |
| const char *filename; |
| bfd_size_type indx; |
| |
| BFD_ASSERT (aux.x_file.x_n.x_offset |
| >= STRING_SIZE_SIZE); |
| if (strings == NULL) |
| { |
| strings = _bfd_coff_read_string_table (input_bfd); |
| if (strings == NULL) |
| return false; |
| } |
| filename = strings + aux.x_file.x_n.x_offset; |
| indx = _bfd_stringtab_add (finfo->strtab, filename, |
| hash, copy); |
| if (indx == (bfd_size_type) -1) |
| return false; |
| aux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx; |
| } |
| } |
| else if ((isymp->n_sclass == C_EXT |
| || isymp->n_sclass == C_HIDEXT) |
| && i + 1 == isymp->n_numaux) |
| { |
| /* We don't support type checking. I don't know if |
| anybody does. */ |
| aux.x_csect.x_parmhash = 0; |
| /* I don't think anybody uses these fields, but we'd |
| better clobber them just in case. */ |
| aux.x_csect.x_stab = 0; |
| aux.x_csect.x_snstab = 0; |
| if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_LD) |
| { |
| unsigned long indx; |
| |
| indx = aux.x_csect.x_scnlen.l; |
| if (indx < obj_raw_syment_count (input_bfd)) |
| { |
| long symindx; |
| |
| symindx = finfo->sym_indices[indx]; |
| if (symindx < 0) |
| aux.x_sym.x_tagndx.l = 0; |
| else |
| aux.x_sym.x_tagndx.l = symindx; |
| } |
| } |
| } |
| else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL) |
| { |
| unsigned long indx; |
| |
| if (ISFCN (isymp->n_type) |
| || ISTAG (isymp->n_sclass) |
| || isymp->n_sclass == C_BLOCK |
| || isymp->n_sclass == C_FCN) |
| { |
| indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l; |
| if (indx > 0 |
| && indx < obj_raw_syment_count (input_bfd)) |
| { |
| /* We look forward through the symbol for |
| the index of the next symbol we are going |
| to include. I don't know if this is |
| entirely right. */ |
| while (finfo->sym_indices[indx] < 0 |
| && indx < obj_raw_syment_count (input_bfd)) |
| ++indx; |
| if (indx >= obj_raw_syment_count (input_bfd)) |
| indx = output_index; |
| else |
| indx = finfo->sym_indices[indx]; |
| aux.x_sym.x_fcnary.x_fcn.x_endndx.l = indx; |
| } |
| } |
| |
| indx = aux.x_sym.x_tagndx.l; |
| if (indx > 0 && indx < obj_raw_syment_count (input_bfd)) |
| { |
| long symindx; |
| |
| symindx = finfo->sym_indices[indx]; |
| if (symindx < 0) |
| aux.x_sym.x_tagndx.l = 0; |
| else |
| aux.x_sym.x_tagndx.l = symindx; |
| } |
| } |
| |
| /* Copy over the line numbers, unless we are stripping |
| them. We do this on a symbol by symbol basis in |
| order to more easily handle garbage collection. */ |
| if ((isymp->n_sclass == C_EXT |
| || isymp->n_sclass == C_HIDEXT) |
| && i == 0 |
| && isymp->n_numaux > 1 |
| && ISFCN (isymp->n_type) |
| && aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0) |
| { |
| if (finfo->info->strip != strip_none |
| && finfo->info->strip != strip_some) |
| aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0; |
| else |
| { |
| asection *enclosing; |
| unsigned int enc_count; |
| bfd_size_type linoff; |
| struct internal_lineno lin; |
| |
| o = *csectpp; |
| enclosing = xcoff_section_data (abfd, o)->enclosing; |
| enc_count = xcoff_section_data (abfd, o)->lineno_count; |
| if (oline != enclosing) |
| { |
| if (bfd_seek (input_bfd, |
| enclosing->line_filepos, |
| SEEK_SET) != 0 |
| || (bfd_read (finfo->linenos, linesz, |
| enc_count, input_bfd) |
| != linesz * enc_count)) |
| return false; |
| oline = enclosing; |
| } |
| |
| linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr |
| - enclosing->line_filepos); |
| |
| bfd_coff_swap_lineno_in (input_bfd, |
| (PTR) (finfo->linenos + linoff), |
| (PTR) &lin); |
| if (lin.l_lnno != 0 |
| || ((bfd_size_type) lin.l_addr.l_symndx |
| != ((esym |
| - isymesz |
| - ((bfd_byte *) |
| obj_coff_external_syms (input_bfd))) |
| / isymesz))) |
| aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0; |
| else |
| { |
| bfd_byte *linpend, *linp; |
| bfd_vma offset; |
| bfd_size_type count; |
| |
| lin.l_addr.l_symndx = *indexp; |
| bfd_coff_swap_lineno_out (output_bfd, (PTR) &lin, |
| (PTR) (finfo->linenos |
| + linoff)); |
| |
| linpend = (finfo->linenos |
| + enc_count * linesz); |
| offset = (o->output_section->vma |
| + o->output_offset |
| - o->vma); |
| for (linp = finfo->linenos + linoff + linesz; |
| linp < linpend; |
| linp += linesz) |
| { |
| bfd_coff_swap_lineno_in (input_bfd, (PTR) linp, |
| (PTR) &lin); |
| if (lin.l_lnno == 0) |
| break; |
| lin.l_addr.l_paddr += offset; |
| bfd_coff_swap_lineno_out (output_bfd, |
| (PTR) &lin, |
| (PTR) linp); |
| } |
| |
| count = (linp - (finfo->linenos + linoff)) / linesz; |
| |
| aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = |
| (o->output_section->line_filepos |
| + o->output_section->lineno_count * linesz); |
| |
| if (bfd_seek (output_bfd, |
| aux.x_sym.x_fcnary.x_fcn.x_lnnoptr, |
| SEEK_SET) != 0 |
| || (bfd_write (finfo->linenos + linoff, |
| linesz, count, output_bfd) |
| != linesz * count)) |
| return false; |
| |
| o->output_section->lineno_count += count; |
| |
| if (incls > 0) |
| { |
| struct internal_syment *iisp, *iispend; |
| long *iindp; |
| bfd_byte *oos; |
| int iiadd; |
| |
| /* Update any C_BINCL or C_EINCL symbols |
| that refer to a line number in the |
| range we just output. */ |
| iisp = finfo->internal_syms; |
| iispend = (iisp |
| + obj_raw_syment_count (input_bfd)); |
| iindp = finfo->sym_indices; |
| oos = finfo->outsyms; |
| while (iisp < iispend) |
| { |
| if (*iindp >= 0 |
| && (iisp->n_sclass == C_BINCL |
| || iisp->n_sclass == C_EINCL) |
| && ((bfd_size_type) iisp->n_value |
| >= enclosing->line_filepos + linoff) |
| && ((bfd_size_type) iisp->n_value |
| < (enclosing->line_filepos |
| + enc_count * linesz))) |
| { |
| struct internal_syment iis; |
| |
| bfd_coff_swap_sym_in (output_bfd, |
| (PTR) oos, |
| (PTR) &iis); |
| iis.n_value = |
| (iisp->n_value |
| - enclosing->line_filepos |
| - linoff |
| + aux.x_sym.x_fcnary.x_fcn.x_lnnoptr); |
| bfd_coff_swap_sym_out (output_bfd, |
| (PTR) &iis, |
| (PTR) oos); |
| --incls; |
| } |
| |
| iiadd = 1 + iisp->n_numaux; |
| if (*iindp >= 0) |
| oos += iiadd * osymesz; |
| iisp += iiadd; |
| iindp += iiadd; |
| } |
| } |
| } |
| } |
| } |
| |
| bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type, |
| isymp->n_sclass, i, isymp->n_numaux, |
| (PTR) outsym); |
| outsym += osymesz; |
| esym += isymesz; |
| } |
| } |
| |
| indexp += add; |
| isymp += add; |
| csectpp += add; |
| } |
| |
| /* If we swapped out a C_FILE symbol, guess that the next C_FILE |
| symbol will be the first symbol in the next input file. In the |
| normal case, this will save us from writing out the C_FILE symbol |
| again. */ |
| if (finfo->last_file_index != -1 |
| && (bfd_size_type) finfo->last_file_index >= syment_base) |
| { |
| finfo->last_file.n_value = output_index; |
| bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file, |
| (PTR) (finfo->outsyms |
| + ((finfo->last_file_index - syment_base) |
| * osymesz))); |
| } |
| |
| /* Write the modified symbols to the output file. */ |
| if (outsym > finfo->outsyms) |
| { |
| if (bfd_seek (output_bfd, |
| obj_sym_filepos (output_bfd) + syment_base * osymesz, |
| SEEK_SET) != 0 |
| || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, |
| output_bfd) |
| != (bfd_size_type) (outsym - finfo->outsyms))) |
| return false; |
| |
| BFD_ASSERT ((obj_raw_syment_count (output_bfd) |
| + (outsym - finfo->outsyms) / osymesz) |
| == output_index); |
| |
| obj_raw_syment_count (output_bfd) = output_index; |
| } |
| |
| /* Don't let the linker relocation routines discard the symbols. */ |
| keep_syms = obj_coff_keep_syms (input_bfd); |
| obj_coff_keep_syms (input_bfd) = true; |
| |
| /* Relocate the contents of each section. */ |
| for (o = input_bfd->sections; o != NULL; o = o->next) |
| { |
| bfd_byte *contents; |
| |
| if (! o->linker_mark) |
| { |
| /* This section was omitted from the link. */ |
| continue; |
| } |
| |
| if ((o->flags & SEC_HAS_CONTENTS) == 0 |
| || o->_raw_size == 0 |
| || (o->flags & SEC_IN_MEMORY) != 0) |
| continue; |
| |
| /* We have set filepos correctly for the sections we created to |
| represent csects, so bfd_get_section_contents should work. */ |
| if (coff_section_data (input_bfd, o) != NULL |
| && coff_section_data (input_bfd, o)->contents != NULL) |
| contents = coff_section_data (input_bfd, o)->contents; |
| else |
| { |
| if (! bfd_get_section_contents (input_bfd, o, finfo->contents, |
| (file_ptr) 0, o->_raw_size)) |
| return false; |
| contents = finfo->contents; |
| } |
| |
| if ((o->flags & SEC_RELOC) != 0) |
| { |
| int target_index; |
| struct internal_reloc *internal_relocs; |
| struct internal_reloc *irel; |
| bfd_vma offset; |
| struct internal_reloc *irelend; |
| struct xcoff_link_hash_entry **rel_hash; |
| long r_symndx; |
| |
| /* Read in the relocs. */ |
| target_index = o->output_section->target_index; |
| internal_relocs = (xcoff_read_internal_relocs |
| (input_bfd, o, false, finfo->external_relocs, |
| true, |
| (finfo->section_info[target_index].relocs |
| + o->output_section->reloc_count))); |
| if (internal_relocs == NULL) |
| return false; |
| |
| /* Call processor specific code to relocate the section |
| contents. */ |
| if (! bfd_coff_relocate_section (output_bfd, finfo->info, |
| input_bfd, o, |
| contents, |
| internal_relocs, |
| finfo->internal_syms, |
| xcoff_data (input_bfd)->csects)) |
| return false; |
| |
| offset = o->output_section->vma + o->output_offset - o->vma; |
| irel = internal_relocs; |
| irelend = irel + o->reloc_count; |
| rel_hash = (finfo->section_info[target_index].rel_hashes |
| + o->output_section->reloc_count); |
| for (; irel < irelend; irel++, rel_hash++) |
| { |
| struct xcoff_link_hash_entry *h = NULL; |
| struct internal_ldrel ldrel; |
| boolean quiet; |
| |
| *rel_hash = NULL; |
| |
| /* Adjust the reloc address and symbol index. */ |
| |
| irel->r_vaddr += offset; |
| |
| r_symndx = irel->r_symndx; |
| |
| if (r_symndx == -1) |
| h = NULL; |
| else |
| h = obj_xcoff_sym_hashes (input_bfd)[r_symndx]; |
| |
| if (r_symndx != -1 && finfo->info->strip != strip_all) |
| { |
| if (h != NULL |
| && h->smclas != XMC_TD |
| && (irel->r_type == R_TOC |
| || irel->r_type == R_GL |
| || irel->r_type == R_TCL |
| || irel->r_type == R_TRL |
| || irel->r_type == R_TRLA)) |
| { |
| /* This is a TOC relative reloc with a symbol |
| attached. The symbol should be the one which |
| this reloc is for. We want to make this |
| reloc against the TOC address of the symbol, |
| not the symbol itself. */ |
| BFD_ASSERT (h->toc_section != NULL); |
| BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0); |
| if (h->u.toc_indx != -1) |
| irel->r_symndx = h->u.toc_indx; |
| else |
| { |
| struct xcoff_toc_rel_hash *n; |
| struct xcoff_link_section_info *si; |
| |
| n = ((struct xcoff_toc_rel_hash *) |
| bfd_alloc (finfo->output_bfd, |
| sizeof (struct xcoff_toc_rel_hash))); |
| if (n == NULL) |
| return false; |
| si = finfo->section_info + target_index; |
| n->next = si->toc_rel_hashes; |
| n->h = h; |
| n->rel = irel; |
| si->toc_rel_hashes = n; |
| } |
| } |
| else if (h != NULL) |
| { |
| /* This is a global symbol. */ |
| if (h->indx >= 0) |
| irel->r_symndx = h->indx; |
| else |
| { |
| /* This symbol is being written at the end |
| of the file, and we do not yet know the |
| symbol index. We save the pointer to the |
| hash table entry in the rel_hash list. |
| We set the indx field to -2 to indicate |
| that this symbol must not be stripped. */ |
| *rel_hash = h; |
| h->indx = -2; |
| } |
| } |
| else |
| { |
| long indx; |
| |
| indx = finfo->sym_indices[r_symndx]; |
| |
| if (indx == -1) |
| { |
| struct internal_syment *is; |
| |
| /* Relocations against a TC0 TOC anchor are |
| automatically transformed to be against |
| the TOC anchor in the output file. */ |
| is = finfo->internal_syms + r_symndx; |
| if (is->n_sclass == C_HIDEXT |
| && is->n_numaux > 0) |
| { |
| PTR auxptr; |
| union internal_auxent aux; |
| |
| auxptr = ((PTR) |
| (((bfd_byte *) |
| obj_coff_external_syms (input_bfd)) |
| + ((r_symndx + is->n_numaux) |
| * isymesz))); |
| bfd_coff_swap_aux_in (input_bfd, auxptr, |
| is->n_type, is->n_sclass, |
| is->n_numaux - 1, |
| is->n_numaux, |
| (PTR) &aux); |
| if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD |
| && aux.x_csect.x_smclas == XMC_TC0) |
| indx = finfo->toc_symindx; |
| } |
| } |
| |
| if (indx != -1) |
| irel->r_symndx = indx; |
| else |
| { |
| struct internal_syment *is; |
| const char *name; |
| char buf[SYMNMLEN + 1]; |
| |
| /* This reloc is against a symbol we are |
| stripping. It would be possible to handle |
| this case, but I don't think it's worth it. */ |
| is = finfo->internal_syms + r_symndx; |
| |
| name = (_bfd_coff_internal_syment_name |
| (input_bfd, is, buf)); |
| if (name == NULL) |
| return false; |
| |
| if (! ((*finfo->info->callbacks->unattached_reloc) |
| (finfo->info, name, input_bfd, o, |
| irel->r_vaddr))) |
| return false; |
| } |
| } |
| } |
| |
| quiet = false; |
| switch (irel->r_type) |
| { |
| default: |
| if (h == NULL |
| || h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak |
| || h->root.type == bfd_link_hash_common) |
| break; |
| /* Fall through. */ |
| case R_POS: |
| case R_NEG: |
| case R_RL: |
| case R_RLA: |
| /* This reloc needs to be copied into the .loader |
| section. */ |
| ldrel.l_vaddr = irel->r_vaddr; |
| if (r_symndx == -1) |
| ldrel.l_symndx = -1; |
| else if (h == NULL |
| || (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak |
| || h->root.type == bfd_link_hash_common)) |
| { |
| asection *sec; |
| |
| if (h == NULL) |
| sec = xcoff_data (input_bfd)->csects[r_symndx]; |
| else if (h->root.type == bfd_link_hash_common) |
| sec = h->root.u.c.p->section; |
| else |
| sec = h->root.u.def.section; |
| sec = sec->output_section; |
| |
| if (strcmp (sec->name, ".text") == 0) |
| ldrel.l_symndx = 0; |
| else if (strcmp (sec->name, ".data") == 0) |
| ldrel.l_symndx = 1; |
| else if (strcmp (sec->name, ".bss") == 0) |
| ldrel.l_symndx = 2; |
| else |
| { |
| (*_bfd_error_handler) |
| (_("%s: loader reloc in unrecognized section `%s'"), |
| bfd_get_filename (input_bfd), |
| sec->name); |
| bfd_set_error (bfd_error_nonrepresentable_section); |
| return false; |
| } |
| } |
| else |
| { |
| if (! finfo->info->relocateable |
| && (h->flags & XCOFF_DEF_DYNAMIC) == 0 |
| && (h->flags & XCOFF_IMPORT) == 0) |
| { |
| /* We already called the undefined_symbol |
| callback for this relocation, in |
| _bfd_ppc_xcoff_relocate_section. Don't |
| issue any more warnings. */ |
| quiet = true; |
| } |
| if (h->ldindx < 0 && ! quiet) |
| { |
| (*_bfd_error_handler) |
| (_("%s: `%s' in loader reloc but not loader sym"), |
| bfd_get_filename (input_bfd), |
| h->root.root.string); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| ldrel.l_symndx = h->ldindx; |
| } |
| ldrel.l_rtype = (irel->r_size << 8) | irel->r_type; |
| ldrel.l_rsecnm = o->output_section->target_index; |
| if (xcoff_hash_table (finfo->info)->textro |
| && strcmp (o->output_section->name, ".text") == 0 |
| && ! quiet) |
| { |
| (*_bfd_error_handler) |
| (_("%s: loader reloc in read-only section %s"), |
| bfd_get_filename (input_bfd), |
| bfd_get_section_name (finfo->output_bfd, |
| o->output_section)); |
| bfd_set_error (bfd_error_invalid_operation); |
| return false; |
| } |
| xcoff_swap_ldrel_out (output_bfd, &ldrel, |
| finfo->ldrel); |
| BFD_ASSERT (sizeof (struct external_ldrel) == LDRELSZ); |
| ++finfo->ldrel; |
| break; |
| |
| case R_TOC: |
| case R_GL: |
| case R_TCL: |
| case R_TRL: |
| case R_TRLA: |
| /* We should never need a .loader reloc for a TOC |
| relative reloc. */ |
| break; |
| } |
| } |
| |
| o->output_section->reloc_count += o->reloc_count; |
| } |
| |
| /* Write out the modified section contents. */ |
| if (! bfd_set_section_contents (output_bfd, o->output_section, |
| contents, o->output_offset, |
| (o->_cooked_size != 0 |
| ? o->_cooked_size |
| : o->_raw_size))) |
| return false; |
| } |
| |
| obj_coff_keep_syms (input_bfd) = keep_syms; |
| |
| if (! finfo->info->keep_memory) |
| { |
| if (! _bfd_coff_free_symbols (input_bfd)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| #undef N_TMASK |
| #undef N_BTSHFT |
| |
| /* Write out a non-XCOFF global symbol. */ |
| |
| static boolean |
| xcoff_write_global_symbol (h, p) |
| struct xcoff_link_hash_entry *h; |
| PTR p; |
| { |
| struct xcoff_final_link_info *finfo = (struct xcoff_final_link_info *) p; |
| bfd *output_bfd; |
| bfd_byte *outsym; |
| struct internal_syment isym; |
| union internal_auxent aux; |
| |
| output_bfd = finfo->output_bfd; |
| outsym = finfo->outsyms; |
| |
| /* If this symbol was garbage collected, just skip it. */ |
| if (xcoff_hash_table (finfo->info)->gc |
| && (h->flags & XCOFF_MARK) == 0) |
| return true; |
| |
| /* If we need a .loader section entry, write it out. */ |
| if (h->ldsym != NULL) |
| { |
| struct internal_ldsym *ldsym; |
| bfd *impbfd; |
| |
| ldsym = h->ldsym; |
| |
| if (h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak) |
| { |
| ldsym->l_value = 0; |
| ldsym->l_scnum = N_UNDEF; |
| ldsym->l_smtype = XTY_ER; |
| impbfd = h->root.u.undef.abfd; |
| } |
| else if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| asection *sec; |
| |
| sec = h->root.u.def.section; |
| ldsym->l_value = (sec->output_section->vma |
| + sec->output_offset |
| + h->root.u.def.value); |
| ldsym->l_scnum = sec->output_section->target_index; |
| ldsym->l_smtype = XTY_SD; |
| impbfd = sec->owner; |
| } |
| else |
| abort (); |
| |
| if (((h->flags & XCOFF_DEF_REGULAR) == 0 |
| && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| || (h->flags & XCOFF_IMPORT) != 0) |
| ldsym->l_smtype |= L_IMPORT; |
| if (((h->flags & XCOFF_DEF_REGULAR) != 0 |
| && (h->flags & XCOFF_DEF_DYNAMIC) != 0) |
| || (h->flags & XCOFF_EXPORT) != 0) |
| ldsym->l_smtype |= L_EXPORT; |
| if ((h->flags & XCOFF_ENTRY) != 0) |
| ldsym->l_smtype |= L_ENTRY; |
| |
| ldsym->l_smclas = h->smclas; |
| |
| if (ldsym->l_ifile == (bfd_size_type) -1) |
| ldsym->l_ifile = 0; |
| else if (ldsym->l_ifile == 0) |
| { |
| if ((ldsym->l_smtype & L_IMPORT) == 0) |
| ldsym->l_ifile = 0; |
| else if (impbfd == NULL) |
| ldsym->l_ifile = 0; |
| else |
| { |
| BFD_ASSERT (impbfd->xvec == output_bfd->xvec); |
| ldsym->l_ifile = xcoff_data (impbfd)->import_file_id; |
| } |
| } |
| |
| ldsym->l_parm = 0; |
| |
| BFD_ASSERT (h->ldindx >= 0); |
| BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym)); |
| xcoff_swap_ldsym_out (output_bfd, ldsym, finfo->ldsym + h->ldindx - 3); |
| h->ldsym = NULL; |
| } |
| |
| /* If this symbol needs global linkage code, write it out. */ |
| if (h->root.type == bfd_link_hash_defined |
| && (h->root.u.def.section |
| == xcoff_hash_table (finfo->info)->linkage_section)) |
| { |
| bfd_byte *p; |
| bfd_vma tocoff; |
| unsigned int i; |
| |
| p = h->root.u.def.section->contents + h->root.u.def.value; |
| |
| /* The first instruction in the global linkage code loads a |
| specific TOC element. */ |
| tocoff = (h->descriptor->toc_section->output_section->vma |
| + h->descriptor->toc_section->output_offset |
| - xcoff_data (output_bfd)->toc); |
| if ((h->descriptor->flags & XCOFF_SET_TOC) != 0) |
| tocoff += h->descriptor->u.toc_offset; |
| bfd_put_32 (output_bfd, XCOFF_GLINK_FIRST | (tocoff & 0xffff), p); |
| for (i = 0, p += 4; |
| i < sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]; |
| i++, p += 4) |
| bfd_put_32 (output_bfd, xcoff_glink_code[i], p); |
| } |
| |
| /* If we created a TOC entry for this symbol, write out the required |
| relocs. */ |
| if ((h->flags & XCOFF_SET_TOC) != 0) |
| { |
| asection *tocsec; |
| asection *osec; |
| int oindx; |
| struct internal_reloc *irel; |
| struct internal_ldrel ldrel; |
| struct internal_syment irsym; |
| union internal_auxent iraux; |
| |
| tocsec = h->toc_section; |
| osec = tocsec->output_section; |
| oindx = osec->target_index; |
| irel = finfo->section_info[oindx].relocs + osec->reloc_count; |
| irel->r_vaddr = (osec->vma |
| + tocsec->output_offset |
| + h->u.toc_offset); |
| if (h->indx >= 0) |
| irel->r_symndx = h->indx; |
| else |
| { |
| h->indx = -2; |
| irel->r_symndx = obj_raw_syment_count (output_bfd); |
| } |
| irel->r_type = R_POS; |
| irel->r_size = 31; |
| finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; |
| ++osec->reloc_count; |
| |
| BFD_ASSERT (h->ldindx >= 0); |
| ldrel.l_vaddr = irel->r_vaddr; |
| ldrel.l_symndx = h->ldindx; |
| ldrel.l_rtype = (31 << 8) | R_POS; |
| ldrel.l_rsecnm = oindx; |
| xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); |
| ++finfo->ldrel; |
| |
| /* We need to emit a symbol to define a csect which holds the |
| reloc. */ |
| if (finfo->info->strip != strip_all) |
| { |
| if (strlen (h->root.root.string) <= SYMNMLEN) |
| strncpy (irsym._n._n_name, h->root.root.string, SYMNMLEN); |
| else |
| { |
| boolean hash; |
| bfd_size_type indx; |
| |
| hash = true; |
| if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) |
| hash = false; |
| indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, |
| hash, false); |
| if (indx == (bfd_size_type) -1) |
| return false; |
| irsym._n._n_n._n_zeroes = 0; |
| irsym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; |
| } |
| |
| irsym.n_value = irel->r_vaddr; |
| irsym.n_scnum = osec->target_index; |
| irsym.n_sclass = C_HIDEXT; |
| irsym.n_type = T_NULL; |
| irsym.n_numaux = 1; |
| |
| bfd_coff_swap_sym_out (output_bfd, (PTR) &irsym, (PTR) outsym); |
| outsym += bfd_coff_symesz (output_bfd); |
| |
| memset (&iraux, 0, sizeof iraux); |
| iraux.x_csect.x_smtyp = XTY_SD; |
| iraux.x_csect.x_scnlen.l = 4; |
| iraux.x_csect.x_smclas = XMC_TC; |
| |
| bfd_coff_swap_aux_out (output_bfd, (PTR) &iraux, T_NULL, C_HIDEXT, |
| 0, 1, (PTR) outsym); |
| outsym += bfd_coff_auxesz (output_bfd); |
| |
| if (h->indx >= 0) |
| { |
| /* We aren't going to write out the symbols below, so we |
| need to write them out now. */ |
| if (bfd_seek (output_bfd, |
| (obj_sym_filepos (output_bfd) |
| + (obj_raw_syment_count (output_bfd) |
| * bfd_coff_symesz (output_bfd))), |
| SEEK_SET) != 0 |
| || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, |
| output_bfd) |
| != (bfd_size_type) (outsym - finfo->outsyms))) |
| return false; |
| obj_raw_syment_count (output_bfd) += |
| (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd); |
| |
| outsym = finfo->outsyms; |
| } |
| } |
| } |
| |
| /* If this symbol is a specially defined function descriptor, write |
| it out. The first word is the address of the function code |
| itself, the second word is the address of the TOC, and the third |
| word is zero. */ |
| if ((h->flags & XCOFF_DESCRIPTOR) != 0 |
| && h->root.type == bfd_link_hash_defined |
| && (h->root.u.def.section |
| == xcoff_hash_table (finfo->info)->descriptor_section)) |
| { |
| asection *sec; |
| asection *osec; |
| int oindx; |
| bfd_byte *p; |
| struct xcoff_link_hash_entry *hentry; |
| asection *esec; |
| struct internal_reloc *irel; |
| struct internal_ldrel ldrel; |
| asection *tsec; |
| |
| sec = h->root.u.def.section; |
| osec = sec->output_section; |
| oindx = osec->target_index; |
| p = sec->contents + h->root.u.def.value; |
| |
| hentry = h->descriptor; |
| BFD_ASSERT (hentry != NULL |
| && (hentry->root.type == bfd_link_hash_defined |
| || hentry->root.type == bfd_link_hash_defweak)); |
| esec = hentry->root.u.def.section; |
| bfd_put_32 (output_bfd, |
| (esec->output_section->vma |
| + esec->output_offset |
| + hentry->root.u.def.value), |
| p); |
| |
| irel = finfo->section_info[oindx].relocs + osec->reloc_count; |
| irel->r_vaddr = (osec->vma |
| + sec->output_offset |
| + h->root.u.def.value); |
| irel->r_symndx = esec->output_section->target_index; |
| irel->r_type = R_POS; |
| irel->r_size = 31; |
| finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; |
| ++osec->reloc_count; |
| |
| ldrel.l_vaddr = irel->r_vaddr; |
| if (strcmp (esec->output_section->name, ".text") == 0) |
| ldrel.l_symndx = 0; |
| else if (strcmp (esec->output_section->name, ".data") == 0) |
| ldrel.l_symndx = 1; |
| else if (strcmp (esec->output_section->name, ".bss") == 0) |
| ldrel.l_symndx = 2; |
| else |
| { |
| (*_bfd_error_handler) |
| (_("%s: loader reloc in unrecognized section `%s'"), |
| bfd_get_filename (output_bfd), |
| esec->output_section->name); |
| bfd_set_error (bfd_error_nonrepresentable_section); |
| return false; |
| } |
| ldrel.l_rtype = (31 << 8) | R_POS; |
| ldrel.l_rsecnm = oindx; |
| xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); |
| ++finfo->ldrel; |
| |
| bfd_put_32 (output_bfd, xcoff_data (output_bfd)->toc, p + 4); |
| |
| tsec = coff_section_from_bfd_index (output_bfd, |
| xcoff_data (output_bfd)->sntoc); |
| |
| ++irel; |
| irel->r_vaddr = (osec->vma |
| + sec->output_offset |
| + h->root.u.def.value |
| + 4); |
| irel->r_symndx = tsec->output_section->target_index; |
| irel->r_type = R_POS; |
| irel->r_size = 31; |
| finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL; |
| ++osec->reloc_count; |
| |
| ldrel.l_vaddr = irel->r_vaddr; |
| if (strcmp (tsec->output_section->name, ".text") == 0) |
| ldrel.l_symndx = 0; |
| else if (strcmp (tsec->output_section->name, ".data") == 0) |
| ldrel.l_symndx = 1; |
| else if (strcmp (tsec->output_section->name, ".bss") == 0) |
| ldrel.l_symndx = 2; |
| else |
| { |
| (*_bfd_error_handler) |
| (_("%s: loader reloc in unrecognized section `%s'"), |
| bfd_get_filename (output_bfd), |
| tsec->output_section->name); |
| bfd_set_error (bfd_error_nonrepresentable_section); |
| return false; |
| } |
| ldrel.l_rtype = (31 << 8) | R_POS; |
| ldrel.l_rsecnm = oindx; |
| xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); |
| ++finfo->ldrel; |
| } |
| |
| if (h->indx >= 0 || finfo->info->strip == strip_all) |
| { |
| BFD_ASSERT (outsym == finfo->outsyms); |
| return true; |
| } |
| |
| if (h->indx != -2 |
| && (finfo->info->strip == strip_all |
| || (finfo->info->strip == strip_some |
| && (bfd_hash_lookup (finfo->info->keep_hash, |
| h->root.root.string, false, false) |
| == NULL)))) |
| { |
| BFD_ASSERT (outsym == finfo->outsyms); |
| return true; |
| } |
| |
| if (h->indx != -2 |
| && (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0) |
| { |
| BFD_ASSERT (outsym == finfo->outsyms); |
| return true; |
| } |
| |
| memset (&aux, 0, sizeof aux); |
| |
| h->indx = obj_raw_syment_count (output_bfd); |
| |
| if (strlen (h->root.root.string) <= SYMNMLEN) |
| strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN); |
| else |
| { |
| boolean hash; |
| bfd_size_type indx; |
| |
| hash = true; |
| if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0) |
| hash = false; |
| indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash, |
| false); |
| if (indx == (bfd_size_type) -1) |
| return false; |
| isym._n._n_n._n_zeroes = 0; |
| isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx; |
| } |
| |
| if (h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak) |
| { |
| isym.n_value = 0; |
| isym.n_scnum = N_UNDEF; |
| isym.n_sclass = C_EXT; |
| aux.x_csect.x_smtyp = XTY_ER; |
| } |
| else if ((h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| && h->smclas == XMC_XO) |
| { |
| BFD_ASSERT (bfd_is_abs_section (h->root.u.def.section)); |
| isym.n_value = h->root.u.def.value; |
| isym.n_scnum = N_UNDEF; |
| isym.n_sclass = C_EXT; |
| aux.x_csect.x_smtyp = XTY_ER; |
| } |
| else if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| struct xcoff_link_size_list *l; |
| |
| isym.n_value = (h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset |
| + h->root.u.def.value); |
| isym.n_scnum = h->root.u.def.section->output_section->target_index; |
| isym.n_sclass = C_HIDEXT; |
| aux.x_csect.x_smtyp = XTY_SD; |
| |
| if ((h->flags & XCOFF_HAS_SIZE) != 0) |
| { |
| for (l = xcoff_hash_table (finfo->info)->size_list; |
| l != NULL; |
| l = l->next) |
| { |
| if (l->h == h) |
| { |
| aux.x_csect.x_scnlen.l = l->size; |
| break; |
| } |
| } |
| } |
| } |
| else if (h->root.type == bfd_link_hash_common) |
| { |
| isym.n_value = (h->root.u.c.p->section->output_section->vma |
| + h->root.u.c.p->section->output_offset); |
| isym.n_scnum = h->root.u.c.p->section->output_section->target_index; |
| isym.n_sclass = C_EXT; |
| aux.x_csect.x_smtyp = XTY_CM; |
| aux.x_csect.x_scnlen.l = h->root.u.c.size; |
| } |
| else |
| abort (); |
| |
| isym.n_type = T_NULL; |
| isym.n_numaux = 1; |
| |
| bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); |
| outsym += bfd_coff_symesz (output_bfd); |
| |
| aux.x_csect.x_smclas = h->smclas; |
| |
| bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, isym.n_sclass, 0, 1, |
| (PTR) outsym); |
| outsym += bfd_coff_auxesz (output_bfd); |
| |
| if ((h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| && h->smclas != XMC_XO) |
| { |
| /* We just output an SD symbol. Now output an LD symbol. */ |
| |
| h->indx += 2; |
| |
| isym.n_sclass = C_EXT; |
| bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym); |
| outsym += bfd_coff_symesz (output_bfd); |
| |
| aux.x_csect.x_smtyp = XTY_LD; |
| aux.x_csect.x_scnlen.l = obj_raw_syment_count (output_bfd); |
| |
| bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, C_EXT, 0, 1, |
| (PTR) outsym); |
| outsym += bfd_coff_auxesz (output_bfd); |
| } |
| |
| if (bfd_seek (output_bfd, |
| (obj_sym_filepos (output_bfd) |
| + (obj_raw_syment_count (output_bfd) |
| * bfd_coff_symesz (output_bfd))), |
| SEEK_SET) != 0 |
| || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, output_bfd) |
| != (bfd_size_type) (outsym - finfo->outsyms))) |
| return false; |
| obj_raw_syment_count (output_bfd) += |
| (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd); |
| |
| return true; |
| } |
| |
| /* Handle a link order which is supposed to generate a reloc. */ |
| |
| static boolean |
| xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order) |
| bfd *output_bfd; |
| struct xcoff_final_link_info *finfo; |
| asection *output_section; |
| struct bfd_link_order *link_order; |
| { |
| reloc_howto_type *howto; |
| struct xcoff_link_hash_entry *h; |
| asection *hsec; |
| bfd_vma hval; |
| bfd_vma addend; |
| struct internal_reloc *irel; |
| struct xcoff_link_hash_entry **rel_hash_ptr; |
| struct internal_ldrel ldrel; |
| |
| if (link_order->type == bfd_section_reloc_link_order) |
| { |
| /* We need to somehow locate a symbol in the right section. The |
| symbol must either have a value of zero, or we must adjust |
| the addend by the value of the symbol. FIXME: Write this |
| when we need it. The old linker couldn't handle this anyhow. */ |
| abort (); |
| } |
| |
| howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); |
| if (howto == NULL) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| |
| h = ((struct xcoff_link_hash_entry *) |
| bfd_wrapped_link_hash_lookup (output_bfd, finfo->info, |
| link_order->u.reloc.p->u.name, |
| false, false, true)); |
| if (h == NULL) |
| { |
| if (! ((*finfo->info->callbacks->unattached_reloc) |
| (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL, |
| (asection *) NULL, (bfd_vma) 0))) |
| return false; |
| return true; |
| } |
| |
| if (h->root.type == bfd_link_hash_common) |
| { |
| hsec = h->root.u.c.p->section; |
| hval = 0; |
| } |
| else if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| hsec = h->root.u.def.section; |
| hval = h->root.u.def.value; |
| } |
| else |
| { |
| hsec = NULL; |
| hval = 0; |
| } |
| |
| addend = link_order->u.reloc.p->addend; |
| if (hsec != NULL) |
| addend += (hsec->output_section->vma |
| + hsec->output_offset |
| + hval); |
| |
| if (addend != 0) |
| { |
| bfd_size_type size; |
| bfd_byte *buf; |
| bfd_reloc_status_type rstat; |
| boolean ok; |
| |
| size = bfd_get_reloc_size (howto); |
| buf = (bfd_byte *) bfd_zmalloc (size); |
| if (buf == NULL) |
| return false; |
| |
| rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); |
| switch (rstat) |
| { |
| case bfd_reloc_ok: |
| break; |
| default: |
| case bfd_reloc_outofrange: |
| abort (); |
| case bfd_reloc_overflow: |
| if (! ((*finfo->info->callbacks->reloc_overflow) |
| (finfo->info, link_order->u.reloc.p->u.name, |
| howto->name, addend, (bfd *) NULL, (asection *) NULL, |
| (bfd_vma) 0))) |
| { |
| free (buf); |
| return false; |
| } |
| break; |
| } |
| ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, |
| (file_ptr) link_order->offset, size); |
| free (buf); |
| if (! ok) |
| return false; |
| } |
| |
| /* Store the reloc information in the right place. It will get |
| swapped and written out at the end of the final_link routine. */ |
| |
| irel = (finfo->section_info[output_section->target_index].relocs |
| + output_section->reloc_count); |
| rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes |
| + output_section->reloc_count); |
| |
| memset (irel, 0, sizeof (struct internal_reloc)); |
| *rel_hash_ptr = NULL; |
| |
| irel->r_vaddr = output_section->vma + link_order->offset; |
| |
| if (h->indx >= 0) |
| irel->r_symndx = h->indx; |
| else |
| { |
| /* Set the index to -2 to force this symbol to get written out. */ |
| h->indx = -2; |
| *rel_hash_ptr = h; |
| irel->r_symndx = 0; |
| } |
| |
| irel->r_type = howto->type; |
| irel->r_size = howto->bitsize - 1; |
| if (howto->complain_on_overflow == complain_overflow_signed) |
| irel->r_size |= 0x80; |
| |
| ++output_section->reloc_count; |
| |
| /* Now output the reloc to the .loader section. */ |
| |
| ldrel.l_vaddr = irel->r_vaddr; |
| |
| if (hsec != NULL) |
| { |
| const char *secname; |
| |
| secname = hsec->output_section->name; |
| |
| if (strcmp (secname, ".text") == 0) |
| ldrel.l_symndx = 0; |
| else if (strcmp (secname, ".data") == 0) |
| ldrel.l_symndx = 1; |
| else if (strcmp (secname, ".bss") == 0) |
| ldrel.l_symndx = 2; |
| else |
| { |
| (*_bfd_error_handler) |
| (_("%s: loader reloc in unrecognized section `%s'"), |
| bfd_get_filename (output_bfd), secname); |
| bfd_set_error (bfd_error_nonrepresentable_section); |
| return false; |
| } |
| } |
| else |
| { |
| if (h->ldindx < 0) |
| { |
| (*_bfd_error_handler) |
| (_("%s: `%s' in loader reloc but not loader sym"), |
| bfd_get_filename (output_bfd), |
| h->root.root.string); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| ldrel.l_symndx = h->ldindx; |
| } |
| |
| ldrel.l_rtype = (irel->r_size << 8) | irel->r_type; |
| ldrel.l_rsecnm = output_section->target_index; |
| xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel); |
| ++finfo->ldrel; |
| |
| return true; |
| } |
| |
| /* Sort relocs by VMA. This is called via qsort. */ |
| |
| static int |
| xcoff_sort_relocs (p1, p2) |
| const PTR p1; |
| const PTR p2; |
| { |
| const struct internal_reloc *r1 = (const struct internal_reloc *) p1; |
| const struct internal_reloc *r2 = (const struct internal_reloc *) p2; |
| |
| if (r1->r_vaddr > r2->r_vaddr) |
| return 1; |
| else if (r1->r_vaddr < r2->r_vaddr) |
| return -1; |
| else |
| return 0; |
| } |
| |
| /* This is the relocation function for the RS/6000/POWER/PowerPC. |
| This is currently the only processor which uses XCOFF; I hope that |
| will never change. */ |
| |
| boolean |
| _bfd_ppc_xcoff_relocate_section (output_bfd, info, input_bfd, |
| input_section, contents, relocs, syms, |
| sections) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| bfd *input_bfd; |
| asection *input_section; |
| bfd_byte *contents; |
| struct internal_reloc *relocs; |
| struct internal_syment *syms; |
| asection **sections; |
| { |
| struct internal_reloc *rel; |
| struct internal_reloc *relend; |
| |
| rel = relocs; |
| relend = rel + input_section->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| long symndx; |
| struct xcoff_link_hash_entry *h; |
| struct internal_syment *sym; |
| bfd_vma addend; |
| bfd_vma val; |
| struct reloc_howto_struct howto; |
| bfd_reloc_status_type rstat; |
| |
| /* Relocation type R_REF is a special relocation type which is |
| merely used to prevent garbage collection from occurring for |
| the csect including the symbol which it references. */ |
| if (rel->r_type == R_REF) |
| continue; |
| |
| symndx = rel->r_symndx; |
| |
| if (symndx == -1) |
| { |
| h = NULL; |
| sym = NULL; |
| addend = 0; |
| } |
| else |
| { |
| h = obj_xcoff_sym_hashes (input_bfd)[symndx]; |
| sym = syms + symndx; |
| addend = - sym->n_value; |
| } |
| |
| /* We build the howto information on the fly. */ |
| |
| howto.type = rel->r_type; |
| howto.rightshift = 0; |
| howto.size = 2; |
| howto.bitsize = (rel->r_size & 0x1f) + 1; |
| howto.pc_relative = false; |
| howto.bitpos = 0; |
| if ((rel->r_size & 0x80) != 0) |
| howto.complain_on_overflow = complain_overflow_signed; |
| else |
| howto.complain_on_overflow = complain_overflow_bitfield; |
| howto.special_function = NULL; |
| howto.name = "internal"; |
| howto.partial_inplace = true; |
| if (howto.bitsize == 32) |
| howto.src_mask = howto.dst_mask = 0xffffffff; |
| else |
| { |
| howto.src_mask = howto.dst_mask = (1 << howto.bitsize) - 1; |
| if (howto.bitsize == 16) |
| howto.size = 1; |
| } |
| howto.pcrel_offset = false; |
| |
| val = 0; |
| |
| if (h == NULL) |
| { |
| asection *sec; |
| |
| if (symndx == -1) |
| { |
| sec = bfd_abs_section_ptr; |
| val = 0; |
| } |
| else |
| { |
| sec = sections[symndx]; |
| /* Hack to make sure we use the right TOC anchor value |
| if this reloc is against the TOC anchor. */ |
| if (sec->name[3] == '0' |
| && strcmp (sec->name, ".tc0") == 0) |
| val = xcoff_data (output_bfd)->toc; |
| else |
| val = (sec->output_section->vma |
| + sec->output_offset |
| + sym->n_value |
| - sec->vma); |
| } |
| } |
| else |
| { |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| asection *sec; |
| |
| sec = h->root.u.def.section; |
| val = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else if (h->root.type == bfd_link_hash_common) |
| { |
| asection *sec; |
| |
| sec = h->root.u.c.p->section; |
| val = (sec->output_section->vma |
| + sec->output_offset); |
| } |
| else if ((h->flags & XCOFF_DEF_DYNAMIC) != 0 |
| || (h->flags & XCOFF_IMPORT) != 0) |
| { |
| /* Every symbol in a shared object is defined somewhere. */ |
| val = 0; |
| } |
| else if (! info->relocateable) |
| { |
| if (! ((*info->callbacks->undefined_symbol) |
| (info, h->root.root.string, input_bfd, input_section, |
| rel->r_vaddr - input_section->vma, true))) |
| return false; |
| |
| /* Don't try to process the reloc. It can't help, and |
| it may generate another error. */ |
| continue; |
| } |
| } |
| |
| /* I took the relocation type definitions from two documents: |
| the PowerPC AIX Version 4 Application Binary Interface, First |
| Edition (April 1992), and the PowerOpen ABI, Big-Endian |
| 32-Bit Hardware Implementation (June 30, 1994). Differences |
| between the documents are noted below. */ |
| |
| switch (rel->r_type) |
| { |
| case R_RTB: |
| case R_RRTBI: |
| case R_RRTBA: |
| /* These relocs are defined by the PowerPC ABI to be |
| relative branches which use half of the difference |
| between the symbol and the program counter. I can't |
| quite figure out when this is useful. These relocs are |
| not defined by the PowerOpen ABI. */ |
| default: |
| (*_bfd_error_handler) |
| (_("%s: unsupported relocation type 0x%02x"), |
| bfd_get_filename (input_bfd), (unsigned int) rel->r_type); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| case R_POS: |
| /* Simple positive relocation. */ |
| break; |
| case R_NEG: |
| /* Simple negative relocation. */ |
| val = - val; |
| break; |
| case R_REL: |
| /* Simple PC relative relocation. */ |
| howto.pc_relative = true; |
| break; |
| case R_TOC: |
| /* TOC relative relocation. The value in the instruction in |
| the input file is the offset from the input file TOC to |
| the desired location. We want the offset from the final |
| TOC to the desired location. We have: |
| isym = iTOC + in |
| iinsn = in + o |
| osym = oTOC + on |
| oinsn = on + o |
| so we must change insn by on - in. |
| */ |
| case R_GL: |
| /* Global linkage relocation. The value of this relocation |
| is the address of the entry in the TOC section. */ |
| case R_TCL: |
| /* Local object TOC address. I can't figure out the |
| difference between this and case R_GL. */ |
| case R_TRL: |
| /* TOC relative relocation. A TOC relative load instruction |
| which may be changed to a load address instruction. |
| FIXME: We don't currently implement this optimization. */ |
| case R_TRLA: |
| /* TOC relative relocation. This is a TOC relative load |
| address instruction which may be changed to a load |
| instruction. FIXME: I don't know if this is the correct |
| implementation. */ |
| if (h != NULL && h->smclas != XMC_TD) |
| { |
| if (h->toc_section == NULL) |
| { |
| (*_bfd_error_handler) |
| (_("%s: TOC reloc at 0x%x to symbol `%s' with no TOC entry"), |
| bfd_get_filename (input_bfd), rel->r_vaddr, |
| h->root.root.string); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| |
| BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0); |
| val = (h->toc_section->output_section->vma |
| + h->toc_section->output_offset); |
| } |
| |
| val = ((val - xcoff_data (output_bfd)->toc) |
| - (sym->n_value - xcoff_data (input_bfd)->toc)); |
| addend = 0; |
| break; |
| case R_BA: |
| /* Absolute branch. We don't want to mess with the lower |
| two bits of the instruction. */ |
| case R_CAI: |
| /* The PowerPC ABI defines this as an absolute call which |
| may be modified to become a relative call. The PowerOpen |
| ABI does not define this relocation type. */ |
| case R_RBA: |
| /* Absolute branch which may be modified to become a |
| relative branch. */ |
| case R_RBAC: |
| /* The PowerPC ABI defines this as an absolute branch to a |
| fixed address which may be modified to an absolute branch |
| to a symbol. The PowerOpen ABI does not define this |
| relocation type. */ |
| case R_RBRC: |
| /* The PowerPC ABI defines this as an absolute branch to a |
| fixed address which may be modified to a relative branch. |
| The PowerOpen ABI does not define this relocation type. */ |
| howto.src_mask &= ~3; |
| howto.dst_mask = howto.src_mask; |
| break; |
| case R_BR: |
| /* Relative branch. We don't want to mess with the lower |
| two bits of the instruction. */ |
| case R_CREL: |
| /* The PowerPC ABI defines this as a relative call which may |
| be modified to become an absolute call. The PowerOpen |
| ABI does not define this relocation type. */ |
| case R_RBR: |
| /* A relative branch which may be modified to become an |
| absolute branch. FIXME: We don't implement this, |
| although we should for symbols of storage mapping class |
| XMC_XO. */ |
| howto.pc_relative = true; |
| howto.src_mask &= ~3; |
| howto.dst_mask = howto.src_mask; |
| break; |
| case R_RL: |
| /* The PowerPC AIX ABI describes this as a load which may be |
| changed to a load address. The PowerOpen ABI says this |
| is the same as case R_POS. */ |
| break; |
| case R_RLA: |
| /* The PowerPC AIX ABI describes this as a load address |
| which may be changed to a load. The PowerOpen ABI says |
| this is the same as R_POS. */ |
| break; |
| } |
| |
| /* If we see an R_BR or R_RBR reloc which is jumping to global |
| linkage code, and it is followed by an appropriate cror nop |
| instruction, we replace the cror with lwz r2,20(r1). This |
| restores the TOC after the glink code. Contrariwise, if the |
| call is followed by a lwz r2,20(r1), but the call is not |
| going to global linkage code, we can replace the load with a |
| cror. */ |
| if ((rel->r_type == R_BR || rel->r_type == R_RBR) |
| && h != NULL |
| && h->root.type == bfd_link_hash_defined |
| && (rel->r_vaddr - input_section->vma + 8 |
| <= input_section->_cooked_size)) |
| { |
| bfd_byte *pnext; |
| unsigned long next; |
| |
| pnext = contents + (rel->r_vaddr - input_section->vma) + 4; |
| next = bfd_get_32 (input_bfd, pnext); |
| |
| /* The _ptrgl function is magic. It is used by the AIX |
| compiler to call a function through a pointer. */ |
| if (h->smclas == XMC_GL |
| || strcmp (h->root.root.string, "._ptrgl") == 0) |
| { |
| if (next == 0x4def7b82 /* cror 15,15,15 */ |
| || next == 0x4ffffb82) /* cror 31,31,31 */ |
| bfd_put_32 (input_bfd, 0x80410014, pnext); /* lwz r1,20(r1) */ |
| } |
| else |
| { |
| if (next == 0x80410014) /* lwz r1,20(r1) */ |
| bfd_put_32 (input_bfd, 0x4ffffb82, pnext); /* cror 31,31,31 */ |
| } |
| } |
| |
| /* A PC relative reloc includes the section address. */ |
| if (howto.pc_relative) |
| addend += input_section->vma; |
| |
| rstat = _bfd_final_link_relocate (&howto, input_bfd, input_section, |
| contents, |
| rel->r_vaddr - input_section->vma, |
| val, addend); |
| |
| switch (rstat) |
| { |
| default: |
| abort (); |
| case bfd_reloc_ok: |
| break; |
| case bfd_reloc_overflow: |
| { |
| const char *name; |
| char buf[SYMNMLEN + 1]; |
| char howto_name[10]; |
| |
| if (symndx == -1) |
| name = "*ABS*"; |
| else if (h != NULL) |
| name = h->root.root.string; |
| else |
| { |
| name = _bfd_coff_internal_syment_name (input_bfd, sym, buf); |
| if (name == NULL) |
| return false; |
| } |
| sprintf (howto_name, "0x%02x", rel->r_type); |
| |
| if (! ((*info->callbacks->reloc_overflow) |
| (info, name, howto_name, (bfd_vma) 0, input_bfd, |
| input_section, rel->r_vaddr - input_section->vma))) |
| return false; |
| } |
| } |
| } |
| |
| return true; |
| } |