| /* Support for 32-bit PowerPC NLM (NetWare Loadable Module) |
| Copyright (C) 1994-2016 Free Software Foundation, Inc. |
| |
| 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 3 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., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "libbfd.h" |
| |
| /* The format of a PowerPC NLM changed. Define OLDFORMAT to get the |
| old format. */ |
| |
| #define ARCH_SIZE 32 |
| |
| #include "nlm/ppc-ext.h" |
| #define Nlm_External_Fixed_Header Nlm32_powerpc_External_Fixed_Header |
| |
| #include "libnlm.h" |
| |
| #ifdef OLDFORMAT |
| |
| /* The prefix header is only used in the old format. */ |
| |
| /* PowerPC NLM's have a prefix header before the standard NLM. This |
| function reads it in, verifies the version, and seeks the bfd to |
| the location before the regular NLM header. */ |
| |
| static bfd_boolean |
| nlm_powerpc_backend_object_p (bfd *abfd) |
| { |
| struct nlm32_powerpc_external_prefix_header s; |
| |
| if (bfd_bread (& s, (bfd_size_type) sizeof s, abfd) != sizeof s) |
| return FALSE; |
| |
| if (memcmp (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature) != 0 |
| || H_GET_32 (abfd, s.headerVersion) != NLM32_POWERPC_HEADER_VERSION) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| /* Write out the prefix. */ |
| |
| static bfd_boolean |
| nlm_powerpc_write_prefix (bfd *abfd) |
| { |
| struct nlm32_powerpc_external_prefix_header s; |
| |
| memset (&s, 0, sizeof s); |
| memcpy (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature); |
| H_PUT_32 (abfd, NLM32_POWERPC_HEADER_VERSION, s.headerVersion); |
| H_PUT_32 (abfd, 0, s.origins); |
| |
| /* FIXME: What should we do about the date? */ |
| |
| if (bfd_bwrite (& s, (bfd_size_type) sizeof s, abfd) != sizeof s) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| /* This reloc handling is only applicable to the old format. */ |
| |
| /* How to process the various reloc types. PowerPC NLMs use XCOFF |
| reloc types, and I have just copied the XCOFF reloc table here. */ |
| |
| static reloc_howto_type nlm_powerpc_howto_table[] = |
| { |
| /* Standard 32 bit relocation. */ |
| 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, /* Source mask. */ |
| 0xffffffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* 32 bit relocation, but store negative value. */ |
| HOWTO (1, /* 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_NEG", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffffffff, /* Source mask. */ |
| 0xffffffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* 32 bit PC relative relocation. */ |
| HOWTO (2, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 32, /* Bitsize. */ |
| TRUE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_signed, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_REL", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffffffff, /* Source mask. */ |
| 0xffffffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* 16 bit TOC relative relocation. */ |
| HOWTO (3, /* Type. */ |
| 0, /* Rightshift. */ |
| 1, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_signed, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_TOC", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* I don't really know what this is. */ |
| HOWTO (4, /* Type. */ |
| 1, /* 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_RTB", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffffffff, /* Source mask. */ |
| 0xffffffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* External TOC relative symbol. */ |
| HOWTO (5, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_GL", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* Local TOC relative symbol. */ |
| HOWTO (6, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_TCL", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| { 7 }, |
| |
| /* Non modifiable absolute branch. */ |
| HOWTO (8, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 26, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_BA", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0x3fffffc, /* Source mask. */ |
| 0x3fffffc, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| { 9 }, |
| |
| /* Non modifiable relative branch. */ |
| HOWTO (0xa, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 26, /* Bitsize. */ |
| TRUE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_signed, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_BR", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0x3fffffc, /* Source mask. */ |
| 0x3fffffc, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| { 0xb }, |
| |
| /* Indirect load. */ |
| HOWTO (0xc, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_RL", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* Load address. */ |
| HOWTO (0xd, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_RLA", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| { 0xe }, |
| |
| /* Non-relocating reference. */ |
| HOWTO (0xf, /* 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_REF", /* Name. */ |
| FALSE, /* Partial_inplace. */ |
| 0, /* Source mask. */ |
| 0, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| { 0x10 }, |
| { 0x11 }, |
| |
| /* TOC relative indirect load. */ |
| HOWTO (0x12, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_TRL", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* TOC relative load address. */ |
| HOWTO (0x13, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_TRLA", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* Modifiable relative branch. */ |
| HOWTO (0x14, /* Type. */ |
| 1, /* 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_RRTBI", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffffffff, /* Source mask. */ |
| 0xffffffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* Modifiable absolute branch. */ |
| HOWTO (0x15, /* Type. */ |
| 1, /* 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_RRTBA", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffffffff, /* Source mask. */ |
| 0xffffffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* Modifiable call absolute indirect. */ |
| HOWTO (0x16, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_CAI", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* Modifiable call relative. */ |
| HOWTO (0x17, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_REL", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* Modifiable branch absolute. */ |
| HOWTO (0x18, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_RBA", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* Modifiable branch absolute. */ |
| HOWTO (0x19, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_RBAC", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* Modifiable branch relative. */ |
| HOWTO (0x1a, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 26, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_signed, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_REL", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE), /* PC rel offset. */ |
| |
| /* Modifiable branch absolute. */ |
| HOWTO (0x1b, /* Type. */ |
| 0, /* Rightshift. */ |
| 2, /* Size (0 = byte, 1 = short, 2 = long). */ |
| 16, /* Bitsize. */ |
| FALSE, /* PC relative. */ |
| 0, /* Bitpos. */ |
| complain_overflow_bitfield, /* Complain_on_overflow. */ |
| 0, /* Special_function. */ |
| "R_REL", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffff, /* Source mask. */ |
| 0xffff, /* Dest mask. */ |
| FALSE) /* PC rel offset. */ |
| }; |
| |
| #define HOWTO_COUNT (sizeof nlm_powerpc_howto_table \ |
| / sizeof nlm_powerpc_howto_table[0]) |
| |
| /* Read a PowerPC NLM reloc. */ |
| |
| static bfd_boolean |
| nlm_powerpc_read_reloc (bfd *abfd, |
| nlmNAME (symbol_type) *sym, |
| asection **secp, |
| arelent *rel) |
| { |
| struct nlm32_powerpc_external_reloc ext; |
| bfd_vma l_vaddr; |
| unsigned long l_symndx; |
| int l_rtype; |
| int l_rsecnm; |
| asection *code_sec, *data_sec, *bss_sec; |
| |
| /* Read the reloc from the file. */ |
| if (bfd_bread (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext) |
| return FALSE; |
| |
| /* Swap in the fields. */ |
| l_vaddr = H_GET_32 (abfd, ext.l_vaddr); |
| l_symndx = H_GET_32 (abfd, ext.l_symndx); |
| l_rtype = H_GET_16 (abfd, ext.l_rtype); |
| l_rsecnm = H_GET_16 (abfd, ext.l_rsecnm); |
| |
| /* Get the sections now, for convenience. */ |
| code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); |
| data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); |
| bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME); |
| |
| /* Work out the arelent fields. */ |
| if (sym != NULL) |
| /* This is an import. sym_ptr_ptr is filled in by |
| nlm_canonicalize_reloc. */ |
| rel->sym_ptr_ptr = NULL; |
| else |
| { |
| asection *sec; |
| |
| if (l_symndx == 0) |
| sec = code_sec; |
| else if (l_symndx == 1) |
| sec = data_sec; |
| else if (l_symndx == 2) |
| sec = bss_sec; |
| else |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| |
| rel->sym_ptr_ptr = sec->symbol_ptr_ptr; |
| } |
| |
| rel->addend = 0; |
| |
| BFD_ASSERT ((l_rtype & 0xff) < HOWTO_COUNT); |
| |
| rel->howto = nlm_powerpc_howto_table + (l_rtype & 0xff); |
| |
| BFD_ASSERT (rel->howto->name != NULL |
| && ((l_rtype & 0x8000) != 0 |
| ? (rel->howto->complain_on_overflow |
| == complain_overflow_signed) |
| : (rel->howto->complain_on_overflow |
| == complain_overflow_bitfield)) |
| && ((l_rtype >> 8) & 0x1f) == rel->howto->bitsize - 1); |
| |
| if (l_rsecnm == 0) |
| *secp = code_sec; |
| else if (l_rsecnm == 1) |
| { |
| *secp = data_sec; |
| l_vaddr -= code_sec->size; |
| } |
| else |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| |
| rel->address = l_vaddr; |
| |
| return TRUE; |
| } |
| |
| #else /* not OLDFORMAT */ |
| |
| /* There is only one type of reloc in a PowerPC NLM. */ |
| |
| static reloc_howto_type nlm_powerpc_howto = |
| 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. */ |
| "32", /* Name. */ |
| TRUE, /* Partial_inplace. */ |
| 0xffffffff, /* Source mask. */ |
| 0xffffffff, /* Dest mask. */ |
| FALSE); /* PC rel_offset. */ |
| |
| /* Read a PowerPC NLM reloc. */ |
| |
| static bfd_boolean |
| nlm_powerpc_read_reloc (bfd *abfd, |
| nlmNAME (symbol_type) *sym, |
| asection **secp, |
| arelent *rel) |
| { |
| bfd_byte temp[4]; |
| bfd_vma val; |
| const char *name; |
| |
| if (bfd_bread (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp)) |
| return FALSE; |
| |
| val = bfd_get_32 (abfd, temp); |
| |
| /* The value is a word offset into either the code or data segment. |
| This is the location which needs to be adjusted. |
| |
| The high bit is 0 if the value is an offset into the data |
| segment, or 1 if the value is an offset into the text segment. |
| |
| If this is a relocation fixup rather than an imported symbol (the |
| sym argument is NULL), then the second most significant bit is 0 |
| if the address of the data segment should be added to the |
| location addressed by the value, or 1 if the address of the text |
| segment should be added. |
| |
| If this is an imported symbol, the second most significant bit is |
| not used and must be 0. */ |
| |
| if ((val & NLM_HIBIT) == 0) |
| name = NLM_INITIALIZED_DATA_NAME; |
| else |
| { |
| name = NLM_CODE_NAME; |
| val &=~ NLM_HIBIT; |
| } |
| *secp = bfd_get_section_by_name (abfd, name); |
| |
| if (sym == NULL) |
| { |
| if ((val & (NLM_HIBIT >> 1)) == 0) |
| name = NLM_INITIALIZED_DATA_NAME; |
| else |
| { |
| name = NLM_CODE_NAME; |
| val &=~ (NLM_HIBIT >> 1); |
| } |
| rel->sym_ptr_ptr = bfd_get_section_by_name (abfd, name)->symbol_ptr_ptr; |
| } |
| |
| rel->howto = & nlm_powerpc_howto; |
| rel->address = val << 2; |
| rel->addend = 0; |
| |
| return TRUE; |
| } |
| |
| #endif /* not OLDFORMAT */ |
| |
| /* Mangle PowerPC NLM relocs for output. */ |
| |
| static bfd_boolean |
| nlm_powerpc_mangle_relocs (bfd *abfd ATTRIBUTE_UNUSED, |
| asection *sec ATTRIBUTE_UNUSED, |
| const void * data ATTRIBUTE_UNUSED, |
| bfd_vma offset ATTRIBUTE_UNUSED, |
| bfd_size_type count ATTRIBUTE_UNUSED) |
| { |
| return TRUE; |
| } |
| |
| /* Read a PowerPC NLM import record */ |
| |
| static bfd_boolean |
| nlm_powerpc_read_import (bfd * abfd, nlmNAME (symbol_type) * sym) |
| { |
| struct nlm_relent *nlm_relocs; /* Relocation records for symbol. */ |
| bfd_size_type rcount; /* Number of relocs. */ |
| bfd_byte temp[NLM_TARGET_LONG_SIZE]; /* Temporary 32-bit value. */ |
| unsigned char symlength; /* Length of symbol name. */ |
| char *name; |
| |
| if (bfd_bread (& symlength, (bfd_size_type) sizeof (symlength), abfd) |
| != sizeof (symlength)) |
| return FALSE; |
| sym -> symbol.the_bfd = abfd; |
| name = bfd_alloc (abfd, (bfd_size_type) symlength + 1); |
| if (name == NULL) |
| return FALSE; |
| if (bfd_bread (name, (bfd_size_type) symlength, abfd) != symlength) |
| return FALSE; |
| name[symlength] = '\0'; |
| sym -> symbol.name = name; |
| sym -> symbol.flags = 0; |
| sym -> symbol.value = 0; |
| sym -> symbol.section = bfd_und_section_ptr; |
| if (bfd_bread (temp, (bfd_size_type) sizeof (temp), abfd) |
| != sizeof (temp)) |
| return FALSE; |
| rcount = H_GET_32 (abfd, temp); |
| nlm_relocs = bfd_alloc (abfd, rcount * sizeof (struct nlm_relent)); |
| if (nlm_relocs == NULL) |
| return FALSE; |
| sym -> relocs = nlm_relocs; |
| sym -> rcnt = 0; |
| while (sym -> rcnt < rcount) |
| { |
| asection *section; |
| |
| if (! nlm_powerpc_read_reloc (abfd, sym, §ion, &nlm_relocs -> reloc)) |
| return FALSE; |
| nlm_relocs -> section = section; |
| nlm_relocs++; |
| sym -> rcnt++; |
| } |
| return TRUE; |
| } |
| |
| #ifndef OLDFORMAT |
| |
| /* Write a PowerPC NLM reloc. */ |
| |
| static bfd_boolean |
| nlm_powerpc_write_import (bfd * abfd, asection * sec, arelent * rel) |
| { |
| asymbol *sym; |
| bfd_vma val; |
| bfd_byte temp[4]; |
| |
| /* PowerPC NetWare only supports one kind of reloc. */ |
| if (rel->addend != 0 |
| || rel->howto == NULL |
| || rel->howto->rightshift != 0 |
| || rel->howto->size != 2 |
| || rel->howto->bitsize != 32 |
| || rel->howto->bitpos != 0 |
| || rel->howto->pc_relative |
| || (rel->howto->src_mask != 0xffffffff && rel->addend != 0) |
| || rel->howto->dst_mask != 0xffffffff) |
| { |
| bfd_set_error (bfd_error_invalid_operation); |
| return FALSE; |
| } |
| |
| sym = *rel->sym_ptr_ptr; |
| |
| /* The value we write out is the offset into the appropriate |
| segment, rightshifted by two. This offset is the section vma, |
| adjusted by the vma of the lowest section in that segment, plus |
| the address of the relocation. */ |
| val = bfd_get_section_vma (abfd, sec) + rel->address; |
| if ((val & 3) != 0) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| val >>= 2; |
| |
| /* The high bit is 0 if the reloc is in the data section, or 1 if |
| the reloc is in the code section. */ |
| if (bfd_get_section_flags (abfd, sec) & SEC_DATA) |
| val -= nlm_get_data_low (abfd); |
| else |
| { |
| val -= nlm_get_text_low (abfd); |
| val |= NLM_HIBIT; |
| } |
| |
| if (! bfd_is_und_section (bfd_get_section (sym))) |
| { |
| /* This is an internal relocation fixup. The second most |
| significant bit is 0 if this is a reloc against the data |
| segment, or 1 if it is a reloc against the text segment. */ |
| if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE) |
| val |= NLM_HIBIT >> 1; |
| } |
| |
| bfd_put_32 (abfd, val, temp); |
| if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp)) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| #else /* OLDFORMAT */ |
| |
| /* This is used for the reloc handling in the old format. */ |
| |
| /* Write a PowerPC NLM reloc. */ |
| |
| static bfd_boolean |
| nlm_powerpc_write_reloc (bfd *abfd, |
| asection *sec, |
| arelent *rel, |
| int indx) |
| { |
| struct nlm32_powerpc_external_reloc ext; |
| asection *code_sec, *data_sec, *bss_sec; |
| asymbol *sym; |
| asection *symsec; |
| unsigned long l_symndx; |
| int l_rtype; |
| int l_rsecnm; |
| reloc_howto_type *howto; |
| bfd_size_type address; |
| |
| /* Get the sections now, for convenience. */ |
| code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); |
| data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); |
| bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME); |
| |
| sym = *rel->sym_ptr_ptr; |
| symsec = bfd_get_section (sym); |
| if (indx != -1) |
| { |
| BFD_ASSERT (bfd_is_und_section (symsec)); |
| l_symndx = indx + 3; |
| } |
| else |
| { |
| if (symsec == code_sec) |
| l_symndx = 0; |
| else if (symsec == data_sec) |
| l_symndx = 1; |
| else if (symsec == bss_sec) |
| l_symndx = 2; |
| else |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| } |
| |
| H_PUT_32 (abfd, l_symndx, ext.l_symndx); |
| |
| for (howto = nlm_powerpc_howto_table; |
| howto < nlm_powerpc_howto_table + HOWTO_COUNT; |
| howto++) |
| { |
| if (howto->rightshift == rel->howto->rightshift |
| && howto->size == rel->howto->size |
| && howto->bitsize == rel->howto->bitsize |
| && howto->pc_relative == rel->howto->pc_relative |
| && howto->bitpos == rel->howto->bitpos |
| && (howto->partial_inplace == rel->howto->partial_inplace |
| || (! rel->howto->partial_inplace |
| && rel->addend == 0)) |
| && (howto->src_mask == rel->howto->src_mask |
| || (rel->howto->src_mask == 0 |
| && rel->addend == 0)) |
| && howto->dst_mask == rel->howto->dst_mask |
| && howto->pcrel_offset == rel->howto->pcrel_offset) |
| break; |
| } |
| if (howto >= nlm_powerpc_howto_table + HOWTO_COUNT) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| |
| l_rtype = howto->type; |
| if (howto->complain_on_overflow == complain_overflow_signed) |
| l_rtype |= 0x8000; |
| l_rtype |= (howto->bitsize - 1) << 8; |
| H_PUT_16 (abfd, l_rtype, ext.l_rtype); |
| |
| address = rel->address; |
| |
| if (sec == code_sec) |
| l_rsecnm = 0; |
| else if (sec == data_sec) |
| { |
| l_rsecnm = 1; |
| address += code_sec->size; |
| } |
| else |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| |
| H_PUT_16 (abfd, l_rsecnm, ext.l_rsecnm); |
| H_PUT_32 (abfd, address, ext.l_vaddr); |
| |
| if (bfd_bwrite (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| /* Write a PowerPC NLM import. */ |
| |
| static bfd_boolean |
| nlm_powerpc_write_import (bfd * abfd, asection * sec, arelent * rel) |
| { |
| return nlm_powerpc_write_reloc (abfd, sec, rel, -1); |
| } |
| |
| #endif /* OLDFORMAT */ |
| |
| /* Write a PowerPC NLM external symbol. This routine keeps a static |
| count of the symbol index. FIXME: I don't know if this is |
| necessary, and the index never gets reset. */ |
| |
| static bfd_boolean |
| nlm_powerpc_write_external (bfd *abfd, |
| bfd_size_type count, |
| asymbol *sym, |
| struct reloc_and_sec *relocs) |
| { |
| unsigned int i; |
| bfd_byte len; |
| unsigned char temp[NLM_TARGET_LONG_SIZE]; |
| #ifdef OLDFORMAT |
| static int indx; |
| #endif |
| |
| len = strlen (sym->name); |
| if ((bfd_bwrite (&len, (bfd_size_type) sizeof (bfd_byte), abfd) |
| != sizeof (bfd_byte)) |
| || bfd_bwrite (sym->name, (bfd_size_type) len, abfd) != len) |
| return FALSE; |
| |
| bfd_put_32 (abfd, count, temp); |
| if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp)) |
| return FALSE; |
| |
| for (i = 0; i < count; i++) |
| { |
| #ifndef OLDFORMAT |
| if (! nlm_powerpc_write_import (abfd, relocs[i].sec, relocs[i].rel)) |
| return FALSE; |
| #else |
| if (! nlm_powerpc_write_reloc (abfd, relocs[i].sec, |
| relocs[i].rel, indx)) |
| return FALSE; |
| #endif |
| } |
| |
| #ifdef OLDFORMAT |
| ++indx; |
| #endif |
| |
| return TRUE; |
| } |
| |
| #ifndef OLDFORMAT |
| |
| /* PowerPC Netware uses a word offset, not a byte offset, for public |
| symbols. */ |
| |
| /* Set the section for a public symbol. */ |
| |
| static bfd_boolean |
| nlm_powerpc_set_public_section (bfd *abfd, nlmNAME (symbol_type) *sym) |
| { |
| if (sym->symbol.value & NLM_HIBIT) |
| { |
| sym->symbol.value &= ~NLM_HIBIT; |
| sym->symbol.flags |= BSF_FUNCTION; |
| sym->symbol.section = |
| bfd_get_section_by_name (abfd, NLM_CODE_NAME); |
| } |
| else |
| sym->symbol.section = |
| bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); |
| |
| sym->symbol.value <<= 2; |
| |
| return TRUE; |
| } |
| |
| /* Get the offset to write out for a public symbol. */ |
| |
| static bfd_vma |
| nlm_powerpc_get_public_offset (bfd *abfd, asymbol *sym) |
| { |
| bfd_vma offset; |
| asection *sec; |
| |
| offset = bfd_asymbol_value (sym); |
| sec = bfd_get_section (sym); |
| if (sec->flags & SEC_CODE) |
| { |
| offset -= nlm_get_text_low (abfd); |
| offset |= NLM_HIBIT; |
| } |
| else if (sec->flags & (SEC_DATA | SEC_ALLOC)) |
| { |
| /* SEC_ALLOC is for the .bss section. */ |
| offset -= nlm_get_data_low (abfd); |
| } |
| else |
| { |
| /* We can't handle an exported symbol that is not in the code or |
| data segment. */ |
| bfd_set_error (bfd_error_invalid_operation); |
| /* FIXME: No way to return error. */ |
| abort (); |
| } |
| |
| return offset; |
| } |
| |
| #endif /* ! defined (OLDFORMAT) */ |
| |
| #include "nlmswap.h" |
| |
| static const struct nlm_backend_data nlm32_powerpc_backend = |
| { |
| "NetWare PowerPC Module \032", |
| sizeof (Nlm32_powerpc_External_Fixed_Header), |
| #ifndef OLDFORMAT |
| 0, /* Optional_prefix_size. */ |
| #else |
| sizeof (struct nlm32_powerpc_external_prefix_header), |
| #endif |
| bfd_arch_powerpc, |
| 0, |
| FALSE, |
| #ifndef OLDFORMAT |
| 0, /* Backend_object_p. */ |
| 0, /* Write_prefix. */ |
| #else |
| nlm_powerpc_backend_object_p, |
| nlm_powerpc_write_prefix, |
| #endif |
| nlm_powerpc_read_reloc, |
| nlm_powerpc_mangle_relocs, |
| nlm_powerpc_read_import, |
| nlm_powerpc_write_import, |
| #ifndef OLDFORMAT |
| nlm_powerpc_set_public_section, |
| nlm_powerpc_get_public_offset, |
| #else |
| 0, /* Set_public_section. */ |
| 0, /* Get_public_offset. */ |
| #endif |
| nlm_swap_fixed_header_in, |
| nlm_swap_fixed_header_out, |
| nlm_powerpc_write_external, |
| 0, /* Write_export. */ |
| }; |
| |
| #define TARGET_BIG_NAME "nlm32-powerpc" |
| #define TARGET_BIG_SYM powerpc_nlm32_vec |
| #define TARGET_BACKEND_DATA & nlm32_powerpc_backend |
| |
| #include "nlm-target.h" |
