| /* write.c - emit .o file |
| Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
| 1998, 1999, 2000, 2001, 2002 |
| Free Software Foundation, Inc. |
| |
| This file is part of GAS, the GNU Assembler. |
| |
| GAS 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, or (at your option) |
| any later version. |
| |
| GAS 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 GAS; see the file COPYING. If not, write to the Free |
| Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 02111-1307, USA. */ |
| |
| /* This thing should be set up to do byteordering correctly. But... */ |
| |
| #include "as.h" |
| #include "subsegs.h" |
| #include "obstack.h" |
| #include "output-file.h" |
| #include "dwarf2dbg.h" |
| |
| /* This looks like a good idea. Let's try turning it on always, for now. */ |
| #undef BFD_FAST_SECTION_FILL |
| #define BFD_FAST_SECTION_FILL |
| |
| #ifndef TC_ADJUST_RELOC_COUNT |
| #define TC_ADJUST_RELOC_COUNT(FIXP,COUNT) |
| #endif |
| |
| #ifndef TC_FORCE_RELOCATION |
| #define TC_FORCE_RELOCATION(FIXP) 0 |
| #endif |
| |
| #ifndef TC_FORCE_RELOCATION_SECTION |
| #define TC_FORCE_RELOCATION_SECTION(FIXP,SEG) TC_FORCE_RELOCATION(FIXP) |
| #endif |
| |
| #ifndef TC_LINKRELAX_FIXUP |
| #define TC_LINKRELAX_FIXUP(SEG) 1 |
| #endif |
| |
| #ifndef TC_FIX_ADJUSTABLE |
| #define TC_FIX_ADJUSTABLE(fix) 1 |
| #endif |
| |
| #ifndef TC_FINALIZE_SYMS_BEFORE_SIZE_SEG |
| #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 1 |
| #endif |
| |
| #ifndef MD_PCREL_FROM_SECTION |
| #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from(FIXP) |
| #endif |
| |
| #ifndef WORKING_DOT_WORD |
| extern const int md_short_jump_size; |
| extern const int md_long_jump_size; |
| #endif |
| |
| /* Used to control final evaluation of expressions. */ |
| int finalize_syms = 0; |
| |
| int symbol_table_frozen; |
| void print_fixup PARAMS ((fixS *)); |
| |
| #ifdef BFD_ASSEMBLER |
| static void renumber_sections PARAMS ((bfd *, asection *, PTR)); |
| |
| /* We generally attach relocs to frag chains. However, after we have |
| chained these all together into a segment, any relocs we add after |
| that must be attached to a segment. This will include relocs added |
| in md_estimate_size_for_relax, for example. */ |
| static int frags_chained = 0; |
| #endif |
| |
| #ifndef BFD_ASSEMBLER |
| |
| #ifndef MANY_SEGMENTS |
| struct frag *text_frag_root; |
| struct frag *data_frag_root; |
| struct frag *bss_frag_root; |
| |
| struct frag *text_last_frag; /* Last frag in segment. */ |
| struct frag *data_last_frag; /* Last frag in segment. */ |
| static struct frag *bss_last_frag; /* Last frag in segment. */ |
| #endif |
| |
| #ifndef BFD |
| static object_headers headers; |
| #endif |
| |
| long string_byte_count; |
| char *next_object_file_charP; /* Tracks object file bytes. */ |
| |
| #ifndef OBJ_VMS |
| int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE; |
| #endif |
| |
| #endif /* BFD_ASSEMBLER */ |
| |
| static int n_fixups; |
| |
| #ifdef BFD_ASSEMBLER |
| static fixS *fix_new_internal PARAMS ((fragS *, int where, int size, |
| symbolS *add, symbolS *sub, |
| offsetT offset, int pcrel, |
| bfd_reloc_code_real_type r_type)); |
| #else |
| static fixS *fix_new_internal PARAMS ((fragS *, int where, int size, |
| symbolS *add, symbolS *sub, |
| offsetT offset, int pcrel, |
| int r_type)); |
| #endif |
| #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) |
| static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type)); |
| #endif |
| static relax_addressT relax_align PARAMS ((relax_addressT addr, int align)); |
| #if defined (BFD_ASSEMBLER) || ! defined (BFD) |
| static fragS *chain_frchains_together_1 PARAMS ((segT, struct frchain *)); |
| #endif |
| #ifdef BFD_ASSEMBLER |
| static void chain_frchains_together PARAMS ((bfd *, segT, PTR)); |
| static void cvt_frag_to_fill PARAMS ((segT, fragS *)); |
| static void adjust_reloc_syms PARAMS ((bfd *, asection *, PTR)); |
| static void write_relocs PARAMS ((bfd *, asection *, PTR)); |
| static void write_contents PARAMS ((bfd *, asection *, PTR)); |
| static void set_symtab PARAMS ((void)); |
| #endif |
| #if defined (BFD_ASSEMBLER) || (! defined (BFD) && ! defined (OBJ_AOUT)) |
| static void merge_data_into_text PARAMS ((void)); |
| #endif |
| #if ! defined (BFD_ASSEMBLER) && ! defined (BFD) |
| static void cvt_frag_to_fill PARAMS ((object_headers *, segT, fragS *)); |
| static void remove_subsegs PARAMS ((frchainS *, int, fragS **, fragS **)); |
| static void relax_and_size_all_segments PARAMS ((void)); |
| #endif |
| |
| /* Create a fixS in obstack 'notes'. */ |
| |
| static fixS * |
| fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel, |
| r_type) |
| fragS *frag; /* Which frag? */ |
| int where; /* Where in that frag? */ |
| int size; /* 1, 2, or 4 usually. */ |
| symbolS *add_symbol; /* X_add_symbol. */ |
| symbolS *sub_symbol; /* X_op_symbol. */ |
| offsetT offset; /* X_add_number. */ |
| int pcrel; /* TRUE if PC-relative relocation. */ |
| #ifdef BFD_ASSEMBLER |
| bfd_reloc_code_real_type r_type; /* Relocation type. */ |
| #else |
| int r_type; /* Relocation type. */ |
| #endif |
| { |
| fixS *fixP; |
| |
| n_fixups++; |
| |
| fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); |
| |
| fixP->fx_frag = frag; |
| fixP->fx_where = where; |
| fixP->fx_size = size; |
| /* We've made fx_size a narrow field; check that it's wide enough. */ |
| if (fixP->fx_size != size) |
| { |
| as_bad (_("field fx_size too small to hold %d"), size); |
| abort (); |
| } |
| fixP->fx_addsy = add_symbol; |
| fixP->fx_subsy = sub_symbol; |
| fixP->fx_offset = offset; |
| fixP->fx_pcrel = pcrel; |
| fixP->fx_plt = 0; |
| #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER) |
| fixP->fx_r_type = r_type; |
| #endif |
| fixP->fx_im_disp = 0; |
| fixP->fx_pcrel_adjust = 0; |
| fixP->fx_bit_fixP = 0; |
| fixP->fx_addnumber = 0; |
| fixP->fx_tcbit = 0; |
| fixP->fx_done = 0; |
| fixP->fx_no_overflow = 0; |
| fixP->fx_signed = 0; |
| |
| #ifdef USING_CGEN |
| fixP->fx_cgen.insn = NULL; |
| fixP->fx_cgen.opinfo = 0; |
| #endif |
| |
| #ifdef TC_FIX_TYPE |
| TC_INIT_FIX_DATA (fixP); |
| #endif |
| |
| as_where (&fixP->fx_file, &fixP->fx_line); |
| |
| /* Usually, we want relocs sorted numerically, but while |
| comparing to older versions of gas that have relocs |
| reverse sorted, it is convenient to have this compile |
| time option. xoxorich. */ |
| { |
| |
| #ifdef BFD_ASSEMBLER |
| fixS **seg_fix_rootP = (frags_chained |
| ? &seg_info (now_seg)->fix_root |
| : &frchain_now->fix_root); |
| fixS **seg_fix_tailP = (frags_chained |
| ? &seg_info (now_seg)->fix_tail |
| : &frchain_now->fix_tail); |
| #endif |
| |
| #ifdef REVERSE_SORT_RELOCS |
| |
| fixP->fx_next = *seg_fix_rootP; |
| *seg_fix_rootP = fixP; |
| |
| #else /* REVERSE_SORT_RELOCS */ |
| |
| fixP->fx_next = NULL; |
| |
| if (*seg_fix_tailP) |
| (*seg_fix_tailP)->fx_next = fixP; |
| else |
| *seg_fix_rootP = fixP; |
| *seg_fix_tailP = fixP; |
| |
| #endif /* REVERSE_SORT_RELOCS */ |
| } |
| |
| return fixP; |
| } |
| |
| /* Create a fixup relative to a symbol (plus a constant). */ |
| |
| fixS * |
| fix_new (frag, where, size, add_symbol, offset, pcrel, r_type) |
| fragS *frag; /* Which frag? */ |
| int where; /* Where in that frag? */ |
| int size; /* 1, 2, or 4 usually. */ |
| symbolS *add_symbol; /* X_add_symbol. */ |
| offsetT offset; /* X_add_number. */ |
| int pcrel; /* TRUE if PC-relative relocation. */ |
| #ifdef BFD_ASSEMBLER |
| bfd_reloc_code_real_type r_type; /* Relocation type. */ |
| #else |
| int r_type; /* Relocation type. */ |
| #endif |
| { |
| return fix_new_internal (frag, where, size, add_symbol, |
| (symbolS *) NULL, offset, pcrel, r_type); |
| } |
| |
| /* Create a fixup for an expression. Currently we only support fixups |
| for difference expressions. That is itself more than most object |
| file formats support anyhow. */ |
| |
| fixS * |
| fix_new_exp (frag, where, size, exp, pcrel, r_type) |
| fragS *frag; /* Which frag? */ |
| int where; /* Where in that frag? */ |
| int size; /* 1, 2, or 4 usually. */ |
| expressionS *exp; /* Expression. */ |
| int pcrel; /* TRUE if PC-relative relocation. */ |
| #ifdef BFD_ASSEMBLER |
| bfd_reloc_code_real_type r_type; /* Relocation type. */ |
| #else |
| int r_type; /* Relocation type. */ |
| #endif |
| { |
| symbolS *add = NULL; |
| symbolS *sub = NULL; |
| offsetT off = 0; |
| |
| switch (exp->X_op) |
| { |
| case O_absent: |
| break; |
| |
| case O_register: |
| as_bad (_("register value used as expression")); |
| break; |
| |
| case O_add: |
| /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if |
| the difference expression cannot immediately be reduced. */ |
| { |
| symbolS *stmp = make_expr_symbol (exp); |
| |
| exp->X_op = O_symbol; |
| exp->X_op_symbol = 0; |
| exp->X_add_symbol = stmp; |
| exp->X_add_number = 0; |
| |
| return fix_new_exp (frag, where, size, exp, pcrel, r_type); |
| } |
| |
| case O_symbol_rva: |
| add = exp->X_add_symbol; |
| off = exp->X_add_number; |
| |
| #if defined(BFD_ASSEMBLER) |
| r_type = BFD_RELOC_RVA; |
| #else |
| #if defined(TC_RVA_RELOC) |
| r_type = TC_RVA_RELOC; |
| #else |
| as_fatal (_("rva not supported")); |
| #endif |
| #endif |
| break; |
| |
| case O_uminus: |
| sub = exp->X_add_symbol; |
| off = exp->X_add_number; |
| break; |
| |
| case O_subtract: |
| sub = exp->X_op_symbol; |
| /* Fall through. */ |
| case O_symbol: |
| add = exp->X_add_symbol; |
| /* Fall through. */ |
| case O_constant: |
| off = exp->X_add_number; |
| break; |
| |
| default: |
| add = make_expr_symbol (exp); |
| break; |
| } |
| |
| return fix_new_internal (frag, where, size, add, sub, off, pcrel, r_type); |
| } |
| |
| /* Append a string onto another string, bumping the pointer along. */ |
| void |
| append (charPP, fromP, length) |
| char **charPP; |
| char *fromP; |
| unsigned long length; |
| { |
| /* Don't trust memcpy() of 0 chars. */ |
| if (length == 0) |
| return; |
| |
| memcpy (*charPP, fromP, length); |
| *charPP += length; |
| } |
| |
| #ifndef BFD_ASSEMBLER |
| int section_alignment[SEG_MAXIMUM_ORDINAL]; |
| #endif |
| |
| /* This routine records the largest alignment seen for each segment. |
| If the beginning of the segment is aligned on the worst-case |
| boundary, all of the other alignments within it will work. At |
| least one object format really uses this info. */ |
| |
| void |
| record_alignment (seg, align) |
| /* Segment to which alignment pertains. */ |
| segT seg; |
| /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte |
| boundary, etc.) */ |
| int align; |
| { |
| if (seg == absolute_section) |
| return; |
| #ifdef BFD_ASSEMBLER |
| if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg)) |
| bfd_set_section_alignment (stdoutput, seg, align); |
| #else |
| if (align > section_alignment[(int) seg]) |
| section_alignment[(int) seg] = align; |
| #endif |
| } |
| |
| int |
| get_recorded_alignment (seg) |
| segT seg; |
| { |
| if (seg == absolute_section) |
| return 0; |
| #ifdef BFD_ASSEMBLER |
| return bfd_get_section_alignment (stdoutput, seg); |
| #else |
| return section_alignment[(int) seg]; |
| #endif |
| } |
| |
| #ifdef BFD_ASSEMBLER |
| |
| /* Reset the section indices after removing the gas created sections. */ |
| |
| static void |
| renumber_sections (abfd, sec, countparg) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| asection *sec; |
| PTR countparg; |
| { |
| int *countp = (int *) countparg; |
| |
| sec->index = *countp; |
| ++*countp; |
| } |
| |
| #endif /* defined (BFD_ASSEMBLER) */ |
| |
| #if defined (BFD_ASSEMBLER) || ! defined (BFD) |
| |
| static fragS * |
| chain_frchains_together_1 (section, frchp) |
| segT section; |
| struct frchain *frchp; |
| { |
| fragS dummy, *prev_frag = &dummy; |
| #ifdef BFD_ASSEMBLER |
| fixS fix_dummy, *prev_fix = &fix_dummy; |
| #endif |
| |
| for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next) |
| { |
| prev_frag->fr_next = frchp->frch_root; |
| prev_frag = frchp->frch_last; |
| assert (prev_frag->fr_type != 0); |
| #ifdef BFD_ASSEMBLER |
| if (frchp->fix_root != (fixS *) NULL) |
| { |
| if (seg_info (section)->fix_root == (fixS *) NULL) |
| seg_info (section)->fix_root = frchp->fix_root; |
| prev_fix->fx_next = frchp->fix_root; |
| seg_info (section)->fix_tail = frchp->fix_tail; |
| prev_fix = frchp->fix_tail; |
| } |
| #endif |
| } |
| assert (prev_frag->fr_type != 0); |
| prev_frag->fr_next = 0; |
| return prev_frag; |
| } |
| |
| #endif |
| |
| #ifdef BFD_ASSEMBLER |
| |
| static void |
| chain_frchains_together (abfd, section, xxx) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| segT section; |
| PTR xxx ATTRIBUTE_UNUSED; |
| { |
| segment_info_type *info; |
| |
| /* BFD may have introduced its own sections without using |
| subseg_new, so it is possible that seg_info is NULL. */ |
| info = seg_info (section); |
| if (info != (segment_info_type *) NULL) |
| info->frchainP->frch_last |
| = chain_frchains_together_1 (section, info->frchainP); |
| |
| /* Now that we've chained the frags together, we must add new fixups |
| to the segment, not to the frag chain. */ |
| frags_chained = 1; |
| } |
| |
| #endif |
| |
| #if !defined (BFD) && !defined (BFD_ASSEMBLER) |
| |
| static void |
| remove_subsegs (head, seg, root, last) |
| frchainS *head; |
| int seg; |
| fragS **root; |
| fragS **last; |
| { |
| *root = head->frch_root; |
| *last = chain_frchains_together_1 (seg, head); |
| } |
| |
| #endif /* BFD */ |
| |
| #if defined (BFD_ASSEMBLER) || !defined (BFD) |
| |
| #ifdef BFD_ASSEMBLER |
| static void |
| cvt_frag_to_fill (sec, fragP) |
| segT sec ATTRIBUTE_UNUSED; |
| fragS *fragP; |
| #else |
| static void |
| cvt_frag_to_fill (headersP, sec, fragP) |
| object_headers *headersP; |
| segT sec; |
| fragS *fragP; |
| #endif |
| { |
| switch (fragP->fr_type) |
| { |
| case rs_align: |
| case rs_align_code: |
| case rs_align_test: |
| case rs_org: |
| case rs_space: |
| #ifdef HANDLE_ALIGN |
| HANDLE_ALIGN (fragP); |
| #endif |
| know (fragP->fr_next != NULL); |
| fragP->fr_offset = (fragP->fr_next->fr_address |
| - fragP->fr_address |
| - fragP->fr_fix) / fragP->fr_var; |
| if (fragP->fr_offset < 0) |
| { |
| as_bad_where (fragP->fr_file, fragP->fr_line, |
| _("attempt to .org/.space backwards? (%ld)"), |
| (long) fragP->fr_offset); |
| fragP->fr_offset = 0; |
| } |
| fragP->fr_type = rs_fill; |
| break; |
| |
| case rs_fill: |
| break; |
| |
| case rs_leb128: |
| { |
| valueT value = S_GET_VALUE (fragP->fr_symbol); |
| int size; |
| |
| size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value, |
| fragP->fr_subtype); |
| |
| fragP->fr_fix += size; |
| fragP->fr_type = rs_fill; |
| fragP->fr_var = 0; |
| fragP->fr_offset = 0; |
| fragP->fr_symbol = NULL; |
| } |
| break; |
| |
| case rs_cfa: |
| eh_frame_convert_frag (fragP); |
| break; |
| |
| case rs_dwarf2dbg: |
| dwarf2dbg_convert_frag (fragP); |
| break; |
| |
| case rs_machine_dependent: |
| #ifdef BFD_ASSEMBLER |
| md_convert_frag (stdoutput, sec, fragP); |
| #else |
| md_convert_frag (headersP, sec, fragP); |
| #endif |
| |
| assert (fragP->fr_next == NULL |
| || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) |
| == fragP->fr_fix)); |
| |
| /* After md_convert_frag, we make the frag into a ".space 0". |
| md_convert_frag() should set up any fixSs and constants |
| required. */ |
| frag_wane (fragP); |
| break; |
| |
| #ifndef WORKING_DOT_WORD |
| case rs_broken_word: |
| { |
| struct broken_word *lie; |
| |
| if (fragP->fr_subtype) |
| { |
| fragP->fr_fix += md_short_jump_size; |
| for (lie = (struct broken_word *) (fragP->fr_symbol); |
| lie && lie->dispfrag == fragP; |
| lie = lie->next_broken_word) |
| if (lie->added == 1) |
| fragP->fr_fix += md_long_jump_size; |
| } |
| frag_wane (fragP); |
| } |
| break; |
| #endif |
| |
| default: |
| BAD_CASE (fragP->fr_type); |
| break; |
| } |
| } |
| |
| #endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */ |
| |
| #ifdef BFD_ASSEMBLER |
| static void relax_seg PARAMS ((bfd *, asection *, PTR)); |
| static void |
| relax_seg (abfd, sec, xxx) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| asection *sec; |
| PTR xxx; |
| { |
| segment_info_type *seginfo = seg_info (sec); |
| |
| if (seginfo && seginfo->frchainP |
| && relax_segment (seginfo->frchainP->frch_root, sec)) |
| { |
| int *result = (int *) xxx; |
| *result = 1; |
| } |
| } |
| |
| static void size_seg PARAMS ((bfd *, asection *, PTR)); |
| static void |
| size_seg (abfd, sec, xxx) |
| bfd *abfd; |
| asection *sec; |
| PTR xxx ATTRIBUTE_UNUSED; |
| { |
| flagword flags; |
| fragS *fragp; |
| segment_info_type *seginfo; |
| int x; |
| valueT size, newsize; |
| |
| subseg_change (sec, 0); |
| |
| seginfo = seg_info (sec); |
| if (seginfo && seginfo->frchainP) |
| { |
| for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) |
| cvt_frag_to_fill (sec, fragp); |
| for (fragp = seginfo->frchainP->frch_root; |
| fragp->fr_next; |
| fragp = fragp->fr_next) |
| /* Walk to last elt. */ |
| ; |
| size = fragp->fr_address + fragp->fr_fix; |
| } |
| else |
| size = 0; |
| |
| flags = bfd_get_section_flags (abfd, sec); |
| |
| if (size > 0 && ! seginfo->bss) |
| flags |= SEC_HAS_CONTENTS; |
| |
| /* @@ This is just an approximation. */ |
| if (seginfo && seginfo->fix_root) |
| flags |= SEC_RELOC; |
| else |
| flags &= ~SEC_RELOC; |
| x = bfd_set_section_flags (abfd, sec, flags); |
| assert (x == true); |
| |
| newsize = md_section_align (sec, size); |
| x = bfd_set_section_size (abfd, sec, newsize); |
| assert (x == true); |
| |
| /* If the size had to be rounded up, add some padding in the last |
| non-empty frag. */ |
| assert (newsize >= size); |
| if (size != newsize) |
| { |
| fragS *last = seginfo->frchainP->frch_last; |
| fragp = seginfo->frchainP->frch_root; |
| while (fragp->fr_next != last) |
| fragp = fragp->fr_next; |
| last->fr_address = size; |
| if ((newsize - size) % fragp->fr_var == 0) |
| fragp->fr_offset += (newsize - size) / fragp->fr_var; |
| else |
| /* If we hit this abort, it's likely due to subsegs_finish not |
| providing sufficient alignment on the last frag, and the |
| machine dependent code using alignment frags with fr_var |
| greater than 1. */ |
| abort (); |
| } |
| |
| #ifdef tc_frob_section |
| tc_frob_section (sec); |
| #endif |
| #ifdef obj_frob_section |
| obj_frob_section (sec); |
| #endif |
| } |
| |
| #ifdef DEBUG2 |
| static void |
| dump_section_relocs (abfd, sec, stream_) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| asection *sec; |
| char *stream_; |
| { |
| FILE *stream = (FILE *) stream_; |
| segment_info_type *seginfo = seg_info (sec); |
| fixS *fixp = seginfo->fix_root; |
| |
| if (!fixp) |
| return; |
| |
| fprintf (stream, "sec %s relocs:\n", sec->name); |
| while (fixp) |
| { |
| symbolS *s = fixp->fx_addsy; |
| |
| fprintf (stream, " %08lx: type %d ", (unsigned long) fixp, |
| (int) fixp->fx_r_type); |
| if (s == NULL) |
| fprintf (stream, "no sym\n"); |
| else |
| { |
| print_symbol_value_1 (stream, s); |
| fprintf (stream, "\n"); |
| } |
| fixp = fixp->fx_next; |
| } |
| } |
| #else |
| #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0) |
| #endif |
| |
| #ifndef EMIT_SECTION_SYMBOLS |
| #define EMIT_SECTION_SYMBOLS 1 |
| #endif |
| |
| static void |
| adjust_reloc_syms (abfd, sec, xxx) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| asection *sec; |
| PTR xxx ATTRIBUTE_UNUSED; |
| { |
| segment_info_type *seginfo = seg_info (sec); |
| fixS *fixp; |
| |
| if (seginfo == NULL) |
| return; |
| |
| dump_section_relocs (abfd, sec, stderr); |
| |
| for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) |
| if (fixp->fx_done) |
| /* Ignore it. */ |
| ; |
| else if (fixp->fx_addsy) |
| { |
| symbolS *sym; |
| asection *symsec; |
| |
| #ifdef DEBUG5 |
| fprintf (stderr, "\n\nadjusting fixup:\n"); |
| print_fixup (fixp); |
| #endif |
| |
| sym = fixp->fx_addsy; |
| |
| /* All symbols should have already been resolved at this |
| point. It is possible to see unresolved expression |
| symbols, though, since they are not in the regular symbol |
| table. */ |
| if (sym != NULL) |
| resolve_symbol_value (sym); |
| |
| if (fixp->fx_subsy != NULL) |
| resolve_symbol_value (fixp->fx_subsy); |
| |
| /* If this symbol is equated to an undefined symbol, convert |
| the fixup to being against that symbol. */ |
| if (sym != NULL && symbol_equated_reloc_p (sym)) |
| { |
| fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
| sym = symbol_get_value_expression (sym)->X_add_symbol; |
| fixp->fx_addsy = sym; |
| } |
| |
| if (sym != NULL && symbol_mri_common_p (sym)) |
| { |
| /* These symbols are handled specially in fixup_segment. */ |
| goto done; |
| } |
| |
| symsec = S_GET_SEGMENT (sym); |
| |
| if (symsec == NULL) |
| abort (); |
| |
| if (bfd_is_abs_section (symsec)) |
| { |
| /* The fixup_segment routine will not use this symbol in a |
| relocation unless TC_FORCE_RELOCATION returns 1. */ |
| if (TC_FORCE_RELOCATION (fixp)) |
| { |
| symbol_mark_used_in_reloc (fixp->fx_addsy); |
| #ifdef UNDEFINED_DIFFERENCE_OK |
| if (fixp->fx_subsy != NULL) |
| symbol_mark_used_in_reloc (fixp->fx_subsy); |
| #endif |
| } |
| goto done; |
| } |
| |
| /* If it's one of these sections, assume the symbol is |
| definitely going to be output. The code in |
| md_estimate_size_before_relax in tc-mips.c uses this test |
| as well, so if you change this code you should look at that |
| code. */ |
| if (bfd_is_und_section (symsec) |
| || bfd_is_com_section (symsec)) |
| { |
| symbol_mark_used_in_reloc (fixp->fx_addsy); |
| #ifdef UNDEFINED_DIFFERENCE_OK |
| /* We have the difference of an undefined symbol and some |
| other symbol. Make sure to mark the other symbol as used |
| in a relocation so that it will always be output. */ |
| if (fixp->fx_subsy) |
| symbol_mark_used_in_reloc (fixp->fx_subsy); |
| #endif |
| goto done; |
| } |
| |
| /* Don't try to reduce relocs which refer to non-local symbols |
| in .linkonce sections. It can lead to confusion when a |
| debugging section refers to a .linkonce section. I hope |
| this will always be correct. */ |
| if (symsec != sec && ! S_IS_LOCAL (sym)) |
| { |
| boolean linkonce; |
| |
| linkonce = false; |
| #ifdef BFD_ASSEMBLER |
| if ((bfd_get_section_flags (stdoutput, symsec) & SEC_LINK_ONCE) |
| != 0) |
| linkonce = true; |
| #endif |
| #ifdef OBJ_ELF |
| /* The GNU toolchain uses an extension for ELF: a section |
| beginning with the magic string .gnu.linkonce is a |
| linkonce section. */ |
| if (strncmp (segment_name (symsec), ".gnu.linkonce", |
| sizeof ".gnu.linkonce" - 1) == 0) |
| linkonce = true; |
| #endif |
| |
| if (linkonce) |
| { |
| symbol_mark_used_in_reloc (fixp->fx_addsy); |
| #ifdef UNDEFINED_DIFFERENCE_OK |
| if (fixp->fx_subsy != NULL) |
| symbol_mark_used_in_reloc (fixp->fx_subsy); |
| #endif |
| goto done; |
| } |
| } |
| |
| /* Since we're reducing to section symbols, don't attempt to reduce |
| anything that's already using one. */ |
| if (symbol_section_p (sym)) |
| { |
| symbol_mark_used_in_reloc (fixp->fx_addsy); |
| goto done; |
| } |
| |
| #ifdef BFD_ASSEMBLER |
| /* We can never adjust a reloc against a weak symbol. If we |
| did, and the weak symbol was overridden by a real symbol |
| somewhere else, then our relocation would be pointing at |
| the wrong area of memory. */ |
| if (S_IS_WEAK (sym)) |
| { |
| symbol_mark_used_in_reloc (fixp->fx_addsy); |
| goto done; |
| } |
| |
| /* Never adjust a reloc against local symbol in a merge section |
| with non-zero addend. */ |
| if ((symsec->flags & SEC_MERGE) != 0 |
| && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL)) |
| { |
| symbol_mark_used_in_reloc (fixp->fx_addsy); |
| goto done; |
| } |
| |
| /* Never adjust a reloc against TLS local symbol. */ |
| if (symsec->flags & SEC_THREAD_LOCAL) |
| { |
| symbol_mark_used_in_reloc (fixp->fx_addsy); |
| goto done; |
| } |
| #endif |
| |
| /* Is there some other reason we can't adjust this one? (E.g., |
| call/bal links in i960-bout symbols.) */ |
| #ifdef obj_fix_adjustable |
| if (! obj_fix_adjustable (fixp)) |
| { |
| symbol_mark_used_in_reloc (fixp->fx_addsy); |
| goto done; |
| } |
| #endif |
| |
| /* Is there some other (target cpu dependent) reason we can't adjust |
| this one? (E.g. relocations involving function addresses on |
| the PA. */ |
| #ifdef tc_fix_adjustable |
| if (! tc_fix_adjustable (fixp)) |
| { |
| symbol_mark_used_in_reloc (fixp->fx_addsy); |
| goto done; |
| } |
| #endif |
| |
| /* If the section symbol isn't going to be output, the relocs |
| at least should still work. If not, figure out what to do |
| when we run into that case. |
| |
| We refetch the segment when calling section_symbol, rather |
| than using symsec, because S_GET_VALUE may wind up changing |
| the section when it calls resolve_symbol_value. */ |
| fixp->fx_offset += S_GET_VALUE (sym); |
| fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym)); |
| symbol_mark_used_in_reloc (fixp->fx_addsy); |
| #ifdef DEBUG5 |
| fprintf (stderr, "\nadjusted fixup:\n"); |
| print_fixup (fixp); |
| #endif |
| |
| done: |
| ; |
| } |
| #if 1 /* def RELOC_REQUIRES_SYMBOL */ |
| else |
| { |
| /* There was no symbol required by this relocation. However, |
| BFD doesn't really handle relocations without symbols well. |
| (At least, the COFF support doesn't.) So for now we fake up |
| a local symbol in the absolute section. */ |
| |
| fixp->fx_addsy = section_symbol (absolute_section); |
| #if 0 |
| fixp->fx_addsy->sy_used_in_reloc = 1; |
| #endif |
| } |
| #endif |
| |
| dump_section_relocs (abfd, sec, stderr); |
| } |
| |
| static void |
| write_relocs (abfd, sec, xxx) |
| bfd *abfd; |
| asection *sec; |
| PTR xxx ATTRIBUTE_UNUSED; |
| { |
| segment_info_type *seginfo = seg_info (sec); |
| unsigned int i; |
| unsigned int n; |
| arelent **relocs; |
| fixS *fixp; |
| char *err; |
| |
| /* If seginfo is NULL, we did not create this section; don't do |
| anything with it. */ |
| if (seginfo == NULL) |
| return; |
| |
| fixup_segment (seginfo->fix_root, sec); |
| |
| n = 0; |
| for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) |
| n++; |
| |
| #ifndef RELOC_EXPANSION_POSSIBLE |
| /* Set up reloc information as well. */ |
| relocs = (arelent **) xmalloc (n * sizeof (arelent *)); |
| memset ((char *) relocs, 0, n * sizeof (arelent *)); |
| |
| i = 0; |
| for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) |
| { |
| arelent *reloc; |
| bfd_reloc_status_type s; |
| symbolS *sym; |
| |
| if (fixp->fx_done) |
| { |
| n--; |
| continue; |
| } |
| |
| /* If this is an undefined symbol which was equated to another |
| symbol, then generate the reloc against the latter symbol |
| rather than the former. */ |
| sym = fixp->fx_addsy; |
| while (symbol_equated_reloc_p (sym)) |
| { |
| symbolS *n; |
| |
| /* We must avoid looping, as that can occur with a badly |
| written program. */ |
| n = symbol_get_value_expression (sym)->X_add_symbol; |
| if (n == sym) |
| break; |
| fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
| sym = n; |
| } |
| fixp->fx_addsy = sym; |
| |
| reloc = tc_gen_reloc (sec, fixp); |
| if (!reloc) |
| { |
| n--; |
| continue; |
| } |
| |
| #if 0 |
| /* This test is triggered inappropriately for the SH. */ |
| if (fixp->fx_where + fixp->fx_size |
| > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) |
| abort (); |
| #endif |
| |
| s = bfd_install_relocation (stdoutput, reloc, |
| fixp->fx_frag->fr_literal, |
| fixp->fx_frag->fr_address, |
| sec, &err); |
| switch (s) |
| { |
| case bfd_reloc_ok: |
| break; |
| case bfd_reloc_overflow: |
| as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation overflow")); |
| break; |
| case bfd_reloc_outofrange: |
| as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation out of range")); |
| break; |
| default: |
| as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), |
| fixp->fx_file, fixp->fx_line, s); |
| } |
| relocs[i++] = reloc; |
| } |
| #else |
| n = n * MAX_RELOC_EXPANSION; |
| /* Set up reloc information as well. */ |
| relocs = (arelent **) xmalloc (n * sizeof (arelent *)); |
| |
| i = 0; |
| for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) |
| { |
| arelent **reloc; |
| char *data; |
| bfd_reloc_status_type s; |
| symbolS *sym; |
| int j; |
| |
| if (fixp->fx_done) |
| { |
| n--; |
| continue; |
| } |
| |
| /* If this is an undefined symbol which was equated to another |
| symbol, then generate the reloc against the latter symbol |
| rather than the former. */ |
| sym = fixp->fx_addsy; |
| while (symbol_equated_reloc_p (sym)) |
| sym = symbol_get_value_expression (sym)->X_add_symbol; |
| fixp->fx_addsy = sym; |
| |
| reloc = tc_gen_reloc (sec, fixp); |
| |
| for (j = 0; reloc[j]; j++) |
| { |
| relocs[i++] = reloc[j]; |
| assert (i <= n); |
| } |
| data = fixp->fx_frag->fr_literal + fixp->fx_where; |
| if (fixp->fx_where + fixp->fx_size |
| > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) |
| as_bad_where (fixp->fx_file, fixp->fx_line, |
| _("internal error: fixup not contained within frag")); |
| for (j = 0; reloc[j]; j++) |
| { |
| s = bfd_install_relocation (stdoutput, reloc[j], |
| fixp->fx_frag->fr_literal, |
| fixp->fx_frag->fr_address, |
| sec, &err); |
| switch (s) |
| { |
| case bfd_reloc_ok: |
| break; |
| case bfd_reloc_overflow: |
| as_bad_where (fixp->fx_file, fixp->fx_line, |
| _("relocation overflow")); |
| break; |
| default: |
| as_fatal (_("%s:%u: bad return from bfd_install_relocation"), |
| fixp->fx_file, fixp->fx_line); |
| } |
| } |
| } |
| n = i; |
| #endif |
| |
| #ifdef DEBUG4 |
| { |
| int i, j, nsyms; |
| asymbol **sympp; |
| sympp = bfd_get_outsymbols (stdoutput); |
| nsyms = bfd_get_symcount (stdoutput); |
| for (i = 0; i < n; i++) |
| if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) |
| { |
| for (j = 0; j < nsyms; j++) |
| if (sympp[j] == *relocs[i]->sym_ptr_ptr) |
| break; |
| if (j == nsyms) |
| abort (); |
| } |
| } |
| #endif |
| |
| if (n) |
| bfd_set_reloc (stdoutput, sec, relocs, n); |
| else |
| bfd_set_section_flags (abfd, sec, |
| (bfd_get_section_flags (abfd, sec) |
| & (flagword) ~SEC_RELOC)); |
| |
| #ifdef SET_SECTION_RELOCS |
| SET_SECTION_RELOCS (sec, relocs, n); |
| #endif |
| |
| #ifdef DEBUG3 |
| { |
| int i; |
| arelent *r; |
| asymbol *s; |
| fprintf (stderr, "relocs for sec %s\n", sec->name); |
| for (i = 0; i < n; i++) |
| { |
| r = relocs[i]; |
| s = *r->sym_ptr_ptr; |
| fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n", |
| i, r, r->address, s->name, r->addend); |
| } |
| } |
| #endif |
| } |
| |
| static void |
| write_contents (abfd, sec, xxx) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| asection *sec; |
| PTR xxx ATTRIBUTE_UNUSED; |
| { |
| segment_info_type *seginfo = seg_info (sec); |
| unsigned long offset = 0; |
| fragS *f; |
| |
| /* Write out the frags. */ |
| if (seginfo == NULL |
| || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) |
| return; |
| |
| for (f = seginfo->frchainP->frch_root; |
| f; |
| f = f->fr_next) |
| { |
| int x; |
| unsigned long fill_size; |
| char *fill_literal; |
| long count; |
| |
| assert (f->fr_type == rs_fill); |
| if (f->fr_fix) |
| { |
| x = bfd_set_section_contents (stdoutput, sec, |
| f->fr_literal, (file_ptr) offset, |
| (bfd_size_type) f->fr_fix); |
| if (x == false) |
| { |
| bfd_perror (stdoutput->filename); |
| as_perror (_("FATAL: Can't write %s"), stdoutput->filename); |
| exit (EXIT_FAILURE); |
| } |
| offset += f->fr_fix; |
| } |
| fill_literal = f->fr_literal + f->fr_fix; |
| fill_size = f->fr_var; |
| count = f->fr_offset; |
| assert (count >= 0); |
| if (fill_size && count) |
| { |
| char buf[256]; |
| if (fill_size > sizeof (buf)) |
| { |
| /* Do it the old way. Can this ever happen? */ |
| while (count--) |
| { |
| x = bfd_set_section_contents (stdoutput, sec, |
| fill_literal, |
| (file_ptr) offset, |
| (bfd_size_type) fill_size); |
| if (x == false) |
| { |
| bfd_perror (stdoutput->filename); |
| as_perror (_("FATAL: Can't write %s"), |
| stdoutput->filename); |
| exit (EXIT_FAILURE); |
| } |
| offset += fill_size; |
| } |
| } |
| else |
| { |
| /* Build a buffer full of fill objects and output it as |
| often as necessary. This saves on the overhead of |
| potentially lots of bfd_set_section_contents calls. */ |
| int n_per_buf, i; |
| if (fill_size == 1) |
| { |
| n_per_buf = sizeof (buf); |
| memset (buf, *fill_literal, n_per_buf); |
| } |
| else |
| { |
| char *bufp; |
| n_per_buf = sizeof (buf) / fill_size; |
| for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) |
| memcpy (bufp, fill_literal, fill_size); |
| } |
| for (; count > 0; count -= n_per_buf) |
| { |
| n_per_buf = n_per_buf > count ? count : n_per_buf; |
| x = bfd_set_section_contents |
| (stdoutput, sec, buf, (file_ptr) offset, |
| (bfd_size_type) n_per_buf * fill_size); |
| if (x != true) |
| as_fatal (_("cannot write to output file")); |
| offset += n_per_buf * fill_size; |
| } |
| } |
| } |
| } |
| } |
| #endif |
| |
| #if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT)) |
| static void |
| merge_data_into_text () |
| { |
| #if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS) |
| seg_info (text_section)->frchainP->frch_last->fr_next = |
| seg_info (data_section)->frchainP->frch_root; |
| seg_info (text_section)->frchainP->frch_last = |
| seg_info (data_section)->frchainP->frch_last; |
| seg_info (data_section)->frchainP = 0; |
| #else |
| fixS *tmp; |
| |
| text_last_frag->fr_next = data_frag_root; |
| text_last_frag = data_last_frag; |
| data_last_frag = NULL; |
| data_frag_root = NULL; |
| if (text_fix_root) |
| { |
| for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);; |
| tmp->fx_next = data_fix_root; |
| text_fix_tail = data_fix_tail; |
| } |
| else |
| text_fix_root = data_fix_root; |
| data_fix_root = NULL; |
| #endif |
| } |
| #endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */ |
| |
| #if !defined (BFD_ASSEMBLER) && !defined (BFD) |
| static void |
| relax_and_size_all_segments () |
| { |
| fragS *fragP; |
| |
| relax_segment (text_frag_root, SEG_TEXT); |
| relax_segment (data_frag_root, SEG_DATA); |
| relax_segment (bss_frag_root, SEG_BSS); |
| |
| /* Now the addresses of frags are correct within the segment. */ |
| know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0); |
| H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address); |
| text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers); |
| |
| /* Join the 2 segments into 1 huge segment. |
| To do this, re-compute every rn_address in the SEG_DATA frags. |
| Then join the data frags after the text frags. |
| |
| Determine a_data [length of data segment]. */ |
| if (data_frag_root) |
| { |
| register relax_addressT slide; |
| |
| know ((text_last_frag->fr_type == rs_fill) |
| && (text_last_frag->fr_offset == 0)); |
| |
| H_SET_DATA_SIZE (&headers, data_last_frag->fr_address); |
| data_last_frag->fr_address = H_GET_DATA_SIZE (&headers); |
| slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */ |
| #ifdef OBJ_BOUT |
| #define RoundUp(N,S) (((N)+(S)-1)&-(S)) |
| /* For b.out: If the data section has a strict alignment |
| requirement, its load address in the .o file will be |
| rounded up from the size of the text section. These |
| two values are *not* the same! Similarly for the bss |
| section.... */ |
| slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]); |
| #endif |
| |
| for (fragP = data_frag_root; fragP; fragP = fragP->fr_next) |
| fragP->fr_address += slide; |
| |
| know (text_last_frag != 0); |
| text_last_frag->fr_next = data_frag_root; |
| } |
| else |
| { |
| H_SET_DATA_SIZE (&headers, 0); |
| } |
| |
| #ifdef OBJ_BOUT |
| /* See above comments on b.out data section address. */ |
| { |
| long bss_vma; |
| if (data_last_frag == 0) |
| bss_vma = H_GET_TEXT_SIZE (&headers); |
| else |
| bss_vma = data_last_frag->fr_address; |
| bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]); |
| bss_address_frag.fr_address = bss_vma; |
| } |
| #else /* ! OBJ_BOUT */ |
| bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) + |
| H_GET_DATA_SIZE (&headers)); |
| |
| #endif /* ! OBJ_BOUT */ |
| |
| /* Slide all the frags. */ |
| if (bss_frag_root) |
| { |
| relax_addressT slide = bss_address_frag.fr_address; |
| |
| for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next) |
| fragP->fr_address += slide; |
| } |
| |
| if (bss_last_frag) |
| H_SET_BSS_SIZE (&headers, |
| bss_last_frag->fr_address - bss_frag_root->fr_address); |
| else |
| H_SET_BSS_SIZE (&headers, 0); |
| } |
| #endif /* ! BFD_ASSEMBLER && ! BFD */ |
| |
| #if defined (BFD_ASSEMBLER) || !defined (BFD) |
| |
| #ifdef BFD_ASSEMBLER |
| static void |
| set_symtab () |
| { |
| int nsyms; |
| asymbol **asympp; |
| symbolS *symp; |
| boolean result; |
| extern PTR bfd_alloc PARAMS ((bfd *, bfd_size_type)); |
| |
| /* Count symbols. We can't rely on a count made by the loop in |
| write_object_file, because *_frob_file may add a new symbol or |
| two. */ |
| nsyms = 0; |
| for (symp = symbol_rootP; symp; symp = symbol_next (symp)) |
| nsyms++; |
| |
| if (nsyms) |
| { |
| int i; |
| bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *); |
| |
| asympp = (asymbol **) bfd_alloc (stdoutput, amt); |
| symp = symbol_rootP; |
| for (i = 0; i < nsyms; i++, symp = symbol_next (symp)) |
| { |
| asympp[i] = symbol_get_bfdsym (symp); |
| symbol_mark_written (symp); |
| } |
| } |
| else |
| asympp = 0; |
| result = bfd_set_symtab (stdoutput, asympp, nsyms); |
| assert (result == true); |
| symbol_table_frozen = 1; |
| } |
| #endif |
| |
| /* Finish the subsegments. After every sub-segment, we fake an |
| ".align ...". This conforms to BSD4.2 brane-damage. We then fake |
| ".fill 0" because that is the kind of frag that requires least |
| thought. ".align" frags like to have a following frag since that |
| makes calculating their intended length trivial. */ |
| |
| #ifndef SUB_SEGMENT_ALIGN |
| #ifdef HANDLE_ALIGN |
| /* The last subsegment gets an aligment corresponding to the alignment |
| of the section. This allows proper nop-filling at the end of |
| code-bearing sections. */ |
| #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ |
| (!(FRCHAIN)->frch_next || (FRCHAIN)->frch_next->frch_seg != (SEG) \ |
| ? get_recorded_alignment (SEG) : 0) |
| #else |
| #ifdef BFD_ASSEMBLER |
| #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 |
| #else |
| #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 2 |
| #endif |
| #endif |
| #endif |
| |
| void |
| subsegs_finish () |
| { |
| struct frchain *frchainP; |
| |
| for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) |
| { |
| int alignment = 0; |
| |
| subseg_set (frchainP->frch_seg, frchainP->frch_subseg); |
| |
| /* This now gets called even if we had errors. In that case, |
| any alignment is meaningless, and, moreover, will look weird |
| if we are generating a listing. */ |
| if (!had_errors ()) |
| alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP); |
| |
| if (subseg_text_p (now_seg)) |
| frag_align_code (alignment, 0); |
| else |
| frag_align (alignment, 0, 0); |
| |
| /* frag_align will have left a new frag. |
| Use this last frag for an empty ".fill". |
| |
| For this segment ... |
| Create a last frag. Do not leave a "being filled in frag". */ |
| frag_wane (frag_now); |
| frag_now->fr_fix = 0; |
| know (frag_now->fr_next == NULL); |
| } |
| } |
| |
| /* Write the object file. */ |
| |
| void |
| write_object_file () |
| { |
| #if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD) |
| fragS *fragP; /* Track along all frags. */ |
| #endif |
| |
| /* Do we really want to write it? */ |
| { |
| int n_warns, n_errs; |
| n_warns = had_warnings (); |
| n_errs = had_errors (); |
| /* The -Z flag indicates that an object file should be generated, |
| regardless of warnings and errors. */ |
| if (flag_always_generate_output) |
| { |
| if (n_warns || n_errs) |
| as_warn (_("%d error%s, %d warning%s, generating bad object file"), |
| n_errs, n_errs == 1 ? "" : "s", |
| n_warns, n_warns == 1 ? "" : "s"); |
| } |
| else |
| { |
| if (n_errs) |
| as_fatal (_("%d error%s, %d warning%s, no object file generated"), |
| n_errs, n_errs == 1 ? "" : "s", |
| n_warns, n_warns == 1 ? "" : "s"); |
| } |
| } |
| |
| #ifdef OBJ_VMS |
| /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call |
| a routine to check for the definition of the procedure "_main", |
| and if so -- fix it up so that it can be program entry point. */ |
| vms_check_for_main (); |
| #endif /* OBJ_VMS */ |
| |
| /* From now on, we don't care about sub-segments. Build one frag chain |
| for each segment. Linked thru fr_next. */ |
| |
| #ifdef BFD_ASSEMBLER |
| /* Remove the sections created by gas for its own purposes. */ |
| { |
| asection **seclist; |
| int i; |
| |
| seclist = &stdoutput->sections; |
| while (*seclist) |
| { |
| if (*seclist == reg_section || *seclist == expr_section) |
| { |
| bfd_section_list_remove (stdoutput, seclist); |
| stdoutput->section_count--; |
| } |
| else |
| seclist = &(*seclist)->next; |
| } |
| i = 0; |
| bfd_map_over_sections (stdoutput, renumber_sections, &i); |
| } |
| |
| bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); |
| #else |
| remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag); |
| remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag); |
| remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag); |
| #endif |
| |
| /* We have two segments. If user gave -R flag, then we must put the |
| data frags into the text segment. Do this before relaxing so |
| we know to take advantage of -R and make shorter addresses. */ |
| #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER) |
| if (flag_readonly_data_in_text) |
| { |
| merge_data_into_text (); |
| } |
| #endif |
| |
| #ifdef BFD_ASSEMBLER |
| while (1) |
| { |
| int changed; |
| |
| #ifndef WORKING_DOT_WORD |
| /* We need to reset the markers in the broken word list and |
| associated frags between calls to relax_segment (via |
| relax_seg). Since the broken word list is global, we do it |
| once per round, rather than locally in relax_segment for each |
| segment. */ |
| struct broken_word *brokp; |
| |
| for (brokp = broken_words; |
| brokp != (struct broken_word *) NULL; |
| brokp = brokp->next_broken_word) |
| { |
| brokp->added = 0; |
| |
| if (brokp->dispfrag != (fragS *) NULL |
| && brokp->dispfrag->fr_type == rs_broken_word) |
| brokp->dispfrag->fr_subtype = 0; |
| } |
| #endif |
| |
| changed = 0; |
| bfd_map_over_sections (stdoutput, relax_seg, &changed); |
| if (!changed) |
| break; |
| } |
| |
| /* Note - Most ports will use the default value of |
| TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force |
| local symbols to be resolved, removing their frag information. |
| Some ports however, will not have finished relaxing all of |
| their frags and will still need the local symbol frag |
| information. These ports can set |
| TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */ |
| finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG; |
| |
| bfd_map_over_sections (stdoutput, size_seg, (char *) 0); |
| #else |
| relax_and_size_all_segments (); |
| #endif /* BFD_ASSEMBLER */ |
| |
| /* Relaxation has completed. Freeze all syms. */ |
| finalize_syms = 1; |
| |
| #ifndef BFD_ASSEMBLER |
| /* Crawl the symbol chain. |
| |
| For each symbol whose value depends on a frag, take the address of |
| that frag and subsume it into the value of the symbol. |
| After this, there is just one way to lookup a symbol value. |
| Values are left in their final state for object file emission. |
| We adjust the values of 'L' local symbols, even if we do |
| not intend to emit them to the object file, because their values |
| are needed for fix-ups. |
| |
| Unless we saw a -L flag, remove all symbols that begin with 'L' |
| from the symbol chain. (They are still pointed to by the fixes.) |
| |
| Count the remaining symbols. |
| Assign a symbol number to each symbol. |
| Count the number of string-table chars we will emit. |
| Put this info into the headers as appropriate. */ |
| know (zero_address_frag.fr_address == 0); |
| string_byte_count = sizeof (string_byte_count); |
| |
| obj_crawl_symbol_chain (&headers); |
| |
| if (string_byte_count == sizeof (string_byte_count)) |
| string_byte_count = 0; |
| |
| H_SET_STRING_SIZE (&headers, string_byte_count); |
| |
| /* Addresses of frags now reflect addresses we use in the object file. |
| Symbol values are correct. |
| Scan the frags, converting any ".org"s and ".align"s to ".fill"s. |
| Also converting any machine-dependent frags using md_convert_frag(); */ |
| subseg_change (SEG_TEXT, 0); |
| |
| for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) |
| { |
| /* At this point we have linked all the frags into a single |
| chain. However, cvt_frag_to_fill may call md_convert_frag |
| which may call fix_new. We need to ensure that fix_new adds |
| the fixup to the right section. */ |
| if (fragP == data_frag_root) |
| subseg_change (SEG_DATA, 0); |
| |
| cvt_frag_to_fill (&headers, SEG_TEXT, fragP); |
| |
| /* Some assert macros don't work with # directives mixed in. */ |
| #ifndef NDEBUG |
| if (!(fragP->fr_next == NULL |
| #ifdef OBJ_BOUT |
| || fragP->fr_next == data_frag_root |
| #endif |
| || ((fragP->fr_next->fr_address - fragP->fr_address) |
| == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var)))) |
| abort (); |
| #endif |
| } |
| #endif /* ! BFD_ASSEMBLER */ |
| |
| #ifndef WORKING_DOT_WORD |
| { |
| struct broken_word *lie; |
| struct broken_word **prevP; |
| |
| prevP = &broken_words; |
| for (lie = broken_words; lie; lie = lie->next_broken_word) |
| if (!lie->added) |
| { |
| expressionS exp; |
| |
| subseg_change (lie->seg, lie->subseg); |
| exp.X_op = O_subtract; |
| exp.X_add_symbol = lie->add; |
| exp.X_op_symbol = lie->sub; |
| exp.X_add_number = lie->addnum; |
| #ifdef BFD_ASSEMBLER |
| #ifdef TC_CONS_FIX_NEW |
| TC_CONS_FIX_NEW (lie->frag, |
| lie->word_goes_here - lie->frag->fr_literal, |
| 2, &exp); |
| #else |
| fix_new_exp (lie->frag, |
| lie->word_goes_here - lie->frag->fr_literal, |
| 2, &exp, 0, BFD_RELOC_16); |
| #endif |
| #else |
| #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE) |
| fix_new_exp (lie->frag, |
| lie->word_goes_here - lie->frag->fr_literal, |
| 2, &exp, 0, NO_RELOC); |
| #else |
| #ifdef TC_NS32K |
| fix_new_ns32k_exp (lie->frag, |
| lie->word_goes_here - lie->frag->fr_literal, |
| 2, &exp, 0, 0, 2, 0, 0); |
| #else |
| fix_new_exp (lie->frag, |
| lie->word_goes_here - lie->frag->fr_literal, |
| 2, &exp, 0, 0); |
| #endif /* TC_NS32K */ |
| #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */ |
| #endif /* BFD_ASSEMBLER */ |
| *prevP = lie->next_broken_word; |
| } |
| else |
| prevP = &(lie->next_broken_word); |
| |
| for (lie = broken_words; lie;) |
| { |
| struct broken_word *untruth; |
| char *table_ptr; |
| addressT table_addr; |
| addressT from_addr, to_addr; |
| int n, m; |
| |
| subseg_change (lie->seg, lie->subseg); |
| fragP = lie->dispfrag; |
| |
| /* Find out how many broken_words go here. */ |
| n = 0; |
| for (untruth = lie; |
| untruth && untruth->dispfrag == fragP; |
| untruth = untruth->next_broken_word) |
| if (untruth->added == 1) |
| n++; |
| |
| table_ptr = lie->dispfrag->fr_opcode; |
| table_addr = (lie->dispfrag->fr_address |
| + (table_ptr - lie->dispfrag->fr_literal)); |
| /* Create the jump around the long jumps. This is a short |
| jump from table_ptr+0 to table_ptr+n*long_jump_size. */ |
| from_addr = table_addr; |
| to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; |
| md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
| lie->add); |
| table_ptr += md_short_jump_size; |
| table_addr += md_short_jump_size; |
| |
| for (m = 0; |
| lie && lie->dispfrag == fragP; |
| m++, lie = lie->next_broken_word) |
| { |
| if (lie->added == 2) |
| continue; |
| /* Patch the jump table. */ |
| /* This is the offset from ??? to table_ptr+0. */ |
| to_addr = table_addr - S_GET_VALUE (lie->sub); |
| #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD |
| TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_addr, lie); |
| #endif |
| md_number_to_chars (lie->word_goes_here, to_addr, 2); |
| for (untruth = lie->next_broken_word; |
| untruth && untruth->dispfrag == fragP; |
| untruth = untruth->next_broken_word) |
| { |
| if (untruth->use_jump == lie) |
| md_number_to_chars (untruth->word_goes_here, to_addr, 2); |
| } |
| |
| /* Install the long jump. */ |
| /* This is a long jump from table_ptr+0 to the final target. */ |
| from_addr = table_addr; |
| to_addr = S_GET_VALUE (lie->add) + lie->addnum; |
| md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
| lie->add); |
| table_ptr += md_long_jump_size; |
| table_addr += md_long_jump_size; |
| } |
| } |
| } |
| #endif /* not WORKING_DOT_WORD */ |
| |
| #ifndef BFD_ASSEMBLER |
| #ifndef OBJ_VMS |
| { /* not vms */ |
| char *the_object_file; |
| long object_file_size; |
| /* Scan every FixS performing fixups. We had to wait until now to |
| do this because md_convert_frag() may have made some fixSs. */ |
| int trsize, drsize; |
| |
| subseg_change (SEG_TEXT, 0); |
| trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT); |
| subseg_change (SEG_DATA, 0); |
| drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA); |
| H_SET_RELOCATION_SIZE (&headers, trsize, drsize); |
| |
| /* FIXME: Move this stuff into the pre-write-hook. */ |
| H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file); |
| H_SET_ENTRY_POINT (&headers, 0); |
| |
| obj_pre_write_hook (&headers); /* Extra coff stuff. */ |
| |
| object_file_size = H_GET_FILE_SIZE (&headers); |
| next_object_file_charP = the_object_file = xmalloc (object_file_size); |
| |
| output_file_create (out_file_name); |
| |
| obj_header_append (&next_object_file_charP, &headers); |
| |
| know ((next_object_file_charP - the_object_file) |
| == H_GET_HEADER_SIZE (&headers)); |
| |
| /* Emit code. */ |
| for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) |
| { |
| register long count; |
| register char *fill_literal; |
| register long fill_size; |
| |
| PROGRESS (1); |
| know (fragP->fr_type == rs_fill); |
| append (&next_object_file_charP, fragP->fr_literal, |
| (unsigned long) fragP->fr_fix); |
| fill_literal = fragP->fr_literal + fragP->fr_fix; |
| fill_size = fragP->fr_var; |
| know (fragP->fr_offset >= 0); |
| |
| for (count = fragP->fr_offset; count; count--) |
| append (&next_object_file_charP, fill_literal, |
| (unsigned long) fill_size); |
| } |
| |
| know ((next_object_file_charP - the_object_file) |
| == (H_GET_HEADER_SIZE (&headers) |
| + H_GET_TEXT_SIZE (&headers) |
| + H_GET_DATA_SIZE (&headers))); |
| |
| /* Emit relocations. */ |
| obj_emit_relocations (&next_object_file_charP, text_fix_root, |
| (relax_addressT) 0); |
| know ((next_object_file_charP - the_object_file) |
| == (H_GET_HEADER_SIZE (&headers) |
| + H_GET_TEXT_SIZE (&headers) |
| + H_GET_DATA_SIZE (&headers) |
| + H_GET_TEXT_RELOCATION_SIZE (&headers))); |
| #ifdef TC_I960 |
| /* Make addresses in data relocation directives relative to beginning of |
| first data fragment, not end of last text fragment: alignment of the |
| start of the data segment may place a gap between the segments. */ |
| obj_emit_relocations (&next_object_file_charP, data_fix_root, |
| data0_frchainP->frch_root->fr_address); |
| #else /* TC_I960 */ |
| obj_emit_relocations (&next_object_file_charP, data_fix_root, |
| text_last_frag->fr_address); |
| #endif /* TC_I960 */ |
| |
| know ((next_object_file_charP - the_object_file) |
| == (H_GET_HEADER_SIZE (&headers) |
| + H_GET_TEXT_SIZE (&headers) |
| + H_GET_DATA_SIZE (&headers) |
| + H_GET_TEXT_RELOCATION_SIZE (&headers) |
| + H_GET_DATA_RELOCATION_SIZE (&headers))); |
| |
| /* Emit line number entries. */ |
| OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file); |
| know ((next_object_file_charP - the_object_file) |
| == (H_GET_HEADER_SIZE (&headers) |
| + H_GET_TEXT_SIZE (&headers) |
| + H_GET_DATA_SIZE (&headers) |
| + H_GET_TEXT_RELOCATION_SIZE (&headers) |
| + H_GET_DATA_RELOCATION_SIZE (&headers) |
| + H_GET_LINENO_SIZE (&headers))); |
| |
| /* Emit symbols. */ |
| obj_emit_symbols (&next_object_file_charP, symbol_rootP); |
| know ((next_object_file_charP - the_object_file) |
| == (H_GET_HEADER_SIZE (&headers) |
| + H_GET_TEXT_SIZE (&headers) |
| + H_GET_DATA_SIZE (&headers) |
| + H_GET_TEXT_RELOCATION_SIZE (&headers) |
| + H_GET_DATA_RELOCATION_SIZE (&headers) |
| + H_GET_LINENO_SIZE (&headers) |
| + H_GET_SYMBOL_TABLE_SIZE (&headers))); |
| |
| /* Emit strings. */ |
| if (string_byte_count > 0) |
| obj_emit_strings (&next_object_file_charP); |
| |
| #ifdef BFD_HEADERS |
| bfd_seek (stdoutput, (file_ptr) 0, 0); |
| bfd_bwrite (the_object_file, (bfd_size_type) object_file_size, stdoutput); |
| #else |
| |
| /* Write the data to the file. */ |
| output_file_append (the_object_file, object_file_size, out_file_name); |
| free (the_object_file); |
| #endif |
| } |
| #else /* OBJ_VMS */ |
| /* Now do the VMS-dependent part of writing the object file. */ |
| vms_write_object_file (H_GET_TEXT_SIZE (&headers), |
| H_GET_DATA_SIZE (&headers), |
| H_GET_BSS_SIZE (&headers), |
| text_frag_root, data_frag_root); |
| #endif /* OBJ_VMS */ |
| #else /* BFD_ASSEMBLER */ |
| |
| /* Resolve symbol values. This needs to be done before processing |
| the relocations. */ |
| if (symbol_rootP) |
| { |
| symbolS *symp; |
| |
| for (symp = symbol_rootP; symp; symp = symbol_next (symp)) |
| resolve_symbol_value (symp); |
| } |
| resolve_local_symbol_values (); |
| |
| PROGRESS (1); |
| |
| #ifdef tc_frob_file_before_adjust |
| tc_frob_file_before_adjust (); |
| #endif |
| #ifdef obj_frob_file_before_adjust |
| obj_frob_file_before_adjust (); |
| #endif |
| |
| bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0); |
| |
| /* Set up symbol table, and write it out. */ |
| if (symbol_rootP) |
| { |
| symbolS *symp; |
| |
| for (symp = symbol_rootP; symp; symp = symbol_next (symp)) |
| { |
| int punt = 0; |
| const char *name; |
| |
| if (symbol_mri_common_p (symp)) |
| { |
| if (S_IS_EXTERNAL (symp)) |
| as_bad (_("%s: global symbols not supported in common sections"), |
| S_GET_NAME (symp)); |
| symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
| continue; |
| } |
| |
| name = S_GET_NAME (symp); |
| if (name) |
| { |
| const char *name2 = |
| decode_local_label_name ((char *) S_GET_NAME (symp)); |
| /* They only differ if `name' is a fb or dollar local |
| label name. */ |
| if (name2 != name && ! S_IS_DEFINED (symp)) |
| as_bad (_("local label `%s' is not defined"), name2); |
| } |
| |
| /* Do it again, because adjust_reloc_syms might introduce |
| more symbols. They'll probably only be section symbols, |
| but they'll still need to have the values computed. */ |
| resolve_symbol_value (symp); |
| |
| /* Skip symbols which were equated to undefined or common |
| symbols. */ |
| if (symbol_equated_reloc_p (symp)) |
| { |
| symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
| continue; |
| } |
| |
| /* So far, common symbols have been treated like undefined symbols. |
| Put them in the common section now. */ |
| if (S_IS_DEFINED (symp) == 0 |
| && S_GET_VALUE (symp) != 0) |
| S_SET_SEGMENT (symp, bfd_com_section_ptr); |
| #if 0 |
| printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n", |
| S_GET_NAME (symp), symp, |
| S_GET_VALUE (symp), |
| symbol_get_bfdsym (symp)->flags, |
| segment_name (S_GET_SEGMENT (symp))); |
| #endif |
| |
| #ifdef obj_frob_symbol |
| obj_frob_symbol (symp, punt); |
| #endif |
| #ifdef tc_frob_symbol |
| if (! punt || symbol_used_in_reloc_p (symp)) |
| tc_frob_symbol (symp, punt); |
| #endif |
| |
| /* If we don't want to keep this symbol, splice it out of |
| the chain now. If EMIT_SECTION_SYMBOLS is 0, we never |
| want section symbols. Otherwise, we skip local symbols |
| and symbols that the frob_symbol macros told us to punt, |
| but we keep such symbols if they are used in relocs. */ |
| if ((! EMIT_SECTION_SYMBOLS |
| && symbol_section_p (symp)) |
| /* Note that S_IS_EXTERN and S_IS_LOCAL are not always |
| opposites. Sometimes the former checks flags and the |
| latter examines the name... */ |
| || (!S_IS_EXTERN (symp) |
| && (S_IS_LOCAL (symp) || punt) |
| && ! symbol_used_in_reloc_p (symp))) |
| { |
| symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
| |
| /* After symbol_remove, symbol_next(symp) still returns |
| the one that came after it in the chain. So we don't |
| need to do any extra cleanup work here. */ |
| continue; |
| } |
| |
| /* Make sure we really got a value for the symbol. */ |
| if (! symbol_resolved_p (symp)) |
| { |
| as_bad (_("can't resolve value for symbol `%s'"), |
| S_GET_NAME (symp)); |
| symbol_mark_resolved (symp); |
| } |
| |
| /* Set the value into the BFD symbol. Up til now the value |
| has only been kept in the gas symbolS struct. */ |
| symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); |
| } |
| } |
| |
| PROGRESS (1); |
| |
| /* Now do any format-specific adjustments to the symbol table, such |
| as adding file symbols. */ |
| #ifdef tc_adjust_symtab |
| tc_adjust_symtab (); |
| #endif |
| #ifdef obj_adjust_symtab |
| obj_adjust_symtab (); |
| #endif |
| |
| /* Now that all the sizes are known, and contents correct, we can |
| start writing to the file. */ |
| set_symtab (); |
| |
| /* If *_frob_file changes the symbol value at this point, it is |
| responsible for moving the changed value into symp->bsym->value |
| as well. Hopefully all symbol value changing can be done in |
| *_frob_symbol. */ |
| #ifdef tc_frob_file |
| tc_frob_file (); |
| #endif |
| #ifdef obj_frob_file |
| obj_frob_file (); |
| #endif |
| |
| bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); |
| |
| #ifdef tc_frob_file_after_relocs |
| tc_frob_file_after_relocs (); |
| #endif |
| #ifdef obj_frob_file_after_relocs |
| obj_frob_file_after_relocs (); |
| #endif |
| |
| bfd_map_over_sections (stdoutput, write_contents, (char *) 0); |
| #endif /* BFD_ASSEMBLER */ |
| } |
| #endif /* ! BFD */ |
| |
| #ifdef TC_GENERIC_RELAX_TABLE |
| |
| /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ |
| |
| long |
| relax_frag (segment, fragP, stretch) |
| segT segment; |
| fragS *fragP; |
| long stretch; |
| { |
| const relax_typeS *this_type; |
| const relax_typeS *start_type; |
| relax_substateT next_state; |
| relax_substateT this_state; |
| long growth; |
| offsetT aim; |
| addressT target; |
| addressT address; |
| symbolS *symbolP; |
| const relax_typeS *table; |
| |
| target = fragP->fr_offset; |
| address = fragP->fr_address; |
| table = TC_GENERIC_RELAX_TABLE; |
| this_state = fragP->fr_subtype; |
| start_type = this_type = table + this_state; |
| symbolP = fragP->fr_symbol; |
| |
| if (symbolP) |
| { |
| fragS *sym_frag; |
| |
| sym_frag = symbol_get_frag (symbolP); |
| |
| #ifndef DIFF_EXPR_OK |
| #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
| know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) |
| || (S_GET_SEGMENT (symbolP) == SEG_DATA) |
| || (S_GET_SEGMENT (symbolP) == SEG_BSS) |
| || (S_GET_SEGMENT (symbolP) == SEG_TEXT)); |
| #endif |
| know (sym_frag != NULL); |
| #endif |
| know (!(S_GET_SEGMENT (symbolP) == absolute_section) |
| || sym_frag == &zero_address_frag); |
| target += S_GET_VALUE (symbolP); |
| |
| /* If frag has yet to be reached on this pass, |
| assume it will move by STRETCH just as we did. |
| If this is not so, it will be because some frag |
| between grows, and that will force another pass. */ |
| |
| if (stretch != 0 |
| && sym_frag->relax_marker != fragP->relax_marker |
| && S_GET_SEGMENT (symbolP) == segment) |
| { |
| target += stretch; |
| } |
| } |
| |
| aim = target - address - fragP->fr_fix; |
| #ifdef TC_PCREL_ADJUST |
| /* Currently only the ns32k family needs this. */ |
| aim += TC_PCREL_ADJUST (fragP); |
| /* #else */ |
| /* This machine doesn't want to use pcrel_adjust. |
| In that case, pcrel_adjust should be zero. */ |
| #if 0 |
| assert (fragP->fr_targ.ns32k.pcrel_adjust == 0); |
| #endif |
| #endif |
| #ifdef md_prepare_relax_scan /* formerly called M68K_AIM_KLUDGE */ |
| md_prepare_relax_scan (fragP, address, aim, this_state, this_type); |
| #endif |
| |
| if (aim < 0) |
| { |
| /* Look backwards. */ |
| for (next_state = this_type->rlx_more; next_state;) |
| if (aim >= this_type->rlx_backward) |
| next_state = 0; |
| else |
| { |
| /* Grow to next state. */ |
| this_state = next_state; |
| this_type = table + this_state; |
| next_state = this_type->rlx_more; |
| } |
| } |
| else |
| { |
| /* Look forwards. */ |
| for (next_state = this_type->rlx_more; next_state;) |
| if (aim <= this_type->rlx_forward) |
| next_state = 0; |
| else |
| { |
| /* Grow to next state. */ |
| this_state = next_state; |
| this_type = table + this_state; |
| next_state = this_type->rlx_more; |
| } |
| } |
| |
| growth = this_type->rlx_length - start_type->rlx_length; |
| if (growth != 0) |
| fragP->fr_subtype = this_state; |
| return growth; |
| } |
| |
| #endif /* defined (TC_GENERIC_RELAX_TABLE) */ |
| |
| /* Relax_align. Advance location counter to next address that has 'alignment' |
| lowest order bits all 0s, return size of adjustment made. */ |
| static relax_addressT |
| relax_align (address, alignment) |
| register relax_addressT address; /* Address now. */ |
| register int alignment; /* Alignment (binary). */ |
| { |
| relax_addressT mask; |
| relax_addressT new_address; |
| |
| mask = ~((~0) << alignment); |
| new_address = (address + mask) & (~mask); |
| #ifdef LINKER_RELAXING_SHRINKS_ONLY |
| if (linkrelax) |
| /* We must provide lots of padding, so the linker can discard it |
| when needed. The linker will not add extra space, ever. */ |
| new_address += (1 << alignment); |
| #endif |
| return (new_address - address); |
| } |
| |
| /* Now we have a segment, not a crowd of sub-segments, we can make |
| fr_address values. |
| |
| Relax the frags. |
| |
| After this, all frags in this segment have addresses that are correct |
| within the segment. Since segments live in different file addresses, |
| these frag addresses may not be the same as final object-file |
| addresses. */ |
| |
| int |
| relax_segment (segment_frag_root, segment) |
| struct frag *segment_frag_root; |
| segT segment; |
| { |
| register struct frag *fragP; |
| register relax_addressT address; |
| int ret; |
| |
| #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
| know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS); |
| #endif |
| /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
| subseg_change (segment, 0); |
| |
| /* For each frag in segment: count and store (a 1st guess of) |
| fr_address. */ |
| address = 0; |
| for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
| { |
| fragP->relax_marker = 0; |
| fragP->fr_address = address; |
| address += fragP->fr_fix; |
| |
| switch (fragP->fr_type) |
| { |
| case rs_fill: |
| address += fragP->fr_offset * fragP->fr_var; |
| break; |
| |
| case rs_align: |
| case rs_align_code: |
| case rs_align_test: |
| { |
| addressT offset = relax_align (address, (int) fragP->fr_offset); |
| |
| if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype) |
| offset = 0; |
| |
| if (offset % fragP->fr_var != 0) |
| { |
| as_bad_where (fragP->fr_file, fragP->fr_line, |
| _("alignment padding (%lu bytes) not a multiple of %ld"), |
| (unsigned long) offset, (long) fragP->fr_var); |
| offset -= (offset % fragP->fr_var); |
| } |
| |
| address += offset; |
| } |
| break; |
| |
| case rs_org: |
| case rs_space: |
| /* Assume .org is nugatory. It will grow with 1st relax. */ |
| break; |
| |
| case rs_machine_dependent: |
| /* If fr_symbol is an expression, this call to |
| resolve_symbol_value sets up the correct segment, which will |
| likely be needed in md_estimate_size_before_relax. */ |
| if (fragP->fr_symbol) |
| resolve_symbol_value (fragP->fr_symbol); |
| |
| address += md_estimate_size_before_relax (fragP, segment); |
| break; |
| |
| #ifndef WORKING_DOT_WORD |
| /* Broken words don't concern us yet. */ |
| case rs_broken_word: |
| break; |
| #endif |
| |
| case rs_leb128: |
| /* Initial guess is always 1; doing otherwise can result in |
| stable solutions that are larger than the minimum. */ |
| address += fragP->fr_offset = 1; |
| break; |
| |
| case rs_cfa: |
| address += eh_frame_estimate_size_before_relax (fragP); |
| break; |
| |
| case rs_dwarf2dbg: |
| address += dwarf2dbg_estimate_size_before_relax (fragP); |
| break; |
| |
| default: |
| BAD_CASE (fragP->fr_type); |
| break; |
| } |
| } |
| |
| /* Do relax(). */ |
| { |
| long stretch; /* May be any size, 0 or negative. */ |
| /* Cumulative number of addresses we have relaxed this pass. |
| We may have relaxed more than one address. */ |
| int stretched; /* Have we stretched on this pass? */ |
| /* This is 'cuz stretch may be zero, when, in fact some piece of code |
| grew, and another shrank. If a branch instruction doesn't fit anymore, |
| we could be scrod. */ |
| |
| do |
| { |
| stretch = 0; |
| stretched = 0; |
| |
| for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
| { |
| long growth = 0; |
| addressT was_address; |
| offsetT offset; |
| symbolS *symbolP; |
| |
| fragP->relax_marker ^= 1; |
| was_address = fragP->fr_address; |
| address = fragP->fr_address += stretch; |
| symbolP = fragP->fr_symbol; |
| offset = fragP->fr_offset; |
| |
| switch (fragP->fr_type) |
| { |
| case rs_fill: /* .fill never relaxes. */ |
| growth = 0; |
| break; |
| |
| #ifndef WORKING_DOT_WORD |
| /* JF: This is RMS's idea. I do *NOT* want to be blamed |
| for it I do not want to write it. I do not want to have |
| anything to do with it. This is not the proper way to |
| implement this misfeature. */ |
| case rs_broken_word: |
| { |
| struct broken_word *lie; |
| struct broken_word *untruth; |
| |
| /* Yes this is ugly (storing the broken_word pointer |
| in the symbol slot). Still, this whole chunk of |
| code is ugly, and I don't feel like doing anything |
| about it. Think of it as stubbornness in action. */ |
| growth = 0; |
| for (lie = (struct broken_word *) (fragP->fr_symbol); |
| lie && lie->dispfrag == fragP; |
| lie = lie->next_broken_word) |
| { |
| |
| if (lie->added) |
| continue; |
| |
| offset = (S_GET_VALUE (lie->add) |
| + lie->addnum |
| - S_GET_VALUE (lie->sub)); |
| if (offset <= -32768 || offset >= 32767) |
| { |
| if (flag_warn_displacement) |
| { |
| char buf[50]; |
| sprint_value (buf, (addressT) lie->addnum); |
| as_warn_where (fragP->fr_file, fragP->fr_line, |
| _(".word %s-%s+%s didn't fit"), |
| S_GET_NAME (lie->add), |
| S_GET_NAME (lie->sub), |
| buf); |
| } |
| lie->added = 1; |
| if (fragP->fr_subtype == 0) |
| { |
| fragP->fr_subtype++; |
| growth += md_short_jump_size; |
| } |
| for (untruth = lie->next_broken_word; |
| untruth && untruth->dispfrag == lie->dispfrag; |
| untruth = untruth->next_broken_word) |
| if ((symbol_get_frag (untruth->add) |
| == symbol_get_frag (lie->add)) |
| && (S_GET_VALUE (untruth->add) |
| == S_GET_VALUE (lie->add))) |
| { |
| untruth->added = 2; |
| untruth->use_jump = lie; |
| } |
| growth += md_long_jump_size; |
| } |
| } |
| |
| break; |
| } /* case rs_broken_word */ |
| #endif |
| case rs_align: |
| case rs_align_code: |
| case rs_align_test: |
| { |
| addressT oldoff, newoff; |
| |
| oldoff = relax_align (was_address + fragP->fr_fix, |
| (int) offset); |
| newoff = relax_align (address + fragP->fr_fix, |
| (int) offset); |
| |
| if (fragP->fr_subtype != 0) |
| { |
| if (oldoff > fragP->fr_subtype) |
| oldoff = 0; |
| if (newoff > fragP->fr_subtype) |
| newoff = 0; |
| } |
| |
| growth = newoff - oldoff; |
| } |
| break; |
| |
| case rs_org: |
| { |
| addressT target = offset; |
| addressT after; |
| |
| if (symbolP) |
| { |
| #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
| know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) |
| || (S_GET_SEGMENT (symbolP) == SEG_DATA) |
| || (S_GET_SEGMENT (symbolP) == SEG_TEXT) |
| || S_GET_SEGMENT (symbolP) == SEG_BSS); |
| know (symbolP->sy_frag); |
| know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) |
| || (symbolP->sy_frag == &zero_address_frag)); |
| #endif |
| /* Convert from an actual address to an octet offset |
| into the section. Here it is assumed that the |
| section's VMA is zero, and can omit subtracting it |
| from the symbol's value to get the address offset. */ |
| know (S_GET_SECTION (symbolP)->vma == 0); |
| target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE; |
| } |
| |
| know (fragP->fr_next); |
| after = fragP->fr_next->fr_address; |
| growth = target - after; |
| if (growth < 0) |
| { |
| /* Growth may be negative, but variable part of frag |
| cannot have fewer than 0 chars. That is, we can't |
| .org backwards. */ |
| as_bad_where (fragP->fr_file, fragP->fr_line, |
| _("attempt to .org backwards")); |
| |
| /* We've issued an error message. Change the |
| frag to avoid cascading errors. */ |
| fragP->fr_type = rs_align; |
| fragP->fr_subtype = 0; |
| fragP->fr_offset = 0; |
| fragP->fr_fix = after - address; |
| growth = stretch; |
| } |
| |
| /* This is an absolute growth factor */ |
| growth -= stretch; |
| break; |
| } |
| |
| case rs_space: |
| growth = 0; |
| if (symbolP) |
| { |
| offsetT amount; |
| |
| amount = S_GET_VALUE (symbolP); |
| if (S_GET_SEGMENT (symbolP) != absolute_section |
| || S_IS_COMMON (symbolP) |
| || ! S_IS_DEFINED (symbolP)) |
| { |
| as_bad_where (fragP->fr_file, fragP->fr_line, |
| _(".space specifies non-absolute value")); |
| /* Prevent repeat of this error message. */ |
| fragP->fr_symbol = 0; |
| } |
| else if (amount < 0) |
| { |
| as_warn_where (fragP->fr_file, fragP->fr_line, |
| _(".space or .fill with negative value, ignored")); |
| fragP->fr_symbol = 0; |
| } |
| else |
| growth = (was_address + fragP->fr_fix + amount |
| - fragP->fr_next->fr_address); |
| } |
| break; |
| |
| case rs_machine_dependent: |
| #ifdef md_relax_frag |
| growth = md_relax_frag (segment, fragP, stretch); |
| #else |
| #ifdef TC_GENERIC_RELAX_TABLE |
| /* The default way to relax a frag is to look through |
| TC_GENERIC_RELAX_TABLE. */ |
| growth = relax_frag (segment, fragP, stretch); |
| #endif /* TC_GENERIC_RELAX_TABLE */ |
| #endif |
| break; |
| |
| case rs_leb128: |
| { |
| valueT value; |
| int size; |
| |
| value = resolve_symbol_value (fragP->fr_symbol); |
| size = sizeof_leb128 (value, fragP->fr_subtype); |
| growth = size - fragP->fr_offset; |
| fragP->fr_offset = size; |
| } |
| break; |
| |
| case rs_cfa: |
| growth = eh_frame_relax_frag (fragP); |
| break; |
| |
| case rs_dwarf2dbg: |
| growth = dwarf2dbg_relax_frag (fragP); |
| break; |
| |
| default: |
| BAD_CASE (fragP->fr_type); |
| break; |
| } |
| if (growth) |
| { |
| stretch += growth; |
| stretched = 1; |
| } |
| } /* For each frag in the segment. */ |
| } |
| while (stretched); /* Until nothing further to relax. */ |
| } /* do_relax */ |
| |
| ret = 0; |
| for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
| if (fragP->last_fr_address != fragP->fr_address) |
| { |
| fragP->last_fr_address = fragP->fr_address; |
| ret = 1; |
| } |
| return ret; |
| } |
| |
| #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) |
| |
| #ifndef TC_RELOC_RTSYM_LOC_FIXUP |
| #define TC_RELOC_RTSYM_LOC_FIXUP(X) (1) |
| #endif |
| |
| /* fixup_segment() |
| |
| Go through all the fixS's in a segment and see which ones can be |
| handled now. (These consist of fixS where we have since discovered |
| the value of a symbol, or the address of the frag involved.) |
| For each one, call md_apply_fix3 to put the fix into the frag data. |
| |
| Result is a count of how many relocation structs will be needed to |
| handle the remaining fixS's that we couldn't completely handle here. |
| These will be output later by emit_relocations(). */ |
| |
| static long |
| fixup_segment (fixP, this_segment_type) |
| register fixS *fixP; |
| segT this_segment_type; /* N_TYPE bits for segment. */ |
| { |
| long seg_reloc_count = 0; |
| symbolS *add_symbolP; |
| symbolS *sub_symbolP; |
| valueT add_number; |
| int size; |
| char *place; |
| long where; |
| int pcrel, plt; |
| fragS *fragP; |
| segT add_symbol_segment = absolute_section; |
| |
| /* If the linker is doing the relaxing, we must not do any fixups. |
| |
| Well, strictly speaking that's not true -- we could do any that are |
| PC-relative and don't cross regions that could change size. And for the |
| i960 (the only machine for which we've got a relaxing linker right now), |
| we might be able to turn callx/callj into bal anyways in cases where we |
| know the maximum displacement. */ |
| if (linkrelax && TC_LINKRELAX_FIXUP (this_segment_type)) |
| { |
| for (; fixP; fixP = fixP->fx_next) |
| seg_reloc_count++; |
| TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); |
| return seg_reloc_count; |
| } |
| |
| for (; fixP; fixP = fixP->fx_next) |
| { |
| #ifdef DEBUG5 |
| fprintf (stderr, "\nprocessing fixup:\n"); |
| print_fixup (fixP); |
| #endif |
| |
| fragP = fixP->fx_frag; |
| know (fragP); |
| where = fixP->fx_where; |
| place = fragP->fr_literal + where; |
| size = fixP->fx_size; |
| add_symbolP = fixP->fx_addsy; |
| #ifdef TC_VALIDATE_FIX |
| TC_VALIDATE_FIX (fixP, this_segment_type, skip); |
| #endif |
| sub_symbolP = fixP->fx_subsy; |
| add_number = fixP->fx_offset; |
| pcrel = fixP->fx_pcrel; |
| plt = fixP->fx_plt; |
| |
| if (add_symbolP != NULL |
| && symbol_mri_common_p (add_symbolP)) |
| { |
| know (add_symbolP->sy_value.X_op == O_symbol); |
| add_number += S_GET_VALUE (add_symbolP); |
| fixP->fx_offset = add_number; |
| add_symbolP = fixP->fx_addsy = |
| symbol_get_value_expression (add_symbolP)->X_add_symbol; |
| } |
| |
| if (add_symbolP) |
| add_symbol_segment = S_GET_SEGMENT (add_symbolP); |
| |
| if (sub_symbolP) |
| { |
| resolve_symbol_value (sub_symbolP); |
| if (add_symbolP == NULL || add_symbol_segment == absolute_section) |
| { |
| if (add_symbolP != NULL) |
| { |
| add_number += S_GET_VALUE (add_symbolP); |
| add_symbolP = NULL; |
| fixP->fx_addsy = NULL; |
| } |
| |
| /* It's just -sym. */ |
| if (S_GET_SEGMENT (sub_symbolP) == absolute_section) |
| { |
| add_number -= S_GET_VALUE (sub_symbolP); |
| fixP->fx_subsy = NULL; |
| } |
| else if (pcrel |
| && S_GET_SEGMENT (sub_symbolP) == this_segment_type) |
| { |
| /* Should try converting to a constant. */ |
| goto bad_sub_reloc; |
| } |
| else |
| bad_sub_reloc: |
| as_bad_where (fixP->fx_file, fixP->fx_line, |
| _("negative of non-absolute symbol `%s'"), |
| S_GET_NAME (sub_symbolP)); |
| } |
| else if (S_GET_SEGMENT (sub_symbolP) == add_symbol_segment |
| && SEG_NORMAL (add_symbol_segment)) |
| { |
| /* Difference of 2 symbols from same segment. |
| Can't make difference of 2 undefineds: 'value' means |
| something different for N_UNDF. */ |
| #ifdef TC_I960 |
| /* Makes no sense to use the difference of 2 arbitrary symbols |
| as the target of a call instruction. */ |
| if (fixP->fx_tcbit) |
| as_bad_where (fixP->fx_file, fixP->fx_line, |
| _("callj to difference of two symbols")); |
| #endif /* TC_I960 */ |
| add_number += (S_GET_VALUE (add_symbolP) |
| - S_GET_VALUE (sub_symbolP)); |
| if (1 |
| #ifdef TC_M68K |
| /* See the comment below about 68k weirdness. */ |
| && 0 |
| #endif |
| && pcrel) |
| add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type); |
| |
| add_symbolP = NULL; |
| pcrel = 0; /* No further pcrel processing. */ |
| |
| /* Let the target machine make the final determination |
| as to whether or not a relocation will be needed to |
| handle this fixup. */ |
| if (!TC_FORCE_RELOCATION_SECTION (fixP, this_segment_type)) |
| { |
| fixP->fx_pcrel = 0; |
| fixP->fx_addsy = NULL; |
| fixP->fx_subsy = NULL; |
| } |
| } |
| else |
| { |
| /* Different segments in subtraction. */ |
| know (!(S_IS_EXTERNAL (sub_symbolP) |
| && (S_GET_SEGMENT (sub_symbolP) == absolute_section))); |
| |
| if ((S_GET_SEGMENT (sub_symbolP) == absolute_section)) |
| add_number -= S_GET_VALUE (sub_symbolP); |
| |
| #ifdef DIFF_EXPR_OK |
| else if (S_GET_SEGMENT (sub_symbolP) == this_segment_type) |
| { |
| /* Make it pc-relative. */ |
| if (0 |
| #ifdef TC_M68K |
| /* Do this for m68k even if it's already described |
| as pc-relative. On the m68k, an operand of |
| "pc@(foo-.-2)" should address "foo" in a |
| pc-relative mode. */ |
| || 1 |
| #endif |
| || !pcrel) |
| { |
| add_number += MD_PCREL_FROM_SECTION (fixP, |
| this_segment_type); |
| pcrel = 1; |
| fixP->fx_pcrel = 1; |
| } |
| |
| add_number -= S_GET_VALUE (sub_symbolP); |
| sub_symbolP = 0; |
| fixP->fx_subsy = 0; |
| } |
| #endif |
| #ifdef UNDEFINED_DIFFERENCE_OK |
| /* The PA needs this for PIC code generation. We basically |
| don't want to do anything if we have the difference of two |
| symbols at this point. */ |
| else if (1) |
| { |
| /* Leave it alone. */ |
| } |
| #endif |
| #ifdef BFD_ASSEMBLER |
| else if (fixP->fx_r_type == BFD_RELOC_GPREL32 |
| || fixP->fx_r_type == BFD_RELOC_GPREL16) |
| { |
| /* Leave it alone. */ |
| } |
| #endif |
| else |
| { |
| char buf[50]; |
| sprint_value (buf, fragP->fr_address + where); |
| as_bad_where (fixP->fx_file, fixP->fx_line, |
| _("subtraction of two symbols in different sections `%s' {%s section} - `%s' {%s section} at file address %s"), |
| S_GET_NAME (add_symbolP), |
| segment_name (S_GET_SEGMENT (add_symbolP)), |
| S_GET_NAME (sub_symbolP), |
| segment_name (S_GET_SEGMENT (sub_symbolP)), |
| buf); |
| } |
| } |
| } |
| |
| if (add_symbolP) |
| { |
| if (add_symbol_segment == this_segment_type && pcrel && !plt |
| && TC_RELOC_RTSYM_LOC_FIXUP (fixP)) |
| { |
| /* This fixup was made when the symbol's segment was |
| SEG_UNKNOWN, but it is now in the local segment. |
| So we know how to do the address without relocation. */ |
| #ifdef TC_I960 |
| /* reloc_callj() may replace a 'call' with a 'calls' or a |
| 'bal', in which cases it modifies *fixP as appropriate. |
| In the case of a 'calls', no further work is required, |
| and *fixP has been set up to make the rest of the code |
| below a no-op. */ |
| reloc_callj (fixP); |
| #endif /* TC_I960 */ |
| |
| add_number += S_GET_VALUE (add_symbolP); |
| add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type); |
| /* Lie. Don't want further pcrel processing. */ |
| pcrel = 0; |
| |
| /* Let the target machine make the final determination |
| as to whether or not a relocation will be needed to |
| handle this fixup. */ |
| if (!TC_FORCE_RELOCATION (fixP)) |
| { |
| fixP->fx_pcrel = 0; |
| fixP->fx_addsy = NULL; |
| } |
| } |
| else |
| { |
| if (add_symbol_segment == absolute_section |
| && ! pcrel) |
| { |
| #ifdef TC_I960 |
| /* See comment about reloc_callj() above. */ |
| reloc_callj (fixP); |
| #endif /* TC_I960 */ |
| add_number += S_GET_VALUE (add_symbolP); |
| |
| /* Let the target machine make the final determination |
| as to whether or not a relocation will be needed to |
| handle this fixup. */ |
| |
| if (!TC_FORCE_RELOCATION (fixP)) |
| { |
| fixP->fx_addsy = NULL; |
| add_symbolP = NULL; |
| } |
| } |
| else if (add_symbol_segment == undefined_section |
| #ifdef BFD_ASSEMBLER |
| || bfd_is_com_section (add_symbol_segment) |
| #endif |
| ) |
| { |
| #ifdef TC_I960 |
| if ((int) fixP->fx_bit_fixP == 13) |
| { |
| /* This is a COBR instruction. They have only a |
| 13-bit displacement and are only to be used |
| for local branches: flag as error, don't generate |
| relocation. */ |
| as_bad_where (fixP->fx_file, fixP->fx_line, |
| _("can't use COBR format with external label")); |
| fixP->fx_addsy = NULL; |
| fixP->fx_done = 1; |
| continue; |
| } /* COBR. */ |
| #endif /* TC_I960 */ |
| |
| #ifdef OBJ_COFF |
| #ifdef TE_I386AIX |
| if (S_IS_COMMON (add_symbolP)) |
| add_number += S_GET_VALUE (add_symbolP); |
| #endif /* TE_I386AIX */ |
| #endif /* OBJ_COFF */ |
| ++seg_reloc_count; |
| } |
| else |
| { |
| seg_reloc_count++; |
| if (TC_FIX_ADJUSTABLE (fixP)) |
| add_number += S_GET_VALUE (add_symbolP); |
| } |
| } |
| } |
| |
| if (pcrel) |
| { |
| add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type); |
| if (add_symbolP == 0) |
| { |
| #ifndef BFD_ASSEMBLER |
| fixP->fx_addsy = &abs_symbol; |
| #else |
| fixP->fx_addsy = section_symbol (absolute_section); |
| #endif |
| symbol_mark_used_in_reloc (fixP->fx_addsy); |
| ++seg_reloc_count; |
| } |
| } |
| |
| if (!fixP->fx_done) |
| md_apply_fix3 (fixP, & add_number, this_segment_type); |
| |
| if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && size > 0) |
| { |
| if ((size_t) size < sizeof (valueT)) |
| { |
| valueT mask; |
| |
| mask = 0; |
| mask--; /* Set all bits to one. */ |
| mask <<= size * 8 - (fixP->fx_signed ? 1 : 0); |
| if ((add_number & mask) != 0 && (add_number & mask) != mask) |
| { |
| char buf[50], buf2[50]; |
| sprint_value (buf, fragP->fr_address + where); |
| if (add_number > 1000) |
| sprint_value (buf2, add_number); |
| else |
| sprintf (buf2, "%ld", (long) add_number); |
| as_bad_where (fixP->fx_file, fixP->fx_line, |
| _("value of %s too large for field of %d bytes at %s"), |
| buf2, size, buf); |
| } /* Generic error checking. */ |
| } |
| #ifdef WARN_SIGNED_OVERFLOW_WORD |
| /* Warn if a .word value is too large when treated as a signed |
| number. We already know it is not too negative. This is to |
| catch over-large switches generated by gcc on the 68k. */ |
| if (!flag_signed_overflow_ok |
| && size == 2 |
| && add_number > 0x7fff) |
| as_bad_where (fixP->fx_file, fixP->fx_line, |
| _("signed .word overflow; switch may be too large; %ld at 0x%lx"), |
| (long) add_number, |
| (unsigned long) (fragP->fr_address + where)); |
| #endif |
| } /* Not a bit fix. */ |
| |
| #ifdef TC_VALIDATE_FIX |
| skip: ATTRIBUTE_UNUSED_LABEL |
| ; |
| #endif |
| #ifdef DEBUG5 |
| fprintf (stderr, "result:\n"); |
| print_fixup (fixP); |
| #endif |
| } /* For each fixS in this segment. */ |
| |
| TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); |
| return seg_reloc_count; |
| } |
| |
| #endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */ |
| |
| void |
| number_to_chars_bigendian (buf, val, n) |
| char *buf; |
| valueT val; |
| int n; |
| { |
| if (n <= 0) |
| abort (); |
| while (n--) |
| { |
| buf[n] = val & 0xff; |
| val >>= 8; |
| } |
| } |
| |
| void |
| number_to_chars_littleendian (buf, val, n) |
| char *buf; |
| valueT val; |
| int n; |
| { |
| if (n <= 0) |
| abort (); |
| while (n--) |
| { |
| *buf++ = val & 0xff; |
| val >>= 8; |
| } |
| } |
| |
| void |
| write_print_statistics (file) |
| FILE *file; |
| { |
| fprintf (file, "fixups: %d\n", n_fixups); |
| } |
| |
| /* For debugging. */ |
| extern int indent_level; |
| |
| void |
| print_fixup (fixp) |
| fixS *fixp; |
| { |
| indent_level = 1; |
| fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line); |
| if (fixp->fx_pcrel) |
| fprintf (stderr, " pcrel"); |
| if (fixp->fx_pcrel_adjust) |
| fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); |
| if (fixp->fx_im_disp) |
| { |
| #ifdef TC_NS32K |
| fprintf (stderr, " im_disp=%d", fixp->fx_im_disp); |
| #else |
| fprintf (stderr, " im_disp"); |
| #endif |
| } |
| if (fixp->fx_tcbit) |
| fprintf (stderr, " tcbit"); |
| if (fixp->fx_done) |
| fprintf (stderr, " done"); |
| fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx", |
| fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where, |
| (long) fixp->fx_offset, (long) fixp->fx_addnumber); |
| #ifdef BFD_ASSEMBLER |
| fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), |
| fixp->fx_r_type); |
| #else |
| #ifdef NEED_FX_R_TYPE |
| fprintf (stderr, " r_type=%d", fixp->fx_r_type); |
| #endif |
| #endif |
| if (fixp->fx_addsy) |
| { |
| fprintf (stderr, "\n +<"); |
| print_symbol_value_1 (stderr, fixp->fx_addsy); |
| fprintf (stderr, ">"); |
| } |
| if (fixp->fx_subsy) |
| { |
| fprintf (stderr, "\n -<"); |
| print_symbol_value_1 (stderr, fixp->fx_subsy); |
| fprintf (stderr, ">"); |
| } |
| fprintf (stderr, "\n"); |
| #ifdef TC_FIX_DATA_PRINT |
| TC_FIX_DATA_PRINT (stderr, fixp); |
| #endif |
| } |