diff options
Diffstat (limited to 'gas/write.c')
| -rw-r--r-- | gas/write.c | 2875 |
1 files changed, 0 insertions, 2875 deletions
diff --git a/gas/write.c b/gas/write.c deleted file mode 100644 index 536e76d007c..00000000000 --- a/gas/write.c +++ /dev/null @@ -1,2875 +0,0 @@ -/* write.c - emit .o file - Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 96, 97, 98, 1999 - 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" - -/* 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 - -/* The NOP_OPCODE is for the alignment fill value. Fill it with a nop - instruction so that the disassembler does not choke on it. */ -#ifndef NOP_OPCODE -#define NOP_OPCODE 0x00 -#endif - -#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 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 - -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 relax_and_size_seg PARAMS ((bfd *, asection *, PTR)); -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 - -/* - * fix_new() - * - * 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_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 -} - -#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; - 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_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_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_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_and_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); - - flags = bfd_get_section_flags (abfd, sec); - - seginfo = seg_info (sec); - if (seginfo && seginfo->frchainP) - { - relax_segment (seginfo->frchainP->frch_root, sec); - 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; - - 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; - fragp->fr_offset += newsize - size; - } - -#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; - 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; - if (s) - { - fprintf (stream, " %08x: %s(%s", fixp, S_GET_NAME (s), - s->bsym->section->name); - if (s->bsym->flags & BSF_SECTION_SYM) - { - fprintf (stream, " section sym"); - if (S_GET_VALUE (s)) - fprintf (stream, "+%x", S_GET_VALUE (s)); - } - else - fprintf (stream, "+%x", S_GET_VALUE (s)); - fprintf (stream, ")+%x\n", fixp->fx_offset); - } - else - fprintf (stream, " %08x: type %d no sym\n", fixp, fixp->fx_r_type); - 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, 1); - - if (fixp->fx_subsy != NULL) - resolve_symbol_value (fixp->fx_subsy, 1); - - /* If this symbol is equated to an undefined symbol, convert - the fixup to being against that symbol. */ - if (sym != NULL && symbol_equated_p (sym) - && (! S_IS_DEFINED (sym) || S_IS_COMMON (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; - } -#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); - - 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); -/* fixp->fx_addsy->sy_used_in_reloc = 1; */ - } -#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); - 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 use generate the reloc against the latter symbol - rather than the former. */ - sym = fixp->fx_addsy; - while (symbol_equated_p (sym) - && (! S_IS_DEFINED (sym) || S_IS_COMMON (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 use generate the reloc against the latter symbol - rather than the former. */ - sym = fixp->fx_addsy; - while (symbol_equated_p (sym) - && (! S_IS_DEFINED (sym) || S_IS_COMMON (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 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; - } /* for each data frag */ - - 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; - } /* for each bss frag */ - } - - 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 *, size_t)); - - /* 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; - - asympp = (asymbol **) bfd_alloc (stdoutput, - nsyms * sizeof (asymbol *)); - 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 BFD_ASSEMBLER -#define SUB_SEGMENT_ALIGN(SEG) (0) -#else -#define SUB_SEGMENT_ALIGN(SEG) (2) -#endif -#endif - -void -subsegs_finish () -{ - struct frchain *frchainP; - - for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) - { - 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. */ - frag_align (had_errors () ? 0 : SUB_SEGMENT_ALIGN (now_seg), - subseg_text_p (now_seg) ? NOP_OPCODE : 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"), - 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"), - 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, *sec; - int i; - - seclist = &stdoutput->sections; - while (seclist && *seclist) - { - sec = *seclist; - while (sec == reg_section || sec == expr_section) - { - sec = sec->next; - *seclist = sec; - stdoutput->section_count--; - if (!sec) - break; - } - if (*seclist) - 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 - bfd_map_over_sections (stdoutput, relax_and_size_seg, (char *) 0); -#else - relax_and_size_all_segments (); -#endif /* BFD_ASSEMBLER */ - -#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 BFD_ASSEMBLER - to_addr -= symbol_get_frag (lie->sub)->fr_address; -#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; -#ifdef BFD_ASSEMBLER - to_addr += symbol_get_frag (lie->add)->fr_address; -#endif - 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); - } /* for each */ - - } /* for each code frag. */ - - 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); - } /* only if we have a string table */ - -#ifdef BFD_HEADERS - bfd_seek (stdoutput, 0, 0); - bfd_write (the_object_file, 1, 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 - } /* non vms output */ -#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, 1); - } - 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, 1); - - /* Skip symbols which were equated to undefined or common - symbols. */ - if (symbol_equated_p (symp) - && (! S_IS_DEFINED (symp) || S_IS_COMMON (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 */ - -/* - * relax_segment() - * - * 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. - */ - -#ifdef TC_GENERIC_RELAX_TABLE - -static int is_dnrange PARAMS ((fragS *, fragS *)); - -/* Subroutines of relax_segment. */ -static int -is_dnrange (f1, f2) - fragS *f1; - fragS *f2; -{ - for (; f1; f1 = f1->fr_next) - if (f1->fr_next == f2) - return 1; - return 0; -} - -/* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ - -long -relax_frag (fragP, stretch) - fragS *fragP; - long stretch; -{ - const relax_typeS *this_type; - const relax_typeS *start_type; - relax_substateT next_state; - relax_substateT this_state; - long aim, target, growth; - symbolS *symbolP = fragP->fr_symbol; - long offset = fragP->fr_offset; - /* Recompute was_address by undoing "+= stretch" done by relax_segment. */ - unsigned long was_address = fragP->fr_address - stretch; - unsigned long address = fragP->fr_address; - const relax_typeS *table = TC_GENERIC_RELAX_TABLE; - - this_state = fragP->fr_subtype; - start_type = this_type = table + this_state; - target = offset; - - if (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 (symbolP->sy_frag); -#endif - know (!(S_GET_SEGMENT (symbolP) == absolute_section) - || symbolP->sy_frag == &zero_address_frag); - target += S_GET_VALUE (symbolP) + symbol_get_frag (symbolP)->fr_address; - - /* 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. - - Beware zero-length frags. - - There should be a faster way to do this. */ - - if (symbol_get_frag (symbolP)->fr_address >= was_address - && is_dnrange (fragP, symbol_get_frag (symbolP))) - { - 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. */ -/* assert (fragP->fr_targ.ns32k.pcrel_adjust == 0);*/ -#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); -} - -void -relax_segment (segment_frag_root, segment) - struct frag *segment_frag_root; - segT segment; -{ - register struct frag *fragP; - register relax_addressT address; -#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->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: - { - 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 (_("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: - 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; - - default: - BAD_CASE (fragP->fr_type); - break; - } /* switch(fr_type) */ - } /* for each frag in the segment */ - - /* 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. */ - long 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 = stretched = 0; - for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) - { - long growth = 0; - addressT was_address; - offsetT offset; - symbolS *symbolP; - - 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 = (symbol_get_frag (lie->add)->fr_address - + S_GET_VALUE (lie->add) - + lie->addnum - - (symbol_get_frag (lie->sub)->fr_address - + 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 (_(".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: - { - 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: - { - long target = offset; - long 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 - target += (S_GET_VALUE (symbolP) - + symbol_get_frag (symbolP)->fr_address); - } /* if we have a symbol */ - - 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 ignored")); - - /* 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; - } - - growth -= stretch; /* This is an absolute growth factor */ - break; - } - - case rs_space: - if (symbolP) - { - growth = S_GET_VALUE (symbolP); - if (symbol_get_frag (symbolP) != &zero_address_frag - || S_IS_COMMON (symbolP) - || ! S_IS_DEFINED (symbolP)) - as_bad_where (fragP->fr_file, fragP->fr_line, - _(".space specifies non-absolute value")); - fragP->fr_symbol = 0; - if (growth < 0) - { - as_warn (_(".space or .fill with negative value, ignored")); - growth = 0; - } - } - else - growth = 0; - break; - - case rs_machine_dependent: -#ifdef md_relax_frag - growth = md_relax_frag (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 (fragP, stretch); -#endif /* TC_GENERIC_RELAX_TABLE */ -#endif - break; - - case rs_leb128: - { - valueT value; - int size; - - value = resolve_symbol_value (fragP->fr_symbol, 0); - 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; - - default: - BAD_CASE (fragP->fr_type); - break; - } - if (growth) - { - stretch += growth; - stretched++; - } - } /* For each frag in the segment. */ - } - while (stretched); /* Until nothing further to relax. */ - } /* do_relax */ - - /* - * We now have valid fr_address'es for each frag. - */ - - /* - * All fr_address's are correct, relative to their own segment. - * We have made all the fixS we will ever make. - */ -} /* relax_segment() */ - -#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_fix 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) - { - 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, 1); - 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 2 symbols")); -#endif /* TC_I960 */ - add_number += S_GET_VALUE (add_symbolP) - - S_GET_VALUE (sub_symbolP); - - 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 -#if 0 /* Do this even if it's already described as pc-relative. For example, - on the m68k, an operand of "pc@(foo-.-2)" should address "foo" in a - pc-relative mode. */ - && pcrel -#endif - ) - { - /* Make it pc-relative. */ - add_number += (MD_PCREL_FROM_SECTION (fixP, this_segment_type) - - S_GET_VALUE (sub_symbolP)); - pcrel = 1; - fixP->fx_pcrel = 1; - 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); - pcrel = 0; /* Lie. Don't want 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 (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 !(defined (TC_V850) && defined (OBJ_ELF)) -#if !(defined (TC_M68K) && defined (OBJ_ELF)) -#if !(defined (TC_ARM) && defined (OBJ_ELF)) -#if !(defined (TC_I960) && defined (OBJ_ELF)) -#if !defined (TC_I386) || !(defined (OBJ_ELF) || defined (OBJ_COFF)) || defined (TE_PE) - add_number += S_GET_VALUE (add_symbolP); -#endif -#endif -#endif -#endif -#endif - } - } - } - - 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) - { -#ifdef MD_APPLY_FIX3 - md_apply_fix3 (fixP, &add_number, this_segment_type); -#else -#ifdef BFD_ASSEMBLER - md_apply_fix (fixP, &add_number); -#else - md_apply_fix (fixP, add_number); -#endif -#endif - -#ifndef TC_HANDLES_FX_DONE - /* If the tc-* files haven't been converted, assume it's handling - it the old way, where a null fx_addsy means that the fix has - been applied completely, and no further work is needed. */ - if (fixP->fx_addsy == 0 && fixP->fx_pcrel == 0) - fixP->fx_done = 1; -#endif - } - - 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 ((size_t) n > sizeof (val) || 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 ((size_t) n > sizeof (val) || 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 -} - -/* end of write.c */ |