diff options
Diffstat (limited to 'gas/write.c')
| -rw-r--r-- | gas/write.c | 2884 |
1 files changed, 2884 insertions, 0 deletions
diff --git a/gas/write.c b/gas/write.c new file mode 100644 index 0000000000..18e6e103f9 --- /dev/null +++ b/gas/write.c @@ -0,0 +1,2884 @@ +/* write.c - emit .o file + Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 96, 97, 1998 + 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; + 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; /* unused */ + segT section; + PTR xxx; /* 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 (_("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; +{ + 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; + asection *sec; + PTR xxx; +{ + 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 && ! sym->sy_resolved) + resolve_symbol_value (sym, 1); + + if (fixp->fx_subsy != NULL && ! fixp->fx_subsy->sy_resolved) + 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 && sym->sy_value.X_op == O_symbol + && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym))) + { + fixp->fx_offset += sym->sy_value.X_add_number; + sym = sym->sy_value.X_add_symbol; + fixp->fx_addsy = sym; + } + + if (sym != NULL && sym->sy_mri_common) + { + /* 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)) + { + fixp->fx_addsy->sy_used_in_reloc = 1; +#ifdef UNDEFINED_DIFFERENCE_OK + if (fixp->fx_subsy != NULL) + fixp->fx_subsy->sy_used_in_reloc = 1; +#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)) + { + fixp->fx_addsy->sy_used_in_reloc = 1; +#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) + fixp->fx_subsy->sy_used_in_reloc = 1; +#endif + goto done; + } + + /* Don't try to reduce relocs which refer to .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) + { + 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) + { + fixp->fx_addsy->sy_used_in_reloc = 1; +#ifdef UNDEFINED_DIFFERENCE_OK + if (fixp->fx_subsy != NULL) + fixp->fx_subsy->sy_used_in_reloc = 1; +#endif + goto done; + } + } + + /* Since we're reducing to section symbols, don't attempt to reduce + anything that's already using one. */ + if (sym->bsym->flags & BSF_SECTION_SYM) + { + fixp->fx_addsy->sy_used_in_reloc = 1; + 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)) + { + fixp->fx_addsy->sy_used_in_reloc = 1; + 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)) + { + fixp->fx_addsy->sy_used_in_reloc = 1; + 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)) + { + fixp->fx_addsy->sy_used_in_reloc = 1; + 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)); + fixp->fx_addsy->sy_used_in_reloc = 1; + + 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; +{ + 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 (sym->sy_value.X_op == O_symbol + && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym))) + { + symbolS *n; + + /* We must avoid looping, as that can occur with a badly + written program. */ + n = sym->sy_value.X_add_symbol; + if (n == sym) + break; + fixp->fx_offset += sym->sy_value.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 (sym->sy_value.X_op == O_symbol + && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym))) + sym = sym->sy_value.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; + asection *sec; + PTR xxx; +{ + 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] = symp->bsym; + symp->written = 1; + } + } + 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), + NOP_OPCODE, 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 -= lie->sub->sy_frag->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 += lie->add->sy_frag->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)) + if (!symp->sy_resolved) + resolve_symbol_value (symp, 1); + } + + 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 (symp->sy_mri_common) + { + 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. */ + if (! symp->sy_resolved) + { + if (symp->sy_value.X_op == O_constant) + { + /* This is the normal case; skip the call. */ + S_SET_VALUE (symp, + (S_GET_VALUE (symp) + + symp->sy_frag->fr_address)); + symp->sy_resolved = 1; + } + else + resolve_symbol_value (symp, 1); + } + + /* Skip symbols which were equated to undefined or common + symbols. */ + if (symp->sy_value.X_op == O_symbol + && (! 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), + symp->bsym->flags, + segment_name (symp->bsym->section)); +#endif + +#ifdef obj_frob_symbol + obj_frob_symbol (symp, punt); +#endif +#ifdef tc_frob_symbol + if (! punt || symp->sy_used_in_reloc) + 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 + && (symp->bsym->flags & BSF_SECTION_SYM) != 0) + /* 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) + && ! symp->sy_used_in_reloc)) + { + 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 (! symp->sy_resolved) + { + as_bad (_("can't resolve value for symbol \"%s\""), + S_GET_NAME (symp)); + symp->sy_resolved = 1; + } + + /* Set the value into the BFD symbol. Up til now the value + has only been kept in the gas symbolS struct. */ + symp->bsym->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) + + symbolP->sy_frag->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 (symbolP->sy_frag->fr_address >= was_address + && is_dnrange (fragP, symbolP->sy_frag)) + { + 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 = (lie->add->sy_frag->fr_address + + S_GET_VALUE (lie->add) + + lie->addnum + - (lie->sub->sy_frag->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 ((untruth->add->sy_frag == lie->add->sy_frag) + && 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) + + symbolP->sy_frag->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 (_("attempt to .org backwards ignored")); + growth = 0; + } + + growth -= stretch; /* This is an absolute growth factor */ + break; + } + + case rs_space: + if (symbolP) + { + growth = S_GET_VALUE (symbolP); + if (symbolP->sy_frag != &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 + && add_symbolP->sy_mri_common) + { + 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 = add_symbolP->sy_value.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_I386) || !(defined (OBJ_ELF) || defined (OBJ_COFF)) || defined (TE_PE) + add_number += S_GET_VALUE (add_symbolP); +#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 + fixP->fx_addsy->sy_used_in_reloc = 1; + ++seg_reloc_count; + } + } + + if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && size > 0) + { + if ((size_t) size < sizeof (valueT)) + { + valueT mask, hibit; + + /* set all bits to one */ + mask = 0; + mask--; + /* Technically, combining these produces an undefined result + if size is sizeof (valueT), though I think these two + half-way operations should both be defined. And the + compiler should be able to combine them if it's valid on + the host architecture. */ + mask <<= size * 4; + mask <<= size * 4; + hibit = (valueT) 1 << (size * 8 - 1); + if (((add_number & mask) != 0 + || (fixP->fx_signed + && (add_number & hibit) != 0)) + && ((add_number & mask) != mask + || (add_number & hibit) == 0)) + { + 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 */ + + 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 + } +#ifdef TC_VALIDATE_FIX + skip: ; +#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 (stderr, "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 */ |