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authorAndrew Hsieh <andrewhsieh@google.com>2014-06-13 12:38:00 -0700
committerAndrew Hsieh <andrewhsieh@google.com>2014-06-13 12:38:00 -0700
commit54f1b3cf509cd889905287cb8ce6c5ae33911a21 (patch)
treee39b1a7fa04db86a8215b7f9d4656d74e394aec0 /binutils-2.25/gas/write.c
parent2a6558a8ecfb81d75215b4ec7dc61113e12cfd5f (diff)
downloadtoolchain_binutils-54f1b3cf509cd889905287cb8ce6c5ae33911a21.tar.gz
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Add upstream binutils-2.25 snapshot 4/4 2014
For MIPS -mmsa support Change-Id: I08c4f002fa7b33dec85ed75956e6ab551bb03c96
Diffstat (limited to 'binutils-2.25/gas/write.c')
-rw-r--r--binutils-2.25/gas/write.c2868
1 files changed, 2868 insertions, 0 deletions
diff --git a/binutils-2.25/gas/write.c b/binutils-2.25/gas/write.c
new file mode 100644
index 00000000..745abe66
--- /dev/null
+++ b/binutils-2.25/gas/write.c
@@ -0,0 +1,2868 @@
+/* write.c - emit .o file
+ Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
+ 2010, 2011, 2012 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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
+
+/* This thing should be set up to do byteordering correctly. But... */
+
+#include "as.h"
+#include "subsegs.h"
+#include "obstack.h"
+#include "output-file.h"
+#include "dwarf2dbg.h"
+#include "libbfd.h"
+#include "compress-debug.h"
+
+#ifndef TC_FORCE_RELOCATION
+#define TC_FORCE_RELOCATION(FIX) \
+ (generic_force_reloc (FIX))
+#endif
+
+#ifndef TC_FORCE_RELOCATION_ABS
+#define TC_FORCE_RELOCATION_ABS(FIX) \
+ (TC_FORCE_RELOCATION (FIX))
+#endif
+
+#ifndef TC_FORCE_RELOCATION_LOCAL
+#define TC_FORCE_RELOCATION_LOCAL(FIX) \
+ (!(FIX)->fx_pcrel \
+ || TC_FORCE_RELOCATION (FIX))
+#endif
+
+#ifndef TC_FORCE_RELOCATION_SUB_SAME
+#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
+ (! SEG_NORMAL (SEG))
+#endif
+
+#ifndef md_register_arithmetic
+# define md_register_arithmetic 1
+#endif
+
+#ifndef TC_FORCE_RELOCATION_SUB_ABS
+#define TC_FORCE_RELOCATION_SUB_ABS(FIX, SEG) \
+ (!md_register_arithmetic && (SEG) == reg_section)
+#endif
+
+#ifndef TC_FORCE_RELOCATION_SUB_LOCAL
+#ifdef DIFF_EXPR_OK
+#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
+ (!md_register_arithmetic && (SEG) == reg_section)
+#else
+#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
+#endif
+#endif
+
+#ifndef TC_VALIDATE_FIX_SUB
+#ifdef UNDEFINED_DIFFERENCE_OK
+/* The PA needs this for PIC code generation. */
+#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
+ (md_register_arithmetic || (SEG) != reg_section)
+#else
+#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
+ ((md_register_arithmetic || (SEG) != reg_section) \
+ && ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \
+ || (FIX)->fx_r_type == BFD_RELOC_GPREL16))
+#endif
+#endif
+
+#ifndef TC_LINKRELAX_FIXUP
+#define TC_LINKRELAX_FIXUP(SEG) 1
+#endif
+
+#ifndef MD_APPLY_SYM_VALUE
+#define MD_APPLY_SYM_VALUE(FIX) 1
+#endif
+
+#ifndef TC_FINALIZE_SYMS_BEFORE_SIZE_SEG
+#define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 1
+#endif
+
+#ifndef MD_PCREL_FROM_SECTION
+#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from (FIX)
+#endif
+
+#ifndef TC_FAKE_LABEL
+#define TC_FAKE_LABEL(NAME) (strcmp ((NAME), FAKE_LABEL_NAME) == 0)
+#endif
+
+/* Positive values of TC_FX_SIZE_SLACK allow a target to define
+ fixups that far past the end of a frag. Having such fixups
+ is of course most most likely a bug in setting fx_size correctly.
+ A negative value disables the fixup check entirely, which is
+ appropriate for something like the Renesas / SuperH SH_COUNT
+ reloc. */
+#ifndef TC_FX_SIZE_SLACK
+#define TC_FX_SIZE_SLACK(FIX) 0
+#endif
+
+/* Used to control final evaluation of expressions. */
+int finalize_syms = 0;
+
+int symbol_table_frozen;
+
+symbolS *abs_section_sym;
+
+/* Remember the value of dot when parsing expressions. */
+addressT dot_value;
+
+/* The frag that dot_value is based from. */
+fragS *dot_frag;
+
+/* Relocs generated by ".reloc" pseudo. */
+struct reloc_list* reloc_list;
+
+void print_fixup (fixS *);
+
+/* 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;
+
+static int n_fixups;
+
+#define RELOC_ENUM enum bfd_reloc_code_real
+
+/* Create a fixS in obstack 'notes'. */
+
+static fixS *
+fix_new_internal (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. */
+ RELOC_ENUM r_type /* Relocation type. */,
+ int at_beginning) /* Add to the start of the list? */
+{
+ fixS *fixP;
+
+ n_fixups++;
+
+ fixP = (fixS *) obstack_alloc (&notes, 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_dot_value = dot_value;
+ fixP->fx_dot_frag = dot_frag;
+ fixP->fx_pcrel = pcrel;
+ fixP->fx_r_type = r_type;
+ 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_tcbit2 = 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);
+
+ {
+
+ 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);
+
+ if (at_beginning)
+ {
+ fixP->fx_next = *seg_fix_rootP;
+ *seg_fix_rootP = fixP;
+ if (fixP->fx_next == NULL)
+ *seg_fix_tailP = fixP;
+ }
+ else
+ {
+ fixP->fx_next = NULL;
+ if (*seg_fix_tailP)
+ (*seg_fix_tailP)->fx_next = fixP;
+ else
+ *seg_fix_rootP = fixP;
+ *seg_fix_tailP = fixP;
+ }
+ }
+
+ return fixP;
+}
+
+/* Create a fixup relative to a symbol (plus a constant). */
+
+fixS *
+fix_new (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. */
+ RELOC_ENUM r_type /* Relocation type. */)
+{
+ return fix_new_internal (frag, where, size, add_symbol,
+ (symbolS *) NULL, offset, pcrel, r_type, FALSE);
+}
+
+/* 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 (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. */
+ RELOC_ENUM r_type /* Relocation type. */)
+{
+ symbolS *add = NULL;
+ symbolS *sub = NULL;
+ offsetT off = 0;
+
+ switch (exp->X_op)
+ {
+ case O_absent:
+ break;
+
+ case O_register:
+ as_bad (_("register value used as expression"));
+ break;
+
+ case O_add:
+ /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if
+ the difference expression cannot immediately be reduced. */
+ {
+ symbolS *stmp = make_expr_symbol (exp);
+
+ exp->X_op = O_symbol;
+ exp->X_op_symbol = 0;
+ exp->X_add_symbol = stmp;
+ exp->X_add_number = 0;
+
+ return fix_new_exp (frag, where, size, exp, pcrel, r_type);
+ }
+
+ case O_symbol_rva:
+ add = exp->X_add_symbol;
+ off = exp->X_add_number;
+ r_type = BFD_RELOC_RVA;
+ 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, FALSE);
+}
+
+/* Create a fixup at the beginning of FRAG. The arguments are the same
+ as for fix_new, except that WHERE is implicitly 0. */
+
+fixS *
+fix_at_start (fragS *frag, int size, symbolS *add_symbol,
+ offsetT offset, int pcrel, RELOC_ENUM r_type)
+{
+ return fix_new_internal (frag, 0, size, add_symbol,
+ (symbolS *) NULL, offset, pcrel, r_type, TRUE);
+}
+
+/* Generic function to determine whether a fixup requires a relocation. */
+int
+generic_force_reloc (fixS *fix)
+{
+ if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT
+ || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
+ return 1;
+
+ if (fix->fx_addsy == NULL)
+ return 0;
+
+ return S_FORCE_RELOC (fix->fx_addsy, fix->fx_subsy == NULL);
+}
+
+/* Append a string onto another string, bumping the pointer along. */
+void
+append (char **charPP, char *fromP, unsigned long length)
+{
+ /* Don't trust memcpy() of 0 chars. */
+ if (length == 0)
+ return;
+
+ memcpy (*charPP, fromP, length);
+ *charPP += length;
+}
+
+/* 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 (/* 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;
+
+ if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg))
+ bfd_set_section_alignment (stdoutput, seg, align);
+}
+
+int
+get_recorded_alignment (segT seg)
+{
+ if (seg == absolute_section)
+ return 0;
+
+ return bfd_get_section_alignment (stdoutput, seg);
+}
+
+/* Reset the section indices after removing the gas created sections. */
+
+static void
+renumber_sections (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *countparg)
+{
+ int *countp = (int *) countparg;
+
+ sec->index = *countp;
+ ++*countp;
+}
+
+static fragS *
+chain_frchains_together_1 (segT section, struct frchain *frchp)
+{
+ fragS dummy, *prev_frag = &dummy;
+ fixS fix_dummy, *prev_fix = &fix_dummy;
+
+ for (; frchp; frchp = frchp->frch_next)
+ {
+ prev_frag->fr_next = frchp->frch_root;
+ prev_frag = frchp->frch_last;
+ gas_assert (prev_frag->fr_type != 0);
+ 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;
+ }
+ }
+ gas_assert (prev_frag != &dummy
+ && prev_frag->fr_type != 0);
+ prev_frag->fr_next = 0;
+ return prev_frag;
+}
+
+static void
+chain_frchains_together (bfd *abfd ATTRIBUTE_UNUSED,
+ segT section,
+ void *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;
+}
+
+static void
+cvt_frag_to_fill (segT sec ATTRIBUTE_UNUSED, fragS *fragP)
+{
+ switch (fragP->fr_type)
+ {
+ case rs_align:
+ case rs_align_code:
+ case rs_align_test:
+ case rs_org:
+ case rs_space:
+#ifdef HANDLE_ALIGN
+ HANDLE_ALIGN (fragP);
+#endif
+ know (fragP->fr_next != NULL);
+ fragP->fr_offset = (fragP->fr_next->fr_address
+ - fragP->fr_address
+ - fragP->fr_fix) / fragP->fr_var;
+ if (fragP->fr_offset < 0)
+ {
+ as_bad_where (fragP->fr_file, fragP->fr_line,
+ _("attempt to .org/.space backwards? (%ld)"),
+ (long) fragP->fr_offset);
+ fragP->fr_offset = 0;
+ }
+ fragP->fr_type = rs_fill;
+ break;
+
+ case rs_fill:
+ break;
+
+ case rs_leb128:
+ {
+ valueT value = S_GET_VALUE (fragP->fr_symbol);
+ int size;
+
+ size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value,
+ fragP->fr_subtype);
+
+ fragP->fr_fix += size;
+ fragP->fr_type = rs_fill;
+ fragP->fr_var = 0;
+ fragP->fr_offset = 0;
+ fragP->fr_symbol = NULL;
+ }
+ break;
+
+ case rs_cfa:
+ eh_frame_convert_frag (fragP);
+ break;
+
+ case rs_dwarf2dbg:
+ dwarf2dbg_convert_frag (fragP);
+ break;
+
+ case rs_machine_dependent:
+ md_convert_frag (stdoutput, sec, fragP);
+
+ gas_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;
+ }
+#ifdef md_frag_check
+ md_frag_check (fragP);
+#endif
+}
+
+struct relax_seg_info
+{
+ int pass;
+ int changed;
+};
+
+static void
+relax_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx)
+{
+ segment_info_type *seginfo = seg_info (sec);
+ struct relax_seg_info *info = (struct relax_seg_info *) xxx;
+
+ if (seginfo && seginfo->frchainP
+ && relax_segment (seginfo->frchainP->frch_root, sec, info->pass))
+ info->changed = 1;
+}
+
+static void
+size_seg (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
+{
+ flagword flags;
+ fragS *fragp;
+ segment_info_type *seginfo;
+ int x;
+ valueT size, newsize;
+
+ subseg_change (sec, 0);
+
+ seginfo = seg_info (sec);
+ if (seginfo && seginfo->frchainP)
+ {
+ for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next)
+ cvt_frag_to_fill (sec, fragp);
+ for (fragp = seginfo->frchainP->frch_root;
+ fragp->fr_next;
+ fragp = fragp->fr_next)
+ /* Walk to last elt. */
+ ;
+ size = fragp->fr_address + fragp->fr_fix;
+ }
+ else
+ size = 0;
+
+ flags = bfd_get_section_flags (abfd, sec);
+ if (size == 0 && bfd_get_section_size (sec) != 0 &&
+ (flags & SEC_HAS_CONTENTS) != 0)
+ return;
+
+ if (size > 0 && ! seginfo->bss)
+ flags |= SEC_HAS_CONTENTS;
+
+ flags &= ~SEC_RELOC;
+ x = bfd_set_section_flags (abfd, sec, flags);
+ gas_assert (x);
+
+ newsize = md_section_align (sec, size);
+ x = bfd_set_section_size (abfd, sec, newsize);
+ gas_assert (x);
+
+ /* If the size had to be rounded up, add some padding in the last
+ non-empty frag. */
+ gas_assert (newsize >= size);
+ if (size != newsize)
+ {
+ fragS *last = seginfo->frchainP->frch_last;
+ fragp = seginfo->frchainP->frch_root;
+ while (fragp->fr_next != last)
+ fragp = fragp->fr_next;
+ last->fr_address = size;
+ if ((newsize - size) % fragp->fr_var == 0)
+ fragp->fr_offset += (newsize - size) / fragp->fr_var;
+ else
+ /* If we hit this abort, it's likely due to subsegs_finish not
+ providing sufficient alignment on the last frag, and the
+ machine dependent code using alignment frags with fr_var
+ greater than 1. */
+ abort ();
+ }
+
+#ifdef tc_frob_section
+ tc_frob_section (sec);
+#endif
+#ifdef obj_frob_section
+ obj_frob_section (sec);
+#endif
+}
+
+#ifdef DEBUG2
+static void
+dump_section_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, FILE *stream)
+{
+ segment_info_type *seginfo = seg_info (sec);
+ fixS *fixp = seginfo->fix_root;
+
+ if (!fixp)
+ return;
+
+ fprintf (stream, "sec %s relocs:\n", sec->name);
+ while (fixp)
+ {
+ symbolS *s = fixp->fx_addsy;
+
+ fprintf (stream, " %08lx: type %d ", (unsigned long) fixp,
+ (int) fixp->fx_r_type);
+ if (s == NULL)
+ fprintf (stream, "no sym\n");
+ else
+ {
+ print_symbol_value_1 (stream, s);
+ fprintf (stream, "\n");
+ }
+ fixp = fixp->fx_next;
+ }
+}
+#else
+#define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0)
+#endif
+
+#ifndef EMIT_SECTION_SYMBOLS
+#define EMIT_SECTION_SYMBOLS 1
+#endif
+
+/* Resolve U.A.OFFSET_SYM and U.A.SYM fields of RELOC_LIST entries,
+ and check for validity. Convert RELOC_LIST from using U.A fields
+ to U.B fields. */
+static void
+resolve_reloc_expr_symbols (void)
+{
+ bfd_vma addr_mask = 1;
+ struct reloc_list *r;
+
+ /* Avoid a shift by the width of type. */
+ addr_mask <<= bfd_arch_bits_per_address (stdoutput) - 1;
+ addr_mask <<= 1;
+ addr_mask -= 1;
+
+ for (r = reloc_list; r; r = r->next)
+ {
+ reloc_howto_type *howto = r->u.a.howto;
+ expressionS *symval;
+ symbolS *sym;
+ bfd_vma offset, addend;
+ asection *sec;
+
+ resolve_symbol_value (r->u.a.offset_sym);
+ symval = symbol_get_value_expression (r->u.a.offset_sym);
+
+ offset = 0;
+ sym = NULL;
+ if (symval->X_op == O_constant)
+ sym = r->u.a.offset_sym;
+ else if (symval->X_op == O_symbol)
+ {
+ sym = symval->X_add_symbol;
+ offset = symval->X_add_number;
+ symval = symbol_get_value_expression (symval->X_add_symbol);
+ }
+ if (sym == NULL
+ || symval->X_op != O_constant
+ || (sec = S_GET_SEGMENT (sym)) == NULL
+ || !SEG_NORMAL (sec))
+ {
+ as_bad_where (r->file, r->line, _("invalid offset expression"));
+ sec = NULL;
+ }
+ else
+ offset += S_GET_VALUE (sym);
+
+ sym = NULL;
+ addend = r->u.a.addend;
+ if (r->u.a.sym != NULL)
+ {
+ resolve_symbol_value (r->u.a.sym);
+ symval = symbol_get_value_expression (r->u.a.sym);
+ if (symval->X_op == O_constant)
+ sym = r->u.a.sym;
+ else if (symval->X_op == O_symbol)
+ {
+ sym = symval->X_add_symbol;
+ addend += symval->X_add_number;
+ symval = symbol_get_value_expression (symval->X_add_symbol);
+ }
+ if (symval->X_op != O_constant)
+ {
+ as_bad_where (r->file, r->line, _("invalid reloc expression"));
+ sec = NULL;
+ }
+ else if (sym != NULL)
+ {
+ /* Convert relocs against local symbols to refer to the
+ corresponding section symbol plus offset instead. Keep
+ PC-relative relocs of the REL variety intact though to
+ prevent the offset from overflowing the relocated field,
+ unless it has enough bits to cover the whole address
+ space. */
+ if (S_IS_LOCAL (sym) && !symbol_section_p (sym)
+ && (sec->use_rela_p
+ || (howto->partial_inplace
+ && (!howto->pc_relative
+ || howto->src_mask == addr_mask))))
+ {
+ asection *symsec = S_GET_SEGMENT (sym);
+ if (!(((symsec->flags & SEC_MERGE) != 0
+ && addend != 0)
+ || (symsec->flags & SEC_THREAD_LOCAL) != 0))
+ {
+ addend += S_GET_VALUE (sym);
+ sym = section_symbol (symsec);
+ }
+ }
+ symbol_mark_used_in_reloc (sym);
+ }
+ }
+ if (sym == NULL)
+ {
+ if (abs_section_sym == NULL)
+ abs_section_sym = section_symbol (absolute_section);
+ sym = abs_section_sym;
+ }
+
+ r->u.b.sec = sec;
+ r->u.b.s = symbol_get_bfdsym (sym);
+ r->u.b.r.sym_ptr_ptr = &r->u.b.s;
+ r->u.b.r.address = offset;
+ r->u.b.r.addend = addend;
+ r->u.b.r.howto = howto;
+ }
+}
+
+/* This pass over fixups decides whether symbols can be replaced with
+ section symbols. */
+
+static void
+adjust_reloc_syms (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *sec,
+ void *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. */
+ resolve_symbol_value (sym);
+
+ if (fixp->fx_subsy != NULL)
+ resolve_symbol_value (fixp->fx_subsy);
+
+ /* If this symbol is equated to an undefined or common symbol,
+ convert the fixup to being against that symbol. */
+ while (symbol_equated_reloc_p (sym)
+ || S_IS_WEAKREFR (sym))
+ {
+ symbolS *newsym = symbol_get_value_expression (sym)->X_add_symbol;
+ if (sym == newsym)
+ break;
+ fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
+ fixp->fx_addsy = newsym;
+ sym = newsym;
+ }
+
+ if (symbol_mri_common_p (sym))
+ {
+ fixp->fx_offset += S_GET_VALUE (sym);
+ fixp->fx_addsy = symbol_get_value_expression (sym)->X_add_symbol;
+ continue;
+ }
+
+ /* If the symbol is undefined, common, weak, or global (ELF
+ shared libs), we can't replace it with the section symbol. */
+ if (S_FORCE_RELOC (fixp->fx_addsy, 1))
+ continue;
+
+ /* 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))
+ continue;
+#endif
+
+ /* Since we're reducing to section symbols, don't attempt to reduce
+ anything that's already using one. */
+ if (symbol_section_p (sym))
+ continue;
+
+ symsec = S_GET_SEGMENT (sym);
+ if (symsec == NULL)
+ abort ();
+
+ if (bfd_is_abs_section (symsec))
+ {
+ /* The fixup_segment routine normally will not use this
+ symbol in a relocation. */
+ continue;
+ }
+
+ /* 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))
+ {
+ if ((symsec->flags & SEC_LINK_ONCE) != 0
+ || (IS_ELF
+ /* The GNU toolchain uses an extension for ELF: a
+ section beginning with the magic string
+ .gnu.linkonce is a linkonce section. */
+ && strncmp (segment_name (symsec), ".gnu.linkonce",
+ sizeof ".gnu.linkonce" - 1) == 0))
+ continue;
+ }
+
+ /* Never adjust a reloc against local symbol in a merge section
+ with non-zero addend. */
+ if ((symsec->flags & SEC_MERGE) != 0
+ && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL))
+ continue;
+
+ /* Never adjust a reloc against TLS local symbol. */
+ if ((symsec->flags & SEC_THREAD_LOCAL) != 0)
+ continue;
+
+ /* 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));
+#ifdef DEBUG5
+ fprintf (stderr, "\nadjusted fixup:\n");
+ print_fixup (fixp);
+#endif
+ }
+
+ dump_section_relocs (abfd, sec, stderr);
+}
+
+/* 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.
+ Ones that we couldn't completely handle here will be output later
+ by emit_relocations. */
+
+static void
+fixup_segment (fixS *fixP, segT this_segment)
+{
+ valueT add_number;
+ fragS *fragP;
+ segT add_symbol_segment = absolute_section;
+
+ if (fixP != NULL && abs_section_sym == NULL)
+ abs_section_sym = section_symbol (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 we might be able to turn callx/callj into bal
+ anyways in cases where we know the maximum displacement. */
+ if (linkrelax && TC_LINKRELAX_FIXUP (this_segment))
+ {
+ for (; fixP; fixP = fixP->fx_next)
+ if (!fixP->fx_done)
+ {
+ if (fixP->fx_addsy == NULL)
+ {
+ /* There was no symbol required by this relocation.
+ However, BFD doesn't really handle relocations
+ without symbols well. So fake up a local symbol in
+ the absolute section. */
+ fixP->fx_addsy = abs_section_sym;
+ }
+ symbol_mark_used_in_reloc (fixP->fx_addsy);
+ if (fixP->fx_subsy != NULL)
+ symbol_mark_used_in_reloc (fixP->fx_subsy);
+ }
+ return;
+ }
+
+ for (; fixP; fixP = fixP->fx_next)
+ {
+#ifdef DEBUG5
+ fprintf (stderr, "\nprocessing fixup:\n");
+ print_fixup (fixP);
+#endif
+
+ fragP = fixP->fx_frag;
+ know (fragP);
+#ifdef TC_VALIDATE_FIX
+ TC_VALIDATE_FIX (fixP, this_segment, skip);
+#endif
+ add_number = fixP->fx_offset;
+
+ if (fixP->fx_addsy != NULL)
+ add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy);
+
+ if (fixP->fx_subsy != NULL)
+ {
+ segT sub_symbol_segment;
+ resolve_symbol_value (fixP->fx_subsy);
+ sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy);
+ if (fixP->fx_addsy != NULL
+ && sub_symbol_segment == add_symbol_segment
+ && !S_FORCE_RELOC (fixP->fx_addsy, 0)
+ && !S_FORCE_RELOC (fixP->fx_subsy, 0)
+ && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment))
+ {
+ add_number += S_GET_VALUE (fixP->fx_addsy);
+ add_number -= S_GET_VALUE (fixP->fx_subsy);
+ fixP->fx_offset = add_number;
+ fixP->fx_addsy = NULL;
+ fixP->fx_subsy = NULL;
+#ifdef TC_M68K
+ /* See the comment below about 68k weirdness. */
+ fixP->fx_pcrel = 0;
+#endif
+ }
+ else if (sub_symbol_segment == absolute_section
+ && !S_FORCE_RELOC (fixP->fx_subsy, 0)
+ && !TC_FORCE_RELOCATION_SUB_ABS (fixP, add_symbol_segment))
+ {
+ add_number -= S_GET_VALUE (fixP->fx_subsy);
+ fixP->fx_offset = add_number;
+ fixP->fx_subsy = NULL;
+ }
+ else if (sub_symbol_segment == this_segment
+ && !S_FORCE_RELOC (fixP->fx_subsy, 0)
+ && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP, add_symbol_segment))
+ {
+ add_number -= S_GET_VALUE (fixP->fx_subsy);
+ fixP->fx_offset = (add_number + fixP->fx_dot_value
+ + fixP->fx_dot_frag->fr_address);
+
+ /* Make it pc-relative. If the back-end code has not
+ selected a pc-relative reloc, cancel the adjustment
+ we do later on all pc-relative relocs. */
+ if (0
+#ifdef TC_M68K
+ /* Do this for m68k even if it's already described
+ as pc-relative. On the m68k, an operand of
+ "pc@(foo-.-2)" should address "foo" in a
+ pc-relative mode. */
+ || 1
+#endif
+ || !fixP->fx_pcrel)
+ add_number += MD_PCREL_FROM_SECTION (fixP, this_segment);
+ fixP->fx_subsy = NULL;
+ fixP->fx_pcrel = 1;
+ }
+ else if (!TC_VALIDATE_FIX_SUB (fixP, add_symbol_segment))
+ {
+ if (!md_register_arithmetic
+ && (add_symbol_segment == reg_section
+ || sub_symbol_segment == reg_section))
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("register value used as expression"));
+ else
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("can't resolve `%s' {%s section} - `%s' {%s section}"),
+ fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0",
+ segment_name (add_symbol_segment),
+ S_GET_NAME (fixP->fx_subsy),
+ segment_name (sub_symbol_segment));
+ }
+ else if (sub_symbol_segment != undefined_section
+ && ! bfd_is_com_section (sub_symbol_segment)
+ && MD_APPLY_SYM_VALUE (fixP))
+ add_number -= S_GET_VALUE (fixP->fx_subsy);
+ }
+
+ if (fixP->fx_addsy)
+ {
+ if (add_symbol_segment == this_segment
+ && !S_FORCE_RELOC (fixP->fx_addsy, 0)
+ && !TC_FORCE_RELOCATION_LOCAL (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. */
+ add_number += S_GET_VALUE (fixP->fx_addsy);
+ fixP->fx_offset = add_number;
+ if (fixP->fx_pcrel)
+ add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
+ fixP->fx_addsy = NULL;
+ fixP->fx_pcrel = 0;
+ }
+ else if (add_symbol_segment == absolute_section
+ && !S_FORCE_RELOC (fixP->fx_addsy, 0)
+ && !TC_FORCE_RELOCATION_ABS (fixP))
+ {
+ add_number += S_GET_VALUE (fixP->fx_addsy);
+ fixP->fx_offset = add_number;
+ fixP->fx_addsy = NULL;
+ }
+ else if (add_symbol_segment != undefined_section
+ && ! bfd_is_com_section (add_symbol_segment)
+ && MD_APPLY_SYM_VALUE (fixP))
+ add_number += S_GET_VALUE (fixP->fx_addsy);
+ }
+
+ if (fixP->fx_pcrel)
+ {
+ add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
+ if (!fixP->fx_done && fixP->fx_addsy == NULL)
+ {
+ /* There was no symbol required by this relocation.
+ However, BFD doesn't really handle relocations
+ without symbols well. So fake up a local symbol in
+ the absolute section. */
+ fixP->fx_addsy = abs_section_sym;
+ }
+ }
+
+ if (!fixP->fx_done)
+ md_apply_fix (fixP, &add_number, this_segment);
+
+ if (!fixP->fx_done)
+ {
+ if (fixP->fx_addsy == NULL)
+ fixP->fx_addsy = abs_section_sym;
+ symbol_mark_used_in_reloc (fixP->fx_addsy);
+ if (fixP->fx_subsy != NULL)
+ symbol_mark_used_in_reloc (fixP->fx_subsy);
+ }
+
+ if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && fixP->fx_size != 0)
+ {
+ if (fixP->fx_size < sizeof (valueT))
+ {
+ valueT mask;
+
+ mask = 0;
+ mask--; /* Set all bits to one. */
+ mask <<= fixP->fx_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 + fixP->fx_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, fixP->fx_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
+ && fixP->fx_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,
+ (long) (fragP->fr_address + fixP->fx_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. */
+}
+
+static void
+fix_segment (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *sec,
+ void *xxx ATTRIBUTE_UNUSED)
+{
+ segment_info_type *seginfo = seg_info (sec);
+
+ fixup_segment (seginfo->fix_root, sec);
+}
+
+static void
+install_reloc (asection *sec, arelent *reloc, fragS *fragp,
+ char *file, unsigned int line)
+{
+ char *err;
+ bfd_reloc_status_type s;
+ asymbol *sym;
+
+ if (reloc->sym_ptr_ptr != NULL
+ && (sym = *reloc->sym_ptr_ptr) != NULL
+ && (sym->flags & BSF_KEEP) == 0
+ && ((sym->flags & BSF_SECTION_SYM) == 0
+ || (EMIT_SECTION_SYMBOLS
+ && !bfd_is_abs_section (sym->section))))
+ as_bad_where (file, line, _("redefined symbol cannot be used on reloc"));
+
+ s = bfd_install_relocation (stdoutput, reloc,
+ fragp->fr_literal, fragp->fr_address,
+ sec, &err);
+ switch (s)
+ {
+ case bfd_reloc_ok:
+ break;
+ case bfd_reloc_overflow:
+ as_bad_where (file, line, _("relocation overflow"));
+ break;
+ case bfd_reloc_outofrange:
+ as_bad_where (file, line, _("relocation out of range"));
+ break;
+ default:
+ as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"),
+ file, line, s);
+ }
+}
+
+static fragS *
+get_frag_for_reloc (fragS *last_frag,
+ const segment_info_type *seginfo,
+ const struct reloc_list *r)
+{
+ fragS *f;
+
+ for (f = last_frag; f != NULL; f = f->fr_next)
+ if (f->fr_address <= r->u.b.r.address
+ && r->u.b.r.address < f->fr_address + f->fr_fix)
+ return f;
+
+ for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next)
+ if (f->fr_address <= r->u.b.r.address
+ && r->u.b.r.address < f->fr_address + f->fr_fix)
+ return f;
+
+ as_bad_where (r->file, r->line,
+ _("reloc not within (fixed part of) section"));
+ return NULL;
+}
+
+static void
+write_relocs (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
+{
+ segment_info_type *seginfo = seg_info (sec);
+ unsigned int n;
+ struct reloc_list *my_reloc_list, **rp, *r;
+ arelent **relocs;
+ fixS *fixp;
+ fragS *last_frag;
+
+ /* If seginfo is NULL, we did not create this section; don't do
+ anything with it. */
+ if (seginfo == NULL)
+ return;
+
+ n = 0;
+ for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
+ if (!fixp->fx_done)
+ n++;
+
+#ifdef RELOC_EXPANSION_POSSIBLE
+ n *= MAX_RELOC_EXPANSION;
+#endif
+
+ /* Extract relocs for this section from reloc_list. */
+ rp = &reloc_list;
+ my_reloc_list = NULL;
+ while ((r = *rp) != NULL)
+ {
+ if (r->u.b.sec == sec)
+ {
+ *rp = r->next;
+ r->next = my_reloc_list;
+ my_reloc_list = r;
+ n++;
+ }
+ else
+ rp = &r->next;
+ }
+
+ relocs = (arelent **) xcalloc (n, sizeof (arelent *));
+
+ n = 0;
+ r = my_reloc_list;
+ last_frag = NULL;
+ for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
+ {
+ int fx_size, slack;
+ offsetT loc;
+ arelent **reloc;
+#ifndef RELOC_EXPANSION_POSSIBLE
+ arelent *rel;
+
+ reloc = &rel;
+#endif
+
+ if (fixp->fx_done)
+ continue;
+
+ fx_size = fixp->fx_size;
+ slack = TC_FX_SIZE_SLACK (fixp);
+ if (slack > 0)
+ fx_size = fx_size > slack ? fx_size - slack : 0;
+ loc = fixp->fx_where + fx_size;
+ if (slack >= 0 && loc > fixp->fx_frag->fr_fix)
+ as_bad_where (fixp->fx_file, fixp->fx_line,
+ _("internal error: fixup not contained within frag"));
+
+#ifndef RELOC_EXPANSION_POSSIBLE
+ *reloc = tc_gen_reloc (sec, fixp);
+#else
+ reloc = tc_gen_reloc (sec, fixp);
+#endif
+
+ while (*reloc)
+ {
+ while (r != NULL && r->u.b.r.address < (*reloc)->address)
+ {
+ fragS *f = get_frag_for_reloc (last_frag, seginfo, r);
+ if (f != NULL)
+ {
+ last_frag = f;
+ relocs[n++] = &r->u.b.r;
+ install_reloc (sec, &r->u.b.r, f, r->file, r->line);
+ }
+ r = r->next;
+ }
+ relocs[n++] = *reloc;
+ install_reloc (sec, *reloc, fixp->fx_frag,
+ fixp->fx_file, fixp->fx_line);
+#ifndef RELOC_EXPANSION_POSSIBLE
+ break;
+#else
+ reloc++;
+#endif
+ }
+ }
+
+ while (r != NULL)
+ {
+ fragS *f = get_frag_for_reloc (last_frag, seginfo, r);
+ if (f != NULL)
+ {
+ last_frag = f;
+ relocs[n++] = &r->u.b.r;
+ install_reloc (sec, &r->u.b.r, f, r->file, r->line);
+ }
+ r = r->next;
+ }
+
+#ifdef DEBUG4
+ {
+ unsigned int k, j, nsyms;
+ asymbol **sympp;
+ sympp = bfd_get_outsymbols (stdoutput);
+ nsyms = bfd_get_symcount (stdoutput);
+ for (k = 0; k < n; k++)
+ if (((*relocs[k]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0)
+ {
+ for (j = 0; j < nsyms; j++)
+ if (sympp[j] == *relocs[k]->sym_ptr_ptr)
+ break;
+ if (j == nsyms)
+ abort ();
+ }
+ }
+#endif
+
+ if (n)
+ {
+ flagword flags = bfd_get_section_flags (abfd, sec);
+ flags |= SEC_RELOC;
+ bfd_set_section_flags (abfd, sec, flags);
+ bfd_set_reloc (stdoutput, sec, relocs, n);
+ }
+
+#ifdef SET_SECTION_RELOCS
+ SET_SECTION_RELOCS (sec, relocs, n);
+#endif
+
+#ifdef DEBUG3
+ {
+ unsigned int k;
+
+ fprintf (stderr, "relocs for sec %s\n", sec->name);
+ for (k = 0; k < n; k++)
+ {
+ arelent *rel = relocs[k];
+ asymbol *s = *rel->sym_ptr_ptr;
+ fprintf (stderr, " reloc %2d @%p off %4lx : sym %-10s addend %lx\n",
+ k, rel, (unsigned long)rel->address, s->name,
+ (unsigned long)rel->addend);
+ }
+ }
+#endif
+}
+
+static int
+compress_frag (struct z_stream_s *strm, const char *contents, int in_size,
+ fragS **last_newf, struct obstack *ob)
+{
+ int out_size;
+ int total_out_size = 0;
+ fragS *f = *last_newf;
+ char *next_out;
+ int avail_out;
+
+ /* Call the compression routine repeatedly until it has finished
+ processing the frag. */
+ while (in_size > 0)
+ {
+ /* Reserve all the space available in the current chunk.
+ If none is available, start a new frag. */
+ avail_out = obstack_room (ob);
+ if (avail_out <= 0)
+ {
+ obstack_finish (ob);
+ f = frag_alloc (ob);
+ f->fr_type = rs_fill;
+ (*last_newf)->fr_next = f;
+ *last_newf = f;
+ avail_out = obstack_room (ob);
+ }
+ if (avail_out <= 0)
+ as_fatal (_("can't extend frag"));
+ next_out = obstack_next_free (ob);
+ obstack_blank_fast (ob, avail_out);
+ out_size = compress_data (strm, &contents, &in_size,
+ &next_out, &avail_out);
+ if (out_size < 0)
+ return -1;
+
+ f->fr_fix += out_size;
+ total_out_size += out_size;
+
+ /* Return unused space. */
+ if (avail_out > 0)
+ obstack_blank_fast (ob, -avail_out);
+ }
+
+ return total_out_size;
+}
+
+static void
+compress_debug (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
+{
+ segment_info_type *seginfo = seg_info (sec);
+ fragS *f;
+ fragS *first_newf;
+ fragS *last_newf;
+ struct obstack *ob = &seginfo->frchainP->frch_obstack;
+ bfd_size_type uncompressed_size = (bfd_size_type) sec->size;
+ bfd_size_type compressed_size;
+ const char *section_name;
+ char *compressed_name;
+ char *header;
+ struct z_stream_s *strm;
+ int x;
+ flagword flags = bfd_get_section_flags (abfd, sec);
+
+ if (seginfo == NULL
+ || sec->size < 32
+ || (flags & (SEC_ALLOC | SEC_HAS_CONTENTS)) == SEC_ALLOC)
+ return;
+
+ section_name = bfd_get_section_name (stdoutput, sec);
+ if (strncmp (section_name, ".debug_", 7) != 0)
+ return;
+
+ strm = compress_init ();
+ if (strm == NULL)
+ return;
+
+ /* Create a new frag to contain the "ZLIB" header. */
+ first_newf = frag_alloc (ob);
+ if (obstack_room (ob) < 12)
+ first_newf = frag_alloc (ob);
+ if (obstack_room (ob) < 12)
+ as_fatal (_("can't extend frag %u chars"), 12);
+ last_newf = first_newf;
+ obstack_blank_fast (ob, 12);
+ last_newf->fr_type = rs_fill;
+ last_newf->fr_fix = 12;
+ header = last_newf->fr_literal;
+ memcpy (header, "ZLIB", 4);
+ header[11] = uncompressed_size; uncompressed_size >>= 8;
+ header[10] = uncompressed_size; uncompressed_size >>= 8;
+ header[9] = uncompressed_size; uncompressed_size >>= 8;
+ header[8] = uncompressed_size; uncompressed_size >>= 8;
+ header[7] = uncompressed_size; uncompressed_size >>= 8;
+ header[6] = uncompressed_size; uncompressed_size >>= 8;
+ header[5] = uncompressed_size; uncompressed_size >>= 8;
+ header[4] = uncompressed_size;
+ compressed_size = 12;
+
+ /* Stream the frags through the compression engine, adding new frags
+ as necessary to accomodate the compressed output. */
+ for (f = seginfo->frchainP->frch_root;
+ f;
+ f = f->fr_next)
+ {
+ offsetT fill_size;
+ char *fill_literal;
+ offsetT count;
+ int out_size;
+
+ gas_assert (f->fr_type == rs_fill);
+ if (f->fr_fix)
+ {
+ out_size = compress_frag (strm, f->fr_literal, f->fr_fix,
+ &last_newf, ob);
+ if (out_size < 0)
+ return;
+ compressed_size += out_size;
+ }
+ fill_literal = f->fr_literal + f->fr_fix;
+ fill_size = f->fr_var;
+ count = f->fr_offset;
+ gas_assert (count >= 0);
+ if (fill_size && count)
+ {
+ while (count--)
+ {
+ out_size = compress_frag (strm, fill_literal, (int) fill_size,
+ &last_newf, ob);
+ if (out_size < 0)
+ return;
+ compressed_size += out_size;
+ }
+ }
+ }
+
+ /* Flush the compression state. */
+ for (;;)
+ {
+ int avail_out;
+ char *next_out;
+ int out_size;
+
+ /* Reserve all the space available in the current chunk.
+ If none is available, start a new frag. */
+ avail_out = obstack_room (ob);
+ if (avail_out <= 0)
+ {
+ fragS *newf;
+
+ obstack_finish (ob);
+ newf = frag_alloc (ob);
+ newf->fr_type = rs_fill;
+ last_newf->fr_next = newf;
+ last_newf = newf;
+ avail_out = obstack_room (ob);
+ }
+ if (avail_out <= 0)
+ as_fatal (_("can't extend frag"));
+ next_out = obstack_next_free (ob);
+ obstack_blank_fast (ob, avail_out);
+ x = compress_finish (strm, &next_out, &avail_out, &out_size);
+ if (x < 0)
+ return;
+
+ last_newf->fr_fix += out_size;
+ compressed_size += out_size;
+
+ /* Return unused space. */
+ if (avail_out > 0)
+ obstack_blank_fast (ob, -avail_out);
+
+ if (x == 0)
+ break;
+ }
+
+ /* Replace the uncompressed frag list with the compressed frag list. */
+ seginfo->frchainP->frch_root = first_newf;
+ seginfo->frchainP->frch_last = last_newf;
+
+ /* Update the section size and its name. */
+ x = bfd_set_section_size (abfd, sec, compressed_size);
+ gas_assert (x);
+ compressed_name = (char *) xmalloc (strlen (section_name) + 2);
+ compressed_name[0] = '.';
+ compressed_name[1] = 'z';
+ strcpy (compressed_name + 2, section_name + 1);
+ bfd_section_name (stdoutput, sec) = compressed_name;
+}
+
+static void
+write_contents (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *sec,
+ void *xxx ATTRIBUTE_UNUSED)
+{
+ segment_info_type *seginfo = seg_info (sec);
+ addressT 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;
+ addressT fill_size;
+ char *fill_literal;
+ offsetT count;
+
+ gas_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)
+ as_fatal (_("can't write %s: %s"), stdoutput->filename,
+ bfd_errmsg (bfd_get_error ()));
+ offset += f->fr_fix;
+ }
+ fill_literal = f->fr_literal + f->fr_fix;
+ fill_size = f->fr_var;
+ count = f->fr_offset;
+ gas_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)
+ as_fatal (_("can't write %s: %s"), stdoutput->filename,
+ bfd_errmsg (bfd_get_error ()));
+ 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)
+ as_fatal (_("cannot write to output file '%s': %s"),
+ stdoutput->filename,
+ bfd_errmsg (bfd_get_error ()));
+ offset += n_per_buf * fill_size;
+ }
+ }
+ }
+ }
+}
+
+static void
+merge_data_into_text (void)
+{
+ 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;
+}
+
+static void
+set_symtab (void)
+{
+ int nsyms;
+ asymbol **asympp;
+ symbolS *symp;
+ bfd_boolean result;
+
+ /* Count symbols. We can't rely on a count made by the loop in
+ write_object_file, because *_frob_file may add a new symbol or
+ two. */
+ nsyms = 0;
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ nsyms++;
+
+ if (nsyms)
+ {
+ int i;
+ bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *);
+
+ asympp = (asymbol **) bfd_alloc (stdoutput, amt);
+ symp = symbol_rootP;
+ for (i = 0; i < nsyms; i++, symp = symbol_next (symp))
+ {
+ asympp[i] = symbol_get_bfdsym (symp);
+ if (asympp[i]->flags != BSF_SECTION_SYM
+ || !(bfd_is_const_section (asympp[i]->section)
+ && asympp[i]->section->symbol == asympp[i]))
+ asympp[i]->flags |= BSF_KEEP;
+ symbol_mark_written (symp);
+ }
+ }
+ else
+ asympp = 0;
+ result = bfd_set_symtab (stdoutput, asympp, nsyms);
+ gas_assert (result);
+ symbol_table_frozen = 1;
+}
+
+/* Finish the subsegments. After every sub-segment, we fake an
+ ".align ...". This conforms to BSD4.2 brane-damage. We then fake
+ ".fill 0" because that is the kind of frag that requires least
+ thought. ".align" frags like to have a following frag since that
+ makes calculating their intended length trivial. */
+
+#ifndef SUB_SEGMENT_ALIGN
+#ifdef HANDLE_ALIGN
+/* The last subsegment gets an alignment corresponding to the alignment
+ of the section. This allows proper nop-filling at the end of
+ code-bearing sections. */
+#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
+ (!(FRCHAIN)->frch_next ? get_recorded_alignment (SEG) : 0)
+#else
+#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
+#endif
+#endif
+
+void
+subsegs_finish (void)
+{
+ struct frchain *frchainP;
+ asection *s;
+
+ for (s = stdoutput->sections; s; s = s->next)
+ {
+ segment_info_type *seginfo = seg_info (s);
+ if (!seginfo)
+ continue;
+
+ for (frchainP = seginfo->frchainP;
+ frchainP != NULL;
+ frchainP = frchainP->frch_next)
+ {
+ int alignment = 0;
+
+ subseg_set (s, frchainP->frch_subseg);
+
+ /* This now gets called even if we had errors. In that case,
+ any alignment is meaningless, and, moreover, will look weird
+ if we are generating a listing. */
+ if (!had_errors ())
+ {
+ alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP);
+ if ((bfd_get_section_flags (now_seg->owner, now_seg) & SEC_MERGE)
+ && now_seg->entsize)
+ {
+ unsigned int entsize = now_seg->entsize;
+ int entalign = 0;
+
+ while ((entsize & 1) == 0)
+ {
+ ++entalign;
+ entsize >>= 1;
+ }
+ if (entalign > alignment)
+ alignment = entalign;
+ }
+ }
+
+ if (subseg_text_p (now_seg))
+ frag_align_code (alignment, 0);
+ else
+ frag_align (alignment, 0, 0);
+
+ /* frag_align will have left a new frag.
+ Use this last frag for an empty ".fill".
+
+ For this segment ...
+ Create a last frag. Do not leave a "being filled in frag". */
+ frag_wane (frag_now);
+ frag_now->fr_fix = 0;
+ know (frag_now->fr_next == NULL);
+ }
+ }
+}
+
+/* Write the object file. */
+
+void
+write_object_file (void)
+{
+ struct relax_seg_info rsi;
+#ifndef WORKING_DOT_WORD
+ fragS *fragP; /* Track along all frags. */
+#endif
+
+#ifdef md_pre_output_hook
+ md_pre_output_hook;
+#endif
+
+ /* Do we really want to write it? */
+ {
+ int n_warns, n_errs;
+ n_warns = had_warnings ();
+ n_errs = had_errors ();
+ /* The -Z flag indicates that an object file should be generated,
+ regardless of warnings and errors. */
+ if (flag_always_generate_output)
+ {
+ if (n_warns || n_errs)
+ as_warn (_("%d error%s, %d warning%s, generating bad object file"),
+ n_errs, n_errs == 1 ? "" : "s",
+ n_warns, n_warns == 1 ? "" : "s");
+ }
+ else
+ {
+ if (n_errs)
+ as_fatal (_("%d error%s, %d warning%s, no object file generated"),
+ n_errs, n_errs == 1 ? "" : "s",
+ n_warns, n_warns == 1 ? "" : "s");
+ }
+ }
+
+#ifdef md_pre_relax_hook
+ md_pre_relax_hook;
+#endif
+
+ /* From now on, we don't care about sub-segments. Build one frag chain
+ for each segment. Linked thru fr_next. */
+
+ /* Remove the sections created by gas for its own purposes. */
+ {
+ int i;
+
+ bfd_section_list_remove (stdoutput, reg_section);
+ bfd_section_list_remove (stdoutput, expr_section);
+ stdoutput->section_count -= 2;
+ i = 0;
+ bfd_map_over_sections (stdoutput, renumber_sections, &i);
+ }
+
+ bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0);
+
+ /* 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 (flag_readonly_data_in_text)
+ {
+ merge_data_into_text ();
+ }
+
+ rsi.pass = 0;
+ while (1)
+ {
+#ifndef WORKING_DOT_WORD
+ /* We need to reset the markers in the broken word list and
+ associated frags between calls to relax_segment (via
+ relax_seg). Since the broken word list is global, we do it
+ once per round, rather than locally in relax_segment for each
+ segment. */
+ struct broken_word *brokp;
+
+ for (brokp = broken_words;
+ brokp != (struct broken_word *) NULL;
+ brokp = brokp->next_broken_word)
+ {
+ brokp->added = 0;
+
+ if (brokp->dispfrag != (fragS *) NULL
+ && brokp->dispfrag->fr_type == rs_broken_word)
+ brokp->dispfrag->fr_subtype = 0;
+ }
+#endif
+
+ rsi.changed = 0;
+ bfd_map_over_sections (stdoutput, relax_seg, &rsi);
+ rsi.pass++;
+ if (!rsi.changed)
+ break;
+ }
+
+ /* Note - Most ports will use the default value of
+ TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force
+ local symbols to be resolved, removing their frag information.
+ Some ports however, will not have finished relaxing all of
+ their frags and will still need the local symbol frag
+ information. These ports can set
+ TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */
+ finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG;
+
+ bfd_map_over_sections (stdoutput, size_seg, (char *) 0);
+
+ /* Relaxation has completed. Freeze all syms. */
+ finalize_syms = 1;
+
+#ifdef md_post_relax_hook
+ md_post_relax_hook;
+#endif
+
+#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 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
+ *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. */
+ for (untruth = (struct broken_word *) (fragP->fr_symbol);
+ untruth && untruth->dispfrag == fragP;
+ untruth = untruth->next_broken_word)
+ {
+ if (untruth->use_jump == lie)
+ {
+ /* This is the offset from ??? to table_ptr+0.
+ The target is the same for all users of this
+ md_long_jump, but the "sub" bases (and hence the
+ offsets) may be different. */
+ addressT to_word = table_addr - S_GET_VALUE (untruth->sub);
+#ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD
+ TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_word, untruth);
+#endif
+ md_number_to_chars (untruth->word_goes_here, to_word, 2);
+ }
+ }
+
+ /* Install the long jump. */
+ /* This is a long jump from table_ptr+0 to the final target. */
+ from_addr = table_addr;
+ to_addr = S_GET_VALUE (lie->add) + lie->addnum;
+ md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag,
+ lie->add);
+ table_ptr += md_long_jump_size;
+ table_addr += md_long_jump_size;
+ }
+ }
+ }
+#endif /* not WORKING_DOT_WORD */
+
+ /* Resolve symbol values. This needs to be done before processing
+ the relocations. */
+ if (symbol_rootP)
+ {
+ symbolS *symp;
+
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ resolve_symbol_value (symp);
+ }
+ resolve_local_symbol_values ();
+ resolve_reloc_expr_symbols ();
+
+ 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);
+
+#ifdef tc_frob_file_before_fix
+ tc_frob_file_before_fix ();
+#endif
+#ifdef obj_frob_file_before_fix
+ obj_frob_file_before_fix ();
+#endif
+
+ bfd_map_over_sections (stdoutput, fix_segment, (char *) 0);
+
+ /* Set up symbol table, and write it out. */
+ if (symbol_rootP)
+ {
+ symbolS *symp;
+ bfd_boolean skip_next_symbol = FALSE;
+
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ {
+ int punt = 0;
+ const char *name;
+
+ if (skip_next_symbol)
+ {
+ /* Don't do anything besides moving the value of the
+ symbol from the GAS value-field to the BFD value-field. */
+ symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);
+ skip_next_symbol = FALSE;
+ continue;
+ }
+
+ if (symbol_mri_common_p (symp))
+ {
+ if (S_IS_EXTERNAL (symp))
+ as_bad (_("%s: global symbols not supported in common sections"),
+ S_GET_NAME (symp));
+ symbol_remove (symp, &symbol_rootP, &symbol_lastP);
+ continue;
+ }
+
+ name = S_GET_NAME (symp);
+ if (name)
+ {
+ const char *name2 =
+ decode_local_label_name ((char *) S_GET_NAME (symp));
+ /* They only differ if `name' is a fb or dollar local
+ label name. */
+ if (name2 != name && ! S_IS_DEFINED (symp))
+ as_bad (_("local label `%s' is not defined"), name2);
+ }
+
+ /* Do it again, because adjust_reloc_syms might introduce
+ more symbols. They'll probably only be section symbols,
+ but they'll still need to have the values computed. */
+ resolve_symbol_value (symp);
+
+ /* Skip symbols which were equated to undefined or common
+ symbols. */
+ if (symbol_equated_reloc_p (symp)
+ || S_IS_WEAKREFR (symp))
+ {
+ const char *sname = S_GET_NAME (symp);
+
+ if (S_IS_COMMON (symp)
+ && !TC_FAKE_LABEL (sname)
+ && !S_IS_WEAKREFR (symp)
+ && (!S_IS_EXTERNAL (symp) || S_IS_LOCAL (symp)))
+ {
+ expressionS *e = symbol_get_value_expression (symp);
+
+ as_bad (_("Local symbol `%s' can't be equated to common symbol `%s'"),
+ sname, S_GET_NAME (e->X_add_symbol));
+ }
+ if (S_GET_SEGMENT (symp) == reg_section)
+ {
+ /* Report error only if we know the symbol name. */
+ if (S_GET_NAME (symp) != reg_section->name)
+ as_bad (_("can't make global register symbol `%s'"),
+ sname);
+ }
+ symbol_remove (symp, &symbol_rootP, &symbol_lastP);
+ continue;
+ }
+
+#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 (symp == abs_section_sym
+ || (! EMIT_SECTION_SYMBOLS
+ && symbol_section_p (symp))
+ /* Note that S_IS_EXTERNAL and S_IS_LOCAL are not always
+ opposites. Sometimes the former checks flags and the
+ latter examines the name... */
+ || (!S_IS_EXTERNAL (symp)
+ && (punt || S_IS_LOCAL (symp) ||
+ (S_IS_WEAKREFD (symp) && ! symbol_used_p (symp)))
+ && ! 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);
+
+ /* A warning construct is a warning symbol followed by the
+ symbol warned about. Don't let anything object-format or
+ target-specific muck with it; it's ready for output. */
+ if (symbol_get_bfdsym (symp)->flags & BSF_WARNING)
+ skip_next_symbol = TRUE;
+ }
+ }
+
+ 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
+
+ /* Stop if there is an error. */
+ if (had_errors ())
+ return;
+
+ /* 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
+#ifdef obj_coff_generate_pdata
+ obj_coff_generate_pdata ();
+#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
+
+ /* Once all relocations have been written, we can compress the
+ contents of the debug sections. This needs to be done before
+ we start writing any sections, because it will affect the file
+ layout, which is fixed once we start writing contents. */
+ if (flag_compress_debug)
+ bfd_map_over_sections (stdoutput, compress_debug, (char *) 0);
+
+ bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
+}
+
+#ifdef TC_GENERIC_RELAX_TABLE
+/* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */
+
+long
+relax_frag (segT segment, fragS *fragP, long stretch)
+{
+ const relax_typeS *this_type;
+ const relax_typeS *start_type;
+ relax_substateT next_state;
+ relax_substateT this_state;
+ offsetT growth;
+ offsetT aim;
+ addressT target;
+ addressT address;
+ symbolS *symbolP;
+ const relax_typeS *table;
+
+ target = fragP->fr_offset;
+ address = fragP->fr_address;
+ table = TC_GENERIC_RELAX_TABLE;
+ this_state = fragP->fr_subtype;
+ start_type = this_type = table + this_state;
+ symbolP = fragP->fr_symbol;
+
+ if (symbolP)
+ {
+ fragS *sym_frag;
+
+ sym_frag = symbol_get_frag (symbolP);
+
+#ifndef DIFF_EXPR_OK
+ know (sym_frag != NULL);
+#endif
+ know (S_GET_SEGMENT (symbolP) != absolute_section
+ || sym_frag == &zero_address_frag);
+ target += S_GET_VALUE (symbolP);
+
+ /* If SYM_FRAG has yet to be reached on this pass, assume it
+ will move by STRETCH just as we did, unless there is an
+ alignment frag between here and SYM_FRAG. An alignment may
+ well absorb any STRETCH, and we don't want to choose a larger
+ branch insn by overestimating the needed reach of this
+ branch. It isn't critical to calculate TARGET exactly; We
+ know we'll be doing another pass if STRETCH is non-zero. */
+
+ if (stretch != 0
+ && sym_frag->relax_marker != fragP->relax_marker
+ && S_GET_SEGMENT (symbolP) == segment)
+ {
+ if (stretch < 0
+ || sym_frag->region == fragP->region)
+ target += stretch;
+ /* If we get here we know we have a forward branch. This
+ relax pass may have stretched previous instructions so
+ far that omitting STRETCH would make the branch
+ negative. Don't allow this in case the negative reach is
+ large enough to require a larger branch instruction. */
+ else if (target < address)
+ target = fragP->fr_next->fr_address + stretch;
+ }
+ }
+
+ aim = target - address - fragP->fr_fix;
+#ifdef TC_PCREL_ADJUST
+ /* Currently only the ns32k family needs this. */
+ aim += TC_PCREL_ADJUST (fragP);
+#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 (register relax_addressT address, /* Address now. */
+ register int alignment /* Alignment (binary). */)
+{
+ relax_addressT mask;
+ relax_addressT new_address;
+
+ mask = ~((~0) << alignment);
+ new_address = (address + mask) & (~mask);
+#ifdef LINKER_RELAXING_SHRINKS_ONLY
+ if (linkrelax)
+ /* We must provide lots of padding, so the linker can discard it
+ when needed. The linker will not add extra space, ever. */
+ new_address += (1 << alignment);
+#endif
+ return (new_address - address);
+}
+
+/* Now we have a segment, not a crowd of sub-segments, we can make
+ fr_address values.
+
+ Relax the frags.
+
+ After this, all frags in this segment have addresses that are correct
+ within the segment. Since segments live in different file addresses,
+ these frag addresses may not be the same as final object-file
+ addresses. */
+
+int
+relax_segment (struct frag *segment_frag_root, segT segment, int pass)
+{
+ unsigned long frag_count;
+ struct frag *fragP;
+ relax_addressT address;
+ int region;
+ int ret;
+
+ /* 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;
+ region = 0;
+ for (frag_count = 0, fragP = segment_frag_root;
+ fragP;
+ fragP = fragP->fr_next, frag_count ++)
+ {
+ fragP->region = region;
+ fragP->relax_marker = 0;
+ fragP->fr_address = address;
+ address += fragP->fr_fix;
+
+ switch (fragP->fr_type)
+ {
+ case rs_fill:
+ address += fragP->fr_offset * fragP->fr_var;
+ break;
+
+ case rs_align:
+ case rs_align_code:
+ case rs_align_test:
+ {
+ addressT offset = relax_align (address, (int) fragP->fr_offset);
+
+ if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype)
+ offset = 0;
+
+ if (offset % fragP->fr_var != 0)
+ {
+ as_bad_where (fragP->fr_file, fragP->fr_line,
+ _("alignment padding (%lu bytes) not a multiple of %ld"),
+ (unsigned long) offset, (long) fragP->fr_var);
+ offset -= (offset % fragP->fr_var);
+ }
+
+ address += offset;
+ region += 1;
+ }
+ break;
+
+ case rs_org:
+ /* Assume .org is nugatory. It will grow with 1st relax. */
+ region += 1;
+ break;
+
+ case rs_space:
+ break;
+
+ case rs_machine_dependent:
+ /* If fr_symbol is an expression, this call to
+ resolve_symbol_value sets up the correct segment, which will
+ likely be needed in md_estimate_size_before_relax. */
+ if (fragP->fr_symbol)
+ resolve_symbol_value (fragP->fr_symbol);
+
+ address += md_estimate_size_before_relax (fragP, segment);
+ break;
+
+#ifndef WORKING_DOT_WORD
+ /* Broken words don't concern us yet. */
+ case rs_broken_word:
+ break;
+#endif
+
+ case rs_leb128:
+ /* Initial guess is always 1; doing otherwise can result in
+ stable solutions that are larger than the minimum. */
+ address += fragP->fr_offset = 1;
+ break;
+
+ case rs_cfa:
+ address += eh_frame_estimate_size_before_relax (fragP);
+ break;
+
+ case rs_dwarf2dbg:
+ address += dwarf2dbg_estimate_size_before_relax (fragP);
+ break;
+
+ default:
+ BAD_CASE (fragP->fr_type);
+ break;
+ }
+ }
+
+ /* Do relax(). */
+ {
+ unsigned long max_iterations;
+
+ /* Cumulative address adjustment. */
+ offsetT stretch;
+
+ /* Have we made any adjustment this pass? We can't just test
+ stretch because one piece of code may have grown and another
+ shrank. */
+ int stretched;
+
+ /* Most horrible, but gcc may give us some exception data that
+ is impossible to assemble, of the form
+
+ .align 4
+ .byte 0, 0
+ .uleb128 end - start
+ start:
+ .space 128*128 - 1
+ .align 4
+ end:
+
+ If the leb128 is two bytes in size, then end-start is 128*128,
+ which requires a three byte leb128. If the leb128 is three
+ bytes in size, then end-start is 128*128-1, which requires a
+ two byte leb128. We work around this dilemma by inserting
+ an extra 4 bytes of alignment just after the .align. This
+ works because the data after the align is accessed relative to
+ the end label.
+
+ This counter is used in a tiny state machine to detect
+ whether a leb128 followed by an align is impossible to
+ relax. */
+ int rs_leb128_fudge = 0;
+
+ /* We want to prevent going into an infinite loop where one frag grows
+ depending upon the location of a symbol which is in turn moved by
+ the growing frag. eg:
+
+ foo = .
+ .org foo+16
+ foo = .
+
+ So we dictate that this algorithm can be at most O2. */
+ max_iterations = frag_count * frag_count;
+ /* Check for overflow. */
+ if (max_iterations < frag_count)
+ max_iterations = frag_count;
+
+ ret = 0;
+ do
+ {
+ stretch = 0;
+ stretched = 0;
+
+ for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
+ {
+ offsetT growth = 0;
+ addressT was_address;
+ offsetT offset;
+ symbolS *symbolP;
+
+ fragP->relax_marker ^= 1;
+ was_address = fragP->fr_address;
+ address = fragP->fr_address += stretch;
+ symbolP = fragP->fr_symbol;
+ offset = fragP->fr_offset;
+
+ switch (fragP->fr_type)
+ {
+ case rs_fill: /* .fill never relaxes. */
+ growth = 0;
+ break;
+
+#ifndef WORKING_DOT_WORD
+ /* JF: This is RMS's idea. I do *NOT* want to be blamed
+ for it I do not want to write it. I do not want to have
+ anything to do with it. This is not the proper way to
+ implement this misfeature. */
+ case rs_broken_word:
+ {
+ struct broken_word *lie;
+ struct broken_word *untruth;
+
+ /* Yes this is ugly (storing the broken_word pointer
+ in the symbol slot). Still, this whole chunk of
+ code is ugly, and I don't feel like doing anything
+ about it. Think of it as stubbornness in action. */
+ growth = 0;
+ for (lie = (struct broken_word *) (fragP->fr_symbol);
+ lie && lie->dispfrag == fragP;
+ lie = lie->next_broken_word)
+ {
+
+ if (lie->added)
+ continue;
+
+ offset = (S_GET_VALUE (lie->add)
+ + lie->addnum
+ - S_GET_VALUE (lie->sub));
+ if (offset <= -32768 || offset >= 32767)
+ {
+ if (flag_warn_displacement)
+ {
+ char buf[50];
+ sprint_value (buf, (addressT) lie->addnum);
+ as_warn_where (fragP->fr_file, fragP->fr_line,
+ _(".word %s-%s+%s didn't fit"),
+ S_GET_NAME (lie->add),
+ S_GET_NAME (lie->sub),
+ buf);
+ }
+ if (fragP->fr_subtype == 0)
+ {
+ fragP->fr_subtype++;
+ growth += md_short_jump_size;
+ }
+
+ /* Redirect *all* words of this table with the same
+ target, lest we have to handle the case where the
+ same target but with a offset that fits on this
+ round overflows at the next relaxation round. */
+ for (untruth = (struct broken_word *) (fragP->fr_symbol);
+ 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;
+ }
+
+ lie->added = 1;
+ growth += md_long_jump_size;
+ }
+ }
+
+ break;
+ } /* case rs_broken_word */
+#endif
+ case rs_align:
+ case rs_align_code:
+ case rs_align_test:
+ {
+ addressT oldoff, newoff;
+
+ oldoff = relax_align (was_address + fragP->fr_fix,
+ (int) offset);
+ newoff = relax_align (address + fragP->fr_fix,
+ (int) offset);
+
+ if (fragP->fr_subtype != 0)
+ {
+ if (oldoff > fragP->fr_subtype)
+ oldoff = 0;
+ if (newoff > fragP->fr_subtype)
+ newoff = 0;
+ }
+
+ growth = newoff - oldoff;
+
+ /* If this align happens to follow a leb128 and
+ we have determined that the leb128 is bouncing
+ in size, then break the cycle by inserting an
+ extra alignment. */
+ if (growth < 0
+ && (rs_leb128_fudge & 16) != 0
+ && (rs_leb128_fudge & 15) >= 2)
+ {
+ segment_info_type *seginfo = seg_info (segment);
+ struct obstack *ob = &seginfo->frchainP->frch_obstack;
+ struct frag *newf;
+
+ newf = frag_alloc (ob);
+ obstack_blank_fast (ob, fragP->fr_var);
+ obstack_finish (ob);
+ memcpy (newf, fragP, SIZEOF_STRUCT_FRAG);
+ memcpy (newf->fr_literal,
+ fragP->fr_literal + fragP->fr_fix,
+ fragP->fr_var);
+ newf->fr_type = rs_fill;
+ newf->fr_address = address + fragP->fr_fix + newoff;
+ newf->fr_fix = 0;
+ newf->fr_offset = (((offsetT) 1 << fragP->fr_offset)
+ / fragP->fr_var);
+ if (newf->fr_offset * newf->fr_var
+ != (offsetT) 1 << fragP->fr_offset)
+ {
+ newf->fr_offset = (offsetT) 1 << fragP->fr_offset;
+ newf->fr_var = 1;
+ }
+ /* Include size of new frag in GROWTH. */
+ growth += newf->fr_offset * newf->fr_var;
+ /* Adjust the new frag address for the amount
+ we'll add when we process the new frag. */
+ newf->fr_address -= stretch + growth;
+ newf->relax_marker ^= 1;
+ fragP->fr_next = newf;
+#ifdef DEBUG
+ as_warn (_("padding added"));
+#endif
+ }
+ }
+ break;
+
+ case rs_org:
+ {
+ addressT target = offset;
+ addressT after;
+
+ if (symbolP)
+ {
+ /* Convert from an actual address to an octet offset
+ into the section. Here it is assumed that the
+ section's VMA is zero, and can omit subtracting it
+ from the symbol's value to get the address offset. */
+ know (S_GET_SEGMENT (symbolP)->vma == 0);
+ target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE;
+ }
+
+ know (fragP->fr_next);
+ after = fragP->fr_next->fr_address + stretch;
+ growth = target - after;
+ if (growth < 0)
+ {
+ growth = 0;
+
+ /* Don't error on first few frag relax passes.
+ The symbol might be an expression involving
+ symbol values from other sections. If those
+ sections have not yet been processed their
+ frags will all have zero addresses, so we
+ will calculate incorrect values for them. The
+ number of passes we allow before giving an
+ error is somewhat arbitrary. It should be at
+ least one, with larger values requiring
+ increasingly contrived dependencies between
+ frags to trigger a false error. */
+ if (pass < 2)
+ {
+ /* Force another pass. */
+ ret = 1;
+ break;
+ }
+
+ /* 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 move .org backwards"));
+
+ /* We've issued an error message. Change the
+ frag to avoid cascading errors. */
+ fragP->fr_type = rs_align;
+ fragP->fr_subtype = 0;
+ fragP->fr_offset = 0;
+ fragP->fr_fix = after - address;
+ }
+ }
+ break;
+
+ case rs_space:
+ growth = 0;
+ if (symbolP)
+ {
+ offsetT amount;
+
+ amount = S_GET_VALUE (symbolP);
+ if (S_GET_SEGMENT (symbolP) != absolute_section
+ || S_IS_COMMON (symbolP)
+ || ! S_IS_DEFINED (symbolP))
+ {
+ as_bad_where (fragP->fr_file, fragP->fr_line,
+ _(".space specifies non-absolute value"));
+ /* Prevent repeat of this error message. */
+ fragP->fr_symbol = 0;
+ }
+ else if (amount < 0)
+ {
+ /* Don't error on first few frag relax passes.
+ See rs_org comment for a longer explanation. */
+ if (pass < 2)
+ {
+ ret = 1;
+ break;
+ }
+
+ as_warn_where (fragP->fr_file, fragP->fr_line,
+ _(".space or .fill with negative value, ignored"));
+ fragP->fr_symbol = 0;
+ }
+ else
+ growth = (was_address + fragP->fr_fix + amount
+ - fragP->fr_next->fr_address);
+ }
+ break;
+
+ case rs_machine_dependent:
+#ifdef md_relax_frag
+ growth = md_relax_frag (segment, fragP, stretch);
+#else
+#ifdef TC_GENERIC_RELAX_TABLE
+ /* The default way to relax a frag is to look through
+ TC_GENERIC_RELAX_TABLE. */
+ growth = relax_frag (segment, fragP, stretch);
+#endif /* TC_GENERIC_RELAX_TABLE */
+#endif
+ break;
+
+ case rs_leb128:
+ {
+ valueT value;
+ offsetT size;
+
+ value = resolve_symbol_value (fragP->fr_symbol);
+ size = sizeof_leb128 (value, fragP->fr_subtype);
+ growth = size - fragP->fr_offset;
+ fragP->fr_offset = size;
+ }
+ break;
+
+ case rs_cfa:
+ growth = eh_frame_relax_frag (fragP);
+ break;
+
+ case rs_dwarf2dbg:
+ growth = dwarf2dbg_relax_frag (fragP);
+ break;
+
+ default:
+ BAD_CASE (fragP->fr_type);
+ break;
+ }
+ if (growth)
+ {
+ stretch += growth;
+ stretched = 1;
+ if (fragP->fr_type == rs_leb128)
+ rs_leb128_fudge += 16;
+ else if (fragP->fr_type == rs_align
+ && (rs_leb128_fudge & 16) != 0
+ && stretch == 0)
+ rs_leb128_fudge += 16;
+ else
+ rs_leb128_fudge = 0;
+ }
+ }
+
+ if (stretch == 0
+ && (rs_leb128_fudge & 16) == 0
+ && (rs_leb128_fudge & -16) != 0)
+ rs_leb128_fudge += 1;
+ else
+ rs_leb128_fudge = 0;
+ }
+ /* Until nothing further to relax. */
+ while (stretched && -- max_iterations);
+
+ if (stretched)
+ as_fatal (_("Infinite loop encountered whilst attempting to compute the addresses of symbols in section %s"),
+ segment_name (segment));
+ }
+
+ for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
+ if (fragP->last_fr_address != fragP->fr_address)
+ {
+ fragP->last_fr_address = fragP->fr_address;
+ ret = 1;
+ }
+ return ret;
+}
+
+void
+number_to_chars_bigendian (char *buf, valueT val, int n)
+{
+ if (n <= 0)
+ abort ();
+ while (n--)
+ {
+ buf[n] = val & 0xff;
+ val >>= 8;
+ }
+}
+
+void
+number_to_chars_littleendian (char *buf, valueT val, int n)
+{
+ if (n <= 0)
+ abort ();
+ while (n--)
+ {
+ *buf++ = val & 0xff;
+ val >>= 8;
+ }
+}
+
+void
+write_print_statistics (FILE *file)
+{
+ fprintf (file, "fixups: %d\n", n_fixups);
+}
+
+/* For debugging. */
+extern int indent_level;
+
+void
+print_fixup (fixS *fixp)
+{
+ indent_level = 1;
+ fprintf (stderr, "fix ");
+ fprintf_vma (stderr, (bfd_vma)((bfd_hostptr_t) fixp));
+ fprintf (stderr, " %s:%d",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=", fixp->fx_size);
+ fprintf_vma (stderr, (bfd_vma) ((bfd_hostptr_t) fixp->fx_frag));
+ fprintf (stderr, " where=%ld offset=%lx addnumber=%lx",
+ (long) fixp->fx_where,
+ (unsigned long) fixp->fx_offset,
+ (unsigned long) fixp->fx_addnumber);
+ fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type),
+ fixp->fx_r_type);
+ 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
+}