/* write.c - emit .o file
- Copyright (C) 1986-2014 Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
-/* This thing should be set up to do byteordering correctly. But... */
+/* This thing should be set up to do byte ordering 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
(TC_FORCE_RELOCATION (FIX))
#endif
-#ifndef TC_FORCE_RELOCATION_LOCAL
-#define TC_FORCE_RELOCATION_LOCAL(FIX) \
+#define GENERIC_FORCE_RELOCATION_LOCAL(FIX) \
(!(FIX)->fx_pcrel \
|| TC_FORCE_RELOCATION (FIX))
+#ifndef TC_FORCE_RELOCATION_LOCAL
+#define TC_FORCE_RELOCATION_LOCAL GENERIC_FORCE_RELOCATION_LOCAL
#endif
+#define GENERIC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
+ (!SEG_NORMAL (SEG))
#ifndef TC_FORCE_RELOCATION_SUB_SAME
-#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
- (! SEG_NORMAL (SEG))
+#define TC_FORCE_RELOCATION_SUB_SAME GENERIC_FORCE_RELOCATION_SUB_SAME
#endif
#ifndef md_register_arithmetic
static fixS *
fix_new_internal (fragS *frag, /* Which frag? */
- int where, /* Where in that frag? */
- int size, /* 1, 2, or 4 usually. */
+ unsigned long where, /* Where in that frag? */
+ unsigned long size, /* 1, 2, or 4 usually. */
symbolS *add_symbol, /* X_add_symbol. */
symbolS *sub_symbol, /* X_op_symbol. */
offsetT offset, /* X_add_number. */
/* 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);
+ as_bad (_("field fx_size too small to hold %lu"), size);
abort ();
}
fixP->fx_addsy = add_symbol;
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;
TC_INIT_FIX_DATA (fixP);
#endif
- as_where (&fixP->fx_file, &fixP->fx_line);
+ fixP->fx_file = as_where (&fixP->fx_line);
{
/* 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. */
+fix_new (fragS *frag, /* Which frag? */
+ unsigned long where, /* Where in that frag? */
+ unsigned long 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. */)
fixS *
fix_new_exp (fragS *frag, /* Which frag? */
- int where, /* Where in that frag? */
- int size, /* 1, 2, or 4 usually. */
+ unsigned long where, /* Where in that frag? */
+ unsigned long size, /* 1, 2, or 4 usually. */
expressionS *exp, /* Expression. */
int pcrel, /* TRUE if PC-relative relocation. */
RELOC_ENUM r_type /* Relocation type. */)
as for fix_new, except that WHERE is implicitly 0. */
fixS *
-fix_at_start (fragS *frag, int size, symbolS *add_symbol,
+fix_at_start (fragS *frag, unsigned long size, symbolS *add_symbol,
offsetT offset, int pcrel, RELOC_ENUM r_type)
{
return fix_new_internal (frag, 0, size, add_symbol,
segT seg,
/* Alignment, as a power of 2 (e.g., 1 => 2-byte
boundary, 2 => 4-byte boundary, etc.) */
- int align)
+ unsigned int align)
{
if (seg == absolute_section)
return;
- if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg))
- bfd_set_section_alignment (stdoutput, seg, align);
+ if (align > bfd_section_alignment (seg))
+ bfd_set_section_alignment (seg, align);
}
int
if (seg == absolute_section)
return 0;
- return bfd_get_section_alignment (stdoutput, seg);
+ return bfd_section_alignment (seg);
}
/* Reset the section indices after removing the gas created sections. */
{
switch (fragP->fr_type)
{
+ case rs_space_nop:
+ goto skip_align;
case rs_align:
case rs_align_code:
case rs_align_test:
#ifdef HANDLE_ALIGN
HANDLE_ALIGN (fragP);
#endif
+ skip_align:
know (fragP->fr_next != NULL);
fragP->fr_offset = (fragP->fr_next->fr_address
- fragP->fr_address
if (fragP->fr_offset < 0)
{
as_bad_where (fragP->fr_file, fragP->fr_line,
- _("attempt to .org/.space backwards? (%ld)"),
+ _("attempt to .org/.space/.nops backwards? (%ld)"),
(long) fragP->fr_offset);
fragP->fr_offset = 0;
}
- fragP->fr_type = rs_fill;
+ if (fragP->fr_type == rs_space_nop)
+ fragP->fr_type = rs_fill_nop;
+ else
+ fragP->fr_type = rs_fill;
break;
case rs_fill:
+ case rs_fill_nop:
break;
case rs_leb128:
valueT value = S_GET_VALUE (fragP->fr_symbol);
int size;
+ if (!S_IS_DEFINED (fragP->fr_symbol))
+ {
+ as_bad_where (fragP->fr_file, fragP->fr_line,
+ _("leb128 operand is an undefined symbol: %s"),
+ S_GET_NAME (fragP->fr_symbol));
+ }
+
size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value,
fragP->fr_subtype);
md_convert_frag (stdoutput, sec, fragP);
gas_assert (fragP->fr_next == NULL
- || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address)
- == fragP->fr_fix));
+ || (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
}
static void
-size_seg (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
+size_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx ATTRIBUTE_UNUSED)
{
flagword flags;
fragS *fragp;
else
size = 0;
- flags = bfd_get_section_flags (abfd, sec);
- if (size == 0 && bfd_get_section_size (sec) != 0 &&
+ flags = bfd_section_flags (sec);
+ if (size == 0 && bfd_section_size (sec) != 0 &&
(flags & SEC_HAS_CONTENTS) != 0)
return;
flags |= SEC_HAS_CONTENTS;
flags &= ~SEC_RELOC;
- x = bfd_set_section_flags (abfd, sec, flags);
+ x = bfd_set_section_flags (sec, flags);
gas_assert (x);
- newsize = md_section_align (sec, size);
- x = bfd_set_section_size (abfd, sec, newsize);
+ /* If permitted, allow the backend to pad out the section
+ to some alignment boundary. */
+ if (do_not_pad_sections_to_alignment)
+ newsize = size;
+ else
+ newsize = md_section_align (sec, size);
+ x = bfd_set_section_size (sec, newsize);
gas_assert (x);
/* If the size had to be rounded up, add some padding in the last
as_bad_where (r->file, r->line, _("invalid reloc expression"));
sec = NULL;
}
- else if (sym != NULL)
+ else if (sym != NULL && sec != NULL)
{
/* Convert relocs against local symbols to refer to the
corresponding section symbol plus offset instead. Keep
if (symsec == NULL)
abort ();
- if (bfd_is_abs_section (symsec))
+ if (bfd_is_abs_section (symsec)
+ || symsec == reg_section)
{
/* The fixup_segment routine normally will not use this
symbol in a relocation. */
/* 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. */
+ are PC-relative and don't cross regions that could change size. */
if (linkrelax && TC_LINKRELAX_FIXUP (this_segment))
{
for (; fixP; fixP = fixP->fx_next)
symbol_mark_used_in_reloc (fixP->fx_subsy);
}
- if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && fixP->fx_size != 0)
+ if (!fixP->fx_no_overflow && fixP->fx_size != 0)
{
if (fixP->fx_size < sizeof (valueT))
{
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"),
+ ngettext ("value of %s too large for field "
+ "of %d byte at %s",
+ "value of %s too large for field "
+ "of %d bytes at %s",
+ fixP->fx_size),
buf2, fixP->fx_size, buf);
} /* Generic error checking. */
}
(long) add_number,
(long) (fragP->fr_address + fixP->fx_where));
#endif
- } /* Not a bit fix. */
+ }
#ifdef TC_VALIDATE_FIX
skip: ATTRIBUTE_UNUSED_LABEL
static void
install_reloc (asection *sec, arelent *reloc, fragS *fragp,
- char *file, unsigned int line)
+ const char *file, unsigned int line)
{
char *err;
bfd_reloc_status_type s;
&& 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)
+write_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec,
+ void *xxx ATTRIBUTE_UNUSED)
{
segment_info_type *seginfo = seg_info (sec);
unsigned int n;
/* Extract relocs for this section from reloc_list. */
rp = &reloc_list;
+
my_reloc_list = NULL;
while ((r = *rp) != NULL)
{
rp = &r->next;
}
- relocs = (arelent **) xcalloc (n, sizeof (arelent *));
+ relocs = XCNEWVEC (arelent *, n);
n = 0;
r = my_reloc_list;
for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
{
int fx_size, slack;
- offsetT loc;
+ valueT loc;
arelent **reloc;
#ifndef RELOC_EXPANSION_POSSIBLE
arelent *rel;
if (n)
{
- flagword flags = bfd_get_section_flags (abfd, sec);
+ flagword flags = bfd_section_flags (sec);
flags |= SEC_RELOC;
- bfd_set_section_flags (abfd, sec, flags);
+ bfd_set_section_flags (sec, flags);
bfd_set_reloc (stdoutput, sec, relocs, n);
}
char *header;
struct z_stream_s *strm;
int x;
- flagword flags = bfd_get_section_flags (abfd, sec);
+ flagword flags = bfd_section_flags (sec);
+ unsigned int header_size, compression_header_size;
if (seginfo == NULL
|| sec->size < 32
|| (flags & (SEC_ALLOC | SEC_HAS_CONTENTS)) == SEC_ALLOC)
return;
- section_name = bfd_get_section_name (stdoutput, sec);
+ section_name = bfd_section_name (sec);
if (strncmp (section_name, ".debug_", 7) != 0)
return;
if (strm == NULL)
return;
- /* Create a new frag to contain the "ZLIB" header. */
+ if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB)
+ {
+ compression_header_size
+ = bfd_get_compression_header_size (stdoutput, NULL);
+ header_size = compression_header_size;
+ }
+ else
+ {
+ compression_header_size = 0;
+ header_size = 12;
+ }
+
+ /* Create a new frag to contain the compression header. */
first_newf = frag_alloc (ob);
- if (obstack_room (ob) < 12)
+ if (obstack_room (ob) < header_size)
first_newf = frag_alloc (ob);
- if (obstack_room (ob) < 12)
- as_fatal (_("can't extend frag %u chars"), 12);
+ if (obstack_room (ob) < header_size)
+ as_fatal (ngettext ("can't extend frag %lu char",
+ "can't extend frag %lu chars",
+ (unsigned long) header_size),
+ (unsigned long) header_size);
last_newf = first_newf;
- obstack_blank_fast (ob, 12);
+ obstack_blank_fast (ob, header_size);
last_newf->fr_type = rs_fill;
- last_newf->fr_fix = 12;
+ last_newf->fr_fix = header_size;
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;
+ compressed_size = header_size;
/* Stream the frags through the compression engine, adding new frags
- as necessary to accomodate the compressed output. */
+ as necessary to accommodate the compressed output. */
for (f = seginfo->frchainP->frch_root;
f;
f = f->fr_next)
break;
}
+ /* PR binutils/18087: If compression didn't make the section smaller,
+ just keep it uncompressed. */
+ if (compressed_size >= uncompressed_size)
+ return;
+
/* 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);
+ bfd_update_compression_header (abfd, (bfd_byte *) header, sec);
+ x = bfd_set_section_size (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;
+ if (!compression_header_size)
+ {
+ compressed_name = concat (".z", section_name + 1, (char *) NULL);
+ bfd_rename_section (sec, compressed_name);
+ }
}
+#ifndef md_generate_nops
+/* Genenerate COUNT bytes of no-op instructions to WHERE. A target
+ backend must override this with proper no-op instructions. */
+
+static void
+md_generate_nops (fragS *f ATTRIBUTE_UNUSED,
+ char *where ATTRIBUTE_UNUSED,
+ offsetT count ATTRIBUTE_UNUSED,
+ int control ATTRIBUTE_UNUSED)
+{
+ as_bad (_("unimplemented .nops directive"));
+}
+#endif
+
static void
write_contents (bfd *abfd ATTRIBUTE_UNUSED,
asection *sec,
/* Write out the frags. */
if (seginfo == NULL
- || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS))
+ || !(bfd_section_flags (sec) & SEC_HAS_CONTENTS))
return;
for (f = seginfo->frchainP->frch_root;
char *fill_literal;
offsetT count;
- gas_assert (f->fr_type == rs_fill);
+ gas_assert (f->fr_type == rs_fill || f->fr_type == rs_fill_nop);
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,
+ as_fatal (ngettext ("can't write %ld byte "
+ "to section %s of %s: '%s'",
+ "can't write %ld bytes "
+ "to section %s of %s: '%s'",
+ (long) f->fr_fix),
+ (long) f->fr_fix,
+ bfd_section_name (sec), bfd_get_filename (stdoutput),
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;
+ fill_literal = f->fr_literal + f->fr_fix;
+
+ if (f->fr_type == rs_fill_nop)
+ {
+ gas_assert (count >= 0 && fill_size == 1);
+ if (count > 0)
+ {
+ char *buf = xmalloc (count);
+ md_generate_nops (f, buf, count, *fill_literal);
+ x = bfd_set_section_contents
+ (stdoutput, sec, buf, (file_ptr) offset,
+ (bfd_size_type) count);
+ if (!x)
+ as_fatal (ngettext ("can't fill %ld byte "
+ "in section %s of %s: '%s'",
+ "can't fill %ld bytes "
+ "in section %s of %s: '%s'",
+ (long) count),
+ (long) count,
+ bfd_section_name (sec),
+ bfd_get_filename (stdoutput),
+ bfd_errmsg (bfd_get_error ()));
+ offset += count;
+ free (buf);
+ }
+ continue;
+ }
+
gas_assert (count >= 0);
if (fill_size && count)
{
(file_ptr) offset,
(bfd_size_type) fill_size);
if (!x)
- as_fatal (_("can't write %s: %s"), stdoutput->filename,
+ as_fatal (ngettext ("can't fill %ld byte "
+ "in section %s of %s: '%s'",
+ "can't fill %ld bytes "
+ "in section %s of %s: '%s'",
+ (long) fill_size),
+ (long) fill_size,
+ bfd_section_name (sec),
+ bfd_get_filename (stdoutput),
bfd_errmsg (bfd_get_error ()));
offset += fill_size;
}
(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,
+ as_fatal (ngettext ("can't fill %ld byte "
+ "in section %s of %s: '%s'",
+ "can't fill %ld bytes "
+ "in section %s of %s: '%s'",
+ (long) (n_per_buf * fill_size)),
+ (long) (n_per_buf * fill_size),
+ bfd_section_name (sec),
+ bfd_get_filename (stdoutput),
bfd_errmsg (bfd_get_error ()));
offset += n_per_buf * fill_size;
}
}
/* Finish the subsegments. After every sub-segment, we fake an
- ".align ...". This conforms to BSD4.2 brane-damage. We then fake
+ ".align ...". This conforms to BSD4.2 brain-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. */
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)
+ (!(FRCHAIN)->frch_next && subseg_text_p (SEG) \
+ && !do_not_pad_sections_to_alignment \
+ ? get_recorded_alignment (SEG) \
+ : 0)
#else
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
#endif
#endif
static void
-subsegs_finish (void)
+subsegs_finish_section (asection *s)
{
struct frchain *frchainP;
- asection *s;
+ segment_info_type *seginfo = seg_info (s);
+ if (!seginfo)
+ return;
- for (s = stdoutput->sections; s; s = s->next)
+ for (frchainP = seginfo->frchainP;
+ frchainP != NULL;
+ frchainP = frchainP->frch_next)
{
- segment_info_type *seginfo = seg_info (s);
- if (!seginfo)
- continue;
+ int alignment;
- for (frchainP = seginfo->frchainP;
- frchainP != NULL;
- frchainP = frchainP->frch_next)
- {
- int alignment = 0;
+ subseg_set (s, frchainP->frch_subseg);
- 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 ())
+ do_not_pad_sections_to_alignment = 1;
- /* 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;
+ alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP);
+ if ((bfd_section_flags (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;
- }
+ while ((entsize & 1) == 0)
+ {
+ ++entalign;
+ entsize >>= 1;
}
- if (subseg_text_p (now_seg))
- frag_align_code (alignment, 0);
- else
- frag_align (alignment, 0, 0);
+ if (entalign > alignment)
+ alignment = entalign;
+ }
- /* frag_align will have left a new frag.
- Use this last frag for an empty ".fill".
+ 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);
+ }
+}
+
+static void
+subsegs_finish (void)
+{
+ asection *s;
+
+ for (s = stdoutput->sections; s; s = s->next)
+ subsegs_finish_section (s);
+}
- 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);
+#ifdef OBJ_ELF
+static void
+create_obj_attrs_section (void)
+{
+ segT s;
+ char *p;
+ offsetT size;
+ const char *name;
+
+ size = bfd_elf_obj_attr_size (stdoutput);
+ if (size == 0)
+ return;
+
+ name = get_elf_backend_data (stdoutput)->obj_attrs_section;
+ if (!name)
+ name = ".gnu.attributes";
+ s = subseg_new (name, 0);
+ elf_section_type (s)
+ = get_elf_backend_data (stdoutput)->obj_attrs_section_type;
+ bfd_set_section_flags (s, SEC_READONLY | SEC_DATA);
+ frag_now_fix ();
+ p = frag_more (size);
+ bfd_elf_set_obj_attr_contents (stdoutput, (bfd_byte *)p, size);
+
+ subsegs_finish_section (s);
+ relax_segment (seg_info (s)->frchainP->frch_root, s, 0);
+ size_seg (stdoutput, s, NULL);
+}
+
+/* Create a relocation against an entry in a GNU Build attribute section. */
+
+static void
+create_note_reloc (segT sec,
+ symbolS * sym,
+ bfd_size_type note_offset,
+ bfd_size_type desc2_offset,
+ int reloc_type,
+ bfd_vma addend,
+ char * note)
+{
+ struct reloc_list * reloc;
+
+ reloc = XNEW (struct reloc_list);
+
+ /* We create a .b type reloc as resolve_reloc_expr_symbols() has already been called. */
+ reloc->u.b.sec = sec;
+ reloc->u.b.s = symbol_get_bfdsym (sym);
+ reloc->u.b.r.sym_ptr_ptr = & reloc->u.b.s;
+ reloc->u.b.r.address = note_offset + desc2_offset;
+ reloc->u.b.r.addend = addend;
+ reloc->u.b.r.howto = bfd_reloc_type_lookup (stdoutput, reloc_type);
+
+ if (reloc->u.b.r.howto == NULL)
+ {
+ as_bad (_("unable to create reloc for build note"));
+ return;
+ }
+
+ reloc->file = N_("<gnu build note>");
+ reloc->line = 0;
+
+ reloc->next = reloc_list;
+ reloc_list = reloc;
+
+ /* For REL relocs, store the addend in the section. */
+ if (! sec->use_rela_p
+ /* The SH target is a special case that uses RELA relocs
+ but still stores the addend in the word being relocated. */
+ || strstr (bfd_get_target (stdoutput), "-sh") != NULL)
+ {
+ if (target_big_endian)
+ {
+ if (bfd_arch_bits_per_address (stdoutput) <= 32)
+ note[desc2_offset + 3] = addend;
+ else
+ note[desc2_offset + 7] = addend;
}
+ else
+ note[desc2_offset] = addend;
+ }
+}
+
+static void
+maybe_generate_build_notes (void)
+{
+ segT sec;
+ char * note;
+ offsetT note_size;
+ offsetT total_size;
+ offsetT desc_size;
+ offsetT desc2_offset;
+ int desc_reloc;
+ symbolS * sym;
+ asymbol * bsym;
+
+ if (! flag_generate_build_notes
+ || bfd_get_section_by_name (stdoutput,
+ GNU_BUILD_ATTRS_SECTION_NAME) != NULL)
+ return;
+
+ /* Create a GNU Build Attribute section. */
+ sec = subseg_new (GNU_BUILD_ATTRS_SECTION_NAME, FALSE);
+ elf_section_type (sec) = SHT_NOTE;
+ bfd_set_section_flags (sec, (SEC_READONLY | SEC_HAS_CONTENTS | SEC_DATA
+ | SEC_OCTETS));
+ bfd_set_section_alignment (sec, 2);
+
+ /* Work out the size of the notes that we will create,
+ and the relocation we should use. */
+ if (bfd_arch_bits_per_address (stdoutput) <= 32)
+ {
+ note_size = 28;
+ desc_size = 8; /* Two 4-byte offsets. */
+ desc2_offset = 24;
+
+ /* FIXME: The BFD backend for the CRX target does not support the
+ BFD_RELOC_32, even though it really should. Likewise for the
+ CR16 target. So we have special case code here... */
+ if (strstr (bfd_get_target (stdoutput), "-crx") != NULL)
+ desc_reloc = BFD_RELOC_CRX_NUM32;
+ else if (strstr (bfd_get_target (stdoutput), "-cr16") != NULL)
+ desc_reloc = BFD_RELOC_CR16_NUM32;
+ else
+ desc_reloc = BFD_RELOC_32;
+ }
+ else
+ {
+ note_size = 36;
+ desc_size = 16; /* Two 8-byte offsets. */
+ desc2_offset = 28;
+ /* FIXME: The BFD backend for the IA64 target does not support the
+ BFD_RELOC_64, even though it really should. The HPPA backend
+ has a similar issue, although it does not support BFD_RELOCs at
+ all! So we have special case code to handle these targets. */
+ if (strstr (bfd_get_target (stdoutput), "-ia64") != NULL)
+ desc_reloc = target_big_endian ? BFD_RELOC_IA64_DIR32MSB : BFD_RELOC_IA64_DIR32LSB;
+ else if (strstr (bfd_get_target (stdoutput), "-hppa") != NULL)
+ desc_reloc = 80; /* R_PARISC_DIR64. */
+ else
+ desc_reloc = BFD_RELOC_64;
}
+
+ /* We have to create a note for *each* code section.
+ Linker garbage collection might discard some. */
+ total_size = 0;
+ note = NULL;
+
+ for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym))
+ if ((bsym = symbol_get_bfdsym (sym)) != NULL
+ && bsym->flags & BSF_SECTION_SYM
+ && bsym->section != NULL
+ /* Skip linkonce sections - we cannot use these section symbols as they may disappear. */
+ && (bsym->section->flags & (SEC_CODE | SEC_LINK_ONCE)) == SEC_CODE
+ /* Not all linkonce sections are flagged... */
+ && strncmp (S_GET_NAME (sym), ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) != 0)
+ {
+ /* Create a version note. */
+ frag_now_fix ();
+ note = frag_more (note_size);
+ memset (note, 0, note_size);
+
+ if (target_big_endian)
+ {
+ note[3] = 8; /* strlen (name) + 1. */
+ note[7] = desc_size; /* Two 8-byte offsets. */
+ note[10] = NT_GNU_BUILD_ATTRIBUTE_OPEN >> 8;
+ note[11] = NT_GNU_BUILD_ATTRIBUTE_OPEN & 0xff;
+ }
+ else
+ {
+ note[0] = 8; /* strlen (name) + 1. */
+ note[4] = desc_size; /* Two 8-byte offsets. */
+ note[8] = NT_GNU_BUILD_ATTRIBUTE_OPEN & 0xff;
+ note[9] = NT_GNU_BUILD_ATTRIBUTE_OPEN >> 8;
+ }
+
+ /* The a1 version number indicates that this note was
+ generated by the assembler and not the gcc annobin plugin. */
+ memcpy (note + 12, "GA$\ 13a1", 8);
+
+ /* Create a relocation to install the start address of the note... */
+ create_note_reloc (sec, sym, total_size, 20, desc_reloc, 0, note);
+
+ /* ...and another one to install the end address. */
+ create_note_reloc (sec, sym, total_size, desc2_offset, desc_reloc,
+ bfd_section_size (bsym->section),
+ note);
+
+ total_size += note_size;
+ /* FIXME: Maybe add a note recording the assembler command line and version ? */
+ }
+
+ /* Install the note(s) into the section. */
+ if (total_size)
+ bfd_set_section_contents (stdoutput, sec, (bfd_byte *) note, 0, total_size);
+ subsegs_finish_section (sec);
+ relax_segment (seg_info (sec)->frchainP->frch_root, sec, 0);
+ size_seg (stdoutput, sec, NULL);
}
+#endif /* OBJ_ELF */
/* Write the object file. */
#endif
/* From now on, we don't care about sub-segments. Build one frag chain
- for each segment. Linked thru fr_next. */
+ for each segment. Linked through fr_next. */
/* Remove the sections created by gas for its own purposes. */
{
/* Relaxation has completed. Freeze all syms. */
finalize_syms = 1;
+ dwarf2dbg_final_check ();
+
#ifdef md_post_relax_hook
md_post_relax_hook;
#endif
+#ifdef OBJ_ELF
+ if (IS_ELF)
+ create_obj_attrs_section ();
+#endif
+
#ifndef WORKING_DOT_WORD
{
struct broken_word *lie;
resolve_local_symbol_values ();
resolve_reloc_expr_symbols ();
+#ifdef OBJ_ELF
+ if (IS_ELF)
+ maybe_generate_build_notes ();
+#endif
+
PROGRESS (1);
#ifdef tc_frob_file_before_adjust
if (S_IS_COMMON (symp)
&& !TC_FAKE_LABEL (sname)
- && !S_IS_WEAKREFR (symp)
- && (!S_IS_EXTERNAL (symp) || S_IS_LOCAL (symp)))
+ && !S_IS_WEAKREFR (symp))
{
expressionS *e = symbol_get_value_expression (symp);
- as_bad (_("Local symbol `%s' can't be equated to common symbol `%s'"),
+ as_bad (_("`%s' can't be equated to common symbol `%s'"),
sname, S_GET_NAME (e->X_add_symbol));
}
if (S_GET_SEGMENT (symp) == reg_section)
#endif
/* Stop if there is an error. */
- if (had_errors ())
+ if (!flag_always_generate_output && had_errors ())
return;
/* Now that all the sizes are known, and contents correct, we can
#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
obj_frob_file_after_relocs ();
#endif
+#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
+ if (IS_ELF && flag_use_elf_stt_common)
+ stdoutput->flags |= BFD_CONVERT_ELF_COMMON | BFD_USE_ELF_STT_COMMON;
+#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);
+ {
+ if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB)
+ stdoutput->flags |= BFD_COMPRESS | BFD_COMPRESS_GABI;
+ else
+ stdoutput->flags |= BFD_COMPRESS;
+ bfd_map_over_sections (stdoutput, compress_debug, (char *) 0);
+ }
bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
}
#ifdef TC_GENERIC_RELAX_TABLE
+#ifndef md_generic_table_relax_frag
+#define md_generic_table_relax_frag relax_frag
+#endif
+
/* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */
long
const relax_typeS *table;
target = fragP->fr_offset;
- address = fragP->fr_address;
+ address = fragP->fr_address + fragP->fr_fix;
table = TC_GENERIC_RELAX_TABLE;
this_state = fragP->fr_subtype;
start_type = this_type = table + this_state;
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;
+ return 0;
}
}
- aim = target - address - fragP->fr_fix;
+ aim = target - address;
#ifdef TC_PCREL_ADJUST
- /* Currently only the ns32k family needs this. */
+ /* Currently only the ns32k and arc needs this. */
aim += TC_PCREL_ADJUST (fragP);
#endif
/* 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_align (relax_addressT address, /* Address now. */
+ int alignment /* Alignment (binary). */)
{
relax_addressT mask;
relax_addressT new_address;
- mask = ~((~0) << alignment);
+ mask = ~((relax_addressT) ~0 << alignment);
new_address = (address + mask) & (~mask);
#ifdef LINKER_RELAXING_SHRINKS_ONLY
if (linkrelax)
if (offset % fragP->fr_var != 0)
{
as_bad_where (fragP->fr_file, fragP->fr_line,
- _("alignment padding (%lu bytes) not a multiple of %ld"),
+ ngettext ("alignment padding (%lu byte) "
+ "not a multiple of %ld",
+ "alignment padding (%lu bytes) "
+ "not a multiple of %ld",
+ (unsigned long) offset),
(unsigned long) offset, (long) fragP->fr_var);
offset -= (offset % fragP->fr_var);
}
break;
case rs_space:
+ case rs_space_nop:
break;
case rs_machine_dependent:
case rs_org:
{
- addressT target = offset;
+ offsetT target = offset;
addressT after;
if (symbolP)
know (fragP->fr_next);
after = fragP->fr_next->fr_address + stretch;
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. */
+ if ((offsetT) (address + fragP->fr_fix) > target)
{
growth = 0;
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"));
break;
case rs_space:
+ case rs_space_nop:
growth = 0;
if (symbolP)
{
}
as_warn_where (fragP->fr_file, fragP->fr_line,
- _(".space or .fill with negative value, ignored"));
+ _(".space, .nops or .fill with negative value, ignored"));
fragP->fr_symbol = 0;
}
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);
+ growth = md_generic_table_relax_frag (segment, fragP,
+ stretch);
#endif /* TC_GENERIC_RELAX_TABLE */
#endif
break;
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)
projects / deliverable / binutils-gdb.git / blobdiff