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Ignore DWARF debug information with a version of 0 - assume that it is padding.

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PR 19872
bfd	* dwarf2.c (parse_comp_unit): Skip warning about unrecognised
	version number if the version is zero.

bin	* dwarf.c (display_debug_aranges): Skip warning about unrecognised
	version number if the version is zero.
This commit is contained in:
Nick Clifton
2016-04-04 12:53:33 +01:00
parent 26cdfd9205
commit 67f101eece
7 changed files with 276 additions and 73 deletions
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92
ld/emultempl/pe.em
View File

@ -1059,10 +1059,38 @@ pe_undef_cdecl_match (struct bfd_link_hash_entry *h, void *inf)
return TRUE;
}
/* Change UNDEF to a defined symbol, taking data from SYM. */
static void
change_undef (struct bfd_link_hash_entry * undef,
struct bfd_link_hash_entry * sym)
{
static bfd_boolean gave_warning_message = FALSE;
undef->type = bfd_link_hash_defined;
undef->u.def.value = sym->u.def.value;
undef->u.def.section = sym->u.def.section;
if (pe_enable_stdcall_fixup == -1)
{
einfo (_("Warning: resolving %s by linking to %s\n"),
undef->root.string, sym->root.string);
if (! gave_warning_message)
{
einfo (_("Use --enable-stdcall-fixup to disable these warnings\n"));
einfo (_("Use --disable-stdcall-fixup to disable these fixups\n"));
gave_warning_message = TRUE;
}
}
/* PR 19803: Make sure that the linked symbol is not garbage collected. */
lang_add_gc_name (sym->root.string);
}
static void
pe_fixup_stdcalls (void)
{
static int gave_warning_message = 0;
struct bfd_link_hash_entry *undef, *sym;
if (pe_dll_extra_pe_debug)
@ -1071,69 +1099,39 @@ pe_fixup_stdcalls (void)
for (undef = link_info.hash->undefs; undef; undef=undef->u.undef.next)
if (undef->type == bfd_link_hash_undefined)
{
char* at = strchr (undef->root.string, '@');
int lead_at = (*undef->root.string == '@');
const char * name = undef->root.string;
char * at;
int lead_at = (*name == '@');
if (lead_at)
at = strchr (undef->root.string + 1, '@');
at = strchr (name + 1, '@');
else
at = strchr (name, '@');
if (at || lead_at)
{
/* The symbol is a stdcall symbol, so let's look for a
cdecl symbol with the same name and resolve to that. */
char *cname = xstrdup (undef->root.string);
char *cname = xstrdup (name);
if (lead_at)
*cname = '_';
at = strchr (cname, '@');
if (at)
*at = 0;
sym = bfd_link_hash_lookup (link_info.hash, cname, 0, 0, 1);
if (at)
* strchr (cname, '@') = 0;
sym = bfd_link_hash_lookup (link_info.hash, cname, FALSE, FALSE, TRUE);
if (sym && sym->type == bfd_link_hash_defined)
{
undef->type = bfd_link_hash_defined;
undef->u.def.value = sym->u.def.value;
undef->u.def.section = sym->u.def.section;
if (pe_enable_stdcall_fixup == -1)
{
einfo (_("Warning: resolving %s by linking to %s\n"),
undef->root.string, cname);
if (! gave_warning_message)
{
gave_warning_message = 1;
einfo (_("Use --enable-stdcall-fixup to disable these warnings\n"));
einfo (_("Use --disable-stdcall-fixup to disable these fixups\n"));
}
}
}
change_undef (undef, sym);
}
else
{
/* The symbol is a cdecl symbol, so we look for stdcall
symbols - which means scanning the whole symbol table. */
pe_undef_found_sym = 0;
pe_undef_found_sym = NULL;
bfd_link_hash_traverse (link_info.hash, pe_undef_cdecl_match,
(char *) undef->root.string);
sym = pe_undef_found_sym;
if (sym)
{
undef->type = bfd_link_hash_defined;
undef->u.def.value = sym->u.def.value;
undef->u.def.section = sym->u.def.section;
if (pe_enable_stdcall_fixup == -1)
{
einfo (_("Warning: resolving %s by linking to %s\n"),
undef->root.string, sym->root.string);
if (! gave_warning_message)
{
gave_warning_message = 1;
einfo (_("Use --enable-stdcall-fixup to disable these warnings\n"));
einfo (_("Use --disable-stdcall-fixup to disable these fixups\n"));
}
}
}
(char *) name);
if (pe_undef_found_sym)
change_undef (undef, pe_undef_found_sym);
}
}
}

3
ld/pe-dll.c
View File

@ -905,6 +905,9 @@ process_def_file_and_drectve (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *
{
*name = '_';
strcpy (name + 1, int_name);
/* PR 19803: The alias must be preserved as well. */
lang_add_gc_name (xstrdup (name));
}
else
strcpy (name, int_name);