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Add experimental support for --gc-sections with COFF and PE based targets.

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PR ld/11539
bfd	* coffcode.h (coff_bfd_gc_sections): Define default
	to bfd_coff_gc_sections function.
	* cofflink.c (init_reloc_cookie): Copy and adjust coff
	related code about gc-sections from elflink.c to here.
	(fini_reloc_cookie): Likewise.
	(init_reloc_cookie_rels): Likewise.
	(fini_reloc_cookie_rels): Likewise.
	(init_reloc_cookie_for_section): Likewise.
	(fini_reloc_cookie_for_section): Likewise.
	(_bfd_coff_gc_mark_hook): Likewise.
	(_bfd_coff_gc_mark_rsec): Likewise.
	(_bfd_coff_gc_mark_reloc): Likewise.
	(_bfd_coff_gc_mark): Likewise.
	(_bfd_coff_gc_mark_extra_sections): Likewise.
	(coff_gc_sweep_symbol_info): Likewise.
	(coff_gc_sweep_symbol): Likewise.
	(gc_sweep_hook_fn): Likewise.
	(coff_gc_sweep): Likewise.
	(bfd_coff_gc_sections): Likewise.
	(_bfd_coff_gc_keep): Likewise.
	* libcoff.h (coff_reloc_cookie): New struct.
	(bfd_coff_gc_sections): New prototype.
	(coff_gc_mark_hook_fn): New type.

ld	* scripttempl/pep.sc: Mark .idata*, .CRT*, .tls*,
	.rsrc*, .init, .ctor*, .dtor*, .fini, .jcr,
	.eh_frame, .pdata. .xdata, and .gcc_except_table sections
	as KEEP.
	* scripttempl/pe.sc: Likewise.
This commit is contained in:
Kai Tietz 2015-07-03 15:50:29 +01:00 committed by Nick Clifton
parent b6b3dd8f31
commit 0f088b2a94
12 changed files with 572 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
bfd/ChangeLog
View File

@ -1,3 +1,32 @@
2015-07-03 Kai Tietz <ktietz@redhat.com>
Nick Clifton <nickc@redhat.com>
PR ld/11539
* coffcode.h (coff_bfd_gc_sections): Define default
to bfd_coff_gc_sections function.
(coff_gc_mark_hook_fn): New type.
* coffgen.c (init_reloc_cookie): Copy and adjust coff
related code about gc-sections from elflink.c to here.
(fini_reloc_cookie): Likewise.
(init_reloc_cookie_rels): Likewise.
(fini_reloc_cookie_rels): Likewise.
(init_reloc_cookie_for_section): Likewise.
(fini_reloc_cookie_for_section): Likewise.
(_bfd_coff_gc_mark_hook): Likewise.
(_bfd_coff_gc_mark_rsec): Likewise.
(_bfd_coff_gc_mark_reloc): Likewise.
(_bfd_coff_gc_mark): Likewise.
(_bfd_coff_gc_mark_extra_sections): Likewise.
(coff_gc_sweep_symbol_info): Likewise.
(coff_gc_sweep_symbol): Likewise.
(gc_sweep_hook_fn): Likewise.
(coff_gc_sweep): Likewise.
(bfd_coff_gc_sections): Likewise.
(_bfd_coff_gc_keep): Likewise.
* libcoff-in.h (coff_reloc_cookie): New struct.
(bfd_coff_gc_sections): New prototype.
* libcoff.h: Regenerate.
2015-07-01 Sandra Loosemore <sandra@codesourcery.com>
Cesar Philippidis <cesar@codesourcery.com>

6
bfd/coffcode.h
View File

@ -1352,6 +1352,10 @@ CODE_FRAGMENT
. COFF_SYMBOL_PE_SECTION
.};
.
.typedef asection * (*coff_gc_mark_hook_fn)
. (asection *, struct bfd_link_info *, struct internal_reloc *,
. struct coff_link_hash_entry *, struct internal_syment *);
.
Special entry points for gdb to swap in coff symbol table parts:
.typedef struct
.{
@ -5993,7 +5997,7 @@ static bfd_coff_backend_data bigobj_swap_table =
#endif
#ifndef coff_bfd_gc_sections
#define coff_bfd_gc_sections bfd_generic_gc_sections
#define coff_bfd_gc_sections bfd_coff_gc_sections
#endif
#ifndef coff_bfd_lookup_section_flags

428
bfd/coffgen.c
View File

@ -2626,3 +2626,431 @@ _bfd_coff_section_already_linked (bfd *abfd,
info->callbacks->einfo (_("%F%P: already_linked_table: %E\n"));
return FALSE;
}
/* Initialize COOKIE for input bfd ABFD. */
static bfd_boolean
init_reloc_cookie (struct coff_reloc_cookie *cookie,
struct bfd_link_info *info ATTRIBUTE_UNUSED,
bfd *abfd)
{
/* Sometimes the symbol table does not yet have been loaded here. */
bfd_coff_slurp_symbol_table (abfd);
cookie->abfd = abfd;
cookie->sym_hashes = obj_coff_sym_hashes (abfd);
cookie->symbols = obj_symbols (abfd);
return TRUE;
}
/* Free the memory allocated by init_reloc_cookie, if appropriate. */
static void
fini_reloc_cookie (struct coff_reloc_cookie *cookie ATTRIBUTE_UNUSED,
bfd *abfd ATTRIBUTE_UNUSED)
{
/* Nothing to do. */
}
/* Initialize the relocation information in COOKIE for input section SEC
of input bfd ABFD. */
static bfd_boolean
init_reloc_cookie_rels (struct coff_reloc_cookie *cookie,
struct bfd_link_info *info ATTRIBUTE_UNUSED,
bfd *abfd,
asection *sec)
{
if (sec->reloc_count == 0)
{
cookie->rels = NULL;
cookie->relend = NULL;
cookie->rel = NULL;
return TRUE;
}
cookie->rels = _bfd_coff_read_internal_relocs (abfd, sec, FALSE, NULL, 0, NULL);
if (cookie->rels == NULL)
return FALSE;
cookie->rel = cookie->rels;
cookie->relend = (cookie->rels + sec->reloc_count);
return TRUE;
}
/* Free the memory allocated by init_reloc_cookie_rels,
if appropriate. */
static void
fini_reloc_cookie_rels (struct coff_reloc_cookie *cookie,
asection *sec)
{
if (cookie->rels && coff_section_data (NULL, sec)->relocs != cookie->rels)
free (cookie->rels);
}
/* Initialize the whole of COOKIE for input section SEC. */
static bfd_boolean
init_reloc_cookie_for_section (struct coff_reloc_cookie *cookie,
struct bfd_link_info *info,
asection *sec)
{
if (!init_reloc_cookie (cookie, info, sec->owner))
return FALSE;
if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec))
{
fini_reloc_cookie (cookie, sec->owner);
return FALSE;
}
return TRUE;
}
/* Free the memory allocated by init_reloc_cookie_for_section,
if appropriate. */
static void
fini_reloc_cookie_for_section (struct coff_reloc_cookie *cookie,
asection *sec)
{
fini_reloc_cookie_rels (cookie, sec);
fini_reloc_cookie (cookie, sec->owner);
}
static asection *
_bfd_coff_gc_mark_hook (asection *sec,
struct bfd_link_info *info ATTRIBUTE_UNUSED,
struct internal_reloc *rel ATTRIBUTE_UNUSED,
struct coff_link_hash_entry *h,
struct internal_syment *sym)
{
if (h != NULL)
{
switch (h->root.type)
{
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
return h->root.u.def.section;
case bfd_link_hash_common:
return h->root.u.c.p->section;
case bfd_link_hash_undefined:
case bfd_link_hash_undefweak:
default:
break;
}
return NULL;
}
return coff_section_from_bfd_index (sec->owner, sym->n_scnum);
}
/* COOKIE->rel describes a relocation against section SEC, which is
a section we've decided to keep. Return the section that contains
the relocation symbol, or NULL if no section contains it. */
static asection *
_bfd_coff_gc_mark_rsec (struct bfd_link_info *info, asection *sec,
coff_gc_mark_hook_fn gc_mark_hook,
struct coff_reloc_cookie *cookie)
{
struct coff_link_hash_entry *h;
h = cookie->sym_hashes[cookie->rel->r_symndx];
if (h != NULL)
{
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct coff_link_hash_entry *) h->root.u.i.link;
return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL);
}
return (*gc_mark_hook) (sec, info, cookie->rel, NULL,
&(cookie->symbols
+ obj_convert (sec->owner)[cookie->rel->r_symndx])->native->u.syment);
}
static bfd_boolean _bfd_coff_gc_mark
(struct bfd_link_info *, asection *, coff_gc_mark_hook_fn);
/* COOKIE->rel describes a relocation against section SEC, which is
a section we've decided to keep. Mark the section that contains
the relocation symbol. */
static bfd_boolean
_bfd_coff_gc_mark_reloc (struct bfd_link_info *info,
asection *sec,
coff_gc_mark_hook_fn gc_mark_hook,
struct coff_reloc_cookie *cookie)
{
asection *rsec;
rsec = _bfd_coff_gc_mark_rsec (info, sec, gc_mark_hook, cookie);
if (rsec && !rsec->gc_mark)
{
if (bfd_get_flavour (rsec->owner) != bfd_target_coff_flavour)
rsec->gc_mark = 1;
else if (!_bfd_coff_gc_mark (info, rsec, gc_mark_hook))
return FALSE;
}
return TRUE;
}
/* The mark phase of garbage collection. For a given section, mark
it and any sections in this section's group, and all the sections
which define symbols to which it refers. */
static bfd_boolean
_bfd_coff_gc_mark (struct bfd_link_info *info,
asection *sec,
coff_gc_mark_hook_fn gc_mark_hook)
{
bfd_boolean ret = TRUE;
sec->gc_mark = 1;
/* Look through the section relocs. */
if ((sec->flags & SEC_RELOC) != 0
&& sec->reloc_count > 0)
{
struct coff_reloc_cookie cookie;
if (!init_reloc_cookie_for_section (&cookie, info, sec))
ret = FALSE;
else
{
for (; cookie.rel < cookie.relend; cookie.rel++)
{
if (!_bfd_coff_gc_mark_reloc (info, sec, gc_mark_hook, &cookie))
{
ret = FALSE;
break;
}
}
fini_reloc_cookie_for_section (&cookie, sec);
}
}
return ret;
}
static bfd_boolean
_bfd_coff_gc_mark_extra_sections (struct bfd_link_info *info,
coff_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED)
{
bfd *ibfd;
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
{
asection *isec;
bfd_boolean some_kept;
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
continue;
/* Ensure all linker created sections are kept, and see whether
any other section is already marked. */
some_kept = FALSE;
for (isec = ibfd->sections; isec != NULL; isec = isec->next)
{
if ((isec->flags & SEC_LINKER_CREATED) != 0)
isec->gc_mark = 1;
else if (isec->gc_mark)
some_kept = TRUE;
}
/* If no section in this file will be kept, then we can
toss out debug sections. */
if (!some_kept)
continue;
/* Keep debug and special sections like .comment when they are
not part of a group, or when we have single-member groups. */
for (isec = ibfd->sections; isec != NULL; isec = isec->next)
if ((isec->flags & SEC_DEBUGGING) != 0
|| (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0)
isec->gc_mark = 1;
}
return TRUE;
}
/* Sweep symbols in swept sections. Called via coff_link_hash_traverse. */
static bfd_boolean
coff_gc_sweep_symbol (struct coff_link_hash_entry *h,
void *data ATTRIBUTE_UNUSED)
{
if (h->root.type == bfd_link_hash_warning)
h = (struct coff_link_hash_entry *) h->root.u.i.link;
if ((h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
&& !h->root.u.def.section->gc_mark
&& !(h->root.u.def.section->owner->flags & DYNAMIC))
{
/* Do our best to hide the symbol. */
h->root.u.def.section = bfd_und_section_ptr;
h->symbol_class = C_HIDDEN;
}
return TRUE;
}
/* The sweep phase of garbage collection. Remove all garbage sections. */
typedef bfd_boolean (*gc_sweep_hook_fn)
(bfd *, struct bfd_link_info *, asection *, const struct internal_reloc *);
static bfd_boolean
coff_gc_sweep (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
{
bfd *sub;
for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
{
asection *o;
if (bfd_get_flavour (sub) != bfd_target_coff_flavour)
continue;
for (o = sub->sections; o != NULL; o = o->next)
{
/* Keep debug and special sections. */
if ((o->flags & (SEC_DEBUGGING | SEC_LINKER_CREATED)) != 0
|| (o->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0)
o->gc_mark = 1;
else if (CONST_STRNEQ (o->name, ".idata")
|| CONST_STRNEQ (o->name, ".pdata")
|| CONST_STRNEQ (o->name, ".xdata")
|| CONST_STRNEQ (o->name, ".rsrc"))
o->gc_mark = 1;
if (o->gc_mark)
continue;
/* Skip sweeping sections already excluded. */
if (o->flags & SEC_EXCLUDE)
continue;
/* Since this is early in the link process, it is simple
to remove a section from the output. */
o->flags |= SEC_EXCLUDE;
if (info->print_gc_sections && o->size != 0)
_bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub, o->name);
#if 0
/* But we also have to update some of the relocation
info we collected before. */
if (gc_sweep_hook
&& (o->flags & SEC_RELOC) != 0
&& o->reloc_count > 0
&& !bfd_is_abs_section (o->output_section))
{
struct internal_reloc *internal_relocs;
bfd_boolean r;
internal_relocs
= _bfd_coff_link_read_relocs (o->owner, o, NULL, NULL,
info->keep_memory);
if (internal_relocs == NULL)
return FALSE;
r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs);
if (coff_section_data (o)->relocs != internal_relocs)
free (internal_relocs);
if (!r)
return FALSE;
}
#endif
}
}
/* Remove the symbols that were in the swept sections from the dynamic
symbol table. */
coff_link_hash_traverse (coff_hash_table (info), coff_gc_sweep_symbol,
NULL);
return TRUE;
}
/* Keep all sections containing symbols undefined on the command-line,
and the section containing the entry symbol. */
static void
_bfd_coff_gc_keep (struct bfd_link_info *info)
{
struct bfd_sym_chain *sym;
for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
{
struct coff_link_hash_entry *h;
h = coff_link_hash_lookup (coff_hash_table (info), sym->name,
FALSE, FALSE, FALSE);
if (h != NULL
&& (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
&& !bfd_is_abs_section (h->root.u.def.section))
h->root.u.def.section->flags |= SEC_KEEP;
}
}
/* Do mark and sweep of unused sections. */
bfd_boolean
bfd_coff_gc_sections (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
{
bfd *sub;
/* FIXME: Should we implement this? */
#if 0
const bfd_coff_backend_data *bed = coff_backend_info (abfd);
if (!bed->can_gc_sections
|| !is_coff_hash_table (info->hash))
{
(*_bfd_error_handler)(_("Warning: gc-sections option ignored"));
return TRUE;
}
#endif
_bfd_coff_gc_keep (info);
/* Grovel through relocs to find out who stays ... */
for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
{
asection *o;
if (bfd_get_flavour (sub) != bfd_target_coff_flavour)
continue;
for (o = sub->sections; o != NULL; o = o->next)
{
if (((o->flags & (SEC_EXCLUDE | SEC_KEEP)) == SEC_KEEP
|| CONST_STRNEQ (o->name, ".vectors")
|| CONST_STRNEQ (o->name, ".ctors")
|| CONST_STRNEQ (o->name, ".dtors"))
&& !o->gc_mark)
{
if (!_bfd_coff_gc_mark (info, o, _bfd_coff_gc_mark_hook))
return FALSE;
}
}
}
/* Allow the backend to mark additional target specific sections. */
_bfd_coff_gc_mark_extra_sections (info, _bfd_coff_gc_mark_hook);
/* ... and mark SEC_EXCLUDE for those that go. */
return coff_gc_sweep (abfd, info);
}

12
bfd/libcoff-in.h
View File

@ -265,6 +265,16 @@ struct coff_link_hash_table
struct stab_info stab_info;
};
struct coff_reloc_cookie
{
struct internal_reloc * rels;
struct internal_reloc * rel;
struct internal_reloc * relend;
struct coff_symbol_struct * symbols; /* Symtab for input bfd. */
bfd * abfd;
struct coff_link_hash_entry ** sym_hashes;
};
/* Look up an entry in a COFF linker hash table. */
#define coff_link_hash_lookup(table, string, create, copy, follow) \
@ -562,6 +572,8 @@ extern bfd_boolean _bfd_coff_link_input_bfd
extern bfd_boolean _bfd_coff_reloc_link_order
(bfd *, struct coff_final_link_info *, asection *,
struct bfd_link_order *);
extern bfd_boolean bfd_coff_gc_sections
(bfd *, struct bfd_link_info *);
#define coff_get_section_contents_in_window \

16
bfd/libcoff.h
View File

@ -269,6 +269,16 @@ struct coff_link_hash_table
struct stab_info stab_info;
};
struct coff_reloc_cookie
{
struct internal_reloc * rels;
struct internal_reloc * rel;
struct internal_reloc * relend;
struct coff_symbol_struct * symbols; /* Symtab for input bfd. */
bfd * abfd;
struct coff_link_hash_entry ** sym_hashes;
};
/* Look up an entry in a COFF linker hash table. */
#define coff_link_hash_lookup(table, string, create, copy, follow) \
@ -566,6 +576,8 @@ extern bfd_boolean _bfd_coff_link_input_bfd
extern bfd_boolean _bfd_coff_reloc_link_order
(bfd *, struct coff_final_link_info *, asection *,
struct bfd_link_order *);
extern bfd_boolean bfd_coff_gc_sections
(bfd *, struct bfd_link_info *);
#define coff_get_section_contents_in_window \
@ -673,6 +685,10 @@ enum coff_symbol_classification
COFF_SYMBOL_PE_SECTION
};
typedef asection * (*coff_gc_mark_hook_fn)
(asection *, struct bfd_link_info *, struct internal_reloc *,
struct coff_link_hash_entry *, struct internal_syment *);
typedef struct
{
void (*_bfd_coff_swap_aux_in)

12
ld/ChangeLog
View File

@ -1,3 +1,15 @@
2015-07-03 Kai Tietz <ktietz@redhat.com>
PR ld/11539
* scripttempl/pep.sc: Mark .idata*, .CRT*, .tls*,
.rsrc*, .init, .ctor*, .dtor*, .fini, .jcr,
.eh_frame, .pdata. .xdata, and .gcc_except_table sections
as KEEP.
* scripttempl/pe.sc: Likewise.
* ld.texinfo: Document that --gc-sections has experimental support
for COFF and PE targets.
* NEWS: Mention experimental support.
2015-07-03 Alan Modra <amodra@gmail.com>
* Makefile.am (eelf32or1k.c, eelf32or1k_linux.c): Depend on ELF_DEPS.

3
ld/NEWS
View File

@ -1,5 +1,8 @@
-*- text -*-
* Experimental support for linker garbage collection (--gc-sections)
has been enabled for COFF and PE based targets.
* New command line option for ELF targets to compress DWARF debug
sections, --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi].

4
ld/ld.texinfo
View File

@ -1436,7 +1436,9 @@ it ends in a @code{.exe} suffix.
Enable garbage collection of unused input sections. It is ignored on
targets that do not support this option. The default behaviour (of not
performing this garbage collection) can be restored by specifying
@samp{--no-gc-sections} on the command line.
@samp{--no-gc-sections} on the command line. Note that garbage
collection for COFF and PE format targets is supported, but the
implementation is currently considered to be experimental.
@samp{--gc-sections} decides which input sections are used by
examining symbols and relocations. The section containing the entry

44
ld/scripttempl/pe.sc
View File

@ -30,29 +30,29 @@ if test "${RELOCATING}"; then
*(SORT(.rdata$*))'
fi
R_IDATA234='
SORT(*)(.idata$2)
SORT(*)(.idata$3)
KEEP (SORT(*)(.idata$2))
KEEP (SORT(*)(.idata$3))
/* These zeroes mark the end of the import list. */
LONG (0); LONG (0); LONG (0); LONG (0); LONG (0);
SORT(*)(.idata$4)'
R_IDATA5='SORT(*)(.idata$5)'
KEEP (SORT(*)(.idata$4))'
R_IDATA5='KEEP (SORT(*)(.idata$5))'
R_IDATA67='
SORT(*)(.idata$6)
SORT(*)(.idata$7)'
R_CRT_XC='*(SORT(.CRT$XC*)) /* C initialization */'
R_CRT_XI='*(SORT(.CRT$XI*)) /* C++ initialization */'
R_CRT_XL='*(SORT(.CRT$XL*)) /* TLS callbacks */'
R_CRT_XP='*(SORT(.CRT$XP*)) /* Pre-termination */'
R_CRT_XT='*(SORT(.CRT$XT*)) /* Termination */'
KEEP (SORT(*)(.idata$6))
KEEP (SORT(*)(.idata$7))'
R_CRT_XC='KEEP (*(SORT(.CRT$XC*))) /* C initialization */'
R_CRT_XI='KEEP (*(SORT(.CRT$XI*))) /* C++ initialization */'
R_CRT_XL='KEEP (*(SORT(.CRT$XL*))) /* TLS callbacks */'
R_CRT_XP='KEEP (*(SORT(.CRT$XP*))) /* Pre-termination */'
R_CRT_XT='KEEP (*(SORT(.CRT$XT*))) /* Termination */'
R_TLS='
*(.tls$AAA)
*(.tls)
*(.tls$)
*(SORT(.tls$*))
*(.tls$ZZZ)'
KEEP (*(.tls$AAA))
KEEP (*(.tls))
KEEP (*(.tls$))
KEEP (*(SORT(.tls$*)))
KEEP (*(.tls$ZZZ))'
R_RSRC='
*(.rsrc)
*(.rsrc$*)'
KEEP (*(.rsrc))
KEEP (*(.rsrc$*))'
else
R_TEXT=
R_DATA=
@ -85,7 +85,7 @@ SECTIONS
${RELOCATING+. = ALIGN(__section_alignment__);}
.text ${RELOCATING+ __image_base__ + ( __section_alignment__ < ${TARGET_PAGE_SIZE} ? . : __section_alignment__ )} :
{
${RELOCATING+ *(.init)}
${RELOCATING+ KEEP(*(.init))}
*(.text)
${R_TEXT}
${RELOCATING+ *(.text.*)}
@ -116,7 +116,7 @@ SECTIONS
*(.data)
*(.data2)
${R_DATA}
*(.jcr)
KEEP(*(.jcr))
${RELOCATING+__data_end__ = . ;}
${RELOCATING+*(.data_cygwin_nocopy)}
}
@ -136,12 +136,12 @@ SECTIONS
.eh_frame ${RELOCATING+BLOCK(__section_alignment__)} :
{
*(.eh_frame*)
KEEP(*(.eh_frame*))
}
.pdata ${RELOCATING+BLOCK(__section_alignment__)} :
{
*(.pdata)
KEEP(*(.pdata))
}
.bss ${RELOCATING+BLOCK(__section_alignment__)} :

60
ld/scripttempl/pep.sc
View File

@ -30,29 +30,29 @@ if test "${RELOCATING}"; then
*(SORT(.rdata$*))'
fi
R_IDATA234='
SORT(*)(.idata$2)
SORT(*)(.idata$3)
KEEP (SORT(*)(.idata$2))
KEEP (SORT(*)(.idata$3))
/* These zeroes mark the end of the import list. */
LONG (0); LONG (0); LONG (0); LONG (0); LONG (0);
SORT(*)(.idata$4)'
KEEP (SORT(*)(.idata$4))'
R_IDATA5='SORT(*)(.idata$5)'
R_IDATA67='
SORT(*)(.idata$6)
SORT(*)(.idata$7)'
R_CRT_XC='*(SORT(.CRT$XC*)) /* C initialization */'
R_CRT_XI='*(SORT(.CRT$XI*)) /* C++ initialization */'
R_CRT_XL='*(SORT(.CRT$XL*)) /* TLS callbacks */'
R_CRT_XP='*(SORT(.CRT$XP*)) /* Pre-termination */'
R_CRT_XT='*(SORT(.CRT$XT*)) /* Termination */'
KEEP (SORT(*)(.idata$6))
KEEP (SORT(*)(.idata$7))'
R_CRT_XC='KEEP (*(SORT(.CRT$XC*))) /* C initialization */'
R_CRT_XI='KEEP (*(SORT(.CRT$XI*))) /* C++ initialization */'
R_CRT_XL='KEEP (*(SORT(.CRT$XL*))) /* TLS callbacks */'
R_CRT_XP='KEEP (*(SORT(.CRT$XP*))) /* Pre-termination */'
R_CRT_XT='KEEP (*(SORT(.CRT$XT*))) /* Termination */'
R_TLS='
*(.tls$AAA)
*(.tls)
*(.tls$)
*(SORT(.tls$*))
*(.tls$ZZZ)'
KEEP (*(.tls$AAA))
KEEP (*(.tls))
KEEP (*(.tls$))
KEEP (*(SORT(.tls$*)))
KEEP (*(.tls$ZZZ))'
R_RSRC='
*(.rsrc)
*(.rsrc$*)'
KEEP (*(.rsrc))
KEEP (*(.rsrc$*))'
else
R_TEXT=
R_DATA=
@ -85,7 +85,7 @@ SECTIONS
${RELOCATING+. = ALIGN(__section_alignment__);}
.text ${RELOCATING+ __image_base__ + ( __section_alignment__ < ${TARGET_PAGE_SIZE} ? . : __section_alignment__ )} :
{
${RELOCATING+ *(.init)}
${RELOCATING+ KEEP(*(.init))}
*(.text)
${R_TEXT}
${RELOCATING+ *(.text.*)}
@ -94,14 +94,22 @@ SECTIONS
*(.glue_7)
${CONSTRUCTING+. = ALIGN(8);}
${CONSTRUCTING+ ___CTOR_LIST__ = .; __CTOR_LIST__ = . ;
LONG (-1); LONG (-1);*(.ctors); *(.ctor); *(SORT(.ctors.*)); LONG (0); LONG (0); }
LONG (-1); LONG (-1);
KEEP (*(.ctors));
KEEP (*(.ctor));
KEEP (*(SORT(.ctors.*)));
LONG (0); LONG (0); }
${CONSTRUCTING+ ___DTOR_LIST__ = .; __DTOR_LIST__ = . ;
LONG (-1); LONG (-1); *(.dtors); *(.dtor); *(SORT(.dtors.*)); LONG (0); LONG (0); }
${RELOCATING+ *(.fini)}
LONG (-1); LONG (-1);
KEEP (*(.dtors));
KEEP (*(.dtor));
KEEP (*(SORT(.dtors.*)));
LONG (0); LONG (0); }
${RELOCATING+ KEEP (*(.fini))}
/* ??? Why is .gcc_exc here? */
${RELOCATING+ *(.gcc_exc)}
${RELOCATING+PROVIDE (etext = .);}
${RELOCATING+ *(.gcc_except_table)}
${RELOCATING+ KEEP (*(.gcc_except_table))}
}
/* The Cygwin32 library uses a section to avoid copying certain data
@ -116,7 +124,7 @@ SECTIONS
*(.data)
*(.data2)
${R_DATA}
*(.jcr)
KEEP(*(.jcr))
${RELOCATING+__data_end__ = . ;}
${RELOCATING+*(.data_cygwin_nocopy)}
}
@ -136,17 +144,17 @@ SECTIONS
.eh_frame ${RELOCATING+BLOCK(__section_alignment__)} :
{
*(.eh_frame*)
KEEP (*(.eh_frame*))
}
.pdata ${RELOCATING+BLOCK(__section_alignment__)} :
{
*(.pdata*)
KEEP(*(.pdata*))
}
.xdata ${RELOCATING+BLOCK(__section_alignment__)} :
{
*(.xdata*)
KEEP(*(.xdata*))
}
.bss ${RELOCATING+BLOCK(__section_alignment__)} :

7
ld/testsuite/ChangeLog
View File

@ -1,3 +1,10 @@
2015-07-03 Kai Tietz <ktietz@redhat.com>
Nick Clifton <nickc@redhat.com>
PR ld/11539
* lib/ld-lib.exp (check_gc_sections_available): Do not
automatically fail for cygwin and mingw targets.
2015-07-01 Sandra Loosemore <sandra@codesourcery.com>
Cesar Philippidis <cesar@codesourcery.com>

4
ld/testsuite/lib/ld-lib.exp
View File

@ -1610,9 +1610,7 @@ proc check_gc_sections_available { } {
|| [istarget i860-*-*]
|| [istarget ia64-*-*]
|| [istarget mep-*-*]
|| [istarget mn10200-*-*]
|| [istarget *-*-cygwin]
|| [istarget *-*-mingw*] } {
|| [istarget mn10200-*-*] } {
set gc_sections_available_saved 0
return 0
}