+2005-10-15 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR ld/1467
+ * elf-bfd.h (_bfd_elf_match_sections_by_type): New.
+ (_bfd_generic_match_sections_by_type): New. Defined.
+
+ * elf.c (_bfd_elf_match_sections_by_type): New.
+
+ * libbfd-in.h (_bfd_generic_match_sections_by_type): New.
+
+ * bfd-in2.h: Regenerated.
+ * libbfd.h: Likewise.
+
+ * libbfd.c (_bfd_generic_match_sections_by_type): New.
+
+ * targets.c (BFD_JUMP_TABLE_LINK): Initialize
+ _bfd_match_sections_by_type with
+ _bfd_generic_match_sections_by_type.
+ (bfd_target): Add _bfd_match_sections_by_type.
+
2005-10-08 Paul Brook <paul@codesourcery.com>
* elf32-arm.c: Move #include "elf/arm.h" after libbfd.h.
NAME##_bfd_link_split_section, \
NAME##_bfd_gc_sections, \
NAME##_bfd_merge_sections, \
+ _bfd_generic_match_sections_by_type, \
NAME##_bfd_is_group_section, \
NAME##_bfd_discard_group, \
NAME##_section_already_linked \
/* Attempt to merge SEC_MERGE sections. */
bfd_boolean (*_bfd_merge_sections) (bfd *, struct bfd_link_info *);
+#define bfd_match_sections_by_type(abfd, asec, bbfd, bsec) \
+ BFD_SEND (abfd, _bfd_match_sections_by_type, (abfd, asec, bbfd, bsec))
+ /* Return TRUE if 2 section types are compatible. */
+ bfd_boolean (*_bfd_match_sections_by_type)
+ (bfd *, const asection *, bfd *, const asection *);
+
/* Is this section a member of a group? */
bfd_boolean (*_bfd_is_group_section) (bfd *, const struct bfd_section *);
(bfd *, bfd_boolean);
extern bfd_boolean _bfd_elf_merge_sections
(bfd *, struct bfd_link_info *);
+extern bfd_boolean _bfd_elf_match_sections_by_type
+ (bfd *, const asection *, bfd *, const asection *);
+#define _bfd_generic_match_sections_by_type \
+ _bfd_elf_match_sections_by_type
extern bfd_boolean bfd_elf_is_group_section
(bfd *, const struct bfd_section *);
extern void _bfd_elf_section_already_linked
= BFD_FAKE_SECTION (_bfd_elf_large_com_section,
SEC_IS_COMMON, NULL, NULL, "LARGE_COMMON",
0);
+
+/* Return TRUE if 2 section types are compatible. */
+
+bfd_boolean
+_bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec,
+ bfd *bbfd, const asection *bsec)
+{
+ if (asec == NULL
+ || bsec == NULL
+ || abfd->xvec->flavour != bfd_target_elf_flavour
+ || bbfd->xvec->flavour != bfd_target_elf_flavour)
+ return TRUE;
+
+ return elf_section_type (asec) == elf_section_type (bsec);
+}
((bfd_boolean (*) (bfd *, struct bfd_section *)) bfd_false)
#define _bfd_nolink_section_already_linked \
((void (*) (bfd *, struct bfd_section *)) bfd_void)
+extern bfd_boolean _bfd_generic_match_sections_by_type
+ (bfd *, const asection *, bfd *, const asection *);
/* Routines to use for BFD_JUMP_TABLE_DYNAMIC for targets which do not
have dynamic symbols or relocs. Use BFD_JUMP_TABLE_DYNAMIC
{
return FALSE;
}
+
+bfd_boolean
+_bfd_generic_match_sections_by_type (bfd *abfd ATTRIBUTE_UNUSED,
+ const asection *asec ATTRIBUTE_UNUSED,
+ bfd *bbfd ATTRIBUTE_UNUSED,
+ const asection *bsec ATTRIBUTE_UNUSED)
+{
+ return TRUE;
+}
((bfd_boolean (*) (bfd *, struct bfd_section *)) bfd_false)
#define _bfd_nolink_section_already_linked \
((void (*) (bfd *, struct bfd_section *)) bfd_void)
+extern bfd_boolean _bfd_generic_match_sections_by_type
+ (bfd *, const asection *, bfd *, const asection *);
/* Routines to use for BFD_JUMP_TABLE_DYNAMIC for targets which do not
have dynamic symbols or relocs. Use BFD_JUMP_TABLE_DYNAMIC
. NAME##_bfd_link_split_section, \
. NAME##_bfd_gc_sections, \
. NAME##_bfd_merge_sections, \
+. _bfd_generic_match_sections_by_type, \
. NAME##_bfd_is_group_section, \
. NAME##_bfd_discard_group, \
. NAME##_section_already_linked \
. {* Attempt to merge SEC_MERGE sections. *}
. bfd_boolean (*_bfd_merge_sections) (bfd *, struct bfd_link_info *);
.
+.#define bfd_match_sections_by_type(abfd, asec, bbfd, bsec) \
+. BFD_SEND (abfd, _bfd_match_sections_by_type, (abfd, asec, bbfd, bsec))
+. {* Return TRUE if 2 section types are compatible. *}
+. bfd_boolean (*_bfd_match_sections_by_type)
+. (bfd *, const asection *, bfd *, const asection *);
+.
. {* Is this section a member of a group? *}
. bfd_boolean (*_bfd_is_group_section) (bfd *, const struct bfd_section *);
.
+2005-10-15 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR ld/1467
+ * emultempl/elf32.em: Include "elf-bfd.h".
+ (gld${EMULATION_NAME}_place_orphan): Check section type and
+ don't use section name for ELF input sections.
+
+ * ld.texinfo: Document orphan section processing.
+
+ * ldlang.c (lang_output_section_find_by_flags): Match section
+ types by calling bfd_match_sections_by_type.
+
2005-10-13 Mark Mitchell <mark@codesourcery.com>
* ld.texino: Describe double-quoted string syntax for version
#include "ldemul.h"
#include <ldgram.h>
#include "elf/common.h"
+#include "elf-bfd.h"
/* Declare functions used by various EXTRA_EM_FILEs. */
static void gld${EMULATION_NAME}_before_parse (void);
lang_output_section_statement_type *after;
lang_output_section_statement_type *os;
int isdyn = 0;
+ int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
+ unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
secname = bfd_get_section_name (s->owner, s);
if (! link_info.relocatable
&& link_info.combreloc
- && (s->flags & SEC_ALLOC)
- && strncmp (secname, ".rel", 4) == 0)
+ && (s->flags & SEC_ALLOC))
{
- if (secname[4] == 'a')
- secname = ".rela.dyn";
- else
- secname = ".rel.dyn";
- isdyn = 1;
+ if (iself)
+ switch (sh_type)
+ {
+ case SHT_RELA:
+ secname = ".rela.dyn";
+ isdyn = 1;
+ break;
+ case SHT_REL:
+ secname = ".rel.dyn";
+ isdyn = 1;
+ break;
+ default:
+ break;
+ }
+ else if (strncmp (secname, ".rel", 4) == 0)
+ {
+ secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn";
+ isdyn = 1;
+ }
}
if (isdyn || (!config.unique_orphan_sections && !unique_section_p (s)))
if (os != NULL
&& (os->bfd_section == NULL
|| os->bfd_section->flags == 0
- || ((s->flags ^ os->bfd_section->flags)
- & (SEC_LOAD | SEC_ALLOC)) == 0))
+ || ((!iself
+ || sh_type == elf_section_type (os->bfd_section))
+ && ((s->flags ^ os->bfd_section->flags)
+ & (SEC_LOAD | SEC_ALLOC)) == 0)))
{
/* We already have an output section statement with this
name, and its bfd section, if any, has compatible flags.
if ((s->flags & SEC_ALLOC) == 0)
;
else if ((s->flags & SEC_LOAD) != 0
- && strncmp (secname, ".note", 5) == 0)
+ && ((iself && sh_type == SHT_NOTE)
+ || (!iself && strncmp (secname, ".note", 5) == 0)))
place = &hold[orphan_interp];
else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
place = &hold[orphan_bss];
place = &hold[orphan_sdata];
else if ((s->flags & SEC_READONLY) == 0)
place = &hold[orphan_data];
- else if (strncmp (secname, ".rel", 4) == 0
+ else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
+ || (!iself && strncmp (secname, ".rel", 4) == 0))
&& (s->flags & SEC_LOAD) != 0)
place = &hold[orphan_rel];
else if ((s->flags & SEC_CODE) == 0)
@menu
* Constants:: Constants
* Symbols:: Symbol Names
+* Orphan Sections:: Orphan Sections
* Location Counter:: The Location Counter
* Operators:: Operators
* Evaluation:: Evaluation
to delimit symbols with spaces. For example, @samp{A-B} is one symbol,
whereas @samp{A - B} is an expression involving subtraction.
+@node Orphan Sections
+@subsection Orphan Sections
+@cindex orphan
+Orphan sections are sections present in the input files which
+are not explicitly placed into the output file by the linker
+script. The linker will still copy these sections into the
+output file, but it has to guess as to where they should be
+placed. The linker uses a simple heuristic to do this. It
+attempts to place orphan sections after non-orphan sections of the
+same attribute, such as code vs data, loadable vs non-loadable, etc.
+If there is not enough room to do this then it places
+at the end of the file.
+
+For ELF targets, the attribute of the section includes section type as
+well as section flag.
+
@node Location Counter
@subsection The Location Counter
@kindex .
{
flags = look->flags;
if (look->bfd_section != NULL)
- flags = look->bfd_section->flags;
+ {
+ flags = look->bfd_section->flags;
+ if (!bfd_match_sections_by_type (output_bfd,
+ look->bfd_section,
+ sec->owner, sec))
+ continue;
+ }
flags ^= sec->flags;
if (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY
| SEC_CODE | SEC_SMALL_DATA | SEC_THREAD_LOCAL)))
{
flags = look->flags;
if (look->bfd_section != NULL)
- flags = look->bfd_section->flags;
+ {
+ flags = look->bfd_section->flags;
+ if (!bfd_match_sections_by_type (output_bfd,
+ look->bfd_section,
+ sec->owner, sec))
+ continue;
+ }
flags ^= sec->flags;
if (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
| SEC_CODE | SEC_SMALL_DATA | SEC_THREAD_LOCAL)))
{
flags = look->flags;
if (look->bfd_section != NULL)
- flags = look->bfd_section->flags;
+ {
+ flags = look->bfd_section->flags;
+ if (!bfd_match_sections_by_type (output_bfd,
+ look->bfd_section,
+ sec->owner, sec))
+ continue;
+ }
flags ^= sec->flags;
if (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
| SEC_READONLY))
{
flags = look->flags;
if (look->bfd_section != NULL)
- flags = look->bfd_section->flags;
+ {
+ flags = look->bfd_section->flags;
+ if (!bfd_match_sections_by_type (output_bfd,
+ look->bfd_section,
+ sec->owner, sec))
+ continue;
+ }
flags ^= sec->flags;
if (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
| SEC_THREAD_LOCAL))
{
flags = look->flags;
if (look->bfd_section != NULL)
- flags = look->bfd_section->flags;
+ {
+ flags = look->bfd_section->flags;
+ if (!bfd_match_sections_by_type (output_bfd,
+ look->bfd_section,
+ sec->owner, sec))
+ continue;
+ }
flags ^= sec->flags;
if (!(flags & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
| SEC_SMALL_DATA | SEC_THREAD_LOCAL)))
{
flags = look->flags;
if (look->bfd_section != NULL)
- flags = look->bfd_section->flags;
+ {
+ flags = look->bfd_section->flags;
+ if (!bfd_match_sections_by_type (output_bfd,
+ look->bfd_section,
+ sec->owner, sec))
+ continue;
+ }
flags ^= sec->flags;
if (!(flags & SEC_ALLOC))
found = look;
projects / binutils-gdb.git / commitdiff