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GC: Also check the local debug definition section 

Extend

commit b7c871edcd
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed May 17 07:57:15 2017 -0700

    Mark debug sections referenced by kept debug sections

to handle the local debug definition section.

bfd/

	PR ld/20882
	* elflink.c (elf_gc_mark_debug_section): Also check the local
	debug definition section.

ld/

	PR ld/20882
	* testsuite/ld-gc/pr20882.d: Also dump and check .debug_abbrev
	section.
	* testsuite/ld-gc/pr20882b.s: Add .debug_abbrev section.
This commit is contained in:
H.J. Lu 2018-03-14 04:23:24 -07:00
parent bf48520113
commit 9e223787a4
5 changed files with 45 additions and 11 deletions
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6
bfd/ChangeLog
View File

@ -1,3 +1,9 @@
2018-03-14 H.J. Lu <hongjiu.lu@intel.com>
PR ld/20882
* elflink.c (elf_gc_mark_debug_section): Also check the local
debug definition section.
2018-03-13 Nick Clifton <nickc@redhat.com>
PR 22113

25
bfd/elflink.c
View File

@ -12802,20 +12802,31 @@ _bfd_elf_gc_mark_hook (asection *sec,
return NULL;
}
/* Return the global debug definition section. */
/* Return the debug definition section. */
static asection *
elf_gc_mark_debug_section (asection *sec ATTRIBUTE_UNUSED,
struct bfd_link_info *info ATTRIBUTE_UNUSED,
Elf_Internal_Rela *rel ATTRIBUTE_UNUSED,
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
Elf_Internal_Sym *sym)
{
if (h != NULL
&& (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
&& (h->root.u.def.section->flags & SEC_DEBUGGING) != 0)
return h->root.u.def.section;
if (h != NULL)
{
/* Return the global debug definition section. */
if ((h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
&& (h->root.u.def.section->flags & SEC_DEBUGGING) != 0)
return h->root.u.def.section;
}
else
{
/* Return the local debug definition section. */
asection *isec = bfd_section_from_elf_index (sec->owner,
sym->st_shndx);
if ((isec->flags & SEC_DEBUGGING) != 0)
return isec;
}
return NULL;
}

7
ld/ChangeLog
View File

@ -1,3 +1,10 @@
2018-03-14 H.J. Lu <hongjiu.lu@intel.com>
PR ld/20882
* testsuite/ld-gc/pr20882.d: Also dump and check .debug_abbrev
section.
* testsuite/ld-gc/pr20882b.s: Add .debug_abbrev section.
2018-03-14 H.J. Lu <hongjiu.lu@intel.com>
* testsuite/ld-gc/gc.exp: Fix a typo: $LFLAGS -> $LDFLAGS.

9
ld/testsuite/ld-gc/pr20882.d
View File

@ -3,7 +3,10 @@
#source: pr20882b.s
#source: pr20882c.s
#ld: --gc-sections -e main
#readelf: -x .debug_info
#readelf: -x .debug_info -x .debug_abbrev
#...
0x0+ (0a000000 00000000 |00000000 0000000a |06000000 |00000006 |0400|0004)28 .*
Hex dump of section '\.debug_info':
0x0+ .*
Hex dump of section '\.debug_abbrev':
0x0+ 61626364 +abcd

9
ld/testsuite/ld-gc/pr20882b.s
View File

@ -2,4 +2,11 @@
.hidden t.c.4903c230
.globl t.c.4903c230
t.c.4903c230:
.byte 0x28
.dc.a .Ldebug_abbrev0
.section .debug_abbrev,"",%progbits
.Ldebug_abbrev0:
.byte 0x61
.byte 0x62
.byte 0x63
.byte 0x64