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| author | H.J. Lu <hjl.tools@gmail.com> | 2010-01-08 01:43:23 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2010-01-08 01:43:23 +0000 |
| commit | bde6f3eb6dff94cea1d471e15c6154d55d49820f (patch) | |
| tree | 33ff2b586001fc671d83306de7968fdaab523c67 /bfd | |
| parent | b903363e43c8ea7d9b37b599bc15591036d03690 (diff) | |
| download | gdb-bde6f3eb6dff94cea1d471e15c6154d55d49820f.zip gdb-bde6f3eb6dff94cea1d471e15c6154d55d49820f.tar.gz gdb-bde6f3eb6dff94cea1d471e15c6154d55d49820f.tar.bz2 | |
Set SEC_KEEP on section XXX for undefined __start_XXX/__stop_XXX
bfd/
2010-01-07 H.J. Lu <hongjiu.lu@intel.com>
PR ld/11133
* elflink.c (_bfd_elf_gc_mark_hook): Check section XXX for
undefined __start_XXX/__stop_XXX in all input files and set
SEC_KEEP.
ld/testsuite/
2010-01-07 H.J. Lu <hongjiu.lu@intel.com>
PR ld/11133
* ld-gc/gc.exp: Run start.
* ld-gc/start.d: New.
* ld-gc/start.s: Likewise.
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/ChangeLog | 7 | ||||
| -rw-r--r-- | bfd/elflink.c | 29 |
2 files changed, 36 insertions, 0 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 01950b4..0f2e0e4 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,12 @@ 2010-01-07 H.J. Lu <hongjiu.lu@intel.com> + PR ld/11133 + * elflink.c (_bfd_elf_gc_mark_hook): Check section XXX for + undefined __start_XXX/__stop_XXX in all input files and set + SEC_KEEP. + +2010-01-07 H.J. Lu <hongjiu.lu@intel.com> + PR ld/11143 * elflink.c (elf_gc_sweep): Keep SHT_NOTE section. diff --git a/bfd/elflink.c b/bfd/elflink.c index 284bff1..f9f804d 100644 --- a/bfd/elflink.c +++ b/bfd/elflink.c @@ -11331,6 +11331,8 @@ _bfd_elf_gc_mark_hook (asection *sec, struct elf_link_hash_entry *h, Elf_Internal_Sym *sym) { + const char *sec_name; + if (h != NULL) { switch (h->root.type) @@ -11342,6 +11344,33 @@ _bfd_elf_gc_mark_hook (asection *sec, case bfd_link_hash_common: return h->root.u.c.p->section; + case bfd_link_hash_undefined: + case bfd_link_hash_undefweak: + /* To work around a glibc bug, keep all XXX input sections + when there is an as yet undefined reference to __start_XXX + or __stop_XXX symbols. The linker will later define such + symbols for orphan input sections that have a name + representable as a C identifier. */ + if (strncmp (h->root.root.string, "__start_", 8) == 0) + sec_name = h->root.root.string + 8; + else if (strncmp (h->root.root.string, "__stop_", 7) == 0) + sec_name = h->root.root.string + 7; + else + sec_name = NULL; + + if (sec_name && *sec_name != '\0') + { + bfd *i; + + for (i = info->input_bfds; i; i = i->link_next) + { + sec = bfd_get_section_by_name (i, sec_name); + if (sec) + sec->flags |= SEC_KEEP; + } + } + break; + default: break; } |