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| author | Jan Kratochvil <jan.kratochvil@redhat.com> | 2008-09-17 07:50:29 +0000 |
|---|---|---|
| committer | Jan Kratochvil <jan.kratochvil@redhat.com> | 2008-09-17 07:50:29 +0000 |
| commit | 2a7b2e88e38cbd83225e9c3b28a990de56dccef7 (patch) | |
| tree | 5a8ae06b9f452694184c05f9b9576ccc36c6266a /bfd | |
| parent | 32649b97b910a25743777a9ef0c7ba2a0bae3e35 (diff) | |
| download | gdb-2a7b2e88e38cbd83225e9c3b28a990de56dccef7.zip gdb-2a7b2e88e38cbd83225e9c3b28a990de56dccef7.tar.gz gdb-2a7b2e88e38cbd83225e9c3b28a990de56dccef7.tar.bz2 | |
bfd/
PR 6893 - Do not consider FDEs for discarded sections as invalid.
* elf-eh-frame.c (_bfd_elf_parse_eh_frame): New REQUIRE_CLEARED_RELOCS.
Consider FDEs with cleared relocations as valid and ignorable.
ld/testsuite/
* ld-elf/eh-group.exp, ld-elf/eh-group1.s, ld-elf/eh-group2.s: New test.
binutils/
Suppress warnings on NONE relocations to discarded sections.
* readelf.c (is_none_reloc): New function.
(debug_apply_relocations): Ignore is_none_reloc() relocations.
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/ChangeLog | 6 | ||||
| -rw-r--r-- | bfd/elf-eh-frame.c | 33 |
2 files changed, 35 insertions, 4 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 705c6f7..97c46de 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,9 @@ +2008-09-17 Jan Kratochvil <jan.kratochvil@redhat.com> + + PR 6893 - Do not consider FDEs for discarded sections as invalid. + * elf-eh-frame.c (_bfd_elf_parse_eh_frame): New REQUIRE_CLEARED_RELOCS. + Consider FDEs with cleared relocations as valid and ignorable. + 2008-09-16 H.J. Lu <hongjiu.lu@intel.com> PR ld/6877 diff --git a/bfd/elf-eh-frame.c b/bfd/elf-eh-frame.c index 7151a39..579a6b8 100644 --- a/bfd/elf-eh-frame.c +++ b/bfd/elf-eh-frame.c @@ -549,6 +549,16 @@ _bfd_elf_parse_eh_frame (bfd *abfd, struct bfd_link_info *info, < (bfd_size_type) ((buf) - ehbuf))) \ cookie->rel++ +#define REQUIRE_CLEARED_RELOCS(buf) \ + while (cookie->rel < cookie->relend \ + && (cookie->rel->r_offset \ + < (bfd_size_type) ((buf) - ehbuf))) \ + { \ + REQUIRE (cookie->rel->r_info == 0); \ + REQUIRE (cookie->rel->r_addend == 0); \ + cookie->rel++; \ + } + #define GET_RELOC(buf) \ ((cookie->rel < cookie->relend \ && (cookie->rel->r_offset \ @@ -766,9 +776,14 @@ _bfd_elf_parse_eh_frame (bfd *abfd, struct bfd_link_info *info, /* Chain together the FDEs for each section. */ rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie); - REQUIRE (rsec && rsec->owner == abfd); - this_inf->u.fde.next_for_section = elf_fde_list (rsec); - elf_fde_list (rsec) = this_inf; + /* RSEC will be NULL if FDE was cleared out as it was belonging to + a discarded SHT_GROUP. */ + if (rsec) + { + REQUIRE (rsec->owner == abfd); + this_inf->u.fde.next_for_section = elf_fde_list (rsec); + elf_fde_list (rsec) = this_inf; + } /* Skip the initial location and address range. */ start = buf; @@ -801,7 +816,17 @@ _bfd_elf_parse_eh_frame (bfd *abfd, struct bfd_link_info *info, insns = buf; buf = last_fde + 4 + hdr_length; - SKIP_RELOCS (buf); + + /* Cleared FDE? The instructions will not be cleared but verify all + the relocation entries for them are cleared. */ + if (rsec == NULL) + { + REQUIRE_CLEARED_RELOCS (buf); + } + else + { + SKIP_RELOCS (buf); + } } /* Try to interpret the CFA instructions and find the first |