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| author | H.J. Lu <hjl.tools@gmail.com> | 2010-04-30 18:27:32 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2010-04-30 18:27:32 +0000 |
| commit | 0672748ac053cc4f8159af0d21ca88ae8b3778e6 (patch) | |
| tree | 6ce1177f0a49e04ca388d25edc23db44dd3fd1b3 /bfd/elf-bfd.h | |
| parent | 705b5767b7302e9fdd64d2a2ec5942ff22975a98 (diff) | |
| download | gdb-0672748ac053cc4f8159af0d21ca88ae8b3778e6.zip gdb-0672748ac053cc4f8159af0d21ca88ae8b3778e6.tar.gz gdb-0672748ac053cc4f8159af0d21ca88ae8b3778e6.tar.bz2 | |
Remove relocation against discarded sections for relocatable link.
bfd/
2010-04-30 H.J. Lu <hongjiu.lu@intel.com>
PR ld/11542
* elf-bfd.h (RELOC_AGAINST_DISCARDED_SECTION): New.
* elf32-i386.c (elf_i386_relocate_section): Use it.
* elf64-x86-64.c (elf64_x86_64_relocate_section): Likewise.
ld/testsuite/
2010-04-30 H.J. Lu <hongjiu.lu@intel.com>
PR ld/11542
* ld-elf/discard.ld: New.
* ld-elf/discard1.d: Likewise.
* ld-elf/discard1.s: Likewise.
* ld-elf/discard2.d: Likewise.
* ld-elf/discard2.s: Likewise.
* ld-elf/discard3.d: Likewise.
Diffstat (limited to 'bfd/elf-bfd.h')
| -rw-r--r-- | bfd/elf-bfd.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index 0c975dc..226b95f 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -2328,6 +2328,48 @@ extern asection _bfd_elf_large_com_section; } \ while (0) +/* This macro is to avoid lots of duplicated code in the body of the + loop over relocations in xxx_relocate_section() in the various + elfxx-xxxx.c files. + + Handle relocations against symbols from removed linkonce sections, + or sections discarded by a linker script. When doing a relocatable + link, we remove such relocations. Otherwise, we just want the + section contents zeroed and avoid any special processing. */ +#define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \ + rel, relend, howto, contents) \ + { \ + if (info->relocatable \ + && (input_section->flags & SEC_DEBUGGING)) \ + { \ + /* Only remove relocations in debug sections since other \ + sections may require relocations. */ \ + Elf_Internal_Shdr *rel_hdr; \ + \ + rel_hdr = &elf_section_data (input_section->output_section)->rel_hdr; \ + \ + /* Avoid empty output section. */ \ + if (rel_hdr->sh_size > rel_hdr->sh_entsize) \ + { \ + rel_hdr->sh_size -= rel_hdr->sh_entsize; \ + rel_hdr = &elf_section_data (input_section)->rel_hdr; \ + rel_hdr->sh_size -= rel_hdr->sh_entsize; \ + \ + memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \ + \ + input_section->reloc_count--; \ + relend--; \ + rel--; \ + continue; \ + } \ + } \ + \ + _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); \ + rel->r_info = 0; \ + rel->r_addend = 0; \ + continue; \ + } + /* Will a symbol be bound to the the definition within the shared library, if any. A unique symbol can never be bound locally. */ #define SYMBOLIC_BIND(INFO, H) \ |