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| author | Daniel Jacobowitz <drow@false.org> | 2006-11-03 00:58:10 +0000 |
|---|---|---|
| committer | Daniel Jacobowitz <drow@false.org> | 2006-11-03 00:58:10 +0000 |
| commit | b1e24c0220fe6718066991999cb0a6e5b88b569d (patch) | |
| tree | 8e992658791fe21d5b70757192c7d8272d64f532 /bfd/reloc.c | |
| parent | 5c38167b2ce156772a524a97c9baa3bcb74c506c (diff) | |
| download | gdb-b1e24c0220fe6718066991999cb0a6e5b88b569d.zip gdb-b1e24c0220fe6718066991999cb0a6e5b88b569d.tar.gz gdb-b1e24c0220fe6718066991999cb0a6e5b88b569d.tar.bz2 | |
bfd/
* libbfd-in.h (_bfd_clear_contents): New prototype.
* reloc.c (_bfd_clear_contents): New.
* libbfd.h: Regenerated.
* elf32-arm.c (elf32_arm_final_link_relocate): Use
_bfd_clear_contents.
* elf32-d10v.c (elf32_d10v_relocate_section): Likewise.
* elf32-hppa.c (elf32_hppa_relocate_section): Likewise.
* elf32-i386.c (elf_i386_relocate_section): Likewise.
* elf32-ppc.c (ppc_elf_relocate_section): Likewise.
* elf32-s390.c (elf_s390_relocate_section): Likewise.
* elf32-sh.c (sh_elf_relocate_section): Likewise.
* elf32-xtensa.c (elf_xtensa_relocate_section): Likewise.
* elf64-ppc.c (ppc64_elf_relocate_section): Likewise.
* elf64-s390.c (elf_s390_relocate_section): Likewise.
* elf64-x86-64.c (elf64_x86_64_relocate_section): Likewise.
* elfxx-sparc.c (_bfd_sparc_elf_relocate_section): Likewise.
* elfxx-ia64.c (elfNN_ia64_relocate_section): Set value to
zero for discarded symbols.
* elfxx-mips.c (mips_elf_calculate_relocation): Likewise.
ld/testsuite/
* ld-discard/zero-rel.d, ld-discard/zero-rel.s: New files.
Diffstat (limited to 'bfd/reloc.c')
| -rw-r--r-- | bfd/reloc.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/bfd/reloc.c b/bfd/reloc.c index 09b888f..1b8c8d7 100644 --- a/bfd/reloc.c +++ b/bfd/reloc.c @@ -1544,6 +1544,72 @@ _bfd_relocate_contents (reloc_howto_type *howto, return flag; } +/* Clear a given location using a given howto, by applying a relocation value + of zero and discarding any in-place addend. This is used for fixed-up + relocations against discarded symbols, to make ignorable debug or unwind + information more obvious. */ + +void +_bfd_clear_contents (reloc_howto_type *howto, + bfd *input_bfd, + bfd_byte *location) +{ + int size; + bfd_vma x = 0; + + /* Get the value we are going to relocate. */ + size = bfd_get_reloc_size (howto); + switch (size) + { + default: + case 0: + abort (); + case 1: + x = bfd_get_8 (input_bfd, location); + break; + case 2: + x = bfd_get_16 (input_bfd, location); + break; + case 4: + x = bfd_get_32 (input_bfd, location); + break; + case 8: +#ifdef BFD64 + x = bfd_get_64 (input_bfd, location); +#else + abort (); +#endif + break; + } + + /* Zero out the unwanted bits of X. */ + x &= ~howto->dst_mask; + + /* Put the relocated value back in the object file. */ + switch (size) + { + default: + case 0: + abort (); + case 1: + bfd_put_8 (input_bfd, x, location); + break; + case 2: + bfd_put_16 (input_bfd, x, location); + break; + case 4: + bfd_put_32 (input_bfd, x, location); + break; + case 8: +#ifdef BFD64 + bfd_put_64 (input_bfd, x, location); +#else + abort (); +#endif + break; + } +} + /* DOCDD INODE |