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| author | Alan Modra <amodra@gmail.com> | 2017-12-08 11:40:31 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2017-12-09 08:06:08 +1030 |
| commit | a9d44aad42e127adadbad35f23931d8d83aa40c1 (patch) | |
| tree | 889dfcf6f885f90199aa37def2aaeb196ba51e7c /bfd/elfxx-sparc.c | |
| parent | 92469284a650232768523564f2c715c4ebb57906 (diff) | |
| download | gdb-a9d44aad42e127adadbad35f23931d8d83aa40c1.zip gdb-a9d44aad42e127adadbad35f23931d8d83aa40c1.tar.gz gdb-a9d44aad42e127adadbad35f23931d8d83aa40c1.tar.bz2 | |
Work around sparc glibc bug
* elfxx-sparc.c (_bfd_sparc_elf_relocate_section): When emitting
dynamic R_SPARC_RELATIVE for GOT entries, ensure the section
contents are zeroed.
Diffstat (limited to 'bfd/elfxx-sparc.c')
| -rw-r--r-- | bfd/elfxx-sparc.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/bfd/elfxx-sparc.c b/bfd/elfxx-sparc.c index adc9ed3..9885059 100644 --- a/bfd/elfxx-sparc.c +++ b/bfd/elfxx-sparc.c @@ -3212,10 +3212,6 @@ _bfd_sparc_elf_relocate_section (bfd *output_bfd, off &= ~1; else { - SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, - htab->elf.sgot->contents + off); - h->got.offset |= 1; - if (h->dynindx == -1 && !h->forced_local && h->root.type != bfd_link_hash_undefweak @@ -3225,6 +3221,10 @@ _bfd_sparc_elf_relocate_section (bfd *output_bfd, generate R_SPARC_RELATIVE here. */ relative_reloc = TRUE; } + else + SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, + htab->elf.sgot->contents + off); + h->got.offset |= 1; } } else @@ -3245,12 +3245,10 @@ _bfd_sparc_elf_relocate_section (bfd *output_bfd, else { if (bfd_link_pic (info)) - { - relative_reloc = TRUE; - } - - SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, - htab->elf.sgot->contents + off); + relative_reloc = TRUE; + else + SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, + htab->elf.sgot->contents + off); local_got_offsets[r_symndx] |= 1; } } @@ -3271,8 +3269,14 @@ _bfd_sparc_elf_relocate_section (bfd *output_bfd, outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, R_SPARC_RELATIVE); outrel.r_addend = relocation; - relocation = 0; sparc_elf_append_rela (output_bfd, s, &outrel); + /* Versions of glibc ld.so at least up to 2.26 wrongly + add the section contents to the value calculated for + a RELATIVE reloc. Zero the contents to work around + this bug. */ + relocation = 0; + SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, + htab->elf.sgot->contents + off); } relocation = htab->elf.sgot->output_offset + off - got_base; |