The following commit has been merged into the objtool/core branch of tip: Commit-ID: 317664a7fcc99d9bcc0cb33ac05e27764f3024e4 Gitweb: https://git.kernel.org/tip/317664a7fcc99d9bcc0cb33ac05e27764f3024e4 Author: Martin Schwidefsky <schwidefsky@xxxxxxxxxx> AuthorDate: Sun, 04 Oct 2020 16:30:50 +02:00 Committer: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> CommitterDate: Tue, 06 Oct 2020 09:36:48 -05:00 objtool: Fix reloc generation on big endian cross compiles Currently relocations generated in elf_rebuild_rel_reloc_section/ elf_rebuild_rela_reloc_section functions are broken if the objtool is built and run on big endian system. E.g. the following errors pop up during x86 cross compilation: x86_64-9.1.0-ld: fs/efivarfs/inode.o: bad reloc symbol index (0x2000000 >= 0x22) for offset 0 in section `.orc_unwind_ip' x86_64-9.1.0-ld: final link failed: bad value To address that convert those functions to do things similar to elf_write_reloc(), reuse gelf_update_rel/gelf_update_rela libelf library functions. Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx> Co-developed-by: Vasily Gorbik <gor@xxxxxxxxxxxxx> Signed-off-by: Vasily Gorbik <gor@xxxxxxxxxxxxx> Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> --- tools/objtool/elf.c | 34 +++++++++++++++++++--------------- 1 file changed, 19 insertions(+), 15 deletions(-) diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c index 4e1d746..5c0341b 100644 --- a/tools/objtool/elf.c +++ b/tools/objtool/elf.c @@ -829,25 +829,27 @@ static int elf_rebuild_rel_reloc_section(struct section *sec, int nr) { struct reloc *reloc; int idx = 0, size; - GElf_Rel *relocs; + void *buf; /* Allocate a buffer for relocations */ - size = nr * sizeof(*relocs); - relocs = malloc(size); - if (!relocs) { + size = nr * sizeof(GElf_Rel); + buf = malloc(size); + if (!buf) { perror("malloc"); return -1; } - sec->data->d_buf = relocs; + sec->data->d_buf = buf; sec->data->d_size = size; + sec->data->d_type = ELF_T_REL; sec->sh.sh_size = size; idx = 0; list_for_each_entry(reloc, &sec->reloc_list, list) { - relocs[idx].r_offset = reloc->offset; - relocs[idx].r_info = GELF_R_INFO(reloc->sym->idx, reloc->type); + reloc->rel.r_offset = reloc->offset; + reloc->rel.r_info = GELF_R_INFO(reloc->sym->idx, reloc->type); + gelf_update_rel(sec->data, idx, &reloc->rel); idx++; } @@ -858,26 +860,28 @@ static int elf_rebuild_rela_reloc_section(struct section *sec, int nr) { struct reloc *reloc; int idx = 0, size; - GElf_Rela *relocs; + void *buf; /* Allocate a buffer for relocations with addends */ - size = nr * sizeof(*relocs); - relocs = malloc(size); - if (!relocs) { + size = nr * sizeof(GElf_Rela); + buf = malloc(size); + if (!buf) { perror("malloc"); return -1; } - sec->data->d_buf = relocs; + sec->data->d_buf = buf; sec->data->d_size = size; + sec->data->d_type = ELF_T_RELA; sec->sh.sh_size = size; idx = 0; list_for_each_entry(reloc, &sec->reloc_list, list) { - relocs[idx].r_offset = reloc->offset; - relocs[idx].r_addend = reloc->addend; - relocs[idx].r_info = GELF_R_INFO(reloc->sym->idx, reloc->type); + reloc->rela.r_offset = reloc->offset; + reloc->rela.r_addend = reloc->addend; + reloc->rela.r_info = GELF_R_INFO(reloc->sym->idx, reloc->type); + gelf_update_rela(sec->data, idx, &reloc->rela); idx++; }
![]() |