From e5a48eeb789ec271f0579db787d9fa947cc7c83c Mon Sep 17 00:00:00 2001 From: Tiezhu Yang Date: Fri, 22 Nov 2024 15:47:43 +0800 Subject: [PATCH] objtool: Handle PC relative relocation type When compiling with Clang on LoongArch, there exists 32 bit PC relative relocation type, it needs to get the offset with "S + A - PC" according to the spec of "ELF for the LoongArch Architecture". This is preparation for later patch on LoongArch, there is no effect for the other archs with this patch. Link: https://github.com/loongson/la-abi-specs/blob/release/laelf.adoc Signed-off-by: Tiezhu Yang Signed-off-by: Huacai Chen Signed-off-by: michael Signed-off-by: maoxiaochuan --- tools/objtool/check.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 19d1263e6..8733ca620 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -2126,6 +2126,11 @@ static int add_jump_table(struct objtool_file *file, struct instruction *insn, if (reloc->sym->type == STT_SECTION) { /* Addend field in the relocation entry associated with the symbol */ offset = reloc_addend(reloc); + /* Handle the special cases compiled with Clang on LoongArch */ + if (file->elf->ehdr.e_machine == EM_LOONGARCH && + reloc_type(reloc) == R_LARCH_32_PCREL) + offset = reloc->sym->offset + reloc_addend(reloc) - + (reloc_offset(reloc) - reloc_offset(table)); } else { /* The address of the symbol in the relocation entry */ offset = reloc->sym->offset;