Based on get_alt_insn() in arch/arm64/kernel/alternative.c, arm64
alternative code adapts offsets for static branches and adrp
instructions.
Signed-off-by: Julien Thierry <jthierry@xxxxxxxxxx>
Signed-off-by: Chen Zhongjin <chenzhongjin@xxxxxxxxxx>
---
tools/objtool/arch/arm64/special.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/tools/objtool/arch/arm64/special.c b/tools/objtool/arch/arm64/special.c
index 45f283283091..a70b91e8bd7d 100644
--- a/tools/objtool/arch/arm64/special.c
+++ b/tools/objtool/arch/arm64/special.c
@@ -10,7 +10,11 @@ bool arch_support_alt_relocation(struct special_alt *special_alt,
struct instruction *insn,
struct reloc *reloc)
{
- return false;
+ u32 opcode = *(u32 *)(insn->sec->data->d_buf + insn->offset);
+
+ return aarch64_insn_is_branch_imm(opcode) ||
+ aarch64_insn_is_adrp(opcode) ||
+ !aarch64_insn_uses_literal(opcode);
}
--
2.17.1
