[PATCH v5 05/33] objtool: arm64: Decode other system instructions

[Chen Zhongjin]

Decode ERET, BRK and NOPs

Signed-off-by: Julien Thierry <jthierry@xxxxxxxxxx>
Signed-off-by: Chen Zhongjin <chenzhongjin@xxxxxxxxxx>
---
 tools/objtool/arch/arm64/decode.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/objtool/arch/arm64/decode.c b/tools/objtool/arch/arm64/decode.c
index 40ada17d0842..19840862f3aa 100644
--- a/tools/objtool/arch/arm64/decode.c
+++ b/tools/objtool/arch/arm64/decode.c
@@ -231,6 +231,14 @@ int arch_decode_instruction(struct objtool_file *file, const struct section *sec
 			/* Remaining branch opcodes are conditional */
 			*type = INSN_JUMP_CONDITIONAL;
 			*immediate = aarch64_get_branch_offset(insn);
+		} else if (aarch64_insn_is_eret(insn)) {
+			*type = INSN_CONTEXT_SWITCH;
+		} else if (aarch64_insn_is_hint(insn) ||
+				   aarch64_insn_is_barrier(insn)) {
+			*type = INSN_NOP;
+		} else if (aarch64_insn_is_brk(insn)) {
+			*type = INSN_BUG;
+			*immediate = aarch64_insn_decode_immediate(AARCH64_INSN_IMM_16, insn);
 		}
 		break;
 	default:
-- 
2.17.1