[RFC PATCH v2 07/13] objtool: arm64: Decode other system instructions

[Julien Thierry]

Decode ERET, BRK and NOPs

Signed-off-by: Julien Thierry <jthierry at redhat.com>
---
 tools/objtool/arch/arm64/decode.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/objtool/arch/arm64/decode.c b/tools/objtool/arch/arm64/decode.c
index 983f16b8b2af..3008dcbb5e64 100644
--- a/tools/objtool/arch/arm64/decode.c
+++ b/tools/objtool/arch/arm64/decode.c
@@ -233,6 +233,13 @@ int arch_decode_instruction(const struct elf *elf, 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_steppable_hint(insn)) {
+			*type = INSN_NOP;
+		} else if (aarch64_insn_is_brk(insn)) {
+			*immediate = aarch64_insn_decode_immediate(AARCH64_INSN_IMM_16, insn);
+			*type = INSN_BUG;
 		} else {
 			*type = INSN_OTHER;
 		}
-- 
2.25.4