[RFC PATCH 07/17] objtool: arm64: Decode other system instructions
From: Julien Thierry <hidden>
Date: 2021-01-20 18:56:44
Also in:
linux-efi, linux-hardening, lkml
Subsystem:
objtool, the rest · Maintainers:
Josh Poimboeuf, Peter Zijlstra, Linus Torvalds
Decode ERET, BRK and NOPs Signed-off-by: Julien Thierry <redacted> --- 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 924121b4b466..a4a587c400a1 100644
--- a/tools/objtool/arch/arm64/decode.c
+++ b/tools/objtool/arch/arm64/decode.c@@ -223,6 +223,13 @@ 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
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