diff options
Diffstat (limited to 'tools/objtool/arch')
| -rw-r--r-- | tools/objtool/arch/x86/decode.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c index 3435a32afbd1..340a3dce94a0 100644 --- a/tools/objtool/arch/x86/decode.c +++ b/tools/objtool/arch/x86/decode.c @@ -659,6 +659,26 @@ const char *arch_nop_insn(int len) return nops[len-1]; } +#define BYTE_RET 0xC3 + +const char *arch_ret_insn(int len) +{ + static const char ret[5][5] = { + { BYTE_RET }, + { BYTE_RET, BYTES_NOP1 }, + { BYTE_RET, BYTES_NOP2 }, + { BYTE_RET, BYTES_NOP3 }, + { BYTE_RET, BYTES_NOP4 }, + }; + + if (len < 1 || len > 5) { + WARN("invalid RET size: %d\n", len); + return NULL; + } + + return ret[len-1]; +} + /* asm/alternative.h ? */ #define ALTINSTR_FLAG_INV (1 << 15) |