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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-07-03 08:05:59 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-07-03 08:05:59 -0300 |
| commit | 9434628fcee63b1f3c6a6881b70e8f69a1f68e88 (patch) | |
| tree | 255d093aeda6c125f0158e883eb2bf400bb7f737 /tools/objtool/arch/x86/decode.c | |
| parent | c42ad5d4358230be166fc36c87bae0dd1680c570 (diff) | |
| parent | cdd3bb54332f82295ed90cd0c09c78cd0c0ee822 (diff) | |
| download | linux-9434628fcee63b1f3c6a6881b70e8f69a1f68e88.tar.bz2 | |
Merge remote-tracking branch 'torvalds/master' into perf/urgent
To synchronize UAPI headers.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/objtool/arch/x86/decode.c')
| -rw-r--r-- | tools/objtool/arch/x86/decode.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c index 4b504fc90bbb..9872195f998b 100644 --- a/tools/objtool/arch/x86/decode.c +++ b/tools/objtool/arch/x86/decode.c @@ -565,3 +565,21 @@ void arch_initial_func_cfi_state(struct cfi_init_state *state) state->regs[16].base = CFI_CFA; state->regs[16].offset = -8; } + +const char *arch_nop_insn(int len) +{ + static const char nops[5][5] = { + /* 1 */ { 0x90 }, + /* 2 */ { 0x66, 0x90 }, + /* 3 */ { 0x0f, 0x1f, 0x00 }, + /* 4 */ { 0x0f, 0x1f, 0x40, 0x00 }, + /* 5 */ { 0x0f, 0x1f, 0x44, 0x00, 0x00 }, + }; + + if (len < 1 || len > 5) { + WARN("invalid NOP size: %d\n", len); + return NULL; + } + + return nops[len-1]; +} |