diff options
| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-07-08 13:49:15 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-07-08 13:49:15 -0300 |
| commit | facbf0b9820f34f14b54f567862b4a96e910f468 (patch) | |
| tree | ee65e875e4167dd903f2745cfbf6b2735fd1cd9e /tools/objtool/arch/x86/decode.c | |
| parent | perf symbols: Add s390 idle functions 'psw_idle' and 'psw_idle_exit' to list of idle symbols (diff) | |
| parent | Merge tag 'perf-tools-fixes-2020-07-07' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux (diff) | |
| download | linux-dev-facbf0b9820f34f14b54f567862b4a96e910f468.tar.xz linux-dev-facbf0b9820f34f14b54f567862b4a96e910f468.zip | |
Merge remote-tracking branch 'torvalds/master' into perf/core
To pick up fixes and move perf/core forward, minor conflict as
perf_evlist__add_dummy() lost its 'perf_' prefix as it operates on a
'struct evlist', not on a 'struct perf_evlist', i.e. its tools/perf/
specific, it is not in libperf.
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]; +} |