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Subject[tip:perf/core] x86/tools: Add decoded instruction dump mode
Commit-ID:  9dde9dc0a81c7aeb863b35121d09011f09b4897c
Gitweb: http://git.kernel.org/tip/9dde9dc0a81c7aeb863b35121d09011f09b4897c
Author: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
AuthorDate: Mon, 5 Dec 2011 21:06:03 +0900
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Mon, 5 Dec 2011 14:53:23 +0100

x86/tools: Add decoded instruction dump mode

Add instruction dump mode to insn_sanity tool for
checking decoder really decoded instructions.

This mode is enabled when passing double -v (-vv) to
insn_sanity. It is useful for who wants to check whether
the decoder can decode some instructions correctly.
e.g.
$ echo 0f 73 10 11 | ./insn_sanity -y -vv -i -
Instruction = {
.prefixes = {
.value = 0, bytes[] = {0, 0, 0, 0},
.got = 1, .nbytes = 0},
.rex_prefix = {
.value = 0, bytes[] = {0, 0, 0, 0},
.got = 1, .nbytes = 0},
.vex_prefix = {
.value = 0, bytes[] = {0, 0, 0, 0},
.got = 1, .nbytes = 0},
.opcode = {
.value = 29455, bytes[] = {f, 73, 0, 0},
.got = 1, .nbytes = 2},
.modrm = {
.value = 16, bytes[] = {10, 0, 0, 0},
.got = 1, .nbytes = 1},
.sib = {
.value = 0, bytes[] = {0, 0, 0, 0},
.got = 1, .nbytes = 0},
.displacement = {
.value = 0, bytes[] = {0, 0, 0, 0},
.got = 1, .nbytes = 0},
.immediate1 = {
.value = 17, bytes[] = {11, 0, 0, 0},
.got = 1, .nbytes = 1},
.immediate2 = {
.value = 0, bytes[] = {0, 0, 0, 0},
.got = 0, .nbytes = 0},
.attr = 44800, .opnd_bytes = 4, .addr_bytes = 8,
.length = 4, .x86_64 = 1, .kaddr = 0x7fff0f7d9430}
Success: decoded and checked 1 given instructions with 0 errors (seed:0x0)
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20111205120603.15475.91192.stgit@cloud
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/tools/insn_sanity.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/x86/tools/insn_sanity.c b/arch/x86/tools/insn_sanity.c
index b6720d6..cc2f8c1 100644
--- a/arch/x86/tools/insn_sanity.c
+++ b/arch/x86/tools/insn_sanity.c
@@ -59,7 +59,7 @@ static void usage(const char *err)
fprintf(stderr, "Usage: %s [-y|-n|-v] [-s seed[,no]] [-m max] [-i input]\n", prog);
fprintf(stderr, "\t-y 64bit mode\n");
fprintf(stderr, "\t-n 32bit mode\n");
- fprintf(stderr, "\t-v Verbose mode\n");
+ fprintf(stderr, "\t-v Verbosity(-vv dumps any decoded result)\n");
fprintf(stderr, "\t-s Give a random seed (and iteration number)\n");
fprintf(stderr, "\t-m Give a maximum iteration number\n");
fprintf(stderr, "\t-i Give an input file with decoded binary\n");
@@ -188,7 +188,7 @@ static void parse_args(int argc, char **argv)
x86_64 = 0;
break;
case 'v':
- verbose = 1;
+ verbose++;
break;
case 'i':
if (strcmp("-", optarg) == 0)
@@ -264,7 +264,8 @@ int main(int argc, char **argv)
errors++;
} else if (verbose && !insn_complete(&insn))
dump_stream(stdout, "Info: Found an undecodable input", i, insn_buf, &insn);
-
+ else if (verbose >= 2)
+ dump_insn(stdout, &insn);
insns++;
}


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