lkml.org 
[lkml]   [2011]   [Dec]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    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++;
    }


    \
     
     \ /
      Last update: 2011-12-05 18:47    [W:0.025 / U:61.452 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site