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x86: Add verbose option to insn decoder test

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Add verbose option to insn decoder test. This dumps decoded
instruction when building kernel with V=1.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
LKML-Reference: <20091116230618.5250.18762.stgit@harusame>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Masami Hiramatsu 2009-11-16 18:06:18 -05:00 committed by Ingo Molnar
parent 444a2a3bcd
commit d65ff75fbe
2 changed files with 71 additions and 12 deletions
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9
arch/x86/tools/Makefile
View File

@ -1,6 +1,13 @@
PHONY += posttest
ifeq ($(KBUILD_VERBOSE),1)
postest_verbose = -v
else
postest_verbose =
endif
quiet_cmd_posttest = TEST $@
cmd_posttest = $(OBJDUMP) -d -j .text $(objtree)/vmlinux | awk -f $(srctree)/arch/x86/tools/distill.awk | $(obj)/test_get_len $(CONFIG_64BIT)
cmd_posttest = $(OBJDUMP) -d -j .text $(objtree)/vmlinux | awk -f $(srctree)/arch/x86/tools/distill.awk | $(obj)/test_get_len -$(CONFIG_64BIT) $(posttest_verbose)
posttest: $(obj)/test_get_len vmlinux
$(call cmd,posttest)

74
arch/x86/tools/test_get_len.c
View File

@ -20,6 +20,7 @@
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>
#define unlikely(cond) (cond)
@ -36,11 +37,16 @@
*/
const char *prog;
static int verbose;
static int x86_64;
static void usage(void)
{
fprintf(stderr, "Usage: objdump -d a.out | awk -f distill.awk |"
" %s [y|n](64bit flag)\n", prog);
" %s [-y|-n] [-v] \n", prog);
fprintf(stderr, "\t-y 64bit mode\n");
fprintf(stderr, "\t-n 32bit mode\n");
fprintf(stderr, "\t-v verbose mode\n");
exit(1);
}
@ -50,6 +56,56 @@ static void malformed_line(const char *line, int line_nr)
exit(3);
}
static void dump_field(FILE *fp, const char *name, const char *indent,
struct insn_field *field)
{
fprintf(fp, "%s.%s = {\n", indent, name);
fprintf(fp, "%s\t.value = %d, bytes[] = {%x, %x, %x, %x},\n",
indent, field->value, field->bytes[0], field->bytes[1],
field->bytes[2], field->bytes[3]);
fprintf(fp, "%s\t.got = %d, .nbytes = %d},\n", indent,
field->got, field->nbytes);
}
static void dump_insn(FILE *fp, struct insn *insn)
{
fprintf(fp, "Instruction = { \n");
dump_field(fp, "prefixes", "\t", &insn->prefixes);
dump_field(fp, "rex_prefix", "\t", &insn->rex_prefix);
dump_field(fp, "vex_prefix", "\t", &insn->vex_prefix);
dump_field(fp, "opcode", "\t", &insn->opcode);
dump_field(fp, "modrm", "\t", &insn->modrm);
dump_field(fp, "sib", "\t", &insn->sib);
dump_field(fp, "displacement", "\t", &insn->displacement);
dump_field(fp, "immediate1", "\t", &insn->immediate1);
dump_field(fp, "immediate2", "\t", &insn->immediate2);
fprintf(fp, "\t.attr = %x, .opnd_bytes = %d, .addr_bytes = %d,\n",
insn->attr, insn->opnd_bytes, insn->addr_bytes);
fprintf(fp, "\t.length = %d, .x86_64 = %d, .kaddr = %p}\n",
insn->length, insn->x86_64, insn->kaddr);
}
static void parse_args(int argc, char **argv)
{
int c;
prog = argv[0];
while ((c = getopt(argc, argv, "ynv")) != -1) {
switch (c) {
case 'y':
x86_64 = 1;
break;
case 'n':
x86_64 = 0;
break;
case 'v':
verbose = 1;
break;
default:
usage();
}
}
}
#define BUFSIZE 256
int main(int argc, char **argv)
@ -57,15 +113,9 @@ int main(int argc, char **argv)
char line[BUFSIZE];
unsigned char insn_buf[16];
struct insn insn;
int insns = 0;
int x86_64 = 0;
int insns = 0, c;
prog = argv[0];
if (argc > 2)
usage();
if (argc == 2 && argv[1][0] == 'y')
x86_64 = 1;
parse_args(argc, argv);
while (fgets(line, BUFSIZE, stdin)) {
char copy[BUFSIZE], *s, *tab1, *tab2;
@ -97,8 +147,10 @@ int main(int argc, char **argv)
if (insn.length != nb) {
fprintf(stderr, "Error: %s", line);
fprintf(stderr, "Error: objdump says %d bytes, but "
"insn_get_length() says %d (attr:%x)\n", nb,
insn.length, insn.attr);
"insn_get_length() says %d\n", nb,
insn.length);
if (verbose)
dump_insn(stderr, &insn);
exit(2);
}
}