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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) IBM Corporation, 2009
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#ifdef __x86_64__
#define CONFIG_X86_64
#else
#define CONFIG_X86_32
#endif
#define unlikely(cond) (cond)
#include <asm/insn.h>
#include <inat.c>
#include <insn.c>
/*
* Test of instruction analysis in general and insn_get_length() in
* particular. See if insn_get_length() and the disassembler agree
* on the length of each instruction in an elf disassembly.
*
* Usage: objdump -d a.out | awk -f distill.awk | ./test_get_len
*/
const char *prog;
static void usage(void)
{
fprintf(stderr, "Usage: objdump -d a.out | awk -f distill.awk |"
" %s [y|n](64bit flag)\n", prog);
exit(1);
}
static void malformed_line(const char *line, int line_nr)
{
fprintf(stderr, "%s: malformed line %d:\n%s", prog, line_nr, line);
exit(3);
}
#define BUFSIZE 256
int main(int argc, char **argv)
{
char line[BUFSIZE];
unsigned char insn_buf[16];
struct insn insn;
int insns = 0;
int x86_64 = 0;
prog = argv[0];
if (argc > 2)
usage();
if (argc == 2 && argv[1][0] == 'y')
x86_64 = 1;
while (fgets(line, BUFSIZE, stdin)) {
char copy[BUFSIZE], *s, *tab1, *tab2;
int nb = 0;
unsigned int b;
insns++;
memset(insn_buf, 0, 16);
strcpy(copy, line);
tab1 = strchr(copy, '\t');
if (!tab1)
malformed_line(line, insns);
s = tab1 + 1;
s += strspn(s, " ");
tab2 = strchr(s, '\t');
if (!tab2)
malformed_line(line, insns);
*tab2 = '\0'; /* Characters beyond tab2 aren't examined */
while (s < tab2) {
if (sscanf(s, "%x", &b) == 1) {
insn_buf[nb++] = (unsigned char) b;
s += 3;
} else
break;
}
/* Decode an instruction */
insn_init(&insn, insn_buf, x86_64);
insn_get_length(&insn);
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);
exit(2);
}
}
fprintf(stderr, "Succeed: decoded and checked %d instructions\n",
insns);
return 0;
}
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