1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * x86 decoder sanity test - based on test_get_insn.c
24  * access out-of-instruction-buffer.
32 static int		x86_64;		/* x86-64 bit mode flag */
33 static unsigned int	seed;		/* Random seed */  variable
42 	fprintf(stderr, "Usage: %s [-y|-n|-v] [-s seed[,no]] [-m max] [-i input]\n", prog);  in usage()
43 	fprintf(stderr, "\t-y	64bit mode\n");  in usage()
44 	fprintf(stderr, "\t-n	32bit mode\n");  in usage()
45 	fprintf(stderr, "\t-v	Verbosity(-vv dumps any decoded result)\n");  in usage()
46 	fprintf(stderr, "\t-s	Give a random seed (and iteration number)\n");  in usage()
47 	fprintf(stderr, "\t-m	Give a maximum iteration number\n");  in usage()
48 	fprintf(stderr, "\t-i	Give an input file with decoded binary\n");  in usage()
57 		indent, field->value, field->bytes[0], field->bytes[1],  in dump_field()
58 		field->bytes[2], field->bytes[3]);  in dump_field()
60 		field->got, field->nbytes);  in dump_field()
66 	dump_field(fp, "prefixes", "\t",	&insn->prefixes);  in dump_insn()
67 	dump_field(fp, "rex_prefix", "\t",	&insn->rex_prefix);  in dump_insn()
68 	dump_field(fp, "vex_prefix", "\t",	&insn->vex_prefix);  in dump_insn()
69 	dump_field(fp, "opcode", "\t",		&insn->opcode);  in dump_insn()
70 	dump_field(fp, "modrm", "\t",		&insn->modrm);  in dump_insn()
71 	dump_field(fp, "sib", "\t",		&insn->sib);  in dump_insn()
72 	dump_field(fp, "displacement", "\t",	&insn->displacement);  in dump_insn()
73 	dump_field(fp, "immediate1", "\t",	&insn->immediate1);  in dump_insn()
74 	dump_field(fp, "immediate2", "\t",	&insn->immediate2);  in dump_insn()
76 		insn->attr, insn->opnd_bytes, insn->addr_bytes);  in dump_insn()
78 		insn->length, insn->x86_64, insn->kaddr);  in dump_insn()
96 	fprintf(fp, " | %s -i -\n", prog);  in dump_stream()
100 		/* Give a seed and iteration number */  in dump_stream()
101 		fprintf(fp, " $ %s -s 0x%x,%lu\n", prog, seed, nr_iter);  in dump_stream()
113 	if (read(fd, &seed, sizeof(seed)) != sizeof(seed))  in init_random_seed()
149 	for (i = 0; i < MAX_INSN_SIZE - 1; i += 2)  in generate_insn()
165 	while ((c = getopt(argc, argv, "ynvs:m:i:")) != -1) {  in parse_args()
177 			if (strcmp("-", optarg) == 0)  in parse_args()
185 			seed = (unsigned int)strtoul(optarg, &tmp, 0);  in parse_args()
191 				usage("Failed to parse seed");  in parse_args()
206 		usage("Max iteration number must be bigger than iter-num");  in parse_args()
209 		usage("Don't use input file (-i) with random seed (-s)");  in parse_args()
211 	/* Initialize random seed */  in parse_args()
213 		if (!set_seed)	/* No seed is given */  in parse_args()
215 		srand(seed);  in parse_args()
245 			/* Access out-of-range memory */  in main()
256 		"%s: %s: decoded and checked %d %s instructions with %d errors (seed:0x%x)\n",  in main()
262 		seed);  in main()