[mirror_ubuntu-artful-kernel.git] / tools / perf / util / find-vdso-map.c

static int find_vdso_map(void **start, void **end)
{
	FILE *maps;
	char line[128];
	int found = 0;

	maps = fopen("/proc/self/maps", "r");
	if (!maps) {
		fprintf(stderr, "vdso: cannot open maps\n");
		return -1;
	}

	while (!found && fgets(line, sizeof(line), maps)) {
		int m = -1;

		/* We care only about private r-x mappings. */
		if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n",
				start, end, &m))
			continue;
		if (m < 0)
			continue;

		if (!strncmp(&line[m], VDSO__MAP_NAME,
			     sizeof(VDSO__MAP_NAME) - 1))
			found = 1;
	}

	fclose(maps);
	return !found;
}
Commit	Line	Data
e477f3f0 AH	1	static int find_vdso_map(void start, void end)
	2	{
	3	FILE *maps;
	4	char line[128];
	5	int found = 0;
	6
	7	maps = fopen("/proc/self/maps", "r");
	8	if (!maps) {
	9	fprintf(stderr, "vdso: cannot open maps\n");
	10	return -1;
	11	}
	12
	13	while (!found && fgets(line, sizeof(line), maps)) {
	14	int m = -1;
	15
	16	/* We care only about private r-x mappings. */
	17	if (2 != sscanf(line, "%p-%p r-xp %x %x:%x %u %n",
	18	start, end, &m))
	19	continue;
	20	if (m < 0)
	21	continue;
	22
	23	if (!strncmp(&line[m], VDSO__MAP_NAME,
	24	sizeof(VDSO__MAP_NAME) - 1))
	25	found = 1;
	26	}
	27
	28	fclose(maps);
	29	return !found;
	30	}