31 lines
581 B
C
31 lines
581 B
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;
|
||
|
|
}
|