1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
find_map(void ** start,void ** end,const char * name)2*4882a593Smuzhiyun static int find_map(void **start, void **end, const char *name)
3*4882a593Smuzhiyun {
4*4882a593Smuzhiyun FILE *maps;
5*4882a593Smuzhiyun char line[128];
6*4882a593Smuzhiyun int found = 0;
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun maps = fopen("/proc/self/maps", "r");
9*4882a593Smuzhiyun if (!maps) {
10*4882a593Smuzhiyun fprintf(stderr, "cannot open maps\n");
11*4882a593Smuzhiyun return -1;
12*4882a593Smuzhiyun }
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun while (!found && fgets(line, sizeof(line), maps)) {
15*4882a593Smuzhiyun int m = -1;
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun /* We care only about private r-x mappings. */
18*4882a593Smuzhiyun if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n",
19*4882a593Smuzhiyun start, end, &m))
20*4882a593Smuzhiyun continue;
21*4882a593Smuzhiyun if (m < 0)
22*4882a593Smuzhiyun continue;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun if (!strncmp(&line[m], name, strlen(name)))
25*4882a593Smuzhiyun found = 1;
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun fclose(maps);
29*4882a593Smuzhiyun return !found;
30*4882a593Smuzhiyun }
31