1 // SPDX-License-Identifier: GPL-2.0 2 #include <stdio.h> 3 #include <stdlib.h> 4 #include <string.h> 5 6 static int find_map(void **start, void **end, const char *name) 7 { 8 FILE *maps; 9 char *line = NULL; 10 size_t len = 0; 11 int found = 0; 12 13 maps = fopen("/proc/self/maps", "r"); 14 if (!maps) { 15 fprintf(stderr, "cannot open maps\n"); 16 return -1; 17 } 18 19 while (!found && getline(&line, &len, maps) != -1) { 20 int m = -1; 21 22 /* We care only about private r-x mappings. */ 23 if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n", 24 start, end, &m)) 25 continue; 26 if (m < 0) 27 continue; 28 29 if (!strncmp(&line[m], name, strlen(name))) 30 found = 1; 31 } 32 33 free(line); 34 fclose(maps); 35 return !found; 36 } 37