// SPDX-License-Identifier: GPL-2.0
static int find_map(void **start, void **end, const char *name)
{
        FILE *maps;
        char line[128];
        int found = 0;

        maps = fopen("/proc/self/maps", "r");
        if (!maps) {
                fprintf(stderr, "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], name, strlen(name)))
                        found = 1;
        }

        fclose(maps);
        return !found;
}