1 #include <syscall.h> 2 #include <errno.h> 3 #include <stdio.h> 4 #include <stdlib.h> 5 6 #ifndef MLOCK_ONFAULT 7 #define MLOCK_ONFAULT 1 8 #endif 9 10 #ifndef MCL_ONFAULT 11 #define MCL_ONFAULT (MCL_FUTURE << 1) 12 #endif 13 14 static int mlock2_(void *start, size_t len, int flags) 15 { 16 #ifdef __NR_mlock2 17 return syscall(__NR_mlock2, start, len, flags); 18 #else 19 errno = ENOSYS; 20 return -1; 21 #endif 22 } 23 24 static FILE *seek_to_smaps_entry(unsigned long addr) 25 { 26 FILE *file; 27 char *line = NULL; 28 size_t size = 0; 29 unsigned long start, end; 30 char perms[5]; 31 unsigned long offset; 32 char dev[32]; 33 unsigned long inode; 34 char path[BUFSIZ]; 35 36 file = fopen("/proc/self/smaps", "r"); 37 if (!file) { 38 perror("fopen smaps"); 39 _exit(1); 40 } 41 42 while (getline(&line, &size, file) > 0) { 43 if (sscanf(line, "%lx-%lx %s %lx %s %lu %s\n", 44 &start, &end, perms, &offset, dev, &inode, path) < 6) 45 goto next; 46 47 if (start <= addr && addr < end) 48 goto out; 49 50 next: 51 free(line); 52 line = NULL; 53 size = 0; 54 } 55 56 fclose(file); 57 file = NULL; 58 59 out: 60 free(line); 61 return file; 62 } 63
