| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #include <syscall.h> |
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| 3 | #include <errno.h> |
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| 4 | #include <stdio.h> |
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| 5 | #include <stdlib.h> |
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| 6 | |
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| 7 | static int mlock2_(void *start, size_t len, int flags) |
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| 8 | { |
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| 9 | return syscall(__NR_mlock2, start, len, flags); |
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| 10 | } |
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| 11 | |
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| 12 | static FILE *seek_to_smaps_entry(unsigned long addr) |
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| 13 | { |
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| 14 | FILE *file; |
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| 15 | char *line = NULL; |
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| 16 | size_t size = 0; |
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| 17 | unsigned long start, end; |
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| 18 | char perms[5]; |
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| 19 | unsigned long offset; |
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| 20 | char dev[32]; |
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| 21 | unsigned long inode; |
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| 22 | char path[BUFSIZ]; |
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| 23 | |
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| 24 | file = fopen("/proc/self/smaps" , "r" ); |
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| 25 | if (!file) |
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| 26 | ksft_exit_fail_msg(msg: "fopen smaps: %s\n" , strerror(errno)); |
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| 27 | |
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| 28 | while (getline(&line, &size, file) > 0) { |
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| 29 | if (sscanf(line, "%lx-%lx %s %lx %s %lu %s\n" , |
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| 30 | &start, &end, perms, &offset, dev, &inode, path) < 6) |
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| 31 | goto next; |
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| 32 | |
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| 33 | if (start <= addr && addr < end) |
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| 34 | goto out; |
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| 35 | |
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| 36 | next: |
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| 37 | free(line); |
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| 38 | line = NULL; |
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| 39 | size = 0; |
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| 40 | } |
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| 41 | |
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| 42 | fclose(file); |
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| 43 | file = NULL; |
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| 44 | |
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| 45 | out: |
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| 46 | free(line); |
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| 47 | return file; |
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| 48 | } |
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| 49 | |
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