Last change
on this file since 444 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
File size:
976 bytes
|
Rev | Line | |
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[444] | 1 | #include <sys/cdefs.h> |
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| 2 | #include <sys/param.h> |
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| 3 | #include <signal.h> |
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| 4 | #include <stdlib.h> |
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| 5 | #include <string.h> |
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| 6 | #include <unistd.h> |
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| 7 | |
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| 8 | uintptr_t __stack_chk_guard = 0; |
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| 9 | |
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| 10 | void |
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| 11 | __attribute__((__constructor__)) |
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| 12 | __stack_chk_init (void) |
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| 13 | { |
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| 14 | if (__stack_chk_guard != 0) |
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| 15 | return; |
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| 16 | |
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| 17 | #if defined(__CYGWIN__) || defined(__rtems__) |
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| 18 | arc4random_buf(&__stack_chk_guard, sizeof(__stack_chk_guard)); |
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| 19 | #else |
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| 20 | /* If getentropy is not available, use the "terminator canary". */ |
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| 21 | ((unsigned char *)&__stack_chk_guard)[0] = 0; |
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| 22 | ((unsigned char *)&__stack_chk_guard)[1] = 0; |
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| 23 | ((unsigned char *)&__stack_chk_guard)[2] = '\n'; |
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| 24 | ((unsigned char *)&__stack_chk_guard)[3] = 255; |
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| 25 | #endif |
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| 26 | } |
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| 27 | |
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| 28 | void |
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| 29 | __attribute__((__noreturn__)) |
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| 30 | __stack_chk_fail (void) |
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| 31 | { |
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| 32 | char msg[] = "*** stack smashing detected ***: terminated\n"; |
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| 33 | write (2, msg, strlen (msg)); |
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| 34 | raise (SIGABRT); |
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| 35 | _exit (127); |
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| 36 | } |
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| 37 | |
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| 38 | #ifdef __ELF__ |
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| 39 | void |
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| 40 | __attribute__((visibility ("hidden"))) |
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| 41 | __stack_chk_fail_local (void) |
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| 42 | { |
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| 43 | __stack_chk_fail(); |
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| 44 | } |
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| 45 | #endif |
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