1 /* Copyright 2017 Yaakov Selkowitz <yselkowi@redhat.com> */
2 #include <signal.h>
3 #include <string.h>
4 #include <unistd.h>
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <ssp/ssp.h>
8 #undef puts
9 
10 static void (*fortify_handler)(int sig);
11 
12 #define CHK_FAIL_MSG "*** overflow detected ***: terminated"
13 
14 _Noreturn void
__chk_fail(void)15 __chk_fail(void)
16 {
17 #ifdef TINY_STDIO
18   puts(CHK_FAIL_MSG);
19 #else
20   static const char msg[] = CHK_FAIL_MSG "\n";
21   write (2, msg, sizeof(msg)-1);
22 #endif
23   if (fortify_handler)
24       (*fortify_handler)(SIGABRT);
25   abort();
26 }
27 
28 void
set_fortify_handler(void (* handler)(int sig))29 set_fortify_handler (void (*handler) (int sig))
30 {
31     fortify_handler = handler;
32 }
33