#include #include #include #include "tests/sys_mman.h" static void handler(int sig, siginfo_t *info, void *v) { printf("info: sig=%d code=%d addr=%p\n", info->si_signo, info->si_code, info->si_addr); exit(0); } /* Blocking a fault (for example SIGSEGV) won't work, and is the same as having the default handler. */ int main() { int* unmapped_page = get_unmapped_page(); struct sigaction sa; sigset_t mask; sa.sa_sigaction = handler; sigemptyset(&sa.sa_mask); sa.sa_flags = SA_SIGINFO; sigaction(SIGSEGV, &sa, NULL); sigfillset(&mask); sigprocmask(SIG_BLOCK, &mask, NULL); *(volatile int *)unmapped_page = 213; return 0; }