/* Copyright (C) 1991 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Hacked up for uClibc by Erik Andersen */ #define _GNU_SOURCE #include <features.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <signal.h> #include <errno.h> /* Our last ditch effort to commit suicide */ #if defined(__i386__) #define ABORT_INSTRUCTION asm ("hlt") #elif defined(__ia64__) #define ABORT_INSTRUCTION asm ("break 0") #elif defined(__mc68000__) #define ABORT_INSTRUCTION asm (".long 0xffffffff") #elif defined(__mips__) #define ABORT_INSTRUCTION asm ("break 255") #elif defined(__s390__) #define ABORT_INSTRUCTION asm (".word 0") #elif defined(__sparc__) #define ABORT_INSTRUCTION asm ("unimp 0xf00") #elif defined(__x86_64__) #define ABORT_INSTRUCTION asm ("hlt") #else #define ABORT_INSTRUCTION #endif extern void weak_function _stdio_term(void); extern void _exit __P((int __status)) __attribute__ ((__noreturn__)); static int been_there_done_that = 0; /* Be prepared in case multiple threads try to abort(). */ #ifdef __UCLIBC_HAS_THREADS__ #include <pthread.h> static pthread_mutex_t mylock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; # define LOCK pthread_mutex_lock(&mylock) # define UNLOCK pthread_mutex_unlock(&mylock); #else # define LOCK # define UNLOCK #endif /* Cause an abnormal program termination with core-dump. */ void abort(void) { sigset_t sigset; /* Make sure we acquire the lock before proceeding. */ LOCK; /* Unmask SIGABRT to be sure we can get it */ if (__sigemptyset(&sigset) == 0 && __sigaddset(&sigset, SIGABRT) == 0) { sigprocmask(SIG_UNBLOCK, &sigset, (sigset_t *) NULL); } /* If we are using stdio, try to shut it down. At the very least, * this will attempt to commit all buffered writes. It may also * unbuffer all writable files, or close them outright. * Check the stdio routines for details. */ if (_stdio_term) _stdio_term(); while (1) { /* Try to suicide with a SIGABRT. */ if (been_there_done_that == 0) { been_there_done_that++; UNLOCK; raise(SIGABRT); LOCK; } /* Still here? Try to remove any signal handlers. */ if (been_there_done_that == 1) { struct sigaction act; been_there_done_that++; memset (&act, '\0', sizeof (struct sigaction)); act.sa_handler = SIG_DFL; __sigfillset (&act.sa_mask); act.sa_flags = 0; sigaction (SIGABRT, &act, NULL); } /* Still here? Try to suicide with an illegal instruction */ if (been_there_done_that == 2) { been_there_done_that++; ABORT_INSTRUCTION; } /* Still here? Try to at least exit */ if (been_there_done_that == 3) { been_there_done_that++; _exit (127); } /* Still here? We're screwed. Sleepy time. Good night */ while (1) /* Try for ever and ever. */ ABORT_INSTRUCTION; } }