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      1 /* $NetBSD: abortfixup.c,v 1.10 2011/10/17 16:39:15 mbalmer Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  *
     28  *
     29  * Trying out if an unhandled instruction pattern in the late abort fixup
     30  * generates a panic or sysfaults like it ought to do.
     31  */
     32 
     33 #include <sys/types.h>
     34 
     35 __RCSID("$NetBSD: abortfixup.c,v 1.10 2011/10/17 16:39:15 mbalmer Exp $");
     36 
     37 #include <setjmp.h>
     38 #include <signal.h>
     39 #include <stdio.h>
     40 #include <stdlib.h>
     41 #include <stdio.h>
     42 #include <err.h>
     43 
     44 jmp_buf buf;
     45 
     46 void
     47 sighandler(int sig)
     48 {
     49 
     50 	/* Catching SIGSEGV means the test passed. */
     51 	longjmp(buf, 1);
     52 }
     53 
     54 int
     55 main(void)
     56 {
     57 
     58 	if (signal(SIGSEGV, sighandler) == SIG_ERR)
     59 		err(1, "signal");
     60 
     61 	printf("ARM6/7 abort fixup panic\n");
     62 
     63 	/*
     64  	 * issue an instruction that for certain generates a page
     65 	 * fault but _can't_ be fixed up by late abort fixup
     66 	 * routines due to its structure.
     67 	 */
     68 
     69 	if (setjmp(buf) == 0) {
     70 		__asm volatile (
     71 		"	mov r0, #0			\n"
     72 		"	mov r1, r0			\n"
     73 		"	str r1, [r0], r1, ror #10");
     74 
     75 		/* Should not be reached if OK */
     76 		printf("!!! Regression test FAILED - no SEGV received\n");
     77 		exit(1);
     78 	}
     79 
     80 	printf("ARM2/3 abort address panic\n");
     81 
     82 	/* Similar but pre-indexed, to check ARM2/3 abort address function. */
     83 
     84 	if (setjmp(buf) == 0) {
     85 		__asm volatile (
     86 		"	mov r0, #0			\n"
     87 		"	mov r1, r0			\n"
     88 		"	str r1, [r0, r1, ror #10]");
     89 
     90 		/* Should not be reached if OK */
     91 		printf("!!! Regression test FAILED - no SEGV received\n");
     92 		exit(1);
     93 	}
     94 
     95 	printf("All OK\n");
     96 
     97 	exit(0);
     98 };
     99