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/*
* Mach Operating System
* Copyright (c) 1993 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#include <mach/xen.h>
#include <kern/printf.h>
#include <stdarg.h>
#include "cpu_number.h"
#include <kern/lock.h>
#include <kern/thread.h>
#include <kern/debug.h>
#include <machine/loose_ends.h>
#include <machine/model_dep.h>
#include <device/cons.h>
#if NCPUS>1
simple_lock_data_t Assert_print_lock; /* uninited, we take our chances */
#endif
static void
do_cnputc(char c, vm_offset_t offset)
{
cnputc(c);
}
void
Assert(const char *exp, const char *file, int line)
{
#if NCPUS > 1
simple_lock(&Assert_print_lock);
printf("{%d} Assertion failed: file \"%s\", line %d\n",
cpu_number(), file, line);
simple_unlock(&Assert_print_lock);
#else
printf("Assertion `%s' failed in file \"%s\", line %d\n",
exp, file, line);
#endif
Debugger("assertion failure");
}
void SoftDebugger(message)
const char *message;
{
printf("Debugger invoked: %s\n", message);
#if !MACH_KDB
printf("But no debugger, continuing.\n");
return;
#endif
#if defined(vax) || defined(PC532)
asm("bpt");
#endif /* vax */
#ifdef sun3
current_thread()->pcb->flag |= TRACE_KDB;
asm("orw #0x00008000,sr");
#endif /* sun3 */
#ifdef sun4
current_thread()->pcb->pcb_flag |= TRACE_KDB;
asm("ta 0x81");
#endif /* sun4 */
#if defined(mips ) || defined(i860) || defined(alpha)
gimmeabreak();
#endif
#if defined(__i386__)
asm("int3");
#endif
}
void Debugger(message)
const char *message;
{
#if !MACH_KDB
panic("Debugger invoked, but there isn't one!");
#endif
SoftDebugger(message);
panic("Debugger returned!");
}
/* Be prepared to panic anytime,
even before panic_init() gets called from the "normal" place in kern/startup.c.
(panic_init() still needs to be called from there
to make sure we get initialized before starting multiple processors.) */
boolean_t panic_lock_initialized = FALSE;
decl_simple_lock_data(, panic_lock)
const char *panicstr;
int paniccpu;
void
panic_init(void)
{
if (!panic_lock_initialized)
{
panic_lock_initialized = TRUE;
simple_lock_init(&panic_lock);
}
}
#if ! MACH_KBD
extern boolean_t reboot_on_panic;
#endif
/*VARARGS1*/
void
panic(const char *s, ...)
{
va_list listp;
panic_init();
simple_lock(&panic_lock);
if (panicstr) {
if (cpu_number() != paniccpu) {
simple_unlock(&panic_lock);
halt_cpu();
/* NOTREACHED */
}
}
else {
panicstr = s;
paniccpu = cpu_number();
}
simple_unlock(&panic_lock);
printf("panic");
#if NCPUS > 1
printf("(cpu %U)", paniccpu);
#endif
printf(": ");
va_start(listp, s);
_doprnt(s, listp, do_cnputc, 0, 0);
va_end(listp);
printf("\n");
#if MACH_KDB
Debugger("panic");
#else
# ifdef MACH_HYP
hyp_crash();
# else
/* Give the user time to see the message */
{
int i = 1000; /* seconds */
while (i--)
delay (1000000); /* microseconds */
}
halt_all_cpus (reboot_on_panic);
# endif /* MACH_HYP */
#endif
}
/*
* We'd like to use BSD's log routines here...
*/
/*VARARGS2*/
void
log(int level, const char *fmt, ...)
{
va_list listp;
va_start(listp, fmt);
_doprnt(fmt, listp, do_cnputc, 0, 0);
va_end(listp);
}
/* GCC references this for stack protection. */
unsigned char __stack_chk_guard [ sizeof (vm_offset_t) ] =
{
[ sizeof (vm_offset_t) - 3 ] = '\r',
[ sizeof (vm_offset_t) - 2 ] = '\n',
[ sizeof (vm_offset_t) - 1 ] = 0xff,
};
void
__stack_chk_fail (void)
{
panic("stack smashing detected");
}
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