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/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/panic.h>
#include <sys/spinlock.h>
#include <sys/syslog.h>
#include <sys/reboot.h>
/*
* Burn and sizzle - the core logic that really ends
* things ::)
*
* @do_trace: If true, a backtrace will be printed
* @reboot_type: REBOOT_* defines
*/
static void
bas(bool do_trace, int reboot_type)
{
static struct spinlock lock = {0};
spinlock_acquire(&lock); /* Never released */
if (do_trace) {
kprintf(OMIT_TIMESTAMP "** backtrace\n");
md_backtrace();
}
cpu_reboot(reboot_type);
__builtin_unreachable();
}
/*
* Tells the user something terribly wrong happened then
* halting the system as soon as possible.
*
* XXX: There is no need to cleanup stuff here (e.g `va_list ap`)
* as we won't be returning from here anyways and the source
* of the panic could be *anywhere* so it's best not to mess with
* things.
*/
void
panic(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
kprintf(OMIT_TIMESTAMP "panic: ");
vkprintf(fmt, &ap);
bas(true, REBOOT_HALT);
__builtin_unreachable();
}
/*
* Halt and catch fire - immediately ceases all system activity
* with an optional message.
*
* @fmt: printf() format string, NULL to not
* specify any message (not recommended)
*/
void
hcf(const char *fmt, ...)
{
va_list ap;
if (fmt != NULL) {
va_start(ap, fmt);
kprintf(OMIT_TIMESTAMP);
vkprintf(fmt, &ap);
}
bas(true, REBOOT_HALT);
__builtin_unreachable();
}
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