From 0263d78126287fdc81998ab2278379af9e9fab6f Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Tue, 4 Jun 2024 14:57:45 -0400 Subject: kernel: Add panic() Signed-off-by: Ian Moffett --- sys/kern/kern_panic.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 sys/kern/kern_panic.c (limited to 'sys/kern') diff --git a/sys/kern/kern_panic.c b/sys/kern/kern_panic.c new file mode 100644 index 0000000..0a17456 --- /dev/null +++ b/sys/kern/kern_panic.c @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2023-2024 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 +#include +#include +#include + +/* + * 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; + static struct spinlock lock = {0}; + + spinlock_acquire(&lock); /* Never released */ + va_start(ap, fmt); + + kprintf(OMIT_TIMESTAMP "panic: "); + vkprintf(fmt, &ap); + + cpu_reboot(REBOOT_HALT); + __builtin_unreachable(); +} -- cgit v1.2.3