os-k/kaleid/kernel/ke/panic.c

87 lines
3.0 KiB
C

//----------------------------------------------------------------------------//
// GNU GPL OS/K //
// //
// Desc: How NOT to panic 101 //
// //
// //
// Copyright © 2018-2019 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K is free software: you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation, either version 3 of the License, or //
// any later version. //
// //
// OS/K 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 General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------//
#include <extras/buf.h>
#include <kernel/proc.h>
#include <kernel/iomisc.h>
error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap);
//
// Failed assert() handler
//
noreturn void __assert_handler(const char *msg,
const char *file,
int line,
const char *func)
{
KeDisableIRQs();
KeStartPanic("In function '%s', from '%s' line %d\nAssertion failed:\n"
"'%s'", func, file, line, msg);
}
//
// Your best boy panic()
// This is CPU local...
//
noreturn void KeStartPanic(const char *fmt, ...)
{
va_list ap;
KeDisableIRQs();
PsCurProc = NULL;
if (BStdOut == NULL) KeCrashSystem();
ExAttemptLock(&BStdOut->lock);
if (fmt == NULL) {
fmt = "(no message given)";
}
if (KeIsPanicking) {
bprintf(BStdOut, "\nDouble panic!");
KeHaltCPU();
}
KeIsPanicking = 1;
// We don't check vbprintf's output
// If it fails, what could we do anyway?
bprintf(BStdOut, "\nPANIC\n");
va_start(ap, fmt);
vbprintf(BStdOut, fmt, ap);
va_end(ap);
bputc(BStdOut, '\n');
BStdOut->flusher(BStdOut);
KeHaltCPU();
}