91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
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/* This file contains a collection of miscellaneous procedures:
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* panic: abort MINIX due to a fatal error
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* kputc: buffered putc used by kernel printf
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*/
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#include "kernel/kernel.h"
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#include "arch_proto.h"
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#include <minix/syslib.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include <signal.h>
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#include <string.h>
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#include <minix/sys_config.h>
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#define ARE_PANICING 0xDEADC0FF
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/*===========================================================================*
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* panic *
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*===========================================================================*/
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void panic(const char *fmt, ...)
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{
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va_list arg;
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/* The system has run aground of a fatal kernel error. Terminate execution. */
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if (kinfo.minix_panicing == ARE_PANICING) {
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reset();
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}
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kinfo.minix_panicing = ARE_PANICING;
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if (fmt != NULL) {
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printf("kernel panic: ");
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va_start(arg, fmt);
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vprintf(fmt, arg);
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printf("\n");
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}
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printf("kernel on CPU %d: ", cpuid);
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util_stacktrace();
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#if 0
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if(get_cpulocal_var(proc_ptr)) {
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printf("current process : ");
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proc_stacktrace(get_cpulocal_var(proc_ptr));
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}
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#endif
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/* Abort MINIX. */
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minix_shutdown(NULL);
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}
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/*===========================================================================*
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* kputc *
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*===========================================================================*/
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void kputc(c)
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int c; /* character to append */
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{
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/* Accumulate a single character for a kernel message. Send a notification
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* to the output drivers if an END_OF_KMESS is encountered.
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*/
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if (c != END_OF_KMESS) {
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int maxblpos = sizeof(kmess.kmess_buf) - 2;
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#ifdef DEBUG_SERIAL
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if (kinfo.do_serial_debug) {
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if(c == '\n')
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ser_putc('\r');
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ser_putc(c);
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}
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#endif
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kmess.km_buf[kmess.km_next] = c; /* put normal char in buffer */
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kmess.kmess_buf[kmess.blpos] = c;
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if (kmess.km_size < sizeof(kmess.km_buf))
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kmess.km_size += 1;
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kmess.km_next = (kmess.km_next + 1) % _KMESS_BUF_SIZE;
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if(kmess.blpos == maxblpos) {
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memmove(kmess.kmess_buf,
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kmess.kmess_buf+1, sizeof(kmess.kmess_buf)-1);
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} else kmess.blpos++;
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} else if (!(kinfo.minix_panicing || kinfo.do_serial_debug)) {
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send_diag_sig();
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}
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}
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/*===========================================================================*
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* _exit *
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*===========================================================================*/
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void _exit(e)
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int e; /* error code */
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{
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panic("_exit called from within the kernel, should not happen. (err %i)", e);
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}
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