You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
90 lines
2.5 KiB
90 lines
2.5 KiB
/* This file contains a collection of miscellaneous procedures:
|
|
* panic: abort MINIX due to a fatal error
|
|
* kputc: buffered putc used by kernel printf
|
|
*/
|
|
|
|
#include "kernel/kernel.h"
|
|
#include "arch_proto.h"
|
|
|
|
#include <minix/syslib.h>
|
|
#include <unistd.h>
|
|
#include <stdarg.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
|
|
#include <minix/sys_config.h>
|
|
|
|
#define ARE_PANICING 0xDEADC0FF
|
|
|
|
/*===========================================================================*
|
|
* panic *
|
|
*===========================================================================*/
|
|
void panic(const char *fmt, ...)
|
|
{
|
|
va_list arg;
|
|
/* The system has run aground of a fatal kernel error. Terminate execution. */
|
|
if (kinfo.minix_panicing == ARE_PANICING) {
|
|
reset();
|
|
}
|
|
kinfo.minix_panicing = ARE_PANICING;
|
|
if (fmt != NULL) {
|
|
printf("kernel panic: ");
|
|
va_start(arg, fmt);
|
|
vprintf(fmt, arg);
|
|
printf("\n");
|
|
}
|
|
|
|
printf("kernel on CPU %d: ", cpuid);
|
|
util_stacktrace();
|
|
|
|
#if 0
|
|
if(get_cpulocal_var(proc_ptr)) {
|
|
printf("current process : ");
|
|
proc_stacktrace(get_cpulocal_var(proc_ptr));
|
|
}
|
|
#endif
|
|
|
|
/* Abort MINIX. */
|
|
minix_shutdown(NULL);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* kputc *
|
|
*===========================================================================*/
|
|
void kputc(c)
|
|
int c; /* character to append */
|
|
{
|
|
/* Accumulate a single character for a kernel message. Send a notification
|
|
* to the output drivers if an END_OF_KMESS is encountered.
|
|
*/
|
|
if (c != END_OF_KMESS) {
|
|
int maxblpos = sizeof(kmess.kmess_buf) - 2;
|
|
#ifdef DEBUG_SERIAL
|
|
if (kinfo.do_serial_debug) {
|
|
if(c == '\n')
|
|
ser_putc('\r');
|
|
ser_putc(c);
|
|
}
|
|
#endif
|
|
kmess.km_buf[kmess.km_next] = c; /* put normal char in buffer */
|
|
kmess.kmess_buf[kmess.blpos] = c;
|
|
if (kmess.km_size < sizeof(kmess.km_buf))
|
|
kmess.km_size += 1;
|
|
kmess.km_next = (kmess.km_next + 1) % _KMESS_BUF_SIZE;
|
|
if(kmess.blpos == maxblpos) {
|
|
memmove(kmess.kmess_buf,
|
|
kmess.kmess_buf+1, sizeof(kmess.kmess_buf)-1);
|
|
} else kmess.blpos++;
|
|
} else if (!(kinfo.minix_panicing || kinfo.do_serial_debug)) {
|
|
send_diag_sig();
|
|
}
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* _exit *
|
|
*===========================================================================*/
|
|
void _exit(e)
|
|
int e; /* error code */
|
|
{
|
|
panic("_exit called from within the kernel, should not happen. (err %i)", e);
|
|
}
|
|
|