minix/kernel/utility.c
2007-04-23 13:58:37 +00:00

68 lines
2 KiB
C
Executable file

/* This file contains a collection of miscellaneous procedures:
* panic: abort MINIX due to a fatal error
* kprintf: (from lib/sysutil/kprintf.c)
* kputc: buffered putc used by kernel kprintf
*/
#include "kernel.h"
#include "proc.h"
#include <unistd.h>
#include <signal.h>
/*===========================================================================*
* panic *
*===========================================================================*/
PUBLIC void panic(mess,nr)
_CONST char *mess;
int nr;
{
/* The system has run aground of a fatal kernel error. Terminate execution. */
static int panicking = 0;
if (panicking ++) return; /* prevent recursive panics */
if (mess != NULL) {
kprintf("\nKernel panic: %s", mess);
if (nr != NO_NUM) kprintf(" %d", nr);
kprintf("\n");
}
/* Abort MINIX. */
prepare_shutdown(RBT_PANIC);
}
/* Include system printf() implementation named kprintf() */
#define printf kprintf
#include "../lib/sysutil/kprintf.c"
#define END_OF_KMESS 0
/*===========================================================================*
* kputc *
*===========================================================================*/
PUBLIC void kputc(c)
int c; /* character to append */
{
/* Accumulate a single character for a kernel message. Send a notification
* to the output driver if an END_OF_KMESS is encountered.
*/
if (c != END_OF_KMESS) {
if (do_serial_debug) {
if(c == '\n')
ser_putc('\r');
ser_putc(c);
}
kmess.km_buf[kmess.km_next] = c; /* put normal char in buffer */
if (kmess.km_size < KMESS_BUF_SIZE)
kmess.km_size += 1;
kmess.km_next = (kmess.km_next + 1) % KMESS_BUF_SIZE;
} else {
int p, outprocs[] = OUTPUT_PROCS_ARRAY;
for(p = 0; outprocs[p] != NONE; p++) {
if(isokprocn(outprocs[p]) && !isemptyn(outprocs[p])) {
send_sig(outprocs[p], SIGKMESS);
}
}
}
}