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implement a simple (mostly brain-dead; old-style) kernel core dump routine, 

which dumps all "system"-cluster memory we know about.
This commit is contained in:
cgd 1996-10-01 14:25:47 +00:00
parent e5629b37cc
commit 4f59e73235
1 changed files with 66 additions and 15 deletions
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79
sys/arch/alpha/alpha/machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.41 1996/09/10 19:13:42 cgd Exp $ */
/* $NetBSD: machdep.c,v 1.42 1996/10/01 14:25:47 cgd Exp $ */
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@ -802,10 +802,12 @@ boot(howto, bootstr)
splhigh();
/* If rebooting and a dump is requested do it. */
if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) {
savectx(&dumppcb, 0);
#if 0
if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
#else
if (howto & RB_DUMP)
#endif
dumpsys();
}
haltsys:
@ -855,7 +857,6 @@ dumpconf()
if (nblks <= ctod(1))
return;
/* XXX XXX XXX STARTING MEMORY LOCATION */
dumpsize = physmem;
/* Always skip the first CLBYTES, in case there is a label there. */
@ -870,26 +871,72 @@ dumpconf()
}
/*
* Doadump comes here after turning off memory management and
* getting on the dump stack, either when called above, or by
* the auto-restart code.
* Dump the kernel's image to the swap partition.
*/
#define BYTES_PER_DUMP NBPG
void
dumpsys()
{
unsigned bytes, i, n;
int maddr, psize;
daddr_t blkno;
int (*dump) __P((dev_t, daddr_t, caddr_t, size_t));
int error;
msgbufmapped = 0;
/* Save registers. */
savectx(&dumppcb);
msgbufmapped = 0; /* don't record dump msgs in msgbuf */
if (dumpdev == NODEV)
return;
if (dumpsize == 0) {
dumpconf();
/*
* For dumps during autoconfiguration,
* if dump device has already configured...
*/
if (dumpsize == 0)
dumpconf();
if (dumplo < 0)
return;
}
printf("\ndumping to dev %x, offset %ld\n", dumpdev, dumplo);
psize = (*bdevsw[major(dumpdev)].d_psize)(dumpdev);
printf("dump ");
switch ((*bdevsw[major(dumpdev)].d_dump)(dumpdev)) {
if (psize == -1) {
printf("area unavailable\n");
return;
}
/* XXX should purge all outstanding keystrokes. */
bytes = ctob(1 + lastusablepage - firstusablepage);
maddr = ctob(firstusablepage);
blkno = dumplo;
dump = bdevsw[major(dumpdev)].d_dump;
error = 0;
for (i = 0; i < bytes; i += n) {
/* Print out how many MBs we to go. */
n = bytes - i;
if (n && (n % (1024*1024)) == 0)
printf("%d ", n / (1024 * 1024));
/* Limit size for next transfer. */
if (n > BYTES_PER_DUMP)
n = BYTES_PER_DUMP;
error = (*dump)(dumpdev, blkno,
(caddr_t)ALPHA_PHYS_TO_K0SEG(maddr), n);
if (error)
break;
maddr += n;
blkno += btodb(n); /* XXX? */
/* XXX should look for keystrokes, to cancel. */
}
switch (error) {
case ENXIO:
printf("device bad\n");
@ -911,9 +958,13 @@ dumpsys()
printf("aborted from console\n");
break;
default:
case 0:
printf("succeeded\n");
break;
default:
printf("error %d\n", error);
break;
}
printf("\n\n");
delay(1000);