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Enable crashdumps on alphas.

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Reviewed by: Doug Rabson <dfr@nlsystems.com>
This commit is contained in:
Andrew Gallatin 1999-03-12 14:44:46 +00:00
parent 37d39f0a50
commit 19fa470d92
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=44687
1 changed files with 53 additions and 1 deletions
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54
sys/alpha/alpha/autoconf.c
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@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: autoconf.c,v 1.12 1998/10/30 01:36:40 jkh Exp $
* $Id: autoconf.c,v 1.13 1999/01/20 19:22:24 peter Exp $
*/
#include "opt_bootp.h"
@ -63,6 +63,8 @@ SYSINIT(configure, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL)
static void configure_finish __P((void));
static void configure_start __P((void));
static int setdumpdev __P((dev_t dev));
device_t isa_bus_device = 0;
struct cam_sim *boot_sim = 0;
@ -255,4 +257,54 @@ cpu_rootconf()
void
cpu_dumpconf()
{
if (setdumpdev(dumpdev) != 0)
dumpdev = NODEV;
}
static int
setdumpdev(dev)
dev_t dev;
{
int maj, psize;
long newdumplo;
if (dev == NODEV) {
dumpdev = dev;
return (0);
}
maj = major(dev);
if (maj >= nblkdev || bdevsw[maj] == NULL)
return (ENXIO); /* XXX is this right? */
if (bdevsw[maj]->d_psize == NULL)
return (ENXIO); /* XXX should be ENODEV ? */
psize = bdevsw[maj]->d_psize(dev);
if (psize == -1)
return (ENXIO); /* XXX should be ENODEV ? */
/*
* XXX should clean up checking in dumpsys() to be more like this,
* and nuke dodump sysctl (too many knobs), and move this to
* kern_shutdown.c...
*/
newdumplo = psize - Maxmem * PAGE_SIZE / DEV_BSIZE;
if (newdumplo < 0)
return (ENOSPC);
dumpdev = dev;
dumplo = newdumplo;
return (0);
}
static int
sysctl_kern_dumpdev SYSCTL_HANDLER_ARGS
{
int error;
dev_t ndumpdev;
ndumpdev = dumpdev;
error = sysctl_handle_opaque(oidp, &ndumpdev, sizeof ndumpdev, req);
if (error == 0 && req->newptr != NULL)
error = setdumpdev(ndumpdev);
return (error);
}
SYSCTL_PROC(_kern, KERN_DUMPDEV, dumpdev, CTLTYPE_OPAQUE|CTLFLAG_RW,
0, sizeof dumpdev, sysctl_kern_dumpdev, "T,dev_t", "");