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Do not ever try to coredump adapter memory regions.

Browse Source 
PR:		4486
Submitted by:	tegge@idi.ntnu.no (Tor Egge)

Implement a function is_adapter_memory() in order to determine what
should nto be dumped at all.  Currently, only populated with the ``ISA
memory hole''.  Adapter regions of other busses should be added.
This commit is contained in:
Joerg Wunsch 1997-09-10 12:31:40 +00:00
parent 0ac80091c3
commit e0b78e19f2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=29280
6 changed files with 76 additions and 10 deletions
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30
sys/amd64/amd64/vm_machdep.c
View File

@ -38,7 +38,7 @@
*
* from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
* Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
* $Id: vm_machdep.c,v 1.86 1997/08/26 18:10:34 peter Exp $
* $Id: vm_machdep.c,v 1.87 1997/09/02 20:05:31 bde Exp $
*/
#include "npx.h"
@ -957,3 +957,31 @@ vm_page_zero_idle()
#endif
return (1);
}
/*
* Tell whether this address is in some adapter memory region.
* Currently used by the kernel coredump code in order to avoid
* dumping the ``ISA memory hole'' which could cause indefinite hangs,
* or other unpredictable behaviour.
*/
#include "isa.h"
int
is_adapter_memory(addr)
vm_offset_t addr;
{
#if NISA > 0
/* The ISA ``memory hole''. */
if (addr >= 0xa0000 && addr < 0x100000)
return 1;
#endif
/*
* stuff other tests for known memory-mapped devices (PCI?)
* here
*/
return 0;
}

3
sys/amd64/include/md_var.h
View File

@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: md_var.h,v 1.15 1997/06/15 02:02:55 wollman Exp $
* $Id: md_var.h,v 1.16 1997/08/09 00:03:14 dyson Exp $
*/
#ifndef _MACHINE_MD_VAR_H_
@ -68,6 +68,7 @@ void doreti_popl_es __P((void)) __asm(__STRING(doreti_popl_es));
void doreti_popl_es_fault __P((void)) __asm(__STRING(doreti_popl_es_fault));
int fill_regs __P((struct proc *p, struct reg *regs));
void fillw __P((int /*u_short*/ pat, void *base, size_t cnt));
int is_adapter_memory __P((vm_offset_t addr));
u_long kvtop __P((void *addr));
void setidt __P((int idx, alias_for_inthand_t *func, int typ, int dpl,
int selec));

30
sys/i386/i386/vm_machdep.c
View File

@ -38,7 +38,7 @@
*
* from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
* Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
* $Id: vm_machdep.c,v 1.86 1997/08/26 18:10:34 peter Exp $
* $Id: vm_machdep.c,v 1.87 1997/09/02 20:05:31 bde Exp $
*/
#include "npx.h"
@ -957,3 +957,31 @@ vm_page_zero_idle()
#endif
return (1);
}
/*
* Tell whether this address is in some adapter memory region.
* Currently used by the kernel coredump code in order to avoid
* dumping the ``ISA memory hole'' which could cause indefinite hangs,
* or other unpredictable behaviour.
*/
#include "isa.h"
int
is_adapter_memory(addr)
vm_offset_t addr;
{
#if NISA > 0
/* The ISA ``memory hole''. */
if (addr >= 0xa0000 && addr < 0x100000)
return 1;
#endif
/*
* stuff other tests for known memory-mapped devices (PCI?)
* here
*/
return 0;
}

3
sys/i386/include/md_var.h
View File

@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: md_var.h,v 1.15 1997/06/15 02:02:55 wollman Exp $
* $Id: md_var.h,v 1.16 1997/08/09 00:03:14 dyson Exp $
*/
#ifndef _MACHINE_MD_VAR_H_
@ -68,6 +68,7 @@ void doreti_popl_es __P((void)) __asm(__STRING(doreti_popl_es));
void doreti_popl_es_fault __P((void)) __asm(__STRING(doreti_popl_es_fault));
int fill_regs __P((struct proc *p, struct reg *regs));
void fillw __P((int /*u_short*/ pat, void *base, size_t cnt));
int is_adapter_memory __P((vm_offset_t addr));
u_long kvtop __P((void *addr));
void setidt __P((int idx, alias_for_inthand_t *func, int typ, int dpl,
int selec));

10
sys/i386/isa/wd.c
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)wd.c 7.2 (Berkeley) 5/9/91
* $Id: wd.c,v 1.135 1997/08/09 01:44:25 julian Exp $
* $Id: wd.c,v 1.136 1997/09/04 18:49:47 sos Exp $
*/
/* TODO:
@ -2106,8 +2106,12 @@ wddump(dev_t dev)
return (EIO);
}
while (blkcnt != 0) {
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1, trunc_page(addr),
VM_PROT_READ, TRUE);
if (is_adapter_memory((vm_offset_t)addr))
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
trunc_page(0), VM_PROT_READ, TRUE);
else
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
trunc_page(addr), VM_PROT_READ, TRUE);
/* Ready to send data? */
DELAY(5); /* ATA spec */

10
sys/scsi/sd.c
View File

@ -15,7 +15,7 @@
*
* Ported to run under 386BSD by Julian Elischer (julian@dialix.oz.au) Sept 1992
*
* $Id: sd.c,v 1.107 1997/08/09 01:44:22 julian Exp $
* $Id: sd.c,v 1.108 1997/09/02 20:06:37 bde Exp $
*/
#include "opt_bounce.h"
@ -997,8 +997,12 @@ sddump(dev_t dev)
blknum = dumplo + blkoff;
while (num > 0) {
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1, trunc_page(addr),
VM_PROT_READ, TRUE);
if (is_adapter_memory((vm_offset_t)addr))
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
trunc_page(0), VM_PROT_READ, TRUE);
else
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
trunc_page(addr), VM_PROT_READ, TRUE);
/*
* Fill out the scsi command
*/