Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Don't rely on a constant page shift value; dynamically compute it based

Browse Source 
on the page size in the crash dump header.
This commit is contained in:
thorpej 1998-03-25 00:47:20 +00:00
parent 8fc4366b1d
commit aa9e487ddc
1 changed files with 31 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
lib/libkvm/kvm_alpha.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: kvm_alpha.c,v 1.10 1998/03/03 00:07:30 thorpej Exp $ */
/* $NetBSD: kvm_alpha.c,v 1.11 1998/03/25 00:47:20 thorpej Exp $ */
/*
* Copyright (c) 1994, 1995 Carnegie-Mellon University.
@ -27,6 +27,8 @@
* rights to redistribute these changes.
*/
#define __KVM_ALPHA_PRIVATE /* see <machine/pte.h> */
#include <sys/param.h>
#include <sys/user.h>
#include <sys/proc.h>
@ -46,12 +48,15 @@
#include "kvm_private.h"
struct vmstate {
vm_size_t page_shift;
};
void
_kvm_freevtop(kd)
kvm_t *kd;
{
/* Not actually used for anything right now, but safe. */
if (kd->vmst != 0)
free(kd->vmst);
}
@ -60,7 +65,25 @@ int
_kvm_initvtop(kd)
kvm_t *kd;
{
cpu_kcore_hdr_t *cpu_kh;
struct vmstate *vm;
vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
if (vm == NULL)
return (-1);
cpu_kh = kd->cpu_data;
/* Compute page_shift. */
for (vm->page_shift = 0; (1 << vm->page_shift) < cpu_kh->page_size;
vm->page_shift++)
/* nothing */ ;
if ((1 << vm->page_shift) != cpu_kh->page_size) {
free(vm);
return (-1);
}
kd->vmst = vm;
return (0);
}
@ -71,6 +94,7 @@ _kvm_kvatop(kd, va, pa)
u_long *pa;
{
cpu_kcore_hdr_t *cpu_kh;
struct vmstate *vm;
int rv, page_off;
alpha_pt_entry_t pte;
off_t pteoff;
@ -81,8 +105,11 @@ _kvm_kvatop(kd, va, pa)
}
cpu_kh = kd->cpu_data;
vm = kd->vmst;
page_off = va & (cpu_kh->page_size - 1);
#define PAGE_SHIFT vm->page_shift
if (va >= ALPHA_K0SEG_BASE && va <= ALPHA_K0SEG_END) {
/*
* Direct-mapped address: just convert it.
@ -148,6 +175,8 @@ lose:
rv = 0;
}
#undef PAGE_SHIFT
return (rv);
}