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make libkvm capable of dealing with a crashdump on alphas

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Reviewed by: Doug Rabson <dfr@nlsystems.com>
This commit is contained in:
Andrew Gallatin 1999-03-12 14:47:33 +00:00
parent e22d00060d
commit cad59f82df
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=44689
1 changed files with 65 additions and 50 deletions
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115
lib/libkvm/kvm_alpha.c
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@ -1,4 +1,4 @@
/* $Id$ */
/* $Id: kvm_alpha.c,v 1.1 1998/08/15 12:12:22 dfr Exp $ */
/* $NetBSD: kvm_alpha.c,v 1.7.2.1 1997/11/02 20:34:26 mellon Exp $ */
/*
@ -32,6 +32,8 @@
#include <sys/user.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <nlist.h>
#include <kvm.h>
@ -42,9 +44,17 @@
#include <limits.h>
#include <db.h>
#include <stdlib.h>
#include <machine/pmap.h>
#include "kvm_private.h"
static off_t _kvm_pa2off(kvm_t *kd, u_long pa);
struct vmstate {
u_int64_t lev1map_pa; /* PA of Lev1map */
u_int64_t page_size; /* Page size */
u_int64_t nmemsegs; /* Number of RAM segm */
};
void
_kvm_freevtop(kd)
kvm_t *kd;
@ -59,8 +69,39 @@ int
_kvm_initvtop(kd)
kvm_t *kd;
{
struct vmstate *vm;
struct nlist nlist[2];
u_long pa;
vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
if (vm == 0) {
_kvm_err(kd, kd->program, "cannot allocate vm");
return (-1);
}
kd->vmst = vm;
vm->page_size = ALPHA_PGBYTES;
nlist[0].n_name = "_Lev1map";
nlist[1].n_name = 0;
if (kvm_nlist(kd, nlist) != 0) {
_kvm_err(kd, kd->program, "bad namelist");
return (-1);
}
if(!ISALIVE(kd)) {
if (kvm_read(kd, (nlist[0].n_value), &pa, sizeof(pa)) != sizeof(pa)) {
_kvm_err(kd, kd->program, "cannot read Lev1map");
return (-1);
}
} else
if (kvm_read(kd, (nlist[0].n_value), &pa, sizeof(pa)) != sizeof(pa)) {
_kvm_err(kd, kd->program, "cannot read Lev1map");
return (-1);
}
vm->lev1map_pa = pa;
return (0);
}
int
@ -69,35 +110,42 @@ _kvm_kvatop(kd, va, pa)
u_long va;
u_long *pa;
{
#if 0
cpu_kcore_hdr_t *cpu_kh;
u_int64_t lev1map_pa; /* PA of Lev1map */
u_int64_t page_size;
int rv, page_off;
alpha_pt_entry_t pte;
off_t pteoff;
struct vmstate *vm;
vm = kd->vmst ;
if (ISALIVE(kd)) {
_kvm_err(kd, 0, "vatop called in live kernel!");
return(0);
}
lev1map_pa = vm->lev1map_pa;
page_size = vm->page_size;
cpu_kh = kd->cpu_data;
page_off = va & (cpu_kh->page_size - 1);
page_off = va & (page_size - 1);
if (va >= ALPHA_K0SEG_BASE && va <= ALPHA_K0SEG_END) {
/*
* Direct-mapped address: just convert it.
*/
*pa = ALPHA_K0SEG_TO_PHYS(va);
rv = cpu_kh->page_size - page_off;
rv = page_size - page_off;
} else if (va >= ALPHA_K1SEG_BASE && va <= ALPHA_K1SEG_END) {
/*
* Real kernel virtual address: do the translation.
*/
#define PTMASK ((1 << ALPHA_PTSHIFT) - 1)
#define pmap_lev1_index(va) (((va) >> ALPHA_L1SHIFT) & PTMASK)
#define pmap_lev2_index(va) (((va) >> ALPHA_L2SHIFT) & PTMASK)
#define pmap_lev3_index(va) (((va) >> ALPHA_L3SHIFT) & PTMASK)
/* Find and read the L1 PTE. */
pteoff = cpu_kh->lev1map_pa +
kvtol1pte(va) * sizeof(alpha_pt_entry_t);
pteoff = lev1map_pa +
pmap_lev1_index(va) * sizeof(alpha_pt_entry_t);
if (lseek(kd->pmfd, _kvm_pa2off(kd, pteoff), 0) == -1 ||
read(kd->pmfd, (char *)&pte, sizeof(pte)) != sizeof(pte)) {
_kvm_syserr(kd, 0, "could not read L1 PTE");
@ -109,8 +157,8 @@ _kvm_kvatop(kd, va, pa)
_kvm_err(kd, 0, "invalid translation (invalid L1 PTE)");
goto lose;
}
pteoff = ALPHA_PTE_TO_PFN(pte) * cpu_kh->page_size +
vatoste(va) * sizeof(alpha_pt_entry_t);
pteoff = ALPHA_PTE_TO_PFN(pte) * page_size +
pmap_lev2_index(va) * sizeof(alpha_pt_entry_t);
if (lseek(kd->pmfd, _kvm_pa2off(kd, pteoff), 0) == -1 ||
read(kd->pmfd, (char *)&pte, sizeof(pte)) != sizeof(pte)) {
_kvm_syserr(kd, 0, "could not read L2 PTE");
@ -122,8 +170,8 @@ _kvm_kvatop(kd, va, pa)
_kvm_err(kd, 0, "invalid translation (invalid L2 PTE)");
goto lose;
}
pteoff = ALPHA_PTE_TO_PFN(pte) * cpu_kh->page_size +
vatopte(va) * sizeof(alpha_pt_entry_t);
pteoff = ALPHA_PTE_TO_PFN(pte) * page_size +
pmap_lev3_index(va) * sizeof(alpha_pt_entry_t);
if (lseek(kd->pmfd, _kvm_pa2off(kd, pteoff), 0) == -1 ||
read(kd->pmfd, (char *)&pte, sizeof(pte)) != sizeof(pte)) {
_kvm_syserr(kd, 0, "could not read L3 PTE");
@ -135,8 +183,8 @@ _kvm_kvatop(kd, va, pa)
_kvm_err(kd, 0, "invalid translation (invalid L3 PTE)");
goto lose;
}
*pa = ALPHA_PTE_TO_PFN(pte) * cpu_kh->page_size + page_off;
rv = cpu_kh->page_size - page_off;
*pa = ALPHA_PTE_TO_PFN(pte) * page_size + page_off;
rv = page_size - page_off;
} else {
/*
* Bogus address (not in KV space): punt.
@ -149,9 +197,6 @@ _kvm_kvatop(kd, va, pa)
}
return (rv);
#else
return (0);
#endif
}
/*
@ -162,36 +207,6 @@ _kvm_pa2off(kd, pa)
kvm_t *kd;
u_long pa;
{
#if 0
off_t off;
cpu_kcore_hdr_t *cpu_kh;
cpu_kh = kd->cpu_data;
off = 0;
pa -= cpu_kh->core_seg.start;
return (kd->dump_off + off + pa);
#else
return 0; /* XXX fixme */
#endif
return ALPHA_K0SEG_TO_PHYS(pa);
}
/*
* Machine-dependent initialization for ALL open kvm descriptors,
* not just those for a kernel crash dump. Some architectures
* have to deal with these NOT being constants! (i.e. m68k)
*/
int
_kvm_mdopen(kd)
kvm_t *kd;
{
#if 0 /* XXX fixme */
kd->usrstack = USRSTACK;
kd->min_uva = VM_MIN_ADDRESS;
kd->max_uva = VM_MAXUSER_ADDRESS;
#endif
return (0);
}