64-bit PowerPC KVM support.
This commit is contained in:
parent
65801ce52d
commit
b5d529643a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=209881
218
lib/libkvm/kvm_powerpc64.c
Normal file
218
lib/libkvm/kvm_powerpc64.c
Normal file
@ -0,0 +1,218 @@
|
||||
/*-
|
||||
* Copyright (c) 2008, Juniper Networks, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. Neither the name of the author nor the names of any co-contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/endian.h>
|
||||
#include <sys/kerneldump.h>
|
||||
#include <sys/mman.h>
|
||||
|
||||
#include <vm/vm.h>
|
||||
|
||||
#include <db.h>
|
||||
#include <elf.h>
|
||||
#include <limits.h>
|
||||
#include <kvm.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#include "kvm_private.h"
|
||||
|
||||
struct vmstate {
|
||||
void *map;
|
||||
size_t mapsz;
|
||||
size_t dmphdrsz;
|
||||
Elf64_Ehdr *eh;
|
||||
Elf64_Phdr *ph;
|
||||
};
|
||||
|
||||
static int
|
||||
valid_elf_header(Elf64_Ehdr *eh)
|
||||
{
|
||||
|
||||
if (!IS_ELF(*eh))
|
||||
return (0);
|
||||
if (eh->e_ident[EI_CLASS] != ELFCLASS64)
|
||||
return (0);
|
||||
if (eh->e_ident[EI_DATA] != ELFDATA2MSB)
|
||||
return (0);
|
||||
if (eh->e_ident[EI_VERSION] != EV_CURRENT)
|
||||
return (0);
|
||||
if (eh->e_ident[EI_OSABI] != ELFOSABI_STANDALONE)
|
||||
return (0);
|
||||
if (be16toh(eh->e_type) != ET_CORE)
|
||||
return (0);
|
||||
if (be16toh(eh->e_machine) != EM_PPC64)
|
||||
return (0);
|
||||
/* Can't think of anything else to check... */
|
||||
return (1);
|
||||
}
|
||||
|
||||
static size_t
|
||||
dump_header_size(struct kerneldumpheader *dh)
|
||||
{
|
||||
|
||||
if (strcmp(dh->magic, KERNELDUMPMAGIC) != 0)
|
||||
return (0);
|
||||
if (strcmp(dh->architecture, "powerpc64") != 0)
|
||||
return (0);
|
||||
/* That should do it... */
|
||||
return (sizeof(*dh));
|
||||
}
|
||||
|
||||
/*
|
||||
* Map the ELF headers into the process' address space. We do this in two
|
||||
* steps: first the ELF header itself and using that information the whole
|
||||
* set of headers.
|
||||
*/
|
||||
static int
|
||||
powerpc_maphdrs(kvm_t *kd)
|
||||
{
|
||||
struct vmstate *vm;
|
||||
size_t mapsz;
|
||||
|
||||
vm = kd->vmst;
|
||||
|
||||
vm->mapsz = PAGE_SIZE;
|
||||
vm->map = mmap(NULL, vm->mapsz, PROT_READ, MAP_PRIVATE, kd->pmfd, 0);
|
||||
if (vm->map == MAP_FAILED) {
|
||||
_kvm_err(kd, kd->program, "cannot map corefile");
|
||||
return (-1);
|
||||
}
|
||||
vm->dmphdrsz = 0;
|
||||
vm->eh = vm->map;
|
||||
if (!valid_elf_header(vm->eh)) {
|
||||
/*
|
||||
* Hmmm, no ELF header. Maybe we still have a dump header.
|
||||
* This is normal when the core file wasn't created by
|
||||
* savecore(8), but instead was dumped over TFTP. We can
|
||||
* easily skip the dump header...
|
||||
*/
|
||||
vm->dmphdrsz = dump_header_size(vm->map);
|
||||
if (vm->dmphdrsz == 0)
|
||||
goto inval;
|
||||
vm->eh = (void *)((uintptr_t)vm->map + vm->dmphdrsz);
|
||||
if (!valid_elf_header(vm->eh))
|
||||
goto inval;
|
||||
}
|
||||
mapsz = be16toh(vm->eh->e_phentsize) * be16toh(vm->eh->e_phnum) +
|
||||
be64toh(vm->eh->e_phoff);
|
||||
munmap(vm->map, vm->mapsz);
|
||||
|
||||
/* Map all headers. */
|
||||
vm->mapsz = vm->dmphdrsz + mapsz;
|
||||
vm->map = mmap(NULL, vm->mapsz, PROT_READ, MAP_PRIVATE, kd->pmfd, 0);
|
||||
if (vm->map == MAP_FAILED) {
|
||||
_kvm_err(kd, kd->program, "cannot map corefle headers");
|
||||
return (-1);
|
||||
}
|
||||
vm->eh = (void *)((uintptr_t)vm->map + vm->dmphdrsz);
|
||||
vm->ph = (void *)((uintptr_t)vm->eh + be64toh(vm->eh->e_phoff));
|
||||
return (0);
|
||||
|
||||
inval:
|
||||
munmap(vm->map, vm->mapsz);
|
||||
vm->map = MAP_FAILED;
|
||||
_kvm_err(kd, kd->program, "invalid corefile");
|
||||
return (-1);
|
||||
}
|
||||
|
||||
/*
|
||||
* Determine the offset within the corefile corresponding the virtual
|
||||
* address. Return the number of contiguous bytes in the corefile or
|
||||
* 0 when the virtual address is invalid.
|
||||
*/
|
||||
static size_t
|
||||
powerpc64_va2off(kvm_t *kd, u_long va, off_t *ofs)
|
||||
{
|
||||
struct vmstate *vm = kd->vmst;
|
||||
Elf64_Phdr *ph;
|
||||
int nph;
|
||||
|
||||
ph = vm->ph;
|
||||
nph = be16toh(vm->eh->e_phnum);
|
||||
while (nph && (va < be64toh(ph->p_vaddr) ||
|
||||
va >= be64toh(ph->p_vaddr) + be64toh(ph->p_memsz))) {
|
||||
nph--;
|
||||
ph = (void *)((uintptr_t)ph + be16toh(vm->eh->e_phentsize));
|
||||
}
|
||||
if (nph == 0)
|
||||
return (0);
|
||||
|
||||
/* Segment found. Return file offset and range. */
|
||||
*ofs = vm->dmphdrsz + be64toh(ph->p_offset) +
|
||||
(va - be64toh(ph->p_vaddr));
|
||||
return (be64toh(ph->p_memsz) - (va - be64toh(ph->p_vaddr)));
|
||||
}
|
||||
|
||||
void
|
||||
_kvm_freevtop(kvm_t *kd)
|
||||
{
|
||||
struct vmstate *vm = kd->vmst;
|
||||
|
||||
if (vm == NULL)
|
||||
return;
|
||||
|
||||
if (vm->eh != MAP_FAILED) {
|
||||
munmap(vm->eh, vm->mapsz);
|
||||
vm->eh = MAP_FAILED;
|
||||
}
|
||||
free(vm);
|
||||
kd->vmst = NULL;
|
||||
}
|
||||
|
||||
int
|
||||
_kvm_initvtop(kvm_t *kd)
|
||||
{
|
||||
|
||||
kd->vmst = (struct vmstate *)_kvm_malloc(kd, sizeof(*kd->vmst));
|
||||
if (kd->vmst == NULL) {
|
||||
_kvm_err(kd, kd->program, "out of virtual memory");
|
||||
return (-1);
|
||||
}
|
||||
if (powerpc_maphdrs(kd) == -1) {
|
||||
free(kd->vmst);
|
||||
kd->vmst = NULL;
|
||||
return (-1);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
_kvm_kvatop(kvm_t *kd, u_long va, off_t *ofs)
|
||||
{
|
||||
struct vmstate *vm;
|
||||
|
||||
vm = kd->vmst;
|
||||
if (vm->ph->p_paddr == ~0UL)
|
||||
return ((int)powerpc64_va2off(kd, va, ofs));
|
||||
|
||||
_kvm_err(kd, kd->program, "Raw corefile not supported");
|
||||
return (0);
|
||||
}
|
Loading…
Reference in New Issue
Block a user