a9f56210b8
In particular, - avoid dereferencing NULL pointers - test pointers against NULL, not 0 - test for errout == NULL in the top-level functions (kvm_open, kvm_openfiles, kvm_open2, etc) - Replace a realloc and free on failure with reallocf Found with: devel/cocchinelle Differential Revision: https://reviews.freebsd.org/D5954 MFC after: 1 week Reviewed by: jhb Sponsored by: EMC / Isilon Storage Division
296 lines
7.6 KiB
C
296 lines
7.6 KiB
C
/*-
|
|
* Copyright (c) 2010 Oleksandr Tymoshenko
|
|
* Copyright (c) 2008 Semihalf, Grzegorz Bernacki
|
|
* Copyright (c) 2006 Peter Wemm
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
|
*
|
|
* From: FreeBSD: src/lib/libkvm/kvm_minidump_arm.c r214223
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* MIPS machine dependent routines for kvm and minidumps.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <kvm.h>
|
|
#include <limits.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "../../sys/mips/include/cpuregs.h"
|
|
#include "../../sys/mips/include/minidump.h"
|
|
|
|
#include "kvm_private.h"
|
|
#include "kvm_mips.h"
|
|
|
|
#define mips_round_page(x) roundup2((kvaddr_t)(x), MIPS_PAGE_SIZE)
|
|
|
|
struct vmstate {
|
|
struct minidumphdr hdr;
|
|
struct hpt hpt;
|
|
void *ptemap;
|
|
int pte_size;
|
|
};
|
|
|
|
static int
|
|
_mips_minidump_probe(kvm_t *kd)
|
|
{
|
|
|
|
if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32 &&
|
|
kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
|
|
return (0);
|
|
if (kd->nlehdr.e_machine != EM_MIPS)
|
|
return (0);
|
|
return (_kvm_is_minidump(kd));
|
|
}
|
|
|
|
static void
|
|
_mips_minidump_freevtop(kvm_t *kd)
|
|
{
|
|
struct vmstate *vm = kd->vmst;
|
|
|
|
_kvm_hpt_free(&vm->hpt);
|
|
if (vm->ptemap)
|
|
free(vm->ptemap);
|
|
free(vm);
|
|
kd->vmst = NULL;
|
|
}
|
|
|
|
static int
|
|
_mips_minidump_initvtop(kvm_t *kd)
|
|
{
|
|
struct vmstate *vmst;
|
|
uint32_t *bitmap;
|
|
off_t off;
|
|
|
|
vmst = _kvm_malloc(kd, sizeof(*vmst));
|
|
if (vmst == NULL) {
|
|
_kvm_err(kd, kd->program, "cannot allocate vm");
|
|
return (-1);
|
|
}
|
|
|
|
kd->vmst = vmst;
|
|
|
|
if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64 ||
|
|
kd->nlehdr.e_flags & EF_MIPS_ABI2)
|
|
vmst->pte_size = 64;
|
|
else
|
|
vmst->pte_size = 32;
|
|
|
|
if (pread(kd->pmfd, &vmst->hdr,
|
|
sizeof(vmst->hdr), 0) != sizeof(vmst->hdr)) {
|
|
_kvm_err(kd, kd->program, "cannot read dump header");
|
|
return (-1);
|
|
}
|
|
|
|
if (strncmp(MINIDUMP_MAGIC, vmst->hdr.magic,
|
|
sizeof(vmst->hdr.magic)) != 0) {
|
|
_kvm_err(kd, kd->program, "not a minidump for this platform");
|
|
return (-1);
|
|
}
|
|
vmst->hdr.version = _kvm32toh(kd, vmst->hdr.version);
|
|
if (vmst->hdr.version != MINIDUMP_VERSION) {
|
|
_kvm_err(kd, kd->program, "wrong minidump version. "
|
|
"Expected %d got %d", MINIDUMP_VERSION, vmst->hdr.version);
|
|
return (-1);
|
|
}
|
|
vmst->hdr.msgbufsize = _kvm32toh(kd, vmst->hdr.msgbufsize);
|
|
vmst->hdr.bitmapsize = _kvm32toh(kd, vmst->hdr.bitmapsize);
|
|
vmst->hdr.ptesize = _kvm32toh(kd, vmst->hdr.ptesize);
|
|
vmst->hdr.kernbase = _kvm64toh(kd, vmst->hdr.kernbase);
|
|
vmst->hdr.dmapbase = _kvm64toh(kd, vmst->hdr.dmapbase);
|
|
vmst->hdr.dmapend = _kvm64toh(kd, vmst->hdr.dmapend);
|
|
|
|
/* Skip header and msgbuf */
|
|
off = MIPS_PAGE_SIZE + mips_round_page(vmst->hdr.msgbufsize);
|
|
|
|
bitmap = _kvm_malloc(kd, vmst->hdr.bitmapsize);
|
|
if (bitmap == NULL) {
|
|
_kvm_err(kd, kd->program, "cannot allocate %d bytes for "
|
|
"bitmap", vmst->hdr.bitmapsize);
|
|
return (-1);
|
|
}
|
|
|
|
if (pread(kd->pmfd, bitmap, vmst->hdr.bitmapsize, off) !=
|
|
(ssize_t)vmst->hdr.bitmapsize) {
|
|
_kvm_err(kd, kd->program, "cannot read %d bytes for page bitmap",
|
|
vmst->hdr.bitmapsize);
|
|
free(bitmap);
|
|
return (-1);
|
|
}
|
|
off += mips_round_page(vmst->hdr.bitmapsize);
|
|
|
|
vmst->ptemap = _kvm_malloc(kd, vmst->hdr.ptesize);
|
|
if (vmst->ptemap == NULL) {
|
|
_kvm_err(kd, kd->program, "cannot allocate %d bytes for "
|
|
"ptemap", vmst->hdr.ptesize);
|
|
free(bitmap);
|
|
return (-1);
|
|
}
|
|
|
|
if (pread(kd->pmfd, vmst->ptemap, vmst->hdr.ptesize, off) !=
|
|
(ssize_t)vmst->hdr.ptesize) {
|
|
_kvm_err(kd, kd->program, "cannot read %d bytes for ptemap",
|
|
vmst->hdr.ptesize);
|
|
free(bitmap);
|
|
return (-1);
|
|
}
|
|
|
|
off += vmst->hdr.ptesize;
|
|
|
|
/* Build physical address hash table for sparse pages */
|
|
_kvm_hpt_init(kd, &vmst->hpt, bitmap, vmst->hdr.bitmapsize, off,
|
|
MIPS_PAGE_SIZE, sizeof(*bitmap));
|
|
free(bitmap);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
_mips_minidump_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
|
|
{
|
|
struct vmstate *vm;
|
|
uint64_t pte;
|
|
mips_physaddr_t offset, a;
|
|
kvaddr_t pteindex;
|
|
off_t ofs;
|
|
uint32_t *ptemap32;
|
|
uint64_t *ptemap64;
|
|
|
|
if (ISALIVE(kd)) {
|
|
_kvm_err(kd, 0, "_mips_minidump_kvatop called in live kernel!");
|
|
return (0);
|
|
}
|
|
|
|
offset = va & MIPS_PAGE_MASK;
|
|
/* Operate with page-aligned address */
|
|
va &= ~MIPS_PAGE_MASK;
|
|
|
|
vm = kd->vmst;
|
|
ptemap32 = vm->ptemap;
|
|
ptemap64 = vm->ptemap;
|
|
|
|
if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
|
|
if (va >= MIPS_XKPHYS_START && va < MIPS_XKPHYS_END) {
|
|
a = va & MIPS_XKPHYS_PHYS_MASK;
|
|
goto found;
|
|
}
|
|
if (va >= MIPS64_KSEG0_START && va < MIPS64_KSEG0_END) {
|
|
a = va & MIPS_KSEG0_PHYS_MASK;
|
|
goto found;
|
|
}
|
|
if (va >= MIPS64_KSEG1_START && va < MIPS64_KSEG1_END) {
|
|
a = va & MIPS_KSEG0_PHYS_MASK;
|
|
goto found;
|
|
}
|
|
} else {
|
|
if (va >= MIPS32_KSEG0_START && va < MIPS32_KSEG0_END) {
|
|
a = va & MIPS_KSEG0_PHYS_MASK;
|
|
goto found;
|
|
}
|
|
if (va >= MIPS32_KSEG1_START && va < MIPS32_KSEG1_END) {
|
|
a = va & MIPS_KSEG0_PHYS_MASK;
|
|
goto found;
|
|
}
|
|
}
|
|
if (va >= vm->hdr.kernbase) {
|
|
pteindex = (va - vm->hdr.kernbase) >> MIPS_PAGE_SHIFT;
|
|
if (vm->pte_size == 64) {
|
|
pte = _kvm64toh(kd, ptemap64[pteindex]);
|
|
a = MIPS64_PTE_TO_PA(pte);
|
|
} else {
|
|
pte = _kvm32toh(kd, ptemap32[pteindex]);
|
|
a = MIPS32_PTE_TO_PA(pte);
|
|
}
|
|
if (!pte) {
|
|
_kvm_err(kd, kd->program, "_mips_minidump_kvatop: pte "
|
|
"not valid");
|
|
goto invalid;
|
|
}
|
|
} else {
|
|
_kvm_err(kd, kd->program, "_mips_minidump_kvatop: virtual "
|
|
"address 0x%jx not minidumped", (uintmax_t)va);
|
|
return (0);
|
|
}
|
|
|
|
found:
|
|
ofs = _kvm_hpt_find(&vm->hpt, a);
|
|
if (ofs == -1) {
|
|
_kvm_err(kd, kd->program, "_mips_minidump_kvatop: physical "
|
|
"address 0x%jx not in minidump", (uintmax_t)a);
|
|
goto invalid;
|
|
}
|
|
|
|
*pa = ofs + offset;
|
|
return (MIPS_PAGE_SIZE - offset);
|
|
|
|
|
|
invalid:
|
|
_kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
_mips_native(kvm_t *kd)
|
|
{
|
|
|
|
#ifdef __mips__
|
|
#ifdef __mips_n64
|
|
if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
|
|
return (0);
|
|
#else
|
|
if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32)
|
|
return (0);
|
|
#ifdef __mips_n32
|
|
if (!(kd->nlehdr.e_flags & EF_MIPS_ABI2))
|
|
return (0);
|
|
#else
|
|
if (kd->nlehdr.e_flags & EF_MIPS_ABI2)
|
|
return (0);
|
|
#endif
|
|
#endif
|
|
#if _BYTE_ORDER == _LITTLE_ENDIAN
|
|
return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB);
|
|
#else
|
|
return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2MSB);
|
|
#endif
|
|
#else
|
|
return (0);
|
|
#endif
|
|
}
|
|
|
|
struct kvm_arch kvm_mips_minidump = {
|
|
.ka_probe = _mips_minidump_probe,
|
|
.ka_initvtop = _mips_minidump_initvtop,
|
|
.ka_freevtop = _mips_minidump_freevtop,
|
|
.ka_kvatop = _mips_minidump_kvatop,
|
|
.ka_native = _mips_native,
|
|
};
|
|
|
|
KVM_ARCH(kvm_mips_minidump);
|