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crash/netdump.c
Dave Anderson 8bff022b52 Fix for Linux 3.11 and later ARM kernels, in which all non-panicking 
cpus offline themselves during a kdump procedure.  This causes an
invalid cpu count determination during crash session initialization
from an ARM vmcore.  The patch utilizes the cpu count found in the
cpu_active_map if it is greater than the count in the cpu_online_map.
In addition, the maximum NR_CPUS value for the ARM architecture has
been raised from 4 to 32.
(sdu.liu@huawei.com)
2014-04-28 15:45:51 -04:00

4076 lines
109 KiB
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/* netdump.c
*
* Copyright (C) 2002-2014 David Anderson
* Copyright (C) 2002-2014 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Author: David Anderson
*/
#define _LARGEFILE64_SOURCE 1 /* stat64() */
#include "defs.h"
#include "netdump.h"
#include "sadump.h"
static struct vmcore_data vmcore_data = { 0 };
static struct vmcore_data *nd = &vmcore_data;
static struct xen_kdump_data xen_kdump_data = { 0 };
static struct proc_kcore_data proc_kcore_data = { 0 };
static struct proc_kcore_data *pkd = &proc_kcore_data;
static void netdump_print(char *, ...);
static void dump_Elf32_Ehdr(Elf32_Ehdr *);
static void dump_Elf32_Phdr(Elf32_Phdr *, int);
static size_t dump_Elf32_Nhdr(Elf32_Off offset, int);
static void dump_Elf64_Ehdr(Elf64_Ehdr *);
static void dump_Elf64_Phdr(Elf64_Phdr *, int);
static size_t dump_Elf64_Nhdr(Elf64_Off offset, int);
static void get_netdump_regs_ppc(struct bt_info *, ulong *, ulong *);
static void get_netdump_regs_ppc64(struct bt_info *, ulong *, ulong *);
static void get_netdump_regs_arm(struct bt_info *, ulong *, ulong *);
static void get_netdump_regs_arm64(struct bt_info *, ulong *, ulong *);
static physaddr_t xen_kdump_p2m(physaddr_t);
static void check_dumpfile_size(char *);
static int proc_kcore_init_32(FILE *fp);
static int proc_kcore_init_64(FILE *fp);
static char *get_regs_from_note(char *, ulong *, ulong *);
static void kdump_get_osrelease(void);
static char *vmcoreinfo_read_string(const char *);
#define ELFSTORE 1
#define ELFREAD 0
#define MIN_PAGE_SIZE (4096)
/*
* Architectures that have configurable page sizes,
* can differ from the host machine's page size.
*/
#define READ_PAGESIZE_FROM_VMCOREINFO() \
(machine_type("IA64") || machine_type("PPC64") || machine_type("PPC") || machine_type("ARM64"))
/*
* kdump installs NT_PRSTATUS elf notes only to the cpus
* that were online during dumping. Hence we call into
* this function after reading the cpu map from the kernel,
* to remap the NT_PRSTATUS notes only to the online cpus.
*/
void
map_cpus_to_prstatus(void)
{
void **nt_ptr;
int online, i, j, nrcpus;
size_t size;
if (!(online = get_cpus_online()) || (online == kt->cpus))
return;
if (CRASHDEBUG(1))
error(INFO,
"cpus: %d online: %d NT_PRSTATUS notes: %d (remapping)\n",
kt->cpus, online, nd->num_prstatus_notes);
size = NR_CPUS * sizeof(void *);
nt_ptr = (void **)GETBUF(size);
BCOPY(nd->nt_prstatus_percpu, nt_ptr, size);
BZERO(nd->nt_prstatus_percpu, size);
/*
* Re-populate the array with the notes mapping to online cpus
*/
nrcpus = (kt->kernel_NR_CPUS ? kt->kernel_NR_CPUS : NR_CPUS);
for (i = 0, j = 0; i < nrcpus; i++) {
if (in_cpu_map(ONLINE_MAP, i))
nd->nt_prstatus_percpu[i] = nt_ptr[j++];
}
FREEBUF(nt_ptr);
}
/*
* Determine whether a file is a netdump/diskdump/kdump creation,
* and if TRUE, initialize the vmcore_data structure.
*/
int
is_netdump(char *file, ulong source_query)
{
int i, fd, swap;
Elf32_Ehdr *elf32;
Elf32_Phdr *load32;
Elf64_Ehdr *elf64;
Elf64_Phdr *load64;
char eheader[MIN_NETDUMP_ELF_HEADER_SIZE];
char buf[BUFSIZE];
size_t size, len, tot;
Elf32_Off offset32;
Elf64_Off offset64;
ulong tmp_flags;
char *tmp_elf_header;
if ((fd = open(file, O_RDWR)) < 0) {
if ((fd = open(file, O_RDONLY)) < 0) {
sprintf(buf, "%s: open", file);
perror(buf);
return FALSE;
}
}
size = MIN_NETDUMP_ELF_HEADER_SIZE;
if (FLAT_FORMAT()) {
if (!read_flattened_format(fd, 0, eheader, size))
goto bailout;
} else {
if (read(fd, eheader, size) != size) {
sprintf(buf, "%s: read", file);
perror(buf);
goto bailout;
}
}
load32 = NULL;
load64 = NULL;
tmp_flags = 0;
elf32 = (Elf32_Ehdr *)&eheader[0];
elf64 = (Elf64_Ehdr *)&eheader[0];
/*
* Verify the ELF header, and determine the dumpfile format.
*
* For now, kdump vmcores differ from netdump/diskdump like so:
*
* 1. The first kdump PT_LOAD segment is packed just after
* the ELF header, whereas netdump/diskdump page-align
* the first PT_LOAD segment.
* 2. Each kdump PT_LOAD segment has a p_align field of zero,
* whereas netdump/diskdump have their p_align fields set
* to the system page-size.
*
* If either kdump difference is seen, presume kdump -- this
* is obviously subject to change.
*/
if (!STRNEQ(eheader, ELFMAG) || eheader[EI_VERSION] != EV_CURRENT)
goto bailout;
swap = (((eheader[EI_DATA] == ELFDATA2LSB) &&
(__BYTE_ORDER == __BIG_ENDIAN)) ||
((eheader[EI_DATA] == ELFDATA2MSB) &&
(__BYTE_ORDER == __LITTLE_ENDIAN)));
if ((elf32->e_ident[EI_CLASS] == ELFCLASS32) &&
(swap16(elf32->e_type, swap) == ET_CORE) &&
(swap32(elf32->e_version, swap) == EV_CURRENT) &&
(swap16(elf32->e_phnum, swap) >= 2)) {
switch (swap16(elf32->e_machine, swap))
{
case EM_386:
if (machine_type_mismatch(file, "X86", NULL,
source_query))
goto bailout;
break;
case EM_ARM:
if (machine_type_mismatch(file, "ARM", NULL,
source_query))
goto bailout;
break;
case EM_PPC:
if (machine_type_mismatch(file, "PPC", NULL,
source_query))
goto bailout;
break;
default:
if (machine_type_mismatch(file, "(unknown)", NULL,
source_query))
goto bailout;
}
if (endian_mismatch(file, elf32->e_ident[EI_DATA],
source_query))
goto bailout;
load32 = (Elf32_Phdr *)
&eheader[sizeof(Elf32_Ehdr)+sizeof(Elf32_Phdr)];
size = (size_t)load32->p_offset;
if ((load32->p_offset & (MIN_PAGE_SIZE-1)) ||
(load32->p_align == 0))
tmp_flags |= KDUMP_ELF32;
else
tmp_flags |= NETDUMP_ELF32;
} else if ((elf64->e_ident[EI_CLASS] == ELFCLASS64) &&
(swap16(elf64->e_type, swap) == ET_CORE) &&
(swap32(elf64->e_version, swap) == EV_CURRENT) &&
(swap16(elf64->e_phnum, swap) >= 2)) {
switch (swap16(elf64->e_machine, swap))
{
case EM_IA_64:
if (machine_type_mismatch(file, "IA64", NULL,
source_query))
goto bailout;
break;
case EM_PPC64:
if (machine_type_mismatch(file, "PPC64", NULL,
source_query))
goto bailout;
break;
case EM_X86_64:
if (machine_type_mismatch(file, "X86_64", NULL,
source_query))
goto bailout;
break;
case EM_S390:
if (machine_type_mismatch(file, "S390X", NULL,
source_query))
goto bailout;
break;
case EM_386:
if (machine_type_mismatch(file, "X86", NULL,
source_query))
goto bailout;
break;
case EM_AARCH64:
if (machine_type_mismatch(file, "ARM64", NULL,
source_query))
goto bailout;
break;
default:
if (machine_type_mismatch(file, "(unknown)", NULL,
source_query))
goto bailout;
}
if (endian_mismatch(file, elf64->e_ident[EI_DATA],
source_query))
goto bailout;
load64 = (Elf64_Phdr *)
&eheader[sizeof(Elf64_Ehdr)+sizeof(Elf64_Phdr)];
size = (size_t)load64->p_offset;
if ((load64->p_offset & (MIN_PAGE_SIZE-1)) ||
(load64->p_align == 0))
tmp_flags |= KDUMP_ELF64;
else
tmp_flags |= NETDUMP_ELF64;
} else {
if (CRASHDEBUG(2))
error(INFO, "%s: not a %s ELF dumpfile\n",
file, source_query == NETDUMP_LOCAL ?
"netdump" : "kdump");
goto bailout;
}
if (source_query == KCORE_LOCAL) {
close(fd);
return TRUE;
}
switch (DUMPFILE_FORMAT(tmp_flags))
{
case NETDUMP_ELF32:
case NETDUMP_ELF64:
if (source_query & (NETDUMP_LOCAL|NETDUMP_REMOTE))
break;
else
goto bailout;
case KDUMP_ELF32:
case KDUMP_ELF64:
if (source_query & KDUMP_LOCAL)
break;
else
goto bailout;
}
if ((tmp_elf_header = (char *)malloc(size)) == NULL) {
fprintf(stderr, "cannot malloc ELF header buffer\n");
clean_exit(1);
}
if (FLAT_FORMAT()) {
if (!read_flattened_format(fd, 0, tmp_elf_header, size)) {
free(tmp_elf_header);
goto bailout;
}
} else {
if (lseek(fd, 0, SEEK_SET) != 0) {
sprintf(buf, "%s: lseek", file);
perror(buf);
goto bailout;
}
if (read(fd, tmp_elf_header, size) != size) {
sprintf(buf, "%s: read", file);
perror(buf);
free(tmp_elf_header);
goto bailout;
}
}
nd->ndfd = fd;
nd->elf_header = tmp_elf_header;
nd->flags = tmp_flags;
nd->flags |= source_query;
switch (DUMPFILE_FORMAT(nd->flags))
{
case NETDUMP_ELF32:
case KDUMP_ELF32:
nd->header_size = load32->p_offset;
nd->elf32 = (Elf32_Ehdr *)&nd->elf_header[0];
nd->num_pt_load_segments = nd->elf32->e_phnum - 1;
if ((nd->pt_load_segments = (struct pt_load_segment *)
malloc(sizeof(struct pt_load_segment) *
nd->num_pt_load_segments)) == NULL) {
fprintf(stderr, "cannot malloc PT_LOAD segment buffers\n");
clean_exit(1);
}
nd->notes32 = (Elf32_Phdr *)
&nd->elf_header[sizeof(Elf32_Ehdr)];
nd->load32 = (Elf32_Phdr *)
&nd->elf_header[sizeof(Elf32_Ehdr)+sizeof(Elf32_Phdr)];
if (DUMPFILE_FORMAT(nd->flags) == NETDUMP_ELF32)
nd->page_size = (uint)nd->load32->p_align;
dump_Elf32_Ehdr(nd->elf32);
dump_Elf32_Phdr(nd->notes32, ELFREAD);
for (i = 0; i < nd->num_pt_load_segments; i++)
dump_Elf32_Phdr(nd->load32 + i, ELFSTORE+i);
offset32 = nd->notes32->p_offset;
for (tot = 0; tot < nd->notes32->p_filesz; tot += len) {
if (!(len = dump_Elf32_Nhdr(offset32, ELFSTORE)))
break;
offset32 += len;
}
break;
case NETDUMP_ELF64:
case KDUMP_ELF64:
nd->header_size = load64->p_offset;
nd->elf64 = (Elf64_Ehdr *)&nd->elf_header[0];
nd->num_pt_load_segments = nd->elf64->e_phnum - 1;
if ((nd->pt_load_segments = (struct pt_load_segment *)
malloc(sizeof(struct pt_load_segment) *
nd->num_pt_load_segments)) == NULL) {
fprintf(stderr, "cannot malloc PT_LOAD segment buffers\n");
clean_exit(1);
}
nd->notes64 = (Elf64_Phdr *)
&nd->elf_header[sizeof(Elf64_Ehdr)];
nd->load64 = (Elf64_Phdr *)
&nd->elf_header[sizeof(Elf64_Ehdr)+sizeof(Elf64_Phdr)];
if (DUMPFILE_FORMAT(nd->flags) == NETDUMP_ELF64)
nd->page_size = (uint)nd->load64->p_align;
dump_Elf64_Ehdr(nd->elf64);
dump_Elf64_Phdr(nd->notes64, ELFREAD);
for (i = 0; i < nd->num_pt_load_segments; i++)
dump_Elf64_Phdr(nd->load64 + i, ELFSTORE+i);
offset64 = nd->notes64->p_offset;
for (tot = 0; tot < nd->notes64->p_filesz; tot += len) {
if (!(len = dump_Elf64_Nhdr(offset64, ELFSTORE)))
break;
offset64 += len;
}
break;
}
if (CRASHDEBUG(1))
netdump_memory_dump(fp);
pc->read_vmcoreinfo = vmcoreinfo_read_string;
if ((source_query == KDUMP_LOCAL) &&
(pc->flags2 & GET_OSRELEASE))
kdump_get_osrelease();
if ((source_query == KDUMP_LOCAL) &&
(pc->flags2 & GET_LOG)) {
pc->dfd = nd->ndfd;
pc->readmem = read_kdump;
nd->flags |= KDUMP_LOCAL;
pc->flags |= KDUMP;
get_log_from_vmcoreinfo(file);
}
return nd->header_size;
bailout:
close(fd);
return FALSE;
}
/*
* Return the e_version number of an ELF file
* (or -1 if its not readable ELF file)
*/
int
file_elf_version(char *file)
{
int fd, size;
Elf32_Ehdr *elf32;
Elf64_Ehdr *elf64;
char header[MIN_NETDUMP_ELF_HEADER_SIZE];
char buf[BUFSIZE];
if ((fd = open(file, O_RDONLY)) < 0) {
sprintf(buf, "%s: open", file);
perror(buf);
return -1;
}
size = MIN_NETDUMP_ELF_HEADER_SIZE;
if (read(fd, header, size) != size) {
sprintf(buf, "%s: read", file);
perror(buf);
close(fd);
return -1;
}
close(fd);
elf32 = (Elf32_Ehdr *)&header[0];
elf64 = (Elf64_Ehdr *)&header[0];
if (STRNEQ(elf32->e_ident, ELFMAG) &&
(elf32->e_ident[EI_CLASS] == ELFCLASS32) &&
(elf32->e_ident[EI_DATA] == ELFDATA2LSB) &&
(elf32->e_ident[EI_VERSION] == EV_CURRENT)) {
return (elf32->e_version);
} else if (STRNEQ(elf64->e_ident, ELFMAG) &&
(elf64->e_ident[EI_CLASS] == ELFCLASS64) &&
(elf64->e_ident[EI_VERSION] == EV_CURRENT)) {
return (elf64->e_version);
}
return -1;
}
/*
* Check whether any PT_LOAD segment goes beyond the file size.
*/
static void
check_dumpfile_size(char *file)
{
int i;
struct stat64 stat;
struct pt_load_segment *pls;
uint64_t segment_end;
if (stat64(file, &stat) < 0)
return;
for (i = 0; i < nd->num_pt_load_segments; i++) {
pls = &nd->pt_load_segments[i];
segment_end = pls->file_offset +
(pls->phys_end - pls->phys_start);
if (segment_end > stat.st_size) {
error(WARNING, "%s: may be truncated or incomplete\n"
" PT_LOAD p_offset: %lld\n"
" p_filesz: %lld\n"
" bytes required: %lld\n"
" dumpfile size: %lld\n\n",
file, pls->file_offset,
pls->phys_end - pls->phys_start,
segment_end, stat.st_size);
return;
}
}
}
/*
* Perform any post-dumpfile determination stuff here.
*/
int
netdump_init(char *unused, FILE *fptr)
{
if (!VMCORE_VALID())
return FALSE;
nd->ofp = fptr;
check_dumpfile_size(pc->dumpfile);
return TRUE;
}
/*
* Read from a netdump-created dumpfile.
*/
int
read_netdump(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
off_t offset;
struct pt_load_segment *pls;
int i;
offset = 0;
/*
* The Elf32_Phdr has 32-bit fields for p_paddr, p_filesz and
* p_memsz, so for now, multiple PT_LOAD segment support is
* restricted to 64-bit machines for netdump/diskdump vmcores.
* However, kexec/kdump has introduced the optional use of a
* 64-bit ELF header for 32-bit processors.
*/
switch (DUMPFILE_FORMAT(nd->flags))
{
case NETDUMP_ELF32:
offset = (off_t)paddr + (off_t)nd->header_size;
break;
case NETDUMP_ELF64:
case KDUMP_ELF32:
case KDUMP_ELF64:
if (nd->num_pt_load_segments == 1) {
offset = (off_t)paddr + (off_t)nd->header_size -
(off_t)nd->pt_load_segments[0].phys_start;
break;
}
for (i = offset = 0; i < nd->num_pt_load_segments; i++) {
pls = &nd->pt_load_segments[i];
if ((paddr >= pls->phys_start) &&
(paddr < pls->phys_end)) {
offset = (off_t)(paddr - pls->phys_start) +
pls->file_offset;
break;
}
if (pls->zero_fill && (paddr >= pls->phys_end) &&
(paddr < pls->zero_fill)) {
memset(bufptr, 0, cnt);
if (CRASHDEBUG(8))
fprintf(fp, "read_netdump: zero-fill: "
"addr: %lx paddr: %llx cnt: %d\n",
addr, (ulonglong)paddr, cnt);
return cnt;
}
}
if (!offset) {
if (CRASHDEBUG(8))
fprintf(fp, "read_netdump: READ_ERROR: "
"offset not found for paddr: %llx\n",
(ulonglong)paddr);
return READ_ERROR;
}
break;
}
if (CRASHDEBUG(8))
fprintf(fp, "read_netdump: addr: %lx paddr: %llx cnt: %d offset: %llx\n",
addr, (ulonglong)paddr, cnt, (ulonglong)offset);
if (FLAT_FORMAT()) {
if (!read_flattened_format(nd->ndfd, offset, bufptr, cnt)) {
if (CRASHDEBUG(8))
fprintf(fp, "read_netdump: READ_ERROR: "
"read_flattened_format failed for offset:"
" %llx\n",
(ulonglong)offset);
return READ_ERROR;
}
} else {
if (lseek(nd->ndfd, offset, SEEK_SET) == -1) {
if (CRASHDEBUG(8))
fprintf(fp, "read_netdump: SEEK_ERROR: "
"offset: %llx\n", (ulonglong)offset);
return SEEK_ERROR;
}
if (read(nd->ndfd, bufptr, cnt) != cnt) {
if (CRASHDEBUG(8))
fprintf(fp, "read_netdump: READ_ERROR: "
"offset: %llx\n", (ulonglong)offset);
return READ_ERROR;
}
}
return cnt;
}
/*
* Write to a netdump-created dumpfile. Note that cmd_wr() does not
* allow writes to dumpfiles, so you can't get here from there.
* But, if it would ever be helpful, here it is...
*/
int
write_netdump(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
off_t offset;
struct pt_load_segment *pls;
int i;
offset = 0;
switch (DUMPFILE_FORMAT(nd->flags))
{
case NETDUMP_ELF32:
offset = (off_t)paddr + (off_t)nd->header_size;
break;
case NETDUMP_ELF64:
case KDUMP_ELF32:
case KDUMP_ELF64:
if (nd->num_pt_load_segments == 1) {
offset = (off_t)paddr + (off_t)nd->header_size;
break;
}
for (i = offset = 0; i < nd->num_pt_load_segments; i++) {
pls = &nd->pt_load_segments[i];
if ((paddr >= pls->phys_start) &&
(paddr < pls->phys_end)) {
offset = (off_t)(paddr - pls->phys_start) +
pls->file_offset;
break;
}
}
if (!offset)
return READ_ERROR;
break;
}
if (lseek(nd->ndfd, offset, SEEK_SET) == -1)
return SEEK_ERROR;
if (write(nd->ndfd, bufptr, cnt) != cnt)
return READ_ERROR;
return cnt;
}
/*
* Set the file pointer for debug output.
*/
FILE *
set_netdump_fp(FILE *fp)
{
if (!VMCORE_VALID())
return NULL;
nd->ofp = fp;
return fp;
}
/*
* Generic print routine to handle integral and remote daemon output.
*/
static void
netdump_print(char *fmt, ...)
{
char buf[BUFSIZE];
va_list ap;
if (!fmt || !strlen(fmt) || !VMCORE_VALID())
return;
va_start(ap, fmt);
(void)vsnprintf(buf, BUFSIZE, fmt, ap);
va_end(ap);
if (nd->ofp)
fprintf(nd->ofp, "%s", buf);
else
console(buf);
}
uint
netdump_page_size(void)
{
if (!VMCORE_VALID())
return 0;
return nd->page_size;
}
int
netdump_free_memory(void)
{
return (VMCORE_VALID() ? 0 : 0);
}
int netdump_memory_used(void)
{
return (VMCORE_VALID() ? 0 : 0);
}
/*
* The netdump server will eventually use the NT_TASKSTRUCT section
* to pass the task address. Until such time, look at the ebp of the
* user_regs_struct, which is located at the end of the NT_PRSTATUS
* elf_prstatus structure, minus one integer:
*
* struct elf_prstatus
* {
* ...
* elf_gregset_t pr_reg; (maps to user_regs_struct)
* int pr_fpvalid;
* };
*
* If it's a kernel stack address who's adjusted task_struct value is
* equal to one of the active set tasks, we'll presume it's legit.
*
*/
ulong
get_netdump_panic_task(void)
{
#ifdef DAEMON
return nd->task_struct;
#else
int i, crashing_cpu;
size_t len;
char *user_regs;
ulong ebp, esp, task;
if (!VMCORE_VALID() || !get_active_set())
goto panic_task_undetermined;
if (nd->task_struct) {
if (CRASHDEBUG(1))
error(INFO,
"get_netdump_panic_task: NT_TASKSTRUCT: %lx\n",
nd->task_struct);
return nd->task_struct;
}
switch (DUMPFILE_FORMAT(nd->flags))
{
case NETDUMP_ELF32:
case NETDUMP_ELF64:
crashing_cpu = -1;
break;
case KDUMP_ELF32:
case KDUMP_ELF64:
crashing_cpu = -1;
if (kernel_symbol_exists("crashing_cpu")) {
get_symbol_data("crashing_cpu", sizeof(int), &i);
if ((i >= 0) && in_cpu_map(ONLINE_MAP, i)) {
crashing_cpu = i;
if (CRASHDEBUG(1))
error(INFO,
"get_netdump_panic_task: active_set[crashing_cpu: %d]: %lx\n",
crashing_cpu,
tt->active_set[crashing_cpu]);
}
}
if ((nd->num_prstatus_notes > 1) && (crashing_cpu == -1))
goto panic_task_undetermined;
break;
default:
crashing_cpu = -1;
break;
}
if (nd->elf32 && (nd->elf32->e_machine == EM_386)) {
Elf32_Nhdr *note32 = NULL;
if (nd->num_prstatus_notes > 1) {
if (crashing_cpu != -1)
note32 = (Elf32_Nhdr *)
nd->nt_prstatus_percpu[crashing_cpu];
} else
note32 = (Elf32_Nhdr *)nd->nt_prstatus;
if (!note32)
goto panic_task_undetermined;
len = sizeof(Elf32_Nhdr);
len = roundup(len + note32->n_namesz, 4);
len = roundup(len + note32->n_descsz, 4);
user_regs = ((char *)note32 + len)
- SIZE(user_regs_struct) - sizeof(int);
ebp = ULONG(user_regs + OFFSET(user_regs_struct_ebp));
esp = ULONG(user_regs + OFFSET(user_regs_struct_esp));
check_ebp_esp:
if (CRASHDEBUG(1))
error(INFO,
"get_netdump_panic_task: NT_PRSTATUS esp: %lx ebp: %lx\n",
esp, ebp);
if (IS_KVADDR(esp)) {
task = stkptr_to_task(esp);
if (CRASHDEBUG(1))
error(INFO,
"get_netdump_panic_task: esp: %lx -> task: %lx\n",
esp, task);
for (i = 0; task && (i < NR_CPUS); i++) {
if (task == tt->active_set[i])
return task;
}
}
if (IS_KVADDR(ebp)) {
task = stkptr_to_task(ebp);
if (CRASHDEBUG(1))
error(INFO,
"get_netdump_panic_task: ebp: %lx -> task: %lx\n",
ebp, task);
for (i = 0; task && (i < NR_CPUS); i++) {
if (task == tt->active_set[i])
return task;
}
}
} else if (nd->elf64) {
Elf64_Nhdr *note64 = NULL;
if (nd->num_prstatus_notes > 1) {
if (crashing_cpu != -1)
note64 = (Elf64_Nhdr *)
nd->nt_prstatus_percpu[crashing_cpu];
} else
note64 = (Elf64_Nhdr *)nd->nt_prstatus;
if (!note64)
goto panic_task_undetermined;
len = sizeof(Elf64_Nhdr);
len = roundup(len + note64->n_namesz, 4);
user_regs = (char *)((char *)note64 + len +
MEMBER_OFFSET("elf_prstatus", "pr_reg"));
if (nd->elf64->e_machine == EM_386) {
ebp = ULONG(user_regs + OFFSET(user_regs_struct_ebp));
esp = ULONG(user_regs + OFFSET(user_regs_struct_esp));
goto check_ebp_esp;
}
if (nd->elf64->e_machine == EM_PPC64) {
/*
* Get the GPR1 register value.
*/
esp = *(ulong *)((char *)user_regs + 8);
if (CRASHDEBUG(1))
error(INFO,
"get_netdump_panic_task: NT_PRSTATUS esp: %lx\n", esp);
if (IS_KVADDR(esp)) {
task = stkptr_to_task(esp);
if (CRASHDEBUG(1))
error(INFO,
"get_netdump_panic_task: esp: %lx -> task: %lx\n",
esp, task);
for (i = 0; task && (i < NR_CPUS); i++) {
if (task == tt->active_set[i])
return task;
}
}
}
if (nd->elf64->e_machine == EM_X86_64) {
if ((crashing_cpu != -1) && (crashing_cpu <= kt->cpus))
return (tt->active_set[crashing_cpu]);
}
}
panic_task_undetermined:
if (CRASHDEBUG(1))
error(INFO, "get_netdump_panic_task: failed\n");
return NO_TASK;
#endif
}
/*
* Get the switch_stack address of the passed-in task. Currently only
* the panicking task reports its switch-stack address.
*/
ulong
get_netdump_switch_stack(ulong task)
{
#ifdef DAEMON
if (nd->task_struct == task)
return nd->switch_stack;
return 0;
#else
if (!VMCORE_VALID() || !get_active_set())
return 0;
if (nd->task_struct == task)
return nd->switch_stack;
return 0;
#endif
}
int
netdump_memory_dump(FILE *fp)
{
int i, others, wrap, flen;
size_t len, tot;
FILE *fpsave;
Elf32_Off offset32;
Elf32_Off offset64;
struct pt_load_segment *pls;
if (!VMCORE_VALID())
return FALSE;
fpsave = nd->ofp;
nd->ofp = fp;
if (FLAT_FORMAT())
dump_flat_header(nd->ofp);
netdump_print("vmcore_data: \n");
netdump_print(" flags: %lx (", nd->flags);
others = 0;
if (nd->flags & NETDUMP_LOCAL)
netdump_print("%sNETDUMP_LOCAL", others++ ? "|" : "");
if (nd->flags & KDUMP_LOCAL)
netdump_print("%sKDUMP_LOCAL", others++ ? "|" : "");
if (nd->flags & NETDUMP_REMOTE)
netdump_print("%sNETDUMP_REMOTE", others++ ? "|" : "");
if (nd->flags & NETDUMP_ELF32)
netdump_print("%sNETDUMP_ELF32", others++ ? "|" : "");
if (nd->flags & NETDUMP_ELF64)
netdump_print("%sNETDUMP_ELF64", others++ ? "|" : "");
if (nd->flags & KDUMP_ELF32)
netdump_print("%sKDUMP_ELF32", others++ ? "|" : "");
if (nd->flags & KDUMP_ELF64)
netdump_print("%sKDUMP_ELF64", others++ ? "|" : "");
if (nd->flags & PARTIAL_DUMP)
netdump_print("%sPARTIAL_DUMP", others++ ? "|" : "");
if (nd->flags & QEMU_MEM_DUMP_KDUMP_BACKUP)
netdump_print("%sQEMU_MEM_DUMP_KDUMP_BACKUP", others++ ? "|" : "");
netdump_print(") %s\n", FLAT_FORMAT() ? "[FLAT]" : "");
if ((pc->flags & RUNTIME) && symbol_exists("dump_level")) {
int dump_level;
if (readmem(symbol_value("dump_level"), KVADDR, &dump_level,
sizeof(dump_level), "dump_level", QUIET|RETURN_ON_ERROR)) {
netdump_print(" dump_level: %d (0x%x) %s",
dump_level, dump_level,
dump_level > 0 ? "(" : "");
#define DUMP_EXCLUDE_CACHE 0x00000001 /* Exclude LRU & SwapCache pages*/
#define DUMP_EXCLUDE_CLEAN 0x00000002 /* Exclude all-zero pages */
#define DUMP_EXCLUDE_FREE 0x00000004 /* Exclude free pages */
#define DUMP_EXCLUDE_ANON 0x00000008 /* Exclude Anon pages */
#define DUMP_SAVE_PRIVATE 0x00000010 /* Save private pages */
others = 0;
if (dump_level & DUMP_EXCLUDE_CACHE)
netdump_print("%sDUMP_EXCLUDE_CACHE",
others++ ? "|" : "");
if (dump_level & DUMP_EXCLUDE_CLEAN)
netdump_print("%sDUMP_EXCLUDE_CLEAN",
others++ ? "|" : "");
if (dump_level & DUMP_EXCLUDE_FREE)
netdump_print("%sDUMP_EXCLUDE_FREE",
others++ ? "|" : "");
if (dump_level & DUMP_EXCLUDE_ANON)
netdump_print("%sDUMP_EXCLUDE_ANON",
others++ ? "|" : "");
if (dump_level & DUMP_SAVE_PRIVATE)
netdump_print("%sDUMP_SAVE_PRIVATE",
others++ ? "|" : "");
netdump_print("%s\n", dump_level > 0 ? ")" : "");
} else
netdump_print(" dump_level: (unknown)\n");
} else if (!(pc->flags & RUNTIME) && symbol_exists("dump_level"))
netdump_print(" dump_level: (undetermined)\n");
netdump_print(" ndfd: %d\n", nd->ndfd);
netdump_print(" ofp: %lx\n", nd->ofp);
netdump_print(" header_size: %d\n", nd->header_size);
netdump_print(" num_pt_load_segments: %d\n", nd->num_pt_load_segments);
for (i = 0; i < nd->num_pt_load_segments; i++) {
pls = &nd->pt_load_segments[i];
netdump_print(" pt_load_segment[%d]:\n", i);
netdump_print(" file_offset: %lx\n",
pls->file_offset);
netdump_print(" phys_start: %llx\n",
pls->phys_start);
netdump_print(" phys_end: %llx\n",
pls->phys_end);
netdump_print(" zero_fill: %llx\n",
pls->zero_fill);
}
netdump_print(" elf_header: %lx\n", nd->elf_header);
netdump_print(" elf32: %lx\n", nd->elf32);
netdump_print(" notes32: %lx\n", nd->notes32);
netdump_print(" load32: %lx\n", nd->load32);
netdump_print(" elf64: %lx\n", nd->elf64);
netdump_print(" notes64: %lx\n", nd->notes64);
netdump_print(" load64: %lx\n", nd->load64);
netdump_print(" nt_prstatus: %lx\n", nd->nt_prstatus);
netdump_print(" nt_prpsinfo: %lx\n", nd->nt_prpsinfo);
netdump_print(" nt_taskstruct: %lx\n", nd->nt_taskstruct);
netdump_print(" task_struct: %lx\n", nd->task_struct);
netdump_print(" page_size: %d\n", nd->page_size);
netdump_print(" switch_stack: %lx\n", nd->switch_stack);
netdump_print(" xen_kdump_data: %s\n",
XEN_CORE_DUMPFILE() ? " " : "(unused)");
if (XEN_CORE_DUMPFILE()) {
netdump_print(" flags: %lx (", nd->xen_kdump_data->flags);
others = 0;
if (nd->xen_kdump_data->flags & KDUMP_P2M_INIT)
netdump_print("%sKDUMP_P2M_INIT", others++ ? "|" : "");
if (nd->xen_kdump_data->flags & KDUMP_CR3)
netdump_print("%sKDUMP_CR3", others++ ? "|" : "");
if (nd->xen_kdump_data->flags & KDUMP_MFN_LIST)
netdump_print("%sKDUMP_MFN_LIST", others++ ? "|" : "");
netdump_print(")\n");
netdump_print(" p2m_mfn: %lx\n",
nd->xen_kdump_data->p2m_mfn);
netdump_print(" cr3: %lx\n",
nd->xen_kdump_data->cr3);
netdump_print(" last_mfn_read: %lx\n",
nd->xen_kdump_data->last_mfn_read);
netdump_print(" last_pmd_read: %lx\n",
nd->xen_kdump_data->last_pmd_read);
netdump_print(" page: %lx\n",
nd->xen_kdump_data->page);
netdump_print(" accesses: %ld\n",
nd->xen_kdump_data->accesses);
netdump_print(" cache_hits: %ld ",
nd->xen_kdump_data->cache_hits);
if (nd->xen_kdump_data->accesses)
netdump_print("(%ld%%)",
nd->xen_kdump_data->cache_hits * 100 / nd->xen_kdump_data->accesses);
netdump_print("\n p2m_frames: %d\n",
nd->xen_kdump_data->p2m_frames);
netdump_print(" xen_phys_start: %lx\n",
nd->xen_kdump_data->xen_phys_start);
netdump_print(" xen_major_version: %d\n",
nd->xen_kdump_data->xen_major_version);
netdump_print(" xen_minor_version: %d\n",
nd->xen_kdump_data->xen_minor_version);
netdump_print(" p2m_mfn_frame_list: %lx\n",
nd->xen_kdump_data->p2m_mfn_frame_list);
for (i = 0; i < nd->xen_kdump_data->p2m_frames; i++)
netdump_print("%lx ",
nd->xen_kdump_data->p2m_mfn_frame_list[i]);
if (i) netdump_print("\n");
}
netdump_print(" num_prstatus_notes: %d\n", nd->num_prstatus_notes);
netdump_print(" num_qemu_notes: %d\n", nd->num_qemu_notes);
netdump_print(" vmcoreinfo: %lx\n", (ulong)nd->vmcoreinfo);
netdump_print(" size_vmcoreinfo: %d\n", nd->size_vmcoreinfo);
netdump_print(" nt_prstatus_percpu: ");
wrap = sizeof(void *) == SIZEOF_32BIT ? 8 : 4;
flen = sizeof(void *) == SIZEOF_32BIT ? 8 : 16;
if (nd->num_prstatus_notes == 1)
netdump_print("%.*lx\n", flen, nd->nt_prstatus_percpu[0]);
else {
for (i = 0; i < nd->num_prstatus_notes; i++) {
if ((i % wrap) == 0)
netdump_print("\n ");
netdump_print("%.*lx ", flen,
nd->nt_prstatus_percpu[i]);
}
}
netdump_print("\n");
netdump_print(" nt_qemu_percpu: ");
if (nd->num_qemu_notes == 1)
netdump_print("%.*lx\n", flen, nd->nt_qemu_percpu[0]);
else {
for (i = 0; i < nd->num_qemu_notes; i++) {
if ((i % wrap) == 0)
netdump_print("\n ");
netdump_print("%.*lx ", flen,
nd->nt_qemu_percpu[i]);
}
}
netdump_print("\n");
netdump_print(" backup_src_start: %llx\n", nd->backup_src_start);
netdump_print(" backup_src_size: %lx\n", nd->backup_src_size);
netdump_print(" backup_offset: %llx\n", nd->backup_offset);
netdump_print("\n");
switch (DUMPFILE_FORMAT(nd->flags))
{
case NETDUMP_ELF32:
case KDUMP_ELF32:
dump_Elf32_Ehdr(nd->elf32);
dump_Elf32_Phdr(nd->notes32, ELFREAD);
for (i = 0; i < nd->num_pt_load_segments; i++)
dump_Elf32_Phdr(nd->load32 + i, ELFREAD);
offset32 = nd->notes32->p_offset;
for (tot = 0; tot < nd->notes32->p_filesz; tot += len) {
if (!(len = dump_Elf32_Nhdr(offset32, ELFREAD)))
break;
offset32 += len;
}
break;
case NETDUMP_ELF64:
case KDUMP_ELF64:
dump_Elf64_Ehdr(nd->elf64);
dump_Elf64_Phdr(nd->notes64, ELFREAD);
for (i = 0; i < nd->num_pt_load_segments; i++)
dump_Elf64_Phdr(nd->load64 + i, ELFREAD);
offset64 = nd->notes64->p_offset;
for (tot = 0; tot < nd->notes64->p_filesz; tot += len) {
if (!(len = dump_Elf64_Nhdr(offset64, ELFREAD)))
break;
offset64 += len;
}
break;
}
nd->ofp = fpsave;
return TRUE;
}
/*
* Dump an ELF file header.
*/
static void
dump_Elf32_Ehdr(Elf32_Ehdr *elf)
{
char buf[BUFSIZE];
BZERO(buf, BUFSIZE);
BCOPY(elf->e_ident, buf, SELFMAG);
netdump_print("Elf32_Ehdr:\n");
netdump_print(" e_ident: \\%o%s\n", buf[0],
&buf[1]);
netdump_print(" e_ident[EI_CLASS]: %d ", elf->e_ident[EI_CLASS]);
switch (elf->e_ident[EI_CLASS])
{
case ELFCLASSNONE:
netdump_print("(ELFCLASSNONE)");
break;
case ELFCLASS32:
netdump_print("(ELFCLASS32)\n");
break;
case ELFCLASS64:
netdump_print("(ELFCLASS64)\n");
break;
case ELFCLASSNUM:
netdump_print("(ELFCLASSNUM)\n");
break;
default:
netdump_print("(?)\n");
break;
}
netdump_print(" e_ident[EI_DATA]: %d ", elf->e_ident[EI_DATA]);
switch (elf->e_ident[EI_DATA])
{
case ELFDATANONE:
netdump_print("(ELFDATANONE)\n");
break;
case ELFDATA2LSB:
netdump_print("(ELFDATA2LSB)\n");
break;
case ELFDATA2MSB:
netdump_print("(ELFDATA2MSB)\n");
break;
case ELFDATANUM:
netdump_print("(ELFDATANUM)\n");
break;
default:
netdump_print("(?)\n");
}
netdump_print(" e_ident[EI_VERSION]: %d ",
elf->e_ident[EI_VERSION]);
if (elf->e_ident[EI_VERSION] == EV_CURRENT)
netdump_print("(EV_CURRENT)\n");
else
netdump_print("(?)\n");
netdump_print(" e_ident[EI_OSABI]: %d ", elf->e_ident[EI_OSABI]);
switch (elf->e_ident[EI_OSABI])
{
case ELFOSABI_SYSV:
netdump_print("(ELFOSABI_SYSV)\n");
break;
case ELFOSABI_HPUX:
netdump_print("(ELFOSABI_HPUX)\n");
break;
case ELFOSABI_ARM:
netdump_print("(ELFOSABI_ARM)\n");
break;
case ELFOSABI_STANDALONE:
netdump_print("(ELFOSABI_STANDALONE)\n");
break;
default:
netdump_print("(?)\n");
}
netdump_print(" e_ident[EI_ABIVERSION]: %d\n",
elf->e_ident[EI_ABIVERSION]);
netdump_print(" e_type: %d ", elf->e_type);
switch (elf->e_type)
{
case ET_NONE:
netdump_print("(ET_NONE)\n");
break;
case ET_REL:
netdump_print("(ET_REL)\n");
break;
case ET_EXEC:
netdump_print("(ET_EXEC)\n");
break;
case ET_DYN:
netdump_print("(ET_DYN)\n");
break;
case ET_CORE:
netdump_print("(ET_CORE)\n");
break;
case ET_NUM:
netdump_print("(ET_NUM)\n");
break;
case ET_LOOS:
netdump_print("(ET_LOOS)\n");
break;
case ET_HIOS:
netdump_print("(ET_HIOS)\n");
break;
case ET_LOPROC:
netdump_print("(ET_LOPROC)\n");
break;
case ET_HIPROC:
netdump_print("(ET_HIPROC)\n");
break;
default:
netdump_print("(?)\n");
}
netdump_print(" e_machine: %d ", elf->e_machine);
switch (elf->e_machine)
{
case EM_386:
netdump_print("(EM_386)\n");
break;
default:
netdump_print("(unsupported)\n");
break;
}
netdump_print(" e_version: %ld ", elf->e_version);
netdump_print("%s\n", elf->e_version == EV_CURRENT ?
"(EV_CURRENT)" : "");
netdump_print(" e_entry: %lx\n", elf->e_entry);
netdump_print(" e_phoff: %lx\n", elf->e_phoff);
netdump_print(" e_shoff: %lx\n", elf->e_shoff);
netdump_print(" e_flags: %lx\n", elf->e_flags);
netdump_print(" e_ehsize: %x\n", elf->e_ehsize);
netdump_print(" e_phentsize: %x\n", elf->e_phentsize);
netdump_print(" e_phnum: %x\n", elf->e_phnum);
netdump_print(" e_shentsize: %x\n", elf->e_shentsize);
netdump_print(" e_shnum: %x\n", elf->e_shnum);
netdump_print(" e_shstrndx: %x\n", elf->e_shstrndx);
}
static void
dump_Elf64_Ehdr(Elf64_Ehdr *elf)
{
char buf[BUFSIZE];
BZERO(buf, BUFSIZE);
BCOPY(elf->e_ident, buf, SELFMAG);
netdump_print("Elf64_Ehdr:\n");
netdump_print(" e_ident: \\%o%s\n", buf[0],
&buf[1]);
netdump_print(" e_ident[EI_CLASS]: %d ", elf->e_ident[EI_CLASS]);
switch (elf->e_ident[EI_CLASS])
{
case ELFCLASSNONE:
netdump_print("(ELFCLASSNONE)");
break;
case ELFCLASS32:
netdump_print("(ELFCLASS32)\n");
break;
case ELFCLASS64:
netdump_print("(ELFCLASS64)\n");
break;
case ELFCLASSNUM:
netdump_print("(ELFCLASSNUM)\n");
break;
default:
netdump_print("(?)\n");
break;
}
netdump_print(" e_ident[EI_DATA]: %d ", elf->e_ident[EI_DATA]);
switch (elf->e_ident[EI_DATA])
{
case ELFDATANONE:
netdump_print("(ELFDATANONE)\n");
break;
case ELFDATA2LSB:
netdump_print("(ELFDATA2LSB)\n");
break;
case ELFDATA2MSB:
netdump_print("(ELFDATA2MSB)\n");
break;
case ELFDATANUM:
netdump_print("(ELFDATANUM)\n");
break;
default:
netdump_print("(?)\n");
}
netdump_print(" e_ident[EI_VERSION]: %d ",
elf->e_ident[EI_VERSION]);
if (elf->e_ident[EI_VERSION] == EV_CURRENT)
netdump_print("(EV_CURRENT)\n");
else
netdump_print("(?)\n");
netdump_print(" e_ident[EI_OSABI]: %d ", elf->e_ident[EI_OSABI]);
switch (elf->e_ident[EI_OSABI])
{
case ELFOSABI_SYSV:
netdump_print("(ELFOSABI_SYSV)\n");
break;
case ELFOSABI_HPUX:
netdump_print("(ELFOSABI_HPUX)\n");
break;
case ELFOSABI_ARM:
netdump_print("(ELFOSABI_ARM)\n");
break;
case ELFOSABI_STANDALONE:
netdump_print("(ELFOSABI_STANDALONE)\n");
break;
default:
netdump_print("(?)\n");
}
netdump_print(" e_ident[EI_ABIVERSION]: %d\n",
elf->e_ident[EI_ABIVERSION]);
netdump_print(" e_type: %d ", elf->e_type);
switch (elf->e_type)
{
case ET_NONE:
netdump_print("(ET_NONE)\n");
break;
case ET_REL:
netdump_print("(ET_REL)\n");
break;
case ET_EXEC:
netdump_print("(ET_EXEC)\n");
break;
case ET_DYN:
netdump_print("(ET_DYN)\n");
break;
case ET_CORE:
netdump_print("(ET_CORE)\n");
break;
case ET_NUM:
netdump_print("(ET_NUM)\n");
break;
case ET_LOOS:
netdump_print("(ET_LOOS)\n");
break;
case ET_HIOS:
netdump_print("(ET_HIOS)\n");
break;
case ET_LOPROC:
netdump_print("(ET_LOPROC)\n");
break;
case ET_HIPROC:
netdump_print("(ET_HIPROC)\n");
break;
default:
netdump_print("(?)\n");
}
netdump_print(" e_machine: %d ", elf->e_machine);
switch (elf->e_machine)
{
case EM_386:
netdump_print("(EM_386)\n");
break;
case EM_IA_64:
netdump_print("(EM_IA_64)\n");
break;
case EM_PPC64:
netdump_print("(EM_PPC64)\n");
break;
case EM_X86_64:
netdump_print("(EM_X86_64)\n");
break;
case EM_S390:
netdump_print("(EM_S390)\n");
break;
default:
netdump_print("(unsupported)\n");
break;
}
netdump_print(" e_version: %ld ", elf->e_version);
netdump_print("%s\n", elf->e_version == EV_CURRENT ?
"(EV_CURRENT)" : "");
netdump_print(" e_entry: %lx\n", elf->e_entry);
netdump_print(" e_phoff: %lx\n", elf->e_phoff);
netdump_print(" e_shoff: %lx\n", elf->e_shoff);
netdump_print(" e_flags: %lx\n", elf->e_flags);
netdump_print(" e_ehsize: %x\n", elf->e_ehsize);
netdump_print(" e_phentsize: %x\n", elf->e_phentsize);
netdump_print(" e_phnum: %x\n", elf->e_phnum);
netdump_print(" e_shentsize: %x\n", elf->e_shentsize);
netdump_print(" e_shnum: %x\n", elf->e_shnum);
netdump_print(" e_shstrndx: %x\n", elf->e_shstrndx);
}
/*
* Dump a program segment header
*/
static void
dump_Elf32_Phdr(Elf32_Phdr *prog, int store_pt_load_data)
{
int others;
struct pt_load_segment *pls;
if ((char *)prog > (nd->elf_header + nd->header_size))
error(FATAL,
"Elf32_Phdr pointer: %lx ELF header end: %lx\n\n",
(char *)prog, nd->elf_header + nd->header_size);
if (store_pt_load_data)
pls = &nd->pt_load_segments[store_pt_load_data-1];
else
pls = NULL;
netdump_print("Elf32_Phdr:\n");
netdump_print(" p_type: %lx ", prog->p_type);
switch (prog->p_type)
{
case PT_NULL:
netdump_print("(PT_NULL)\n");
break;
case PT_LOAD:
netdump_print("(PT_LOAD)\n");
break;
case PT_DYNAMIC:
netdump_print("(PT_DYNAMIC)\n");
break;
case PT_INTERP:
netdump_print("(PT_INTERP)\n");
break;
case PT_NOTE:
netdump_print("(PT_NOTE)\n");
break;
case PT_SHLIB:
netdump_print("(PT_SHLIB)\n");
break;
case PT_PHDR:
netdump_print("(PT_PHDR)\n");
break;
case PT_NUM:
netdump_print("(PT_NUM)\n");
break;
case PT_LOOS:
netdump_print("(PT_LOOS)\n");
break;
case PT_HIOS:
netdump_print("(PT_HIOS)\n");
break;
case PT_LOPROC:
netdump_print("(PT_LOPROC)\n");
break;
case PT_HIPROC:
netdump_print("(PT_HIPROC)\n");
break;
default:
netdump_print("(?)\n");
}
netdump_print(" p_offset: %ld (%lx)\n", prog->p_offset,
prog->p_offset);
if (store_pt_load_data)
pls->file_offset = prog->p_offset;
netdump_print(" p_vaddr: %lx\n", prog->p_vaddr);
netdump_print(" p_paddr: %lx\n", prog->p_paddr);
if (store_pt_load_data)
pls->phys_start = prog->p_paddr;
netdump_print(" p_filesz: %lu (%lx)\n", prog->p_filesz,
prog->p_filesz);
if (store_pt_load_data) {
pls->phys_end = pls->phys_start + prog->p_filesz;
pls->zero_fill = (prog->p_filesz == prog->p_memsz) ?
0 : pls->phys_start + prog->p_memsz;
}
netdump_print(" p_memsz: %lu (%lx)\n", prog->p_memsz,
prog->p_memsz);
netdump_print(" p_flags: %lx (", prog->p_flags);
others = 0;
if (prog->p_flags & PF_X)
netdump_print("PF_X", others++);
if (prog->p_flags & PF_W)
netdump_print("%sPF_W", others++ ? "|" : "");
if (prog->p_flags & PF_R)
netdump_print("%sPF_R", others++ ? "|" : "");
netdump_print(")\n");
netdump_print(" p_align: %ld\n", prog->p_align);
}
static void
dump_Elf64_Phdr(Elf64_Phdr *prog, int store_pt_load_data)
{
int others;
struct pt_load_segment *pls;
if (store_pt_load_data)
pls = &nd->pt_load_segments[store_pt_load_data-1];
else
pls = NULL;
if ((char *)prog > (nd->elf_header + nd->header_size))
error(FATAL,
"Elf64_Phdr pointer: %lx ELF header end: %lx\n\n",
(char *)prog, nd->elf_header + nd->header_size);
netdump_print("Elf64_Phdr:\n");
netdump_print(" p_type: %lx ", prog->p_type);
switch (prog->p_type)
{
case PT_NULL:
netdump_print("(PT_NULL)\n");
break;
case PT_LOAD:
netdump_print("(PT_LOAD)\n");
break;
case PT_DYNAMIC:
netdump_print("(PT_DYNAMIC)\n");
break;
case PT_INTERP:
netdump_print("(PT_INTERP)\n");
break;
case PT_NOTE:
netdump_print("(PT_NOTE)\n");
break;
case PT_SHLIB:
netdump_print("(PT_SHLIB)\n");
break;
case PT_PHDR:
netdump_print("(PT_PHDR)\n");
break;
case PT_NUM:
netdump_print("(PT_NUM)\n");
break;
case PT_LOOS:
netdump_print("(PT_LOOS)\n");
break;
case PT_HIOS:
netdump_print("(PT_HIOS)\n");
break;
case PT_LOPROC:
netdump_print("(PT_LOPROC)\n");
break;
case PT_HIPROC:
netdump_print("(PT_HIPROC)\n");
break;
default:
netdump_print("(?)\n");
}
netdump_print(" p_offset: %lld (%llx)\n", prog->p_offset,
prog->p_offset);
if (store_pt_load_data)
pls->file_offset = prog->p_offset;
netdump_print(" p_vaddr: %llx\n", prog->p_vaddr);
netdump_print(" p_paddr: %llx\n", prog->p_paddr);
if (store_pt_load_data)
pls->phys_start = prog->p_paddr;
netdump_print(" p_filesz: %llu (%llx)\n", prog->p_filesz,
prog->p_filesz);
if (store_pt_load_data) {
pls->phys_end = pls->phys_start + prog->p_filesz;
pls->zero_fill = (prog->p_filesz == prog->p_memsz) ?
0 : pls->phys_start + prog->p_memsz;
}
netdump_print(" p_memsz: %llu (%llx)\n", prog->p_memsz,
prog->p_memsz);
netdump_print(" p_flags: %lx (", prog->p_flags);
others = 0;
if (prog->p_flags & PF_X)
netdump_print("PF_X", others++);
if (prog->p_flags & PF_W)
netdump_print("%sPF_W", others++ ? "|" : "");
if (prog->p_flags & PF_R)
netdump_print("%sPF_R", others++ ? "|" : "");
netdump_print(")\n");
netdump_print(" p_align: %lld\n", prog->p_align);
}
/*
* VMCOREINFO
*
* This is a ELF note intented for makedumpfile that is exported by the
* kernel that crashes and presented as ELF note to the /proc/vmcore
* of the panic kernel.
*/
#define VMCOREINFO_NOTE_NAME "VMCOREINFO"
#define VMCOREINFO_NOTE_NAME_BYTES (sizeof(VMCOREINFO_NOTE_NAME))
/*
* Reads a string value from VMCOREINFO.
*
* Returns a string (that has to be freed by the caller) that contains the
* value for key or NULL if the key has not been found.
*/
static char *
vmcoreinfo_read_string(const char *key)
{
int i, j, end;
size_t value_length;
size_t key_length = strlen(key);
char *vmcoreinfo = (char *)nd->vmcoreinfo;
char *value = NULL;
if (!nd->vmcoreinfo)
return NULL;
/* the '+ 1' is the equal sign */
for (i = 0; i < (nd->size_vmcoreinfo - key_length + 1); i++) {
/*
* We must also check if we're at the beginning of VMCOREINFO
* or the separating newline is there, and of course if we
* have a equal sign after the key.
*/
if ((strncmp(vmcoreinfo+i, key, key_length) == 0) &&
(i == 0 || vmcoreinfo[i-1] == '\n') &&
(vmcoreinfo[i+key_length] == '=')) {
end = -1;
/* Found -- search for the next newline. */
for (j = i + key_length + 1;
j < nd->size_vmcoreinfo; j++) {
if (vmcoreinfo[j] == '\n') {
end = j;
break;
}
}
/*
* If we didn't find an end, we assume it's the end
* of VMCOREINFO data.
*/
if (end == -1) {
/* Point after the end. */
end = nd->size_vmcoreinfo + 1;
}
value_length = end - (1+ i + key_length);
value = calloc(value_length+1, sizeof(char));
if (value)
strncpy(value, vmcoreinfo + i + key_length + 1,
value_length);
break;
}
}
return value;
}
/*
* Reads an integer value from VMCOREINFO.
*/
static long
vmcoreinfo_read_integer(const char *key, long default_value)
{
char *string;
long retval = default_value;
string = vmcoreinfo_read_string(key);
if (string) {
retval = atol(string);
free(string);
}
return retval;
}
/*
* Dump a note section header -- the actual data is defined by netdump
*/
static size_t
dump_Elf32_Nhdr(Elf32_Off offset, int store)
{
int i, lf, words;
Elf32_Nhdr *note;
size_t len;
char buf[BUFSIZE];
char *ptr;
ulong *uptr;
int xen_core, vmcoreinfo, eraseinfo, qemuinfo;
uint64_t remaining, notesize;
note = (Elf32_Nhdr *)((char *)nd->elf32 + offset);
BZERO(buf, BUFSIZE);
xen_core = vmcoreinfo = eraseinfo = qemuinfo = FALSE;
ptr = (char *)note + sizeof(Elf32_Nhdr);
if (ptr > (nd->elf_header + nd->header_size)) {
error(WARNING,
"Elf32_Nhdr pointer: %lx ELF header end: %lx\n",
(char *)note, nd->elf_header + nd->header_size);
return 0;
} else
remaining = (uint64_t)((nd->elf_header + nd->header_size) - ptr);
notesize = (uint64_t)note->n_namesz + (uint64_t)note->n_descsz;
if ((note->n_namesz == 0) || !remaining || (notesize > remaining)) {
error(WARNING,
"possibly corrupt Elf32_Nhdr: "
"n_namesz: %ld n_descsz: %ld n_type: %lx\n%s",
note->n_namesz, note->n_descsz, note->n_type,
note->n_namesz || note->n_descsz || !remaining ?
"\n" : "");
if (note->n_namesz || note->n_descsz || !remaining)
return 0;
}
netdump_print("Elf32_Nhdr:\n");
netdump_print(" n_namesz: %ld ", note->n_namesz);
BCOPY(ptr, buf, note->n_namesz);
netdump_print("(\"%s\")\n", buf);
netdump_print(" n_descsz: %ld\n", note->n_descsz);
netdump_print(" n_type: %lx ", note->n_type);
switch (note->n_type)
{
case NT_PRSTATUS:
netdump_print("(NT_PRSTATUS)\n");
if (store) {
if (!nd->nt_prstatus)
nd->nt_prstatus = (void *)note;
for (i = 0; i < NR_CPUS; i++) {
if (!nd->nt_prstatus_percpu[i]) {
nd->nt_prstatus_percpu[i] = (void *)note;
nd->num_prstatus_notes++;
break;
}
}
}
if (machine_type("PPC") && (nd->num_prstatus_notes > 0))
pc->flags2 |= ELF_NOTES;
break;
case NT_PRPSINFO:
netdump_print("(NT_PRPSINFO)\n");
if (store)
nd->nt_prpsinfo = (void *)note;
break;
case NT_TASKSTRUCT:
netdump_print("(NT_TASKSTRUCT)\n");
if (store) {
nd->nt_taskstruct = (void *)note;
nd->task_struct = *((ulong *)(ptr + note->n_namesz));
nd->switch_stack = *((ulong *)
(ptr + note->n_namesz + sizeof(ulong)));
}
break;
case NT_DISKDUMP:
netdump_print("(NT_DISKDUMP)\n");
uptr = (ulong *)(ptr + note->n_namesz);
if (*uptr && store)
nd->flags |= PARTIAL_DUMP;
break;
#ifdef NOTDEF
/*
* Note: Based upon the original, abandoned, proposal for
* its contents -- keep around for potential future use.
*/
case NT_KDUMPINFO:
netdump_print("(NT_KDUMPINFO)\n");
if (store) {
uptr = (note->n_namesz == 5) ?
(ulong *)(ptr + ((note->n_namesz + 3) & ~3)) :
(ulong *)(ptr + note->n_namesz);
nd->page_size = (uint)(1 << *uptr);
uptr++;
nd->task_struct = *uptr;
}
break;
#endif
default:
xen_core = STRNEQ(buf, "XEN CORE") || STRNEQ(buf, "Xen");
vmcoreinfo = STRNEQ(buf, "VMCOREINFO");
eraseinfo = STRNEQ(buf, "ERASEINFO");
qemuinfo = STRNEQ(buf, "QEMU");
if (xen_core) {
netdump_print("(unknown Xen n_type)\n");
if (store)
error(WARNING, "unknown Xen n_type: %lx\n\n",
note->n_type);
} else if (vmcoreinfo) {
netdump_print("(unused)\n");
nd->vmcoreinfo = (char *)(ptr + note->n_namesz + 1);
nd->size_vmcoreinfo = note->n_descsz;
if (READ_PAGESIZE_FROM_VMCOREINFO() && store)
nd->page_size = (uint)
vmcoreinfo_read_integer("PAGESIZE", 0);
pc->flags2 |= VMCOREINFO;
} else if (eraseinfo) {
netdump_print("(unused)\n");
if (note->n_descsz)
pc->flags2 |= ERASEINFO_DATA;
} else
netdump_print("(?)\n");
if (qemuinfo)
pc->flags2 |= QEMU_MEM_DUMP;
break;
case NT_XEN_KDUMP_CR3:
netdump_print("(NT_XEN_KDUMP_CR3) [obsolete]\n");
if (store)
error(WARNING,
"obsolete Xen n_type: %lx (NT_XEN_KDUMP_CR3)\n\n",
note->n_type);
/* FALL THROUGH */
case XEN_ELFNOTE_CRASH_INFO:
/*
* x86 and x86_64: p2m mfn appended to crash_xen_info_t structure
*/
if (note->n_type == XEN_ELFNOTE_CRASH_INFO)
netdump_print("(XEN_ELFNOTE_CRASH_INFO)\n");
xen_core = TRUE;
if (store) {
pc->flags |= XEN_CORE;
nd->xen_kdump_data = &xen_kdump_data;
nd->xen_kdump_data->last_mfn_read = UNINITIALIZED;
nd->xen_kdump_data->last_pmd_read = UNINITIALIZED;
if ((note->n_type == NT_XEN_KDUMP_CR3) &&
((note->n_descsz/sizeof(ulong)) == 1)) {
nd->xen_kdump_data->flags |= KDUMP_CR3;
/*
* Use the first cr3 found.
*/
if (!nd->xen_kdump_data->cr3) {
uptr = (ulong *)(ptr + note->n_namesz);
uptr = (ulong *)roundup((ulong)uptr, 4);
nd->xen_kdump_data->cr3 = *uptr;
}
} else {
nd->xen_kdump_data->flags |= KDUMP_MFN_LIST;
uptr = (ulong *)(ptr + note->n_namesz);
uptr = (ulong *)roundup((ulong)uptr, 4);
words = note->n_descsz/sizeof(ulong);
/*
* If already set, overridden with --pfm_mfn
*/
if (!nd->xen_kdump_data->p2m_mfn)
nd->xen_kdump_data->p2m_mfn = *(uptr+(words-1));
if (words > 9 && !nd->xen_kdump_data->xen_phys_start)
nd->xen_kdump_data->xen_phys_start = *(uptr+(words-2));
nd->xen_kdump_data->xen_major_version = *uptr;
nd->xen_kdump_data->xen_minor_version = *(uptr+1);
}
}
break;
case XEN_ELFNOTE_CRASH_REGS:
/*
* x86 and x86_64: cr0, cr2, cr3, cr4
*/
xen_core = TRUE;
netdump_print("(XEN_ELFNOTE_CRASH_REGS)\n");
break;
}
uptr = (ulong *)(ptr + note->n_namesz);
/*
* kdumps are off-by-1, because their n_namesz is 5 for "CORE".
*/
if ((nd->flags & KDUMP_ELF32) && (note->n_namesz == 5))
uptr = (ulong *)(ptr + ((note->n_namesz + 3) & ~3));
if (xen_core)
uptr = (ulong *)roundup((ulong)uptr, 4);
if (store && qemuinfo) {
for(i=0; i<NR_CPUS; i++) {
if (!nd->nt_qemu_percpu[i]) {
nd->nt_qemu_percpu[i] = (void *)uptr;
nd->num_qemu_notes++;
break;
}
}
}
if (vmcoreinfo || eraseinfo) {
netdump_print(" ");
ptr += note->n_namesz + 1;
for (i = 0; i < note->n_descsz; i++, ptr++) {
netdump_print("%c", *ptr);
if (*ptr == '\n')
netdump_print(" ");
}
lf = 0;
} else {
for (i = lf = 0; i < note->n_descsz/sizeof(ulong); i++) {
if (((i%4)==0)) {
netdump_print("%s ",
i ? "\n" : "");
lf++;
} else
lf = 0;
netdump_print("%08lx ", *uptr++);
}
}
if (!lf || (note->n_type == NT_TASKSTRUCT) ||
(note->n_type == NT_DISKDUMP) || xen_core)
netdump_print("\n");
len = sizeof(Elf32_Nhdr);
len = roundup(len + note->n_namesz, 4);
len = roundup(len + note->n_descsz, 4);
return len;
}
static size_t
dump_Elf64_Nhdr(Elf64_Off offset, int store)
{
int i, lf, words;
Elf64_Nhdr *note;
size_t len;
char buf[BUFSIZE];
char *ptr;
ulonglong *uptr;
int *iptr;
ulong *up;
int xen_core, vmcoreinfo, eraseinfo, qemuinfo;
uint64_t remaining, notesize;
note = (Elf64_Nhdr *)((char *)nd->elf64 + offset);
BZERO(buf, BUFSIZE);
ptr = (char *)note + sizeof(Elf64_Nhdr);
xen_core = vmcoreinfo = eraseinfo = qemuinfo = FALSE;
if (ptr > (nd->elf_header + nd->header_size)) {
error(WARNING,
"Elf64_Nhdr pointer: %lx ELF header end: %lx\n\n",
(char *)note, nd->elf_header + nd->header_size);
return 0;
} else
remaining = (uint64_t)((nd->elf_header + nd->header_size) - ptr);
notesize = (uint64_t)note->n_namesz + (uint64_t)note->n_descsz;
if ((note->n_namesz == 0) || !remaining || (notesize > remaining)) {
error(WARNING,
"possibly corrupt Elf64_Nhdr: "
"n_namesz: %ld n_descsz: %ld n_type: %lx\n%s",
note->n_namesz, note->n_descsz, note->n_type,
note->n_namesz || note->n_descsz || !remaining ?
"\n" : "");
if (note->n_namesz || note->n_descsz || !remaining)
return 0;
}
netdump_print("Elf64_Nhdr:\n");
netdump_print(" n_namesz: %ld ", note->n_namesz);
BCOPY(ptr, buf, note->n_namesz);
netdump_print("(\"%s\")\n", buf);
netdump_print(" n_descsz: %ld\n", note->n_descsz);
netdump_print(" n_type: %lx ", note->n_type);
switch (note->n_type)
{
case NT_PRSTATUS:
netdump_print("(NT_PRSTATUS)\n");
if (store) {
if (!nd->nt_prstatus)
nd->nt_prstatus = (void *)note;
for (i = 0; i < NR_CPUS; i++) {
if (!nd->nt_prstatus_percpu[i]) {
nd->nt_prstatus_percpu[i] = (void *)note;
nd->num_prstatus_notes++;
break;
}
}
}
break;
case NT_PRPSINFO:
netdump_print("(NT_PRPSINFO)\n");
if (store)
nd->nt_prpsinfo = (void *)note;
break;
case NT_FPREGSET:
netdump_print("(NT_FPREGSET)\n");
break;
case NT_S390_TIMER:
netdump_print("(NT_S390_TIMER)\n");
break;
case NT_S390_TODCMP:
netdump_print("(NT_S390_TODCMP)\n");
break;
case NT_S390_TODPREG:
netdump_print("(NT_S390_TODPREG)\n");
break;
case NT_S390_CTRS:
netdump_print("(NT_S390_CTRS)\n");
break;
case NT_S390_PREFIX:
netdump_print("(NT_S390_PREFIX)\n");
break;
case NT_TASKSTRUCT:
netdump_print("(NT_TASKSTRUCT)\n");
if (STRNEQ(buf, "SNAP"))
pc->flags2 |= LIVE_DUMP;
if (store) {
nd->nt_taskstruct = (void *)note;
nd->task_struct = *((ulong *)(ptr + note->n_namesz));
nd->switch_stack = *((ulong *)
(ptr + note->n_namesz + sizeof(ulong)));
}
break;
case NT_DISKDUMP:
netdump_print("(NT_DISKDUMP)\n");
iptr = (int *)(ptr + note->n_namesz);
if (*iptr && store)
nd->flags |= PARTIAL_DUMP;
if (note->n_descsz < sizeof(ulonglong))
netdump_print(" %08x", *iptr);
break;
#ifdef NOTDEF
/*
* Note: Based upon the original, abandoned, proposal for
* its contents -- keep around for potential future use.
*/
case NT_KDUMPINFO:
netdump_print("(NT_KDUMPINFO)\n");
if (store) {
uint32_t *u32ptr;
if (nd->elf64->e_machine == EM_386) {
u32ptr = (note->n_namesz == 5) ?
(uint *)(ptr + ((note->n_namesz + 3) & ~3)) :
(uint *)(ptr + note->n_namesz);
nd->page_size = 1 << *u32ptr;
u32ptr++;
nd->task_struct = *u32ptr;
} else {
uptr = (note->n_namesz == 5) ?
(ulonglong *)(ptr + ((note->n_namesz + 3) & ~3)) :
(ulonglong *)(ptr + note->n_namesz);
nd->page_size = (uint)(1 << *uptr);
uptr++;
nd->task_struct = *uptr;
}
}
break;
#endif
default:
xen_core = STRNEQ(buf, "XEN CORE") || STRNEQ(buf, "Xen");
vmcoreinfo = STRNEQ(buf, "VMCOREINFO");
eraseinfo = STRNEQ(buf, "ERASEINFO");
qemuinfo = STRNEQ(buf, "QEMU");
if (xen_core) {
netdump_print("(unknown Xen n_type)\n");
if (store)
error(WARNING,
"unknown Xen n_type: %lx\n\n", note->n_type);
} else if (vmcoreinfo) {
netdump_print("(unused)\n");
nd->vmcoreinfo = (char *)nd->elf64 + offset +
(sizeof(Elf64_Nhdr) +
((note->n_namesz + 3) & ~3));
nd->size_vmcoreinfo = note->n_descsz;
if (READ_PAGESIZE_FROM_VMCOREINFO() && store)
nd->page_size = (uint)
vmcoreinfo_read_integer("PAGESIZE", 0);
pc->flags2 |= VMCOREINFO;
} else if (eraseinfo) {
netdump_print("(unused)\n");
if (note->n_descsz)
pc->flags2 |= ERASEINFO_DATA;
} else
netdump_print("(?)\n");
if (qemuinfo)
pc->flags2 |= QEMU_MEM_DUMP;
break;
case NT_XEN_KDUMP_CR3:
netdump_print("(NT_XEN_KDUMP_CR3) [obsolete]\n");
if (store)
error(WARNING,
"obsolete Xen n_type: %lx (NT_XEN_KDUMP_CR3)\n\n",
note->n_type);
/* FALL THROUGH */
case XEN_ELFNOTE_CRASH_INFO:
/*
* x86 and x86_64: p2m mfn appended to crash_xen_info_t structure
*/
if (note->n_type == XEN_ELFNOTE_CRASH_INFO)
netdump_print("(XEN_ELFNOTE_CRASH_INFO)\n");
xen_core = TRUE;
if (store) {
pc->flags |= XEN_CORE;
nd->xen_kdump_data = &xen_kdump_data;
nd->xen_kdump_data->last_mfn_read = UNINITIALIZED;
nd->xen_kdump_data->last_pmd_read = UNINITIALIZED;
if ((note->n_type == NT_XEN_KDUMP_CR3) &&
((note->n_descsz/sizeof(ulong)) == 1)) {
nd->xen_kdump_data->flags |= KDUMP_CR3;
/*
* Use the first cr3 found.
*/
if (!nd->xen_kdump_data->cr3) {
up = (ulong *)(ptr + note->n_namesz);
up = (ulong *)roundup((ulong)up, 4);
nd->xen_kdump_data->cr3 = *up;
}
} else {
nd->xen_kdump_data->flags |= KDUMP_MFN_LIST;
up = (ulong *)(ptr + note->n_namesz);
up = (ulong *)roundup((ulong)up, 4);
words = note->n_descsz/sizeof(ulong);
/*
* If already set, overridden with --p2m_mfn
*/
if (!nd->xen_kdump_data->p2m_mfn)
nd->xen_kdump_data->p2m_mfn = *(up+(words-1));
if (words > 9 && !nd->xen_kdump_data->xen_phys_start)
nd->xen_kdump_data->xen_phys_start = *(up+(words-2));
nd->xen_kdump_data->xen_major_version = *up;
nd->xen_kdump_data->xen_minor_version = *(up+1);
}
}
break;
case XEN_ELFNOTE_CRASH_REGS:
/*
* x86 and x86_64: cr0, cr2, cr3, cr4
*/
xen_core = TRUE;
netdump_print("(XEN_ELFNOTE_CRASH_REGS)\n");
break;
}
if (machine_type("S390X")) {
if (store)
machdep->dumpfile_init(nd->num_prstatus_notes, note);
uptr = (ulonglong *)
((void *)note + roundup(sizeof(*note) + note->n_namesz, 4));
} else {
uptr = (ulonglong *)(ptr + note->n_namesz);
/*
* kdumps are off-by-1, because their n_namesz is 5 for "CORE".
*/
if ((nd->flags & KDUMP_ELF64) && (note->n_namesz == 5))
uptr = (ulonglong *)(ptr + ((note->n_namesz + 3) & ~3));
if (xen_core)
uptr = (ulonglong *)roundup((ulong)uptr, 4);
}
if (store && qemuinfo) {
for(i=0; i<NR_CPUS; i++) {
if (!nd->nt_qemu_percpu[i]) {
nd->nt_qemu_percpu[i] = (void *)uptr;
nd->num_qemu_notes++;
break;
}
}
}
if (BITS32() && (xen_core || (note->n_type == NT_PRSTATUS))) {
iptr = (int *)uptr;
for (i = lf = 0; i < note->n_descsz/sizeof(ulong); i++) {
if (((i%4)==0)) {
netdump_print("%s ",
i ? "\n" : "");
lf++;
} else
lf = 0;
netdump_print("%08lx ", *iptr++);
}
} else if (vmcoreinfo || eraseinfo) {
netdump_print(" ");
ptr += note->n_namesz + 1;
for (i = 0; i < note->n_descsz; i++, ptr++) {
netdump_print("%c", *ptr);
if (*ptr == '\n')
netdump_print(" ");
}
lf = 0;
} else if (note->n_descsz == 4) {
i = 0; lf = 1;
iptr = (int *)uptr;
netdump_print(" %08lx\n", *iptr);
} else {
for (i = lf = 0; i < note->n_descsz/sizeof(ulonglong); i++) {
if (((i%2)==0)) {
netdump_print("%s ",
i ? "\n" : "");
lf++;
} else
lf = 0;
netdump_print("%016llx ", *uptr++);
}
}
if (!lf)
netdump_print("\n");
else if (i && (i&1))
netdump_print("\n");
len = sizeof(Elf64_Nhdr);
len = roundup(len + note->n_namesz, 4);
len = roundup(len + note->n_descsz, 4);
return len;
}
/*
* Send the request to the proper architecture hander.
*/
void
get_netdump_regs(struct bt_info *bt, ulong *eip, ulong *esp)
{
int e_machine;
if (nd->elf32)
e_machine = nd->elf32->e_machine;
else if (nd->elf64)
e_machine = nd->elf64->e_machine;
else
e_machine = EM_NONE;
switch (e_machine)
{
case EM_386:
return get_netdump_regs_x86(bt, eip, esp);
break;
case EM_IA_64:
/* For normal backtraces, this information will be obtained
* frome the switch_stack structure, which is pointed to by
* the thread.ksp field of the task_struct. But it's still
* needed by the "bt -t" option.
*/
machdep->get_stack_frame(bt, eip, esp);
break;
case EM_PPC:
return get_netdump_regs_ppc(bt, eip, esp);
break;
case EM_PPC64:
return get_netdump_regs_ppc64(bt, eip, esp);
break;
case EM_X86_64:
return get_netdump_regs_x86_64(bt, eip, esp);
break;
case EM_S390:
machdep->get_stack_frame(bt, eip, esp);
break;
case EM_ARM:
return get_netdump_regs_arm(bt, eip, esp);
break;
case EM_AARCH64:
return get_netdump_regs_arm64(bt, eip, esp);
break;
default:
error(FATAL,
"support for ELF machine type %d not available\n",
e_machine);
}
}
/*
* get regs from elf note, and return the address of user_regs.
*/
static char *
get_regs_from_note(char *note, ulong *ip, ulong *sp)
{
Elf32_Nhdr *note32;
Elf64_Nhdr *note64;
size_t len;
char *user_regs;
long offset_sp, offset_ip;
if (machine_type("X86_64")) {
note64 = (Elf64_Nhdr *)note;
len = sizeof(Elf64_Nhdr);
len = roundup(len + note64->n_namesz, 4);
len = roundup(len + note64->n_descsz, 4);
offset_sp = OFFSET(user_regs_struct_rsp);
offset_ip = OFFSET(user_regs_struct_rip);
} else if (machine_type("X86")) {
note32 = (Elf32_Nhdr *)note;
len = sizeof(Elf32_Nhdr);
len = roundup(len + note32->n_namesz, 4);
len = roundup(len + note32->n_descsz, 4);
offset_sp = OFFSET(user_regs_struct_esp);
offset_ip = OFFSET(user_regs_struct_eip);
} else
return NULL;
user_regs = note + len - SIZE(user_regs_struct) - sizeof(long);
*sp = ULONG(user_regs + offset_sp);
*ip = ULONG(user_regs + offset_ip);
return user_regs;
}
static void
display_regs_from_elf_notes(int cpu)
{
Elf32_Nhdr *note32;
Elf64_Nhdr *note64;
size_t len;
char *user_regs;
if (cpu >= nd->num_prstatus_notes) {
error(INFO, "registers not collected for cpu %d\n", cpu);
return;
}
if (machine_type("X86_64")) {
if (nd->num_prstatus_notes > 1)
note64 = (Elf64_Nhdr *)
nd->nt_prstatus_percpu[cpu];
else
note64 = (Elf64_Nhdr *)nd->nt_prstatus;
len = sizeof(Elf64_Nhdr);
len = roundup(len + note64->n_namesz, 4);
len = roundup(len + note64->n_descsz, 4);
user_regs = ((char *)note64) + len - SIZE(user_regs_struct) - sizeof(long);
fprintf(fp,
" RIP: %016llx RSP: %016llx RFLAGS: %08llx\n"
" RAX: %016llx RBX: %016llx RCX: %016llx\n"
" RDX: %016llx RSI: %016llx RDI: %016llx\n"
" RBP: %016llx R8: %016llx R9: %016llx\n"
" R10: %016llx R11: %016llx R12: %016llx\n"
" R13: %016llx R14: %016llx R15: %016llx\n"
" CS: %04x SS: %04x\n",
ULONGLONG(user_regs + OFFSET(user_regs_struct_rip)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_rsp)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_eflags)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_rax)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_rbx)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_rcx)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_rdx)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_rsi)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_rdi)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_rbp)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_r8)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_r9)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_r10)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_r11)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_r12)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_r13)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_r14)),
ULONGLONG(user_regs + OFFSET(user_regs_struct_r15)),
USHORT(user_regs + OFFSET(user_regs_struct_cs)),
USHORT(user_regs + OFFSET(user_regs_struct_ss))
);
} else if (machine_type("X86")) {
if (nd->num_prstatus_notes > 1)
note32 = (Elf32_Nhdr *)
nd->nt_prstatus_percpu[cpu];
else
note32 = (Elf32_Nhdr *)nd->nt_prstatus;
len = sizeof(Elf32_Nhdr);
len = roundup(len + note32->n_namesz, 4);
len = roundup(len + note32->n_descsz, 4);
user_regs = ((char *)note32) + len - SIZE(user_regs_struct) - sizeof(long);
fprintf(fp,
" EAX: %08x EBX: %08x ECX: %08x EDX: %08x\n"
" ESP: %08x EIP: %08x ESI: %08x EDI: %08x\n"
" CS: %04x DS: %04x ES: %04x FS: %04x\n"
" GS: %04x SS: %04x\n"
" EBP: %08x EFLAGS: %08x\n",
UINT(user_regs + OFFSET(user_regs_struct_eax)),
UINT(user_regs + OFFSET(user_regs_struct_ebx)),
UINT(user_regs + OFFSET(user_regs_struct_ecx)),
UINT(user_regs + OFFSET(user_regs_struct_edx)),
UINT(user_regs + OFFSET(user_regs_struct_esp)),
UINT(user_regs + OFFSET(user_regs_struct_eip)),
UINT(user_regs + OFFSET(user_regs_struct_esi)),
UINT(user_regs + OFFSET(user_regs_struct_edi)),
USHORT(user_regs + OFFSET(user_regs_struct_cs)),
USHORT(user_regs + OFFSET(user_regs_struct_ds)),
USHORT(user_regs + OFFSET(user_regs_struct_es)),
USHORT(user_regs + OFFSET(user_regs_struct_fs)),
USHORT(user_regs + OFFSET(user_regs_struct_gs)),
USHORT(user_regs + OFFSET(user_regs_struct_ss)),
UINT(user_regs + OFFSET(user_regs_struct_ebp)),
UINT(user_regs + OFFSET(user_regs_struct_eflags))
);
} else if (machine_type("ARM64")) {
if (nd->num_prstatus_notes > 1)
note64 = (Elf64_Nhdr *)
nd->nt_prstatus_percpu[cpu];
else
note64 = (Elf64_Nhdr *)nd->nt_prstatus;
len = sizeof(Elf64_Nhdr);
len = roundup(len + note64->n_namesz, 4);
len = roundup(len + note64->n_descsz, 4);
// user_regs = ((char *)note64) + len - SIZE(user_regs_struct) - sizeof(long);
fprintf(fp, "display_regs_from_elf_notes: ARM64 register dump TBD\n");
}
}
void
dump_registers_for_elf_dumpfiles(void)
{
int c;
if (!(machine_type("X86") || machine_type("X86_64") || machine_type("ARM64")))
error(FATAL, "-r option not supported for this dumpfile\n");
if (NETDUMP_DUMPFILE()) {
display_regs_from_elf_notes(0);
return;
}
for (c = 0; c < kt->cpus; c++) {
fprintf(fp, "%sCPU %d:\n", c ? "\n" : "", c);
display_regs_from_elf_notes(c);
}
}
struct x86_64_user_regs_struct {
unsigned long r15,r14,r13,r12,rbp,rbx,r11,r10;
unsigned long r9,r8,rax,rcx,rdx,rsi,rdi,orig_rax;
unsigned long rip,cs,eflags;
unsigned long rsp,ss;
unsigned long fs_base, gs_base;
unsigned long ds,es,fs,gs;
};
void
get_netdump_regs_x86_64(struct bt_info *bt, ulong *ripp, ulong *rspp)
{
Elf64_Nhdr *note;
size_t len;
char *user_regs;
ulong regs_size, rsp_offset, rip_offset;
ulong rip, rsp;
if (is_task_active(bt->task))
bt->flags |= BT_DUMPFILE_SEARCH;
if (((NETDUMP_DUMPFILE() || KDUMP_DUMPFILE()) &&
VALID_STRUCT(user_regs_struct) && (bt->task == tt->panic_task)) ||
(KDUMP_DUMPFILE() && (kt->flags & DWARF_UNWIND) &&
(bt->flags & BT_DUMPFILE_SEARCH))) {
if (nd->num_prstatus_notes > 1)
note = (Elf64_Nhdr *)
nd->nt_prstatus_percpu[bt->tc->processor];
else
note = (Elf64_Nhdr *)nd->nt_prstatus;
if (!note)
goto no_nt_prstatus_exists;
len = sizeof(Elf64_Nhdr);
len = roundup(len + note->n_namesz, 4);
len = roundup(len + note->n_descsz, 4);
regs_size = VALID_STRUCT(user_regs_struct) ?
SIZE(user_regs_struct) :
sizeof(struct x86_64_user_regs_struct);
rsp_offset = VALID_MEMBER(user_regs_struct_rsp) ?
OFFSET(user_regs_struct_rsp) :
offsetof(struct x86_64_user_regs_struct, rsp);
rip_offset = VALID_MEMBER(user_regs_struct_rip) ?
OFFSET(user_regs_struct_rip) :
offsetof(struct x86_64_user_regs_struct, rip);
user_regs = ((char *)note + len) - regs_size - sizeof(long);
rsp = ULONG(user_regs + rsp_offset);
rip = ULONG(user_regs + rip_offset);
if (INSTACK(rsp, bt) ||
in_alternate_stack(bt->tc->processor, rsp)) {
if (CRASHDEBUG(1))
netdump_print("ELF prstatus rsp: %lx rip: %lx\n",
rsp, rip);
if (KDUMP_DUMPFILE()) {
*rspp = rsp;
*ripp = rip;
if (*ripp && *rspp)
bt->flags |= BT_KDUMP_ELF_REGS;
}
bt->machdep = (void *)user_regs;
}
}
if (ELF_NOTES_VALID() &&
(bt->flags & BT_DUMPFILE_SEARCH) && DISKDUMP_DUMPFILE() &&
(note = (Elf64_Nhdr *)
diskdump_get_prstatus_percpu(bt->tc->processor))) {
if (!note)
goto no_nt_prstatus_exists;
user_regs = get_regs_from_note((char *)note, &rip, &rsp);
if (INSTACK(rsp, bt) ||
in_alternate_stack(bt->tc->processor, rsp)) {
if (CRASHDEBUG(1))
netdump_print("ELF prstatus rsp: %lx rip: %lx\n",
rsp, rip);
*rspp = rsp;
*ripp = rip;
if (*ripp && *rspp)
bt->flags |= BT_KDUMP_ELF_REGS;
bt->machdep = (void *)user_regs;
}
}
no_nt_prstatus_exists:
machdep->get_stack_frame(bt, ripp, rspp);
}
/*
* Netdump doesn't save state of the active tasks in the TSS, so poke around
* the raw stack for some reasonable hooks.
*/
void
get_netdump_regs_x86(struct bt_info *bt, ulong *eip, ulong *esp)
{
int i, search, panic, panic_task, altered;
char *sym;
ulong *up;
ulong ipintr_eip, ipintr_esp, ipintr_func;
ulong halt_eip, halt_esp, panic_eip, panic_esp;
int check_hardirq, check_softirq;
ulong stackbase, stacktop;
Elf32_Nhdr *note;
char *user_regs ATTRIBUTE_UNUSED;
ulong ip, sp;
if (!is_task_active(bt->task)) {
machdep->get_stack_frame(bt, eip, esp);
return;
}
panic_task = tt->panic_task == bt->task ? TRUE : FALSE;
ipintr_eip = ipintr_esp = ipintr_func = panic = altered = 0;
halt_eip = halt_esp = panic_eip = panic_esp = 0;
check_hardirq = check_softirq = tt->flags & IRQSTACKS ? TRUE : FALSE;
search = ((bt->flags & BT_TEXT_SYMBOLS) && (tt->flags & TASK_INIT_DONE))
|| (machdep->flags & OMIT_FRAME_PTR);
stackbase = bt->stackbase;
stacktop = bt->stacktop;
retry:
for (i = 0, up = (ulong *)bt->stackbuf; i < LONGS_PER_STACK; i++, up++){
sym = closest_symbol(*up);
if (XEN_CORE_DUMPFILE()) {
if (STREQ(sym, "xen_machine_kexec")) {
*eip = *up;
*esp = bt->stackbase + ((char *)(up+1) - bt->stackbuf);
return;
}
if (STREQ(sym, "crash_kexec")) {
halt_eip = *up;
halt_esp = bt->stackbase + ((char *)(up+1) - bt->stackbuf);
}
} else if (STREQ(sym, "netconsole_netdump") ||
STREQ(sym, "netpoll_start_netdump") ||
STREQ(sym, "start_disk_dump") ||
(STREQ(sym, "crash_kexec") && !KVMDUMP_DUMPFILE()) ||
STREQ(sym, "disk_dump")) {
crash_kexec:
*eip = *up;
*esp = search ?
bt->stackbase + ((char *)(up+1) - bt->stackbuf) :
*(up-1);
return;
}
if (STREQ(sym, "panic")) {
*eip = *up;
*esp = search ?
bt->stackbase + ((char *)(up+1) - bt->stackbuf) :
*(up-1);
panic_eip = *eip;
panic_esp = *esp;
panic = TRUE;
continue; /* keep looking for die */
}
if (STREQ(sym, "die")) {
*eip = *up;
*esp = search ?
bt->stackbase + ((char *)(up+1) - bt->stackbuf) :
*(up-1);
for (i++, up++; i < LONGS_PER_STACK; i++, up++) {
sym = closest_symbol(*up);
if (STREQ(sym, "sysrq_handle_crash"))
goto next_sysrq;
}
return;
}
if (STREQ(sym, "sysrq_handle_crash")) {
next_sysrq:
*eip = *up;
*esp = bt->stackbase + ((char *)(up+4) - bt->stackbuf);
pc->flags |= SYSRQ;
for (i++, up++; i < LONGS_PER_STACK; i++, up++) {
sym = closest_symbol(*up);
if (STREQ(sym, "crash_kexec") && !KVMDUMP_DUMPFILE())
goto crash_kexec;
if (STREQ(sym, "sysrq_handle_crash"))
goto next_sysrq;
}
if (!panic)
return;
}
/*
* Obsolete -- replaced by sysrq_handle_crash
*/
if (STREQ(sym, "sysrq_handle_netdump")) {
*eip = *up;
*esp = search ?
bt->stackbase + ((char *)(up+1) - bt->stackbuf) :
*(up-1);
pc->flags |= SYSRQ;
return;
}
if (STREQ(sym, "crash_nmi_callback")) {
*eip = *up;
*esp = search ?
bt->stackbase + ((char *)(up+1) - bt->stackbuf) :
*(up-1);
return;
}
if (STREQ(sym, "stop_this_cpu")) {
*eip = *up;
*esp = search ?
bt->stackbase + ((char *)(up+1) - bt->stackbuf) :
*(up-1);
return;
}
if (STREQ(sym, "smp_call_function_interrupt")) {
if (ipintr_eip && IS_VMALLOC_ADDR(ipintr_func) &&
IS_KERNEL_STATIC_TEXT(*(up - 2)))
continue;
ipintr_eip = *up;
ipintr_esp = search ?
bt->stackbase + ((char *)(up+1) - bt->stackbuf) :
bt->stackbase + ((char *)(up-1) - bt->stackbuf);
ipintr_func = *(up - 2);
}
if (XEN_CORE_DUMPFILE() && !panic_task && (bt->tc->pid == 0) &&
STREQ(sym, "safe_halt")) {
halt_eip = *up;
halt_esp = bt->stackbase + ((char *)(up+1) - bt->stackbuf);
}
if (XEN_CORE_DUMPFILE() && !panic_task && (bt->tc->pid == 0) &&
!halt_eip && STREQ(sym, "xen_idle")) {
halt_eip = *up;
halt_esp = bt->stackbase + ((char *)(up+1) - bt->stackbuf);
}
}
if (panic) {
*eip = panic_eip;
*esp = panic_esp;
return;
}
if (ipintr_eip) {
*eip = ipintr_eip;
*esp = ipintr_esp;
return;
}
if (halt_eip && halt_esp) {
*eip = halt_eip;
*esp = halt_esp;
return;
}
bt->flags &= ~(BT_HARDIRQ|BT_SOFTIRQ);
if (check_hardirq &&
(tt->hardirq_tasks[bt->tc->processor] == bt->tc->task)) {
bt->stackbase = tt->hardirq_ctx[bt->tc->processor];
bt->stacktop = bt->stackbase + STACKSIZE();
alter_stackbuf(bt);
bt->flags |= BT_HARDIRQ;
check_hardirq = FALSE;
altered = TRUE;
goto retry;
}
if (check_softirq &&
(tt->softirq_tasks[bt->tc->processor] == bt->tc->task)) {
bt->stackbase = tt->softirq_ctx[bt->tc->processor];
bt->stacktop = bt->stackbase + STACKSIZE();
alter_stackbuf(bt);
bt->flags |= BT_SOFTIRQ;
check_softirq = FALSE;
altered = TRUE;
goto retry;
}
if (ELF_NOTES_VALID() && DISKDUMP_DUMPFILE() &&
(note = (Elf32_Nhdr *)
diskdump_get_prstatus_percpu(bt->tc->processor))) {
user_regs = get_regs_from_note((char *)note, &ip, &sp);
if (is_kernel_text(ip) &&
(((sp >= GET_STACKBASE(bt->task)) &&
(sp < GET_STACKTOP(bt->task))) ||
in_alternate_stack(bt->tc->processor, sp))) {
bt->flags |= BT_KERNEL_SPACE;
*eip = ip;
*esp = sp;
return;
}
if (!is_kernel_text(ip) && in_user_stack(bt->tc->task, sp)) {
bt->flags |= BT_USER_SPACE;
*eip = ip;
*esp = sp;
return;
}
}
if (CRASHDEBUG(1))
error(INFO,
"get_netdump_regs_x86: cannot find anything useful (task: %lx)\n", bt->task);
if (altered) {
bt->stackbase = stackbase;
bt->stacktop = stacktop;
alter_stackbuf(bt);
}
if (XEN_CORE_DUMPFILE() && !panic_task && is_task_active(bt->task) &&
!(bt->flags & (BT_TEXT_SYMBOLS_ALL|BT_TEXT_SYMBOLS)))
error(FATAL,
"starting backtrace locations of the active (non-crashing) "
"xen tasks\n cannot be determined: try -t or -T options\n");
if (KVMDUMP_DUMPFILE() || SADUMP_DUMPFILE())
bt->flags &= ~(ulonglong)BT_DUMPFILE_SEARCH;
machdep->get_stack_frame(bt, eip, esp);
}
static void
get_netdump_regs_ppc(struct bt_info *bt, ulong *eip, ulong *esp)
{
Elf32_Nhdr *note;
size_t len;
ppc_relocate_nt_prstatus_percpu(nd->nt_prstatus_percpu,
&nd->num_prstatus_notes);
if ((bt->task == tt->panic_task) ||
(is_task_active(bt->task) && nd->num_prstatus_notes > 1)) {
/*
* Registers are saved during the dump process for the
* panic task. Whereas in kdump, regs are captured for all
* CPUs if they responded to an IPI.
*/
if (nd->num_prstatus_notes > 1) {
if (!nd->nt_prstatus_percpu[bt->tc->processor])
error(FATAL,
"cannot determine NT_PRSTATUS ELF note "
"for %s task: %lx\n",
(bt->task == tt->panic_task) ?
"panic" : "active", bt->task);
note = (Elf32_Nhdr *)
nd->nt_prstatus_percpu[bt->tc->processor];
} else
note = (Elf32_Nhdr *)nd->nt_prstatus;
if (!note)
goto no_nt_prstatus_exists;
len = sizeof(Elf32_Nhdr);
len = roundup(len + note->n_namesz, 4);
bt->machdep = (void *)((char *)note + len +
MEMBER_OFFSET("elf_prstatus", "pr_reg"));
}
no_nt_prstatus_exists:
machdep->get_stack_frame(bt, eip, esp);
}
static void
get_netdump_regs_ppc64(struct bt_info *bt, ulong *eip, ulong *esp)
{
Elf64_Nhdr *note;
size_t len;
if ((bt->task == tt->panic_task) ||
(is_task_active(bt->task) && nd->num_prstatus_notes > 1)) {
/*
* Registers are saved during the dump process for the
* panic task. Whereas in kdump, regs are captured for all
* CPUs if they responded to an IPI.
*/
if (nd->num_prstatus_notes > 1) {
if (!nd->nt_prstatus_percpu[bt->tc->processor])
error(FATAL,
"cannot determine NT_PRSTATUS ELF note "
"for %s task: %lx\n",
(bt->task == tt->panic_task) ?
"panic" : "active", bt->task);
note = (Elf64_Nhdr *)
nd->nt_prstatus_percpu[bt->tc->processor];
} else
note = (Elf64_Nhdr *)nd->nt_prstatus;
if (!note)
goto no_nt_prstatus_exists;
len = sizeof(Elf64_Nhdr);
len = roundup(len + note->n_namesz, 4);
bt->machdep = (void *)((char *)note + len +
MEMBER_OFFSET("elf_prstatus", "pr_reg"));
}
no_nt_prstatus_exists:
machdep->get_stack_frame(bt, eip, esp);
}
static void
get_netdump_regs_arm(struct bt_info *bt, ulong *eip, ulong *esp)
{
machdep->get_stack_frame(bt, eip, esp);
}
static void
get_netdump_regs_arm64(struct bt_info *bt, ulong *eip, ulong *esp)
{
machdep->get_stack_frame(bt, eip, esp);
}
int
is_partial_netdump(void)
{
return (nd->flags & PARTIAL_DUMP ? TRUE : FALSE);
}
/*
* kexec/kdump generated vmcore files are similar enough in
* nature to netdump/diskdump such that most vmcore access
* functionality may be borrowed from the equivalent netdump
* function. If not, re-work them here.
*/
int
is_kdump(char *file, ulong source_query)
{
return is_netdump(file, source_query);
}
int
kdump_init(char *unused, FILE *fptr)
{
return netdump_init(unused, fptr);
}
ulong
get_kdump_panic_task(void)
{
return get_netdump_panic_task();
}
int
read_kdump(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
physaddr_t paddr_in = paddr;
if ((nd->flags & QEMU_MEM_DUMP_KDUMP_BACKUP) &&
(paddr >= nd->backup_src_start) &&
(paddr < nd->backup_src_start + nd->backup_src_size)) {
paddr += nd->backup_offset - nd->backup_src_start;
if (CRASHDEBUG(1))
error(INFO,
"qemu_mem_dump: kdump backup region: %#llx => %#llx\n",
paddr_in, paddr);
}
if (XEN_CORE_DUMPFILE() && !XEN_HYPER_MODE()) {
if (!(nd->xen_kdump_data->flags & KDUMP_P2M_INIT)) {
if (!machdep->xen_kdump_p2m_create)
error(FATAL,
"xen kdump dumpfiles not supported on this architecture\n");
if ((nd->xen_kdump_data->page =
(char *)malloc(PAGESIZE())) == NULL)
error(FATAL,
"cannot malloc xen kdump data page\n");
if (!machdep->xen_kdump_p2m_create(nd->xen_kdump_data))
error(FATAL,
"cannot create xen kdump pfn-to-mfn mapping\n");
nd->xen_kdump_data->flags |= KDUMP_P2M_INIT;
}
if ((paddr = xen_kdump_p2m(paddr)) == P2M_FAILURE) {
if (CRASHDEBUG(8))
fprintf(fp, "read_kdump: xen_kdump_p2m(%llx): "
"P2M_FAILURE\n", (ulonglong)paddr_in);
return READ_ERROR;
}
if (CRASHDEBUG(8))
fprintf(fp, "read_kdump: xen_kdump_p2m(%llx): %llx\n",
(ulonglong)paddr_in, (ulonglong)paddr);
}
return read_netdump(fd, bufptr, cnt, addr, paddr);
}
int
write_kdump(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
return write_netdump(fd, bufptr, cnt, addr, paddr);
}
void
get_kdump_regs(struct bt_info *bt, ulong *eip, ulong *esp)
{
get_netdump_regs(bt, eip, esp);
}
uint
kdump_page_size(void)
{
uint pagesz;
if (!VMCORE_VALID())
return 0;
if (!(pagesz = nd->page_size))
pagesz = (uint)getpagesize();
return pagesz;
}
int
kdump_free_memory(void)
{
return netdump_free_memory();
}
int
kdump_memory_used(void)
{
return netdump_memory_used();
}
int
kdump_memory_dump(FILE *fp)
{
return netdump_memory_dump(fp);
}
/*
* Translate a xen domain's pseudo-physical address into the
* xen machine address. Since there's no compression involved,
* just the last phys_to_machine_mapping[] page read is cached,
* which essentially caches 1024 p2m translations.
*/
static physaddr_t
xen_kdump_p2m(physaddr_t pseudo)
{
ulong pfn, mfn_frame;
ulong *mfnptr;
ulong mfn_idx, frame_idx;
physaddr_t paddr;
struct xen_kdump_data *xkd = nd->xen_kdump_data;
if (pc->curcmd_flags & XEN_MACHINE_ADDR)
return pseudo;
#ifdef IA64
return ia64_xen_kdump_p2m(xkd, pseudo);
#endif
xkd->accesses++;
pfn = (ulong)BTOP(pseudo);
mfn_idx = pfn / (PAGESIZE()/sizeof(ulong));
frame_idx = pfn % (PAGESIZE()/sizeof(ulong));
if (mfn_idx >= xkd->p2m_frames) {
if (CRASHDEBUG(8))
fprintf(fp, "xen_kdump_p2m: paddr/pfn: %llx/%lx: "
"mfn_idx nonexistent\n",
(ulonglong)pseudo, pfn);
return P2M_FAILURE;
}
mfn_frame = xkd->p2m_mfn_frame_list[mfn_idx];
if (mfn_frame == xkd->last_mfn_read)
xkd->cache_hits++;
else {
if (CRASHDEBUG(8))
fprintf(fp, "xen_kdump_p2m: paddr/pfn: %llx/%lx: "
"read mfn_frame: %llx\n",
(ulonglong)pseudo, pfn, PTOB(mfn_frame));
if (read_netdump(0, xkd->page, PAGESIZE(), 0,
(physaddr_t)PTOB(mfn_frame)) != PAGESIZE())
return P2M_FAILURE;
}
xkd->last_mfn_read = mfn_frame;
mfnptr = ((ulong *)(xkd->page)) + frame_idx;
paddr = (physaddr_t)PTOB((ulonglong)(*mfnptr));
paddr |= PAGEOFFSET(pseudo);
if (CRASHDEBUG(7))
fprintf(fp,
"xen_kdump_p2m(%llx): mfn_idx: %ld frame_idx: %ld"
" mfn_frame: %lx mfn: %lx => %llx\n",
(ulonglong)pseudo, mfn_idx, frame_idx,
mfn_frame, *mfnptr, (ulonglong)paddr);
return paddr;
}
struct vmcore_data *
get_kdump_vmcore_data(void)
{
if (!VMCORE_VALID() || !KDUMP_DUMPFILE())
return NULL;
return &vmcore_data;
}
/*
* Override the dom0 p2m mfn in the XEN_ELFNOTE_CRASH_INFO note
* in order to initiate a crash session of a guest kernel.
*/
void
xen_kdump_p2m_mfn(char *arg)
{
ulong value;
int errflag;
errflag = 0;
value = htol(arg, RETURN_ON_ERROR|QUIET, &errflag);
if (!errflag) {
xen_kdump_data.p2m_mfn = value;
if (CRASHDEBUG(1))
error(INFO,
"xen_kdump_data.p2m_mfn override: %lx\n",
value);
} else
error(WARNING, "invalid p2m_mfn argument: %s\n", arg);
}
/*
* Fujitsu dom0/HV sadump-generated dumpfile, which requires
* the --p2m_mfn command line argument.
*/
int
is_sadump_xen(void)
{
if (xen_kdump_data.p2m_mfn) {
if (!XEN_CORE_DUMPFILE()) {
pc->flags |= XEN_CORE;
nd->xen_kdump_data = &xen_kdump_data;
nd->xen_kdump_data->last_mfn_read = UNINITIALIZED;
nd->xen_kdump_data->last_pmd_read = UNINITIALIZED;
nd->xen_kdump_data->flags |= KDUMP_MFN_LIST;
}
return TRUE;
}
return FALSE;
}
void
set_xen_phys_start(char *arg)
{
ulong value;
int errflag = 0;
value = htol(arg, RETURN_ON_ERROR|QUIET, &errflag);
if (!errflag)
xen_kdump_data.xen_phys_start = value;
else
error(WARNING, "invalid xen_phys_start argument: %s\n", arg);
}
ulong
xen_phys_start(void)
{
return nd->xen_kdump_data->xen_phys_start;
}
int
xen_major_version(void)
{
return nd->xen_kdump_data->xen_major_version;
}
int
xen_minor_version(void)
{
return nd->xen_kdump_data->xen_minor_version;
}
/*
* The following set of functions are not used by the crash
* source code, but are available to extension modules for
* gathering register sets from ELF NT_PRSTATUS note sections.
*
* Contributed by: Sharyathi Nagesh (sharyath@in.ibm.com)
*/
static void *get_ppc_regs_from_elf_notes(struct task_context *);
static void *get_ppc64_regs_from_elf_notes(struct task_context *);
static void *get_x86_regs_from_elf_notes(struct task_context *);
static void *get_x86_64_regs_from_elf_notes(struct task_context *);
static void *get_arm_regs_from_elf_notes(struct task_context *);
int get_netdump_arch(void)
{
int e_machine;
if (nd->elf32)
e_machine = nd->elf32->e_machine;
else if (nd->elf64)
e_machine = nd->elf64->e_machine;
else
e_machine = EM_NONE;
return e_machine;
}
int
exist_regs_in_elf_notes(struct task_context *tc)
{
if ((tc->task == tt->panic_task) ||
(is_task_active(tc->task) && (nd->num_prstatus_notes > 1) &&
(tc->processor < nd->num_prstatus_notes)))
return TRUE;
else
return FALSE;
}
void *
get_regs_from_elf_notes(struct task_context *tc)
{
int e_machine = get_netdump_arch();
switch (e_machine)
{
case EM_386:
case EM_PPC:
case EM_PPC64:
case EM_X86_64:
case EM_ARM:
break;
case EM_AARCH64:
error(FATAL,
"get_regs_from_elf_notes: ARM64 support TBD\n");
default:
error(FATAL,
"support for ELF machine type %d not available\n",
e_machine);
}
if (!exist_regs_in_elf_notes(tc))
error(FATAL, "cannot determine register set "
"for active task: %lx comm: \"%s\"\n",
tc->task, tc->comm);
switch(e_machine)
{
case EM_386:
return get_x86_regs_from_elf_notes(tc);
case EM_PPC:
return get_ppc_regs_from_elf_notes(tc);
case EM_PPC64:
return get_ppc64_regs_from_elf_notes(tc);
case EM_X86_64:
return get_x86_64_regs_from_elf_notes(tc);
case EM_ARM:
return get_arm_regs_from_elf_notes(tc);
case EM_AARCH64:
break; /* TBD */
}
return NULL;
}
static void *
get_x86_regs_from_elf_notes(struct task_context *tc)
{
Elf32_Nhdr *note_32;
Elf64_Nhdr *note_64;
void *note;
size_t len;
void *pt_regs;
len = 0;
pt_regs = NULL;
if (nd->num_prstatus_notes > 1)
note = (void *)nd->nt_prstatus_percpu[tc->processor];
else
note = (void *)nd->nt_prstatus;
if (!note)
goto no_nt_prstatus_exists;
if (nd->elf32) {
note_32 = (Elf32_Nhdr *)note;
len = sizeof(Elf32_Nhdr);
len = roundup(len + note_32->n_namesz, 4);
} else if (nd->elf64) {
note_64 = (Elf64_Nhdr *)note;
len = sizeof(Elf64_Nhdr);
len = roundup(len + note_64->n_namesz, 4);
}
pt_regs = (void *)((char *)note + len +
MEMBER_OFFSET("elf_prstatus", "pr_reg"));
/* NEED TO BE FIXED: Hack to get the proper alignment */
pt_regs +=4;
no_nt_prstatus_exists:
return pt_regs;
}
static void *
get_x86_64_regs_from_elf_notes(struct task_context *tc)
{
Elf64_Nhdr *note;
size_t len;
void *pt_regs;
pt_regs = NULL;
if (nd->num_prstatus_notes > 1)
note = (Elf64_Nhdr *)nd->nt_prstatus_percpu[tc->processor];
else
note = (Elf64_Nhdr *)nd->nt_prstatus;
if (!note)
goto no_nt_prstatus_exists;
len = sizeof(Elf64_Nhdr);
len = roundup(len + note->n_namesz, 4);
pt_regs = (void *)((char *)note + len +
MEMBER_OFFSET("elf_prstatus", "pr_reg"));
no_nt_prstatus_exists:
return pt_regs;
}
static void *
get_ppc_regs_from_elf_notes(struct task_context *tc)
{
Elf32_Nhdr *note;
size_t len;
void *pt_regs;
extern struct vmcore_data *nd;
pt_regs = NULL;
/*
* Registers are always saved during the dump process for the
* panic task. Kdump also captures registers for all CPUs if
* they responded to an IPI.
*/
if (nd->num_prstatus_notes > 1) {
note = (Elf32_Nhdr *)nd->nt_prstatus_percpu[tc->processor];
} else
note = (Elf32_Nhdr *)nd->nt_prstatus;
if (!note)
goto no_nt_prstatus_exists;
len = sizeof(Elf32_Nhdr);
len = roundup(len + note->n_namesz, 4);
pt_regs = (void *)((char *)note + len +
MEMBER_OFFSET("elf_prstatus", "pr_reg"));
no_nt_prstatus_exists:
return pt_regs;
}
static void *
get_ppc64_regs_from_elf_notes(struct task_context *tc)
{
Elf64_Nhdr *note;
size_t len;
void *pt_regs;
extern struct vmcore_data *nd;
pt_regs = NULL;
/*
* Registers are always saved during the dump process for the
* panic task. Kdump also captures registers for all CPUs if
* they responded to an IPI.
*/
if (nd->num_prstatus_notes > 1) {
note = (Elf64_Nhdr *)nd->nt_prstatus_percpu[tc->processor];
} else
note = (Elf64_Nhdr *)nd->nt_prstatus;
if (!note)
goto no_nt_prstatus_exists;
len = sizeof(Elf64_Nhdr);
len = roundup(len + note->n_namesz, 4);
pt_regs = (void *)((char *)note + len +
MEMBER_OFFSET("elf_prstatus", "pr_reg"));
no_nt_prstatus_exists:
return pt_regs;
}
/*
* In case of ARM we need to determine correct PHYS_OFFSET from the kdump file.
* This is done by taking lowest physical address (LMA) from given load
* segments. Normally this is the right one.
*
* Alternative would be to store phys_base in VMCOREINFO but current kernel
* kdump doesn't do that yet.
*/
int arm_kdump_phys_base(ulong *phys_base)
{
struct pt_load_segment *pls;
ulong paddr = ULONG_MAX;
int i;
for (i = 0; i < nd->num_pt_load_segments; i++) {
pls = &nd->pt_load_segments[i];
if (pls->phys_start < paddr)
paddr = pls->phys_start;
}
if (paddr != ULONG_MAX) {
*phys_base = paddr;
return TRUE;
}
return FALSE;
}
static void *
get_arm_regs_from_elf_notes(struct task_context *tc)
{
Elf32_Nhdr *note_32;
Elf64_Nhdr *note_64;
void *note;
size_t len;
void *pt_regs;
len = 0;
pt_regs = NULL;
if (nd->num_prstatus_notes > 1)
note = (void *)nd->nt_prstatus_percpu[tc->processor];
else
note = (void *)nd->nt_prstatus;
if (!note)
goto no_nt_prstatus_exists;
if (nd->elf32) {
note_32 = (Elf32_Nhdr *)note;
len = sizeof(Elf32_Nhdr);
len = roundup(len + note_32->n_namesz, 4);
} else if (nd->elf64) {
note_64 = (Elf64_Nhdr *)note;
len = sizeof(Elf64_Nhdr);
len = roundup(len + note_64->n_namesz, 4);
}
pt_regs = (void *)((char *)note + len +
MEMBER_OFFSET("elf_prstatus", "pr_reg"));
no_nt_prstatus_exists:
return pt_regs;
}
/*
* Read from /proc/kcore.
*/
int
read_proc_kcore(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
int i;
size_t readcnt;
ulong kvaddr;
Elf32_Phdr *lp32;
Elf64_Phdr *lp64;
off_t offset;
if (!machdep->verify_paddr(paddr)) {
if (CRASHDEBUG(1))
error(INFO, "verify_paddr(%lx) failed\n", paddr);
return READ_ERROR;
}
/*
* Turn the physical address into a unity-mapped kernel
* virtual address, which should work for 64-bit architectures,
* and for lowmem access for 32-bit architectures.
*/
offset = UNINITIALIZED;
if (machine_type("ARM64"))
kvaddr = PTOV((ulong)paddr);
else
kvaddr = (ulong)paddr | machdep->kvbase;
readcnt = cnt;
switch (pkd->flags & (KCORE_ELF32|KCORE_ELF64))
{
case KCORE_ELF32:
for (i = 0; i < pkd->segments; i++) {
lp32 = pkd->load32 + i;
if ((kvaddr >= lp32->p_vaddr) &&
(kvaddr < (lp32->p_vaddr + lp32->p_memsz))) {
offset = (off_t)(kvaddr - lp32->p_vaddr) +
(off_t)lp32->p_offset;
break;
}
}
/*
* If it's not accessible via unity-mapping, check whether
* it's a request for a vmalloc address that can be found
* in the header.
*/
if (pc->curcmd_flags & MEMTYPE_KVADDR)
pc->curcmd_flags &= ~MEMTYPE_KVADDR;
else
break;
for (i = 0; i < pkd->segments; i++) {
lp32 = pkd->load32 + i;
if ((addr >= lp32->p_vaddr) &&
(addr < (lp32->p_vaddr + lp32->p_memsz))) {
offset = (off_t)(addr - lp32->p_vaddr) +
(off_t)lp32->p_offset;
break;
}
}
break;
case KCORE_ELF64:
for (i = 0; i < pkd->segments; i++) {
lp64 = pkd->load64 + i;
if ((kvaddr >= lp64->p_vaddr) &&
(kvaddr < (lp64->p_vaddr + lp64->p_memsz))) {
offset = (off_t)(kvaddr - lp64->p_vaddr) +
(off_t)lp64->p_offset;
break;
}
}
break;
}
if (offset == UNINITIALIZED)
return SEEK_ERROR;
if (lseek(fd, offset, SEEK_SET) != offset)
perror("lseek");
if (read(fd, bufptr, readcnt) != readcnt)
return READ_ERROR;
return cnt;
}
/*
* place holder -- cannot write to /proc/kcore
*/
int
write_proc_kcore(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
error(FATAL, "cannot write to /proc/kcore\n");
return FALSE;
}
int
is_proc_kcore(char *file, ulong source_query)
{
if (STREQ(file, "/proc/kcore") || same_file(file, "/proc/kcore")) {
if (!is_netdump(file, source_query))
error(FATAL,
"cannot translate the ELF header of /proc/kcore\n");
pkd->flags |= KCORE_LOCAL;
return TRUE;
} else
return FALSE;
}
int
proc_kcore_init(FILE *fp)
{
if (BITS32())
return proc_kcore_init_32(fp);
else
return proc_kcore_init_64(fp);
}
static int
proc_kcore_init_32(FILE *fp)
{
Elf32_Ehdr *elf32;
Elf32_Phdr *load32;
char eheader[MAX_KCORE_ELF_HEADER_SIZE];
char buf[BUFSIZE];
size_t size;
size = MAX_KCORE_ELF_HEADER_SIZE;
if (read(pc->mfd, eheader, size) != size) {
sprintf(buf, "/proc/kcore: read");
perror(buf);
goto bailout;
}
if (lseek(pc->mfd, 0, SEEK_SET) != 0) {
sprintf(buf, "/proc/kcore: lseek");
perror(buf);
goto bailout;
}
elf32 = (Elf32_Ehdr *)&eheader[0];
load32 = (Elf32_Phdr *)&eheader[sizeof(Elf32_Ehdr)+sizeof(Elf32_Phdr)];
pkd->segments = elf32->e_phnum - 1;
size = (ulong)(load32+(elf32->e_phnum)) - (ulong)elf32;
if ((pkd->elf_header = (char *)malloc(size)) == NULL) {
error(INFO, "/proc/kcore: cannot malloc ELF header buffer\n");
clean_exit(1);
}
BCOPY(&eheader[0], &pkd->elf_header[0], size);
pkd->elf32 = (Elf32_Ehdr *)pkd->elf_header;
pkd->load32 = (Elf32_Phdr *)
&pkd->elf_header[sizeof(Elf32_Ehdr)+sizeof(Elf32_Phdr)];
pkd->flags |= KCORE_ELF32;
if (CRASHDEBUG(1))
kcore_memory_dump(fp);
return TRUE;
bailout:
return FALSE;
}
static int
proc_kcore_init_64(FILE *fp)
{
Elf64_Ehdr *elf64;
Elf64_Phdr *load64;
char eheader[MAX_KCORE_ELF_HEADER_SIZE];
char buf[BUFSIZE];
size_t size;
size = MAX_KCORE_ELF_HEADER_SIZE;
if (read(pc->mfd, eheader, size) != size) {
sprintf(buf, "/proc/kcore: read");
perror(buf);
goto bailout;
}
if (lseek(pc->mfd, 0, SEEK_SET) != 0) {
sprintf(buf, "/proc/kcore: lseek");
perror(buf);
goto bailout;
}
elf64 = (Elf64_Ehdr *)&eheader[0];
load64 = (Elf64_Phdr *)&eheader[sizeof(Elf64_Ehdr)+sizeof(Elf64_Phdr)];
pkd->segments = elf64->e_phnum - 1;
size = (ulong)(load64+(elf64->e_phnum)) - (ulong)elf64;
if ((pkd->elf_header = (char *)malloc(size)) == NULL) {
error(INFO, "/proc/kcore: cannot malloc ELF header buffer\n");
clean_exit(1);
}
BCOPY(&eheader[0], &pkd->elf_header[0], size);
pkd->elf64 = (Elf64_Ehdr *)pkd->elf_header;
pkd->load64 = (Elf64_Phdr *)
&pkd->elf_header[sizeof(Elf64_Ehdr)+sizeof(Elf64_Phdr)];
pkd->flags |= KCORE_ELF64;
if (CRASHDEBUG(1))
kcore_memory_dump(fp);
return TRUE;
bailout:
return FALSE;
}
int
kcore_memory_dump(FILE *ofp)
{
int i, others;
Elf32_Phdr *lp32;
Elf64_Phdr *lp64;
if (!(pkd->flags & KCORE_LOCAL))
return FALSE;
fprintf(ofp, "proc_kcore_data:\n");
fprintf(ofp, " flags: %lx (", nd->flags);
others = 0;
if (pkd->flags & KCORE_LOCAL)
fprintf(ofp, "%sKCORE_LOCAL", others++ ? "|" : "");
if (pkd->flags & KCORE_ELF32)
fprintf(ofp, "%sKCORE_ELF32", others++ ? "|" : "");
if (pkd->flags & KCORE_ELF64)
fprintf(ofp, "%sKCORE_ELF64", others++ ? "|" : "");
fprintf(ofp, ")\n");
fprintf(ofp, " segments: %d\n",
pkd->segments);
fprintf(ofp, " elf_header: %lx\n", (ulong)pkd->elf_header);
fprintf(ofp, " elf64: %lx\n", (ulong)pkd->elf64);
fprintf(ofp, " load64: %lx\n", (ulong)pkd->load64);
fprintf(ofp, " elf32: %lx\n", (ulong)pkd->elf32);
fprintf(ofp, " load32: %lx\n\n", (ulong)pkd->load32);
for (i = 0; i < pkd->segments; i++) {
if (pkd->flags & KCORE_ELF32)
break;
lp64 = pkd->load64 + i;
fprintf(ofp, " Elf64_Phdr:\n");
fprintf(ofp, " p_type: %x\n", lp64->p_type);
fprintf(ofp, " p_flags: %x\n", lp64->p_flags);
fprintf(ofp, " p_offset: %llx\n", (ulonglong)lp64->p_offset);
fprintf(ofp, " p_vaddr: %llx\n", (ulonglong)lp64->p_vaddr);
fprintf(ofp, " p_paddr: %llx\n", (ulonglong)lp64->p_paddr);
fprintf(ofp, " p_filesz: %llx\n", (ulonglong)lp64->p_filesz);
fprintf(ofp, " p_memsz: %llx\n", (ulonglong)lp64->p_memsz);
fprintf(ofp, " p_align: %lld\n", (ulonglong)lp64->p_align);
fprintf(ofp, "\n");
}
for (i = 0; i < pkd->segments; i++) {
if (pkd->flags & KCORE_ELF64)
break;
lp32 = pkd->load32 + i;
fprintf(ofp, " Elf32_Phdr:\n");
fprintf(ofp, " p_type: %x\n", lp32->p_type);
fprintf(ofp, " p_flags: %x\n", lp32->p_flags);
fprintf(ofp, " p_offset: %x\n", lp32->p_offset);
fprintf(ofp, " p_vaddr: %x\n", lp32->p_vaddr);
fprintf(ofp, " p_paddr: %x\n", lp32->p_paddr);
fprintf(ofp, " p_filesz: %x\n", lp32->p_filesz);
fprintf(ofp, " p_memsz: %x\n", lp32->p_memsz);
fprintf(ofp, " p_align: %d\n", lp32->p_align);
fprintf(ofp, "\n");
}
return TRUE;
}
static void
kdump_get_osrelease(void)
{
char *string;
if ((string = vmcoreinfo_read_string("OSRELEASE"))) {
fprintf(fp, "%s\n", string);
free(string);
} else
pc->flags2 &= ~GET_OSRELEASE;
}
void
dump_registers_for_qemu_mem_dump(void)
{
int i;
QEMUCPUState *ptr;
FILE *fpsave;
fpsave = nd->ofp;
nd->ofp = fp;
for (i=0; i<nd->num_qemu_notes; i++) {
ptr = (QEMUCPUState *)nd->nt_qemu_percpu[i];
if (i)
netdump_print("\n");
netdump_print("CPU %d:\n", i);
if (CRASHDEBUG(1))
netdump_print(" version:%08lx size:%08lx\n",
ptr->version, ptr->size);
netdump_print(" rax:%016llx rbx:%016llx rcx:%016llx\n",
ptr->rax, ptr->rbx, ptr->rcx);
netdump_print(" rdx:%016llx rsi:%016llx rdi:%016llx\n",
ptr->rdx, ptr->rsi, ptr->rdi);
netdump_print(" rsp:%016llx rbp:%016llx ",
ptr->rsp, ptr->rbp);
if (DUMPFILE_FORMAT(nd->flags) == KDUMP_ELF64) {
netdump_print(" r8:%016llx\n",
ptr->r8);
netdump_print(" r9:%016llx r10:%016llx r11:%016llx\n",
ptr->r9, ptr->r10, ptr->r11);
netdump_print(" r12:%016llx r13:%016llx r14:%016llx\n",
ptr->r12, ptr->r13, ptr->r14);
netdump_print(" r15:%016llx",
ptr->r15);
} else
netdump_print("\n");
netdump_print(" rip:%016llx rflags:%08llx\n",
ptr->rip, ptr->rflags);
netdump_print(" cs:\n selector:%08lx limit:%08lx flags:%08lx\n\
pad:%08lx base:%016llx\n",
ptr->cs.selector, ptr->cs.limit, ptr->cs.flags,
ptr->cs.pad, ptr->cs.base);
netdump_print(" ds:\n selector:%08lx limit:%08lx flags:%08lx\n\
pad:%08lx base:%016llx\n",
ptr->ds.selector, ptr->ds.limit, ptr->ds.flags,
ptr->ds.pad, ptr->ds.base);
netdump_print(" es:\n selector:%08lx limit:%08lx flags:%08lx\n\
pad:%08lx base:%016llx\n",
ptr->es.selector, ptr->es.limit, ptr->es.flags,
ptr->es.pad, ptr->es.base);
netdump_print(" fs:\n selector:%08lx limit:%08lx flags:%08lx\n\
pad:%08lx base:%016llx\n",
ptr->fs.selector, ptr->fs.limit, ptr->fs.flags,
ptr->fs.pad, ptr->fs.base);
netdump_print(" gs:\n selector:%08lx limit:%08lx flags:%08lx\n\
pad:%08lx base:%016llx\n",
ptr->gs.selector, ptr->gs.limit, ptr->gs.flags,
ptr->gs.pad, ptr->gs.base);
netdump_print(" ss:\n selector:%08lx limit:%08lx flags:%08lx\n\
pad:%08lx base:%016llx\n",
ptr->ss.selector, ptr->ss.limit, ptr->ss.flags,
ptr->ss.pad, ptr->ss.base);
netdump_print(" ldt:\n selector:%08lx limit:%08lx flags:%08lx\n\
pad:%08lx base:%016llx\n",
ptr->ldt.selector, ptr->ldt.limit, ptr->ldt.flags,
ptr->ldt.pad, ptr->ldt.base);
netdump_print(" tr:\n selector:%08lx limit:%08lx flags:%08lx\n\
pad:%08lx base:%016llx\n",
ptr->tr.selector, ptr->tr.limit, ptr->tr.flags,
ptr->tr.pad, ptr->tr.base);
netdump_print(" gdt:\n selector:%08lx limit:%08lx flags:%08lx\n\
pad:%08lx base:%016llx\n",
ptr->gdt.selector, ptr->gdt.limit, ptr->gdt.flags,
ptr->gdt.pad, ptr->gdt.base);
netdump_print(" idt:\n selector:%08lx limit:%08lx flags:%08lx\n\
pad:%08lx base:%016llx\n",
ptr->idt.selector, ptr->idt.limit, ptr->idt.flags,
ptr->idt.pad, ptr->idt.base);
netdump_print(" cr[0]:%016llx cr[1]:%016llx cr[2]:%016llx\n",
ptr->cr[0], ptr->cr[1], ptr->cr[2]);
netdump_print(" cr[3]:%016llx cr[4]:%016llx\n",
ptr->cr[3], ptr->cr[4]);
}
nd->ofp = fpsave;
}
/*
* kdump saves the first 640kB physical memory for BIOS to use the
* range on boot of 2nd kernel. Read request to the 640k should be
* translated to the back up region. This function searches kexec
* resources for the backup region.
*/
void
kdump_backup_region_init(void)
{
char buf[BUFSIZE];
ulong i, total, kexec_crash_image_p, elfcorehdr_p;
Elf32_Off e_phoff32;
Elf64_Off e_phoff64;
uint16_t e_phnum, e_phentsize;
ulonglong backup_offset;
ulonglong backup_src_start;
ulong backup_src_size;
int kimage_segment_len;
size_t bufsize;
struct vmcore_data *vd;
struct sadump_data *sd;
int is_32_bit;
char typename[BUFSIZE];
e_phoff32 = e_phoff64 = 0;
vd = NULL;
sd = NULL;
if (SADUMP_DUMPFILE()) {
sd = get_sadump_data();
is_32_bit = FALSE;
sprintf(typename, "sadump");
} else if (pc->flags2 & QEMU_MEM_DUMP) {
vd = get_kdump_vmcore_data();
if (vd->flags & KDUMP_ELF32)
is_32_bit = TRUE;
else
is_32_bit = FALSE;
sprintf(typename, "qemu mem dump");
} else
return;
if (!readmem(symbol_value("kexec_crash_image"), KVADDR,
&kexec_crash_image_p, sizeof(ulong),
"kexec backup region: kexec_crash_image",
QUIET|RETURN_ON_ERROR))
goto error;
if (!kexec_crash_image_p) {
if (CRASHDEBUG(1))
error(INFO, "%s: kexec_crash_image not loaded\n", typename);
return;
}
kimage_segment_len = get_array_length("kimage.segment", NULL,
STRUCT_SIZE("kexec_segment"));
if (!readmem(kexec_crash_image_p + MEMBER_OFFSET("kimage", "segment"),
KVADDR, buf, MEMBER_SIZE("kimage", "segment"),
"kexec backup region: kexec_crash_image->segment",
QUIET|RETURN_ON_ERROR))
goto error;
elfcorehdr_p = 0;
for (i = 0; i < kimage_segment_len; ++i) {
char e_ident[EI_NIDENT];
ulong mem;
mem = ULONG(buf + i * STRUCT_SIZE("kexec_segment") +
MEMBER_OFFSET("kexec_segment", "mem"));
if (!mem)
continue;
if (!readmem(mem, PHYSADDR, e_ident, SELFMAG,
"elfcorehdr: e_ident",
QUIET|RETURN_ON_ERROR))
goto error;
if (strncmp(ELFMAG, e_ident, SELFMAG) == 0) {
elfcorehdr_p = mem;
break;
}
}
if (!elfcorehdr_p) {
if (CRASHDEBUG(1))
error(INFO,
"%s: elfcorehdr not found in segments of kexec_crash_image\n", typename);
goto error;
}
if (is_32_bit) {
if (!readmem(elfcorehdr_p, PHYSADDR, buf, STRUCT_SIZE("elf32_hdr"),
"elfcorehdr", QUIET|RETURN_ON_ERROR))
goto error;
e_phnum = USHORT(buf + MEMBER_OFFSET("elf32_hdr", "e_phnum"));
e_phentsize = USHORT(buf + MEMBER_OFFSET("elf32_hdr", "e_phentsize"));
e_phoff32 = ULONG(buf + MEMBER_OFFSET("elf32_hdr", "e_phoff"));
} else {
if (!readmem(elfcorehdr_p, PHYSADDR, buf, STRUCT_SIZE("elf64_hdr"),
"elfcorehdr", QUIET|RETURN_ON_ERROR))
goto error;
e_phnum = USHORT(buf + MEMBER_OFFSET("elf64_hdr", "e_phnum"));
e_phentsize = USHORT(buf + MEMBER_OFFSET("elf64_hdr", "e_phentsize"));
e_phoff64 = ULONG(buf + MEMBER_OFFSET("elf64_hdr", "e_phoff"));
}
backup_src_start = backup_src_size = backup_offset = 0;
for (i = 0; i < e_phnum; ++i) {
uint32_t p_type;
Elf32_Off p_offset32;
Elf64_Off p_offset64;
Elf32_Addr p_paddr32;
Elf64_Addr p_paddr64;
uint32_t p_memsz32;
uint64_t p_memsz64;
if (is_32_bit) {
if (!readmem(elfcorehdr_p + e_phoff32 + i * e_phentsize,
PHYSADDR, buf, e_phentsize,
"elfcorehdr: program header",
QUIET|RETURN_ON_ERROR))
goto error;
p_type = UINT(buf+MEMBER_OFFSET("elf32_phdr","p_type"));
p_offset32 = ULONG(buf+MEMBER_OFFSET("elf32_phdr","p_offset"));
p_paddr32 = ULONG(buf+MEMBER_OFFSET("elf32_phdr","p_paddr"));
p_memsz32 = ULONG(buf+MEMBER_OFFSET("elf32_phdr","p_memsz"));
} else {
if (!readmem(elfcorehdr_p + e_phoff64 + i * e_phentsize,
PHYSADDR, buf, e_phentsize,
"elfcorehdr: program header",
QUIET|RETURN_ON_ERROR))
goto error;
p_type = UINT(buf+MEMBER_OFFSET("elf64_phdr","p_type"));
p_offset64 = ULONG(buf+MEMBER_OFFSET("elf64_phdr","p_offset"));
p_paddr64 = ULONG(buf+MEMBER_OFFSET("elf64_phdr","p_paddr"));
p_memsz64 = ULONG(buf+MEMBER_OFFSET("elf64_phdr","p_memsz"));
}
/*
* kexec marks backup region PT_LOAD by assigning
* backup region address in p_offset, and p_addr in
* p_offsets for other PT_LOAD entries.
*/
if (is_32_bit) {
if (p_type == PT_LOAD &&
p_paddr32 <= KEXEC_BACKUP_SRC_END &&
p_paddr32 != p_offset32) {
backup_src_start = p_paddr32;
backup_src_size = p_memsz32;
backup_offset = p_offset32;
if (CRASHDEBUG(1))
error(INFO,
"%s: kexec backup region found: "
"START: %#016llx SIZE: %#016lx OFFSET: %#016llx\n",
typename, backup_src_start, backup_src_size, backup_offset);
break;
}
} else {
if (p_type == PT_LOAD &&
p_paddr64 <= KEXEC_BACKUP_SRC_END &&
p_paddr64 != p_offset64) {
backup_src_start = p_paddr64;
backup_src_size = p_memsz64;
backup_offset = p_offset64;
if (CRASHDEBUG(1))
error(INFO,
"%s: kexec backup region found: "
"START: %#016llx SIZE: %#016lx OFFSET: %#016llx\n",
typename, backup_src_start, backup_src_size, backup_offset);
break;
}
}
}
if (!backup_offset) {
if (CRASHDEBUG(1))
error(WARNING, "%s: backup region not found in elfcorehdr\n", typename);
return;
}
bufsize = BUFSIZE;
for (total = 0; total < backup_src_size; total += bufsize) {
char backup_buf[BUFSIZE];
int j;
if (backup_src_size - total < BUFSIZE)
bufsize = backup_src_size - total;
if (!readmem(backup_offset + total, PHYSADDR, backup_buf,
bufsize, "backup source", QUIET|RETURN_ON_ERROR))
goto error;
/*
* We're assuming the backup region is initialized
* with 0 filled if kdump has not run.
*/
for (j = 0; j < bufsize; ++j) {
if (backup_buf[j]) {
if (SADUMP_DUMPFILE()) {
sd->flags |= SADUMP_KDUMP_BACKUP;
sd->backup_src_start = backup_src_start;
sd->backup_src_size = backup_src_size;
sd->backup_offset = backup_offset;
} else if (pc->flags2 & QEMU_MEM_DUMP) {
vd->flags |= QEMU_MEM_DUMP_KDUMP_BACKUP;
vd->backup_src_start = backup_src_start;
vd->backup_src_size = backup_src_size;
vd->backup_offset = backup_offset;
}
if (CRASHDEBUG(1))
error(INFO, "%s: backup region is used: %llx\n", typename, backup_offset + total + j);
return;
}
}
}
if (CRASHDEBUG(1))
error(INFO, "%s: kexec backup region not used\n", typename);
return;
error:
error(WARNING, "failed to init kexec backup region\n");
}
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