/usr/src/blcr-0.8.2/vmadump4/vmadcheck.c is in blcr-dkms 0.8.2-15ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* vmadcheck.c: Dump file sanity checker (for debugging only)
*
* Copyright (C) 1999-2001 by Erik Hendriks <erik@hendriks.cx>
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: vmadcheck.c,v 1.7 2008/04/26 20:04:51 phargrov Exp $
*-----------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <stdint.h>
#include <signal.h>
/* Including these files is fairly perilous. */
#include <asm/page.h>
#include <asm/ptrace.h>
struct task_struct;
#include <asm/types.h>
#if defined(__i386__)
/*#include <asm/processor.h>*/
#endif
#if defined(__x86_64__)
#endif
#include "vmadump.h"
/* This stuff is here because the kernel and glibc disagree about signal datatypes */
#undef _NSIG
#undef _NSIG_BPW
#undef _NSIG_WORDS
#define _NSIG 64
#define _NSIG_BPW (sizeof(long)*8)
#define _NSIG_WORDS (_NSIG / _NSIG_BPW)
typedef struct {
unsigned long sig[_NSIG_WORDS];
} k_sigset_t;
struct k_sigaction {
void *ksa_handler;
unsigned long ksa_flags;
void *ksa_restorer;
k_sigset_t ksa_mask;
};
static
void read_check(int fd, void *p, size_t bytes) {
int r;
r = read(fd, p, bytes);
if (r < 0) {
fprintf(stderr, "Read error: %s\n", strerror(errno));
exit(1);
}
if (r != bytes) {
printf("Short file.\n");
exit(1);
}
}
static
void read_skip(int fd, size_t bytes) {
int len;
char buffer[PAGE_SIZE];
while (bytes > 0) {
len = bytes > PAGE_SIZE ? PAGE_SIZE : bytes;
read_check(fd, buffer, len);
bytes -= len;
}
}
#define PTRWIDTH ((int)(sizeof(void *)*2))
char *arch_names[] = {"","i386","sparc", "alpha", "ppc", "x86_64", "ppc64"};
#define MAX_ARCH ((sizeof(arch_names)/sizeof(char *))-1)
static char vmad_magic[4] = VMAD_MAGIC;
int main(int argc, char *argv[]) {
int fd, i;
char filename[PAGE_SIZE];
struct vmadump_header head;
struct vmadump_vma_header map;
struct vmadump_page_header page;
struct vmadump_mm_info mm;
struct vmadump_hook_header hook;
struct pt_regs regs;
k_sigset_t blocked;
struct k_sigaction sa;
if (argc != 2) {
fprintf(stderr, "Usage: %s dumpfile\n", argv[0]);
exit(0);
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror(argv[1]);
exit(1);
}
read_check(fd, &head, sizeof(head));
if (memcmp(head.magic, vmad_magic, sizeof(head.magic))) {
printf("Invalid magic number.\n");
exit(1);
}
printf("dump version: %d\n", (int) head.fmt_vers);
if (head.fmt_vers != VMAD_FMT_VERS) {
fprintf(stderr, "I only know about dump format version %d. (Sorry)\n", VMAD_FMT_VERS);
exit(1);
}
printf("kernel: %d.%d.%d\n",
(int) head.major, (int) head.minor, (int) head.patch);
if (head.arch <= MAX_ARCH)
printf("arch: %s\n", arch_names[head.arch]);
else
printf("arch: %d (unknown arch)\n", (int) head.arch);
if (head.arch != VMAD_ARCH) {
fprintf(stderr, "I can only inspect dumps from my own architecture. (Sorry)\n");
exit(1);
}
read_check(fd, filename, 16);
printf("comm: %s\n", filename);
{ int pid;
read_check(fd, &pid, sizeof(pid));
printf("pid: %d\n", pid);
}
read_check(fd, ®s, sizeof(regs));
/*---------------------------------------------------------------------
* There are a bunch of magical numbers being used in here for
* different cpu specific structure sizes. These are (were)
* correct but they might change at some point.
*-------------------------------------------------------------------*/
#if defined(__i386__)
{
uint32_t fpu[128]; /* union i387_union */
long debug[8], i;
char flag;
struct {
uint32_t a, b;
} tls[3]; /* 3 = GDT_ENTRY_TLS_ENTRIES */
uint32_t fs, gs;
printf("regs: eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx\n"
"regs: esi=%08lx edi=%08lx esp=%08lx ebp=%08lx\n"
"regs: eip=%08lx flgs=%08lx cs=%04x ss=%04x\n"
"regs: ds=%04x es=%04x\n",
regs.eax, regs.ebx, regs.ecx, regs.edx,
regs.esi, regs.edi, regs.esp, regs.ebp,
regs.eip, regs.eflags, regs.xcs, regs.xss,
regs.xds, regs.xes);
read_check(fd, &flag, sizeof(flag));
if (flag) {
read_check(fd, &fpu, sizeof(fpu));
printf("fpu: FPU state present.\n");
} else
printf("fpu: No FPU state.\n");
read_check(fd, debug, sizeof(long)*8);
printf("db: ");
for (i=0; i < 8; i++) printf(" %08lx", debug[i]);
printf("\n");
read_check(fd, &tls, sizeof(tls));
#define GET_BASE(desc) ( \
(((desc)->a >> 16) & 0x0000ffff) | \
(((desc)->b << 16) & 0x00ff0000) | \
( (desc)->b & 0xff000000) )
#define GET_LIMIT(desc) ( \
((desc)->a & 0x0ffff) | \
((desc)->b & 0xf0000) )
#define GET_PRESENT(desc) (((desc)->b >> 15) & 1)
for (i=0; i < 3; i++)
if (GET_PRESENT(&tls[i]))
printf("tls: %ld base=0x%08x limit=0x%08x\n", i,
GET_BASE(&tls[i]), GET_LIMIT(&tls[i]));
else
printf("tls: %ld (not present)\n", i);
read_check(fd, &fs, sizeof(fs));
read_check(fd, &gs, sizeof(gs));
printf("seg: fs=0x%04x gs=0x%04x\n", (int) fs, (int) gs);
}
#elif defined(__sparc__)
{
int i;
printf("regs: pc=%08lx npc=%08lx y=%08lx\n",
regs.pc, regs.npc, regs.y);
printf("regs: G");
for (i=UREG_G0; i <=UREG_G7; i++) printf(" %08lx", regs.u_regs[i]);
printf("\n");
printf("regs: I");
for (i=UREG_I0; i <=UREG_I7; i++) printf(" %08lx", regs.u_regs[i]);
printf("\n");
}
#elif defined(__alpha__)
{
struct switch_stack ss;
unsigned long usp;
read_check(fd, &ss, sizeof(ss));
read_check(fd, &usp, sizeof(usp));
printf("regs: pc = %016lx ra = %016lx ps = %04lx\n"
"regs: r0 = %016lx r1 = %016lx r2 = %016lx\n"
"regs: r3 = %016lx r4 = %016lx r5 = %016lx\n"
"regs: r6 = %016lx r7 = %016lx r8 = %016lx\n"
"regs: r9 = %016lx r10= %016lx r11= %016lx\n"
"regs: r12= %016lx r13= %016lx r14= %016lx\n"
"regs: r15= %016lx\n"
"regs: r16= %016lx r17= %016lx r18= %016lx\n"
"regs: r19= %016lx r20= %016lx r21= %016lx\n"
"regs: r22= %016lx r23= %016lx r24= %016lx\n"
"regs: r25= %016lx r27= %016lx r28= %016lx\n"
"regs: gp = %016lx sp = %016lx\n",
regs.pc, regs.r26, regs.ps,
regs.r0, regs.r1, regs.r2,
regs.r3, regs.r4, regs.r5,
regs.r6, regs.r7, regs.r8,
ss.r9, ss.r10, ss.r11,
ss.r12, ss.r13, ss.r14,
ss.r15,
regs.r16, regs.r17, regs.r18,
regs.r19, regs.r20, regs.r21,
regs.r22, regs.r23, regs.r24,
regs.r25, regs.r27, regs.r28,
regs.gp, usp);
}
#elif defined(powerpc)
{
double fpr[32];
unsigned long fpscr;
typedef struct {
__u32 u[4];
} vector128;
vector128 vr[32];
vector128 vscr;
read_check(fd, fpr, sizeof(fpr));
read_check(fd, &fpscr, sizeof(fpscr));
read_check(fd, vr, sizeof(vr));
read_check(fd, &vscr, sizeof(vscr));
for (i=0; i < 32; i++) {
if (i%4 == 0) printf("regs:");
printf(" r%02d = %08lx", i, regs.gpr[i]);
if (i%4 == 3) printf("\n");
}
for (i=0; i < 32; i++) {
if (i%4 == 0) printf("regs:");
printf(" fp%02d = %f", i, fpr[i]);
if (i%4 == 3) printf("\n");
}
printf("regs: fpscr = %08lx\n", fpscr);
/* XXX We're presuming altivec is present here */
for (i=0; i < 32; i++) {
if (i%2 == 0) printf("regs:");
printf(" av%02d = %08x%08x%08x%08x", i,
vr[i].u[0], vr[i].u[1], vr[i].u[2], vr[i].u[3]);
if (i%2 == 1) printf("\n");
}
printf("regs: vscr = %08x%08x%08x%08x\n",
vscr.u[0], vscr.u[1], vscr.u[2], vscr.u[3]);
}
#elif defined(__x86_64__)
{
struct i387_fxsave_struct {
uint16_t cwd;
uint16_t swd;
uint16_t twd;
uint16_t fop;
uint64_t rip;
uint64_t rdp;
uint32_t mxcsr;
uint32_t mxcsr_mask;
uint32_t st_space[32];
uint32_t xmm_space[64];
uint32_t padding[24];
} __attribute__ ((aligned (16)));
union i387_union {
struct i387_fxsave_struct fxsave;
};
union i387_union fpu;
long debug[8], i;
char flag;
unsigned long fs, gs;
uint16_t fsindex, gsindex;
struct {
uint32_t a, b;
} tls[3]; /* 3 = GDT_ENTRY_TLS_ENTRIES */
printf("regs: rax=%016lx rbx=%016lx\n"
"regs: rcx=%016lx rdx=%016lx\n"
"regs: rbp=%016lx rsi=%016lx\n"
"regs: rdi=%016lx rsp=%016lx\n"
"regs: r8 =%016lx r9 =%016lx\n"
"regs: r10=%016lx r11=%016lx\n"
"regs: r12=%016lx r13=%016lx\n"
"regs: r14=%016lx r15=%016lx\n"
"regs: rip=%016lx efl=%016lx\n",
regs.rax, regs.rbx, regs.rcx, regs.rdx,
regs.rbp, regs.rsi, regs.rdi, regs.rsp,
regs.r8, regs.r9, regs.r10, regs.r11,
regs.r12, regs.r13, regs.r14, regs.r15,
regs.rip, regs.eflags);
printf("regs: cs=%04lx ss=%04lx\n", regs.cs, regs.ss);
read_check(fd, &flag, sizeof(flag));
if (flag) {
read_check(fd, &fpu, sizeof(fpu));
printf("fpu: FPU state present.\n");
} else
printf("fpu: No FPU state.\n");
printf("seg: %d-bit Mode Process.\n", (regs.cs == 0x23) ? 32 : 64);
/* Segments and crap */
read_check(fd, &fs, sizeof(fs));
read_check(fd, &gs, sizeof(gs));
printf("seg: fs=%016lx gs=%016lx\n", fs, gs);
read_check(fd, &fsindex, sizeof(fsindex));
read_check(fd, &gsindex, sizeof(gsindex));
printf("seg: fsindex=%04x gsindex=%04x\n", fsindex, gsindex);
read_check(fd, &tls, sizeof(tls));
#define GET_BASE(desc) ( \
(((desc)->a >> 16) & 0x0000ffff) | \
(((desc)->b << 16) & 0x00ff0000) | \
( (desc)->b & 0xff000000) )
#define GET_LIMIT(desc) ( \
((desc)->a & 0x0ffff) | \
((desc)->b & 0xf0000) )
#define GET_PRESENT(desc) (((desc)->b >> 15) & 1)
for (i=0; i < 3; i++)
if (GET_PRESENT(&tls[i]))
printf("tls: %ld base=0x%08x limit=0x%08x\n", i,
GET_BASE(&tls[i]), GET_LIMIT(&tls[i]));
else
printf("tls: %ld (not present)\n", i);
read_check(fd, debug, sizeof(long)*6);
printf("db: ");
for (i=0; i < 3; i++) printf(" %016lx", debug[i]);
printf("\ndb: ");
for (i=0; i < 3; i++) printf(" %016lx", debug[i]);
printf("\n");
}
#elif defined(__powerpc64__)
{
double fpr[32];
unsigned long fpscr;
typedef struct {
__u32 u[4];
} vector128;
vector128 vr[32];
vector128 vscr;
read_check(fd, fpr, sizeof(fpr));
read_check(fd, &fpscr, sizeof(fpscr));
read_check(fd, vr, sizeof(vr));
read_check(fd, &vscr, sizeof(vscr));
printf("regs: %d-bit Mode Process.\n",
(regs.msr & (1L<<63)) ? 64 : 32);
for (i=0; i < 32; i++) {
if (i%4 == 0) printf("regs:");
printf(" r%02d = %016lx", i, regs.gpr[i]);
if (i%4 == 3) printf("\n");
}
for (i=0; i < 32; i++) {
if (i%4 == 0) printf("regs:");
printf(" fp%02d = %f", i, fpr[i]);
if (i%4 == 3) printf("\n");
}
printf("regs: fpscr = %08lx\n", fpscr);
/* XXX We're presuming altivec is present here */
for (i=0; i < 32; i++) {
if (i%2 == 0) printf("regs:");
printf(" av%02d = %08x%08x%08x%08x", i,
vr[i].u[0], vr[i].u[1], vr[i].u[2], vr[i].u[3]);
if (i%2 == 1) printf("\n");
}
printf("regs: vscr = %08x%08x%08x%08x\n",
vscr.u[0], vscr.u[1], vscr.u[2], vscr.u[3]);
}
#else
printf("regs: no register display for this arch\n");
#endif
/*--- Signal Information ---------------------------------------*/
read_check(fd, &blocked, sizeof(blocked));
printf("sigblk: ");
for (i=0; i < _NSIG; i++) {
if (blocked.sig[i / (sizeof(long)*8)] & (1 << (i % (sizeof(long)*8))))
printf(" %d", i+1);
}
printf("\n");
{ k_sigset_t pending_set;
int flags;
read_check(fd, &flags, sizeof(flags));
while (flags != -1) {
siginfo_t info;
read_check(fd, &info, sizeof(info));
read_check(fd, &flags, sizeof(flags));
}
read_check(fd, &pending_set, sizeof(pending_set));
printf("private sigpend: ");
for (i=0; i < _NSIG; i++) {
if (pending_set.sig[i / (sizeof(long)*8)] & (1 << (i % (sizeof(long)*8))))
printf(" %d", i+1);
}
printf("\n");
read_check(fd, &pending_set, sizeof(pending_set));
printf("shared sigpend: ");
for (i=0; i < _NSIG; i++) {
if (pending_set.sig[i / (sizeof(long)*8)] & (1 << (i % (sizeof(long)*8))))
printf(" %d", i+1);
}
printf("\n");
}
for (i=0; i < _NSIG; i++) {
read_check(fd, &sa, sizeof(sa));
if (sa.ksa_handler == 0) continue;
printf("sigact: %2d", i+1);
if (sa.ksa_handler == (void *)1)
printf(" IGNORED");
else {
printf(" handler=%0*lx", PTRWIDTH,(long)sa.ksa_handler);
#if 0
if (blocked[i / (sizeof(long)*8)] & (1 << (i % (sizeof(long)*8))))
printf(" %d", i+1);
#endif
}
printf("\n");
}
/*--- Misc process information ---------------------------------*/
{
void *clear_child_tid;
unsigned long personality;
read_check(fd, &clear_child_tid, sizeof(clear_child_tid));
read_check(fd, &personality, sizeof(personality));
printf("child_tid: %p\n", clear_child_tid);
printf("personality: %p\n", (void*)personality);
}
/*--- Memory meta-data -----------------------------------------*/
read_check(fd, &mm, sizeof(mm));
printf("code: %0*lx-%0*lx\n", PTRWIDTH, mm.start_code, PTRWIDTH, mm.end_code);
printf("data: %0*lx-%0*lx\n", PTRWIDTH, mm.start_data, PTRWIDTH, mm.end_data);
printf("brk: %0*lx-%0*lx\n", PTRWIDTH, mm.start_brk, PTRWIDTH, mm.brk);
printf("stack: %*s-%0*lx\n", PTRWIDTH, "", PTRWIDTH, mm.start_stack);
printf("arg: %0*lx-%0*lx\n", PTRWIDTH, mm.arg_start, PTRWIDTH, mm.arg_end);
printf("env: %0*lx-%0*lx\n", PTRWIDTH, mm.env_start, PTRWIDTH, mm.env_end);
/*--- Memory data ----------------------------------------------*/
read_check(fd, &map, sizeof(map));
while (map.start != ~0 || map.end != ~0) {
if (map.namelen) {
if (map.namelen > PAGE_SIZE) {
printf("Map has invalid name length: %d\n", (int) map.namelen);
exit(1);
}
read_check(fd, filename, map.namelen);
filename[map.namelen]=0;
printf("map: %0*lx-%0*lx %04x file %s:%0*lx\n",
PTRWIDTH, map.start, PTRWIDTH, map.end, (int)map.flags,
filename, PTRWIDTH, map.offset);
} else {
printf("map: %0*lx-%0*lx %04x (data provided)\n",
PTRWIDTH, map.start, PTRWIDTH, map.end, (int)map.flags);
}
read_check(fd, &page, sizeof(page));
while (page.start != ~0) {
printf("page: %0*lx (data provided)\n", PTRWIDTH, page.start);
lseek(fd, PAGE_SIZE, SEEK_CUR);
read_check(fd, &page, sizeof(page));
}
read_check(fd, &map, sizeof(map));
}
/*--- Read hook data -------------------------------------------*/
read_check(fd, &hook, sizeof(hook));
while (hook.tag[0]) {
printf("hook: tag=\"%s\" bytes=%ld\n", hook.tag, hook.size);
read_skip(fd, hook.size);
read_check(fd, &hook, sizeof(hook));
}
/* Complain about trailing garbage? */
if (read(fd, &i, sizeof(i)) != 0) {
fprintf(stderr, "Trailing garbage at end of file.\n");
exit(1);
}
exit(0);
}
/*
* Local variables:
* c-basic-offset: 4
* End:
*/
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