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#include <errno.h>
#include <string.h>
#include <sys/utsname.h>
#include <stdlib.h>
#include <limits.h>
#include <stdio.h>
#include "crashdump-x86_64.h"
#define KERNEL_VERSION(major, minor, patch) \
(((major) << 16) | ((minor) << 8) | patch)
long kernel_version(void)
{
struct utsname utsname;
unsigned long major, minor, patch;
char *p;
if (uname(&utsname) < 0) {
fprintf(stderr, "uname failed: %s\n", strerror(errno));
return -1;
}
p = utsname.release;
major = strtoul(p, &p, 10);
if (major == ULONG_MAX) {
fprintf(stderr, "strtoul failed: %s\n", strerror(errno));
return -1;
}
if (*p++ != '.') {
fprintf(stderr, "Unsupported utsname.release: %s\n",
utsname.release);
return -1;
}
minor = strtoul(p, &p, 10);
if (major == ULONG_MAX) {
fprintf(stderr, "strtoul failed: %s\n", strerror(errno));
return -1;
}
if (*p++ != '.') {
fprintf(stderr, "Unsupported utsname.release: %s\n",
utsname.release);
return -1;
}
patch = strtoul(p, &p, 10);
if (major == ULONG_MAX) {
fprintf(stderr, "strtoul failed: %s\n", strerror(errno));
return -1;
}
if (major >= 256 || minor >= 256 || patch >= 256) {
fprintf(stderr, "Unsupported utsname.release: %s\n",
utsname.release);
return -1;
}
return KERNEL_VERSION(major, minor, patch);
}
#define PAGE_OFFSET_PRE_2_6_27 0xffff810000000000UL
#define PAGE_OFFSET 0xffff880000000000UL
unsigned long page_offset;
int arch_init(void)
{
int kv;
kv = kernel_version();
if (kv < 0)
return -1;
if (kv < KERNEL_VERSION(2, 6, 27))
page_offset = PAGE_OFFSET_PRE_2_6_27;
else
page_offset = PAGE_OFFSET;
return 0;
}
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