// 该子程序用来打印出错中断的名称、出错号、调用程序的EIP、EFLAGS、ESP、fs寄存器值、
// 段的基址、段的长度、进程号pid、任务号、10字节指令码。如果堆栈在用户数据段，则还
// 打印16字节的堆栈内容。
static void die(char * str,long esp_ptr,long nr)
{
long * esp = (long *) esp_ptr;
int i;
printk("%s: %04x\n\r",str,nr&0xffff);
// 下行打印语句显示当前调用进程的CS:EIP、EFLAGS和SS:ESP的值。参照图8-4，这里esp[0]即为
// 图中的esp0位置。因此我们把这句拆分开来看为：
// 1）EIP:\t%04x:%p\n -- esp[1]是段选择符(cs)，esp[0]是eip
// 2）EFLAGS:\t%p -- esp[2]是EFLAGS
// 3）ESP:\t%04x:%p\n -- esp[4]是原ss,esp[3]是原esp
printk("EIP:\t%04x:%p\nEFLAGS:\t%p\nESP:\t%04x:%p\n",
esp[1],esp[0],esp[2],esp[4],esp[3]);
printk("fs: %04x\n",_fs());
printk("base: %p, limit: %p\n",get_base(current->ldt[1]),get_limit(0x17));
if (esp[4] == 0x17) {
printk("Stack: ");
for (i=0;i<4;i++)
printk("%p ",get_seg_long(0x17,i+(long *)esp[3]));
printk("\n");
}
str(i); // 取当前运行任务的任务号(include/linux/sched.h 159)
printk("Pid: %d, process nr: %d\n\r",current->pid,0xffff & i);
for(i=0;i<10;i++)
printk("%02x ",0xff & get_seg_byte(esp[1],(i+(char *)esp[0])));
printk("\n\r");
do_exit(11); /* play segment exception */
}
static void die(char * str,long esp_ptr,long nr)
{
long * esp = (long *) esp_ptr;
int i;
printk("%s: %04x\n\r",str,nr&0xffff);
printk("EIP:\t%04x:%p\nEFLAGS:\t%p\nESP:\t%04x:%p\n",
esp[1],esp[0],esp[2],esp[4],esp[3]);
printk("fs: %04x\n",_fs());
printk("code base: %p, limit: %p\n",get_base(current->ldt[1]),get_limit(0x17));
printk("data base: %p, limit: %p\n",get_base(current->ldt[2]),get_limit(0x17));
long line = get_base(current->ldt[1])+esp[0];
long ph0 = (*(long *)(current->tss.cr3 + ((line>>20) & 0xffc )));
long ph1 = *(long*)(((line>>10) & 0xffc)+(*(long *)(current->tss.cr3 + ((line>>20) & 0xffc ))));
printk("line: %p, ph: %p %p\n",line,ph0,ph1);
if (esp[4] == 0x17) {
printk("Stack: ");
for (i=0;i<4;i++)
printk("%p ",get_seg_long(0x17,i+(long *)esp[3]));
printk("\n");
}
str(i);
printk("Pid: %d, process nr: %d\n\r",current->pid,0xffff & i);
for(i=0;i<10;i++)
printk("%02x ",0xff & get_seg_byte(esp[1],(i+(char *)esp[0])));
printk("\n\r");
do_exit(11); /* play segment exception */
}
// 该子程序用来打印出错中断的名称、出错号、调用程序的EIP、EFLAGS、ESP、fs段寄存器值、
// 段的基址、段的长度、进程号PID、任务号、10字节指令码。如果堆栈在用户数据段，则还
// 打印16字节的堆栈内容。
static void die(char * str,long esp_ptr,long nr)
{
long * esp = (long *) esp_ptr;
int i;
printk("%s: %04x\n\r",str,nr&0xffff);
// 下行打印语句显示当前调用进程的CS：EIP、EFLAGS和SS:ESP的值。
// EIP:\t%04x:%p\n - esp[1]是段选择符(cs)，esp[0]是eip.
// EFLAGS:\t%p\n - esp[2]是eflags
// ESP:\t%04x:%p\n - esp[4]是源ss，esp[3]是源esp
printk("EIP:\t%04x:%p\nEFLAGS:\t%p\nESP:\t%04x:%p\n",
esp[1],esp[0],esp[2],esp[4],esp[3]);
printk("fs: %04x\n",_fs());
printk("base: %p, limit: %p\n",get_base(current->ldt[1]),get_limit(0x17));
if (esp[4] == 0x17) {
printk("Stack: ");
for (i=0;i<4;i++)
printk("%p ",get_seg_long(0x17,i+(long *)esp[3]));
printk("\n");
}
str(i); // 取当前运行任务的任务号
printk("Pid: %d, process nr: %d\n\r",current->pid,0xffff & i);
for(i=0;i<10;i++)
printk("%02x ",0xff & get_seg_byte(esp[1],(i+(char *)esp[0])));
printk("\n\r");
do_exit(11); /* play segment exception */
}
int main(void)
{
unsigned int a = 0x400440;
printf("%x\n", &a);
//unsigned int *res = get_seg_byte(0x400440, &a);
//printf("%x\n", *res);
unsigned int res3 = get_seg_byte(2, &a);
printf("%x\n", res3);
printf("%x\n", a);
//printf("%x\n", *(unsigned int *)(res3));
unsigned int res2 = get_seg_mov(2, &a);
printf("res2 %x\n", res2);
return 0;
}
static void die(char * str,long esp_ptr,long nr)
{
long * esp = (long *) esp_ptr;
int i;
printk("%s: %04x\n\r",str,nr&0xffff);
printk("EIP:\t%04x:%p\nEFLAGS:\t%p\nESP:\t%04x:%p\n",
esp[1],esp[0],esp[2],esp[4],esp[3]);
printk("fs: %04x\n",_fs());
printk("base: %p, limit: %p\n",get_base(current->ldt[1]),get_limit(0x17));
if (esp[4] == 0x17) {
printk("Stack: ");
for (i=0;i<4;i++)
printk("%p ",get_seg_long(0x17,i+(long *)esp[3]));
printk("\n");
}
str(i);
printk("Pid: %d, process nr: %d\n\r",current->pid,0xffff & i);
for(i=0;i<10;i++)
printk("%02x ",0xff & get_seg_byte(esp[1],(i+(char *)esp[0])));
printk("\n\r");
do_exit(11); /* play segment exception */
}