会python真的可以为所欲为0(回)
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582天前
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鸽子
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891天前/* This example installs a signal handler routine for SIGFPE, |
catches an integer overflow condition, makes an adjustment |
to AX register, and returns. This example program MAY cause |
your computer to crash, and will produce runtime errors |
depending on which memory model is used. |
*/ |
#pragma inline |
#include <stdio.h> |
#include <signal.h> |
void Catcher(int sig, int type, int *reglist) |
{ |
printf("Caught it!\n"); |
*(reglist + 8) = 3; /* make return AX = 3 */ |
} |
int main(void) |
{ |
signal(SIGFPE, Catcher); |
asm mov ax,07FFFH /* AX = 32767 */ |
asm inc ax /* cause overflow */ |
asm into /* activate handler */ |
/* The handler set AX to 3 on return. If that hadn't happened, |
there would have been another exception when the next 'into' |
was executed after the 'dec' instruction. */ |
asm dec ax /* no overflow now */ |
asm into /* doesn't activate */ |
return 0; |
} |
by: 发表于：2017-08-23 16:26:17 顶(0) | 踩(0) 回复
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