c – 如何在不创建新进程的情况下运行汇编代码?
发布时间:2020-12-16 10:22:08 所属栏目:百科 来源:网络整理
导读:该文件包含本机程序集代码,我想在当前进程中运行它. 但我不想创建一个真正的文件(.com或.exe),所以我试过: ...using namespace std;typedef void bitcode();void testcode(){ cout"test";};int main(){ bitcode *c=testcode; // bitcode *c stands for the
该文件包含本机程序集代码,我想在当前进程中运行它.
但我不想创建一个真正的文件(.com或.exe),所以我试过: ... using namespace std; typedef void bitcode(); void testcode(){ cout<<"test"; }; int main() { bitcode *c=&testcode; // bitcode *c stands for the file containing the assembly code. bitcode *d=reinterpret_cast<bitcode*> (malloc(20)); memcpy(d,c,20); d(); // it doesn't work return 0; }; 但是,当我调用d();它时它不起作用.我想知道用C/C++做这个的正确方法是什么. (我在Windows上,如果你能告诉我如何在Linux上制作它,我会非常感激) 非常感谢! PS:我不是要求“在没有创建新流程的情况下在另一个流程中运行可执行文件”. 解决方法
在Windows上,这是我之前写的代码.它至少在我的机器上适用于Win7 VS2010.
基本思想是调用VirtualAlloc以使用PAGE_EXECUTE_READWRITE标志分配内存. #include "stdafx.h" #include "windows.h" int emitcode[] = {0x83ec8b55,0x565340ec,0x0c758b57,0x8b087d8b,0x348d104d,0xcf3c8dce,0x6f0fd9f7,0x6f0fce04,0x0f08ce4c,0x10ce546f,0xce5c6f0f,0x646f0f18,0x6f0f20ce,0x0f28ce6c,0x30ce746f,0xce7c6f0f,0x04e70f38,0x4ce70fcf,0xe70f08cf,0x0f10cf54,0x18cf5ce7,0xcf64e70f,0x6ce70f20,0xe70f28cf,0x0f30cf74,0x38cf7ce7,0x7508c183,0xf8ae0fad,0x5e5f770f,0x5de58b5b,0xccccccc3}; int _tmain(int argc,_TCHAR* argv[]) { int *src = new int[64]; int *dst = new int[64]; int *dst2 = new int[64]; for (int i = 0; i < 64; ++i){ src[i] = i; } //fastercopy(dst,src,64/2); void* address = NULL; address= VirtualAlloc(NULL,sizeof(emitcode),MEM_COMMIT|MEM_RESERVE,PAGE_EXECUTE_READWRITE); memcpy(address,emitcode,sizeof(emitcode)); //call emit code from assemble __asm { push 20h mov eax,dword ptr [src] push eax mov ecx,dword ptr [dst] push ecx mov ecx,dword ptr [address] call ecx add esp,0Ch } for (int i = 0; i < 64; ++i){ printf("%d ",dst[i]); } //call emit code from function pointer typedef void (*FASTCALL)(void* dst,void* src,int len); FASTCALL fastcall; fastcall = (FASTCALL)address; fastcall(dst2,64/2); printf("n"); for (int i = 0; i < 64; ++i){ printf("%d ",dst2[i]); } return 0; } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |