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Flash for Linux

http://f4l.sourceforge.net/


顺便COPY段代码先扔这里:

--- d:\vsprojects\vcpros\consolepros\vckbase1\first.cpp  -------------------
1:    #include <stdio.h>
2:
3:    int main(int argc, char** argv, char** envp)
4:    {
00401010   push        ebp  ;save ebp(cpu->内存)
00401011   mov         ebp,esp  ;set stack frame pointer
00401013   sub         esp,40h  ;allocate space for locals
00401016   push        ebx  ;save registers-------下面内容均如此
00401017   push        esi
00401018   push        edi
00401019   lea         edi,[ebp-40h]
0040101C   mov         ecx,10h
00401021   mov         eax,0CCCCCCCCh
00401026   rep stos    dword ptr [edi]
5:        return 0;
00401028   xor         eax,eax
6:    }
0040102A   pop         edi
0040102B   pop         esi
0040102C   pop         ebx  ;restore registers
0040102D   mov         esp,ebp  ;restore stack pointer
0040102F   pop         ebp  ;restore ebp
00401030   ret    ;return from function
--- No source file  --------------------------------------------------------


argc = 1 ;因为在VC中要读取你的*argv指向的应用程序名字(*.exe)
* argv = D:\VSPROJECTS\VCPROS\CONSOLEPROS\vckbase1\Debug\vckbase1.exe
* envp = ALLUSERSPROFILE=C:\Documents and Settings\All Users

 =============================================================

Considerations when Writing Prolog/Epilog Code

Microsoft Specific —>

Before writing your own prolog and epilog code sequences, it is important to understand how the stack frame is laid out. It is also useful to know how to use the __LOCAL_SIZE predefined constant.

C Stack Frame Layout

This example shows the standard prolog code that might appear in a 32-bit function:

push     ebp                 ; Save ebp
mov      ebp, esp            ; Set stack frame pointer
sub      esp, localbytes     ; Allocate space for locals
push     <registers>         ; Save registers

The localbytes variable represents the number of bytes needed on the stack for local variables, and the registers variable is a placeholder that represents the list of registers to be saved on the stack. After pushing the registers, you can place any other appropriate data on the stack. The following is the corresponding epilog code:

pop      <registers>         ; Restore registers
mov      esp, ebp            ; Restore stack pointer
pop      ebp                 ; Restore ebp
ret                          ; Return from function

The stack always grows down (from high to low memory addresses). The base pointer (ebp) points to the pushed value of ebp. The local variables area begins at ebp-2. To access local variables, calculate an offset from ebp by subtracting the appropriate value from ebp.

The __LOCAL_SIZE Constant

The compiler provides a constant, __LOCAL_SIZE, for use in the inline assembler block of function prolog code. This constant is used to allocate space for local variables on the stack frame in custom prolog code.

The compiler determines the value of __LOCAL_SIZE. The value is the total number of bytes of all user-defined local variables and compiler-generated temporary variables. __LOCAL_SIZE can be used only as an immediate operand; it cannot be used in an expression. You must not change or redefine the value of this constant. For example:

mov      eax, __LOCAL_SIZE           ;Immediate operand--Okay
mov      eax, [ebp - __LOCAL_SIZE]   ;Error

The following example of a naked function containing custom prolog and epilog sequences uses __LOCAL_SIZE in the prolog sequence:

__declspec ( naked ) func()
{
int i;
int j;
__asm      /* prolog */
{
push   ebp
mov      ebp, esp
sub      esp, __LOCAL_SIZE
}
/* Function body */
__asm      /* epilog */
{
mov      esp, ebp
pop      ebp
ret
}
}  

END Microsoft Specific

 

 

 


 

posted @ 2006-09-24 17:31 -> 阅读(...) 评论(...) 编辑 收藏