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Mark machine code array as executable #4

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Dec 22, 2022
Merged

Mark machine code array as executable #4

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24 changes: 9 additions & 15 deletions proc_map.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,7 @@

#include "proc_map.h"
#include <ddraw.h>
#include <memoryapi.h>

//-----for slider--------
//#include <math.h>
Expand All @@ -49,19 +50,6 @@ extern bool bMMX;



/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * *
VERY, VERY IMPORTANT:
You must build this with Visual Studio 6.0.
Visual Studio 2003 doesn't seem to let you read code segments ! ! !
* * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * *

*/

//------------------------------------------------------------------
static void *realAddress(void *fn)
{
Expand Down Expand Up @@ -609,7 +597,8 @@ void Process_Map_Asm(void *p1, void *p2)//, LPDIRECTDRAWSURFACE lpDDSurf)
// and hard-code our custom variables into the instructions (...our
// solution for not having enough registers), then execute the code.

unsigned char code[8192];
const SIZE_T code_size_bytes = 8192;
unsigned char * const code = (unsigned char *)VirtualAlloc(NULL, code_size_bytes, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
int codepos=0;

int start_codepos[16];
Expand Down Expand Up @@ -658,6 +647,8 @@ void Process_Map_Asm(void *p1, void *p2)//, LPDIRECTDRAWSURFACE lpDDSurf)
popa // release builds will break without this!
emms
};

VirtualFree(code, code_size_bytes, MEM_DECOMMIT);
}
else //32-bit case
{
Expand All @@ -667,7 +658,8 @@ void Process_Map_Asm(void *p1, void *p2)//, LPDIRECTDRAWSURFACE lpDDSurf)
// and hard-code our custom variables into the instructions (...our
// solution for not having enough registers), then execute the code.

unsigned char code[8192];
const SIZE_T code_size_bytes = 8192;
unsigned char * const code = (unsigned char *)VirtualAlloc(NULL, code_size_bytes, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
int codepos=0;

int start_codepos[16];
Expand Down Expand Up @@ -716,6 +708,8 @@ void Process_Map_Asm(void *p1, void *p2)//, LPDIRECTDRAWSURFACE lpDDSurf)
popa // release builds will break without this!
emms
};

VirtualFree(code, code_size_bytes, MEM_DECOMMIT);
}
else // MMX version
{
Expand Down