Windows NT 4.0 source code leak
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/*++
Copyright (c) 1995 Microsoft Corporation
Module Name:
machine.cpp
Abstract:
This file implements the CreateMachApiThunk() function. This
function is responsible for emitting the individual API thunks
for the mips architecture.
Author:
Wesley Witt (wesw) 28-June-1995
Environment:
User Mode
--*/
#include "apidllp.h"
#pragma hdrstop
PUCHAR
CreateMachApiThunk(
PULONG IatAddress,
PUCHAR Text,
PDLL_INFO DllInfo,
PAPI_INFO ApiInfo
)
/*++
Routine Description:
Emits the machine specific code for the API thunks.
Arguments:
IatAddress - Pointer to the IAT fir this API
Text - Pointer to a buffer to place the generated code
DllInfo - Pointer to the DLL_INFO structure
ApiInfo - Pointer to the API_INFO structure
Return Value:
Pointer to the next byte to place more generated code.
--*/
{
if (ApiInfo->ThunkAddress) {
*IatAddress = ApiInfo->ThunkAddress;
return Text;
}
*IatAddress = (ULONG)Text;
ApiInfo->ThunkAddress = *IatAddress;
PULONG Code = (PULONG)Text;
Code[0] = 0x3c080000 | HIGH_ADDRX(DllInfo); // lui t0,0
Code[1] = 0x35080000 | LOW_ADDR(DllInfo); // oriu t0,t0,0
Code[2] = 0x3c090000 | HIGH_ADDRX(ApiInfo); // lui t1,0
Code[3] = 0x35290000 | LOW_ADDR(ApiInfo); // oriu t1,t1,0
//
if (_stricmp(DllInfo->Name,KERNEL32)!=0) { //
Code[4] = 0x340a0000; // oriu t2,zero,0
} else //
if (strcmp((LPSTR)(ApiInfo->Name+(LPSTR)MemPtr),LOADLIBRARYA)==0) { //
Code[4] = 0x340a0001; // oriu t2,zero,1
} else //
if (strcmp((LPSTR)(ApiInfo->Name+(LPSTR)MemPtr),LOADLIBRARYW)==0) { //
Code[4] = 0x340a0002; // oriu t2,zero,2
} else //
if (strcmp((LPSTR)(ApiInfo->Name+(LPSTR)MemPtr),FREELIBRARY)==0) { //
Code[4] = 0x340a0003; // oriu t2,zero,3
} else { //
Code[4] = 0x340a0000; // oriu t2,zero,0
} //
//
Code[5] = 0x3c0b0000 | HIGH_ADDRX(ApiMonThunk); // lui t3,0
Code[6] = 0x356b0000 | LOW_ADDR(ApiMonThunk); // oriu t3,t3,0
Code[7] = 0x01600008; // jr t3
Code[8] = 0x00000000; // nop
return (PUCHAR)&Code[9];
}