mirror of
https://github.com/CrazyRedMachine/popnhax.git
synced 2024-11-24 06:10:12 +01:00
317 lines
10 KiB
C
317 lines
10 KiB
C
/*
|
|
* MinHook - The Minimalistic API Hooking Library for x64/x86
|
|
* Copyright (C) 2009-2017 Tsuda Kageyu.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
|
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
|
|
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <windows.h>
|
|
|
|
#ifndef ARRAYSIZE
|
|
#define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0]))
|
|
#endif
|
|
|
|
#if defined(_M_X64) || defined(__x86_64__)
|
|
#include "hde64.h"
|
|
typedef hde64s HDE;
|
|
#define HDE_DISASM(code, hs) hde64_disasm(code, hs)
|
|
#else
|
|
#include "hde32.h"
|
|
typedef hde32s HDE;
|
|
#define HDE_DISASM(code, hs) hde32_disasm(code, hs)
|
|
#endif
|
|
|
|
#include "trampoline.h"
|
|
#include "buffer.h"
|
|
|
|
// Maximum size of a trampoline function.
|
|
#if defined(_M_X64) || defined(__x86_64__)
|
|
#define TRAMPOLINE_MAX_SIZE (MEMORY_SLOT_SIZE - sizeof(JMP_ABS))
|
|
#else
|
|
#define TRAMPOLINE_MAX_SIZE MEMORY_SLOT_SIZE
|
|
#endif
|
|
|
|
//-------------------------------------------------------------------------
|
|
static BOOL IsCodePadding(LPBYTE pInst, UINT size)
|
|
{
|
|
UINT i;
|
|
|
|
if (pInst[0] != 0x00 && pInst[0] != 0x90 && pInst[0] != 0xCC)
|
|
return FALSE;
|
|
|
|
for (i = 1; i < size; ++i)
|
|
{
|
|
if (pInst[i] != pInst[0])
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
//-------------------------------------------------------------------------
|
|
BOOL CreateTrampolineFunction(PTRAMPOLINE ct)
|
|
{
|
|
#if defined(_M_X64) || defined(__x86_64__)
|
|
CALL_ABS call = {
|
|
0xFF, 0x15, 0x00000002, // FF15 00000002: CALL [RIP+8]
|
|
0xEB, 0x08, // EB 08: JMP +10
|
|
0x0000000000000000ULL // Absolute destination address
|
|
};
|
|
JMP_ABS jmp = {
|
|
0xFF, 0x25, 0x00000000, // FF25 00000000: JMP [RIP+6]
|
|
0x0000000000000000ULL // Absolute destination address
|
|
};
|
|
JCC_ABS jcc = {
|
|
0x70, 0x0E, // 7* 0E: J** +16
|
|
0xFF, 0x25, 0x00000000, // FF25 00000000: JMP [RIP+6]
|
|
0x0000000000000000ULL // Absolute destination address
|
|
};
|
|
#else
|
|
CALL_REL call = {
|
|
0xE8, // E8 xxxxxxxx: CALL +5+xxxxxxxx
|
|
0x00000000 // Relative destination address
|
|
};
|
|
JMP_REL jmp = {
|
|
0xE9, // E9 xxxxxxxx: JMP +5+xxxxxxxx
|
|
0x00000000 // Relative destination address
|
|
};
|
|
JCC_REL jcc = {
|
|
0x0F, 0x80, // 0F8* xxxxxxxx: J** +6+xxxxxxxx
|
|
0x00000000 // Relative destination address
|
|
};
|
|
#endif
|
|
|
|
UINT8 oldPos = 0;
|
|
UINT8 newPos = 0;
|
|
ULONG_PTR jmpDest = 0; // Destination address of an internal jump.
|
|
BOOL finished = FALSE; // Is the function completed?
|
|
#if defined(_M_X64) || defined(__x86_64__)
|
|
UINT8 instBuf[16];
|
|
#endif
|
|
|
|
ct->patchAbove = FALSE;
|
|
ct->nIP = 0;
|
|
|
|
do
|
|
{
|
|
HDE hs;
|
|
UINT copySize;
|
|
LPVOID pCopySrc;
|
|
ULONG_PTR pOldInst = (ULONG_PTR)ct->pTarget + oldPos;
|
|
ULONG_PTR pNewInst = (ULONG_PTR)ct->pTrampoline + newPos;
|
|
|
|
copySize = HDE_DISASM((LPVOID)pOldInst, &hs);
|
|
if (hs.flags & F_ERROR)
|
|
return FALSE;
|
|
|
|
pCopySrc = (LPVOID)pOldInst;
|
|
if (oldPos >= sizeof(JMP_REL))
|
|
{
|
|
// The trampoline function is long enough.
|
|
// Complete the function with the jump to the target function.
|
|
#if defined(_M_X64) || defined(__x86_64__)
|
|
jmp.address = pOldInst;
|
|
#else
|
|
jmp.operand = (UINT32)(pOldInst - (pNewInst + sizeof(jmp)));
|
|
#endif
|
|
pCopySrc = &jmp;
|
|
copySize = sizeof(jmp);
|
|
|
|
finished = TRUE;
|
|
}
|
|
#if defined(_M_X64) || defined(__x86_64__)
|
|
else if ((hs.modrm & 0xC7) == 0x05)
|
|
{
|
|
// Instructions using RIP relative addressing. (ModR/M = 00???101B)
|
|
|
|
// Modify the RIP relative address.
|
|
PUINT32 pRelAddr;
|
|
|
|
// Avoid using memcpy to reduce the footprint.
|
|
#ifndef _MSC_VER
|
|
memcpy(instBuf, (LPBYTE)pOldInst, copySize);
|
|
#else
|
|
__movsb(instBuf, (LPBYTE)pOldInst, copySize);
|
|
#endif
|
|
pCopySrc = instBuf;
|
|
|
|
// Relative address is stored at (instruction length - immediate value length - 4).
|
|
pRelAddr = (PUINT32)(instBuf + hs.len - ((hs.flags & 0x3C) >> 2) - 4);
|
|
*pRelAddr
|
|
= (UINT32)((pOldInst + hs.len + (INT32)hs.disp.disp32) - (pNewInst + hs.len));
|
|
|
|
// Complete the function if JMP (FF /4).
|
|
if (hs.opcode == 0xFF && hs.modrm_reg == 4)
|
|
finished = TRUE;
|
|
}
|
|
#endif
|
|
else if (hs.opcode == 0xE8)
|
|
{
|
|
// Direct relative CALL
|
|
ULONG_PTR dest = pOldInst + hs.len + (INT32)hs.imm.imm32;
|
|
#if defined(_M_X64) || defined(__x86_64__)
|
|
call.address = dest;
|
|
#else
|
|
call.operand = (UINT32)(dest - (pNewInst + sizeof(call)));
|
|
#endif
|
|
pCopySrc = &call;
|
|
copySize = sizeof(call);
|
|
}
|
|
else if ((hs.opcode & 0xFD) == 0xE9)
|
|
{
|
|
// Direct relative JMP (EB or E9)
|
|
ULONG_PTR dest = pOldInst + hs.len;
|
|
|
|
if (hs.opcode == 0xEB) // isShort jmp
|
|
dest += (INT8)hs.imm.imm8;
|
|
else
|
|
dest += (INT32)hs.imm.imm32;
|
|
|
|
// Simply copy an internal jump.
|
|
if ((ULONG_PTR)ct->pTarget <= dest
|
|
&& dest < ((ULONG_PTR)ct->pTarget + sizeof(JMP_REL)))
|
|
{
|
|
if (jmpDest < dest)
|
|
jmpDest = dest;
|
|
}
|
|
else
|
|
{
|
|
#if defined(_M_X64) || defined(__x86_64__)
|
|
jmp.address = dest;
|
|
#else
|
|
jmp.operand = (UINT32)(dest - (pNewInst + sizeof(jmp)));
|
|
#endif
|
|
pCopySrc = &jmp;
|
|
copySize = sizeof(jmp);
|
|
|
|
// Exit the function If it is not in the branch
|
|
finished = (pOldInst >= jmpDest);
|
|
}
|
|
}
|
|
else if ((hs.opcode & 0xF0) == 0x70
|
|
|| (hs.opcode & 0xFC) == 0xE0
|
|
|| (hs.opcode2 & 0xF0) == 0x80)
|
|
{
|
|
// Direct relative Jcc
|
|
ULONG_PTR dest = pOldInst + hs.len;
|
|
|
|
if ((hs.opcode & 0xF0) == 0x70 // Jcc
|
|
|| (hs.opcode & 0xFC) == 0xE0) // LOOPNZ/LOOPZ/LOOP/JECXZ
|
|
dest += (INT8)hs.imm.imm8;
|
|
else
|
|
dest += (INT32)hs.imm.imm32;
|
|
|
|
// Simply copy an internal jump.
|
|
if ((ULONG_PTR)ct->pTarget <= dest
|
|
&& dest < ((ULONG_PTR)ct->pTarget + sizeof(JMP_REL)))
|
|
{
|
|
if (jmpDest < dest)
|
|
jmpDest = dest;
|
|
}
|
|
else if ((hs.opcode & 0xFC) == 0xE0)
|
|
{
|
|
// LOOPNZ/LOOPZ/LOOP/JCXZ/JECXZ to the outside are not supported.
|
|
return FALSE;
|
|
}
|
|
else
|
|
{
|
|
UINT8 cond = ((hs.opcode != 0x0F ? hs.opcode : hs.opcode2) & 0x0F);
|
|
#if defined(_M_X64) || defined(__x86_64__)
|
|
// Invert the condition in x64 mode to simplify the conditional jump logic.
|
|
jcc.opcode = 0x71 ^ cond;
|
|
jcc.address = dest;
|
|
#else
|
|
jcc.opcode1 = 0x80 | cond;
|
|
jcc.operand = (UINT32)(dest - (pNewInst + sizeof(jcc)));
|
|
#endif
|
|
pCopySrc = &jcc;
|
|
copySize = sizeof(jcc);
|
|
}
|
|
}
|
|
else if ((hs.opcode & 0xFE) == 0xC2)
|
|
{
|
|
// RET (C2 or C3)
|
|
|
|
// Complete the function if not in a branch.
|
|
finished = (pOldInst >= jmpDest);
|
|
}
|
|
|
|
// Can't alter the instruction length in a branch.
|
|
if (pOldInst < jmpDest && copySize != hs.len)
|
|
return FALSE;
|
|
|
|
// Trampoline function is too large.
|
|
if ((newPos + copySize) > TRAMPOLINE_MAX_SIZE)
|
|
return FALSE;
|
|
|
|
// Trampoline function has too many instructions.
|
|
if (ct->nIP >= ARRAYSIZE(ct->oldIPs))
|
|
return FALSE;
|
|
|
|
ct->oldIPs[ct->nIP] = oldPos;
|
|
ct->newIPs[ct->nIP] = newPos;
|
|
ct->nIP++;
|
|
|
|
// Avoid using memcpy to reduce the footprint.
|
|
#ifndef _MSC_VER
|
|
memcpy((LPBYTE)ct->pTrampoline + newPos, pCopySrc, copySize);
|
|
#else
|
|
__movsb((LPBYTE)ct->pTrampoline + newPos, pCopySrc, copySize);
|
|
#endif
|
|
newPos += copySize;
|
|
oldPos += hs.len;
|
|
}
|
|
while (!finished);
|
|
|
|
// Is there enough place for a long jump?
|
|
if (oldPos < sizeof(JMP_REL)
|
|
&& !IsCodePadding((LPBYTE)ct->pTarget + oldPos, sizeof(JMP_REL) - oldPos))
|
|
{
|
|
// Is there enough place for a short jump?
|
|
if (oldPos < sizeof(JMP_REL_SHORT)
|
|
&& !IsCodePadding((LPBYTE)ct->pTarget + oldPos, sizeof(JMP_REL_SHORT) - oldPos))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
// Can we place the long jump above the function?
|
|
if (!IsExecutableAddress((LPBYTE)ct->pTarget - sizeof(JMP_REL)))
|
|
return FALSE;
|
|
|
|
if (!IsCodePadding((LPBYTE)ct->pTarget - sizeof(JMP_REL), sizeof(JMP_REL)))
|
|
return FALSE;
|
|
|
|
ct->patchAbove = TRUE;
|
|
}
|
|
|
|
#if defined(_M_X64) || defined(__x86_64__)
|
|
// Create a relay function.
|
|
jmp.address = (ULONG_PTR)ct->pDetour;
|
|
|
|
ct->pRelay = (LPBYTE)ct->pTrampoline + newPos;
|
|
memcpy(ct->pRelay, &jmp, sizeof(jmp));
|
|
#endif
|
|
|
|
return TRUE;
|
|
}
|