891fa5352e
Callee cleans the stack and first two arguments are passed in registers ecx and edx. You could emulate this by choosing stdcall and setting the custom_registers on the arguments manually, but this is easier.
59 lines
2.3 KiB
C++
59 lines
2.3 KiB
C++
/**
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* =============================================================================
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* DynamicHooks
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* Copyright (C) 2015 Robin Gohmert. All rights reserved.
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* =============================================================================
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*
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* This software is provided 'as-is', without any express or implied warranty.
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* In no event will the authors be held liable for any damages arising from
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* the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software in a
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* product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source distribution.
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*
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* asm.h/cpp from devmaster.net (thanks cybermind) edited by pRED* to handle gcc
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* -fPIC thunks correctly
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*
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* Idea and trampoline code taken from DynDetours (thanks your-name-here).
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*/
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// ============================================================================
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// >> INCLUDES
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// ============================================================================
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#include "x86MsFastcall.h"
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// ============================================================================
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// >> x86MsFastcall
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// ============================================================================
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x86MsFastcall::x86MsFastcall(ke::Vector<DataTypeSized_t> &vecArgTypes, DataTypeSized_t returnType, int iAlignment) :
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x86MsStdcall(vecArgTypes, returnType, iAlignment)
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{
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// First argument is passed in ecx.
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if (m_vecArgTypes.length() > 0) {
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DataTypeSized_t &type = m_vecArgTypes[0];
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// Don't force the register on the user.
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// Why choose Fastcall if you set your own argument registers though..
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if (type.custom_register == None)
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type.custom_register = ECX;
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}
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// Second argument is passed in edx.
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if (m_vecArgTypes.length() > 1) {
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DataTypeSized_t &type = m_vecArgTypes[1];
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if (type.custom_register == None)
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type.custom_register = EDX;
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}
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}
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