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https://github.com/Chuyu-Team/VC-LTL5.git
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mingkuang
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
/***
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*getproc.c - Get the address of a procedure in a DLL.
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* defines _getdllprocadd() - gets a procedure address by name or
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* ordinal
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*
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*******************************************************************************/
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#include <corecrt_internal.h>
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#define _CRT_ENABLE_OBSOLETE_LOADLIBRARY_FUNCTIONS
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#include <process.h>
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/***
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*int (*)() _getdllprocaddr(handle, name, ordinal) - Get the address of a
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* DLL procedure specified by name or ordinal
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*
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*Purpose:
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*
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*Entry:
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* int handle - a DLL handle from _loaddll
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* char * name - Name of the procedure, or nullptr to get by ordinal
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* int ordinal - Ordinal of the procedure, or -1 to get by name
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*
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*
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*Exit:
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* returns a pointer to the procedure if found
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* returns nullptr if not found
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*
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*Exceptions:
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*
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*******************************************************************************/
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typedef int (__cdecl* proc_address_type)();
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#if WindowsTargetPlatformMinVersion < WindowsTargetPlatformWindows10_10240 && (defined _M_AMD64 || defined _M_ARM)
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extern "C"
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DECLSPEC_GUARD_SUPPRESS
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proc_address_type __cdecl _getdllprocaddr(
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intptr_t const module_handle_value,
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char* const procedure_name,
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intptr_t const ordinal
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)
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{
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HMODULE const module_handle = reinterpret_cast<HMODULE>(module_handle_value);
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if (procedure_name == nullptr)
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{
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if (ordinal <= 65535)
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{
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char* const ordinal_as_string = reinterpret_cast<char*>(ordinal);
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return reinterpret_cast<proc_address_type>(
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GetProcAddress(module_handle, ordinal_as_string));
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}
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}
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else
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{
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if (ordinal == static_cast<intptr_t>(-1))
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{
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return reinterpret_cast<proc_address_type>(
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GetProcAddress(module_handle, procedure_name));
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}
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}
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return nullptr;
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}
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_LCRT_DEFINE_IAT_SYMBOL(_getdllprocaddr);
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#endif |