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Add dlfcn library for win32
This commit is contained in:
Miodrag Milanovic
parent
518194fac1
commit
05218ec900
2 changed files with 914 additions and 0 deletions
820
libs/dlfcn-win32/dlfcn.cc
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820
libs/dlfcn-win32/dlfcn.cc
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/*
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* dlfcn-win32
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* Copyright (c) 2007 Ramiro Polla
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* Copyright (c) 2015 Tiancheng "Timothy" Gu
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* Copyright (c) 2019 Pali Rohár <pali.rohar@gmail.com>
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* Copyright (c) 2020 Ralf Habacker <ralf.habacker@freenet.de>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifdef _DEBUG
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#define _CRTDBG_MAP_ALLOC
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#include <stdlib.h>
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#include <crtdbg.h>
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#endif
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#include <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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/* Older versions do not have this type */
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#if _WIN32_WINNT < 0x0500
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typedef ULONG ULONG_PTR;
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#endif
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/* Older SDK versions do not have these macros */
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#ifndef GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
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#define GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS 0x4
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#endif
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#ifndef GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT
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#define GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT 0x2
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#endif
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#ifdef _MSC_VER
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/* https://docs.microsoft.com/en-us/cpp/intrinsics/returnaddress */
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#pragma intrinsic( _ReturnAddress )
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#else
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/* https://gcc.gnu.org/onlinedocs/gcc/Return-Address.html */
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#ifndef _ReturnAddress
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#define _ReturnAddress( ) ( __builtin_extract_return_addr( __builtin_return_address( 0 ) ) )
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#endif
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#endif
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#ifdef DLFCN_WIN32_SHARED
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#define DLFCN_WIN32_EXPORTS
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#endif
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#include "dlfcn.h"
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#if defined( _MSC_VER ) && _MSC_VER >= 1300
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/* https://docs.microsoft.com/en-us/cpp/cpp/noinline */
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#define DLFCN_NOINLINE __declspec( noinline )
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#elif defined( __GNUC__ ) && ( ( __GNUC__ > 3 ) || ( __GNUC__ == 3 && __GNUC_MINOR__ >= 1 ) )
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/* https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html */
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#define DLFCN_NOINLINE __attribute__(( noinline ))
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#else
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#define DLFCN_NOINLINE
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#endif
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/* Note:
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* MSDN says these functions are not thread-safe. We make no efforts to have
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* any kind of thread safety.
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*/
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typedef struct local_object {
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HMODULE hModule;
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struct local_object *previous;
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struct local_object *next;
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} local_object;
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static local_object first_object;
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/* These functions implement a double linked list for the local objects. */
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static local_object *local_search( HMODULE hModule )
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{
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local_object *pobject;
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if( hModule == NULL )
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return NULL;
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for( pobject = &first_object; pobject; pobject = pobject->next )
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if( pobject->hModule == hModule )
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return pobject;
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return NULL;
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}
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static BOOL local_add( HMODULE hModule )
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{
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local_object *pobject;
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local_object *nobject;
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if( hModule == NULL )
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return TRUE;
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pobject = local_search( hModule );
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/* Do not add object again if it's already on the list */
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if( pobject != NULL )
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return TRUE;
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for( pobject = &first_object; pobject->next; pobject = pobject->next );
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nobject = (local_object *) malloc( sizeof( local_object ) );
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if( !nobject )
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return FALSE;
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pobject->next = nobject;
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nobject->next = NULL;
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nobject->previous = pobject;
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nobject->hModule = hModule;
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return TRUE;
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}
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static void local_rem( HMODULE hModule )
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{
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local_object *pobject;
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if( hModule == NULL )
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return;
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pobject = local_search( hModule );
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if( pobject == NULL )
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return;
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if( pobject->next )
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pobject->next->previous = pobject->previous;
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if( pobject->previous )
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pobject->previous->next = pobject->next;
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free( pobject );
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}
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/* POSIX says dlerror( ) doesn't have to be thread-safe, so we use one
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* static buffer.
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* MSDN says the buffer cannot be larger than 64K bytes, so we set it to
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* the limit.
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*/
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static char error_buffer[65535];
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static BOOL error_occurred;
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static void save_err_str( const char *str, DWORD dwMessageId )
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{
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DWORD ret;
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size_t pos, len;
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len = strlen( str );
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if( len > sizeof( error_buffer ) - 5 )
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len = sizeof( error_buffer ) - 5;
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/* Format error message to:
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* "<argument to function that failed>": <Windows localized error message>
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*/
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pos = 0;
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error_buffer[pos++] = '"';
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memcpy( error_buffer + pos, str, len );
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pos += len;
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error_buffer[pos++] = '"';
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error_buffer[pos++] = ':';
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error_buffer[pos++] = ' ';
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ret = FormatMessageA( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dwMessageId,
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MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ),
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error_buffer + pos, (DWORD) ( sizeof( error_buffer ) - pos ), NULL );
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pos += ret;
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/* When FormatMessageA() fails it returns zero and does not touch buffer
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* so add trailing null byte */
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if( ret == 0 )
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error_buffer[pos] = '\0';
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if( pos > 1 )
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{
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/* POSIX says the string must not have trailing <newline> */
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if( error_buffer[pos-2] == '\r' && error_buffer[pos-1] == '\n' )
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error_buffer[pos-2] = '\0';
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}
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error_occurred = TRUE;
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}
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static void save_err_ptr_str( const void *ptr, DWORD dwMessageId )
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{
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char ptr_buf[2 + 2 * sizeof( ptr ) + 1];
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char num;
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size_t i;
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ptr_buf[0] = '0';
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ptr_buf[1] = 'x';
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for( i = 0; i < 2 * sizeof( ptr ); i++ )
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{
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num = (char) ( ( ( (ULONG_PTR) ptr ) >> ( 8 * sizeof( ptr ) - 4 * ( i + 1 ) ) ) & 0xF );
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ptr_buf[2 + i] = num + ( ( num < 0xA ) ? '0' : ( 'A' - 0xA ) );
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}
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ptr_buf[2 + 2 * sizeof( ptr )] = 0;
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save_err_str( ptr_buf, dwMessageId );
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}
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static UINT MySetErrorMode( UINT uMode )
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{
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static BOOL (WINAPI *SetThreadErrorModePtr)(DWORD, DWORD *) = NULL;
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static BOOL failed = FALSE;
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HMODULE kernel32;
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DWORD oldMode;
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if( !failed && SetThreadErrorModePtr == NULL )
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{
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kernel32 = GetModuleHandleA( "Kernel32.dll" );
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if( kernel32 != NULL )
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SetThreadErrorModePtr = (BOOL (WINAPI *)(DWORD, DWORD *)) (LPVOID) GetProcAddress( kernel32, "SetThreadErrorMode" );
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if( SetThreadErrorModePtr == NULL )
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failed = TRUE;
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}
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if( !failed )
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{
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if( !SetThreadErrorModePtr( uMode, &oldMode ) )
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return 0;
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else
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return oldMode;
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}
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else
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{
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return SetErrorMode( uMode );
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}
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}
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static HMODULE MyGetModuleHandleFromAddress( const void *addr )
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{
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static BOOL (WINAPI *GetModuleHandleExAPtr)(DWORD, LPCSTR, HMODULE *) = NULL;
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static BOOL failed = FALSE;
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HMODULE kernel32;
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HMODULE hModule;
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MEMORY_BASIC_INFORMATION info;
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SIZE_T sLen;
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if( !failed && GetModuleHandleExAPtr == NULL )
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{
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kernel32 = GetModuleHandleA( "Kernel32.dll" );
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if( kernel32 != NULL )
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GetModuleHandleExAPtr = (BOOL (WINAPI *)(DWORD, LPCSTR, HMODULE *)) (LPVOID) GetProcAddress( kernel32, "GetModuleHandleExA" );
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if( GetModuleHandleExAPtr == NULL )
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failed = TRUE;
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}
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if( !failed )
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{
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/* If GetModuleHandleExA is available use it with GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS */
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if( !GetModuleHandleExAPtr( GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, (const char *)addr, &hModule ) )
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return NULL;
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}
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else
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{
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/* To get HMODULE from address use undocumented hack from https://stackoverflow.com/a/2396380
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* The HMODULE of a DLL is the same value as the module's base address.
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*/
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sLen = VirtualQuery( addr, &info, sizeof( info ) );
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if( sLen != sizeof( info ) )
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return NULL;
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hModule = (HMODULE) info.AllocationBase;
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}
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return hModule;
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}
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/* Load Psapi.dll at runtime, this avoids linking caveat */
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static BOOL MyEnumProcessModules( HANDLE hProcess, HMODULE *lphModule, DWORD cb, LPDWORD lpcbNeeded )
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{
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static BOOL (WINAPI *EnumProcessModulesPtr)(HANDLE, HMODULE *, DWORD, LPDWORD) = NULL;
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static BOOL failed = FALSE;
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UINT uMode;
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HMODULE psapi;
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if( failed )
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return FALSE;
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if( EnumProcessModulesPtr == NULL )
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{
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/* Windows 7 and newer versions have K32EnumProcessModules in Kernel32.dll which is always pre-loaded */
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psapi = GetModuleHandleA( "Kernel32.dll" );
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if( psapi != NULL )
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EnumProcessModulesPtr = (BOOL (WINAPI *)(HANDLE, HMODULE *, DWORD, LPDWORD)) (LPVOID) GetProcAddress( psapi, "K32EnumProcessModules" );
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/* Windows Vista and older version have EnumProcessModules in Psapi.dll which needs to be loaded */
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if( EnumProcessModulesPtr == NULL )
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{
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/* Do not let Windows display the critical-error-handler message box */
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uMode = MySetErrorMode( SEM_FAILCRITICALERRORS );
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psapi = LoadLibraryA( "Psapi.dll" );
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if( psapi != NULL )
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{
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EnumProcessModulesPtr = (BOOL (WINAPI *)(HANDLE, HMODULE *, DWORD, LPDWORD)) (LPVOID) GetProcAddress( psapi, "EnumProcessModules" );
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if( EnumProcessModulesPtr == NULL )
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FreeLibrary( psapi );
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}
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MySetErrorMode( uMode );
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}
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if( EnumProcessModulesPtr == NULL )
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{
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failed = TRUE;
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return FALSE;
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}
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}
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return EnumProcessModulesPtr( hProcess, lphModule, cb, lpcbNeeded );
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}
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DLFCN_EXPORT
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void *dlopen( const char *file, int mode )
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{
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HMODULE hModule;
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UINT uMode;
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error_occurred = FALSE;
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/* Do not let Windows display the critical-error-handler message box */
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uMode = MySetErrorMode( SEM_FAILCRITICALERRORS );
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if( file == NULL )
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{
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/* POSIX says that if the value of file is NULL, a handle on a global
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* symbol object must be provided. That object must be able to access
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* all symbols from the original program file, and any objects loaded
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* with the RTLD_GLOBAL flag.
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* The return value from GetModuleHandle( ) allows us to retrieve
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* symbols only from the original program file. EnumProcessModules() is
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* used to access symbols from other libraries. For objects loaded
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* with the RTLD_LOCAL flag, we create our own list later on. They are
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* excluded from EnumProcessModules() iteration.
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*/
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hModule = GetModuleHandle( NULL );
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if( !hModule )
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save_err_str( "(null)", GetLastError( ) );
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}
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else
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{
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HANDLE hCurrentProc;
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DWORD dwProcModsBefore, dwProcModsAfter;
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char lpFileName[MAX_PATH];
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size_t i, len;
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len = strlen( file );
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if( len >= sizeof( lpFileName ) )
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{
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save_err_str( file, ERROR_FILENAME_EXCED_RANGE );
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hModule = NULL;
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}
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else
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{
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/* MSDN says backslashes *must* be used instead of forward slashes. */
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for( i = 0; i < len; i++ )
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{
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if( file[i] == '/' )
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lpFileName[i] = '\\';
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else
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lpFileName[i] = file[i];
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}
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lpFileName[len] = '\0';
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hCurrentProc = GetCurrentProcess( );
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if( MyEnumProcessModules( hCurrentProc, NULL, 0, &dwProcModsBefore ) == 0 )
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dwProcModsBefore = 0;
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/* POSIX says the search path is implementation-defined.
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||||||
|
* LOAD_WITH_ALTERED_SEARCH_PATH is used to make it behave more closely
|
||||||
|
* to UNIX's search paths (start with system folders instead of current
|
||||||
|
* folder).
|
||||||
|
*/
|
||||||
|
hModule = LoadLibraryExA( lpFileName, NULL, LOAD_WITH_ALTERED_SEARCH_PATH );
|
||||||
|
|
||||||
|
if( !hModule )
|
||||||
|
{
|
||||||
|
save_err_str( lpFileName, GetLastError( ) );
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
if( MyEnumProcessModules( hCurrentProc, NULL, 0, &dwProcModsAfter ) == 0 )
|
||||||
|
dwProcModsAfter = 0;
|
||||||
|
|
||||||
|
/* If the object was loaded with RTLD_LOCAL, add it to list of local
|
||||||
|
* objects, so that its symbols cannot be retrieved even if the handle for
|
||||||
|
* the original program file is passed. POSIX says that if the same
|
||||||
|
* file is specified in multiple invocations, and any of them are
|
||||||
|
* RTLD_GLOBAL, even if any further invocations use RTLD_LOCAL, the
|
||||||
|
* symbols will remain global. If number of loaded modules was not
|
||||||
|
* changed after calling LoadLibraryEx(), it means that library was
|
||||||
|
* already loaded.
|
||||||
|
*/
|
||||||
|
if( (mode & RTLD_LOCAL) && dwProcModsBefore != dwProcModsAfter )
|
||||||
|
{
|
||||||
|
if( !local_add( hModule ) )
|
||||||
|
{
|
||||||
|
save_err_str( lpFileName, ERROR_NOT_ENOUGH_MEMORY );
|
||||||
|
FreeLibrary( hModule );
|
||||||
|
hModule = NULL;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else if( !(mode & RTLD_LOCAL) && dwProcModsBefore == dwProcModsAfter )
|
||||||
|
{
|
||||||
|
local_rem( hModule );
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Return to previous state of the error-mode bit flags. */
|
||||||
|
MySetErrorMode( uMode );
|
||||||
|
|
||||||
|
return (void *) hModule;
|
||||||
|
}
|
||||||
|
|
||||||
|
DLFCN_EXPORT
|
||||||
|
int dlclose( void *handle )
|
||||||
|
{
|
||||||
|
HMODULE hModule = (HMODULE) handle;
|
||||||
|
BOOL ret;
|
||||||
|
|
||||||
|
error_occurred = FALSE;
|
||||||
|
|
||||||
|
ret = FreeLibrary( hModule );
|
||||||
|
|
||||||
|
/* If the object was loaded with RTLD_LOCAL, remove it from list of local
|
||||||
|
* objects.
|
||||||
|
*/
|
||||||
|
if( ret )
|
||||||
|
local_rem( hModule );
|
||||||
|
else
|
||||||
|
save_err_ptr_str( handle, GetLastError( ) );
|
||||||
|
|
||||||
|
/* dlclose's return value in inverted in relation to FreeLibrary's. */
|
||||||
|
ret = !ret;
|
||||||
|
|
||||||
|
return (int) ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
DLFCN_NOINLINE /* Needed for _ReturnAddress() */
|
||||||
|
DLFCN_EXPORT
|
||||||
|
void *dlsym( void *handle, const char *name )
|
||||||
|
{
|
||||||
|
FARPROC symbol;
|
||||||
|
HMODULE hCaller;
|
||||||
|
HMODULE hModule;
|
||||||
|
DWORD dwMessageId;
|
||||||
|
|
||||||
|
error_occurred = FALSE;
|
||||||
|
|
||||||
|
symbol = NULL;
|
||||||
|
hCaller = NULL;
|
||||||
|
hModule = GetModuleHandle( NULL );
|
||||||
|
dwMessageId = 0;
|
||||||
|
|
||||||
|
if( handle == RTLD_DEFAULT )
|
||||||
|
{
|
||||||
|
/* The symbol lookup happens in the normal global scope; that is,
|
||||||
|
* a search for a symbol using this handle would find the same
|
||||||
|
* definition as a direct use of this symbol in the program code.
|
||||||
|
* So use same lookup procedure as when filename is NULL.
|
||||||
|
*/
|
||||||
|
handle = hModule;
|
||||||
|
}
|
||||||
|
else if( handle == RTLD_NEXT )
|
||||||
|
{
|
||||||
|
/* Specifies the next object after this one that defines name.
|
||||||
|
* This one refers to the object containing the invocation of dlsym().
|
||||||
|
* The next object is the one found upon the application of a load
|
||||||
|
* order symbol resolution algorithm. To get caller function of dlsym()
|
||||||
|
* use _ReturnAddress() intrinsic. To get HMODULE of caller function
|
||||||
|
* use MyGetModuleHandleFromAddress() which calls either standard
|
||||||
|
* GetModuleHandleExA() function or hack via VirtualQuery().
|
||||||
|
*/
|
||||||
|
hCaller = MyGetModuleHandleFromAddress( _ReturnAddress( ) );
|
||||||
|
|
||||||
|
if( hCaller == NULL )
|
||||||
|
{
|
||||||
|
dwMessageId = ERROR_INVALID_PARAMETER;
|
||||||
|
goto end;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if( handle != RTLD_NEXT )
|
||||||
|
{
|
||||||
|
symbol = GetProcAddress( (HMODULE) handle, name );
|
||||||
|
|
||||||
|
if( symbol != NULL )
|
||||||
|
goto end;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* If the handle for the original program file is passed, also search
|
||||||
|
* in all globally loaded objects.
|
||||||
|
*/
|
||||||
|
|
||||||
|
if( hModule == handle || handle == RTLD_NEXT )
|
||||||
|
{
|
||||||
|
HANDLE hCurrentProc;
|
||||||
|
HMODULE *modules;
|
||||||
|
DWORD cbNeeded;
|
||||||
|
DWORD dwSize;
|
||||||
|
size_t i;
|
||||||
|
|
||||||
|
hCurrentProc = GetCurrentProcess( );
|
||||||
|
|
||||||
|
/* GetModuleHandle( NULL ) only returns the current program file. So
|
||||||
|
* if we want to get ALL loaded module including those in linked DLLs,
|
||||||
|
* we have to use EnumProcessModules( ).
|
||||||
|
*/
|
||||||
|
if( MyEnumProcessModules( hCurrentProc, NULL, 0, &dwSize ) != 0 )
|
||||||
|
{
|
||||||
|
modules = (HMODULE *)malloc( dwSize );
|
||||||
|
if( modules )
|
||||||
|
{
|
||||||
|
if( MyEnumProcessModules( hCurrentProc, modules, dwSize, &cbNeeded ) != 0 && dwSize == cbNeeded )
|
||||||
|
{
|
||||||
|
for( i = 0; i < dwSize / sizeof( HMODULE ); i++ )
|
||||||
|
{
|
||||||
|
if( handle == RTLD_NEXT && hCaller )
|
||||||
|
{
|
||||||
|
/* Next modules can be used for RTLD_NEXT */
|
||||||
|
if( hCaller == modules[i] )
|
||||||
|
hCaller = NULL;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
if( local_search( modules[i] ) )
|
||||||
|
continue;
|
||||||
|
symbol = GetProcAddress( modules[i], name );
|
||||||
|
if( symbol != NULL )
|
||||||
|
{
|
||||||
|
free( modules );
|
||||||
|
goto end;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
free( modules );
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
dwMessageId = ERROR_NOT_ENOUGH_MEMORY;
|
||||||
|
goto end;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
end:
|
||||||
|
if( symbol == NULL )
|
||||||
|
{
|
||||||
|
if( !dwMessageId )
|
||||||
|
dwMessageId = ERROR_PROC_NOT_FOUND;
|
||||||
|
save_err_str( name, dwMessageId );
|
||||||
|
}
|
||||||
|
|
||||||
|
return *(void **) (&symbol);
|
||||||
|
}
|
||||||
|
|
||||||
|
DLFCN_EXPORT
|
||||||
|
char *dlerror( void )
|
||||||
|
{
|
||||||
|
/* If this is the second consecutive call to dlerror, return NULL */
|
||||||
|
if( !error_occurred )
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
/* POSIX says that invoking dlerror( ) a second time, immediately following
|
||||||
|
* a prior invocation, shall result in NULL being returned.
|
||||||
|
*/
|
||||||
|
error_occurred = FALSE;
|
||||||
|
|
||||||
|
return error_buffer;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* See https://docs.microsoft.com/en-us/archive/msdn-magazine/2002/march/inside-windows-an-in-depth-look-into-the-win32-portable-executable-file-format-part-2
|
||||||
|
* for details */
|
||||||
|
|
||||||
|
/* Get specific image section */
|
||||||
|
static BOOL get_image_section( HMODULE module, int index, void **ptr, DWORD *size )
|
||||||
|
{
|
||||||
|
IMAGE_DOS_HEADER *dosHeader;
|
||||||
|
IMAGE_NT_HEADERS *ntHeaders;
|
||||||
|
IMAGE_OPTIONAL_HEADER *optionalHeader;
|
||||||
|
|
||||||
|
dosHeader = (IMAGE_DOS_HEADER *) module;
|
||||||
|
|
||||||
|
if( dosHeader->e_magic != IMAGE_DOS_SIGNATURE )
|
||||||
|
return FALSE;
|
||||||
|
|
||||||
|
ntHeaders = (IMAGE_NT_HEADERS *) ( (BYTE *) dosHeader + dosHeader->e_lfanew );
|
||||||
|
|
||||||
|
if( ntHeaders->Signature != IMAGE_NT_SIGNATURE )
|
||||||
|
return FALSE;
|
||||||
|
|
||||||
|
optionalHeader = &ntHeaders->OptionalHeader;
|
||||||
|
|
||||||
|
if( optionalHeader->Magic != IMAGE_NT_OPTIONAL_HDR_MAGIC )
|
||||||
|
return FALSE;
|
||||||
|
|
||||||
|
if( index < 0 || index > IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR )
|
||||||
|
return FALSE;
|
||||||
|
|
||||||
|
if( optionalHeader->DataDirectory[index].Size == 0 || optionalHeader->DataDirectory[index].VirtualAddress == 0 )
|
||||||
|
return FALSE;
|
||||||
|
|
||||||
|
if( size != NULL )
|
||||||
|
*size = optionalHeader->DataDirectory[index].Size;
|
||||||
|
|
||||||
|
*ptr = (void *)( (BYTE *) module + optionalHeader->DataDirectory[index].VirtualAddress );
|
||||||
|
|
||||||
|
return TRUE;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Return symbol name for a given address from export table */
|
||||||
|
static const char *get_export_symbol_name( HMODULE module, IMAGE_EXPORT_DIRECTORY *ied, const void *addr, void **func_address )
|
||||||
|
{
|
||||||
|
DWORD i;
|
||||||
|
void *candidateAddr = NULL;
|
||||||
|
int candidateIndex = -1;
|
||||||
|
BYTE *base = (BYTE *) module;
|
||||||
|
DWORD *functionAddressesOffsets = (DWORD *) (base + ied->AddressOfFunctions);
|
||||||
|
DWORD *functionNamesOffsets = (DWORD *) (base + ied->AddressOfNames);
|
||||||
|
USHORT *functionNameOrdinalsIndexes = (USHORT *) (base + ied->AddressOfNameOrdinals);
|
||||||
|
|
||||||
|
for( i = 0; i < ied->NumberOfFunctions; i++ )
|
||||||
|
{
|
||||||
|
if( (void *) ( base + functionAddressesOffsets[i] ) > addr || candidateAddr >= (void *) ( base + functionAddressesOffsets[i] ) )
|
||||||
|
continue;
|
||||||
|
|
||||||
|
candidateAddr = (void *) ( base + functionAddressesOffsets[i] );
|
||||||
|
candidateIndex = i;
|
||||||
|
}
|
||||||
|
|
||||||
|
if( candidateIndex == -1 )
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
*func_address = candidateAddr;
|
||||||
|
|
||||||
|
for( i = 0; i < ied->NumberOfNames; i++ )
|
||||||
|
{
|
||||||
|
if( functionNameOrdinalsIndexes[i] == candidateIndex )
|
||||||
|
return (const char *) ( base + functionNamesOffsets[i] );
|
||||||
|
}
|
||||||
|
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static BOOL is_valid_address( const void *addr )
|
||||||
|
{
|
||||||
|
MEMORY_BASIC_INFORMATION info;
|
||||||
|
SIZE_T result;
|
||||||
|
|
||||||
|
if( addr == NULL )
|
||||||
|
return FALSE;
|
||||||
|
|
||||||
|
/* check valid pointer */
|
||||||
|
result = VirtualQuery( addr, &info, sizeof( info ) );
|
||||||
|
|
||||||
|
if( result == 0 || info.AllocationBase == NULL || info.AllocationProtect == 0 || info.AllocationProtect == PAGE_NOACCESS )
|
||||||
|
return FALSE;
|
||||||
|
|
||||||
|
return TRUE;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Return state if address points to an import thunk
|
||||||
|
*
|
||||||
|
* An import thunk is setup with a 'jmp' instruction followed by an
|
||||||
|
* absolute address (32bit) or relative offset (64bit) pointing into
|
||||||
|
* the import address table (iat), which is partially maintained by
|
||||||
|
* the runtime linker.
|
||||||
|
*/
|
||||||
|
static BOOL is_import_thunk( const void *addr )
|
||||||
|
{
|
||||||
|
return *(short *) addr == 0x25ff ? TRUE : FALSE;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Return adress from the import address table (iat),
|
||||||
|
* if the original address points to a thunk table entry.
|
||||||
|
*/
|
||||||
|
static void *get_address_from_import_address_table( void *iat, DWORD iat_size, const void *addr )
|
||||||
|
{
|
||||||
|
BYTE *thkp = (BYTE *) addr;
|
||||||
|
/* Get offset from thunk table (after instruction 0xff 0x25)
|
||||||
|
* 4018c8 <_VirtualQuery>: ff 25 4a 8a 00 00
|
||||||
|
*/
|
||||||
|
ULONG offset = *(ULONG *)( thkp + 2 );
|
||||||
|
#ifdef _WIN64
|
||||||
|
/* On 64 bit the offset is relative
|
||||||
|
* 4018c8: ff 25 4a 8a 00 00 jmpq *0x8a4a(%rip) # 40a318 <__imp_VirtualQuery>
|
||||||
|
* And can be also negative (MSVC in WDK)
|
||||||
|
* 100002f20: ff 25 3a e1 ff ff jmpq *-0x1ec6(%rip) # 0x100001060
|
||||||
|
* So cast to signed LONG type
|
||||||
|
*/
|
||||||
|
BYTE *ptr = (BYTE *)( thkp + 6 + (LONG) offset );
|
||||||
|
#else
|
||||||
|
/* On 32 bit the offset is absolute
|
||||||
|
* 4019b4: ff 25 90 71 40 00 jmp *0x40719
|
||||||
|
*/
|
||||||
|
BYTE *ptr = (BYTE *) offset;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
if( !is_valid_address( ptr ) || ptr < (BYTE *) iat || ptr > (BYTE *) iat + iat_size )
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
return *(void **) ptr;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Holds module filename */
|
||||||
|
static char module_filename[2*MAX_PATH];
|
||||||
|
|
||||||
|
static BOOL fill_info( const void *addr, Dl_info *info )
|
||||||
|
{
|
||||||
|
HMODULE hModule;
|
||||||
|
DWORD dwSize;
|
||||||
|
IMAGE_EXPORT_DIRECTORY *ied;
|
||||||
|
void *funcAddress = NULL;
|
||||||
|
|
||||||
|
/* Get module of the specified address */
|
||||||
|
hModule = MyGetModuleHandleFromAddress( addr );
|
||||||
|
|
||||||
|
if( hModule == NULL )
|
||||||
|
return FALSE;
|
||||||
|
|
||||||
|
dwSize = GetModuleFileNameA( hModule, module_filename, sizeof( module_filename ) );
|
||||||
|
|
||||||
|
if( dwSize == 0 || dwSize == sizeof( module_filename ) )
|
||||||
|
return FALSE;
|
||||||
|
|
||||||
|
info->dli_fname = module_filename;
|
||||||
|
info->dli_fbase = (void *) hModule;
|
||||||
|
|
||||||
|
/* Find function name and function address in module's export table */
|
||||||
|
if( get_image_section( hModule, IMAGE_DIRECTORY_ENTRY_EXPORT, (void **) &ied, NULL ) )
|
||||||
|
info->dli_sname = get_export_symbol_name( hModule, ied, addr, &funcAddress );
|
||||||
|
else
|
||||||
|
info->dli_sname = NULL;
|
||||||
|
|
||||||
|
info->dli_saddr = info->dli_sname == NULL ? NULL : funcAddress != NULL ? funcAddress : (void *) addr;
|
||||||
|
|
||||||
|
return TRUE;
|
||||||
|
}
|
||||||
|
|
||||||
|
DLFCN_EXPORT
|
||||||
|
int dladdr( const void *addr, Dl_info *info )
|
||||||
|
{
|
||||||
|
if( info == NULL )
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
if( !is_valid_address( addr ) )
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
if( is_import_thunk( addr ) )
|
||||||
|
{
|
||||||
|
void *iat;
|
||||||
|
DWORD iatSize;
|
||||||
|
HMODULE hModule;
|
||||||
|
|
||||||
|
/* Get module of the import thunk address */
|
||||||
|
hModule = MyGetModuleHandleFromAddress( addr );
|
||||||
|
|
||||||
|
if( hModule == NULL )
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
if( !get_image_section( hModule, IMAGE_DIRECTORY_ENTRY_IAT, &iat, &iatSize ) )
|
||||||
|
{
|
||||||
|
/* Fallback for cases where the iat is not defined,
|
||||||
|
* for example i586-mingw32msvc-gcc */
|
||||||
|
IMAGE_IMPORT_DESCRIPTOR *iid;
|
||||||
|
DWORD iidSize;
|
||||||
|
|
||||||
|
if( !get_image_section( hModule, IMAGE_DIRECTORY_ENTRY_IMPORT, (void **) &iid, &iidSize ) )
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
if( iid == NULL || iid->Characteristics == 0 || iid->FirstThunk == 0 )
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
iat = (void *)( (BYTE *) hModule + iid->FirstThunk );
|
||||||
|
/* We assume that in this case iid and iat's are in linear order */
|
||||||
|
iatSize = iidSize - (DWORD) ( (BYTE *) iat - (BYTE *) iid );
|
||||||
|
}
|
||||||
|
|
||||||
|
addr = get_address_from_import_address_table( iat, iatSize, addr );
|
||||||
|
|
||||||
|
if( !is_valid_address( addr ) )
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
if( !fill_info( addr, info ) )
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifdef DLFCN_WIN32_SHARED
|
||||||
|
BOOL WINAPI DllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
|
||||||
|
{
|
||||||
|
(void) hinstDLL;
|
||||||
|
(void) fdwReason;
|
||||||
|
(void) lpvReserved;
|
||||||
|
return TRUE;
|
||||||
|
}
|
||||||
|
#endif
|
||||||
94
libs/dlfcn-win32/dlfcn.h
Normal file
94
libs/dlfcn-win32/dlfcn.h
Normal file
|
|
@ -0,0 +1,94 @@
|
||||||
|
/*
|
||||||
|
* dlfcn-win32
|
||||||
|
* Copyright (c) 2007 Ramiro Polla
|
||||||
|
*
|
||||||
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||||
|
* of this software and associated documentation files (the "Software"), to deal
|
||||||
|
* in the Software without restriction, including without limitation the rights
|
||||||
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||||
|
* copies of the Software, and to permit persons to whom the Software is
|
||||||
|
* furnished to do so, subject to the following conditions:
|
||||||
|
*
|
||||||
|
* The above copyright notice and this permission notice shall be included in
|
||||||
|
* all copies or substantial portions of the Software.
|
||||||
|
*
|
||||||
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||||
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||||
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
||||||
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||||
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||||
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||||
|
* THE SOFTWARE.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef DLFCN_H
|
||||||
|
#define DLFCN_H
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
extern "C" {
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined(DLFCN_WIN32_SHARED)
|
||||||
|
#if defined(DLFCN_WIN32_EXPORTS)
|
||||||
|
# define DLFCN_EXPORT __declspec(dllexport)
|
||||||
|
#else
|
||||||
|
# define DLFCN_EXPORT __declspec(dllimport)
|
||||||
|
#endif
|
||||||
|
#else
|
||||||
|
# define DLFCN_EXPORT
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* Relocations are performed when the object is loaded. */
|
||||||
|
#define RTLD_NOW 0
|
||||||
|
|
||||||
|
/* Relocations are performed at an implementation-defined time.
|
||||||
|
* Windows API does not support lazy symbol resolving (when first reference
|
||||||
|
* to a given symbol occurs). So RTLD_LAZY implementation is same as RTLD_NOW.
|
||||||
|
*/
|
||||||
|
#define RTLD_LAZY RTLD_NOW
|
||||||
|
|
||||||
|
/* All symbols are available for relocation processing of other modules. */
|
||||||
|
#define RTLD_GLOBAL (1 << 1)
|
||||||
|
|
||||||
|
/* All symbols are not made available for relocation processing by other modules. */
|
||||||
|
#define RTLD_LOCAL (1 << 2)
|
||||||
|
|
||||||
|
/* These two were added in The Open Group Base Specifications Issue 6.
|
||||||
|
* Note: All other RTLD_* flags in any dlfcn.h are not standard compliant.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* The symbol lookup happens in the normal global scope. */
|
||||||
|
#define RTLD_DEFAULT ((void *)0)
|
||||||
|
|
||||||
|
/* Specifies the next object after this one that defines name. */
|
||||||
|
#define RTLD_NEXT ((void *)-1)
|
||||||
|
|
||||||
|
/* Structure filled in by dladdr() */
|
||||||
|
typedef struct dl_info
|
||||||
|
{
|
||||||
|
const char *dli_fname; /* Filename of defining object (thread unsafe and reused on every call to dladdr) */
|
||||||
|
void *dli_fbase; /* Load address of that object */
|
||||||
|
const char *dli_sname; /* Name of nearest lower symbol */
|
||||||
|
void *dli_saddr; /* Exact value of nearest symbol */
|
||||||
|
} Dl_info;
|
||||||
|
|
||||||
|
/* Open a symbol table handle. */
|
||||||
|
DLFCN_EXPORT void *dlopen(const char *file, int mode);
|
||||||
|
|
||||||
|
/* Close a symbol table handle. */
|
||||||
|
DLFCN_EXPORT int dlclose(void *handle);
|
||||||
|
|
||||||
|
/* Get the address of a symbol from a symbol table handle. */
|
||||||
|
DLFCN_EXPORT void *dlsym(void *handle, const char *name);
|
||||||
|
|
||||||
|
/* Get diagnostic information. */
|
||||||
|
DLFCN_EXPORT char *dlerror(void);
|
||||||
|
|
||||||
|
/* Translate address to symbolic information (no POSIX standard) */
|
||||||
|
DLFCN_EXPORT int dladdr(const void *addr, Dl_info *info);
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif /* DLFCN_H */
|
||||||
Loading…
Add table
Add a link
Reference in a new issue