mirror of
https://github.com/estkme-group/lpac
synced 2024-09-11 19:40:49 +02:00
* feat: $PWD independent executable file - Use RPATH on Linux/macOS to ensure it will search directory that contains lpac executable file. - Windows doesnn't has RPATH, but it will search executable file directory by default. And CMake will ignore BUILD_RPATH property on Windows safely. - BUILD_RPATH doesn't affect files after cmake --install, but we doesn't declare install rule now (And we use RUNTIME_OUTPUT_DIRECTORY so we actually use non-install-style). If we need install-style in future, we can set INSTALL_RPATH_USE_LINK_PATH property so CMake will ensure it will work. * fix(dlfcn-win32): remove LOAD_WITH_ALTERED_SEARCH_PATH to avoid UB and ensure PWD-independent-exe work If use LOAD_WITH_ALTERED_SEARCH_PATH, relative path will lead to undefined behavior. And it can't provide expected behavior because it just change search order rather than remove binary directory. See also: https://github.com/dlfcn-win32/dlfcn-win32/issues/104
909 lines
28 KiB
C
909 lines
28 KiB
C
/*
|
|
* dlfcn-win32
|
|
* Copyright (c) 2007 Ramiro Polla
|
|
* Copyright (c) 2015 Tiancheng "Timothy" Gu
|
|
* Copyright (c) 2019 Pali Rohár <pali.rohar@gmail.com>
|
|
* Copyright (c) 2020 Ralf Habacker <ralf.habacker@freenet.de>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifdef _DEBUG
|
|
#define _CRTDBG_MAP_ALLOC
|
|
#include <stdlib.h>
|
|
#include <crtdbg.h>
|
|
#endif
|
|
#include <windows.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
/* Older versions do not have this type */
|
|
#if _WIN32_WINNT < 0x0500
|
|
typedef ULONG ULONG_PTR;
|
|
#endif
|
|
|
|
/* Older SDK versions do not have these macros */
|
|
#ifndef GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
|
|
#define GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS 0x4
|
|
#endif
|
|
#ifndef GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT
|
|
#define GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT 0x2
|
|
#endif
|
|
#ifndef IMAGE_NT_OPTIONAL_HDR_MAGIC
|
|
#ifdef _WIN64
|
|
#define IMAGE_NT_OPTIONAL_HDR_MAGIC 0x20b
|
|
#else
|
|
#define IMAGE_NT_OPTIONAL_HDR_MAGIC 0x10b
|
|
#endif
|
|
#endif
|
|
#ifndef IMAGE_DIRECTORY_ENTRY_IAT
|
|
#define IMAGE_DIRECTORY_ENTRY_IAT 12
|
|
#endif
|
|
#ifndef LOAD_WITH_ALTERED_SEARCH_PATH
|
|
#define LOAD_WITH_ALTERED_SEARCH_PATH 0x8
|
|
#endif
|
|
|
|
#ifdef _MSC_VER
|
|
#if _MSC_VER >= 1000
|
|
/* https://docs.microsoft.com/en-us/cpp/intrinsics/returnaddress */
|
|
#pragma intrinsic( _ReturnAddress )
|
|
#else
|
|
/* On older version read return address from the value on stack pointer + 4 of
|
|
* the caller. Caller stack pointer is stored in EBP register but only when
|
|
* the EBP register is not optimized out. Usage of _alloca() function prevent
|
|
* EBP register optimization. Read value of EBP + 4 via inline assembly. And
|
|
* because inline assembly does not have a return value, put it into naked
|
|
* function which does not have prologue and epilogue and preserve registers.
|
|
*/
|
|
__declspec( naked ) static void *_ReturnAddress( void ) { __asm mov eax, [ebp+4] __asm ret }
|
|
#define _ReturnAddress( ) ( _alloca(1), _ReturnAddress( ) )
|
|
#endif
|
|
#else
|
|
/* https://gcc.gnu.org/onlinedocs/gcc/Return-Address.html */
|
|
#ifndef _ReturnAddress
|
|
#define _ReturnAddress( ) ( __builtin_extract_return_addr( __builtin_return_address( 0 ) ) )
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef DLFCN_WIN32_SHARED
|
|
#define DLFCN_WIN32_EXPORTS
|
|
#endif
|
|
#include "dlfcn.h"
|
|
|
|
#if defined( _MSC_VER ) && _MSC_VER >= 1300
|
|
/* https://docs.microsoft.com/en-us/cpp/cpp/noinline */
|
|
#define DLFCN_NOINLINE __declspec( noinline )
|
|
#elif defined( __GNUC__ ) && ( ( __GNUC__ > 3 ) || ( __GNUC__ == 3 && __GNUC_MINOR__ >= 1 ) )
|
|
/* https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html */
|
|
#define DLFCN_NOINLINE __attribute__(( noinline ))
|
|
#else
|
|
#define DLFCN_NOINLINE
|
|
#endif
|
|
|
|
/* Note:
|
|
* MSDN says these functions are not thread-safe. We make no efforts to have
|
|
* any kind of thread safety.
|
|
*/
|
|
|
|
typedef struct local_object {
|
|
HMODULE hModule;
|
|
struct local_object *previous;
|
|
struct local_object *next;
|
|
} local_object;
|
|
|
|
static local_object first_object;
|
|
|
|
/* These functions implement a double linked list for the local objects. */
|
|
static local_object *local_search( HMODULE hModule )
|
|
{
|
|
local_object *pobject;
|
|
|
|
if( hModule == NULL )
|
|
return NULL;
|
|
|
|
for( pobject = &first_object; pobject; pobject = pobject->next )
|
|
if( pobject->hModule == hModule )
|
|
return pobject;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static BOOL local_add( HMODULE hModule )
|
|
{
|
|
local_object *pobject;
|
|
local_object *nobject;
|
|
|
|
if( hModule == NULL )
|
|
return TRUE;
|
|
|
|
pobject = local_search( hModule );
|
|
|
|
/* Do not add object again if it's already on the list */
|
|
if( pobject != NULL )
|
|
return TRUE;
|
|
|
|
for( pobject = &first_object; pobject->next; pobject = pobject->next );
|
|
|
|
nobject = (local_object *) malloc( sizeof( local_object ) );
|
|
|
|
if( !nobject )
|
|
return FALSE;
|
|
|
|
pobject->next = nobject;
|
|
nobject->next = NULL;
|
|
nobject->previous = pobject;
|
|
nobject->hModule = hModule;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void local_rem( HMODULE hModule )
|
|
{
|
|
local_object *pobject;
|
|
|
|
if( hModule == NULL )
|
|
return;
|
|
|
|
pobject = local_search( hModule );
|
|
|
|
if( pobject == NULL )
|
|
return;
|
|
|
|
if( pobject->next )
|
|
pobject->next->previous = pobject->previous;
|
|
if( pobject->previous )
|
|
pobject->previous->next = pobject->next;
|
|
|
|
free( pobject );
|
|
}
|
|
|
|
/* POSIX says dlerror( ) doesn't have to be thread-safe, so we use one
|
|
* static buffer.
|
|
* MSDN says the buffer cannot be larger than 64K bytes, so we set it to
|
|
* the limit.
|
|
*/
|
|
static char error_buffer[65535];
|
|
static BOOL error_occurred;
|
|
|
|
static void save_err_str( const char *str, DWORD dwMessageId )
|
|
{
|
|
DWORD ret;
|
|
size_t pos, len;
|
|
|
|
len = strlen( str );
|
|
if( len > sizeof( error_buffer ) - 5 )
|
|
len = sizeof( error_buffer ) - 5;
|
|
|
|
/* Format error message to:
|
|
* "<argument to function that failed>": <Windows localized error message>
|
|
*/
|
|
pos = 0;
|
|
error_buffer[pos++] = '"';
|
|
memcpy( error_buffer + pos, str, len );
|
|
pos += len;
|
|
error_buffer[pos++] = '"';
|
|
error_buffer[pos++] = ':';
|
|
error_buffer[pos++] = ' ';
|
|
|
|
ret = FormatMessageA( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dwMessageId,
|
|
MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ),
|
|
error_buffer + pos, (DWORD) ( sizeof( error_buffer ) - pos ), NULL );
|
|
pos += ret;
|
|
|
|
/* When FormatMessageA() fails it returns zero and does not touch buffer
|
|
* so add trailing null byte */
|
|
if( ret == 0 )
|
|
error_buffer[pos] = '\0';
|
|
|
|
if( pos > 1 )
|
|
{
|
|
/* POSIX says the string must not have trailing <newline> */
|
|
if( error_buffer[pos-2] == '\r' && error_buffer[pos-1] == '\n' )
|
|
error_buffer[pos-2] = '\0';
|
|
}
|
|
|
|
error_occurred = TRUE;
|
|
}
|
|
|
|
static void save_err_ptr_str( const void *ptr, DWORD dwMessageId )
|
|
{
|
|
char ptr_buf[2 + 2 * sizeof( ptr ) + 1];
|
|
char num;
|
|
size_t i;
|
|
|
|
ptr_buf[0] = '0';
|
|
ptr_buf[1] = 'x';
|
|
|
|
for( i = 0; i < 2 * sizeof( ptr ); i++ )
|
|
{
|
|
num = (char) ( ( ( (ULONG_PTR) ptr ) >> ( 8 * sizeof( ptr ) - 4 * ( i + 1 ) ) ) & 0xF );
|
|
ptr_buf[2 + i] = num + ( ( num < 0xA ) ? '0' : ( 'A' - 0xA ) );
|
|
}
|
|
|
|
ptr_buf[2 + 2 * sizeof( ptr )] = 0;
|
|
|
|
save_err_str( ptr_buf, dwMessageId );
|
|
}
|
|
|
|
static UINT MySetErrorMode( UINT uMode )
|
|
{
|
|
static BOOL (WINAPI *SetThreadErrorModePtr)(DWORD, DWORD *) = NULL;
|
|
static BOOL failed = FALSE;
|
|
HMODULE kernel32;
|
|
DWORD oldMode;
|
|
|
|
if( !failed && SetThreadErrorModePtr == NULL )
|
|
{
|
|
kernel32 = GetModuleHandleA( "Kernel32.dll" );
|
|
if( kernel32 != NULL )
|
|
SetThreadErrorModePtr = (BOOL (WINAPI *)(DWORD, DWORD *)) (LPVOID) GetProcAddress( kernel32, "SetThreadErrorMode" );
|
|
if( SetThreadErrorModePtr == NULL )
|
|
failed = TRUE;
|
|
}
|
|
|
|
if( !failed )
|
|
{
|
|
if( !SetThreadErrorModePtr( uMode, &oldMode ) )
|
|
return 0;
|
|
else
|
|
return oldMode;
|
|
}
|
|
else
|
|
{
|
|
return SetErrorMode( uMode );
|
|
}
|
|
}
|
|
|
|
static HMODULE MyGetModuleHandleFromAddress( const void *addr )
|
|
{
|
|
static BOOL (WINAPI *GetModuleHandleExAPtr)(DWORD, LPCSTR, HMODULE *) = NULL;
|
|
static BOOL failed = FALSE;
|
|
HMODULE kernel32;
|
|
HMODULE hModule;
|
|
MEMORY_BASIC_INFORMATION info;
|
|
size_t sLen;
|
|
|
|
if( !failed && GetModuleHandleExAPtr == NULL )
|
|
{
|
|
kernel32 = GetModuleHandleA( "Kernel32.dll" );
|
|
if( kernel32 != NULL )
|
|
GetModuleHandleExAPtr = (BOOL (WINAPI *)(DWORD, LPCSTR, HMODULE *)) (LPVOID) GetProcAddress( kernel32, "GetModuleHandleExA" );
|
|
if( GetModuleHandleExAPtr == NULL )
|
|
failed = TRUE;
|
|
}
|
|
|
|
if( !failed )
|
|
{
|
|
/* If GetModuleHandleExA is available use it with GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS */
|
|
if( !GetModuleHandleExAPtr( GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, addr, &hModule ) )
|
|
return NULL;
|
|
}
|
|
else
|
|
{
|
|
/* To get HMODULE from address use undocumented hack from https://stackoverflow.com/a/2396380
|
|
* The HMODULE of a DLL is the same value as the module's base address.
|
|
*/
|
|
sLen = VirtualQuery( addr, &info, sizeof( info ) );
|
|
if( sLen != sizeof( info ) )
|
|
return NULL;
|
|
hModule = (HMODULE) info.AllocationBase;
|
|
}
|
|
|
|
return hModule;
|
|
}
|
|
|
|
/* Load Psapi.dll at runtime, this avoids linking caveat */
|
|
static BOOL MyEnumProcessModules( HANDLE hProcess, HMODULE *lphModule, DWORD cb, LPDWORD lpcbNeeded )
|
|
{
|
|
static BOOL (WINAPI *EnumProcessModulesPtr)(HANDLE, HMODULE *, DWORD, LPDWORD) = NULL;
|
|
static BOOL failed = FALSE;
|
|
UINT uMode;
|
|
HMODULE psapi;
|
|
|
|
if( failed )
|
|
return FALSE;
|
|
|
|
if( EnumProcessModulesPtr == NULL )
|
|
{
|
|
/* Windows 7 and newer versions have K32EnumProcessModules in Kernel32.dll which is always pre-loaded */
|
|
psapi = GetModuleHandleA( "Kernel32.dll" );
|
|
if( psapi != NULL )
|
|
EnumProcessModulesPtr = (BOOL (WINAPI *)(HANDLE, HMODULE *, DWORD, LPDWORD)) (LPVOID) GetProcAddress( psapi, "K32EnumProcessModules" );
|
|
|
|
/* Windows Vista and older version have EnumProcessModules in Psapi.dll which needs to be loaded */
|
|
if( EnumProcessModulesPtr == NULL )
|
|
{
|
|
/* Do not let Windows display the critical-error-handler message box */
|
|
uMode = MySetErrorMode( SEM_FAILCRITICALERRORS );
|
|
psapi = LoadLibraryA( "Psapi.dll" );
|
|
if( psapi != NULL )
|
|
{
|
|
EnumProcessModulesPtr = (BOOL (WINAPI *)(HANDLE, HMODULE *, DWORD, LPDWORD)) (LPVOID) GetProcAddress( psapi, "EnumProcessModules" );
|
|
if( EnumProcessModulesPtr == NULL )
|
|
FreeLibrary( psapi );
|
|
}
|
|
MySetErrorMode( uMode );
|
|
}
|
|
|
|
if( EnumProcessModulesPtr == NULL )
|
|
{
|
|
failed = TRUE;
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return EnumProcessModulesPtr( hProcess, lphModule, cb, lpcbNeeded );
|
|
}
|
|
|
|
DLFCN_EXPORT
|
|
void *dlopen( const char *file, int mode )
|
|
{
|
|
HMODULE hModule;
|
|
UINT uMode;
|
|
|
|
error_occurred = FALSE;
|
|
|
|
/* Do not let Windows display the critical-error-handler message box */
|
|
uMode = MySetErrorMode( SEM_FAILCRITICALERRORS );
|
|
|
|
if( file == NULL )
|
|
{
|
|
/* POSIX says that if the value of file is NULL, a handle on a global
|
|
* symbol object must be provided. That object must be able to access
|
|
* all symbols from the original program file, and any objects loaded
|
|
* with the RTLD_GLOBAL flag.
|
|
* The return value from GetModuleHandle( ) allows us to retrieve
|
|
* symbols only from the original program file. EnumProcessModules() is
|
|
* used to access symbols from other libraries. For objects loaded
|
|
* with the RTLD_LOCAL flag, we create our own list later on. They are
|
|
* excluded from EnumProcessModules() iteration.
|
|
*/
|
|
hModule = GetModuleHandle( NULL );
|
|
|
|
if( !hModule )
|
|
save_err_str( "(null)", GetLastError( ) );
|
|
}
|
|
else
|
|
{
|
|
HANDLE hCurrentProc;
|
|
DWORD dwProcModsBefore, dwProcModsAfter;
|
|
char lpFileName[MAX_PATH];
|
|
size_t i, len;
|
|
|
|
len = strlen( file );
|
|
|
|
if( len >= sizeof( lpFileName ) )
|
|
{
|
|
save_err_str( file, ERROR_FILENAME_EXCED_RANGE );
|
|
hModule = NULL;
|
|
}
|
|
else
|
|
{
|
|
/* MSDN says backslashes *must* be used instead of forward slashes. */
|
|
for( i = 0; i < len; i++ )
|
|
{
|
|
if( file[i] == '/' )
|
|
lpFileName[i] = '\\';
|
|
else
|
|
lpFileName[i] = file[i];
|
|
}
|
|
lpFileName[len] = '\0';
|
|
|
|
hCurrentProc = GetCurrentProcess( );
|
|
|
|
if( MyEnumProcessModules( hCurrentProc, NULL, 0, &dwProcModsBefore ) == 0 )
|
|
dwProcModsBefore = 0;
|
|
|
|
/* POSIX says the search path is implementation-defined.
|
|
* 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).
|
|
* FIXME: Remove LOAD_WITH_ALTERED_SEARCH_PATH because it lead to Undefined
|
|
* Behavior and doesn't provide expected search paths.
|
|
* See also: https://github.com/dlfcn-win32/dlfcn-win32/issues/104
|
|
*/
|
|
hModule = LoadLibraryExA( lpFileName, NULL, NULL );
|
|
|
|
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 = 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_NUMBEROF_DIRECTORY_ENTRIES || index >= optionalHeader->NumberOfRvaAndSizes )
|
|
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 + (DWORD) ied->AddressOfFunctions);
|
|
DWORD *functionNamesOffsets = (DWORD *) (base + (DWORD) ied->AddressOfNames);
|
|
USHORT *functionNameOrdinalsIndexes = (USHORT *) (base + (DWORD) 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;
|
|
}
|
|
|
|
#if defined(_M_ARM64) || defined(__aarch64__)
|
|
static INT64 sign_extend(UINT64 value, UINT bits)
|
|
{
|
|
const UINT left = 64 - bits;
|
|
const INT64 m1 = -1;
|
|
const INT64 wide = (INT64) (value << left);
|
|
const INT64 sign = ( wide < 0 ) ? ( m1 << left ) : 0;
|
|
|
|
return value | sign;
|
|
}
|
|
#endif
|
|
|
|
/* Return state if address points to an import thunk
|
|
*
|
|
* On x86, 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.
|
|
*
|
|
* On ARM64, an import thunk is also a relative jump pointing into the
|
|
* import address table, implemented by the following three instructions:
|
|
*
|
|
* adrp x16, [page_offset]
|
|
* Calculates the page address (aligned to 4KB) the IAT is at, based
|
|
* on the value of x16, with page_offset.
|
|
*
|
|
* ldr x16, [x16, offset]
|
|
* Calculates the final IAT address, x16 <- x16 + offset.
|
|
*
|
|
* br x16
|
|
* Jump to the address in x16.
|
|
*
|
|
* The register used here is hardcoded to be x16.
|
|
*/
|
|
static BOOL is_import_thunk( const void *addr )
|
|
{
|
|
#if defined(_M_ARM64) || defined(__aarch64__)
|
|
ULONG opCode1 = * (ULONG *) ( (BYTE *) addr );
|
|
ULONG opCode2 = * (ULONG *) ( (BYTE *) addr + 4 );
|
|
ULONG opCode3 = * (ULONG *) ( (BYTE *) addr + 8 );
|
|
|
|
return (opCode1 & 0x9f00001f) == 0x90000010 /* adrp x16, [page_offset] */
|
|
&& (opCode2 & 0xffe003ff) == 0xf9400210 /* ldr x16, [x16, offset] */
|
|
&& opCode3 == 0xd61f0200 /* br x16 */
|
|
? TRUE : FALSE;
|
|
#else
|
|
return *(short *) addr == 0x25ff ? TRUE : FALSE;
|
|
#endif
|
|
}
|
|
|
|
/* 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;
|
|
#if defined(_M_ARM64) || defined(__aarch64__)
|
|
/*
|
|
* typical import thunk in ARM64:
|
|
* 0x7ff772ae78c0 <+25760>: adrp x16, 1
|
|
* 0x7ff772ae78c4 <+25764>: ldr x16, [x16, #0xdc0]
|
|
* 0x7ff772ae78c8 <+25768>: br x16
|
|
*/
|
|
ULONG opCode1 = * (ULONG *) ( (BYTE *) addr );
|
|
ULONG opCode2 = * (ULONG *) ( (BYTE *) addr + 4 );
|
|
|
|
/* Extract the offset from adrp instruction */
|
|
UINT64 pageLow2 = (opCode1 >> 29) & 3;
|
|
UINT64 pageHigh19 = (opCode1 >> 5) & ~(~0ull << 19);
|
|
INT64 page = sign_extend((pageHigh19 << 2) | pageLow2, 21) << 12;
|
|
|
|
/* Extract the offset from ldr instruction */
|
|
UINT64 offset = ((opCode2 >> 10) & ~(~0ull << 12)) << 3;
|
|
|
|
/* Calculate the final address */
|
|
BYTE *ptr = (BYTE *) ( (ULONG64) thkp & ~0xfffull ) + page + offset;
|
|
#else
|
|
/* Get offset from thunk table (after instruction 0xff 0x25)
|
|
* 4018c8 <_VirtualQuery>: ff 25 4a 8a 00 00
|
|
*/
|
|
ULONG offset = *(ULONG *)( thkp + 2 );
|
|
#if defined(_M_AMD64) || defined(__x86_64__)
|
|
/* 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
|
|
#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 + (DWORD) 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
|