/* * Win32 relay and snoop functions * * Copyright 1997 Alexandre Julliard * Copyright 1998 Marcus Meissner * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "config.h" #include "wine/port.h" #include #include #include #include #include "windef.h" #include "winternl.h" #include "excpt.h" #include "wine/exception.h" #include "ntdll_misc.h" #include "wine/unicode.h" #include "wine/debug.h" WINE_DEFAULT_DEBUG_CHANNEL(relay); WINE_DECLARE_DEBUG_CHANNEL(snoop); WINE_DECLARE_DEBUG_CHANNEL(seh); #ifdef __i386__ static const WCHAR **debug_relay_excludelist; static const WCHAR **debug_relay_includelist; static const WCHAR **debug_snoop_excludelist; static const WCHAR **debug_snoop_includelist; static const WCHAR **debug_from_relay_excludelist; static const WCHAR **debug_from_relay_includelist; static const WCHAR **debug_from_snoop_excludelist; static const WCHAR **debug_from_snoop_includelist; static BOOL init_done; /* compare an ASCII and a Unicode string without depending on the current codepage */ inline static int strcmpAW( const char *strA, const WCHAR *strW ) { while (*strA && ((unsigned char)*strA == *strW)) { strA++; strW++; } return (unsigned char)*strA - *strW; } /* compare an ASCII and a Unicode string without depending on the current codepage */ inline static int strncmpiAW( const char *strA, const WCHAR *strW, int n ) { int ret = 0; for ( ; n > 0; n--, strA++, strW++) if ((ret = toupperW((unsigned char)*strA) - toupperW(*strW)) || !*strA) break; return ret; } /*********************************************************************** * build_list * * Build a function list from a ';'-separated string. */ static const WCHAR **build_list( const WCHAR *buffer ) { int count = 1; const WCHAR *p = buffer; const WCHAR **ret; while ((p = strchrW( p, ';' ))) { count++; p++; } /* allocate count+1 pointers, plus the space for a copy of the string */ if ((ret = RtlAllocateHeap( GetProcessHeap(), 0, (count+1) * sizeof(WCHAR*) + (strlenW(buffer)+1) * sizeof(WCHAR) ))) { WCHAR *str = (WCHAR *)(ret + count + 1); WCHAR *p = str; strcpyW( str, buffer ); count = 0; for (;;) { ret[count++] = p; if (!(p = strchrW( p, ';' ))) break; *p++ = 0; } ret[count++] = NULL; } return ret; } /*********************************************************************** * init_debug_lists * * Build the relay include/exclude function lists. */ static void init_debug_lists(void) { OBJECT_ATTRIBUTES attr; UNICODE_STRING name; char buffer[1024]; HANDLE root, hkey; DWORD count; WCHAR *str; static const WCHAR configW[] = {'S','o','f','t','w','a','r','e','\\', 'W','i','n','e','\\', 'D','e','b','u','g',0}; static const WCHAR RelayIncludeW[] = {'R','e','l','a','y','I','n','c','l','u','d','e',0}; static const WCHAR RelayExcludeW[] = {'R','e','l','a','y','E','x','c','l','u','d','e',0}; static const WCHAR SnoopIncludeW[] = {'S','n','o','o','p','I','n','c','l','u','d','e',0}; static const WCHAR SnoopExcludeW[] = {'S','n','o','o','p','E','x','c','l','u','d','e',0}; static const WCHAR RelayFromIncludeW[] = {'R','e','l','a','y','F','r','o','m','I','n','c','l','u','d','e',0}; static const WCHAR RelayFromExcludeW[] = {'R','e','l','a','y','F','r','o','m','E','x','c','l','u','d','e',0}; static const WCHAR SnoopFromIncludeW[] = {'S','n','o','o','p','F','r','o','m','I','n','c','l','u','d','e',0}; static const WCHAR SnoopFromExcludeW[] = {'S','n','o','o','p','F','r','o','m','E','x','c','l','u','d','e',0}; if (init_done) return; init_done = TRUE; RtlOpenCurrentUser( KEY_ALL_ACCESS, &root ); attr.Length = sizeof(attr); attr.RootDirectory = root; attr.ObjectName = &name; attr.Attributes = 0; attr.SecurityDescriptor = NULL; attr.SecurityQualityOfService = NULL; RtlInitUnicodeString( &name, configW ); /* @@ Wine registry key: HKCU\Software\Wine\Debug */ if (NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr )) hkey = 0; NtClose( root ); if (!hkey) return; str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)buffer)->Data; RtlInitUnicodeString( &name, RelayIncludeW ); if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count )) { TRACE("RelayInclude = %s\n", debugstr_w(str) ); debug_relay_includelist = build_list( str ); } RtlInitUnicodeString( &name, RelayExcludeW ); if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count )) { TRACE( "RelayExclude = %s\n", debugstr_w(str) ); debug_relay_excludelist = build_list( str ); } RtlInitUnicodeString( &name, SnoopIncludeW ); if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count )) { TRACE_(snoop)( "SnoopInclude = %s\n", debugstr_w(str) ); debug_snoop_includelist = build_list( str ); } RtlInitUnicodeString( &name, SnoopExcludeW ); if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count )) { TRACE_(snoop)( "SnoopExclude = %s\n", debugstr_w(str) ); debug_snoop_excludelist = build_list( str ); } RtlInitUnicodeString( &name, RelayFromIncludeW ); if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count )) { TRACE("RelayFromInclude = %s\n", debugstr_w(str) ); debug_from_relay_includelist = build_list( str ); } RtlInitUnicodeString( &name, RelayFromExcludeW ); if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count )) { TRACE( "RelayFromExclude = %s\n", debugstr_w(str) ); debug_from_relay_excludelist = build_list( str ); } RtlInitUnicodeString( &name, SnoopFromIncludeW ); if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count )) { TRACE_(snoop)("SnoopFromInclude = %s\n", debugstr_w(str) ); debug_from_snoop_includelist = build_list( str ); } RtlInitUnicodeString( &name, SnoopFromExcludeW ); if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count )) { TRACE_(snoop)( "SnoopFromExclude = %s\n", debugstr_w(str) ); debug_from_snoop_excludelist = build_list( str ); } NtClose( hkey ); } #include "pshpack1.h" typedef struct { BYTE call; /* 0xe8 call callfrom32 (relative) */ DWORD callfrom32; /* RELAY_CallFrom32 relative addr */ BYTE ret; /* 0xc2 ret $n or 0xc3 ret */ WORD args; /* nb of args to remove from the stack */ void *orig; /* original entry point */ DWORD argtypes; /* argument types */ } DEBUG_ENTRY_POINT; typedef struct { /* code part */ BYTE lcall; /* 0xe8 call snoopentry (relative) */ /* NOTE: If you move snoopentry OR nrofargs fix the relative offset * calculation! */ DWORD snoopentry; /* SNOOP_Entry relative */ /* unreached */ int nrofargs; FARPROC origfun; const char *name; } SNOOP_FUN; typedef struct tagSNOOP_DLL { HMODULE hmod; SNOOP_FUN *funs; DWORD ordbase; DWORD nrofordinals; struct tagSNOOP_DLL *next; char name[1]; } SNOOP_DLL; typedef struct { /* code part */ BYTE lcall; /* 0xe8 call snoopret relative*/ /* NOTE: If you move snoopret OR origreturn fix the relative offset * calculation! */ DWORD snoopret; /* SNOOP_Ret relative */ /* unreached */ FARPROC origreturn; SNOOP_DLL *dll; DWORD ordinal; DWORD origESP; DWORD *args; /* saved args across a stdcall */ } SNOOP_RETURNENTRY; typedef struct tagSNOOP_RETURNENTRIES { SNOOP_RETURNENTRY entry[4092/sizeof(SNOOP_RETURNENTRY)]; struct tagSNOOP_RETURNENTRIES *next; } SNOOP_RETURNENTRIES; #include "poppack.h" extern void WINAPI SNOOP_Entry(void); extern void WINAPI SNOOP_Return(void); static SNOOP_DLL *firstdll; static SNOOP_RETURNENTRIES *firstrets; /*********************************************************************** * check_list * * Check if a given module and function is in the list. */ static BOOL check_list( const char *module, int ordinal, const char *func, const WCHAR **list ) { char ord_str[10]; sprintf( ord_str, "%d", ordinal ); for(; *list; list++) { const WCHAR *p = strrchrW( *list, '.' ); if (p && p > *list) /* check module and function */ { int len = p - *list; if (strncmpiAW( module, *list, len-1 ) || module[len]) continue; if (p[1] == '*' && !p[2]) return TRUE; if (!strcmpAW( ord_str, p + 1 )) return TRUE; if (func && !strcmpAW( func, p + 1 )) return TRUE; } else /* function only */ { if (func && !strcmpAW( func, *list )) return TRUE; } } return FALSE; } /*********************************************************************** * check_relay_include * * Check if a given function must be included in the relay output. */ static BOOL check_relay_include( const char *module, int ordinal, const char *func ) { if (debug_relay_excludelist && check_list( module, ordinal, func, debug_relay_excludelist )) return FALSE; if (debug_relay_includelist && !check_list( module, ordinal, func, debug_relay_includelist )) return FALSE; return TRUE; } /*********************************************************************** * check_from_module * * Check if calls from a given module must be included in the relay/snoop output, * given the exclusion and inclusion lists. */ static BOOL check_from_module( const WCHAR **includelist, const WCHAR **excludelist, const WCHAR *module ) { static const WCHAR dllW[] = {'.','d','l','l',0 }; const WCHAR **listitem; BOOL show; if (!module) return TRUE; if (!includelist && !excludelist) return TRUE; if (excludelist) { show = TRUE; listitem = excludelist; } else { show = FALSE; listitem = includelist; } for(; *listitem; listitem++) { int len; if (!strcmpiW( *listitem, module )) return !show; len = strlenW( *listitem ); if (!strncmpiW( *listitem, module, len ) && !strcmpiW( module + len, dllW )) return !show; } return show; } /*********************************************************************** * find_exported_name * * Find the name of an exported function. */ static const char *find_exported_name( HMODULE module, IMAGE_EXPORT_DIRECTORY *exp, int ordinal ) { unsigned int i; const char *ret = NULL; WORD *ordptr = (WORD *)((char *)module + exp->AddressOfNameOrdinals); for (i = 0; i < exp->NumberOfNames; i++, ordptr++) if (*ordptr + exp->Base == ordinal) break; if (i < exp->NumberOfNames) ret = (char *)module + ((DWORD*)((char *)module + exp->AddressOfNames))[i]; return ret; } /*********************************************************************** * get_entry_point * * Get the name of the DLL entry point corresponding to a relay address. */ static void get_entry_point( char *buffer, DEBUG_ENTRY_POINT *relay ) { IMAGE_EXPORT_DIRECTORY *exp = NULL; DEBUG_ENTRY_POINT *debug; char *p; const char *name; int ordinal = 0; PLIST_ENTRY mark, entry; PLDR_MODULE mod = NULL; DWORD size; /* First find the module */ mark = &NtCurrentTeb()->Peb->LdrData->InLoadOrderModuleList; for (entry = mark->Flink; entry != mark; entry = entry->Flink) { mod = CONTAINING_RECORD(entry, LDR_MODULE, InLoadOrderModuleList); if (!(mod->Flags & LDR_WINE_INTERNAL)) continue; exp = RtlImageDirectoryEntryToData( mod->BaseAddress, TRUE, IMAGE_DIRECTORY_ENTRY_EXPORT, &size ); if (!exp) continue; debug = (DEBUG_ENTRY_POINT *)((char *)exp + size); if (debug <= relay && relay < debug + exp->NumberOfFunctions) { ordinal = relay - debug; break; } } /* Now find the function */ strcpy( buffer, (char *)mod->BaseAddress + exp->Name ); p = buffer + strlen(buffer); if (p > buffer + 4 && !strcasecmp( p - 4, ".dll" )) p -= 4; if ((name = find_exported_name( mod->BaseAddress, exp, ordinal + exp->Base ))) sprintf( p, ".%s", name ); else sprintf( p, ".%ld", ordinal + exp->Base ); } /*********************************************************************** * RELAY_PrintArgs */ static inline void RELAY_PrintArgs( int *args, int nb_args, unsigned int typemask ) { while (nb_args--) { if ((typemask & 3) && HIWORD(*args)) { if (typemask & 2) DPRINTF( "%08x %s", *args, debugstr_w((LPWSTR)*args) ); else DPRINTF( "%08x %s", *args, debugstr_a((LPCSTR)*args) ); } else DPRINTF( "%08x", *args ); if (nb_args) DPRINTF( "," ); args++; typemask >>= 2; } } extern LONGLONG call_entry_point( void *func, int nb_args, const int *args ); __ASM_GLOBAL_FUNC( call_entry_point, "\tpushl %ebp\n" "\tmovl %esp,%ebp\n" "\tpushl %esi\n" "\tpushl %edi\n" "\tmovl 12(%ebp),%edx\n" "\tshll $2,%edx\n" "\tjz 1f\n" "\tsubl %edx,%esp\n" "\tandl $~15,%esp\n" "\tmovl 12(%ebp),%ecx\n" "\tmovl 16(%ebp),%esi\n" "\tmovl %esp,%edi\n" "\tcld\n" "\trep; movsl\n" "1:\tcall *8(%ebp)\n" "\tleal -8(%ebp),%esp\n" "\tpopl %edi\n" "\tpopl %esi\n" "\tpopl %ebp\n" "\tret" ); /*********************************************************************** * RELAY_CallFrom32 * * Stack layout on entry to this function: * ... ... * (esp+12) arg2 * (esp+8) arg1 * (esp+4) ret_addr * (esp) return addr to relay code */ static LONGLONG RELAY_CallFrom32( int ret_addr, ... ) { LONGLONG ret; char buffer[80]; int *args = &ret_addr + 1; /* Relay addr is the return address for this function */ BYTE *relay_addr = (BYTE *)__builtin_return_address(0); DEBUG_ENTRY_POINT *relay = (DEBUG_ENTRY_POINT *)(relay_addr - 5); WORD nb_args = relay->args / sizeof(int); if (TRACE_ON(relay)) { get_entry_point( buffer, relay ); DPRINTF( "%04lx:Call %s(", GetCurrentThreadId(), buffer ); RELAY_PrintArgs( args, nb_args, relay->argtypes ); DPRINTF( ") ret=%08x\n", ret_addr ); } ret = call_entry_point( relay->orig, nb_args, args ); if (TRACE_ON(relay)) { BOOL ret64 = (relay->argtypes & 0x80000000) && (nb_args < 16); if (ret64) DPRINTF( "%04lx:Ret %s() retval=%08x%08x ret=%08x\n", GetCurrentThreadId(), buffer, (UINT)(ret >> 32), (UINT)ret, ret_addr ); else DPRINTF( "%04lx:Ret %s() retval=%08x ret=%08x\n", GetCurrentThreadId(), buffer, (UINT)ret, ret_addr ); } return ret; } /*********************************************************************** * RELAY_CallFrom32Regs * * Stack layout (esp is context->Esp, not the current %esp): * * ... * (esp+4) first arg * (esp) return addr to caller * (esp-4) return addr to DEBUG_ENTRY_POINT * (esp-8) saved %eax * (esp-12) ptr to relay entry code for RELAY_CallFrom32Regs * ... >128 bytes space free to be modified (ensured by the assembly glue) */ void WINAPI __regs_RELAY_CallFrom32Regs( CONTEXT86 *context ) { char buffer[80]; int* args; int args_copy[17]; BYTE *entry_point; BYTE *relay_addr = *((BYTE **)context->Esp - 1); DEBUG_ENTRY_POINT *relay = (DEBUG_ENTRY_POINT *)(relay_addr - 5); WORD nb_args = relay->args / sizeof(int); /* remove extra stuff from the stack */ context->Eip = *(DWORD *)context->Esp; context->Esp += sizeof(DWORD); args = (int *)context->Esp; if (relay->ret == 0xc2) /* stdcall */ context->Esp += nb_args * sizeof(int); entry_point = (BYTE *)relay->orig; assert( entry_point[0] == 0x50 /* pushl %eax */ ); assert( entry_point[1] == 0xe8 /* call */ ); if (TRACE_ON(relay)) { get_entry_point( buffer, relay ); DPRINTF( "%04lx:Call %s(", GetCurrentThreadId(), buffer ); RELAY_PrintArgs( args, nb_args, relay->argtypes ); DPRINTF( ") ret=%08lx fs=%04lx\n", context->Eip, context->SegFs ); DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n", context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi ); DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx gs=%04lx flags=%08lx\n", context->Ebp, context->Esp, context->SegDs, context->SegEs, context->SegGs, context->EFlags ); } /* Now call the real function */ memcpy( args_copy, args, nb_args * sizeof(args[0]) ); args_copy[nb_args] = (int)context; /* append context argument */ call_entry_point( (entry_point + 6 + *(DWORD *)(entry_point + 6)), nb_args+1, args_copy ); if (TRACE_ON(relay)) { DPRINTF( "%04lx:Ret %s() retval=%08lx ret=%08lx fs=%04lx\n", GetCurrentThreadId(), buffer, context->Eax, context->Eip, context->SegFs ); DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n", context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi ); DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx gs=%04lx flags=%08lx\n", context->Ebp, context->Esp, context->SegDs, context->SegEs, context->SegGs, context->EFlags ); } } void WINAPI RELAY_CallFrom32Regs(void); DEFINE_REGS_ENTRYPOINT( RELAY_CallFrom32Regs, 0, 0 ); /* check whether the function at addr starts with a call to __wine_call_from_32_regs */ static BOOL is_register_entry_point( const BYTE *addr ) { extern void __wine_call_from_32_regs(); const int *offset; const void *ptr; if (addr[0] != 0x50) return FALSE; /* pushl %eax */ if (addr[1] != 0xe8) return FALSE; /* call */ /* check if call target is __wine_call_from_32_regs */ offset = (const int *)(addr + 2); if (*offset == (const char *)__wine_call_from_32_regs - (const char *)(offset + 1)) return TRUE; /* now check if call target is an import table jump to __wine_call_from_32_regs */ addr = (const BYTE *)(offset + 1) + *offset; /* Note: the following checks depend on the asm code generated by winebuild */ if (addr[0] == 0xff && addr[1] == 0x25) /* indirect jmp */ { ptr = *(const void * const*)(addr + 2); /* get indirect jmp target address */ } else /* check for import thunk */ { if (addr[0] != 0xe8) return FALSE; /* call get_pc_thunk */ if (addr[5] != 0xff || addr[6] != 0xa0) return FALSE; /* jmp *offset(%eax) */ ptr = addr + 5 + *(const int *)(addr + 7); } return (*(const char * const*)ptr == (char *)__wine_call_from_32_regs); } /*********************************************************************** * RELAY_GetProcAddress * * Return the proc address to use for a given function. */ FARPROC RELAY_GetProcAddress( HMODULE module, const IMAGE_EXPORT_DIRECTORY *exports, DWORD exp_size, FARPROC proc, const WCHAR *user ) { const DEBUG_ENTRY_POINT *debug = (DEBUG_ENTRY_POINT *)proc; const DEBUG_ENTRY_POINT *list = (const DEBUG_ENTRY_POINT *)((const char *)exports + exp_size); if (debug < list || debug >= list + exports->NumberOfFunctions) return proc; if (list + (debug - list) != debug) return proc; /* not a valid address */ if (check_from_module( debug_from_relay_includelist, debug_from_relay_excludelist, user )) return proc; /* we want to relay it */ if (!debug->call) return proc; /* not a normal function */ if (debug->call != 0xe8 && debug->call != 0xe9) return proc; /* not a debug thunk at all */ return debug->orig; } /*********************************************************************** * RELAY_SetupDLL * * Setup relay debugging for a built-in dll. */ void RELAY_SetupDLL( HMODULE module ) { IMAGE_EXPORT_DIRECTORY *exports; DEBUG_ENTRY_POINT *debug; DWORD *funcs; unsigned int i; const char *name; char *p, dllname[80]; DWORD size; if (!init_done) init_debug_lists(); exports = RtlImageDirectoryEntryToData( module, TRUE, IMAGE_DIRECTORY_ENTRY_EXPORT, &size ); if (!exports) return; debug = (DEBUG_ENTRY_POINT *)((char *)exports + size); funcs = (DWORD *)((char *)module + exports->AddressOfFunctions); strcpy( dllname, (char *)module + exports->Name ); p = dllname + strlen(dllname) - 4; if (p > dllname && !strcasecmp( p, ".dll" )) *p = 0; for (i = 0; i < exports->NumberOfFunctions; i++, funcs++, debug++) { int on = 1; if (!debug->call) continue; /* not a normal function */ if (debug->call != 0xe8 && debug->call != 0xe9) break; /* not a debug thunk at all */ name = find_exported_name( module, exports, i + exports->Base ); on = check_relay_include( dllname, i + exports->Base, name ); if (on) { debug->call = 0xe8; /* call relative */ if (is_register_entry_point( debug->orig )) debug->callfrom32 = (char *)RELAY_CallFrom32Regs - (char *)&debug->ret; else debug->callfrom32 = (char *)RELAY_CallFrom32 - (char *)&debug->ret; } else { debug->call = 0xe9; /* jmp relative */ debug->callfrom32 = (char *)debug->orig - (char *)&debug->ret; } *funcs = (char *)debug - (char *)module; } } /*********************************************************************** * SNOOP_ShowDebugmsgSnoop * * Simple function to decide if a particular debugging message is * wanted. */ static BOOL SNOOP_ShowDebugmsgSnoop(const char *module, int ordinal, const char *func) { if (debug_snoop_excludelist && check_list( module, ordinal, func, debug_snoop_excludelist )) return FALSE; if (debug_snoop_includelist && !check_list( module, ordinal, func, debug_snoop_includelist )) return FALSE; return TRUE; } /*********************************************************************** * SNOOP_SetupDLL * * Setup snoop debugging for a native dll. */ void SNOOP_SetupDLL(HMODULE hmod) { SNOOP_DLL **dll = &firstdll; char *p, *name; void *addr; SIZE_T size; IMAGE_EXPORT_DIRECTORY *exports; if (!init_done) init_debug_lists(); exports = RtlImageDirectoryEntryToData( hmod, TRUE, IMAGE_DIRECTORY_ENTRY_EXPORT, &size ); if (!exports) return; name = (char *)hmod + exports->Name; TRACE_(snoop)("hmod=%p, name=%s\n", hmod, name); while (*dll) { if ((*dll)->hmod == hmod) { /* another dll, loaded at the same address */ addr = (*dll)->funs; size = (*dll)->nrofordinals * sizeof(SNOOP_FUN); NtFreeVirtualMemory(NtCurrentProcess(), &addr, &size, MEM_RELEASE); break; } dll = &((*dll)->next); } if (*dll) *dll = RtlReAllocateHeap(GetProcessHeap(), HEAP_ZERO_MEMORY, *dll, sizeof(SNOOP_DLL) + strlen(name)); else *dll = RtlAllocateHeap(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SNOOP_DLL) + strlen(name)); (*dll)->hmod = hmod; (*dll)->ordbase = exports->Base; (*dll)->nrofordinals = exports->NumberOfFunctions; strcpy( (*dll)->name, name ); p = (*dll)->name + strlen((*dll)->name) - 4; if (p > (*dll)->name && !strcasecmp( p, ".dll" )) *p = 0; size = exports->NumberOfFunctions * sizeof(SNOOP_FUN); addr = NULL; NtAllocateVirtualMemory(NtCurrentProcess(), &addr, 0, &size, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE); if (!addr) { RtlFreeHeap(GetProcessHeap(),0,*dll); FIXME("out of memory\n"); return; } (*dll)->funs = addr; memset((*dll)->funs,0,size); } /*********************************************************************** * SNOOP_GetProcAddress * * Return the proc address to use for a given function. */ FARPROC SNOOP_GetProcAddress( HMODULE hmod, const IMAGE_EXPORT_DIRECTORY *exports, DWORD exp_size, FARPROC origfun, DWORD ordinal, const WCHAR *user) { unsigned int i; const char *ename; const WORD *ordinals; const DWORD *names; SNOOP_DLL *dll = firstdll; SNOOP_FUN *fun; const IMAGE_SECTION_HEADER *sec; if (!TRACE_ON(snoop)) return origfun; if (!check_from_module( debug_from_snoop_includelist, debug_from_snoop_excludelist, user )) return origfun; /* the calling module was explicitly excluded */ if (!*(LPBYTE)origfun) /* 0x00 is an imposs. opcode, poss. dataref. */ return origfun; sec = RtlImageRvaToSection( RtlImageNtHeader(hmod), hmod, (char *)origfun - (char *)hmod ); if (!sec || !(sec->Characteristics & IMAGE_SCN_CNT_CODE)) return origfun; /* most likely a data reference */ while (dll) { if (hmod == dll->hmod) break; dll = dll->next; } if (!dll) /* probably internal */ return origfun; /* try to find a name for it */ ename = NULL; names = (const DWORD *)((const char *)hmod + exports->AddressOfNames); ordinals = (const WORD *)((const char *)hmod + exports->AddressOfNameOrdinals); if (names) for (i = 0; i < exports->NumberOfNames; i++) { if (ordinals[i] == ordinal) { ename = (const char *)hmod + names[i]; break; } } if (!SNOOP_ShowDebugmsgSnoop(dll->name,ordinal,ename)) return origfun; assert(ordinal < dll->nrofordinals); fun = dll->funs + ordinal; if (!fun->name) { fun->name = ename; fun->lcall = 0xe8; /* NOTE: origreturn struct member MUST come directly after snoopentry */ fun->snoopentry = (char*)SNOOP_Entry-((char*)(&fun->nrofargs)); fun->origfun = origfun; fun->nrofargs = -1; } return (FARPROC)&(fun->lcall); } static void SNOOP_PrintArg(DWORD x) { int i,nostring; DPRINTF("%08lx",x); if (!HIWORD(x) || TRACE_ON(seh)) return; /* trivial reject to avoid faults */ __TRY { LPBYTE s=(LPBYTE)x; i=0;nostring=0; while (i<80) { if (s[i]==0) break; if (s[i]<0x20) {nostring=1;break;} if (s[i]>=0x80) {nostring=1;break;} i++; } if (!nostring && i > 5) DPRINTF(" %s",debugstr_an((LPSTR)x,i)); else /* try unicode */ { LPWSTR s=(LPWSTR)x; i=0;nostring=0; while (i<80) { if (s[i]==0) break; if (s[i]<0x20) {nostring=1;break;} if (s[i]>0x100) {nostring=1;break;} i++; } if (!nostring && i > 5) DPRINTF(" %s",debugstr_wn((LPWSTR)x,i)); } } __EXCEPT_PAGE_FAULT { } __ENDTRY } #define CALLER1REF (*(DWORD*)context->Esp) void WINAPI __regs_SNOOP_Entry( CONTEXT86 *context ) { DWORD ordinal=0,entry = context->Eip - 5; SNOOP_DLL *dll = firstdll; SNOOP_FUN *fun = NULL; SNOOP_RETURNENTRIES **rets = &firstrets; SNOOP_RETURNENTRY *ret; int i=0, max; while (dll) { if ( ((char*)entry>=(char*)dll->funs) && ((char*)entry<=(char*)(dll->funs+dll->nrofordinals)) ) { fun = (SNOOP_FUN*)entry; ordinal = fun-dll->funs; break; } dll=dll->next; } if (!dll) { FIXME("entrypoint 0x%08lx not found\n",entry); return; /* oops */ } /* guess cdecl ... */ if (fun->nrofargs<0) { /* Typical cdecl return frame is: * add esp, xxxxxxxx * which has (for xxxxxxxx up to 255 the opcode "83 C4 xx". * (after that 81 C2 xx xx xx xx) */ LPBYTE reteip = (LPBYTE)CALLER1REF; if (reteip) { if ((reteip[0]==0x83)&&(reteip[1]==0xc4)) fun->nrofargs=reteip[2]/4; } } while (*rets) { for (i=0;ientry)/sizeof((*rets)->entry[0]);i++) if (!(*rets)->entry[i].origreturn) break; if (i!=sizeof((*rets)->entry)/sizeof((*rets)->entry[0])) break; rets = &((*rets)->next); } if (!*rets) { SIZE_T size = 4096; VOID* addr = NULL; NtAllocateVirtualMemory(NtCurrentProcess(), &addr, 0, &size, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE); if (!addr) return; *rets = addr; memset(*rets,0,4096); i = 0; /* entry 0 is free */ } ret = &((*rets)->entry[i]); ret->lcall = 0xe8; /* NOTE: origreturn struct member MUST come directly after snoopret */ ret->snoopret = ((char*)SNOOP_Return)-(char*)(&ret->origreturn); ret->origreturn = (FARPROC)CALLER1REF; CALLER1REF = (DWORD)&ret->lcall; ret->dll = dll; ret->args = NULL; ret->ordinal = ordinal; ret->origESP = context->Esp; context->Eip = (DWORD)fun->origfun; if (fun->name) DPRINTF("%04lx:CALL %s.%s(",GetCurrentThreadId(),dll->name,fun->name); else DPRINTF("%04lx:CALL %s.%ld(",GetCurrentThreadId(),dll->name,dll->ordbase+ordinal); if (fun->nrofargs>0) { max = fun->nrofargs; if (max>16) max=16; for (i=0;iEsp + 4 + sizeof(DWORD)*i)); if (inrofargs-1) DPRINTF(","); } if (max!=fun->nrofargs) DPRINTF(" ..."); } else if (fun->nrofargs<0) { DPRINTF(""); ret->args = RtlAllocateHeap(GetProcessHeap(), 0,16*sizeof(DWORD)); memcpy(ret->args,(LPBYTE)(context->Esp + 4),sizeof(DWORD)*16); } DPRINTF(") ret=%08lx\n",(DWORD)ret->origreturn); } void WINAPI __regs_SNOOP_Return( CONTEXT86 *context ) { SNOOP_RETURNENTRY *ret = (SNOOP_RETURNENTRY*)(context->Eip - 5); SNOOP_FUN *fun = &ret->dll->funs[ret->ordinal]; /* We haven't found out the nrofargs yet. If we called a cdecl * function it is too late anyway and we can just set '0' (which * will be the difference between orig and current ESP * If stdcall -> everything ok. */ if (ret->dll->funs[ret->ordinal].nrofargs<0) ret->dll->funs[ret->ordinal].nrofargs=(context->Esp - ret->origESP-4)/4; context->Eip = (DWORD)ret->origreturn; if (ret->args) { int i,max; if (fun->name) DPRINTF("%04lx:RET %s.%s(", GetCurrentThreadId(), ret->dll->name, fun->name); else DPRINTF("%04lx:RET %s.%ld(", GetCurrentThreadId(), ret->dll->name,ret->dll->ordbase+ret->ordinal); max = fun->nrofargs; if (max>16) max=16; for (i=0;iargs[i]); if (iEax,(DWORD)ret->origreturn ); RtlFreeHeap(GetProcessHeap(),0,ret->args); ret->args = NULL; } else { if (fun->name) DPRINTF("%04lx:RET %s.%s() retval=%08lx ret=%08lx\n", GetCurrentThreadId(), ret->dll->name, fun->name, context->Eax, (DWORD)ret->origreturn); else DPRINTF("%04lx:RET %s.%ld() retval=%08lx ret=%08lx\n", GetCurrentThreadId(), ret->dll->name,ret->dll->ordbase+ret->ordinal, context->Eax, (DWORD)ret->origreturn); } ret->origreturn = NULL; /* mark as empty */ } /* assembly wrappers that save the context */ DEFINE_REGS_ENTRYPOINT( SNOOP_Entry, 0, 0 ); DEFINE_REGS_ENTRYPOINT( SNOOP_Return, 0, 0 ); #else /* __i386__ */ FARPROC RELAY_GetProcAddress( HMODULE module, const IMAGE_EXPORT_DIRECTORY *exports, DWORD exp_size, FARPROC proc, const WCHAR *user ) { return proc; } FARPROC SNOOP_GetProcAddress( HMODULE hmod, const IMAGE_EXPORT_DIRECTORY *exports, DWORD exp_size, FARPROC origfun, DWORD ordinal, const WCHAR *user ) { return origfun; } void RELAY_SetupDLL( HMODULE module ) { } void SNOOP_SetupDLL( HMODULE hmod ) { FIXME("snooping works only on i386 for now.\n"); } #endif /* __i386__ */