/* * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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); #ifdef __i386__ WINE_DECLARE_DEBUG_CHANNEL(snoop); WINE_DECLARE_DEBUG_CHANNEL(seh); struct relay_descr /* descriptor for a module */ { void *magic; /* signature */ void *relay_from_32; /* functions to call from relay thunks */ void *relay_from_32_regs; void *private; /* reserved for the relay code private data */ const char *entry_point_base; /* base address of entry point thunks */ const unsigned int *entry_point_offsets; /* offsets of entry points thunks */ const unsigned int *arg_types; /* table of argument types for all entry points */ }; #define RELAY_DESCR_MAGIC ((void *)0xdeb90001) /* private data built at dll load time */ struct relay_entry_point { void *orig_func; /* original entry point function */ const char *name; /* function name (if any) */ }; struct relay_private_data { HMODULE module; /* module handle of this dll */ unsigned int base; /* ordinal base */ char dllname[40]; /* dll name (without .dll extension) */ struct relay_entry_point entry_points[1]; /* list of dll entry points */ }; 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 ); } /*********************************************************************** * 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; } /*********************************************************************** * 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_call_from_32 * * stack points to the return address, i.e. the first argument is stack[1]. */ static LONGLONG WINAPI relay_call_from_32( struct relay_descr *descr, unsigned int idx, int *stack ) { LONGLONG ret; WORD ordinal = LOWORD(idx); BYTE nb_args = LOBYTE(HIWORD(idx)); BYTE flags = HIBYTE(HIWORD(idx)); struct relay_private_data *data = descr->private; struct relay_entry_point *entry_point = data->entry_points + ordinal; if (!TRACE_ON(relay)) ret = call_entry_point( entry_point->orig_func, nb_args, stack + 1 ); else { if (entry_point->name) DPRINTF( "%04x:Call %s.%s(", GetCurrentThreadId(), data->dllname, entry_point->name ); else DPRINTF( "%04x:Call %s.%u(", GetCurrentThreadId(), data->dllname, data->base + ordinal ); RELAY_PrintArgs( stack + 1, nb_args, descr->arg_types[ordinal] ); DPRINTF( ") ret=%08x\n", stack[0] ); ret = call_entry_point( entry_point->orig_func, nb_args, stack + 1 ); if (entry_point->name) DPRINTF( "%04x:Ret %s.%s()", GetCurrentThreadId(), data->dllname, entry_point->name ); else DPRINTF( "%04x:Ret %s.%u()", GetCurrentThreadId(), data->dllname, data->base + ordinal ); if (flags & 1) /* 64-bit return value */ DPRINTF( " retval=%08x%08x ret=%08x\n", (UINT)(ret >> 32), (UINT)ret, stack[0] ); else DPRINTF( " retval=%08x ret=%08x\n", (UINT)ret, stack[0] ); } return ret; } /*********************************************************************** * relay_call_from_32_regs */ void WINAPI __regs_relay_call_from_32_regs( struct relay_descr *descr, unsigned int idx, unsigned int orig_eax, unsigned int ret_addr, CONTEXT86 *context ) { WORD ordinal = LOWORD(idx); BYTE nb_args = LOBYTE(HIWORD(idx)); BYTE flags = HIBYTE(HIWORD(idx)); struct relay_private_data *data = descr->private; struct relay_entry_point *entry_point = data->entry_points + ordinal; BYTE *orig_func = entry_point->orig_func; int *args = (int *)context->Esp; int args_copy[32]; /* restore the context to what it was before the relay thunk */ context->Eax = orig_eax; context->Eip = ret_addr; if (flags & 2) /* stdcall */ context->Esp += nb_args * sizeof(int); if (TRACE_ON(relay)) { if (entry_point->name) DPRINTF( "%04x:Call %s.%s(", GetCurrentThreadId(), data->dllname, entry_point->name ); else DPRINTF( "%04x:Call %s.%u(", GetCurrentThreadId(), data->dllname, data->base + ordinal ); RELAY_PrintArgs( args, nb_args, descr->arg_types[ordinal] ); DPRINTF( ") ret=%08x\n", ret_addr ); DPRINTF( "%04x: eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x " "ebp=%08x esp=%08x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n", GetCurrentThreadId(), context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi, context->Ebp, context->Esp, context->SegDs, context->SegEs, context->SegFs, context->SegGs, context->EFlags ); assert( orig_func[0] == 0x50 /* pushl %eax */ ); assert( orig_func[1] == 0xe8 /* call */ ); } /* 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( orig_func + 6 + *(int *)(orig_func + 6), nb_args, args_copy ); if (TRACE_ON(relay)) { if (entry_point->name) DPRINTF( "%04x:Ret %s.%s() retval=%08x ret=%08x\n", GetCurrentThreadId(), data->dllname, entry_point->name, context->Eax, context->Eip ); else DPRINTF( "%04x:Ret %s.%u() retval=%08x ret=%08x\n", GetCurrentThreadId(), data->dllname, data->base + ordinal, context->Eax, context->Eip ); DPRINTF( "%04x: eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x " "ebp=%08x esp=%08x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n", GetCurrentThreadId(), context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi, context->Ebp, context->Esp, context->SegDs, context->SegEs, context->SegFs, context->SegGs, context->EFlags ); } } extern void WINAPI relay_call_from_32_regs(void); DEFINE_REGS_ENTRYPOINT( relay_call_from_32_regs, 16, 16 ); /*********************************************************************** * 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, DWORD ordinal, const WCHAR *user ) { struct relay_private_data *data; const struct relay_descr *descr = (const struct relay_descr *)((const char *)exports + exp_size); if (descr->magic != RELAY_DESCR_MAGIC || !(data = descr->private)) return proc; /* no relay data */ if (!data->entry_points[ordinal].orig_func) return proc; /* not a relayed function */ if (check_from_module( debug_from_relay_includelist, debug_from_relay_excludelist, user )) return proc; /* we want to relay it */ return data->entry_points[ordinal].orig_func; } /*********************************************************************** * RELAY_SetupDLL * * Setup relay debugging for a built-in dll. */ void RELAY_SetupDLL( HMODULE module ) { IMAGE_EXPORT_DIRECTORY *exports; DWORD *funcs; unsigned int i, len; DWORD size, entry_point_rva; struct relay_descr *descr; struct relay_private_data *data; const WORD *ordptr; if (!init_done) init_debug_lists(); exports = RtlImageDirectoryEntryToData( module, TRUE, IMAGE_DIRECTORY_ENTRY_EXPORT, &size ); if (!exports) return; descr = (struct relay_descr *)((char *)exports + size); if (descr->magic != RELAY_DESCR_MAGIC) return; if (!(data = RtlAllocateHeap( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*data) + (exports->NumberOfFunctions-1) * sizeof(data->entry_points) ))) return; descr->relay_from_32 = relay_call_from_32; descr->relay_from_32_regs = relay_call_from_32_regs; descr->private = data; data->module = module; data->base = exports->Base; len = strlen( (char *)module + exports->Name ); if (len > 4 && !strcasecmp( (char *)module + exports->Name + len - 4, ".dll" )) len -= 4; len = min( len, sizeof(data->dllname) - 1 ); memcpy( data->dllname, (char *)module + exports->Name, len ); data->dllname[len] = 0; /* fetch name pointer for all entry points and store them in the private structure */ ordptr = (const WORD *)((char *)module + exports->AddressOfNameOrdinals); for (i = 0; i < exports->NumberOfNames; i++, ordptr++) { DWORD name_rva = ((DWORD*)((char *)module + exports->AddressOfNames))[i]; data->entry_points[*ordptr].name = (const char *)module + name_rva; } /* patch the functions in the export table to point to the relay thunks */ funcs = (DWORD *)((char *)module + exports->AddressOfFunctions); entry_point_rva = (const char *)descr->entry_point_base - (const char *)module; for (i = 0; i < exports->NumberOfFunctions; i++, funcs++) { if (!descr->entry_point_offsets[i]) continue; /* not a normal function */ if (!check_relay_include( data->dllname, i + exports->Base, data->entry_points[i].name )) continue; /* don't include this entry point */ data->entry_points[i].orig_func = (char *)module + *funcs; *funcs = entry_point_rva + descr->entry_point_offsets[i]; } } /***********************************************************************/ /* snoop support */ /***********************************************************************/ #include "pshpack1.h" 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; /*********************************************************************** * 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; ULONG size32; IMAGE_EXPORT_DIRECTORY *exports; if (!init_done) init_debug_lists(); exports = RtlImageDirectoryEntryToData( hmod, TRUE, IMAGE_DIRECTORY_ENTRY_EXPORT, &size32 ); if (!exports) return; name = (char *)hmod + exports->Name; size = size32; 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("%08x",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%08x 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("%04x:CALL %s.%s(",GetCurrentThreadId(),dll->name,fun->name); else DPRINTF("%04x:CALL %s.%d(",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=%08x\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("%04x:RET %s.%s(", GetCurrentThreadId(), ret->dll->name, fun->name); else DPRINTF("%04x:RET %s.%d(", 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("%04x:RET %s.%s() retval=%08x ret=%08x\n", GetCurrentThreadId(), ret->dll->name, fun->name, context->Eax, (DWORD)ret->origreturn); else DPRINTF("%04x:RET %s.%d() retval=%08x ret=%08x\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, DWORD ordinal, 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__ */