relay32/relay386.c

   1 /*
   2  * 386-specific Win32 relay functions
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  */
   6
   7
   8 #include <assert.h>
   9 #include <string.h>
  10 #include <stdio.h>
  11
  12 #include "config.h"
  13 #include "winnt.h"
  14 #include "selectors.h"
  15 #include "stackframe.h"
  16 #include "syslevel.h"
  17 #include "main.h"
  18 #include "module.h"
  19 #include "debugtools.h"
  20
  21 DEFAULT_DEBUG_CHANNEL(relay);
  22
  23 char **debug_relay_excludelist = NULL, **debug_relay_includelist = NULL;
  24
  25 /***********************************************************************
  26  *           RELAY_ShowDebugmsgRelay
  27  *
  28  * Simple function to decide if a particular debugging message is
  29  * wanted.  Called from RELAY_CallFrom32 and from in if1632/relay.c
  30  */
  31 int RELAY_ShowDebugmsgRelay(const char *func) {
  32
  33   if(debug_relay_excludelist || debug_relay_includelist) {
  34     const char *term = strchr(func, ':');
  35     char **listitem;
  36     int len, len2, itemlen, show;
  37
  38     if(debug_relay_excludelist) {
  39       show = 1;
  40       listitem = debug_relay_excludelist;
  41     } else {
  42       show = 0;
  43       listitem = debug_relay_includelist;
  44     }
  45     assert(term);
  46     assert(strlen(term) > 2);
  47     len = term - func;
  48     len2 = strchr(func, '.') - func;
  49     assert(len2 && len2 > 0 && len2 < 64);
  50     term += 2;
  51     for(; *listitem; listitem++) {
  52       itemlen = strlen(*listitem);
  53       if((itemlen == len && !strncasecmp(*listitem, func, len)) ||
  54          (itemlen == len2 && !strncasecmp(*listitem, func, len2)) ||
  55          !strcasecmp(*listitem, term)) {
  56         show = !show;
  57        break;
  58       }
  59     }
  60     return show;
  61   }
  62   return 1;
  63 }
  64
  65
  66 #ifdef __i386__
  67
  68 typedef struct
  69 {
  70     BYTE          call;                    /* 0xe8 call callfrom32 (relative) */
  71     DWORD         callfrom32 WINE_PACKED;  /* RELAY_CallFrom32 relative addr */
  72     BYTE          ret;                     /* 0xc2 ret $n  or  0xc3 ret */
  73     WORD          args;                    /* nb of args to remove from the stack */
  74     void         *orig;                    /* original entry point */
  75     DWORD         argtypes;                /* argument types */
  76 } DEBUG_ENTRY_POINT;
  77
  78
  79 /***********************************************************************
  80  *           find_exported_name
  81  *
  82  * Find the name of an exported function.
  83  */
  84 static const char *find_exported_name( const char *module,
  85                                        IMAGE_EXPORT_DIRECTORY *exp, int ordinal )
  86 {
  87     int i;
  88     const char *ret = NULL;
  89
  90     WORD *ordptr = (WORD *)(module + exp->AddressOfNameOrdinals);
  91     for (i = 0; i < exp->NumberOfNames; i++, ordptr++)
  92         if (*ordptr + exp->Base == ordinal) break;
  93     if (i < exp->NumberOfNames)
  94         ret = module + ((DWORD*)(module + exp->AddressOfNames))[i];
  95     return ret;
  96 }
  97
  98
  99 /***********************************************************************
 100  *           get_entry_point
 101  *
 102  * Get the name of the DLL entry point corresponding to a relay address.
 103  */
 104 static void get_entry_point( char *buffer, DEBUG_ENTRY_POINT *relay )
 105 {
 106     IMAGE_DATA_DIRECTORY *dir;
 107     IMAGE_EXPORT_DIRECTORY *exp = NULL;
 108     DEBUG_ENTRY_POINT *debug;
 109     char *base = NULL;
 110     const char *name;
 111     int ordinal = 0;
 112     WINE_MODREF *wm;
 113
 114     /* First find the module */
 115
 116     for (wm = MODULE_modref_list; wm; wm = wm->next)
 117     {
 118         if (!(wm->flags & WINE_MODREF_INTERNAL)) continue;
 119         base = (char *)wm->module;
 120         dir = &PE_HEADER(base)->OptionalHeader.DataDirectory[IMAGE_FILE_EXPORT_DIRECTORY];
 121         if (!dir->Size) continue;
 122         exp = (IMAGE_EXPORT_DIRECTORY *)(base + dir->VirtualAddress);
 123         debug = (DEBUG_ENTRY_POINT *)((char *)exp + dir->Size);
 124         if (debug <= relay && relay < debug + exp->NumberOfFunctions)
 125         {
 126             ordinal = relay - debug;
 127             break;
 128         }
 129     }
 130
 131     /* Now find the function */
 132
 133     name = find_exported_name( base, exp, ordinal + exp->Base );
 134     sprintf( buffer, "%s.%ld: %s", base + exp->Name, ordinal + exp->Base, name ? name : "@" );
 135 }
 136
 137
 138 /***********************************************************************
 139  *           RELAY_PrintArgs
 140  */
 141 static inline void RELAY_PrintArgs( int *args, int nb_args, unsigned int typemask )
 142 {
 143     while (nb_args--)
 144     {
 145         if ((typemask & 3) && HIWORD(*args))
 146         {
 147             if (typemask & 2)
 148                 DPRINTF( "%08x %s", *args, debugstr_w((LPWSTR)*args) );
 149             else
 150                 DPRINTF( "%08x %s", *args, debugstr_a((LPCSTR)*args) );
 151         }
 152         else DPRINTF( "%08x", *args );
 153         if (nb_args) DPRINTF( "," );
 154         args++;
 155         typemask >>= 2;
 156     }
 157 }
 158
 159
 160 typedef LONGLONG WINAPI (*LONGLONG_FARPROC)();
 161
 162 /***********************************************************************
 163  *           RELAY_CallFrom32
 164  *
 165  * Stack layout on entry to this function:
 166  *  ...      ...
 167  * (esp+12)  arg2
 168  * (esp+8)   arg1
 169  * (esp+4)   ret_addr
 170  * (esp)     return addr to relay code
 171  */
 172 static LONGLONG RELAY_CallFrom32( int ret_addr, ... )
 173 {
 174     LONGLONG ret;
 175     char buffer[80];
 176     BOOL ret64;
 177
 178     int *args = &ret_addr + 1;
 179     /* Relay addr is the return address for this function */
 180     BYTE *relay_addr = (BYTE *)__builtin_return_address(0);
 181     DEBUG_ENTRY_POINT *relay = (DEBUG_ENTRY_POINT *)(relay_addr - 5);
 182     WORD nb_args = relay->args / sizeof(int);
 183
 184     get_entry_point( buffer, relay );
 185
 186     DPRINTF( "Call %s(", buffer );
 187     RELAY_PrintArgs( args, nb_args, relay->argtypes );
 188     DPRINTF( ") ret=%08x fs=%04x\n", ret_addr, __get_fs() );
 189     ret64 = (relay->argtypes & 0x80000000) && (nb_args < 16);
 190
 191     /* the user driver functions may be called with the window lock held */
 192     if (memcmp( buffer, "x11drv.", 7 ) && memcmp( buffer, "ttydrv.", 7 ))
 193       SYSLEVEL_CheckNotLevel( 2 );
 194
 195     if (relay->ret == 0xc3) /* cdecl */
 196     {
 197         LONGLONG (*cfunc)() = relay->orig;
 198         switch(nb_args)
 199         {
 200         case 0: ret = cfunc(); break;
 201         case 1: ret = cfunc(args[0]); break;
 202         case 2: ret = cfunc(args[0],args[1]); break;
 203         case 3: ret = cfunc(args[0],args[1],args[2]); break;
 204         case 4: ret = cfunc(args[0],args[1],args[2],args[3]); break;
 205         case 5: ret = cfunc(args[0],args[1],args[2],args[3],args[4]); break;
 206         case 6: ret = cfunc(args[0],args[1],args[2],args[3],args[4],
 207                             args[5]); break;
 208         case 7: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 209                             args[6]); break;
 210         case 8: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 211                             args[6],args[7]); break;
 212         case 9: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 213                             args[6],args[7],args[8]); break;
 214         case 10: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 215                              args[6],args[7],args[8],args[9]); break;
 216         case 11: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 217                              args[6],args[7],args[8],args[9],args[10]); break;
 218         case 12: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 219                              args[6],args[7],args[8],args[9],args[10],
 220                              args[11]); break;
 221         case 13: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 222                              args[6],args[7],args[8],args[9],args[10],args[11],
 223                              args[12]); break;
 224         case 14: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 225                              args[6],args[7],args[8],args[9],args[10],args[11],
 226                              args[12],args[13]); break;
 227         case 15: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 228                              args[6],args[7],args[8],args[9],args[10],args[11],
 229                              args[12],args[13],args[14]); break;
 230         case 16: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 231                              args[6],args[7],args[8],args[9],args[10],args[11],
 232                              args[12],args[13],args[14],args[15]); break;
 233         default:
 234             ERR( "Unsupported nb of args %d\n", nb_args );
 235             assert(FALSE);
 236         }
 237     }
 238     else  /* stdcall */
 239     {
 240         LONGLONG_FARPROC func = relay->orig;
 241         switch(nb_args)
 242         {
 243         case 0: ret = func(); break;
 244         case 1: ret = func(args[0]); break;
 245         case 2: ret = func(args[0],args[1]); break;
 246         case 3: ret = func(args[0],args[1],args[2]); break;
 247         case 4: ret = func(args[0],args[1],args[2],args[3]); break;
 248         case 5: ret = func(args[0],args[1],args[2],args[3],args[4]); break;
 249         case 6: ret = func(args[0],args[1],args[2],args[3],args[4],
 250                            args[5]); break;
 251         case 7: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 252                            args[6]); break;
 253         case 8: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 254                            args[6],args[7]); break;
 255         case 9: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 256                            args[6],args[7],args[8]); break;
 257         case 10: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 258                             args[6],args[7],args[8],args[9]); break;
 259         case 11: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 260                             args[6],args[7],args[8],args[9],args[10]); break;
 261         case 12: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 262                             args[6],args[7],args[8],args[9],args[10],
 263                             args[11]); break;
 264         case 13: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 265                             args[6],args[7],args[8],args[9],args[10],args[11],
 266                             args[12]); break;
 267         case 14: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 268                             args[6],args[7],args[8],args[9],args[10],args[11],
 269                             args[12],args[13]); break;
 270         case 15: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 271                             args[6],args[7],args[8],args[9],args[10],args[11],
 272                             args[12],args[13],args[14]); break;
 273         case 16: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 274                             args[6],args[7],args[8],args[9],args[10],args[11],
 275                             args[12],args[13],args[14],args[15]); break;
 276         default:
 277             ERR( "Unsupported nb of args %d\n", nb_args );
 278             assert(FALSE);
 279         }
 280     }
 281     if (ret64)
 282         DPRINTF( "Ret  %s() retval=%08x%08x ret=%08x fs=%04x\n",
 283                  buffer, (UINT)(ret >> 32), (UINT)ret, ret_addr, __get_fs() );
 284     else
 285         DPRINTF( "Ret  %s() retval=%08x ret=%08x fs=%04x\n",
 286                  buffer, (UINT)ret, ret_addr, __get_fs() );
 287
 288     if (memcmp( buffer, "x11drv.", 7 ) && memcmp( buffer, "ttydrv.", 7 ))
 289       SYSLEVEL_CheckNotLevel( 2 );
 290
 291     return ret;
 292 }
 293
 294
 295 /***********************************************************************
 296  *           RELAY_CallFrom32Regs
 297  *
 298  * Stack layout (esp is context->Esp, not the current %esp):
 299  *
 300  * ...
 301  * (esp+4) first arg
 302  * (esp)   return addr to caller
 303  * (esp-4) return addr to DEBUG_ENTRY_POINT
 304  * (esp-8) ptr to relay entry code for RELAY_CallFrom32Regs
 305  *  ...    >128 bytes space free to be modified (ensured by the assembly glue)
 306  */
 307
 308 void WINAPI RELAY_DoCallFrom32Regs( CONTEXT86 *context );
 309 DEFINE_REGS_ENTRYPOINT_0( RELAY_CallFrom32Regs, RELAY_DoCallFrom32Regs )
 310 void WINAPI RELAY_DoCallFrom32Regs( CONTEXT86 *context )
 311 {
 312     char buffer[80];
 313     int* args;
 314     FARPROC func;
 315     BYTE *entry_point;
 316
 317     BYTE *relay_addr = *((BYTE **)context->Esp - 1);
 318     DEBUG_ENTRY_POINT *relay = (DEBUG_ENTRY_POINT *)(relay_addr - 5);
 319     WORD nb_args = (relay->args & ~0x8000) / sizeof(int);
 320
 321     /* remove extra stuff from the stack */
 322     context->Eip = stack32_pop(context);
 323     args = (int *)context->Esp;
 324     context->Esp += 4 * nb_args;
 325
 326     assert(TRACE_ON(relay));
 327
 328     entry_point = (BYTE *)relay->orig;
 329     assert( *entry_point == 0xe8 /* lcall */ );
 330     func = *(FARPROC *)(entry_point + 5);
 331
 332     get_entry_point( buffer, relay );
 333
 334     DPRINTF( "Call %s(", buffer );
 335     RELAY_PrintArgs( args, nb_args, relay->argtypes );
 336     DPRINTF( ") ret=%08lx fs=%04lx\n", context->Eip, context->SegFs );
 337
 338     DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
 339             context->Eax, context->Ebx, context->Ecx,
 340             context->Edx, context->Esi, context->Edi );
 341     DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx gs=%04lx flags=%08lx\n",
 342             context->Ebp, context->Esp, context->SegDs,
 343             context->SegEs, context->SegGs, context->EFlags );
 344
 345     SYSLEVEL_CheckNotLevel( 2 );
 346
 347     /* Now call the real function */
 348     switch(nb_args)
 349     {
 350     case 0: func(context); break;
 351     case 1: func(args[0],context); break;
 352     case 2: func(args[0],args[1],context); break;
 353     case 3: func(args[0],args[1],args[2],context); break;
 354     case 4: func(args[0],args[1],args[2],args[3],context); break;
 355     case 5: func(args[0],args[1],args[2],args[3],args[4],context); break;
 356     case 6: func(args[0],args[1],args[2],args[3],args[4],args[5],context); break;
 357     case 7: func(args[0],args[1],args[2],args[3],args[4],args[5],args[6],context); break;
 358     case 8: func(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],context); break;
 359     case 9: func(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],
 360                  context); break;
 361     case 10: func(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],
 362                   args[9],context); break;
 363     case 11: func(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],
 364                   args[9],args[10],context); break;
 365     case 12: func(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],
 366                   args[9],args[10],args[11],context); break;
 367     case 13: func(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],
 368                   args[9],args[10],args[11],args[12],context); break;
 369     case 14: func(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],
 370                   args[9],args[10],args[11],args[12],args[13],context); break;
 371     case 15: func(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],
 372                   args[9],args[10],args[11],args[12],args[13],args[14],context); break;
 373     case 16: func(args[0],args[1],args[2],args[3],args[4],args[5], args[6],args[7],args[8],
 374                   args[9],args[10],args[11],args[12],args[13],args[14],args[15],context); break;
 375     default:
 376         ERR( "Unsupported nb of args %d\n", nb_args );
 377         assert(FALSE);
 378     }
 379
 380     DPRINTF( "Ret  %s() retval=%08lx ret=%08lx fs=%04lx\n",
 381              buffer, context->Eax, context->Eip, context->SegFs );
 382
 383     DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
 384             context->Eax, context->Ebx, context->Ecx,
 385             context->Edx, context->Esi, context->Edi );
 386     DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx gs=%04lx flags=%08lx\n",
 387             context->Ebp, context->Esp, context->SegDs,
 388             context->SegEs, context->SegGs, context->EFlags );
 389
 390     SYSLEVEL_CheckNotLevel( 2 );
 391 }
 392
 393
 394 /***********************************************************************
 395  *           RELAY_SetupDLL
 396  *
 397  * Setup relay debugging for a built-in dll.
 398  */
 399 void RELAY_SetupDLL( const char *module )
 400 {
 401     IMAGE_DATA_DIRECTORY *dir;
 402     IMAGE_EXPORT_DIRECTORY *exports;
 403     DEBUG_ENTRY_POINT *debug;
 404     DWORD *funcs;
 405     int i;
 406     const char *name, *dllname;
 407
 408     dir = &PE_HEADER(module)->OptionalHeader.DataDirectory[IMAGE_FILE_EXPORT_DIRECTORY];
 409     if (!dir->Size) return;
 410     exports = (IMAGE_EXPORT_DIRECTORY *)(module + dir->VirtualAddress);
 411     debug = (DEBUG_ENTRY_POINT *)((char *)exports + dir->Size);
 412     funcs = (DWORD *)(module + exports->AddressOfFunctions);
 413     dllname = module + exports->Name;
 414
 415     for (i = 0; i < exports->NumberOfFunctions; i++, funcs++, debug++)
 416     {
 417         int on = 1;
 418
 419         if (!debug->call) continue;  /* not a normal function */
 420         if (debug->call != 0xe8 && debug->call != 0xe9) break; /* not a debug thunk at all */
 421
 422         if ((name = find_exported_name( module, exports, i + exports->Base )))
 423         {
 424             char buffer[200];
 425             sprintf( buffer, "%s.%d: %s", dllname, i, name );
 426             on = RELAY_ShowDebugmsgRelay(buffer);
 427         }
 428
 429         if (on)
 430         {
 431             debug->call = 0xe8;  /* call relative */
 432             if (debug->args & 0x8000)  /* register func */
 433                 debug->callfrom32 = (char *)RELAY_CallFrom32Regs - (char *)&debug->ret;
 434             else
 435                 debug->callfrom32 = (char *)RELAY_CallFrom32 - (char *)&debug->ret;
 436         }
 437         else
 438         {
 439             debug->call = 0xe9;  /* jmp relative */
 440             debug->callfrom32 = (char *)debug->orig - (char *)&debug->ret;
 441         }
 442
 443         debug->orig = (FARPROC)(module + (DWORD)*funcs);
 444         *funcs = (char *)debug - module;
 445     }
 446 }
 447
 448 #else  /* __i386__ */
 449
 450 void RELAY_SetupDLL( const char *module )
 451 {
 452 }
 453
 454 #endif /* __i386__ */