relay32/relay386.c

   1 /*
   2  * 386-specific Win32 relay functions
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <assert.h>
  25 #include <string.h>
  26 #include <stdio.h>
  27
  28 #include "winnt.h"
  29 #include "winternl.h"
  30 #include "stackframe.h"
  31 #include "module.h"
  32 #include "wine/unicode.h"
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(relay);
  36 WINE_DECLARE_DEBUG_CHANNEL(snoop);
  37
  38 const char **debug_relay_excludelist = NULL;
  39 const char **debug_relay_includelist = NULL;
  40 const char **debug_snoop_excludelist = NULL;
  41 const char **debug_snoop_includelist = NULL;
  42
  43 /***********************************************************************
  44  *           build_list
  45  *
  46  * Build a function list from a ';'-separated string.
  47  */
  48 static const char **build_list( const WCHAR *bufferW )
  49 {
  50     int count = 1;
  51     char buffer[1024];
  52     const char *p = buffer;
  53     const char **ret;
  54
  55     RtlUnicodeToMultiByteN( buffer, sizeof(buffer), NULL,
  56                             bufferW, (strlenW(bufferW)+1) * sizeof(WCHAR) );
  57
  58     while ((p = strchr( p, ';' )))
  59     {
  60         count++;
  61         p++;
  62     }
  63     /* allocate count+1 pointers, plus the space for a copy of the string */
  64     if ((ret = HeapAlloc( GetProcessHeap(), 0, (count+1) * sizeof(char*) + strlen(buffer) + 1 )))
  65     {
  66         char *str = (char *)(ret + count + 1);
  67         char *p = str;
  68
  69         strcpy( str, buffer );
  70         count = 0;
  71         for (;;)
  72         {
  73             ret[count++] = p;
  74             if (!(p = strchr( p, ';' ))) break;
  75             *p++ = 0;
  76         }
  77         ret[count++] = NULL;
  78     }
  79     return ret;
  80 }
  81
  82
  83 /***********************************************************************
  84  *           RELAY_InitDebugLists
  85  *
  86  * Build the relay include/exclude function lists.
  87  */
  88 void RELAY_InitDebugLists(void)
  89 {
  90     OBJECT_ATTRIBUTES attr;
  91     UNICODE_STRING name;
  92     char buffer[1024];
  93     HKEY hkey;
  94     DWORD count;
  95     WCHAR *str;
  96     static const WCHAR configW[] = {'M','a','c','h','i','n','e','\\',
  97                                     'S','o','f','t','w','a','r','e','\\',
  98                                     'W','i','n','e','\\',
  99                                     'W','i','n','e','\\',
 100                                     'C','o','n','f','i','g','\\',
 101                                     'D','e','b','u','g',0};
 102     static const WCHAR RelayIncludeW[] = {'R','e','l','a','y','I','n','c','l','u','d','e',0};
 103     static const WCHAR RelayExcludeW[] = {'R','e','l','a','y','E','x','c','l','u','d','e',0};
 104     static const WCHAR SnoopIncludeW[] = {'S','n','o','o','p','I','n','c','l','u','d','e',0};
 105     static const WCHAR SnoopExcludeW[] = {'S','n','o','o','p','E','x','c','l','u','d','e',0};
 106
 107     attr.Length = sizeof(attr);
 108     attr.RootDirectory = 0;
 109     attr.ObjectName = &name;
 110     attr.Attributes = 0;
 111     attr.SecurityDescriptor = NULL;
 112     attr.SecurityQualityOfService = NULL;
 113     RtlInitUnicodeString( &name, configW );
 114
 115     if (NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr )) return;
 116
 117     str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)buffer)->Data;
 118     RtlInitUnicodeString( &name, RelayIncludeW );
 119     if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
 120     {
 121         TRACE("RelayInclude = %s\n", debugstr_w(str) );
 122         debug_relay_includelist = build_list( str );
 123     }
 124
 125     RtlInitUnicodeString( &name, RelayExcludeW );
 126     if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
 127     {
 128         TRACE( "RelayExclude = %s\n", debugstr_w(str) );
 129         debug_relay_excludelist = build_list( str );
 130     }
 131
 132     RtlInitUnicodeString( &name, SnoopIncludeW );
 133     if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
 134     {
 135         TRACE_(snoop)( "SnoopInclude = %s\n", debugstr_w(str) );
 136         debug_snoop_includelist = build_list( str );
 137     }
 138
 139     RtlInitUnicodeString( &name, SnoopExcludeW );
 140     if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
 141     {
 142         TRACE_(snoop)( "SnoopExclude = %s\n", debugstr_w(str) );
 143         debug_snoop_excludelist = build_list( str );
 144     }
 145
 146     NtClose( hkey );
 147 }
 148
 149
 150 #ifdef __i386__
 151
 152 typedef struct
 153 {
 154     BYTE          call;                    /* 0xe8 call callfrom32 (relative) */
 155     DWORD         callfrom32 WINE_PACKED;  /* RELAY_CallFrom32 relative addr */
 156     BYTE          ret;                     /* 0xc2 ret $n  or  0xc3 ret */
 157     WORD          args;                    /* nb of args to remove from the stack */
 158     void         *orig;                    /* original entry point */
 159     DWORD         argtypes;                /* argument types */
 160 } DEBUG_ENTRY_POINT;
 161
 162
 163 /***********************************************************************
 164  *           check_relay_include
 165  *
 166  * Check if a given function must be included in the relay output.
 167  */
 168 static BOOL check_relay_include( const char *module, const char *func )
 169 {
 170     const char **listitem;
 171     BOOL show;
 172
 173     if (!debug_relay_excludelist && !debug_relay_includelist) return TRUE;
 174     if (debug_relay_excludelist)
 175     {
 176         show = TRUE;
 177         listitem = debug_relay_excludelist;
 178     }
 179     else
 180     {
 181         show = FALSE;
 182         listitem = debug_relay_includelist;
 183     }
 184     for(; *listitem; listitem++)
 185     {
 186         char *p = strrchr( *listitem, '.' );
 187         if (p && p > *listitem)  /* check module and function */
 188         {
 189             int len = p - *listitem;
 190             if (strncasecmp( *listitem, module, len-1 ) || module[len]) continue;
 191             if (!strcmp( p + 1, func ) || !strcmp( p + 1, "*" )) return !show;
 192         }
 193         else  /* function only */
 194         {
 195             if (!strcmp( *listitem, func )) return !show;
 196         }
 197     }
 198     return show;
 199 }
 200
 201
 202 /***********************************************************************
 203  *           find_exported_name
 204  *
 205  * Find the name of an exported function.
 206  */
 207 static const char *find_exported_name( const char *module,
 208                                        IMAGE_EXPORT_DIRECTORY *exp, int ordinal )
 209 {
 210     int i;
 211     const char *ret = NULL;
 212
 213     WORD *ordptr = (WORD *)(module + exp->AddressOfNameOrdinals);
 214     for (i = 0; i < exp->NumberOfNames; i++, ordptr++)
 215         if (*ordptr + exp->Base == ordinal) break;
 216     if (i < exp->NumberOfNames)
 217         ret = module + ((DWORD*)(module + exp->AddressOfNames))[i];
 218     return ret;
 219 }
 220
 221
 222 /***********************************************************************
 223  *           get_entry_point
 224  *
 225  * Get the name of the DLL entry point corresponding to a relay address.
 226  */
 227 static void get_entry_point( char *buffer, DEBUG_ENTRY_POINT *relay )
 228 {
 229     IMAGE_EXPORT_DIRECTORY *exp = NULL;
 230     DEBUG_ENTRY_POINT *debug;
 231     char *p, *base = NULL;
 232     const char *name;
 233     int ordinal = 0;
 234     WINE_MODREF *wm;
 235     DWORD size;
 236
 237     /* First find the module */
 238
 239     for (wm = MODULE_modref_list; wm; wm = wm->next)
 240     {
 241         if (!(wm->flags & WINE_MODREF_INTERNAL)) continue;
 242         exp = RtlImageDirectoryEntryToData( wm->module, TRUE, IMAGE_DIRECTORY_ENTRY_EXPORT, &size );
 243         if (!exp) continue;
 244         debug = (DEBUG_ENTRY_POINT *)((char *)exp + size);
 245         if (debug <= relay && relay < debug + exp->NumberOfFunctions)
 246         {
 247             ordinal = relay - debug;
 248             break;
 249         }
 250     }
 251
 252     /* Now find the function */
 253
 254     base = (char *)wm->module;
 255     strcpy( buffer, base + exp->Name );
 256     p = buffer + strlen(buffer);
 257     if (p > buffer + 4 && !strcasecmp( p - 4, ".dll" )) p -= 4;
 258
 259     if ((name = find_exported_name( base, exp, ordinal + exp->Base )))
 260         sprintf( p, ".%s", name );
 261     else
 262         sprintf( p, ".%ld", ordinal + exp->Base );
 263 }
 264
 265
 266 /***********************************************************************
 267  *           RELAY_PrintArgs
 268  */
 269 static inline void RELAY_PrintArgs( int *args, int nb_args, unsigned int typemask )
 270 {
 271     while (nb_args--)
 272     {
 273         if ((typemask & 3) && HIWORD(*args))
 274         {
 275             if (typemask & 2)
 276                 DPRINTF( "%08x %s", *args, debugstr_w((LPWSTR)*args) );
 277             else
 278                 DPRINTF( "%08x %s", *args, debugstr_a((LPCSTR)*args) );
 279         }
 280         else DPRINTF( "%08x", *args );
 281         if (nb_args) DPRINTF( "," );
 282         args++;
 283         typemask >>= 2;
 284     }
 285 }
 286
 287
 288 typedef LONGLONG (*LONGLONG_CPROC)();
 289 typedef LONGLONG (WINAPI *LONGLONG_FARPROC)();
 290
 291
 292 /***********************************************************************
 293  *           call_cdecl_function
 294  */
 295 static LONGLONG call_cdecl_function( LONGLONG_CPROC func, int nb_args, const int *args )
 296 {
 297     LONGLONG ret;
 298     switch(nb_args)
 299     {
 300     case 0: ret = func(); break;
 301     case 1: ret = func(args[0]); break;
 302     case 2: ret = func(args[0],args[1]); break;
 303     case 3: ret = func(args[0],args[1],args[2]); break;
 304     case 4: ret = func(args[0],args[1],args[2],args[3]); break;
 305     case 5: ret = func(args[0],args[1],args[2],args[3],args[4]); break;
 306     case 6: ret = func(args[0],args[1],args[2],args[3],args[4],
 307                        args[5]); break;
 308     case 7: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 309                        args[6]); break;
 310     case 8: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 311                        args[6],args[7]); break;
 312     case 9: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 313                        args[6],args[7],args[8]); break;
 314     case 10: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 315                         args[6],args[7],args[8],args[9]); break;
 316     case 11: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 317                         args[6],args[7],args[8],args[9],args[10]); break;
 318     case 12: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 319                         args[6],args[7],args[8],args[9],args[10],
 320                         args[11]); break;
 321     case 13: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 322                         args[6],args[7],args[8],args[9],args[10],args[11],
 323                         args[12]); break;
 324     case 14: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 325                         args[6],args[7],args[8],args[9],args[10],args[11],
 326                         args[12],args[13]); break;
 327     case 15: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 328                         args[6],args[7],args[8],args[9],args[10],args[11],
 329                         args[12],args[13],args[14]); break;
 330     case 16: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 331                         args[6],args[7],args[8],args[9],args[10],args[11],
 332                         args[12],args[13],args[14],args[15]); break;
 333     default:
 334         ERR( "Unsupported nb of args %d\n", nb_args );
 335         assert(FALSE);
 336     }
 337     return ret;
 338 }
 339
 340
 341 /***********************************************************************
 342  *           call_stdcall_function
 343  */
 344 static LONGLONG call_stdcall_function( LONGLONG_FARPROC func, int nb_args, const int *args )
 345 {
 346     LONGLONG ret;
 347     switch(nb_args)
 348     {
 349     case 0: ret = func(); break;
 350     case 1: ret = func(args[0]); break;
 351     case 2: ret = func(args[0],args[1]); break;
 352     case 3: ret = func(args[0],args[1],args[2]); break;
 353     case 4: ret = func(args[0],args[1],args[2],args[3]); break;
 354     case 5: ret = func(args[0],args[1],args[2],args[3],args[4]); break;
 355     case 6: ret = func(args[0],args[1],args[2],args[3],args[4],
 356                        args[5]); break;
 357     case 7: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 358                        args[6]); break;
 359     case 8: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 360                        args[6],args[7]); break;
 361     case 9: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 362                        args[6],args[7],args[8]); break;
 363     case 10: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 364                         args[6],args[7],args[8],args[9]); break;
 365     case 11: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 366                         args[6],args[7],args[8],args[9],args[10]); break;
 367     case 12: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 368                         args[6],args[7],args[8],args[9],args[10],
 369                         args[11]); break;
 370     case 13: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 371                         args[6],args[7],args[8],args[9],args[10],args[11],
 372                         args[12]); break;
 373     case 14: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 374                         args[6],args[7],args[8],args[9],args[10],args[11],
 375                         args[12],args[13]); break;
 376     case 15: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 377                         args[6],args[7],args[8],args[9],args[10],args[11],
 378                         args[12],args[13],args[14]); break;
 379     case 16: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 380                         args[6],args[7],args[8],args[9],args[10],args[11],
 381                         args[12],args[13],args[14],args[15]); break;
 382     default:
 383         ERR( "Unsupported nb of args %d\n", nb_args );
 384         assert(FALSE);
 385     }
 386     return ret;
 387 }
 388
 389
 390 /***********************************************************************
 391  *           RELAY_CallFrom32
 392  *
 393  * Stack layout on entry to this function:
 394  *  ...      ...
 395  * (esp+12)  arg2
 396  * (esp+8)   arg1
 397  * (esp+4)   ret_addr
 398  * (esp)     return addr to relay code
 399  */
 400 static LONGLONG RELAY_CallFrom32( int ret_addr, ... )
 401 {
 402     LONGLONG ret;
 403     char buffer[80];
 404
 405     int *args = &ret_addr + 1;
 406     /* Relay addr is the return address for this function */
 407     BYTE *relay_addr = (BYTE *)__builtin_return_address(0);
 408     DEBUG_ENTRY_POINT *relay = (DEBUG_ENTRY_POINT *)(relay_addr - 5);
 409     WORD nb_args = relay->args / sizeof(int);
 410
 411     if (TRACE_ON(relay))
 412     {
 413         get_entry_point( buffer, relay );
 414
 415         DPRINTF( "%08lx:Call %s(", GetCurrentThreadId(), buffer );
 416         RELAY_PrintArgs( args, nb_args, relay->argtypes );
 417         DPRINTF( ") ret=%08x\n", ret_addr );
 418     }
 419
 420     if (relay->ret == 0xc3) /* cdecl */
 421     {
 422         ret = call_cdecl_function( (LONGLONG_CPROC)relay->orig, nb_args, args );
 423     }
 424     else  /* stdcall */
 425     {
 426         ret = call_stdcall_function( (LONGLONG_FARPROC)relay->orig, nb_args, args );
 427     }
 428
 429     if (TRACE_ON(relay))
 430     {
 431         BOOL ret64 = (relay->argtypes & 0x80000000) && (nb_args < 16);
 432         if (ret64)
 433             DPRINTF( "%08lx:Ret  %s() retval=%08x%08x ret=%08x\n",
 434                      GetCurrentThreadId(),
 435                      buffer, (UINT)(ret >> 32), (UINT)ret, ret_addr );
 436         else
 437             DPRINTF( "%08lx:Ret  %s() retval=%08x ret=%08x\n",
 438                      GetCurrentThreadId(),
 439                      buffer, (UINT)ret, ret_addr );
 440     }
 441     return ret;
 442 }
 443
 444
 445 /***********************************************************************
 446  *           RELAY_CallFrom32Regs
 447  *
 448  * Stack layout (esp is context->Esp, not the current %esp):
 449  *
 450  * ...
 451  * (esp+4) first arg
 452  * (esp)   return addr to caller
 453  * (esp-4) return addr to DEBUG_ENTRY_POINT
 454  * (esp-8) ptr to relay entry code for RELAY_CallFrom32Regs
 455  *  ...    >128 bytes space free to be modified (ensured by the assembly glue)
 456  */
 457 void WINAPI RELAY_DoCallFrom32Regs( CONTEXT86 *context )
 458 {
 459     char buffer[80];
 460     int* args;
 461     int args_copy[17];
 462     BYTE *entry_point;
 463
 464     BYTE *relay_addr = *((BYTE **)context->Esp - 1);
 465     DEBUG_ENTRY_POINT *relay = (DEBUG_ENTRY_POINT *)(relay_addr - 5);
 466     WORD nb_args = relay->args / sizeof(int);
 467
 468     /* remove extra stuff from the stack */
 469     context->Eip = stack32_pop(context);
 470     args = (int *)context->Esp;
 471     if (relay->ret == 0xc2) /* stdcall */
 472         context->Esp += nb_args * sizeof(int);
 473
 474     entry_point = (BYTE *)relay->orig;
 475     assert( *entry_point == 0xe8 /* lcall */ );
 476
 477     if (TRACE_ON(relay))
 478     {
 479         get_entry_point( buffer, relay );
 480
 481         DPRINTF( "%08lx:Call %s(", GetCurrentThreadId(), buffer );
 482         RELAY_PrintArgs( args, nb_args, relay->argtypes );
 483         DPRINTF( ") ret=%08lx fs=%04lx\n", context->Eip, context->SegFs );
 484
 485         DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
 486                 context->Eax, context->Ebx, context->Ecx,
 487                 context->Edx, context->Esi, context->Edi );
 488         DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx gs=%04lx flags=%08lx\n",
 489                 context->Ebp, context->Esp, context->SegDs,
 490                 context->SegEs, context->SegGs, context->EFlags );
 491     }
 492
 493     /* Now call the real function */
 494
 495     memcpy( args_copy, args, nb_args * sizeof(args[0]) );
 496     args_copy[nb_args] = (int)context;  /* append context argument */
 497     if (relay->ret == 0xc3) /* cdecl */
 498     {
 499         call_cdecl_function( *(LONGLONG_CPROC *)(entry_point + 5), nb_args+1, args_copy );
 500     }
 501     else  /* stdcall */
 502     {
 503         call_stdcall_function( *(LONGLONG_FARPROC *)(entry_point + 5), nb_args+1, args_copy );
 504     }
 505
 506     if (TRACE_ON(relay))
 507     {
 508         DPRINTF( "%08lx:Ret  %s() retval=%08lx ret=%08lx fs=%04lx\n",
 509                  GetCurrentThreadId(),
 510                  buffer, context->Eax, context->Eip, context->SegFs );
 511
 512         DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
 513                 context->Eax, context->Ebx, context->Ecx,
 514                 context->Edx, context->Esi, context->Edi );
 515         DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx gs=%04lx flags=%08lx\n",
 516                 context->Ebp, context->Esp, context->SegDs,
 517                 context->SegEs, context->SegGs, context->EFlags );
 518     }
 519 }
 520
 521 void WINAPI RELAY_CallFrom32Regs(void);
 522 __ASM_GLOBAL_FUNC( RELAY_CallFrom32Regs,
 523                    "call " __ASM_NAME("__wine_call_from_32_regs") "\n\t"
 524                    ".long " __ASM_NAME("RELAY_DoCallFrom32Regs") ",0" );
 525
 526
 527 /* check whether the function at addr starts with a call to __wine_call_from_32_regs */
 528 static BOOL is_register_entry_point( const BYTE *addr )
 529 {
 530     extern void __wine_call_from_32_regs();
 531     int *offset;
 532     void *ptr;
 533
 534     if (*addr != 0xe8) return FALSE;  /* not a call */
 535     /* check if call target is __wine_call_from_32_regs */
 536     offset = (int *)(addr + 1);
 537     if (*offset == (char *)__wine_call_from_32_regs - (char *)(offset + 1)) return TRUE;
 538     /* now check if call target is an import table jump to __wine_call_from_32_regs */
 539     addr = (BYTE *)(offset + 1) + *offset;
 540     if (addr[0] != 0xff || addr[1] != 0x25) return FALSE;  /* not an indirect jmp */
 541     ptr = *(void **)(addr + 2);  /* get indirect jmp target address */
 542     return (*(char **)ptr == (char *)__wine_call_from_32_regs);
 543 }
 544
 545
 546 /***********************************************************************
 547  *           RELAY_SetupDLL
 548  *
 549  * Setup relay debugging for a built-in dll.
 550  */
 551 void RELAY_SetupDLL( const char *module )
 552 {
 553     IMAGE_EXPORT_DIRECTORY *exports;
 554     DEBUG_ENTRY_POINT *debug;
 555     DWORD *funcs;
 556     int i;
 557     const char *name;
 558     char *p, dllname[80];
 559     DWORD size;
 560
 561     exports = RtlImageDirectoryEntryToData( (HMODULE)module, TRUE,
 562                                             IMAGE_DIRECTORY_ENTRY_EXPORT, &size );
 563     if (!exports) return;
 564     debug = (DEBUG_ENTRY_POINT *)((char *)exports + size);
 565     funcs = (DWORD *)(module + exports->AddressOfFunctions);
 566     strcpy( dllname, module + exports->Name );
 567     p = dllname + strlen(dllname) - 4;
 568     if (p > dllname && !strcasecmp( p, ".dll" )) *p = 0;
 569
 570     for (i = 0; i < exports->NumberOfFunctions; i++, funcs++, debug++)
 571     {
 572         int on = 1;
 573
 574         if (!debug->call) continue;  /* not a normal function */
 575         if (debug->call != 0xe8 && debug->call != 0xe9) break; /* not a debug thunk at all */
 576
 577         if ((name = find_exported_name( module, exports, i + exports->Base )))
 578             on = check_relay_include( dllname, name );
 579
 580         if (on)
 581         {
 582             debug->call = 0xe8;  /* call relative */
 583             if (is_register_entry_point( debug->orig ))
 584                 debug->callfrom32 = (char *)RELAY_CallFrom32Regs - (char *)&debug->ret;
 585             else
 586                 debug->callfrom32 = (char *)RELAY_CallFrom32 - (char *)&debug->ret;
 587         }
 588         else
 589         {
 590             debug->call = 0xe9;  /* jmp relative */
 591             debug->callfrom32 = (char *)debug->orig - (char *)&debug->ret;
 592         }
 593
 594         debug->orig = (FARPROC)(module + (DWORD)*funcs);
 595         *funcs = (char *)debug - module;
 596     }
 597 }
 598
 599 #else  /* __i386__ */
 600
 601 void RELAY_SetupDLL( const char *module )
 602 {
 603 }
 604
 605 #endif /* __i386__ */