dlls/kernel/relay16.c

   1 /*
   2  * Copyright 1993 Robert J. Amstadt
   3  * Copyright 1995 Alexandre Julliard
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include "config.h"
  21 #include "wine/port.h"
  22
  23 #include <assert.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "wine/winbase16.h"
  32 #include "winternl.h"
  33 #include "kernel_private.h"
  34 #include "kernel16_private.h"
  35 #include "wine/unicode.h"
  36 #include "wine/library.h"
  37 #include "wine/debug.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(relay);
  40
  41 #ifdef __i386__
  42
  43 static const WCHAR **debug_relay_excludelist;
  44 static const WCHAR **debug_relay_includelist;
  45 static const WCHAR **debug_snoop_excludelist;
  46 static const WCHAR **debug_snoop_includelist;
  47
  48 /* compare an ASCII and a Unicode string without depending on the current codepage */
  49 inline static int strcmpiAW( const char *strA, const WCHAR *strW )
  50 {
  51     while (*strA && (toupperW((unsigned char)*strA) == toupperW(*strW))) { strA++; strW++; }
  52     return toupperW((unsigned char)*strA) - toupperW(*strW);
  53 }
  54
  55 /* compare an ASCII and a Unicode string without depending on the current codepage */
  56 inline static int strncmpiAW( const char *strA, const WCHAR *strW, int n )
  57 {
  58     int ret = 0;
  59     for ( ; n > 0; n--, strA++, strW++)
  60         if ((ret = toupperW((unsigned char)*strA) - toupperW(*strW)) || !*strA) break;
  61     return ret;
  62 }
  63
  64 /***********************************************************************
  65  *           build_list
  66  *
  67  * Build a function list from a ';'-separated string.
  68  */
  69 static const WCHAR **build_list( const WCHAR *buffer )
  70 {
  71     int count = 1;
  72     const WCHAR *p = buffer;
  73     const WCHAR **ret;
  74
  75     while ((p = strchrW( p, ';' )))
  76     {
  77         count++;
  78         p++;
  79     }
  80     /* allocate count+1 pointers, plus the space for a copy of the string */
  81     if ((ret = RtlAllocateHeap( GetProcessHeap(), 0,
  82                                 (count+1) * sizeof(WCHAR*) + (strlenW(buffer)+1) * sizeof(WCHAR) )))
  83     {
  84         WCHAR *str = (WCHAR *)(ret + count + 1);
  85         WCHAR *p = str;
  86
  87         strcpyW( str, buffer );
  88         count = 0;
  89         for (;;)
  90         {
  91             ret[count++] = p;
  92             if (!(p = strchrW( p, ';' ))) break;
  93             *p++ = 0;
  94         }
  95         ret[count++] = NULL;
  96     }
  97     return ret;
  98 }
  99
 100
 101 /***********************************************************************
 102  *           RELAY16_InitDebugLists
 103  *
 104  * Build the relay include/exclude function lists.
 105  */
 106 void RELAY16_InitDebugLists(void)
 107 {
 108     OBJECT_ATTRIBUTES attr;
 109     UNICODE_STRING name;
 110     char buffer[1024];
 111     HANDLE root, hkey;
 112     DWORD count;
 113     WCHAR *str;
 114     static const WCHAR configW[] = {'S','o','f','t','w','a','r','e','\\',
 115                                     'W','i','n','e','\\',
 116                                     'D','e','b','u','g',0};
 117     static const WCHAR RelayIncludeW[] = {'R','e','l','a','y','I','n','c','l','u','d','e',0};
 118     static const WCHAR RelayExcludeW[] = {'R','e','l','a','y','E','x','c','l','u','d','e',0};
 119     static const WCHAR SnoopIncludeW[] = {'S','n','o','o','p','I','n','c','l','u','d','e',0};
 120     static const WCHAR SnoopExcludeW[] = {'S','n','o','o','p','E','x','c','l','u','d','e',0};
 121
 122     RtlOpenCurrentUser( KEY_ALL_ACCESS, &root );
 123     attr.Length = sizeof(attr);
 124     attr.RootDirectory = root;
 125     attr.ObjectName = &name;
 126     attr.Attributes = 0;
 127     attr.SecurityDescriptor = NULL;
 128     attr.SecurityQualityOfService = NULL;
 129     RtlInitUnicodeString( &name, configW );
 130
 131     /* @@ Wine registry key: HKCU\Software\Wine\Debug */
 132     if (NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr )) hkey = 0;
 133     NtClose( root );
 134     if (!hkey) return;
 135
 136     str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)buffer)->Data;
 137     RtlInitUnicodeString( &name, RelayIncludeW );
 138     if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
 139     {
 140         debug_relay_includelist = build_list( str );
 141     }
 142
 143     RtlInitUnicodeString( &name, RelayExcludeW );
 144     if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
 145     {
 146         debug_relay_excludelist = build_list( str );
 147     }
 148
 149     RtlInitUnicodeString( &name, SnoopIncludeW );
 150     if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
 151     {
 152         debug_snoop_includelist = build_list( str );
 153     }
 154
 155     RtlInitUnicodeString( &name, SnoopExcludeW );
 156     if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
 157     {
 158         debug_snoop_excludelist = build_list( str );
 159     }
 160     NtClose( hkey );
 161 }
 162
 163
 164 /***********************************************************************
 165  *           check_list
 166  *
 167  * Check if a given module and function is in the list.
 168  */
 169 static BOOL check_list( const char *module, int ordinal, const char *func, const WCHAR **list )
 170 {
 171     char ord_str[10];
 172
 173     sprintf( ord_str, "%d", ordinal );
 174     for(; *list; list++)
 175     {
 176         const WCHAR *p = strrchrW( *list, '.' );
 177         if (p && p > *list)  /* check module and function */
 178         {
 179             int len = p - *list;
 180             if (strncmpiAW( module, *list, len-1 ) || module[len]) continue;
 181             if (p[1] == '*' && !p[2]) return TRUE;
 182             if (!strcmpiAW( ord_str, p + 1 )) return TRUE;
 183             if (func && !strcmpiAW( func, p + 1 )) return TRUE;
 184         }
 185         else  /* function only */
 186         {
 187             if (func && !strcmpiAW( func, *list )) return TRUE;
 188         }
 189     }
 190     return FALSE;
 191 }
 192
 193
 194 /***********************************************************************
 195  *           RELAY_ShowDebugmsgRelay
 196  *
 197  * Simple function to decide if a particular debugging message is
 198  * wanted.
 199  */
 200 static BOOL RELAY_ShowDebugmsgRelay(const char *module, int ordinal, const char *func)
 201 {
 202     if (debug_relay_excludelist && check_list( module, ordinal, func, debug_relay_excludelist ))
 203         return FALSE;
 204     if (debug_relay_includelist && !check_list( module, ordinal, func, debug_relay_includelist ))
 205         return FALSE;
 206     return TRUE;
 207 }
 208
 209
 210 /***********************************************************************
 211  *          SNOOP16_ShowDebugmsgSnoop
 212  *
 213  * Simple function to decide if a particular debugging message is
 214  * wanted.
 215  */
 216 int SNOOP16_ShowDebugmsgSnoop(const char *module, int ordinal, const char *func)
 217 {
 218     if (debug_snoop_excludelist && check_list( module, ordinal, func, debug_snoop_excludelist ))
 219         return FALSE;
 220     if (debug_snoop_includelist && !check_list( module, ordinal, func, debug_snoop_includelist ))
 221         return FALSE;
 222     return TRUE;
 223 }
 224
 225
 226 /***********************************************************************
 227  *           get_entry_point
 228  *
 229  * Return the ordinal, name, and type info corresponding to a CS:IP address.
 230  */
 231 static const CALLFROM16 *get_entry_point( STACK16FRAME *frame, LPSTR module, LPSTR func, WORD *pOrd )
 232 {
 233     WORD i, max_offset;
 234     register BYTE *p;
 235     NE_MODULE *pModule;
 236     ET_BUNDLE *bundle;
 237     ET_ENTRY *entry;
 238
 239     *pOrd = 0;
 240     if (!(pModule = NE_GetPtr( FarGetOwner16( GlobalHandle16( frame->module_cs ) ))))
 241         return NULL;
 242
 243     max_offset = 0;
 244     bundle = (ET_BUNDLE *)((BYTE *)pModule + pModule->ne_enttab);
 245     do
 246     {
 247         entry = (ET_ENTRY *)((BYTE *)bundle+6);
 248         for (i = bundle->first + 1; i <= bundle->last; i++)
 249         {
 250             if ((entry->offs < frame->entry_ip)
 251             && (entry->segnum == 1) /* code segment ? */
 252             && (entry->offs >= max_offset))
 253             {
 254                 max_offset = entry->offs;
 255                 *pOrd = i;
 256             }
 257             entry++;
 258         }
 259     } while ( (bundle->next)
 260            && (bundle = (ET_BUNDLE *)((BYTE *)pModule+bundle->next)));
 261
 262     /* Search for the name in the resident names table */
 263     /* (built-in modules have no non-resident table)   */
 264
 265     p = (BYTE *)pModule + pModule->ne_restab;
 266     memcpy( module, p + 1, *p );
 267     module[*p] = 0;
 268
 269     while (*p)
 270     {
 271         p += *p + 1 + sizeof(WORD);
 272         if (*(WORD *)(p + *p + 1) == *pOrd) break;
 273     }
 274     memcpy( func, p + 1, *p );
 275     func[*p] = 0;
 276
 277     /* Retrieve entry point call structure */
 278     p = MapSL( MAKESEGPTR( frame->module_cs, frame->callfrom_ip ) );
 279     /* p now points to lret, get the start of CALLFROM16 structure */
 280     return (CALLFROM16 *)(p - (BYTE *)&((CALLFROM16 *)0)->ret);
 281 }
 282
 283
 284 extern int call_entry_point( void *func, int nb_args, const int *args );
 285 __ASM_GLOBAL_FUNC( call_entry_point,
 286                    "\tpushl %ebp\n"
 287                    "\tmovl %esp,%ebp\n"
 288                    "\tmovl 12(%ebp),%ecx\n"
 289                    "\tmovl 16(%ebp),%edx\n"
 290                    "\tjecxz 1f\n"
 291                    "2:\tpushl -4(%edx,%ecx,4)\n"
 292                    "\tloop 2b\n"
 293                    "1:\tcall *8(%ebp)\n"
 294                    "\tmovl %ebp,%esp\n"
 295                    "\tleave\n"
 296                    "\tret" );
 297
 298
 299 /***********************************************************************
 300  *           relay_call_from_16_no_debug
 301  *
 302  * Same as relay_call_from_16 but doesn't print any debug information.
 303  */
 304 static int relay_call_from_16_no_debug( void *entry_point, unsigned char *args16, CONTEXT86 *context,
 305                                         const CALLFROM16 *call )
 306 {
 307     unsigned int i, j, nb_args = 0;
 308     int args32[20];
 309
 310     /* look for the ret instruction */
 311     for (j = 0; j < sizeof(call->ret)/sizeof(call->ret[0]); j++)
 312         if (call->ret[j] == 0xca66 || call->ret[j] == 0xcb66) break;
 313
 314     if (call->ret[j] == 0xcb66)  /* cdecl */
 315     {
 316         for (i = 0; i < 20; i++, nb_args++)
 317         {
 318             int type = (call->arg_types[i / 10] >> (3 * (i % 10))) & 7;
 319
 320             if (type == ARG_NONE) break;
 321             switch(type)
 322             {
 323             case ARG_WORD:
 324                 args32[nb_args] = *(WORD *)args16;
 325                 args16 += sizeof(WORD);
 326                 break;
 327             case ARG_SWORD:
 328                 args32[nb_args] = *(short *)args16;
 329                 args16 += sizeof(WORD);
 330                 break;
 331             case ARG_LONG:
 332             case ARG_SEGSTR:
 333                 args32[nb_args] = *(int *)args16;
 334                 args16 += sizeof(int);
 335                 break;
 336             case ARG_PTR:
 337             case ARG_STR:
 338                 args32[nb_args] = (int)MapSL( *(SEGPTR *)args16 );
 339                 args16 += sizeof(SEGPTR);
 340                 break;
 341             case ARG_VARARG:
 342                 args32[nb_args] = (int)args16;
 343                 break;
 344             default:
 345                 break;
 346             }
 347         }
 348     }
 349     else  /* not cdecl */
 350     {
 351         /* Start with the last arg */
 352         args16 += call->ret[j + 1];
 353         for (i = 0; i < 20; i++, nb_args++)
 354         {
 355             int type = (call->arg_types[i / 10] >> (3 * (i % 10))) & 7;
 356
 357             if (type == ARG_NONE) break;
 358             switch(type)
 359             {
 360             case ARG_WORD:
 361                 args16 -= sizeof(WORD);
 362                 args32[nb_args] = *(WORD *)args16;
 363                 break;
 364             case ARG_SWORD:
 365                 args16 -= sizeof(WORD);
 366                 args32[nb_args] = *(short *)args16;
 367                 break;
 368             case ARG_LONG:
 369             case ARG_SEGSTR:
 370                 args16 -= sizeof(int);
 371                 args32[nb_args] = *(int *)args16;
 372                 break;
 373             case ARG_PTR:
 374             case ARG_STR:
 375                 args16 -= sizeof(SEGPTR);
 376                 args32[nb_args] = (int)MapSL( *(SEGPTR *)args16 );
 377                 break;
 378             default:
 379                 break;
 380             }
 381         }
 382     }
 383
 384     if (!j)  /* register function */
 385         args32[nb_args++] = (int)context;
 386
 387     SYSLEVEL_CheckNotLevel( 2 );
 388
 389     return call_entry_point( entry_point, nb_args, args32 );
 390 }
 391
 392
 393 /***********************************************************************
 394  *           relay_call_from_16
 395  *
 396  * Replacement for the 16-bit relay functions when relay debugging is on.
 397  */
 398 int relay_call_from_16( void *entry_point, unsigned char *args16, CONTEXT86 *context )
 399 {
 400     STACK16FRAME *frame;
 401     WORD ordinal;
 402     unsigned int i, j, nb_args = 0;
 403     int ret_val, args32[20];
 404     char module[10], func[64];
 405     const CALLFROM16 *call;
 406
 407     frame = CURRENT_STACK16;
 408     call = get_entry_point( frame, module, func, &ordinal );
 409     if (!TRACE_ON(relay) || !RELAY_ShowDebugmsgRelay( module, ordinal, func ))
 410         return relay_call_from_16_no_debug( entry_point, args16, context, call );
 411
 412     DPRINTF( "%04lx:Call %s.%d: %s(",GetCurrentThreadId(), module, ordinal, func );
 413
 414     /* look for the ret instruction */
 415     for (j = 0; j < sizeof(call->ret)/sizeof(call->ret[0]); j++)
 416         if (call->ret[j] == 0xca66 || call->ret[j] == 0xcb66) break;
 417
 418     if (call->ret[j] == 0xcb66)  /* cdecl */
 419     {
 420         for (i = 0; i < 20; i++, nb_args++)
 421         {
 422             int type = (call->arg_types[i / 10] >> (3 * (i % 10))) & 7;
 423
 424             if (type == ARG_NONE) break;
 425             if (i) DPRINTF( "," );
 426             switch(type)
 427             {
 428             case ARG_WORD:
 429                 DPRINTF( "%04x", *(WORD *)args16 );
 430                 args32[nb_args] = *(WORD *)args16;
 431                 args16 += sizeof(WORD);
 432                 break;
 433             case ARG_SWORD:
 434                 DPRINTF( "%04x", *(WORD *)args16 );
 435                 args32[nb_args] = *(short *)args16;
 436                 args16 += sizeof(WORD);
 437                 break;
 438             case ARG_LONG:
 439                 DPRINTF( "%08x", *(int *)args16 );
 440                 args32[nb_args] = *(int *)args16;
 441                 args16 += sizeof(int);
 442                 break;
 443             case ARG_PTR:
 444                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 445                 args32[nb_args] = (int)MapSL( *(SEGPTR *)args16 );
 446                 args16 += sizeof(SEGPTR);
 447                 break;
 448             case ARG_STR:
 449                 DPRINTF( "%08x %s", *(int *)args16,
 450                          debugstr_a( MapSL(*(SEGPTR *)args16 )));
 451                 args32[nb_args] = (int)MapSL( *(SEGPTR *)args16 );
 452                 args16 += sizeof(int);
 453                 break;
 454             case ARG_SEGSTR:
 455                 DPRINTF( "%04x:%04x %s", *(WORD *)(args16+2), *(WORD *)args16,
 456                          debugstr_a( MapSL(*(SEGPTR *)args16 )) );
 457                 args32[nb_args] = *(SEGPTR *)args16;
 458                 args16 += sizeof(SEGPTR);
 459                 break;
 460             case ARG_VARARG:
 461                 DPRINTF( "..." );
 462                 args32[nb_args] = (int)args16;
 463                 break;
 464             default:
 465                 break;
 466             }
 467         }
 468     }
 469     else  /* not cdecl */
 470     {
 471         /* Start with the last arg */
 472         args16 += call->ret[j + 1];
 473         for (i = 0; i < 20; i++, nb_args++)
 474         {
 475             int type = (call->arg_types[i / 10] >> (3 * (i % 10))) & 7;
 476
 477             if (type == ARG_NONE) break;
 478             if (i) DPRINTF( "," );
 479             switch(type)
 480             {
 481             case ARG_WORD:
 482                 args16 -= sizeof(WORD);
 483                 args32[nb_args] = *(WORD *)args16;
 484                 DPRINTF( "%04x", *(WORD *)args16 );
 485                 break;
 486             case ARG_SWORD:
 487                 args16 -= sizeof(WORD);
 488                 args32[nb_args] = *(short *)args16;
 489                 DPRINTF( "%04x", *(WORD *)args16 );
 490                 break;
 491             case ARG_LONG:
 492                 args16 -= sizeof(int);
 493                 args32[nb_args] = *(int *)args16;
 494                 DPRINTF( "%08x", *(int *)args16 );
 495                 break;
 496             case ARG_PTR:
 497                 args16 -= sizeof(SEGPTR);
 498                 args32[nb_args] = (int)MapSL( *(SEGPTR *)args16 );
 499                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 500                 break;
 501             case ARG_STR:
 502                 args16 -= sizeof(int);
 503                 args32[nb_args] = (int)MapSL( *(SEGPTR *)args16 );
 504                 DPRINTF( "%08x %s", *(int *)args16,
 505                          debugstr_a( MapSL(*(SEGPTR *)args16 )));
 506                 break;
 507             case ARG_SEGSTR:
 508                 args16 -= sizeof(SEGPTR);
 509                 args32[nb_args] = *(SEGPTR *)args16;
 510                 DPRINTF( "%04x:%04x %s", *(WORD *)(args16+2), *(WORD *)args16,
 511                          debugstr_a( MapSL(*(SEGPTR *)args16 )) );
 512                 break;
 513             case ARG_VARARG:
 514                 DPRINTF( "..." );
 515                 args32[nb_args] = (int)args16;
 516                 break;
 517             default:
 518                 break;
 519             }
 520         }
 521     }
 522
 523     DPRINTF( ") ret=%04x:%04x ds=%04x\n", frame->cs, frame->ip, frame->ds );
 524
 525     if (!j)  /* register function */
 526     {
 527         args32[nb_args++] = (int)context;
 528         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 529                 (WORD)context->Eax, (WORD)context->Ebx, (WORD)context->Ecx,
 530                 (WORD)context->Edx, (WORD)context->Esi, (WORD)context->Edi,
 531                 (WORD)context->SegEs, context->EFlags );
 532     }
 533
 534     SYSLEVEL_CheckNotLevel( 2 );
 535
 536     ret_val = call_entry_point( entry_point, nb_args, args32 );
 537
 538     SYSLEVEL_CheckNotLevel( 2 );
 539
 540     DPRINTF( "%04lx:Ret  %s.%d: %s() ",GetCurrentThreadId(), module, ordinal, func );
 541     if (!j)  /* register function */
 542     {
 543         DPRINTF("retval=none ret=%04x:%04x ds=%04x\n",
 544                 (WORD)context->SegCs, LOWORD(context->Eip), (WORD)context->SegDs);
 545         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 546                 (WORD)context->Eax, (WORD)context->Ebx, (WORD)context->Ecx,
 547                 (WORD)context->Edx, (WORD)context->Esi, (WORD)context->Edi,
 548                 (WORD)context->SegEs, context->EFlags );
 549     }
 550     else
 551     {
 552         frame = CURRENT_STACK16;  /* might have be changed by the entry point */
 553         if (j == 1)  /* 16-bit return sequence */
 554             DPRINTF( "retval=%04x ret=%04x:%04x ds=%04x\n",
 555                      ret_val & 0xffff, frame->cs, frame->ip, frame->ds );
 556         else
 557             DPRINTF( "retval=%08x ret=%04x:%04x ds=%04x\n",
 558                      ret_val, frame->cs, frame->ip, frame->ds );
 559     }
 560     return ret_val;
 561 }
 562
 563 #else /* __i386__ */
 564
 565 /*
 566  * Stubs for the CallTo16/CallFrom16 routines on non-Intel architectures
 567  * (these will never be called but need to be present to satisfy the linker ...)
 568  */
 569
 570 /***********************************************************************
 571  *              __wine_call_from_16_regs (KERNEL32.@)
 572  */
 573 void __wine_call_from_16_regs()
 574 {
 575     assert( FALSE );
 576 }
 577
 578 DWORD WINAPI CALL32_CBClient( FARPROC proc, LPWORD args, DWORD *esi )
 579 { assert( FALSE ); }
 580
 581 DWORD WINAPI CALL32_CBClientEx( FARPROC proc, LPWORD args, DWORD *esi, INT *nArgs )
 582 { assert( FALSE ); }
 583
 584 #endif  /* __i386__ */