if1632/relay.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 <assert.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <stdio.h>
  24
  25 #include "wine/winbase16.h"
  26 #include "winnt.h"
  27 #include "module.h"
  28 #include "stackframe.h"
  29 #include "selectors.h"
  30 #include "builtin16.h"
  31 #include "syslevel.h"
  32 #include "wine/library.h"
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(relay);
  36
  37 /***********************************************************************
  38  *           RELAY_Init
  39  */
  40 BOOL RELAY_Init(void)
  41 {
  42 #ifdef __i386__
  43     WORD codesel;
  44
  45       /* Allocate the code selector for CallTo16 routines */
  46
  47     extern void Call16_Ret_Start(), Call16_Ret_End();
  48     extern void CallTo16_Ret();
  49     extern void CALL32_CBClient_Ret();
  50     extern void CALL32_CBClientEx_Ret();
  51     extern SEGPTR CallTo16_RetAddr;
  52     extern DWORD CallTo16_DataSelector;
  53     extern SEGPTR CALL32_CBClient_RetAddr;
  54     extern SEGPTR CALL32_CBClientEx_RetAddr;
  55
  56     codesel = SELECTOR_AllocBlock( (void *)Call16_Ret_Start,
  57                                    (char *)Call16_Ret_End - (char *)Call16_Ret_Start,
  58                                    WINE_LDT_FLAGS_CODE | WINE_LDT_FLAGS_32BIT );
  59     if (!codesel) return FALSE;
  60
  61       /* Patch the return addresses for CallTo16 routines */
  62
  63     CallTo16_DataSelector = wine_get_ds();
  64     CallTo16_RetAddr =
  65         MAKESEGPTR( codesel, (char*)CallTo16_Ret - (char*)Call16_Ret_Start );
  66     CALL32_CBClient_RetAddr =
  67         MAKESEGPTR( codesel, (char*)CALL32_CBClient_Ret - (char*)Call16_Ret_Start );
  68     CALL32_CBClientEx_RetAddr =
  69         MAKESEGPTR( codesel, (char*)CALL32_CBClientEx_Ret - (char*)Call16_Ret_Start );
  70 #endif
  71     return TRUE;
  72 }
  73
  74 /*
  75  * Stubs for the CallTo16/CallFrom16 routines on non-Intel architectures
  76  * (these will never be called but need to be present to satisfy the linker ...)
  77  */
  78 #ifndef __i386__
  79 /***********************************************************************
  80  *              wine_call_to_16_word (KERNEL32.@)
  81  */
  82 WORD WINAPI wine_call_to_16_word( FARPROC16 target, INT nArgs )
  83 {
  84     assert( FALSE );
  85 }
  86
  87 /***********************************************************************
  88  *              wine_call_to_16_long (KERNEL32.@)
  89  */
  90 LONG WINAPI wine_call_to_16_long( FARPROC16 target, INT nArgs )
  91 {
  92     assert( FALSE );
  93 }
  94
  95 /***********************************************************************
  96  *              wine_call_to_16_regs_short (KERNEL32.@)
  97  */
  98 void WINAPI wine_call_to_16_regs_short( CONTEXT86 *context, INT nArgs )
  99 {
 100     assert( FALSE );
 101 }
 102
 103 /***********************************************************************
 104  *              wine_call_to_16_regs_long (KERNEL32.@)
 105  */
 106 void WINAPI wine_call_to_16_regs_long ( CONTEXT86 *context, INT nArgs )
 107 {
 108     assert( FALSE );
 109 }
 110
 111 /***********************************************************************
 112  *              __wine_call_from_16_word (KERNEL32.@)
 113  */
 114 WORD __wine_call_from_16_word()
 115 {
 116     assert( FALSE );
 117 }
 118
 119 /***********************************************************************
 120  *              __wine_call_from_16_long (KERNEL32.@)
 121  */
 122 LONG __wine_call_from_16_long()
 123 {
 124     assert( FALSE );
 125 }
 126
 127 /***********************************************************************
 128  *              __wine_call_from_16_regs (KERNEL32.@)
 129  */
 130 void __wine_call_from_16_regs()
 131 {
 132     assert( FALSE );
 133 }
 134
 135 DWORD WINAPI CALL32_CBClient( FARPROC proc, LPWORD args, DWORD *esi )
 136 { assert( FALSE ); }
 137
 138 DWORD WINAPI CALL32_CBClientEx( FARPROC proc, LPWORD args, DWORD *esi, INT *nArgs )
 139 { assert( FALSE ); }
 140 #endif
 141
 142
 143 /* from relay32/relay386.c */
 144 extern char **debug_relay_excludelist,**debug_relay_includelist;
 145 extern int RELAY_ShowDebugmsgRelay(const char *func);
 146
 147
 148 /***********************************************************************
 149  *           get_entry_point
 150  *
 151  * Return the ordinal, name, and type info corresponding to a CS:IP address.
 152  */
 153 static const CALLFROM16 *get_entry_point( STACK16FRAME *frame, LPSTR name, WORD *pOrd )
 154 {
 155     WORD i, max_offset;
 156     register BYTE *p;
 157     NE_MODULE *pModule;
 158     ET_BUNDLE *bundle;
 159     ET_ENTRY *entry;
 160
 161     if (!(pModule = NE_GetPtr( FarGetOwner16( GlobalHandle16( frame->module_cs ) ))))
 162         return NULL;
 163
 164     max_offset = 0;
 165     *pOrd = 0;
 166     bundle = (ET_BUNDLE *)((BYTE *)pModule + pModule->entry_table);
 167     do
 168     {
 169         entry = (ET_ENTRY *)((BYTE *)bundle+6);
 170         for (i = bundle->first + 1; i <= bundle->last; i++)
 171         {
 172             if ((entry->offs < frame->entry_ip)
 173             && (entry->segnum == 1) /* code segment ? */
 174             && (entry->offs >= max_offset))
 175             {
 176                 max_offset = entry->offs;
 177                 *pOrd = i;
 178             }
 179             entry++;
 180         }
 181     } while ( (bundle->next)
 182            && (bundle = (ET_BUNDLE *)((BYTE *)pModule+bundle->next)));
 183
 184     /* Search for the name in the resident names table */
 185     /* (built-in modules have no non-resident table)   */
 186
 187     p = (BYTE *)pModule + pModule->name_table;
 188     while (*p)
 189     {
 190         p += *p + 1 + sizeof(WORD);
 191         if (*(WORD *)(p + *p + 1) == *pOrd) break;
 192     }
 193
 194     sprintf( name, "%.*s.%d: %.*s",
 195              *((BYTE *)pModule + pModule->name_table),
 196              (char *)pModule + pModule->name_table + 1,
 197              *pOrd, *p, (char *)(p + 1) );
 198
 199     /* Retrieve entry point call structure */
 200     p = MapSL( MAKESEGPTR( frame->module_cs, frame->callfrom_ip ) );
 201     /* p now points to lret, get the start of CALLFROM16 structure */
 202     return (CALLFROM16 *)(p - (BYTE *)&((CALLFROM16 *)0)->lret);
 203 }
 204
 205
 206 /***********************************************************************
 207  *           RELAY_DebugCallFrom16
 208  */
 209 void RELAY_DebugCallFrom16( CONTEXT86 *context )
 210 {
 211     STACK16FRAME *frame;
 212     WORD ordinal;
 213     char *args16, funstr[80];
 214     const CALLFROM16 *call;
 215     int i;
 216
 217     if (!TRACE_ON(relay)) return;
 218
 219     frame = CURRENT_STACK16;
 220     call = get_entry_point( frame, funstr, &ordinal );
 221     if (!call) return; /* happens for the two snoop register relays */
 222     if (!RELAY_ShowDebugmsgRelay(funstr)) return;
 223     DPRINTF( "%08lx:Call %s(",GetCurrentThreadId(),funstr);
 224     VA_START16( args16 );
 225
 226     if (call->lret == 0xcb66)  /* cdecl */
 227     {
 228         for (i = 0; i < 20; i++)
 229         {
 230             int type = (call->arg_types[i / 10] >> (3 * (i % 10))) & 7;
 231
 232             if (type == ARG_NONE) break;
 233             if (i) DPRINTF( "," );
 234             switch(type)
 235             {
 236             case ARG_WORD:
 237             case ARG_SWORD:
 238                 DPRINTF( "%04x", *(WORD *)args16 );
 239                 args16 += sizeof(WORD);
 240                 break;
 241             case ARG_LONG:
 242                 DPRINTF( "%08x", *(int *)args16 );
 243                 args16 += sizeof(int);
 244                 break;
 245             case ARG_PTR:
 246                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 247                 args16 += sizeof(SEGPTR);
 248                 break;
 249             case ARG_STR:
 250                 DPRINTF( "%08x %s", *(int *)args16,
 251                          debugstr_a( MapSL(*(SEGPTR *)args16 )));
 252                 args16 += sizeof(int);
 253                 break;
 254             case ARG_SEGSTR:
 255                 DPRINTF( "%04x:%04x %s", *(WORD *)(args16+2), *(WORD *)args16,
 256                          debugstr_a( MapSL(*(SEGPTR *)args16 )) );
 257                 args16 += sizeof(SEGPTR);
 258                 break;
 259             default:
 260                 break;
 261             }
 262         }
 263     }
 264     else  /* not cdecl */
 265     {
 266         /* Start with the last arg */
 267         args16 += call->nArgs;
 268         for (i = 0; i < 20; i++)
 269         {
 270             int type = (call->arg_types[i / 10] >> (3 * (i % 10))) & 7;
 271
 272             if (type == ARG_NONE) break;
 273             if (i) DPRINTF( "," );
 274             switch(type)
 275             {
 276             case ARG_WORD:
 277             case ARG_SWORD:
 278                 args16 -= sizeof(WORD);
 279                 DPRINTF( "%04x", *(WORD *)args16 );
 280                 break;
 281             case ARG_LONG:
 282                 args16 -= sizeof(int);
 283                 DPRINTF( "%08x", *(int *)args16 );
 284                 break;
 285             case ARG_PTR:
 286                 args16 -= sizeof(SEGPTR);
 287                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 288                 break;
 289             case ARG_STR:
 290                 args16 -= sizeof(int);
 291                 DPRINTF( "%08x %s", *(int *)args16,
 292                          debugstr_a( MapSL(*(SEGPTR *)args16 )));
 293                 break;
 294             case ARG_SEGSTR:
 295                 args16 -= sizeof(SEGPTR);
 296                 DPRINTF( "%04x:%04x %s", *(WORD *)(args16+2), *(WORD *)args16,
 297                          debugstr_a( MapSL(*(SEGPTR *)args16 )) );
 298                 break;
 299             default:
 300                 break;
 301             }
 302         }
 303     }
 304
 305     DPRINTF( ") ret=%04x:%04x ds=%04x\n", frame->cs, frame->ip, frame->ds );
 306     VA_END16( args16 );
 307
 308     if (call->arg_types[0] & ARG_REGISTER)
 309         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 310                 AX_reg(context), BX_reg(context), CX_reg(context),
 311                 DX_reg(context), SI_reg(context), DI_reg(context),
 312                 (WORD)context->SegEs, context->EFlags );
 313
 314     SYSLEVEL_CheckNotLevel( 2 );
 315 }
 316
 317
 318 /***********************************************************************
 319  *           RELAY_DebugCallFrom16Ret
 320  */
 321 void RELAY_DebugCallFrom16Ret( CONTEXT86 *context, int ret_val )
 322 {
 323     STACK16FRAME *frame;
 324     WORD ordinal;
 325     char funstr[80];
 326     const CALLFROM16 *call;
 327
 328     if (!TRACE_ON(relay)) return;
 329     frame = CURRENT_STACK16;
 330     call = get_entry_point( frame, funstr, &ordinal );
 331     if (!call) return;
 332     if (!RELAY_ShowDebugmsgRelay(funstr)) return;
 333     DPRINTF( "%08lx:Ret  %s() ",GetCurrentThreadId(),funstr);
 334
 335     if (call->arg_types[0] & ARG_REGISTER)
 336     {
 337         DPRINTF("retval=none ret=%04x:%04x ds=%04x\n",
 338                 (WORD)context->SegCs, LOWORD(context->Eip), (WORD)context->SegDs);
 339         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 340                 AX_reg(context), BX_reg(context), CX_reg(context),
 341                 DX_reg(context), SI_reg(context), DI_reg(context),
 342                 (WORD)context->SegEs, context->EFlags );
 343     }
 344     else if (call->arg_types[0] & ARG_RET16)
 345     {
 346         DPRINTF( "retval=%04x ret=%04x:%04x ds=%04x\n",
 347                  ret_val & 0xffff, frame->cs, frame->ip, frame->ds );
 348     }
 349     else
 350     {
 351         DPRINTF( "retval=%08x ret=%04x:%04x ds=%04x\n",
 352                  ret_val, frame->cs, frame->ip, frame->ds );
 353     }
 354     SYSLEVEL_CheckNotLevel( 2 );
 355 }
 356
 357
 358 /***********************************************************************
 359  *           RELAY_DebugCallTo16
 360  *
 361  * 'target' contains either the function to call (normal CallTo16)
 362  * or a pointer to the CONTEXT86 struct (register CallTo16).
 363  * 'nb_args' is the number of argument bytes on the 16-bit stack;
 364  * 'reg_func' specifies whether we have a register CallTo16 or not.
 365  */
 366 void RELAY_DebugCallTo16( LPVOID target, int nb_args, BOOL reg_func )
 367 {
 368     WORD *stack16;
 369     TEB *teb;
 370
 371     if (!TRACE_ON(relay)) return;
 372     teb = NtCurrentTeb();
 373     stack16 = (WORD *)THREAD_STACK16(teb);
 374
 375     nb_args /= sizeof(WORD);
 376
 377     if ( reg_func )
 378     {
 379         CONTEXT86 *context = (CONTEXT86 *)target;
 380
 381         DPRINTF("%08lx:CallTo16(func=%04lx:%04x,ds=%04lx",
 382                 GetCurrentThreadId(),
 383                 context->SegCs, LOWORD(context->Eip), context->SegDs );
 384         while (nb_args--) DPRINTF( ",%04x", *--stack16 );
 385         DPRINTF(") ss:sp=%04x:%04x", SELECTOROF(teb->cur_stack),
 386                 OFFSETOF(teb->cur_stack) );
 387         DPRINTF(" ax=%04x bx=%04x cx=%04x dx=%04x si=%04x di=%04x bp=%04x es=%04x fs=%04x\n",
 388                 AX_reg(context), BX_reg(context), CX_reg(context),
 389                 DX_reg(context), SI_reg(context), DI_reg(context),
 390                 BP_reg(context), (WORD)context->SegEs, (WORD)context->SegFs );
 391     }
 392     else
 393     {
 394         DPRINTF("%08lx:CallTo16(func=%04x:%04x,ds=%04x",
 395                 GetCurrentThreadId(),
 396                 HIWORD(target), LOWORD(target), SELECTOROF(teb->cur_stack) );
 397         while (nb_args--) DPRINTF( ",%04x", *--stack16 );
 398         DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(teb->cur_stack),
 399                 OFFSETOF(teb->cur_stack) );
 400     }
 401
 402     SYSLEVEL_CheckNotLevel( 2 );
 403 }
 404
 405
 406 /***********************************************************************
 407  *           RELAY_DebugCallTo16Ret
 408  */
 409 void RELAY_DebugCallTo16Ret( BOOL reg_func, int ret_val )
 410 {
 411     if (!TRACE_ON(relay)) return;
 412
 413     if (!reg_func)
 414     {
 415         DPRINTF("%08lx:RetFrom16() ss:sp=%04x:%04x retval=%08x\n",
 416                 GetCurrentThreadId(),
 417                 SELECTOROF(NtCurrentTeb()->cur_stack),
 418                 OFFSETOF(NtCurrentTeb()->cur_stack), ret_val);
 419     }
 420     else
 421     {
 422         CONTEXT86 *context = (CONTEXT86 *)ret_val;
 423
 424         DPRINTF("%08lx:RetFrom16() ss:sp=%04x:%04x ",
 425                 GetCurrentThreadId(),
 426                 SELECTOROF(NtCurrentTeb()->cur_stack),
 427                 OFFSETOF(NtCurrentTeb()->cur_stack));
 428         DPRINTF(" ax=%04x bx=%04x cx=%04x dx=%04x bp=%04x sp=%04x\n",
 429                 AX_reg(context), BX_reg(context), CX_reg(context),
 430                 DX_reg(context), BP_reg(context), LOWORD(context->Esp));
 431     }
 432
 433     SYSLEVEL_CheckNotLevel( 2 );
 434 }