if1632/relay.c

   1 /*
   2  * Copyright 1993 Robert J. Amstadt
   3  * Copyright 1995 Alexandre Julliard
   4  */
   5
   6 #include <assert.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include "wine/winbase16.h"
  10 #include "winnt.h"
  11 #include "heap.h"
  12 #include "module.h"
  13 #include "stackframe.h"
  14 #include "selectors.h"
  15 #include "builtin16.h"
  16 #include "task.h"
  17 #include "syslevel.h"
  18 #include "debugtools.h"
  19 #include "main.h"
  20 #include "callback.h"
  21
  22 DEFAULT_DEBUG_CHANNEL(relay);
  23
  24 /***********************************************************************
  25  *           RELAY_Init
  26  */
  27 BOOL RELAY_Init(void)
  28 {
  29 #ifdef __i386__
  30     WORD codesel;
  31
  32       /* Allocate the code selector for CallTo16 routines */
  33
  34     extern void Call16_Ret_Start(), Call16_Ret_End();
  35     extern void CallTo16_Ret();
  36     extern void CALL32_CBClient_Ret();
  37     extern void CALL32_CBClientEx_Ret();
  38     extern SEGPTR CallTo16_RetAddr;
  39     extern SEGPTR CALL32_CBClient_RetAddr;
  40     extern SEGPTR CALL32_CBClientEx_RetAddr;
  41
  42     codesel = SELECTOR_AllocBlock( (void *)Call16_Ret_Start,
  43                                    (char *)Call16_Ret_End - (char *)Call16_Ret_Start,
  44                                    SEGMENT_CODE, TRUE, FALSE );
  45     if (!codesel) return FALSE;
  46
  47       /* Patch the return addresses for CallTo16 routines */
  48
  49     CallTo16_RetAddr =
  50         PTR_SEG_OFF_TO_SEGPTR( codesel, (char*)CallTo16_Ret - (char*)Call16_Ret_Start );
  51     CALL32_CBClient_RetAddr =
  52         PTR_SEG_OFF_TO_SEGPTR( codesel, (char*)CALL32_CBClient_Ret - (char*)Call16_Ret_Start );
  53     CALL32_CBClientEx_RetAddr =
  54         PTR_SEG_OFF_TO_SEGPTR( codesel, (char*)CALL32_CBClientEx_Ret - (char*)Call16_Ret_Start );
  55 #endif
  56
  57     /* Initialize thunking */
  58     return THUNK_Init();
  59 }
  60
  61 /*
  62  * Stubs for the CallTo16/CallFrom16 routines on non-Intel architectures
  63  * (these will never be called but need to be present to satisfy the linker ...)
  64  */
  65 #ifndef __i386__
  66 WORD CALLBACK CallTo16Word( FARPROC16 target, INT nArgs )
  67 { assert( FALSE ); }
  68
  69 LONG CALLBACK CallTo16Long( FARPROC16 target, INT nArgs )
  70 { assert( FALSE ); }
  71
  72 LONG CALLBACK CallTo16RegisterShort( const CONTEXT86 *context, INT nArgs )
  73 { assert( FALSE ); }
  74
  75 LONG CALLBACK CallTo16RegisterLong ( const CONTEXT86 *context, INT nArgs )
  76 { assert( FALSE ); }
  77
  78 WORD CallFrom16Word( void )
  79 { assert( FALSE ); }
  80
  81 LONG CallFrom16Long( void )
  82 { assert( FALSE ); }
  83
  84 void CallFrom16Register( void )
  85 { assert( FALSE ); }
  86
  87 void CallFrom16Thunk( void )
  88 { assert( FALSE ); }
  89
  90 DWORD WINAPI CALL32_CBClient( FARPROC proc, LPWORD args, DWORD *esi )
  91 { assert( FALSE ); }
  92
  93 DWORD WINAPI CALL32_CBClientEx( FARPROC proc, LPWORD args, DWORD *esi, INT *nArgs )
  94 { assert( FALSE ); }
  95 #endif
  96
  97
  98 /* from relay32/relay386.c */
  99 extern char **debug_relay_excludelist,**debug_relay_includelist;
 100
 101 /***********************************************************************
 102  *           RELAY_DebugCallFrom16
 103  */
 104 void RELAY_DebugCallFrom16( CONTEXT86 *context )
 105 {
 106     STACK16FRAME *frame;
 107     WORD ordinal;
 108     char *args16, funstr[80];
 109     const char *args;
 110     int i, usecdecl, reg_func;
 111
 112     if (!TRACE_ON(relay)) return;
 113
 114     frame = CURRENT_STACK16;
 115     args = BUILTIN_GetEntryPoint16( frame, funstr, &ordinal );
 116     if (!args) return; /* happens for the two snoop register relays */
 117     if (!RELAY_ShowDebugmsgRelay(funstr)) return;
 118     DPRINTF( "Call %s(",funstr);
 119     VA_START16( args16 );
 120
 121     usecdecl = ( *args == 'c' );
 122     args += 2;
 123     reg_func = (    memcmp( args, "regs_", 5 ) == 0
 124                  || memcmp( args, "intr_", 5 ) == 0 );
 125     args += 5;
 126
 127     if (usecdecl)
 128     {
 129         while (*args)
 130         {
 131             switch(*args)
 132             {
 133             case 'w':
 134             case 's':
 135                 DPRINTF( "0x%04x", *(WORD *)args16 );
 136                 args16 += 2;
 137                 break;
 138             case 'l':
 139                 DPRINTF( "0x%08x", *(int *)args16 );
 140                 args16 += 4;
 141                 break;
 142             case 'p':
 143                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 144                 args16 += 4;
 145                 break;
 146             case 't':
 147             case 'T':
 148                 DPRINTF( "%04x:%04x %s", *(WORD *)(args16+2), *(WORD *)args16,
 149                          debugres_a( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 )) );
 150                 args16 += 4;
 151                 break;
 152             }
 153             args++;
 154             if (*args) DPRINTF( "," );
 155         }
 156     }
 157     else  /* not cdecl */
 158     {
 159         /* Start with the last arg */
 160         for (i = 0; args[i]; i++)
 161         {
 162             switch(args[i])
 163             {
 164             case 'w':
 165             case 's':
 166                 args16 += 2;
 167                 break;
 168             case 'l':
 169             case 'p':
 170             case 't':
 171             case 'T':
 172                 args16 += 4;
 173                 break;
 174             }
 175         }
 176
 177         while (*args)
 178         {
 179             switch(*args)
 180             {
 181             case 'w':
 182             case 's':
 183                 args16 -= 2;
 184                 DPRINTF( "0x%04x", *(WORD *)args16 );
 185                 break;
 186             case 'l':
 187                 args16 -= 4;
 188                 DPRINTF( "0x%08x", *(int *)args16 );
 189                 break;
 190             case 't':
 191                 args16 -= 4;
 192                 DPRINTF( "0x%08x %s", *(int *)args16,
 193                          debugres_a( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 )));
 194                 break;
 195             case 'p':
 196                 args16 -= 4;
 197                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 198                 break;
 199             case 'T':
 200                 args16 -= 4;
 201                 DPRINTF( "%04x:%04x %s", *(WORD *)(args16+2), *(WORD *)args16,
 202                          debugres_a( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 )));
 203                 break;
 204             }
 205             args++;
 206             if (*args) DPRINTF( "," );
 207         }
 208     }
 209
 210     DPRINTF( ") ret=%04x:%04x ds=%04x\n", frame->cs, frame->ip, frame->ds );
 211     VA_END16( args16 );
 212
 213     if (reg_func)
 214         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 215                 AX_reg(context), BX_reg(context), CX_reg(context),
 216                 DX_reg(context), SI_reg(context), DI_reg(context),
 217                 (WORD)ES_reg(context), EFL_reg(context) );
 218
 219     SYSLEVEL_CheckNotLevel( 2 );
 220 }
 221
 222
 223 /***********************************************************************
 224  *           RELAY_DebugCallFrom16Ret
 225  */
 226 void RELAY_DebugCallFrom16Ret( CONTEXT86 *context, int ret_val )
 227 {
 228     STACK16FRAME *frame;
 229     WORD ordinal;
 230     char funstr[80];
 231     const char *args;
 232
 233     if (!TRACE_ON(relay)) return;
 234     frame = CURRENT_STACK16;
 235     args = BUILTIN_GetEntryPoint16( frame, funstr, &ordinal );
 236     if (!args) return;
 237     if (!RELAY_ShowDebugmsgRelay(funstr)) return;
 238     DPRINTF( "Ret  %s() ",funstr);
 239
 240     if ( memcmp( args+2, "long_", 5 ) == 0 )
 241     {
 242         DPRINTF( "retval=0x%08x ret=%04x:%04x ds=%04x\n",
 243                  ret_val, frame->cs, frame->ip, frame->ds );
 244     }
 245     else if ( memcmp( args+2, "word_", 5 ) == 0 )
 246     {
 247         DPRINTF( "retval=0x%04x ret=%04x:%04x ds=%04x\n",
 248                  ret_val & 0xffff, frame->cs, frame->ip, frame->ds );
 249     }
 250     else if (    memcmp( args+2, "regs_", 5 ) == 0
 251               || memcmp( args+2, "intr_", 5 ) == 0 )
 252     {
 253         DPRINTF("retval=none ret=%04x:%04x ds=%04x\n",
 254                 (WORD)CS_reg(context), LOWORD(EIP_reg(context)), (WORD)DS_reg(context));
 255         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 256                 AX_reg(context), BX_reg(context), CX_reg(context),
 257                 DX_reg(context), SI_reg(context), DI_reg(context),
 258                 (WORD)ES_reg(context), EFL_reg(context) );
 259     }
 260
 261     SYSLEVEL_CheckNotLevel( 2 );
 262 }
 263
 264
 265 /***********************************************************************
 266  *           RELAY_Unimplemented16
 267  *
 268  * This function is called for unimplemented 16-bit entry points (declared
 269  * as 'stub' in the spec file).
 270  */
 271 void RELAY_Unimplemented16(void)
 272 {
 273     WORD ordinal;
 274     char name[80];
 275     STACK16FRAME *frame = CURRENT_STACK16;
 276     BUILTIN_GetEntryPoint16( frame, name, &ordinal );
 277     MESSAGE("No handler for Win16 routine %s (called from %04x:%04x)\n",
 278             name, frame->cs, frame->ip );
 279     ExitProcess(1);
 280 }
 281
 282
 283 /***********************************************************************
 284  *           RELAY_DebugCallTo16
 285  *
 286  * 'target' contains either the function to call (normal CallTo16)
 287  * or a pointer to the CONTEXT86 struct (register CallTo16).
 288  * 'nb_args' is the number of argument bytes on the 16-bit stack;
 289  * 'reg_func' specifies whether we have a register CallTo16 or not.
 290  */
 291 void RELAY_DebugCallTo16( LPVOID target, int nb_args, BOOL reg_func )
 292 {
 293     WORD *stack16;
 294     TEB *teb;
 295
 296     if (!TRACE_ON(relay)) return;
 297     teb = NtCurrentTeb();
 298     stack16 = (WORD *)THREAD_STACK16(teb);
 299
 300     nb_args /= sizeof(WORD);
 301
 302     if ( reg_func )
 303     {
 304         CONTEXT86 *context = (CONTEXT86 *)target;
 305
 306         DPRINTF("CallTo16(func=%04lx:%04x,ds=%04lx",
 307                 CS_reg(context), LOWORD(EIP_reg(context)), DS_reg(context) );
 308         while (nb_args--) DPRINTF( ",0x%04x", *--stack16 );
 309         DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(teb->cur_stack),
 310                 OFFSETOF(teb->cur_stack) );
 311         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x BP=%04x ES=%04x FS=%04x\n",
 312                 AX_reg(context), BX_reg(context), CX_reg(context),
 313                 DX_reg(context), SI_reg(context), DI_reg(context),
 314                 BP_reg(context), (WORD)ES_reg(context), (WORD)FS_reg(context) );
 315     }
 316     else
 317     {
 318         DPRINTF("CallTo16(func=%04x:%04x,ds=%04x",
 319                 HIWORD(target), LOWORD(target), SELECTOROF(teb->cur_stack) );
 320         while (nb_args--) DPRINTF( ",0x%04x", *--stack16 );
 321         DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(teb->cur_stack),
 322                 OFFSETOF(teb->cur_stack) );
 323     }
 324
 325     SYSLEVEL_CheckNotLevel( 2 );
 326 }
 327
 328
 329 /***********************************************************************
 330  *           RELAY_DebugCallTo16Ret
 331  */
 332 void RELAY_DebugCallTo16Ret( int ret_val )
 333 {
 334     if (!TRACE_ON(relay)) return;
 335
 336     DPRINTF("CallTo16() ss:sp=%04x:%04x retval=0x%08x\n",
 337             SELECTOROF(NtCurrentTeb()->cur_stack),
 338             OFFSETOF(NtCurrentTeb()->cur_stack), ret_val);
 339     SYSLEVEL_CheckNotLevel( 2 );
 340 }
 341
 342
 343 /**********************************************************************
 344  *           Catch    (KERNEL.55)
 345  *
 346  * Real prototype is:
 347  *   INT16 WINAPI Catch( LPCATCHBUF lpbuf );
 348  */
 349 void WINAPI Catch16( LPCATCHBUF lpbuf, CONTEXT86 *context )
 350 {
 351     /* Note: we don't save the current ss, as the catch buffer is */
 352     /* only 9 words long. Hopefully no one will have the silly    */
 353     /* idea to change the current stack before calling Throw()... */
 354
 355     /* Windows uses:
 356      * lpbuf[0] = ip
 357      * lpbuf[1] = cs
 358      * lpbuf[2] = sp
 359      * lpbuf[3] = bp
 360      * lpbuf[4] = si
 361      * lpbuf[5] = di
 362      * lpbuf[6] = ds
 363      * lpbuf[7] = unused
 364      * lpbuf[8] = ss
 365      */
 366
 367     lpbuf[0] = LOWORD(EIP_reg(context));
 368     lpbuf[1] = CS_reg(context);
 369     /* Windows pushes 4 more words before saving sp */
 370     lpbuf[2] = LOWORD(ESP_reg(context)) - 4 * sizeof(WORD);
 371     lpbuf[3] = LOWORD(EBP_reg(context));
 372     lpbuf[4] = LOWORD(ESI_reg(context));
 373     lpbuf[5] = LOWORD(EDI_reg(context));
 374     lpbuf[6] = DS_reg(context);
 375     lpbuf[7] = 0;
 376     lpbuf[8] = SS_reg(context);
 377     AX_reg(context) = 0;  /* Return 0 */
 378 }
 379
 380
 381 /**********************************************************************
 382  *           Throw    (KERNEL.56)
 383  *
 384  * Real prototype is:
 385  *   INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
 386  */
 387 void WINAPI Throw16( LPCATCHBUF lpbuf, INT16 retval, CONTEXT86 *context )
 388 {
 389     STACK16FRAME *pFrame;
 390     STACK32FRAME *frame32;
 391     TEB *teb = NtCurrentTeb();
 392
 393     AX_reg(context) = retval;
 394
 395     /* Find the frame32 corresponding to the frame16 we are jumping to */
 396     pFrame = THREAD_STACK16(teb);
 397     frame32 = pFrame->frame32;
 398     while (frame32 && frame32->frame16)
 399     {
 400         if (OFFSETOF(frame32->frame16) < OFFSETOF(teb->cur_stack))
 401             break;  /* Something strange is going on */
 402         if (OFFSETOF(frame32->frame16) > lpbuf[2])
 403         {
 404             /* We found the right frame */
 405             pFrame->frame32 = frame32;
 406             break;
 407         }
 408         frame32 = ((STACK16FRAME *)PTR_SEG_TO_LIN(frame32->frame16))->frame32;
 409     }
 410
 411     EIP_reg(context) = lpbuf[0];
 412     CS_reg(context)  = lpbuf[1];
 413     ESP_reg(context) = lpbuf[2] + 4 * sizeof(WORD) - sizeof(WORD) /*extra arg*/;
 414     EBP_reg(context) = lpbuf[3];
 415     ESI_reg(context) = lpbuf[4];
 416     EDI_reg(context) = lpbuf[5];
 417     DS_reg(context)  = lpbuf[6];
 418
 419     if (lpbuf[8] != SS_reg(context))
 420         ERR("Switching stack segment with Throw() not supported; expect crash now\n" );
 421 }
 422