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 "windows.h"
   9 #include "winnt.h"
  10 #include "global.h"
  11 #include "heap.h"
  12 #include "module.h"
  13 #include "stackframe.h"
  14 #include "task.h"
  15 #include "debugstr.h"
  16 #include "debug.h"
  17
  18
  19 /***********************************************************************
  20  *           RELAY_Init
  21  */
  22 BOOL32 RELAY_Init(void)
  23 {
  24     WORD codesel;
  25     extern BOOL32 THUNK_Init(void);
  26
  27       /* Allocate the code selector for CallTo16 routines */
  28
  29     extern void CALLTO16_Start(), CALLTO16_End();
  30     extern void CALLTO16_Ret_word(), CALLTO16_Ret_long();
  31     extern void CALLTO16_Ret_eax();
  32     extern void CALL32_CBClient_Ret();
  33     extern DWORD CALLTO16_RetAddr_word;
  34     extern DWORD CALLTO16_RetAddr_long;
  35     extern DWORD CALLTO16_RetAddr_eax;
  36     extern DWORD CALL32_CBClient_RetAddr;
  37
  38     codesel = GLOBAL_CreateBlock( GMEM_FIXED, (void *)CALLTO16_Start,
  39                                    (int)CALLTO16_End - (int)CALLTO16_Start,
  40                                    0, TRUE, TRUE, FALSE, NULL );
  41     if (!codesel) return FALSE;
  42
  43       /* Patch the return addresses for CallTo16 routines */
  44
  45     CALLTO16_RetAddr_word=MAKELONG( (int)CALLTO16_Ret_word-(int)CALLTO16_Start,
  46                                     codesel );
  47     CALLTO16_RetAddr_long=MAKELONG( (int)CALLTO16_Ret_long-(int)CALLTO16_Start,
  48                                     codesel );
  49     CALLTO16_RetAddr_eax =MAKELONG( (int)CALLTO16_Ret_eax -(int)CALLTO16_Start,
  50                                     codesel );
  51     CALL32_CBClient_RetAddr =
  52         MAKELONG( (int)CALL32_CBClient_Ret -(int)CALLTO16_Start, codesel );
  53
  54     /* Create built-in modules */
  55     if (!BUILTIN_Init()) return FALSE;
  56
  57     /* Initialize thunking */
  58     return THUNK_Init();
  59 }
  60
  61
  62     /* from relay32/relay386.c */
  63     extern debug_relay_includelist;
  64     extern debug_relay_excludelist;
  65
  66 /***********************************************************************
  67  *           RELAY_DebugCallFrom16
  68  */
  69 void RELAY_DebugCallFrom16( int func_type, char *args,
  70                             void *entry_point, CONTEXT *context )
  71 {
  72     STACK16FRAME *frame;
  73     WORD ordinal;
  74     char *args16;
  75     const char *funstr;
  76     int i;
  77     /* from relay32/relay386.c */
  78     extern int RELAY_ShowDebugmsgRelay(const char *);
  79
  80     if (!TRACE_ON(relay)) return;
  81
  82     frame = CURRENT_STACK16;
  83     funstr = BUILTIN_GetEntryPoint16(frame->entry_cs,frame->entry_ip,&ordinal);
  84     if (!funstr) return; /* happens for the two snoop register relays */
  85     if (!RELAY_ShowDebugmsgRelay(funstr)) return;
  86     DPRINTF( "Call %s(",funstr);
  87     VA_START16( args16 );
  88
  89     if (func_type & 4)  /* cdecl */
  90     {
  91         while (*args)
  92         {
  93             switch(*args)
  94             {
  95             case 'w':
  96             case 's':
  97                 DPRINTF( "0x%04x", *(WORD *)args16 );
  98                 args16 += 2;
  99                 break;
 100             case 'l':
 101                 DPRINTF( "0x%08x", *(int *)args16 );
 102                 args16 += 4;
 103                 break;
 104             case 't':
 105                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 106                 if (HIWORD(*(SEGPTR *)args16))
 107                     debug_dumpstr( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 ));
 108                 args16 += 4;
 109                 break;
 110             case 'p':
 111                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 112                 args16 += 4;
 113                 break;
 114             case 'T':
 115                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 116                 if (HIWORD( *(SEGPTR *)args16 ))
 117                     debug_dumpstr( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 ));
 118                 args16 += 4;
 119                 break;
 120             }
 121             args++;
 122             if (*args) DPRINTF( "," );
 123         }
 124     }
 125     else  /* not cdecl */
 126     {
 127         /* Start with the last arg */
 128         for (i = 0; args[i]; i++)
 129         {
 130             switch(args[i])
 131             {
 132             case 'w':
 133             case 's':
 134                 args16 += 2;
 135                 break;
 136             case 'l':
 137             case 'p':
 138             case 't':
 139             case 'T':
 140                 args16 += 4;
 141                 break;
 142             }
 143         }
 144
 145         while (*args)
 146         {
 147             switch(*args)
 148             {
 149             case 'w':
 150             case 's':
 151                 args16 -= 2;
 152                 DPRINTF( "0x%04x", *(WORD *)args16 );
 153                 break;
 154             case 'l':
 155                 args16 -= 4;
 156                 DPRINTF( "0x%08x", *(int *)args16 );
 157                 break;
 158             case 't':
 159                 args16 -= 4;
 160                 DPRINTF( "0x%08x", *(int *)args16 );
 161                 if (HIWORD(*(SEGPTR *)args16))
 162                     debug_dumpstr( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 ));
 163                 break;
 164             case 'p':
 165                 args16 -= 4;
 166                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 167                 break;
 168             case 'T':
 169                 args16 -= 4;
 170                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 171                 if (HIWORD( *(SEGPTR *)args16 ))
 172                     debug_dumpstr( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 ));
 173                 break;
 174             }
 175             args++;
 176             if (*args) DPRINTF( "," );
 177         }
 178     }
 179
 180     DPRINTF( ") ret=%04x:%04x ds=%04x\n", frame->cs, frame->ip, frame->ds );
 181     VA_END16( args16 );
 182
 183     if (func_type & 2)  /* register function */
 184         DPRINTF( "     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 185                  AX_reg(context), BX_reg(context), CX_reg(context),
 186                  DX_reg(context), SI_reg(context), DI_reg(context),
 187                  (WORD)ES_reg(context), EFL_reg(context) );
 188 }
 189
 190
 191 /***********************************************************************
 192  *           RELAY_DebugCallFrom16Ret
 193  */
 194 void RELAY_DebugCallFrom16Ret( int func_type, int ret_val, CONTEXT *context)
 195 {
 196     STACK16FRAME *frame;
 197     WORD ordinal;
 198     const char *funstr;
 199     /* from relay32/relay386.c */
 200     extern int RELAY_ShowDebugmsgRelay(const char *);
 201
 202     if (!TRACE_ON(relay)) return;
 203     frame = CURRENT_STACK16;
 204     funstr = BUILTIN_GetEntryPoint16(frame->entry_cs,frame->entry_ip,&ordinal);
 205     if (!funstr) return;
 206     if (!RELAY_ShowDebugmsgRelay(funstr)) return;
 207     DPRINTF( "Ret  %s() ",funstr);
 208     switch(func_type)
 209     {
 210     case 0: /* long */
 211         DPRINTF( "retval=0x%08x ret=%04x:%04x ds=%04x\n",
 212                  ret_val, frame->cs, frame->ip, frame->ds );
 213         break;
 214     case 1: /* word */
 215         DPRINTF( "retval=0x%04x ret=%04x:%04x ds=%04x\n",
 216                  ret_val & 0xffff, frame->cs, frame->ip, frame->ds );
 217         break;
 218     case 2: /* regs */
 219         DPRINTF("retval=none ret=%04x:%04x ds=%04x\n",
 220                 (WORD)CS_reg(context), IP_reg(context), (WORD)DS_reg(context));
 221         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 222                 AX_reg(context), BX_reg(context), CX_reg(context),
 223                 DX_reg(context), SI_reg(context), DI_reg(context),
 224                 (WORD)ES_reg(context), EFL_reg(context) );
 225         break;
 226     }
 227 }
 228
 229
 230 /***********************************************************************
 231  *           RELAY_Unimplemented16
 232  *
 233  * This function is called for unimplemented 16-bit entry points (declared
 234  * as 'stub' in the spec file).
 235  */
 236 void RELAY_Unimplemented16(void)
 237 {
 238     WORD ordinal;
 239     STACK16FRAME *frame = CURRENT_STACK16;
 240     MSG("No handler for Win16 routine %s (called from %04x:%04x)\n",
 241             BUILTIN_GetEntryPoint16(frame->entry_cs,frame->entry_ip,&ordinal),
 242             frame->cs, frame->ip );
 243     ExitProcess(1);
 244 }
 245
 246
 247 /***********************************************************************
 248  *           RELAY_DebugCallTo16
 249  *
 250  * 'stack' points to the called function address on the 32-bit stack.
 251  * Stack layout:
 252  *  ...        ...
 253  * (stack+8)   arg2
 254  * (stack+4)   arg1
 255  * (stack)     func to call
 256  */
 257 void RELAY_DebugCallTo16( int* stack, int nb_args )
 258 {
 259     THDB *thdb;
 260
 261     if (!TRACE_ON(relay)) return;
 262     thdb = THREAD_Current();
 263
 264     if (nb_args == -1)  /* Register function */
 265     {
 266         CONTEXT *context = (CONTEXT *)stack[0];
 267         WORD *stack16 = (WORD *)THREAD_STACK16(thdb);
 268         DPRINTF("CallTo16(func=%04lx:%04x,ds=%04lx",
 269                 CS_reg(context), IP_reg(context), DS_reg(context) );
 270         nb_args = stack[1] / sizeof(WORD);
 271         while (nb_args--) {
 272             --stack16;
 273             DPRINTF( ",0x%04x", *stack16 );
 274         }
 275         DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(thdb->cur_stack),
 276                 OFFSETOF(thdb->cur_stack) );
 277         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x BP=%04x ES=%04x FS=%04x\n",
 278                 AX_reg(context), BX_reg(context), CX_reg(context),
 279                 DX_reg(context), SI_reg(context), DI_reg(context),
 280                 BP_reg(context), (WORD)ES_reg(context), (WORD)FS_reg(context) );
 281     }
 282     else
 283     {
 284         DPRINTF("CallTo16(func=%04x:%04x,ds=%04x",
 285                 HIWORD(stack[0]), LOWORD(stack[0]),
 286                 SELECTOROF(thdb->cur_stack) );
 287         stack++;
 288         while (nb_args--) {
 289             DPRINTF(",0x%04x", *stack );
 290             stack++;
 291         }
 292         DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(thdb->cur_stack),
 293                 OFFSETOF(thdb->cur_stack) );
 294     }
 295 }
 296
 297
 298 /***********************************************************************
 299  *           RELAY_DebugCallTo16Ret
 300  */
 301 void RELAY_DebugCallTo16Ret( int ret_val )
 302 {
 303     THDB *thdb;
 304
 305     if (!TRACE_ON(relay)) return;
 306     thdb = THREAD_Current();
 307
 308     DPRINTF("CallTo16() ss:sp=%04x:%04x retval=0x%08x\n",
 309             SELECTOROF(thdb->cur_stack), OFFSETOF(thdb->cur_stack), ret_val);
 310 }
 311
 312
 313 /**********************************************************************
 314  *           Catch    (KERNEL.55)
 315  *
 316  * Real prototype is:
 317  *   INT16 WINAPI Catch( LPCATCHBUF lpbuf );
 318  */
 319 void WINAPI Catch( CONTEXT *context )
 320 {
 321     VA_LIST16 valist;
 322     SEGPTR buf;
 323     LPCATCHBUF lpbuf;
 324
 325     VA_START16( valist );
 326     buf   = VA_ARG16( valist, SEGPTR );
 327     lpbuf = (LPCATCHBUF)PTR_SEG_TO_LIN( buf );
 328     VA_END16( valist );
 329
 330     /* Note: we don't save the current ss, as the catch buffer is */
 331     /* only 9 words long. Hopefully no one will have the silly    */
 332     /* idea to change the current stack before calling Throw()... */
 333
 334     /* Windows uses:
 335      * lpbuf[0] = ip
 336      * lpbuf[1] = cs
 337      * lpbuf[2] = sp
 338      * lpbuf[3] = bp
 339      * lpbuf[4] = si
 340      * lpbuf[5] = di
 341      * lpbuf[6] = ds
 342      * lpbuf[7] = unused
 343      * lpbuf[8] = ss
 344      */
 345
 346     lpbuf[0] = IP_reg(context);
 347     lpbuf[1] = CS_reg(context);
 348     /* Windows pushes 4 more words before saving sp */
 349     lpbuf[2] = SP_reg(context) - 4 * sizeof(WORD);
 350     lpbuf[3] = BP_reg(context);
 351     lpbuf[4] = SI_reg(context);
 352     lpbuf[5] = DI_reg(context);
 353     lpbuf[6] = DS_reg(context);
 354     lpbuf[7] = 0;
 355     lpbuf[8] = SS_reg(context);
 356     AX_reg(context) = 0;  /* Return 0 */
 357 }
 358
 359
 360 /**********************************************************************
 361  *           Throw    (KERNEL.56)
 362  *
 363  * Real prototype is:
 364  *   INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
 365  */
 366 void WINAPI Throw( CONTEXT *context )
 367 {
 368     VA_LIST16 valist;
 369     SEGPTR buf;
 370     LPCATCHBUF lpbuf;
 371     STACK16FRAME *pFrame;
 372     STACK32FRAME *frame32;
 373     THDB *thdb = THREAD_Current();
 374
 375     VA_START16( valist );
 376     AX_reg(context) = VA_ARG16( valist, WORD );  /* retval */
 377     buf    = VA_ARG16( valist, SEGPTR );
 378     lpbuf  = (LPCATCHBUF)PTR_SEG_TO_LIN( buf );
 379     VA_END16( valist );
 380
 381     /* Find the frame32 corresponding to the frame16 we are jumping to */
 382     pFrame = THREAD_STACK16( thdb );
 383     frame32 = THREAD_STACK16( thdb )->frame32;
 384     while (frame32 && frame32->frame16)
 385     {
 386         if (OFFSETOF(frame32->frame16) < OFFSETOF(thdb->cur_stack))
 387             break;  /* Something strange is going on */
 388         if (OFFSETOF(frame32->frame16) > lpbuf[2])
 389         {
 390             /* We found the right frame */
 391             pFrame->frame32 = frame32;
 392             break;
 393         }
 394         frame32 = ((STACK16FRAME *)PTR_SEG_TO_LIN(frame32->frame16))->frame32;
 395     }
 396
 397     IP_reg(context) = lpbuf[0];
 398     CS_reg(context) = lpbuf[1];
 399     SP_reg(context) = lpbuf[2] + 4 * sizeof(WORD) - sizeof(WORD) /*extra arg*/;
 400     BP_reg(context) = lpbuf[3];
 401     SI_reg(context) = lpbuf[4];
 402     DI_reg(context) = lpbuf[5];
 403     DS_reg(context) = lpbuf[6];
 404
 405     if (lpbuf[8] != SS_reg(context))
 406         ERR(relay, "Switching stack segment with Throw() not supported; expect crash now\n" );
 407
 408     if (TRACE_ON(relay))  /* Make sure we have a valid entry point address */
 409     {
 410         static FARPROC16 entryPoint = NULL;
 411
 412         if (!entryPoint)  /* Get entry point for Throw() */
 413             entryPoint = NE_GetEntryPoint( GetModuleHandle16("KERNEL"), 56 );
 414         pFrame->entry_cs = SELECTOROF(entryPoint);
 415         pFrame->entry_ip = OFFSETOF(entryPoint);
 416     }
 417 }
 418
 419
 420 /**********************************************************************
 421  *           RELAY_CallProc32W
 422  *
 423  * Helper for CallProc[Ex]32W
 424  */
 425 static DWORD RELAY_CallProc32W(int Ex)
 426 {
 427         DWORD nrofargs, argconvmask;
 428         FARPROC32 proc32;
 429         DWORD *args, ret;
 430         VA_LIST16 valist;
 431         int i;
 432         int aix;
 433         dbg_decl_str(relay, 1024);
 434
 435         VA_START16( valist );
 436         nrofargs    = VA_ARG16( valist, DWORD );
 437         argconvmask = VA_ARG16( valist, DWORD );
 438         proc32      = VA_ARG16( valist, FARPROC32 );
 439         dsprintf(relay, "CallProc32W(%ld,%ld,%p, Ex%d args[",nrofargs,argconvmask,proc32,Ex);
 440         args = (DWORD*)HEAP_xalloc( GetProcessHeap(), 0,
 441                                     sizeof(DWORD)*nrofargs );
 442         /* CallProcEx doesn't need its args reversed */
 443         for (i=0;i<nrofargs;i++) {
 444                 if (Ex) {
 445                    aix = i;
 446                 } else {
 447                    aix = nrofargs - i - 1;
 448                 }
 449                 if (argconvmask & (1<<i))
 450                 {
 451                     SEGPTR ptr = VA_ARG16( valist, SEGPTR );
 452                     args[aix] = (DWORD)PTR_SEG_TO_LIN(ptr);
 453                     dsprintf(relay,"%08lx(%p),",ptr,PTR_SEG_TO_LIN(ptr));
 454                 }
 455                 else
 456                 {
 457                     args[aix] = VA_ARG16( valist, DWORD );
 458                     dsprintf(relay,"%ld,",args[aix]);
 459                 }
 460         }
 461         dsprintf(relay,"])");
 462         VA_END16( valist );
 463
 464         if (!proc32) ret = 0;
 465         else switch (nrofargs)
 466         {
 467         case 0: ret = proc32();
 468                 break;
 469         case 1: ret = proc32(args[0]);
 470                 break;
 471         case 2: ret = proc32(args[0],args[1]);
 472                 break;
 473         case 3: ret = proc32(args[0],args[1],args[2]);
 474                 break;
 475         case 4: ret = proc32(args[0],args[1],args[2],args[3]);
 476                 break;
 477         case 5: ret = proc32(args[0],args[1],args[2],args[3],args[4]);
 478                 break;
 479         case 6: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5]);
 480                 break;
 481         case 7: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
 482                 break;
 483         case 8: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
 484                 break;
 485         case 9: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]);
 486                 break;
 487         case 10:        ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9]);
 488                 break;
 489         case 11:        ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10]);
 490                 break;
 491         default:
 492                 /* FIXME: should go up to 32  arguments */
 493                 ERR(relay,"Unsupported number of arguments %ld, please report.\n",nrofargs);
 494                 ret = 0;
 495                 break;
 496         }
 497         /* POP nrofargs DWORD arguments and 3 DWORD parameters */
 498         if (!Ex) STACK16_POP( THREAD_Current(),
 499                               (3 + nrofargs) * sizeof(DWORD) );
 500
 501         TRACE(relay,"%s - returns %08lx\n",dbg_str(relay),ret);
 502         HeapFree( GetProcessHeap(), 0, args );
 503         return ret;
 504 }
 505
 506
 507 /**********************************************************************
 508  *           CallProc32W    (KERNEL.517)
 509  */
 510 DWORD WINAPI WIN16_CallProc32W()
 511 {
 512         return RELAY_CallProc32W(0);
 513 }
 514
 515
 516 /**********************************************************************
 517 *           CallProcEx32W()   (KERNEL.518)
 518 *
 519 *      C - style linkage to CallProc32W - caller pops stack.
 520 */
 521 DWORD WINAPI WIN16_CallProcEx32W()
 522 {
 523         return RELAY_CallProc32W(TRUE);
 524 }