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 "global.h"
  12 #include "heap.h"
  13 #include "module.h"
  14 #include "stackframe.h"
  15 #include "task.h"
  16 #include "debugstr.h"
  17 #include "debug.h"
  18 #include "main.h"
  19
  20 DEFAULT_DEBUG_CHANNEL(relay)
  21
  22
  23 /***********************************************************************
  24  *           RELAY_Init
  25  */
  26 BOOL RELAY_Init(void)
  27 {
  28     WORD codesel;
  29
  30       /* Allocate the code selector for CallTo16 routines */
  31
  32     extern void CALLTO16_Start(), CALLTO16_End();
  33     extern void CALLTO16_Ret_word(), CALLTO16_Ret_long();
  34     extern void CALLTO16_Ret_eax();
  35     extern void CALL32_CBClient_Ret();
  36     extern void CALL32_CBClientEx_Ret();
  37     extern DWORD CALLTO16_RetAddr_word;
  38     extern DWORD CALLTO16_RetAddr_long;
  39     extern DWORD CALLTO16_RetAddr_eax;
  40     extern DWORD CALL32_CBClient_RetAddr;
  41     extern DWORD CALL32_CBClientEx_RetAddr;
  42
  43     codesel = GLOBAL_CreateBlock( GMEM_FIXED, (void *)CALLTO16_Start,
  44                                    (int)CALLTO16_End - (int)CALLTO16_Start,
  45                                    0, TRUE, TRUE, FALSE, NULL );
  46     if (!codesel) return FALSE;
  47
  48       /* Patch the return addresses for CallTo16 routines */
  49
  50     CALLTO16_RetAddr_word=MAKELONG( (int)CALLTO16_Ret_word-(int)CALLTO16_Start,
  51                                     codesel );
  52     CALLTO16_RetAddr_long=MAKELONG( (int)CALLTO16_Ret_long-(int)CALLTO16_Start,
  53                                     codesel );
  54     CALLTO16_RetAddr_eax =MAKELONG( (int)CALLTO16_Ret_eax -(int)CALLTO16_Start,
  55                                     codesel );
  56     CALL32_CBClient_RetAddr =
  57         MAKELONG( (int)CALL32_CBClient_Ret -(int)CALLTO16_Start, codesel );
  58     CALL32_CBClientEx_RetAddr =
  59         MAKELONG( (int)CALL32_CBClientEx_Ret -(int)CALLTO16_Start, codesel );
  60
  61     /* Create built-in modules */
  62     if (!BUILTIN_Init()) return FALSE;
  63
  64     /* Initialize thunking */
  65     return THUNK_Init();
  66 }
  67
  68
  69 /* from relay32/relay386.c */
  70 extern char **debug_relay_excludelist,**debug_relay_includelist;
  71
  72 /***********************************************************************
  73  *           RELAY_DebugCallFrom16
  74  */
  75 void RELAY_DebugCallFrom16( int func_type, char *args,
  76                             void *entry_point, CONTEXT *context )
  77 {
  78     STACK16FRAME *frame;
  79     WORD ordinal;
  80     char *args16;
  81     const char *funstr;
  82     int i;
  83
  84     if (!TRACE_ON(relay)) return;
  85
  86     frame = CURRENT_STACK16;
  87     funstr = BUILTIN_GetEntryPoint16(frame->entry_cs,frame->entry_ip,&ordinal);
  88     if (!funstr) return; /* happens for the two snoop register relays */
  89     if (!RELAY_ShowDebugmsgRelay(funstr)) return;
  90     DPRINTF( "Call %s(",funstr);
  91     VA_START16( args16 );
  92
  93     if (func_type & 4)  /* cdecl */
  94     {
  95         while (*args)
  96         {
  97             switch(*args)
  98             {
  99             case 'w':
 100             case 's':
 101                 DPRINTF( "0x%04x", *(WORD *)args16 );
 102                 args16 += 2;
 103                 break;
 104             case 'l':
 105                 DPRINTF( "0x%08x", *(int *)args16 );
 106                 args16 += 4;
 107                 break;
 108             case 't':
 109                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 110                 if (HIWORD(*(SEGPTR *)args16))
 111                     debug_dumpstr( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 ));
 112                 args16 += 4;
 113                 break;
 114             case 'p':
 115                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 116                 args16 += 4;
 117                 break;
 118             case 'T':
 119                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 120                 if (HIWORD( *(SEGPTR *)args16 ))
 121                     debug_dumpstr( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 ));
 122                 args16 += 4;
 123                 break;
 124             }
 125             args++;
 126             if (*args) DPRINTF( "," );
 127         }
 128     }
 129     else  /* not cdecl */
 130     {
 131         /* Start with the last arg */
 132         for (i = 0; args[i]; i++)
 133         {
 134             switch(args[i])
 135             {
 136             case 'w':
 137             case 's':
 138                 args16 += 2;
 139                 break;
 140             case 'l':
 141             case 'p':
 142             case 't':
 143             case 'T':
 144                 args16 += 4;
 145                 break;
 146             }
 147         }
 148
 149         while (*args)
 150         {
 151             switch(*args)
 152             {
 153             case 'w':
 154             case 's':
 155                 args16 -= 2;
 156                 DPRINTF( "0x%04x", *(WORD *)args16 );
 157                 break;
 158             case 'l':
 159                 args16 -= 4;
 160                 DPRINTF( "0x%08x", *(int *)args16 );
 161                 break;
 162             case 't':
 163                 args16 -= 4;
 164                 DPRINTF( "0x%08x", *(int *)args16 );
 165                 if (HIWORD(*(SEGPTR *)args16))
 166                     debug_dumpstr( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 ));
 167                 break;
 168             case 'p':
 169                 args16 -= 4;
 170                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 171                 break;
 172             case 'T':
 173                 args16 -= 4;
 174                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 175                 if (HIWORD( *(SEGPTR *)args16 ))
 176                     debug_dumpstr( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 ));
 177                 break;
 178             }
 179             args++;
 180             if (*args) DPRINTF( "," );
 181         }
 182     }
 183
 184     DPRINTF( ") ret=%04x:%04x ds=%04x\n", frame->cs, frame->ip, frame->ds );
 185     VA_END16( args16 );
 186
 187     if (func_type & 2)  /* register function */
 188         DPRINTF( "     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 189                  AX_reg(context), BX_reg(context), CX_reg(context),
 190                  DX_reg(context), SI_reg(context), DI_reg(context),
 191                  (WORD)ES_reg(context), EFL_reg(context) );
 192 }
 193
 194
 195 /***********************************************************************
 196  *           RELAY_DebugCallFrom16Ret
 197  */
 198 void RELAY_DebugCallFrom16Ret( int func_type, int ret_val, CONTEXT *context)
 199 {
 200     STACK16FRAME *frame;
 201     WORD ordinal;
 202     const char *funstr;
 203
 204     if (!TRACE_ON(relay)) return;
 205     frame = CURRENT_STACK16;
 206     funstr = BUILTIN_GetEntryPoint16(frame->entry_cs,frame->entry_ip,&ordinal);
 207     if (!funstr) return;
 208     if (!RELAY_ShowDebugmsgRelay(funstr)) return;
 209     DPRINTF( "Ret  %s() ",funstr);
 210     switch(func_type)
 211     {
 212     case 0: /* long */
 213         DPRINTF( "retval=0x%08x ret=%04x:%04x ds=%04x\n",
 214                  ret_val, frame->cs, frame->ip, frame->ds );
 215         break;
 216     case 1: /* word */
 217         DPRINTF( "retval=0x%04x ret=%04x:%04x ds=%04x\n",
 218                  ret_val & 0xffff, frame->cs, frame->ip, frame->ds );
 219         break;
 220     case 2: /* regs */
 221         DPRINTF("retval=none ret=%04x:%04x ds=%04x\n",
 222                 (WORD)CS_reg(context), IP_reg(context), (WORD)DS_reg(context));
 223         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 224                 AX_reg(context), BX_reg(context), CX_reg(context),
 225                 DX_reg(context), SI_reg(context), DI_reg(context),
 226                 (WORD)ES_reg(context), EFL_reg(context) );
 227         break;
 228     }
 229 }
 230
 231
 232 /***********************************************************************
 233  *           RELAY_Unimplemented16
 234  *
 235  * This function is called for unimplemented 16-bit entry points (declared
 236  * as 'stub' in the spec file).
 237  */
 238 void RELAY_Unimplemented16(void)
 239 {
 240     WORD ordinal;
 241     STACK16FRAME *frame = CURRENT_STACK16;
 242     MSG("No handler for Win16 routine %s (called from %04x:%04x)\n",
 243             BUILTIN_GetEntryPoint16(frame->entry_cs,frame->entry_ip,&ordinal),
 244             frame->cs, frame->ip );
 245     ExitProcess(1);
 246 }
 247
 248
 249 /***********************************************************************
 250  *           RELAY_DebugCallTo16
 251  *
 252  * 'stack' points to the called function address on the 32-bit stack.
 253  * Stack layout:
 254  *  ...        ...
 255  * (stack+8)   arg2
 256  * (stack+4)   arg1
 257  * (stack)     func to call
 258  */
 259 void RELAY_DebugCallTo16( int* stack, int nb_args )
 260 {
 261     THDB *thdb;
 262
 263     if (!TRACE_ON(relay)) return;
 264     thdb = THREAD_Current();
 265
 266     if (nb_args == -1)  /* Register function */
 267     {
 268         CONTEXT *context = (CONTEXT *)stack[0];
 269         WORD *stack16 = (WORD *)THREAD_STACK16(thdb);
 270         DPRINTF("CallTo16(func=%04lx:%04x,ds=%04lx",
 271                 CS_reg(context), IP_reg(context), DS_reg(context) );
 272         nb_args = stack[1] / sizeof(WORD);
 273         while (nb_args--) {
 274             --stack16;
 275             DPRINTF( ",0x%04x", *stack16 );
 276         }
 277         DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(thdb->cur_stack),
 278                 OFFSETOF(thdb->cur_stack) );
 279         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x BP=%04x ES=%04x FS=%04x\n",
 280                 AX_reg(context), BX_reg(context), CX_reg(context),
 281                 DX_reg(context), SI_reg(context), DI_reg(context),
 282                 BP_reg(context), (WORD)ES_reg(context), (WORD)FS_reg(context) );
 283     }
 284     else
 285     {
 286         DPRINTF("CallTo16(func=%04x:%04x,ds=%04x",
 287                 HIWORD(stack[0]), LOWORD(stack[0]),
 288                 SELECTOROF(thdb->cur_stack) );
 289         stack++;
 290         while (nb_args--) {
 291             DPRINTF(",0x%04x", *stack );
 292             stack++;
 293         }
 294         DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(thdb->cur_stack),
 295                 OFFSETOF(thdb->cur_stack) );
 296     }
 297 }
 298
 299
 300 /***********************************************************************
 301  *           RELAY_DebugCallTo16Ret
 302  */
 303 void RELAY_DebugCallTo16Ret( int ret_val )
 304 {
 305     THDB *thdb;
 306
 307     if (!TRACE_ON(relay)) return;
 308     thdb = THREAD_Current();
 309
 310     DPRINTF("CallTo16() ss:sp=%04x:%04x retval=0x%08x\n",
 311             SELECTOROF(thdb->cur_stack), OFFSETOF(thdb->cur_stack), ret_val);
 312 }
 313
 314
 315 /**********************************************************************
 316  *           Catch    (KERNEL.55)
 317  *
 318  * Real prototype is:
 319  *   INT16 WINAPI Catch( LPCATCHBUF lpbuf );
 320  */
 321 void WINAPI Catch16( CONTEXT *context )
 322 {
 323     VA_LIST16 valist;
 324     SEGPTR buf;
 325     LPCATCHBUF lpbuf;
 326
 327     VA_START16( valist );
 328     buf   = VA_ARG16( valist, SEGPTR );
 329     lpbuf = (LPCATCHBUF)PTR_SEG_TO_LIN( buf );
 330     VA_END16( valist );
 331
 332     /* Note: we don't save the current ss, as the catch buffer is */
 333     /* only 9 words long. Hopefully no one will have the silly    */
 334     /* idea to change the current stack before calling Throw()... */
 335
 336     /* Windows uses:
 337      * lpbuf[0] = ip
 338      * lpbuf[1] = cs
 339      * lpbuf[2] = sp
 340      * lpbuf[3] = bp
 341      * lpbuf[4] = si
 342      * lpbuf[5] = di
 343      * lpbuf[6] = ds
 344      * lpbuf[7] = unused
 345      * lpbuf[8] = ss
 346      */
 347
 348     lpbuf[0] = IP_reg(context);
 349     lpbuf[1] = CS_reg(context);
 350     /* Windows pushes 4 more words before saving sp */
 351     lpbuf[2] = SP_reg(context) - 4 * sizeof(WORD);
 352     lpbuf[3] = BP_reg(context);
 353     lpbuf[4] = SI_reg(context);
 354     lpbuf[5] = DI_reg(context);
 355     lpbuf[6] = DS_reg(context);
 356     lpbuf[7] = 0;
 357     lpbuf[8] = SS_reg(context);
 358     AX_reg(context) = 0;  /* Return 0 */
 359 }
 360
 361
 362 /**********************************************************************
 363  *           Throw    (KERNEL.56)
 364  *
 365  * Real prototype is:
 366  *   INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
 367  */
 368 void WINAPI Throw16( CONTEXT *context )
 369 {
 370     VA_LIST16 valist;
 371     SEGPTR buf;
 372     LPCATCHBUF lpbuf;
 373     STACK16FRAME *pFrame;
 374     STACK32FRAME *frame32;
 375     THDB *thdb = THREAD_Current();
 376
 377     VA_START16( valist );
 378     AX_reg(context) = VA_ARG16( valist, WORD );  /* retval */
 379     buf    = VA_ARG16( valist, SEGPTR );
 380     lpbuf  = (LPCATCHBUF)PTR_SEG_TO_LIN( buf );
 381     VA_END16( valist );
 382
 383     /* Find the frame32 corresponding to the frame16 we are jumping to */
 384     pFrame = THREAD_STACK16( thdb );
 385     frame32 = THREAD_STACK16( thdb )->frame32;
 386     while (frame32 && frame32->frame16)
 387     {
 388         if (OFFSETOF(frame32->frame16) < OFFSETOF(thdb->cur_stack))
 389             break;  /* Something strange is going on */
 390         if (OFFSETOF(frame32->frame16) > lpbuf[2])
 391         {
 392             /* We found the right frame */
 393             pFrame->frame32 = frame32;
 394             break;
 395         }
 396         frame32 = ((STACK16FRAME *)PTR_SEG_TO_LIN(frame32->frame16))->frame32;
 397     }
 398
 399     IP_reg(context) = lpbuf[0];
 400     CS_reg(context) = lpbuf[1];
 401     SP_reg(context) = lpbuf[2] + 4 * sizeof(WORD) - sizeof(WORD) /*extra arg*/;
 402     BP_reg(context) = lpbuf[3];
 403     SI_reg(context) = lpbuf[4];
 404     DI_reg(context) = lpbuf[5];
 405     DS_reg(context) = lpbuf[6];
 406
 407     if (lpbuf[8] != SS_reg(context))
 408         ERR(relay, "Switching stack segment with Throw() not supported; expect crash now\n" );
 409
 410     if (TRACE_ON(relay))  /* Make sure we have a valid entry point address */
 411     {
 412         static FARPROC16 entryPoint = NULL;
 413
 414         if (!entryPoint)  /* Get entry point for Throw() */
 415             entryPoint = NE_GetEntryPoint( GetModuleHandle16("KERNEL"), 56 );
 416         pFrame->entry_cs = SELECTOROF(entryPoint);
 417         pFrame->entry_ip = OFFSETOF(entryPoint);
 418     }
 419 }
 420
 421
 422 /**********************************************************************
 423  *           RELAY_CallProc32W
 424  *
 425  * Helper for CallProc[Ex]32W
 426  */
 427 static DWORD RELAY_CallProc32W(int Ex)
 428 {
 429         DWORD nrofargs, argconvmask;
 430         FARPROC proc32;
 431         DWORD *args, ret;
 432         VA_LIST16 valist;
 433         int i;
 434         int aix;
 435         dbg_decl_str(relay, 1024);
 436
 437         VA_START16( valist );
 438         nrofargs    = VA_ARG16( valist, DWORD );
 439         argconvmask = VA_ARG16( valist, DWORD );
 440         proc32      = VA_ARG16( valist, FARPROC );
 441         dsprintf(relay, "CallProc32W(%ld,%ld,%p, Ex%d args[",nrofargs,argconvmask,proc32,Ex);
 442         args = (DWORD*)HEAP_xalloc( GetProcessHeap(), 0,
 443                                     sizeof(DWORD)*nrofargs );
 444         /* CallProcEx doesn't need its args reversed */
 445         for (i=0;i<nrofargs;i++) {
 446                 if (Ex) {
 447                    aix = i;
 448                 } else {
 449                    aix = nrofargs - i - 1;
 450                 }
 451                 if (argconvmask & (1<<i))
 452                 {
 453                     SEGPTR ptr = VA_ARG16( valist, SEGPTR );
 454                     args[aix] = (DWORD)PTR_SEG_TO_LIN(ptr);
 455                     dsprintf(relay,"%08lx(%p),",ptr,PTR_SEG_TO_LIN(ptr));
 456                 }
 457                 else
 458                 {
 459                     args[aix] = VA_ARG16( valist, DWORD );
 460                     dsprintf(relay,"%ld,",args[aix]);
 461                 }
 462         }
 463         dsprintf(relay,"])");
 464         VA_END16( valist );
 465
 466         if (!proc32) ret = 0;
 467         else switch (nrofargs)
 468         {
 469         case 0: ret = proc32();
 470                 break;
 471         case 1: ret = proc32(args[0]);
 472                 break;
 473         case 2: ret = proc32(args[0],args[1]);
 474                 break;
 475         case 3: ret = proc32(args[0],args[1],args[2]);
 476                 break;
 477         case 4: ret = proc32(args[0],args[1],args[2],args[3]);
 478                 break;
 479         case 5: ret = proc32(args[0],args[1],args[2],args[3],args[4]);
 480                 break;
 481         case 6: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5]);
 482                 break;
 483         case 7: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
 484                 break;
 485         case 8: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
 486                 break;
 487         case 9: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]);
 488                 break;
 489         case 10:        ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9]);
 490                 break;
 491         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]);
 492                 break;
 493         default:
 494                 /* FIXME: should go up to 32  arguments */
 495                 ERR(relay,"Unsupported number of arguments %ld, please report.\n",nrofargs);
 496                 ret = 0;
 497                 break;
 498         }
 499         /* POP nrofargs DWORD arguments and 3 DWORD parameters */
 500         if (!Ex) STACK16_POP( THREAD_Current(),
 501                               (3 + nrofargs) * sizeof(DWORD) );
 502
 503         TRACE(relay,"%s - returns %08lx\n",dbg_str(relay),ret);
 504         HeapFree( GetProcessHeap(), 0, args );
 505         return ret;
 506 }
 507
 508
 509 /**********************************************************************
 510  *           CallProc32W    (KERNEL.517)
 511  */
 512 DWORD WINAPI CallProc32W_16()
 513 {
 514         return RELAY_CallProc32W(0);
 515 }
 516
 517
 518 /**********************************************************************
 519 *           CallProcEx32W()   (KERNEL.518)
 520 *
 521 *      C - style linkage to CallProc32W - caller pops stack.
 522 */
 523 DWORD WINAPI CallProcEx32W_16()
 524 {
 525         return RELAY_CallProc32W(TRUE);
 526 }