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