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 "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 DWORD CallTo16_RetAddr;
  39     extern DWORD CALL32_CBClient_RetAddr;
  40     extern DWORD CALL32_CBClientEx_RetAddr;
  41
  42     codesel = GLOBAL_CreateBlock( GMEM_FIXED, (void *)Call16_Ret_Start,
  43                                   (int)Call16_Ret_End - (int)Call16_Ret_Start,
  44                                   GetModuleHandle16( "KERNEL" ),
  45                                   TRUE, TRUE, FALSE, NULL );
  46     if (!codesel) return FALSE;
  47
  48       /* Patch the return addresses for CallTo16 routines */
  49
  50     CallTo16_RetAddr =
  51         MAKELONG( (int)CallTo16_Ret -(int)Call16_Ret_Start, codesel );
  52     CALL32_CBClient_RetAddr =
  53         MAKELONG( (int)CALL32_CBClient_Ret -(int)Call16_Ret_Start, codesel );
  54     CALL32_CBClientEx_RetAddr =
  55         MAKELONG( (int)CALL32_CBClientEx_Ret -(int)Call16_Ret_Start, codesel );
  56 #endif
  57
  58     /* Create built-in modules */
  59     if (!BUILTIN_Init()) return FALSE;
  60
  61     /* Initialize thunking */
  62     return THUNK_Init();
  63 }
  64
  65 /*
  66  * Stubs for the CallTo16/CallFrom16 routines on non-Intel architectures
  67  * (these will never be called but need to be present to satisfy the linker ...)
  68  */
  69 #ifndef __i386__
  70 WORD CALLBACK CallTo16Word( FARPROC16 target, INT nArgs )
  71 { assert( FALSE ); }
  72
  73 LONG CALLBACK CallTo16Long( FARPROC16 target, INT nArgs )
  74 { assert( FALSE ); }
  75
  76 LONG CALLBACK CallTo16RegisterShort( const CONTEXT86 *context, INT nArgs )
  77 { assert( FALSE ); }
  78
  79 LONG CALLBACK CallTo16RegisterLong ( const CONTEXT86 *context, INT nArgs )
  80 { assert( FALSE ); }
  81
  82 WORD CallFrom16Word( void )
  83 { assert( FALSE ); }
  84
  85 LONG CallFrom16Long( void )
  86 { assert( FALSE ); }
  87
  88 void CallFrom16Register( void )
  89 { assert( FALSE ); }
  90
  91 void CallFrom16Thunk( void )
  92 { assert( FALSE ); }
  93
  94 DWORD WINAPI CALL32_CBClient( FARPROC proc, LPWORD args, DWORD *esi )
  95 { assert( FALSE ); }
  96
  97 DWORD WINAPI CALL32_CBClientEx( FARPROC proc, LPWORD args, DWORD *esi, INT *nArgs )
  98 { assert( FALSE ); }
  99 #endif
 100
 101
 102 /* from relay32/relay386.c */
 103 extern char **debug_relay_excludelist,**debug_relay_includelist;
 104
 105 /***********************************************************************
 106  *           RELAY_DebugCallFrom16
 107  */
 108 void RELAY_DebugCallFrom16( CONTEXT86 *context )
 109 {
 110     STACK16FRAME *frame;
 111     WORD ordinal;
 112     char *args16, funstr[80];
 113     const char *args;
 114     int i, usecdecl, reg_func;
 115
 116     if (!TRACE_ON(relay)) return;
 117
 118     frame = CURRENT_STACK16;
 119     args = BUILTIN_GetEntryPoint16( frame, funstr, &ordinal );
 120     if (!args) return; /* happens for the two snoop register relays */
 121     if (!RELAY_ShowDebugmsgRelay(funstr)) return;
 122     DPRINTF( "Call %s(",funstr);
 123     VA_START16( args16 );
 124
 125     usecdecl = ( *args == 'c' );
 126     args += 2;
 127     reg_func = (    memcmp( args, "regs_", 5 ) == 0
 128                  || memcmp( args, "intr_", 5 ) == 0 );
 129     args += 5;
 130
 131     if (usecdecl)
 132     {
 133         while (*args)
 134         {
 135             switch(*args)
 136             {
 137             case 'w':
 138             case 's':
 139                 DPRINTF( "0x%04x", *(WORD *)args16 );
 140                 args16 += 2;
 141                 break;
 142             case 'l':
 143                 DPRINTF( "0x%08x", *(int *)args16 );
 144                 args16 += 4;
 145                 break;
 146             case 'p':
 147                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 148                 args16 += 4;
 149                 break;
 150             case 't':
 151             case 'T':
 152                 DPRINTF( "%04x:%04x %s", *(WORD *)(args16+2), *(WORD *)args16,
 153                          debugres_a( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 )) );
 154                 args16 += 4;
 155                 break;
 156             }
 157             args++;
 158             if (*args) DPRINTF( "," );
 159         }
 160     }
 161     else  /* not cdecl */
 162     {
 163         /* Start with the last arg */
 164         for (i = 0; args[i]; i++)
 165         {
 166             switch(args[i])
 167             {
 168             case 'w':
 169             case 's':
 170                 args16 += 2;
 171                 break;
 172             case 'l':
 173             case 'p':
 174             case 't':
 175             case 'T':
 176                 args16 += 4;
 177                 break;
 178             }
 179         }
 180
 181         while (*args)
 182         {
 183             switch(*args)
 184             {
 185             case 'w':
 186             case 's':
 187                 args16 -= 2;
 188                 DPRINTF( "0x%04x", *(WORD *)args16 );
 189                 break;
 190             case 'l':
 191                 args16 -= 4;
 192                 DPRINTF( "0x%08x", *(int *)args16 );
 193                 break;
 194             case 't':
 195                 args16 -= 4;
 196                 DPRINTF( "0x%08x %s", *(int *)args16,
 197                          debugres_a( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 )));
 198                 break;
 199             case 'p':
 200                 args16 -= 4;
 201                 DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
 202                 break;
 203             case 'T':
 204                 args16 -= 4;
 205                 DPRINTF( "%04x:%04x %s", *(WORD *)(args16+2), *(WORD *)args16,
 206                          debugres_a( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 )));
 207                 break;
 208             }
 209             args++;
 210             if (*args) DPRINTF( "," );
 211         }
 212     }
 213
 214     DPRINTF( ") ret=%04x:%04x ds=%04x\n", frame->cs, frame->ip, frame->ds );
 215     VA_END16( args16 );
 216
 217     if (reg_func)
 218         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 219                 AX_reg(context), BX_reg(context), CX_reg(context),
 220                 DX_reg(context), SI_reg(context), DI_reg(context),
 221                 (WORD)ES_reg(context), EFL_reg(context) );
 222
 223     SYSLEVEL_CheckNotLevel( 2 );
 224 }
 225
 226
 227 /***********************************************************************
 228  *           RELAY_DebugCallFrom16Ret
 229  */
 230 void RELAY_DebugCallFrom16Ret( CONTEXT86 *context, int ret_val )
 231 {
 232     STACK16FRAME *frame;
 233     WORD ordinal;
 234     char funstr[80];
 235     const char *args;
 236
 237     if (!TRACE_ON(relay)) return;
 238     frame = CURRENT_STACK16;
 239     args = BUILTIN_GetEntryPoint16( frame, funstr, &ordinal );
 240     if (!args) return;
 241     if (!RELAY_ShowDebugmsgRelay(funstr)) return;
 242     DPRINTF( "Ret  %s() ",funstr);
 243
 244     if ( memcmp( args+2, "long_", 5 ) == 0 )
 245     {
 246         DPRINTF( "retval=0x%08x ret=%04x:%04x ds=%04x\n",
 247                  ret_val, frame->cs, frame->ip, frame->ds );
 248     }
 249     else if ( memcmp( args+2, "word_", 5 ) == 0 )
 250     {
 251         DPRINTF( "retval=0x%04x ret=%04x:%04x ds=%04x\n",
 252                  ret_val & 0xffff, frame->cs, frame->ip, frame->ds );
 253     }
 254     else if (    memcmp( args+2, "regs_", 5 ) == 0
 255               || memcmp( args+2, "intr_", 5 ) == 0 )
 256     {
 257         DPRINTF("retval=none ret=%04x:%04x ds=%04x\n",
 258                 (WORD)CS_reg(context), LOWORD(EIP_reg(context)), (WORD)DS_reg(context));
 259         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
 260                 AX_reg(context), BX_reg(context), CX_reg(context),
 261                 DX_reg(context), SI_reg(context), DI_reg(context),
 262                 (WORD)ES_reg(context), EFL_reg(context) );
 263     }
 264
 265     SYSLEVEL_CheckNotLevel( 2 );
 266 }
 267
 268
 269 /***********************************************************************
 270  *           RELAY_Unimplemented16
 271  *
 272  * This function is called for unimplemented 16-bit entry points (declared
 273  * as 'stub' in the spec file).
 274  */
 275 void RELAY_Unimplemented16(void)
 276 {
 277     WORD ordinal;
 278     char name[80];
 279     STACK16FRAME *frame = CURRENT_STACK16;
 280     BUILTIN_GetEntryPoint16( frame, name, &ordinal );
 281     MESSAGE("No handler for Win16 routine %s (called from %04x:%04x)\n",
 282             name, frame->cs, frame->ip );
 283     ExitProcess(1);
 284 }
 285
 286
 287 /***********************************************************************
 288  *           RELAY_DebugCallTo16
 289  *
 290  * 'target' contains either the function to call (normal CallTo16)
 291  * or a pointer to the CONTEXT86 struct (register CallTo16).
 292  * 'nb_args' is the number of argument bytes on the 16-bit stack;
 293  * 'reg_func' specifies whether we have a register CallTo16 or not.
 294  */
 295 void RELAY_DebugCallTo16( LPVOID target, int nb_args, BOOL reg_func )
 296 {
 297     WORD *stack16;
 298     TEB *teb;
 299
 300     if (!TRACE_ON(relay)) return;
 301     teb = NtCurrentTeb();
 302     stack16 = (WORD *)THREAD_STACK16(teb);
 303
 304     nb_args /= sizeof(WORD);
 305
 306     if ( reg_func )
 307     {
 308         CONTEXT86 *context = (CONTEXT86 *)target;
 309
 310         DPRINTF("CallTo16(func=%04lx:%04x,ds=%04lx",
 311                 CS_reg(context), LOWORD(EIP_reg(context)), DS_reg(context) );
 312         while (nb_args--) DPRINTF( ",0x%04x", *--stack16 );
 313         DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(teb->cur_stack),
 314                 OFFSETOF(teb->cur_stack) );
 315         DPRINTF("     AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x BP=%04x ES=%04x FS=%04x\n",
 316                 AX_reg(context), BX_reg(context), CX_reg(context),
 317                 DX_reg(context), SI_reg(context), DI_reg(context),
 318                 BP_reg(context), (WORD)ES_reg(context), (WORD)FS_reg(context) );
 319     }
 320     else
 321     {
 322         DPRINTF("CallTo16(func=%04x:%04x,ds=%04x",
 323                 HIWORD(target), LOWORD(target), SELECTOROF(teb->cur_stack) );
 324         while (nb_args--) DPRINTF( ",0x%04x", *--stack16 );
 325         DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(teb->cur_stack),
 326                 OFFSETOF(teb->cur_stack) );
 327     }
 328
 329     SYSLEVEL_CheckNotLevel( 2 );
 330 }
 331
 332
 333 /***********************************************************************
 334  *           RELAY_DebugCallTo16Ret
 335  */
 336 void RELAY_DebugCallTo16Ret( int ret_val )
 337 {
 338     if (!TRACE_ON(relay)) return;
 339
 340     DPRINTF("CallTo16() ss:sp=%04x:%04x retval=0x%08x\n",
 341             SELECTOROF(NtCurrentTeb()->cur_stack),
 342             OFFSETOF(NtCurrentTeb()->cur_stack), ret_val);
 343     SYSLEVEL_CheckNotLevel( 2 );
 344 }
 345
 346
 347 /**********************************************************************
 348  *           Catch    (KERNEL.55)
 349  *
 350  * Real prototype is:
 351  *   INT16 WINAPI Catch( LPCATCHBUF lpbuf );
 352  */
 353 void WINAPI Catch16( LPCATCHBUF lpbuf, CONTEXT86 *context )
 354 {
 355     /* Note: we don't save the current ss, as the catch buffer is */
 356     /* only 9 words long. Hopefully no one will have the silly    */
 357     /* idea to change the current stack before calling Throw()... */
 358
 359     /* Windows uses:
 360      * lpbuf[0] = ip
 361      * lpbuf[1] = cs
 362      * lpbuf[2] = sp
 363      * lpbuf[3] = bp
 364      * lpbuf[4] = si
 365      * lpbuf[5] = di
 366      * lpbuf[6] = ds
 367      * lpbuf[7] = unused
 368      * lpbuf[8] = ss
 369      */
 370
 371     lpbuf[0] = LOWORD(EIP_reg(context));
 372     lpbuf[1] = CS_reg(context);
 373     /* Windows pushes 4 more words before saving sp */
 374     lpbuf[2] = LOWORD(ESP_reg(context)) - 4 * sizeof(WORD);
 375     lpbuf[3] = LOWORD(EBP_reg(context));
 376     lpbuf[4] = LOWORD(ESI_reg(context));
 377     lpbuf[5] = LOWORD(EDI_reg(context));
 378     lpbuf[6] = DS_reg(context);
 379     lpbuf[7] = 0;
 380     lpbuf[8] = SS_reg(context);
 381     AX_reg(context) = 0;  /* Return 0 */
 382 }
 383
 384
 385 /**********************************************************************
 386  *           Throw    (KERNEL.56)
 387  *
 388  * Real prototype is:
 389  *   INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
 390  */
 391 void WINAPI Throw16( LPCATCHBUF lpbuf, INT16 retval, CONTEXT86 *context )
 392 {
 393     STACK16FRAME *pFrame;
 394     STACK32FRAME *frame32;
 395     TEB *teb = NtCurrentTeb();
 396
 397     AX_reg(context) = retval;
 398
 399     /* Find the frame32 corresponding to the frame16 we are jumping to */
 400     pFrame = THREAD_STACK16(teb);
 401     frame32 = pFrame->frame32;
 402     while (frame32 && frame32->frame16)
 403     {
 404         if (OFFSETOF(frame32->frame16) < OFFSETOF(teb->cur_stack))
 405             break;  /* Something strange is going on */
 406         if (OFFSETOF(frame32->frame16) > lpbuf[2])
 407         {
 408             /* We found the right frame */
 409             pFrame->frame32 = frame32;
 410             break;
 411         }
 412         frame32 = ((STACK16FRAME *)PTR_SEG_TO_LIN(frame32->frame16))->frame32;
 413     }
 414
 415     EIP_reg(context) = lpbuf[0];
 416     CS_reg(context)  = lpbuf[1];
 417     ESP_reg(context) = lpbuf[2] + 4 * sizeof(WORD) - sizeof(WORD) /*extra arg*/;
 418     EBP_reg(context) = lpbuf[3];
 419     ESI_reg(context) = lpbuf[4];
 420     EDI_reg(context) = lpbuf[5];
 421     DS_reg(context)  = lpbuf[6];
 422
 423     if (lpbuf[8] != SS_reg(context))
 424         ERR("Switching stack segment with Throw() not supported; expect crash now\n" );
 425 }
 426