2 * Copyright 1993 Robert J. Amstadt
3 * Copyright 1995 Alexandre Julliard
14 #include "stackframe.h"
20 /***********************************************************************
23 BOOL32
RELAY_Init(void)
26 extern BOOL32
THUNK_Init(void);
28 /* Allocate the code selector for CallTo16 routines */
30 extern void CALLTO16_Start(), CALLTO16_End();
31 extern void CALLTO16_Ret_word(), CALLTO16_Ret_long();
32 extern void CALLTO16_Ret_eax();
33 extern DWORD CALLTO16_RetAddr_word
;
34 extern DWORD CALLTO16_RetAddr_long
;
35 extern DWORD CALLTO16_RetAddr_eax
;
37 codesel
= GLOBAL_CreateBlock( GMEM_FIXED
, (void *)CALLTO16_Start
,
38 (int)CALLTO16_End
- (int)CALLTO16_Start
,
39 0, TRUE
, TRUE
, FALSE
, NULL
);
40 if (!codesel
) return FALSE
;
42 /* Patch the return addresses for CallTo16 routines */
44 CALLTO16_RetAddr_word
=MAKELONG( (int)CALLTO16_Ret_word
-(int)CALLTO16_Start
,
46 CALLTO16_RetAddr_long
=MAKELONG( (int)CALLTO16_Ret_long
-(int)CALLTO16_Start
,
48 CALLTO16_RetAddr_eax
=MAKELONG( (int)CALLTO16_Ret_eax
-(int)CALLTO16_Start
,
51 /* Create built-in modules */
52 if (!BUILTIN_Init()) return FALSE
;
54 /* Initialize thunking */
60 /***********************************************************************
61 * RELAY_DebugCallFrom16
63 void RELAY_DebugCallFrom16( int func_type
, char *args
,
64 void *entry_point
, CONTEXT
*context
)
71 if (!TRACE_ON(relay
)) return;
73 frame
= CURRENT_STACK16
;
74 printf( "Call %s(", BUILTIN_GetEntryPoint16( frame
->entry_cs
,
79 if (func_type
& 4) /* cdecl */
87 printf( "0x%04x", *(WORD
*)args16
);
91 printf( "0x%08x", *(int *)args16
);
95 printf( "%04x:%04x", *(WORD
*)(args16
+2), *(WORD
*)args16
);
96 if (HIWORD(*(SEGPTR
*)args16
))
97 debug_dumpstr( (LPSTR
)PTR_SEG_TO_LIN(*(SEGPTR
*)args16
));
101 printf( "%04x:%04x", *(WORD
*)(args16
+2), *(WORD
*)args16
);
105 printf( "%04x:%04x", *(WORD
*)(args16
+2), *(WORD
*)args16
);
106 if (HIWORD( *(SEGPTR
*)args16
))
107 debug_dumpstr( (LPSTR
)PTR_SEG_TO_LIN(*(SEGPTR
*)args16
));
112 if (*args
) printf( "," );
117 /* Start with the last arg */
118 for (i
= 0; args
[i
]; i
++)
142 printf( "0x%04x", *(WORD
*)args16
);
146 printf( "0x%08x", *(int *)args16
);
150 printf( "0x%08x", *(int *)args16
);
151 if (HIWORD(*(SEGPTR
*)args16
))
152 debug_dumpstr( (LPSTR
)PTR_SEG_TO_LIN(*(SEGPTR
*)args16
));
156 printf( "%04x:%04x", *(WORD
*)(args16
+2), *(WORD
*)args16
);
160 printf( "%04x:%04x", *(WORD
*)(args16
+2), *(WORD
*)args16
);
161 if (HIWORD( *(SEGPTR
*)args16
))
162 debug_dumpstr( (LPSTR
)PTR_SEG_TO_LIN(*(SEGPTR
*)args16
));
166 if (*args
) printf( "," );
170 printf( ") ret=%04x:%04x ds=%04x\n", frame
->cs
, frame
->ip
, frame
->ds
);
173 if (func_type
& 2) /* register function */
174 printf( " AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
175 AX_reg(context
), BX_reg(context
), CX_reg(context
),
176 DX_reg(context
), SI_reg(context
), DI_reg(context
),
177 (WORD
)ES_reg(context
), EFL_reg(context
) );
181 /***********************************************************************
182 * RELAY_DebugCallFrom16Ret
184 void RELAY_DebugCallFrom16Ret( int func_type
, int ret_val
, CONTEXT
*context
)
189 if (!TRACE_ON(relay
)) return;
190 frame
= CURRENT_STACK16
;
191 printf( "Ret %s() ", BUILTIN_GetEntryPoint16( frame
->entry_cs
,
197 printf( "retval=0x%08x ret=%04x:%04x ds=%04x\n",
198 ret_val
, frame
->cs
, frame
->ip
, frame
->ds
);
201 printf( "retval=0x%04x ret=%04x:%04x ds=%04x\n",
202 ret_val
& 0xffff, frame
->cs
, frame
->ip
, frame
->ds
);
205 printf( "retval=none ret=%04x:%04x ds=%04x\n",
206 (WORD
)CS_reg(context
), IP_reg(context
), (WORD
)DS_reg(context
));
207 printf( " AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
208 AX_reg(context
), BX_reg(context
), CX_reg(context
),
209 DX_reg(context
), SI_reg(context
), DI_reg(context
),
210 (WORD
)ES_reg(context
), EFL_reg(context
) );
216 /***********************************************************************
217 * RELAY_Unimplemented16
219 * This function is called for unimplemented 16-bit entry points (declared
220 * as 'stub' in the spec file).
222 void RELAY_Unimplemented16(void)
225 STACK16FRAME
*frame
= CURRENT_STACK16
;
226 MSG("No handler for Win16 routine %s (called from %04x:%04x)\n",
227 BUILTIN_GetEntryPoint16(frame
->entry_cs
,frame
->entry_ip
,&ordinal
),
228 frame
->cs
, frame
->ip
);
229 TASK_KillCurrentTask(1);
233 /***********************************************************************
234 * RELAY_DebugCallTo16
236 * 'stack' points to the called function address on the 32-bit stack.
241 * (stack) func to call
243 void RELAY_DebugCallTo16( int* stack
, int nb_args
)
247 if (!TRACE_ON(relay
)) return;
248 thdb
= THREAD_Current();
250 if (nb_args
== -1) /* Register function */
252 CONTEXT
*context
= (CONTEXT
*)stack
[0];
253 WORD
*stack16
= (WORD
*)THREAD_STACK16(thdb
);
254 printf( "CallTo16(func=%04lx:%04x,ds=%04lx",
255 CS_reg(context
), IP_reg(context
), DS_reg(context
) );
256 nb_args
= stack
[1] / sizeof(WORD
);
257 while (nb_args
--) printf( ",0x%04x", *(--stack16
) );
258 printf( ") ss:sp=%04x:%04x\n", SELECTOROF(thdb
->cur_stack
),
259 OFFSETOF(thdb
->cur_stack
) );
260 printf( " AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x BP=%04x ES=%04x\n",
261 AX_reg(context
), BX_reg(context
), CX_reg(context
),
262 DX_reg(context
), SI_reg(context
), DI_reg(context
),
263 BP_reg(context
), (WORD
)ES_reg(context
) );
267 printf( "CallTo16(func=%04x:%04x,ds=%04x",
268 HIWORD(stack
[0]), LOWORD(stack
[0]),
269 SELECTOROF(thdb
->cur_stack
) );
271 while (nb_args
--) printf( ",0x%04x", *stack
++ );
272 printf( ") ss:sp=%04x:%04x\n", SELECTOROF(thdb
->cur_stack
),
273 OFFSETOF(thdb
->cur_stack
) );
278 /**********************************************************************
282 * INT16 WINAPI Catch( LPCATCHBUF lpbuf );
284 void WINAPI
Catch( CONTEXT
*context
)
290 VA_START16( valist
);
291 buf
= VA_ARG16( valist
, SEGPTR
);
292 lpbuf
= (LPCATCHBUF
)PTR_SEG_TO_LIN( buf
);
295 /* Note: we don't save the current ss, as the catch buffer is */
296 /* only 9 words long. Hopefully no one will have the silly */
297 /* idea to change the current stack before calling Throw()... */
311 lpbuf
[0] = IP_reg(context
);
312 lpbuf
[1] = CS_reg(context
);
313 /* Windows pushes 4 more words before saving sp */
314 lpbuf
[2] = SP_reg(context
) - 4 * sizeof(WORD
);
315 lpbuf
[3] = BP_reg(context
);
316 lpbuf
[4] = SI_reg(context
);
317 lpbuf
[5] = DI_reg(context
);
318 lpbuf
[6] = DS_reg(context
);
320 lpbuf
[8] = SS_reg(context
);
321 AX_reg(context
) = 0; /* Return 0 */
325 /**********************************************************************
329 * INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
331 void WINAPI
Throw( CONTEXT
*context
)
336 STACK16FRAME
*pFrame
;
337 STACK32FRAME
*frame32
;
338 THDB
*thdb
= THREAD_Current();
340 VA_START16( valist
);
341 AX_reg(context
) = VA_ARG16( valist
, WORD
); /* retval */
342 buf
= VA_ARG16( valist
, SEGPTR
);
343 lpbuf
= (LPCATCHBUF
)PTR_SEG_TO_LIN( buf
);
346 /* Find the frame32 corresponding to the frame16 we are jumping to */
347 pFrame
= THREAD_STACK16( thdb
);
348 frame32
= THREAD_STACK16( thdb
)->frame32
;
349 while (frame32
&& frame32
->frame16
)
351 if (OFFSETOF(frame32
->frame16
) < OFFSETOF(thdb
->cur_stack
))
352 break; /* Something strange is going on */
353 if (OFFSETOF(frame32
->frame16
) > lpbuf
[2])
355 /* We found the right frame */
356 pFrame
->frame32
= frame32
;
359 frame32
= ((STACK16FRAME
*)PTR_SEG_TO_LIN(frame32
->frame16
))->frame32
;
362 IP_reg(context
) = lpbuf
[0];
363 CS_reg(context
) = lpbuf
[1];
364 SP_reg(context
) = lpbuf
[2] + 4 * sizeof(WORD
) - sizeof(WORD
) /*extra arg*/;
365 BP_reg(context
) = lpbuf
[3];
366 SI_reg(context
) = lpbuf
[4];
367 DI_reg(context
) = lpbuf
[5];
368 DS_reg(context
) = lpbuf
[6];
370 if (lpbuf
[8] != SS_reg(context
))
371 ERR(relay
, "Switching stack segment with Throw() not supported; expect crash now\n" );
373 if (TRACE_ON(relay
)) /* Make sure we have a valid entry point address */
375 static FARPROC16 entryPoint
= NULL
;
377 if (!entryPoint
) /* Get entry point for Throw() */
378 entryPoint
= NE_GetEntryPoint( GetModuleHandle16("KERNEL"), 56 );
379 pFrame
->entry_cs
= SELECTOROF(entryPoint
);
380 pFrame
->entry_ip
= OFFSETOF(entryPoint
);
385 /**********************************************************************
388 * Helper for CallProc[Ex]32W
390 static DWORD
RELAY_CallProc32W(int Ex
)
392 DWORD nrofargs
, argconvmask
;
397 dbg_decl_str(relay
, 1024);
399 VA_START16( valist
);
400 nrofargs
= VA_ARG16( valist
, DWORD
);
401 argconvmask
= VA_ARG16( valist
, DWORD
);
402 proc32
= VA_ARG16( valist
, FARPROC32
);
403 dsprintf(relay
, "CallProc32W(%ld,%ld,%p, Ex%d args[",nrofargs
,argconvmask
,proc32
,Ex
);
404 args
= (DWORD
*)HEAP_xalloc( GetProcessHeap(), 0,
405 sizeof(DWORD
)*nrofargs
);
406 for (i
=0;i
<nrofargs
;i
++) {
407 if (argconvmask
& (1<<i
))
409 SEGPTR ptr
= VA_ARG16( valist
, SEGPTR
);
410 args
[nrofargs
-i
-1] = (DWORD
)PTR_SEG_TO_LIN(ptr
);
411 dsprintf(relay
,"%08lx(%p),",ptr
,PTR_SEG_TO_LIN(ptr
));
415 args
[nrofargs
-i
-1] = VA_ARG16( valist
, DWORD
);
416 dsprintf(relay
,"%ld,",args
[nrofargs
-i
-1]);
419 dsprintf(relay
,"])");
423 case 0: ret
= proc32();
425 case 1: ret
= proc32(args
[0]);
427 case 2: ret
= proc32(args
[0],args
[1]);
429 case 3: ret
= proc32(args
[0],args
[1],args
[2]);
431 case 4: ret
= proc32(args
[0],args
[1],args
[2],args
[3]);
433 case 5: ret
= proc32(args
[0],args
[1],args
[2],args
[3],args
[4]);
435 case 6: ret
= proc32(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5]);
437 case 7: ret
= proc32(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6]);
439 case 8: ret
= proc32(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6],args
[7]);
441 case 9: ret
= proc32(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6],args
[7],args
[8]);
443 case 10: ret
= proc32(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6],args
[7],args
[8],args
[9]);
445 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]);
448 /* FIXME: should go up to 32 arguments */
449 ERR(relay
,"Unsupported number of arguments %ld, please report.\n",nrofargs
);
453 /* POP nrofargs DWORD arguments and 3 DWORD parameters */
454 if (!Ex
) STACK16_POP( THREAD_Current(),
455 (3 + nrofargs
) * sizeof(DWORD
) );
457 TRACE(relay
,"%s - returns %08lx\n",dbg_str(relay
),ret
);
458 HeapFree( GetProcessHeap(), 0, args
);
463 /**********************************************************************
464 * CallProc32W (KERNEL.517)
466 DWORD WINAPI
WIN16_CallProc32W()
468 return RELAY_CallProc32W(0);
472 /**********************************************************************
473 * CallProcEx32W() (KERNEL.518)
475 * C - style linkage to CallProc32W - caller pops stack.
477 DWORD WINAPI
WIN16_CallProcEx32W()
479 return RELAY_CallProc32W(TRUE
);