2 * Relay calls helper routines
4 * Copyright 1993 Robert J. Amstadt
5 * Copyright 1995 Martin von Loewis
6 * Copyright 1995, 1996, 1997 Alexandre Julliard
7 * Copyright 1997 Eric Youngdale
8 * Copyright 1999 Ulrich Weigand
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include "wine/port.h"
31 #include "stackframe.h"
35 #if defined(__GNUC__) && !defined(__svr4__)
36 static const int use_stabs = 1;
38 static const int use_stabs = 0;
43 static void function_header( FILE *outfile, const char *name )
45 fprintf( outfile, "\n\t.align %d\n", get_alignment(4) );
47 fprintf( outfile, "\t.stabs \"%s:F1\",36,0,0," __ASM_NAME("%s") "\n", name, name);
48 fprintf( outfile, "\t" __ASM_FUNC("%s") "\n", name );
49 fprintf( outfile, "\t.globl " __ASM_NAME("%s") "\n", name );
50 fprintf( outfile, __ASM_NAME("%s") ":\n", name );
54 /*******************************************************************
57 * This routine builds the core routines used in 16->32 thunks:
58 * CallFrom16Word, CallFrom16Long, CallFrom16Register, and CallFrom16Thunk.
60 * These routines are intended to be called via a far call (with 32-bit
61 * operand size) from 16-bit code. The 16-bit code stub must push %bp,
62 * the 32-bit entry point to be called, and the argument conversion
63 * routine to be used (see stack layout below).
65 * The core routine completes the STACK16FRAME on the 16-bit stack and
66 * switches to the 32-bit stack. Then, the argument conversion routine
67 * is called; it gets passed the 32-bit entry point and a pointer to the
68 * 16-bit arguments (on the 16-bit stack) as parameters. (You can either
69 * use conversion routines automatically generated by BuildCallFrom16,
70 * or write your own for special purposes.)
72 * The conversion routine must call the 32-bit entry point, passing it
73 * the converted arguments, and return its return value to the core.
74 * After the conversion routine has returned, the core switches back
75 * to the 16-bit stack, converts the return value to the DX:AX format
76 * (CallFrom16Long), and returns to the 16-bit call stub. All parameters,
77 * including %bp, are popped off the stack.
79 * The 16-bit call stub now returns to the caller, popping the 16-bit
80 * arguments if necessary (pascal calling convention).
82 * In the case of a 'register' function, CallFrom16Register fills a
83 * CONTEXT86 structure with the values all registers had at the point
84 * the first instruction of the 16-bit call stub was about to be
85 * executed. A pointer to this CONTEXT86 is passed as third parameter
86 * to the argument conversion routine, which typically passes it on
87 * to the called 32-bit entry point.
89 * CallFrom16Thunk is a special variant used by the implementation of
90 * the Win95 16->32 thunk functions C16ThkSL and C16ThkSL01 and is
91 * implemented as follows:
92 * On entry, the EBX register is set up to contain a flat pointer to the
93 * 16-bit stack such that EBX+22 points to the first argument.
94 * Then, the entry point is called, while EBP is set up to point
95 * to the return address (on the 32-bit stack).
96 * The called function returns with CX set to the number of bytes
97 * to be popped of the caller's stack.
99 * Stack layout upon entry to the core routine (STACK16FRAME):
101 * (sp+24) word first 16-bit arg
105 * (sp+14) long 32-bit entry point (reused for Win16 mutex recursion count)
106 * (sp+12) word ip of actual entry point (necessary for relay debugging)
107 * (sp+8) long relay (argument conversion) function entry point
108 * (sp+4) long cs of 16-bit entry point
109 * (sp) long ip of 16-bit entry point
111 * Added on the stack:
112 * (sp-2) word saved gs
113 * (sp-4) word saved fs
114 * (sp-6) word saved es
115 * (sp-8) word saved ds
116 * (sp-12) long saved ebp
117 * (sp-16) long saved ecx
118 * (sp-20) long saved edx
119 * (sp-24) long saved previous stack
121 static void BuildCallFrom16Core( FILE *outfile, int reg_func, int thunk, int short_ret )
123 char *name = thunk? "thunk" : reg_func? "regs" : short_ret? "word" : "long";
125 /* Function header */
126 if (thunk) function_header( outfile, "__wine_call_from_16_thunk" );
127 else if (reg_func) function_header( outfile, "__wine_call_from_16_regs" );
128 else if (short_ret) function_header( outfile, "__wine_call_from_16_word" );
129 else function_header( outfile, "__wine_call_from_16_long" );
131 /* Create STACK16FRAME (except STACK32FRAME link) */
132 fprintf( outfile, "\tpushw %%gs\n" );
133 fprintf( outfile, "\tpushw %%fs\n" );
134 fprintf( outfile, "\tpushw %%es\n" );
135 fprintf( outfile, "\tpushw %%ds\n" );
136 fprintf( outfile, "\tpushl %%ebp\n" );
137 fprintf( outfile, "\tpushl %%ecx\n" );
138 fprintf( outfile, "\tpushl %%edx\n" );
140 /* Save original EFlags register */
141 fprintf( outfile, "\tpushfl\n" );
145 /* Get Global Offset Table into %ecx */
146 fprintf( outfile, "\tcall .L__wine_call_from_16_%s.getgot1\n", name );
147 fprintf( outfile, ".L__wine_call_from_16_%s.getgot1:\n", name );
148 fprintf( outfile, "\tpopl %%ecx\n" );
149 fprintf( outfile, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-.L__wine_call_from_16_%s.getgot1], %%ecx\n", name );
154 fprintf( outfile, "\t.byte 0x2e\n\tmovl " __ASM_NAME("CallTo16_DataSelector@GOT") "(%%ecx), %%edx\n" );
155 fprintf( outfile, "\t.byte 0x2e\n\tmovl (%%edx), %%edx\n" );
158 fprintf( outfile, "\t.byte 0x2e\n\tmovl " __ASM_NAME("CallTo16_DataSelector") ",%%edx\n" );
160 /* Load 32-bit segment registers */
162 fprintf( outfile, "\tdata16\n");
164 fprintf( outfile, "\tmovw %%dx, %%ds\n" );
166 fprintf( outfile, "\tdata16\n");
168 fprintf( outfile, "\tmovw %%dx, %%es\n" );
172 fprintf( outfile, "\tmovl " __ASM_NAME("SYSLEVEL_Win16CurrentTeb@GOT") "(%%ecx), %%edx\n" );
173 fprintf( outfile, "\tmovw (%%edx), %%fs\n" );
176 fprintf( outfile, "\tmovw " __ASM_NAME("SYSLEVEL_Win16CurrentTeb") ", %%fs\n" );
178 /* Get address of wine_ldt_copy array into %ecx */
180 fprintf( outfile, "\tmovl " __ASM_NAME("wine_ldt_copy@GOT") "(%%ecx), %%ecx\n" );
182 fprintf( outfile, "\tmovl $" __ASM_NAME("wine_ldt_copy") ", %%ecx\n" );
184 /* Translate STACK16FRAME base to flat offset in %edx */
185 fprintf( outfile, "\tmovw %%ss, %%dx\n" );
186 fprintf( outfile, "\tandl $0xfff8, %%edx\n" );
187 fprintf( outfile, "\tshrl $1, %%edx\n" );
188 fprintf( outfile, "\tmovl (%%ecx,%%edx), %%edx\n" );
189 fprintf( outfile, "\tmovzwl %%sp, %%ebp\n" );
190 fprintf( outfile, "\tleal (%%ebp,%%edx), %%edx\n" );
192 /* Get saved flags into %ecx */
193 fprintf( outfile, "\tpopl %%ecx\n" );
195 /* Get the 32-bit stack pointer from the TEB and complete STACK16FRAME */
196 fprintf( outfile, "\t.byte 0x64\n\tmovl (%d), %%ebp\n", STACKOFFSET );
197 fprintf( outfile, "\tpushl %%ebp\n" );
201 fprintf( outfile,"\tdata16\n");
203 fprintf( outfile, "\t.byte 0x64\n\tmovw %%ss, (%d)\n", STACKOFFSET + 2 );
204 fprintf( outfile, "\t.byte 0x64\n\tmovw %%sp, (%d)\n", STACKOFFSET );
205 fprintf( outfile, "\tpushl %%ds\n" );
206 fprintf( outfile, "\tpopl %%ss\n" );
207 fprintf( outfile, "\tmovl %%ebp, %%esp\n" );
208 fprintf( outfile, "\taddl $%d, %%ebp\n", STRUCTOFFSET(STACK32FRAME, ebp) );
212 STACK16FRAME is completely set up
213 DS, ES, SS: flat data segment
215 ESP: points to last STACK32FRAME
216 EBP: points to ebp member of last STACK32FRAME
217 EDX: points to current STACK16FRAME
218 ECX: contains saved flags
219 all other registers: unchanged */
221 /* Special case: C16ThkSL stub */
224 /* Set up registers as expected and call thunk */
225 fprintf( outfile, "\tleal %d(%%edx), %%ebx\n", sizeof(STACK16FRAME)-22 );
226 fprintf( outfile, "\tleal -4(%%esp), %%ebp\n" );
228 fprintf( outfile, "\tcall *%d(%%edx)\n", STACK16OFFSET(entry_point) );
230 /* Switch stack back */
231 fprintf( outfile, "\t.byte 0x64\n\tmovw (%d), %%ss\n", STACKOFFSET+2 );
232 fprintf( outfile, "\t.byte 0x64\n\tmovzwl (%d), %%esp\n", STACKOFFSET );
233 fprintf( outfile, "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
235 /* Restore registers and return directly to caller */
236 fprintf( outfile, "\taddl $8, %%esp\n" );
237 fprintf( outfile, "\tpopl %%ebp\n" );
238 fprintf( outfile, "\tpopw %%ds\n" );
239 fprintf( outfile, "\tpopw %%es\n" );
240 fprintf( outfile, "\tpopw %%fs\n" );
241 fprintf( outfile, "\tpopw %%gs\n" );
242 fprintf( outfile, "\taddl $20, %%esp\n" );
244 fprintf( outfile, "\txorb %%ch, %%ch\n" );
245 fprintf( outfile, "\tpopl %%ebx\n" );
246 fprintf( outfile, "\taddw %%cx, %%sp\n" );
247 fprintf( outfile, "\tpush %%ebx\n" );
249 fprintf( outfile, "\t.byte 0x66\n" );
250 fprintf( outfile, "\tlret\n" );
256 /* Build register CONTEXT */
259 fprintf( outfile, "\tsubl $%d, %%esp\n", sizeof(CONTEXT86) );
261 fprintf( outfile, "\tmovl %%ecx, %d(%%esp)\n", CONTEXTOFFSET(EFlags) );
263 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Eax) );
264 fprintf( outfile, "\tmovl %%ebx, %d(%%esp)\n", CONTEXTOFFSET(Ebx) );
265 fprintf( outfile, "\tmovl %%esi, %d(%%esp)\n", CONTEXTOFFSET(Esi) );
266 fprintf( outfile, "\tmovl %%edi, %d(%%esp)\n", CONTEXTOFFSET(Edi) );
268 fprintf( outfile, "\tmovl %d(%%edx), %%eax\n", STACK16OFFSET(ebp) );
269 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Ebp) );
270 fprintf( outfile, "\tmovl %d(%%edx), %%eax\n", STACK16OFFSET(ecx) );
271 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Ecx) );
272 fprintf( outfile, "\tmovl %d(%%edx), %%eax\n", STACK16OFFSET(edx) );
273 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Edx) );
275 fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(ds) );
276 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegDs) );
277 fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(es) );
278 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegEs) );
279 fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(fs) );
280 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegFs) );
281 fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(gs) );
282 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegGs) );
284 fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(cs) );
285 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegCs) );
286 fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(ip) );
287 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Eip) );
289 fprintf( outfile, "\t.byte 0x64\n\tmovzwl (%d), %%eax\n", STACKOFFSET+2 );
290 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegSs) );
291 fprintf( outfile, "\t.byte 0x64\n\tmovzwl (%d), %%eax\n", STACKOFFSET );
292 fprintf( outfile, "\taddl $%d, %%eax\n", STACK16OFFSET(ip) );
293 fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Esp) );
295 fprintf( outfile, "\tfsave %d(%%esp)\n", CONTEXTOFFSET(FloatSave) );
298 /* Push address of CONTEXT86 structure -- popped by the relay routine */
299 fprintf( outfile, "\tpushl %%esp\n" );
303 /* Print debug info before call */
308 fprintf( outfile, "\tpushl %%ebx\n" );
310 /* Get Global Offset Table into %ebx (for PLT call) */
311 fprintf( outfile, "\tcall .L__wine_call_from_16_%s.getgot2\n", name );
312 fprintf( outfile, ".L__wine_call_from_16_%s.getgot2:\n", name );
313 fprintf( outfile, "\tpopl %%ebx\n" );
314 fprintf( outfile, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-.L__wine_call_from_16_%s.getgot2], %%ebx\n", name );
317 fprintf( outfile, "\tpushl %%edx\n" );
319 fprintf( outfile, "\tleal -%d(%%ebp), %%eax\n\tpushl %%eax\n",
320 sizeof(CONTEXT) + STRUCTOFFSET(STACK32FRAME, ebp) );
322 fprintf( outfile, "\tpushl $0\n" );
325 fprintf( outfile, "\tcall " __ASM_NAME("RELAY_DebugCallFrom16@PLT") "\n ");
327 fprintf( outfile, "\tcall " __ASM_NAME("RELAY_DebugCallFrom16") "\n ");
329 fprintf( outfile, "\tpopl %%edx\n" );
330 fprintf( outfile, "\tpopl %%edx\n" );
333 fprintf( outfile, "\tpopl %%ebx\n" );
336 /* Call relay routine (which will call the API entry point) */
337 fprintf( outfile, "\tleal %d(%%edx), %%eax\n", sizeof(STACK16FRAME) );
338 fprintf( outfile, "\tpushl %%eax\n" );
339 fprintf( outfile, "\tpushl %d(%%edx)\n", STACK16OFFSET(entry_point) );
340 fprintf( outfile, "\tcall *%d(%%edx)\n", STACK16OFFSET(relay) );
342 /* Print debug info after call */
347 fprintf( outfile, "\tpushl %%ebx\n" );
349 /* Get Global Offset Table into %ebx (for PLT call) */
350 fprintf( outfile, "\tcall .L__wine_call_from_16_%s.getgot3\n", name );
351 fprintf( outfile, ".L__wine_call_from_16_%s.getgot3:\n", name );
352 fprintf( outfile, "\tpopl %%ebx\n" );
353 fprintf( outfile, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-.L__wine_call_from_16_%s.getgot3], %%ebx\n", name );
356 fprintf( outfile, "\tpushl %%eax\n" );
358 fprintf( outfile, "\tleal -%d(%%ebp), %%eax\n\tpushl %%eax\n",
359 sizeof(CONTEXT) + STRUCTOFFSET(STACK32FRAME, ebp) );
361 fprintf( outfile, "\tpushl $0\n" );
364 fprintf( outfile, "\tcall " __ASM_NAME("RELAY_DebugCallFrom16Ret@PLT") "\n ");
366 fprintf( outfile, "\tcall " __ASM_NAME("RELAY_DebugCallFrom16Ret") "\n ");
368 fprintf( outfile, "\tpopl %%eax\n" );
369 fprintf( outfile, "\tpopl %%eax\n" );
372 fprintf( outfile, "\tpopl %%ebx\n" );
378 fprintf( outfile, "\tmovl %%esp, %%ebx\n" );
380 /* Switch stack back */
381 fprintf( outfile, "\t.byte 0x64\n\tmovw (%d), %%ss\n", STACKOFFSET+2 );
382 fprintf( outfile, "\t.byte 0x64\n\tmovzwl (%d), %%esp\n", STACKOFFSET );
383 fprintf( outfile, "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
385 /* Get return address to CallFrom16 stub */
386 fprintf( outfile, "\taddw $%d, %%sp\n", STACK16OFFSET(callfrom_ip)-4 );
387 fprintf( outfile, "\tpopl %%eax\n" );
388 fprintf( outfile, "\tpopl %%edx\n" );
390 /* Restore all registers from CONTEXT */
391 fprintf( outfile, "\tmovw %d(%%ebx), %%ss\n", CONTEXTOFFSET(SegSs) );
392 fprintf( outfile, "\tmovl %d(%%ebx), %%esp\n", CONTEXTOFFSET(Esp) );
393 fprintf( outfile, "\taddl $4, %%esp\n" ); /* room for final return address */
395 fprintf( outfile, "\tpushw %d(%%ebx)\n", CONTEXTOFFSET(SegCs) );
396 fprintf( outfile, "\tpushw %d(%%ebx)\n", CONTEXTOFFSET(Eip) );
397 fprintf( outfile, "\tpushl %%edx\n" );
398 fprintf( outfile, "\tpushl %%eax\n" );
399 fprintf( outfile, "\tpushl %d(%%ebx)\n", CONTEXTOFFSET(EFlags) );
400 fprintf( outfile, "\tpushl %d(%%ebx)\n", CONTEXTOFFSET(SegDs) );
402 fprintf( outfile, "\tmovw %d(%%ebx), %%es\n", CONTEXTOFFSET(SegEs) );
403 fprintf( outfile, "\tmovw %d(%%ebx), %%fs\n", CONTEXTOFFSET(SegFs) );
404 fprintf( outfile, "\tmovw %d(%%ebx), %%gs\n", CONTEXTOFFSET(SegGs) );
406 fprintf( outfile, "\tmovl %d(%%ebx), %%ebp\n", CONTEXTOFFSET(Ebp) );
407 fprintf( outfile, "\tmovl %d(%%ebx), %%esi\n", CONTEXTOFFSET(Esi) );
408 fprintf( outfile, "\tmovl %d(%%ebx), %%edi\n", CONTEXTOFFSET(Edi) );
409 fprintf( outfile, "\tmovl %d(%%ebx), %%eax\n", CONTEXTOFFSET(Eax) );
410 fprintf( outfile, "\tmovl %d(%%ebx), %%edx\n", CONTEXTOFFSET(Edx) );
411 fprintf( outfile, "\tmovl %d(%%ebx), %%ecx\n", CONTEXTOFFSET(Ecx) );
412 fprintf( outfile, "\tmovl %d(%%ebx), %%ebx\n", CONTEXTOFFSET(Ebx) );
414 fprintf( outfile, "\tpopl %%ds\n" );
415 fprintf( outfile, "\tpopfl\n" );
416 fprintf( outfile, "\tlret\n" );
420 /* Switch stack back */
421 fprintf( outfile, "\t.byte 0x64\n\tmovw (%d), %%ss\n", STACKOFFSET+2 );
422 fprintf( outfile, "\t.byte 0x64\n\tmovzwl (%d), %%esp\n", STACKOFFSET );
423 fprintf( outfile, "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
425 /* Restore registers */
426 fprintf( outfile, "\tpopl %%edx\n" );
427 fprintf( outfile, "\tpopl %%ecx\n" );
428 fprintf( outfile, "\tpopl %%ebp\n" );
429 fprintf( outfile, "\tpopw %%ds\n" );
430 fprintf( outfile, "\tpopw %%es\n" );
431 fprintf( outfile, "\tpopw %%fs\n" );
432 fprintf( outfile, "\tpopw %%gs\n" );
434 /* Prepare return value and set flags accordingly */
436 fprintf( outfile, "\tshldl $16, %%eax, %%edx\n" );
437 fprintf( outfile, "\torl %%eax, %%eax\n" );
439 /* Return to return stub which will return to caller */
440 fprintf( outfile, "\tlret $12\n" );
445 /*******************************************************************
448 * This routine builds the core routines used in 32->16 thunks:
450 * extern void WINAPI wine_call_to_16_word( SEGPTR target, int nb_args );
451 * extern void WINAPI wine_call_to_16_long( SEGPTR target, int nb_args );
452 * extern void WINAPI wine_call_to_16_regs_short( const CONTEXT86 *context, int nb_args );
453 * extern void WINAPI wine_call_to_16_regs_long ( const CONTEXT86 *context, int nb_args );
455 * These routines can be called directly from 32-bit code.
457 * All routines expect that the 16-bit stack contents (arguments) were
458 * already set up by the caller; nb_args must contain the number of bytes
459 * to be conserved. The 16-bit SS:SP will be set accordinly.
461 * All other registers are either taken from the CONTEXT86 structure
462 * or else set to default values. The target routine address is either
463 * given directly or taken from the CONTEXT86.
465 * If you want to call a 16-bit routine taking only standard argument types
466 * (WORD and LONG), you can also have an appropriate argument conversion
467 * stub automatically generated (see BuildCallTo16); you'd then call this
468 * stub, which in turn would prepare the 16-bit stack and call the appropiate
472 static void BuildCallTo16Core( FILE *outfile, int short_ret, int reg_func )
474 char *name = reg_func == 2 ? "regs_long" :
475 reg_func == 1 ? "regs_short" :
476 short_ret? "word" : "long";
478 /* Function header */
479 if (reg_func == 2) function_header( outfile, "wine_call_to_16_regs_long" );
480 else if (reg_func == 1) function_header( outfile, "wine_call_to_16_regs_short" );
481 else if (short_ret) function_header( outfile, "wine_call_to_16_word" );
482 else function_header( outfile, "wine_call_to_16_long" );
484 /* Function entry sequence */
485 fprintf( outfile, "\tpushl %%ebp\n" );
486 fprintf( outfile, "\tmovl %%esp, %%ebp\n" );
488 /* Save the 32-bit registers */
489 fprintf( outfile, "\tpushl %%ebx\n" );
490 fprintf( outfile, "\tpushl %%ecx\n" );
491 fprintf( outfile, "\tpushl %%edx\n" );
492 fprintf( outfile, "\tpushl %%esi\n" );
493 fprintf( outfile, "\tpushl %%edi\n" );
497 /* Get Global Offset Table into %ebx */
498 fprintf( outfile, "\tcall .Lwine_call_to_16_%s.getgot1\n", name );
499 fprintf( outfile, ".Lwine_call_to_16_%s.getgot1:\n", name );
500 fprintf( outfile, "\tpopl %%ebx\n" );
501 fprintf( outfile, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-.Lwine_call_to_16_%s.getgot1], %%ebx\n", name );
504 /* Print debugging info */
507 /* Push flags, number of arguments, and target */
508 fprintf( outfile, "\tpushl $%d\n", reg_func );
509 fprintf( outfile, "\tpushl 12(%%ebp)\n" );
510 fprintf( outfile, "\tpushl 8(%%ebp)\n" );
513 fprintf( outfile, "\tcall " __ASM_NAME("RELAY_DebugCallTo16@PLT") "\n" );
515 fprintf( outfile, "\tcall " __ASM_NAME("RELAY_DebugCallTo16") "\n" );
517 fprintf( outfile, "\taddl $12, %%esp\n" );
520 /* Enter Win16 Mutex */
522 fprintf( outfile, "\tcall " __ASM_NAME("_EnterWin16Lock@PLT") "\n" );
524 fprintf( outfile, "\tcall " __ASM_NAME("_EnterWin16Lock") "\n" );
526 /* Setup exception frame */
527 fprintf( outfile, "\t.byte 0x64\n\tpushl (%d)\n", STACKOFFSET );
529 fprintf( outfile, "\tpushl " __ASM_NAME("__wine_callto16_handler@GOT") "(%%ebx)\n" );
531 fprintf( outfile, "\tpushl $" __ASM_NAME("__wine_callto16_handler") "\n" );
532 fprintf( outfile, "\t.byte 0x64\n\tpushl (%d)\n", STRUCTOFFSET(TEB,except) );
533 fprintf( outfile, "\t.byte 0x64\n\tmovl %%esp,(%d)\n", STRUCTOFFSET(TEB,except) );
535 /* Get return address */
538 fprintf( outfile, "\tmovl " __ASM_NAME("CallTo16_RetAddr@GOT") "(%%ebx), %%ecx\n" );
539 fprintf( outfile, "\tmovl (%%ecx), %%ecx\n" );
542 fprintf( outfile, "\tmovl " __ASM_NAME("CallTo16_RetAddr") ", %%ecx\n" );
544 /* Call the actual CallTo16 routine (simulate a lcall) */
545 fprintf( outfile, "\tpushl %%cs\n" );
546 fprintf( outfile, "\tcall .Lwine_call_to_16_%s\n", reg_func ? name : "long" );
548 /* Remove exception frame */
549 fprintf( outfile, "\t.byte 0x64\n\tpopl (%d)\n", STRUCTOFFSET(TEB,except) );
550 fprintf( outfile, "\taddl $4, %%esp\n" );
551 fprintf( outfile, "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
555 /* Convert and push return value */
558 fprintf( outfile, "\tmovzwl %%ax, %%eax\n" );
559 fprintf( outfile, "\tpushl %%eax\n" );
563 fprintf( outfile, "\tshll $16,%%edx\n" );
564 fprintf( outfile, "\tmovw %%ax,%%dx\n" );
565 fprintf( outfile, "\tpushl %%edx\n" );
571 * Modify CONTEXT86 structure to contain new values
573 * NOTE: We restore only EAX, EBX, EDX, EDX, EBP, and ESP.
574 * The segment registers as well as ESI and EDI should
575 * not be modified by a well-behaved 16-bit routine in
576 * any case. [If necessary, we could restore them as well,
577 * at the cost of a somewhat less efficient return path.]
580 fprintf( outfile, "\tmovl %d(%%esp), %%edi\n", STACK32OFFSET(target) - STACK32OFFSET(edi));
581 /* everything above edi has been popped already */
583 fprintf( outfile, "\tmovl %%eax, %d(%%edi)\n", CONTEXTOFFSET(Eax) );
584 fprintf( outfile, "\tmovl %%ebx, %d(%%edi)\n", CONTEXTOFFSET(Ebx) );
585 fprintf( outfile, "\tmovl %%ecx, %d(%%edi)\n", CONTEXTOFFSET(Ecx) );
586 fprintf( outfile, "\tmovl %%edx, %d(%%edi)\n", CONTEXTOFFSET(Edx) );
587 fprintf( outfile, "\tmovl %%ebp, %d(%%edi)\n", CONTEXTOFFSET(Ebp) );
588 fprintf( outfile, "\tmovl %%esi, %d(%%edi)\n", CONTEXTOFFSET(Esp) );
589 /* The return glue code saved %esp into %esi */
591 fprintf( outfile, "\tpushl %%edi\n" );
596 /* Get Global Offset Table into %ebx (might have been overwritten) */
597 fprintf( outfile, "\tcall .Lwine_call_to_16_%s.getgot2\n", name );
598 fprintf( outfile, ".Lwine_call_to_16_%s.getgot2:\n", name );
599 fprintf( outfile, "\tpopl %%ebx\n" );
600 fprintf( outfile, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-.Lwine_call_to_16_%s.getgot2], %%ebx\n", name );
603 /* Leave Win16 Mutex */
605 fprintf( outfile, "\tcall " __ASM_NAME("_LeaveWin16Lock@PLT") "\n" );
607 fprintf( outfile, "\tcall " __ASM_NAME("_LeaveWin16Lock") "\n" );
609 /* Print debugging info */
612 fprintf( outfile, "\tpushl $%d\n", reg_func );
615 fprintf( outfile, "\tcall " __ASM_NAME("RELAY_DebugCallTo16Ret@PLT") "\n" );
617 fprintf( outfile, "\tcall " __ASM_NAME("RELAY_DebugCallTo16Ret") "\n" );
619 fprintf( outfile, "\taddl $4, %%esp\n" );
622 /* Get return value */
623 fprintf( outfile, "\tpopl %%eax\n" );
625 /* Restore the 32-bit registers */
626 fprintf( outfile, "\tpopl %%edi\n" );
627 fprintf( outfile, "\tpopl %%esi\n" );
628 fprintf( outfile, "\tpopl %%edx\n" );
629 fprintf( outfile, "\tpopl %%ecx\n" );
630 fprintf( outfile, "\tpopl %%ebx\n" );
632 /* Function exit sequence */
633 fprintf( outfile, "\tpopl %%ebp\n" );
634 fprintf( outfile, "\tret $8\n" );
637 /* Start of the actual CallTo16 routine */
639 if (!reg_func && short_ret) return; /* call_to_16_word uses call_to_16_long backend routine */
641 fprintf( outfile, ".Lwine_call_to_16_%s:\n", name );
643 /* Switch to the 16-bit stack */
644 fprintf( outfile, "\tmovl %%esp,%%edx\n" );
646 fprintf( outfile,"\tdata16\n");
648 fprintf( outfile, "\t.byte 0x64\n\tmovw (%d),%%ss\n", STACKOFFSET + 2);
649 fprintf( outfile, "\t.byte 0x64\n\tmovw (%d),%%sp\n", STACKOFFSET );
650 fprintf( outfile, "\t.byte 0x64\n\tmovl %%edx,(%d)\n", STACKOFFSET );
652 /* Make %bp point to the previous stackframe (built by CallFrom16) */
653 fprintf( outfile, "\tmovzwl %%sp,%%ebp\n" );
654 fprintf( outfile, "\tleal %d(%%ebp),%%ebp\n", STACK16OFFSET(bp) );
656 /* Add the specified offset to the new sp */
657 fprintf( outfile, "\tsubw %d(%%edx), %%sp\n", STACK32OFFSET(nb_args) );
659 /* Push the return address
660 * With sreg suffix, we push 16:16 address (normal lret)
661 * With lreg suffix, we push 16:32 address (0x66 lret, for KERNEL32_45)
664 fprintf( outfile, "\tpushl %%ecx\n" );
667 fprintf( outfile, "\tshldl $16, %%ecx, %%eax\n" );
668 fprintf( outfile, "\tpushw $0\n" );
669 fprintf( outfile, "\tpushw %%ax\n" );
670 fprintf( outfile, "\tpushw $0\n" );
671 fprintf( outfile, "\tpushw %%cx\n" );
676 /* Push the called routine address */
677 fprintf( outfile, "\tmovl %d(%%edx),%%edx\n", STACK32OFFSET(target) );
678 fprintf( outfile, "\tpushw %d(%%edx)\n", CONTEXTOFFSET(SegCs) );
679 fprintf( outfile, "\tpushw %d(%%edx)\n", CONTEXTOFFSET(Eip) );
681 /* Get the registers */
682 fprintf( outfile, "\tpushw %d(%%edx)\n", CONTEXTOFFSET(SegDs) );
683 fprintf( outfile, "\tmovl %d(%%edx),%%eax\n", CONTEXTOFFSET(SegEs) );
684 fprintf( outfile, "\tmovw %%ax,%%es\n" );
685 fprintf( outfile, "\tmovl %d(%%edx),%%eax\n", CONTEXTOFFSET(SegFs) );
686 fprintf( outfile, "\tmovw %%ax,%%fs\n" );
687 fprintf( outfile, "\tmovl %d(%%edx),%%ebp\n", CONTEXTOFFSET(Ebp) );
688 fprintf( outfile, "\tmovl %d(%%edx),%%esi\n", CONTEXTOFFSET(Esi) );
689 fprintf( outfile, "\tmovl %d(%%edx),%%edi\n", CONTEXTOFFSET(Edi) );
690 fprintf( outfile, "\tmovl %d(%%edx),%%eax\n", CONTEXTOFFSET(Eax) );
691 fprintf( outfile, "\tmovl %d(%%edx),%%ebx\n", CONTEXTOFFSET(Ebx) );
692 fprintf( outfile, "\tmovl %d(%%edx),%%ecx\n", CONTEXTOFFSET(Ecx) );
693 fprintf( outfile, "\tmovl %d(%%edx),%%edx\n", CONTEXTOFFSET(Edx) );
695 /* Get the 16-bit ds */
696 fprintf( outfile, "\tpopw %%ds\n" );
698 else /* not a register function */
700 /* Push the called routine address */
701 fprintf( outfile, "\tpushl %d(%%edx)\n", STACK32OFFSET(target) );
703 /* Set %fs to the value saved by the last CallFrom16 */
704 fprintf( outfile, "\tmovw %d(%%ebp),%%ax\n", STACK16OFFSET(fs)-STACK16OFFSET(bp) );
705 fprintf( outfile, "\tmovw %%ax,%%fs\n" );
707 /* Set %ds and %es (and %ax just in case) equal to %ss */
708 fprintf( outfile, "\tmovw %%ss,%%ax\n" );
709 fprintf( outfile, "\tmovw %%ax,%%ds\n" );
710 fprintf( outfile, "\tmovw %%ax,%%es\n" );
713 /* Jump to the called routine */
714 fprintf( outfile, "\t.byte 0x66\n" );
715 fprintf( outfile, "\tlret\n" );
719 /*******************************************************************
722 * Build the return code for 16-bit callbacks
724 static void BuildRet16Func( FILE *outfile )
727 * Note: This must reside in the .data section to allow
728 * run-time relocation of the SYSLEVEL_Win16CurrentTeb symbol
731 function_header( outfile, "CallTo16_Ret" );
733 /* Save %esp into %esi */
734 fprintf( outfile, "\tmovl %%esp,%%esi\n" );
736 /* Restore 32-bit segment registers */
738 fprintf( outfile, "\t.byte 0x2e\n\tmovl " __ASM_NAME("CallTo16_DataSelector") "-" __ASM_NAME("Call16_Ret_Start") ",%%edi\n" );
740 fprintf( outfile, "\tdata16\n");
742 fprintf( outfile, "\tmovw %%di,%%ds\n" );
744 fprintf( outfile, "\tdata16\n");
746 fprintf( outfile, "\tmovw %%di,%%es\n" );
748 fprintf( outfile, "\tmovw " __ASM_NAME("SYSLEVEL_Win16CurrentTeb") ",%%fs\n" );
750 /* Restore the 32-bit stack */
753 fprintf( outfile, "\tdata16\n");
755 fprintf( outfile, "\tmovw %%di,%%ss\n" );
756 fprintf( outfile, "\t.byte 0x64\n\tmovl (%d),%%esp\n", STACKOFFSET );
758 /* Return to caller */
760 fprintf( outfile, "\tlret\n" );
762 /* Declare the return address and data selector variables */
764 fprintf( outfile, "\n\t.align %d\n", get_alignment(4) );
765 fprintf( outfile, "\t.globl " __ASM_NAME("CallTo16_DataSelector") "\n" );
766 fprintf( outfile, __ASM_NAME("CallTo16_DataSelector") ":\t.long 0\n" );
767 fprintf( outfile, "\t.globl " __ASM_NAME("CallTo16_RetAddr") "\n" );
768 fprintf( outfile, __ASM_NAME("CallTo16_RetAddr") ":\t.long 0\n" );
772 /*******************************************************************
773 * BuildCallTo32CBClient
775 * Call a CBClient relay stub from 32-bit code (KERNEL.620).
777 * Since the relay stub is itself 32-bit, this should not be a problem;
778 * unfortunately, the relay stubs are expected to switch back to a
779 * 16-bit stack (and 16-bit code) after completion :-(
781 * This would conflict with our 16- vs. 32-bit stack handling, so
782 * we simply switch *back* to our 32-bit stack before returning to
785 * The CBClient relay stub expects to be called with the following
786 * 16-bit stack layout, and with ebp and ebx pointing into the 16-bit
787 * stack at the designated places:
790 * (ebp+14) original arguments to the callback routine
791 * (ebp+10) far return address to original caller
792 * (ebp+6) Thunklet target address
793 * (ebp+2) Thunklet relay ID code
794 * (ebp) BP (saved by CBClientGlueSL)
795 * (ebp-2) SI (saved by CBClientGlueSL)
796 * (ebp-4) DI (saved by CBClientGlueSL)
797 * (ebp-6) DS (saved by CBClientGlueSL)
799 * ... buffer space used by the 16-bit side glue for temp copies
801 * (ebx+4) far return address to 16-bit side glue code
802 * (ebx) saved 16-bit ss:sp (pointing to ebx+4)
804 * The 32-bit side glue code accesses both the original arguments (via ebp)
805 * and the temporary copies prepared by the 16-bit side glue (via ebx).
806 * After completion, the stub will load ss:sp from the buffer at ebx
807 * and perform a far return to 16-bit code.
809 * To trick the relay stub into returning to us, we replace the 16-bit
810 * return address to the glue code by a cs:ip pair pointing to our
811 * return entry point (the original return address is saved first).
812 * Our return stub thus called will then reload the 32-bit ss:esp and
813 * return to 32-bit code (by using and ss:esp value that we have also
814 * pushed onto the 16-bit stack before and a cs:eip values found at
815 * that position on the 32-bit stack). The ss:esp to be restored is
816 * found relative to the 16-bit stack pointer at:
819 * (ebx-8) sp (32-bit stack pointer)
821 * The second variant of this routine, CALL32_CBClientEx, which is used
822 * to implement KERNEL.621, has to cope with yet another problem: Here,
823 * the 32-bit side directly returns to the caller of the CBClient thunklet,
824 * restoring registers saved by CBClientGlueSL and cleaning up the stack.
825 * As we have to return to our 32-bit code first, we have to adapt the
826 * layout of our temporary area so as to include values for the registers
827 * that are to be restored, and later (in the implementation of KERNEL.621)
828 * we *really* restore them. The return stub restores DS, DI, SI, and BP
829 * from the stack, skips the next 8 bytes (CBClient relay code / target),
830 * and then performs a lret NN, where NN is the number of arguments to be
831 * removed. Thus, we prepare our temporary area as follows:
833 * (ebx+22) 16-bit cs (this segment)
834 * (ebx+20) 16-bit ip ('16-bit' return entry point)
835 * (ebx+16) 32-bit ss (flat)
836 * (ebx+12) 32-bit sp (32-bit stack pointer)
837 * (ebx+10) 16-bit bp (points to ebx+24)
838 * (ebx+8) 16-bit si (ignored)
839 * (ebx+6) 16-bit di (ignored)
840 * (ebx+4) 16-bit ds (we actually use the flat DS here)
841 * (ebx+2) 16-bit ss (16-bit stack segment)
842 * (ebx+0) 16-bit sp (points to ebx+4)
844 * Note that we ensure that DS is not changed and remains the flat segment,
845 * and the 32-bit stack pointer our own return stub needs fits just
846 * perfectly into the 8 bytes that are skipped by the Windows stub.
847 * One problem is that we have to determine the number of removed arguments,
848 * as these have to be really removed in KERNEL.621. Thus, the BP value
849 * that we place in the temporary area to be restored, contains the value
850 * that SP would have if no arguments were removed. By comparing the actual
851 * value of SP with this value in our return stub we can compute the number
852 * of removed arguments. This is then returned to KERNEL.621.
854 * The stack layout of this function:
855 * (ebp+20) nArgs pointer to variable receiving nr. of args (Ex only)
856 * (ebp+16) esi pointer to caller's esi value
857 * (ebp+12) arg ebp value to be set for relay stub
858 * (ebp+8) func CBClient relay stub address
862 static void BuildCallTo32CBClient( FILE *outfile, BOOL isEx )
864 char *name = isEx? "CBClientEx" : "CBClient";
865 int size = isEx? 24 : 12;
867 /* Function header */
869 fprintf( outfile, "\n\t.align %d\n", get_alignment(4) );
871 fprintf( outfile, ".stabs \"CALL32_%s:F1\",36,0,0," __ASM_NAME("CALL32_%s") "\n",
873 fprintf( outfile, "\t.globl " __ASM_NAME("CALL32_%s") "\n", name );
874 fprintf( outfile, __ASM_NAME("CALL32_%s") ":\n", name );
878 fprintf( outfile, "\tpushl %%ebp\n" );
879 fprintf( outfile, "\tmovl %%esp,%%ebp\n" );
880 fprintf( outfile, "\tpushl %%edi\n" );
881 fprintf( outfile, "\tpushl %%esi\n" );
882 fprintf( outfile, "\tpushl %%ebx\n" );
884 /* Get the 16-bit stack */
886 fprintf( outfile, "\t.byte 0x64\n\tmovl (%d),%%ebx\n", STACKOFFSET);
888 /* Convert it to a flat address */
890 fprintf( outfile, "\tshldl $16,%%ebx,%%eax\n" );
891 fprintf( outfile, "\tandl $0xfff8,%%eax\n" );
892 fprintf( outfile, "\tshrl $1,%%eax\n" );
893 fprintf( outfile, "\tmovl " __ASM_NAME("wine_ldt_copy") "(%%eax),%%esi\n" );
894 fprintf( outfile, "\tmovw %%bx,%%ax\n" );
895 fprintf( outfile, "\taddl %%eax,%%esi\n" );
897 /* Allocate temporary area (simulate STACK16_PUSH) */
899 fprintf( outfile, "\tpushf\n" );
900 fprintf( outfile, "\tcld\n" );
901 fprintf( outfile, "\tleal -%d(%%esi), %%edi\n", size );
902 fprintf( outfile, "\tmovl $%d, %%ecx\n", sizeof(STACK16FRAME) );
903 fprintf( outfile, "\trep\n\tmovsb\n" );
904 fprintf( outfile, "\tpopf\n" );
906 fprintf( outfile, "\t.byte 0x64\n\tsubw $%d,(%d)\n", size, STACKOFFSET );
908 fprintf( outfile, "\tpushl %%edi\n" ); /* remember address */
910 /* Set up temporary area */
914 fprintf( outfile, "\tleal 4(%%edi), %%edi\n" );
916 fprintf( outfile, "\tleal -8(%%esp), %%eax\n" );
917 fprintf( outfile, "\tmovl %%eax, -8(%%edi)\n" ); /* 32-bit sp */
919 fprintf( outfile, "\tmovw %%ss, %%ax\n" );
920 fprintf( outfile, "\tandl $0x0000ffff, %%eax\n" );
921 fprintf( outfile, "\tmovl %%eax, -4(%%edi)\n" ); /* 32-bit ss */
923 fprintf( outfile, "\taddl $%d, %%ebx\n", sizeof(STACK16FRAME)-size+4 + 4 );
924 fprintf( outfile, "\tmovl %%ebx, 0(%%edi)\n" ); /* 16-bit ss:sp */
926 fprintf( outfile, "\tmovl " __ASM_NAME("CALL32_%s_RetAddr") ", %%eax\n", name );
927 fprintf( outfile, "\tmovl %%eax, 4(%%edi)\n" ); /* overwrite return address */
931 fprintf( outfile, "\taddl $%d, %%ebx\n", sizeof(STACK16FRAME)-size+4 );
932 fprintf( outfile, "\tmovl %%ebx, 0(%%edi)\n" );
934 fprintf( outfile, "\tmovw %%ds, %%ax\n" );
935 fprintf( outfile, "\tmovw %%ax, 4(%%edi)\n" );
937 fprintf( outfile, "\taddl $20, %%ebx\n" );
938 fprintf( outfile, "\tmovw %%bx, 10(%%edi)\n" );
940 fprintf( outfile, "\tleal -8(%%esp), %%eax\n" );
941 fprintf( outfile, "\tmovl %%eax, 12(%%edi)\n" );
943 fprintf( outfile, "\tmovw %%ss, %%ax\n" );
944 fprintf( outfile, "\tandl $0x0000ffff, %%eax\n" );
945 fprintf( outfile, "\tmovl %%eax, 16(%%edi)\n" );
947 fprintf( outfile, "\tmovl " __ASM_NAME("CALL32_%s_RetAddr") ", %%eax\n", name );
948 fprintf( outfile, "\tmovl %%eax, 20(%%edi)\n" );
951 /* Set up registers and call CBClient relay stub (simulating a far call) */
953 fprintf( outfile, "\tmovl 16(%%ebp), %%esi\n" );
954 fprintf( outfile, "\tmovl (%%esi), %%esi\n" );
956 fprintf( outfile, "\tmovl %%edi, %%ebx\n" );
957 fprintf( outfile, "\tmovl 8(%%ebp), %%eax\n" );
958 fprintf( outfile, "\tmovl 12(%%ebp), %%ebp\n" );
960 fprintf( outfile, "\tpushl %%cs\n" );
961 fprintf( outfile, "\tcall *%%eax\n" );
963 /* Return new esi value to caller */
965 fprintf( outfile, "\tmovl 32(%%esp), %%edi\n" );
966 fprintf( outfile, "\tmovl %%esi, (%%edi)\n" );
968 /* Cleanup temporary area (simulate STACK16_POP) */
970 fprintf( outfile, "\tpop %%esi\n" );
972 fprintf( outfile, "\tpushf\n" );
973 fprintf( outfile, "\tstd\n" );
974 fprintf( outfile, "\tdec %%esi\n" );
975 fprintf( outfile, "\tleal %d(%%esi), %%edi\n", size );
976 fprintf( outfile, "\tmovl $%d, %%ecx\n", sizeof(STACK16FRAME) );
977 fprintf( outfile, "\trep\n\tmovsb\n" );
978 fprintf( outfile, "\tpopf\n" );
980 fprintf( outfile, "\t.byte 0x64\n\taddw $%d,(%d)\n", size, STACKOFFSET );
982 /* Return argument size to caller */
985 fprintf( outfile, "\tmovl 32(%%esp), %%ebx\n" );
986 fprintf( outfile, "\tmovl %%ebp, (%%ebx)\n" );
989 /* Restore registers and return */
991 fprintf( outfile, "\tpopl %%ebx\n" );
992 fprintf( outfile, "\tpopl %%esi\n" );
993 fprintf( outfile, "\tpopl %%edi\n" );
994 fprintf( outfile, "\tpopl %%ebp\n" );
995 fprintf( outfile, "\tret\n" );
998 static void BuildCallTo32CBClientRet( FILE *outfile, BOOL isEx )
1000 char *name = isEx? "CBClientEx" : "CBClient";
1002 /* '16-bit' return stub */
1004 fprintf( outfile, "\n\t.globl " __ASM_NAME("CALL32_%s_Ret") "\n", name );
1005 fprintf( outfile, __ASM_NAME("CALL32_%s_Ret") ":\n", name );
1009 fprintf( outfile, "\tmovzwl %%sp, %%ebx\n" );
1010 fprintf( outfile, "\tlssl %%ss:-16(%%ebx), %%esp\n" );
1014 fprintf( outfile, "\tmovzwl %%bp, %%ebx\n" );
1015 fprintf( outfile, "\tsubw %%bp, %%sp\n" );
1016 fprintf( outfile, "\tmovzwl %%sp, %%ebp\n" );
1017 fprintf( outfile, "\tlssl %%ss:-12(%%ebx), %%esp\n" );
1019 fprintf( outfile, "\tlret\n" );
1021 /* Declare the return address variable */
1023 fprintf( outfile, "\n\t.globl " __ASM_NAME("CALL32_%s_RetAddr") "\n", name );
1024 fprintf( outfile, __ASM_NAME("CALL32_%s_RetAddr") ":\t.long 0\n", name );
1028 /*******************************************************************
1029 * BuildCallFrom32Regs
1031 * Build a 32-bit-to-Wine call-back function for a 'register' function.
1032 * 'args' is the number of dword arguments.
1036 * (ebp+12) first arg
1037 * (ebp+8) ret addr to user code
1038 * (ebp+4) ret addr to relay code
1040 * (ebp-128) buffer area to allow stack frame manipulation
1041 * (ebp-332) CONTEXT86 struct
1042 * (ebp-336) CONTEXT86 *argument
1043 * .... other arguments copied from (ebp+12)
1045 * The entry point routine is called with a CONTEXT* extra argument,
1046 * following the normal args. In this context structure, EIP_reg
1047 * contains the return address to user code, and ESP_reg the stack
1048 * pointer on return (with the return address and arguments already
1051 static void BuildCallFrom32Regs( FILE *outfile )
1053 static const int STACK_SPACE = 128 + sizeof(CONTEXT86);
1055 /* Function header */
1057 function_header( outfile, "__wine_call_from_32_regs" );
1059 /* Allocate some buffer space on the stack */
1061 fprintf( outfile, "\tpushl %%ebp\n" );
1062 fprintf( outfile, "\tmovl %%esp,%%ebp\n ");
1063 fprintf( outfile, "\tleal -%d(%%esp), %%esp\n", STACK_SPACE );
1065 /* Build the context structure */
1067 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Eax) - STACK_SPACE );
1068 fprintf( outfile, "\tpushfl\n" );
1069 fprintf( outfile, "\tpopl %%eax\n" );
1070 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(EFlags) - STACK_SPACE );
1071 fprintf( outfile, "\tmovl 0(%%ebp),%%eax\n" );
1072 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Ebp) - STACK_SPACE );
1073 fprintf( outfile, "\tmovl %%ebx,%d(%%ebp)\n", CONTEXTOFFSET(Ebx) - STACK_SPACE );
1074 fprintf( outfile, "\tmovl %%ecx,%d(%%ebp)\n", CONTEXTOFFSET(Ecx) - STACK_SPACE );
1075 fprintf( outfile, "\tmovl %%edx,%d(%%ebp)\n", CONTEXTOFFSET(Edx) - STACK_SPACE );
1076 fprintf( outfile, "\tmovl %%esi,%d(%%ebp)\n", CONTEXTOFFSET(Esi) - STACK_SPACE );
1077 fprintf( outfile, "\tmovl %%edi,%d(%%ebp)\n", CONTEXTOFFSET(Edi) - STACK_SPACE );
1079 fprintf( outfile, "\txorl %%eax,%%eax\n" );
1080 fprintf( outfile, "\tmovw %%cs,%%ax\n" );
1081 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegCs) - STACK_SPACE );
1082 fprintf( outfile, "\tmovw %%es,%%ax\n" );
1083 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegEs) - STACK_SPACE );
1084 fprintf( outfile, "\tmovw %%fs,%%ax\n" );
1085 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegFs) - STACK_SPACE );
1086 fprintf( outfile, "\tmovw %%gs,%%ax\n" );
1087 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegGs) - STACK_SPACE );
1088 fprintf( outfile, "\tmovw %%ss,%%ax\n" );
1089 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegSs) - STACK_SPACE );
1090 fprintf( outfile, "\tmovw %%ds,%%ax\n" );
1091 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegDs) - STACK_SPACE );
1092 fprintf( outfile, "\tmovw %%ax,%%es\n" ); /* set %es equal to %ds just in case */
1094 fprintf( outfile, "\tmovl $0x%x,%%eax\n", CONTEXT86_FULL );
1095 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(ContextFlags) - STACK_SPACE );
1097 fprintf( outfile, "\tmovl 8(%%ebp),%%eax\n" ); /* Get %eip at time of call */
1098 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Eip) - STACK_SPACE );
1100 /* Transfer the arguments */
1102 fprintf( outfile, "\tmovl 4(%%ebp),%%ebx\n" ); /* get relay code addr */
1103 fprintf( outfile, "\tpushl %%esp\n" ); /* push ptr to context struct */
1104 fprintf( outfile, "\tmovzbl 4(%%ebx),%%ecx\n" ); /* fetch number of args to copy */
1105 fprintf( outfile, "\tjecxz 1f\n" );
1106 fprintf( outfile, "\tsubl %%ecx,%%esp\n" );
1107 fprintf( outfile, "\tleal 12(%%ebp),%%esi\n" ); /* get %esp at time of call */
1108 fprintf( outfile, "\tmovl %%esp,%%edi\n" );
1109 fprintf( outfile, "\tshrl $2,%%ecx\n" );
1110 fprintf( outfile, "\tcld\n" );
1111 fprintf( outfile, "\trep\n\tmovsl\n" ); /* copy args */
1113 fprintf( outfile, "1:\tmovzbl 5(%%ebx),%%eax\n" ); /* fetch number of args to remove */
1114 fprintf( outfile, "\tleal 12(%%ebp,%%eax),%%eax\n" );
1115 fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Esp) - STACK_SPACE );
1117 /* Call the entry point */
1119 fprintf( outfile, "\tcall *0(%%ebx)\n" );
1121 /* Store %eip and %ebp onto the new stack */
1123 fprintf( outfile, "\tmovl %d(%%ebp),%%edx\n", CONTEXTOFFSET(Esp) - STACK_SPACE );
1124 fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(Eip) - STACK_SPACE );
1125 fprintf( outfile, "\tmovl %%eax,-4(%%edx)\n" );
1126 fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(Ebp) - STACK_SPACE );
1127 fprintf( outfile, "\tmovl %%eax,-8(%%edx)\n" );
1129 /* Restore the context structure */
1131 /* Note: we don't bother to restore %cs, %ds and %ss
1132 * changing them in 32-bit code is a recipe for disaster anyway
1134 fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(SegEs) - STACK_SPACE );
1135 fprintf( outfile, "\tmovw %%ax,%%es\n" );
1136 fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(SegFs) - STACK_SPACE );
1137 fprintf( outfile, "\tmovw %%ax,%%fs\n" );
1138 fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(SegGs) - STACK_SPACE );
1139 fprintf( outfile, "\tmovw %%ax,%%gs\n" );
1141 fprintf( outfile, "\tmovl %d(%%ebp),%%edi\n", CONTEXTOFFSET(Edi) - STACK_SPACE );
1142 fprintf( outfile, "\tmovl %d(%%ebp),%%esi\n", CONTEXTOFFSET(Esi) - STACK_SPACE );
1143 fprintf( outfile, "\tmovl %d(%%ebp),%%edx\n", CONTEXTOFFSET(Edx) - STACK_SPACE );
1144 fprintf( outfile, "\tmovl %d(%%ebp),%%ecx\n", CONTEXTOFFSET(Ecx) - STACK_SPACE );
1145 fprintf( outfile, "\tmovl %d(%%ebp),%%ebx\n", CONTEXTOFFSET(Ebx) - STACK_SPACE );
1147 fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(EFlags) - STACK_SPACE );
1148 fprintf( outfile, "\tpushl %%eax\n" );
1149 fprintf( outfile, "\tpopfl\n" );
1150 fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(Eax) - STACK_SPACE );
1152 fprintf( outfile, "\tmovl %d(%%ebp),%%ebp\n", CONTEXTOFFSET(Esp) - STACK_SPACE );
1153 fprintf( outfile, "\tleal -8(%%ebp),%%esp\n" );
1154 fprintf( outfile, "\tpopl %%ebp\n" );
1155 fprintf( outfile, "\tret\n" );
1159 /*******************************************************************
1162 * Build all the 16-bit relay callbacks
1164 void BuildRelays16( FILE *outfile )
1170 fprintf( outfile, "/* File generated automatically. Do not edit! */\n\n" );
1171 fprintf( outfile, "\t.text\n" );
1173 if (output_file_name && use_stabs)
1175 getcwd(buffer, sizeof(buffer));
1176 fprintf( outfile, "\t.file\t\"%s\"\n", output_file_name );
1179 * The stabs help the internal debugger as they are an indication that it
1180 * is sensible to step into a thunk/trampoline.
1182 fprintf( outfile, ".stabs \"%s/\",100,0,0,Code_Start\n", buffer);
1183 fprintf( outfile, ".stabs \"%s\",100,0,0,Code_Start\n", output_file_name );
1184 fprintf( outfile, "Code_Start:\n\n" );
1187 fprintf( outfile, __ASM_NAME("Call16_Start") ":\n" );
1188 fprintf( outfile, "\t.globl " __ASM_NAME("Call16_Start") "\n" );
1189 fprintf( outfile, "\t.byte 0\n\n" );
1191 /* Standard CallFrom16 routine (WORD return) */
1192 BuildCallFrom16Core( outfile, FALSE, FALSE, TRUE );
1194 /* Standard CallFrom16 routine (DWORD return) */
1195 BuildCallFrom16Core( outfile, FALSE, FALSE, FALSE );
1197 /* Register CallFrom16 routine */
1198 BuildCallFrom16Core( outfile, TRUE, FALSE, FALSE );
1200 /* C16ThkSL CallFrom16 routine */
1201 BuildCallFrom16Core( outfile, FALSE, TRUE, FALSE );
1203 /* Standard CallTo16 routine (WORD return) */
1204 BuildCallTo16Core( outfile, TRUE, FALSE );
1206 /* Standard CallTo16 routine (DWORD return) */
1207 BuildCallTo16Core( outfile, FALSE, FALSE );
1209 /* Register CallTo16 routine (16:16 retf) */
1210 BuildCallTo16Core( outfile, FALSE, 1 );
1212 /* Register CallTo16 routine (16:32 retf) */
1213 BuildCallTo16Core( outfile, FALSE, 2 );
1215 /* CBClientThunkSL routine */
1216 BuildCallTo32CBClient( outfile, FALSE );
1218 /* CBClientThunkSLEx routine */
1219 BuildCallTo32CBClient( outfile, TRUE );
1221 fprintf( outfile, __ASM_NAME("Call16_End") ":\n" );
1222 fprintf( outfile, "\t.globl " __ASM_NAME("Call16_End") "\n" );
1226 fprintf( outfile, "\t.stabs \"\",100,0,0,.Letext\n");
1227 fprintf( outfile, ".Letext:\n");
1229 /* Some versions of gdb need to have the filename data for
1230 each section, so output it again for the data section. */
1231 if (output_file_name)
1233 fprintf( outfile, ".stabs \"%s/\",100,0,0,Data_Start\n", buffer);
1234 fprintf( outfile, ".stabs \"%s\",100,0,0,Data_Start\n", output_file_name );
1235 fprintf( outfile, "Data_Start:\n\n" );
1239 /* The whole Call16_Ret segment must lie within the .data section */
1240 fprintf( outfile, "\n\t.data\n" );
1241 fprintf( outfile, "\t.globl " __ASM_NAME("Call16_Ret_Start") "\n" );
1242 fprintf( outfile, __ASM_NAME("Call16_Ret_Start") ":\n" );
1244 /* Standard CallTo16 return stub */
1245 BuildRet16Func( outfile );
1247 /* CBClientThunkSL return stub */
1248 BuildCallTo32CBClientRet( outfile, FALSE );
1250 /* CBClientThunkSLEx return stub */
1251 BuildCallTo32CBClientRet( outfile, TRUE );
1253 /* End of Call16_Ret segment */
1254 fprintf( outfile, "\n\t.globl " __ASM_NAME("Call16_Ret_End") "\n" );
1255 fprintf( outfile, __ASM_NAME("Call16_Ret_End") ":\n" );
1258 /*******************************************************************
1261 * Build all the 32-bit relay callbacks
1263 void BuildRelays32( FILE *outfile )
1267 fprintf( outfile, "/* File generated automatically. Do not edit! */\n\n" );
1268 fprintf( outfile, "\t.text\n" );
1270 if (output_file_name && use_stabs)
1273 getcwd(buffer, sizeof(buffer));
1274 fprintf( outfile, "\t.file\t\"%s\"\n", output_file_name );
1277 * The stabs help the internal debugger as they are an indication that it
1278 * is sensible to step into a thunk/trampoline.
1280 fprintf( outfile, ".stabs \"%s/\",100,0,0,Code_Start\n", buffer);
1281 fprintf( outfile, ".stabs \"%s\",100,0,0,Code_Start\n", output_file_name );
1282 fprintf( outfile, "Code_Start:\n\n" );
1285 /* 32-bit register entry point */
1286 BuildCallFrom32Regs( outfile );
1290 fprintf( outfile, "\t.stabs \"\",100,0,0,.Letext\n");
1291 fprintf( outfile, ".Letext:\n");
1295 #else /* __i386__ */
1297 void BuildRelays16( FILE *outfile )
1299 fprintf( outfile, "/* File not used with this architecture. Do not edit! */\n\n" );
1302 void BuildRelays32( FILE *outfile )
1304 fprintf( outfile, "/* File not used with this architecture. Do not edit! */\n\n" );
1307 #endif /* __i386__ */