/js/src/ctypes/libffi/src/x86/sysv.S

  1/* -----------------------------------------------------------------------
  2   sysv.S - Copyright (c) 1996, 1998, 2001-2003, 2005, 2008, 2010  Red Hat, Inc.
  3   
  4   X86 Foreign Function Interface 
  5
  6   Permission is hereby granted, free of charge, to any person obtaining
  7   a copy of this software and associated documentation files (the
  8   ``Software''), to deal in the Software without restriction, including
  9   without limitation the rights to use, copy, modify, merge, publish,
 10   distribute, sublicense, and/or sell copies of the Software, and to
 11   permit persons to whom the Software is furnished to do so, subject to
 12   the following conditions:
 13
 14   The above copyright notice and this permission notice shall be included
 15   in all copies or substantial portions of the Software.
 16
 17   THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
 18   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 19   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 20   NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 21   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 22   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 23   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 24   DEALINGS IN THE SOFTWARE.
 25   ----------------------------------------------------------------------- */
 26
 27#ifndef __x86_64__
 28
 29#define LIBFFI_ASM	
 30#include <fficonfig.h>
 31#include <ffi.h>
 32
 33.text
 34
 35.globl ffi_prep_args
 36
 37	.align 4
 38.globl ffi_call_SYSV
 39        .type    ffi_call_SYSV,@function
 40
 41ffi_call_SYSV:
 42.LFB1:
 43        pushl %ebp
 44.LCFI0:
 45        movl  %esp,%ebp
 46.LCFI1:
 47	/* Make room for all of the new args.  */
 48	movl  16(%ebp),%ecx
 49	subl  %ecx,%esp
 50
 51        /* Align the stack pointer to 16-bytes */
 52        andl  $0xfffffff0, %esp
 53
 54	movl  %esp,%eax
 55
 56	/* Place all of the ffi_prep_args in position  */
 57	pushl 12(%ebp)
 58	pushl %eax
 59	call  *8(%ebp)
 60
 61	/* Return stack to previous state and call the function  */
 62	addl  $8,%esp	
 63
 64	call  *28(%ebp)
 65
 66	/* Load %ecx with the return type code  */
 67	movl  20(%ebp),%ecx	
 68
 69	/* Protect %esi.  We're going to pop it in the epilogue.  */
 70	pushl %esi
 71
 72	/* If the return value pointer is NULL, assume no return value.  */
 73	cmpl  $0,24(%ebp)
 74	jne  0f
 75
 76	/* Even if there is no space for the return value, we are 
 77	   obliged to handle floating-point values.  */
 78	cmpl  $FFI_TYPE_FLOAT,%ecx
 79	jne   noretval
 80	fstp  %st(0)
 81
 82        jmp   epilogue
 83
 840:
 85	call  1f
 86
 87.Lstore_table:
 88	.long	noretval-.Lstore_table	/* FFI_TYPE_VOID */
 89	.long	retint-.Lstore_table	/* FFI_TYPE_INT */
 90	.long	retfloat-.Lstore_table	/* FFI_TYPE_FLOAT */
 91	.long	retdouble-.Lstore_table	/* FFI_TYPE_DOUBLE */
 92	.long	retlongdouble-.Lstore_table	/* FFI_TYPE_LONGDOUBLE */
 93	.long	retuint8-.Lstore_table	/* FFI_TYPE_UINT8 */
 94	.long	retsint8-.Lstore_table	/* FFI_TYPE_SINT8 */
 95	.long	retuint16-.Lstore_table	/* FFI_TYPE_UINT16 */
 96	.long	retsint16-.Lstore_table	/* FFI_TYPE_SINT16 */
 97	.long	retint-.Lstore_table	/* FFI_TYPE_UINT32 */
 98	.long	retint-.Lstore_table	/* FFI_TYPE_SINT32 */
 99	.long	retint64-.Lstore_table	/* FFI_TYPE_UINT64 */
100	.long	retint64-.Lstore_table	/* FFI_TYPE_SINT64 */
101	.long	retstruct-.Lstore_table	/* FFI_TYPE_STRUCT */
102	.long	retint-.Lstore_table	/* FFI_TYPE_POINTER */
103
1041:
105	pop  %esi
106	add  (%esi, %ecx, 4), %esi
107	jmp  *%esi
108
109	/* Sign/zero extend as appropriate.  */
110retsint8:
111	movsbl  %al, %eax
112	jmp  retint
113
114retsint16:
115	movswl  %ax, %eax
116	jmp  retint
117
118retuint8:
119	movzbl  %al, %eax
120	jmp  retint
121
122retuint16:
123	movzwl  %ax, %eax
124	jmp  retint
125
126retfloat:
127	/* Load %ecx with the pointer to storage for the return value  */
128	movl  24(%ebp),%ecx	
129	fstps (%ecx)
130	jmp   epilogue
131
132retdouble:
133	/* Load %ecx with the pointer to storage for the return value  */
134	movl  24(%ebp),%ecx	
135	fstpl (%ecx)
136	jmp   epilogue
137
138retlongdouble:
139	/* Load %ecx with the pointer to storage for the return value  */
140	movl  24(%ebp),%ecx	
141	fstpt (%ecx)
142	jmp   epilogue
143	
144retint64:	
145	/* Load %ecx with the pointer to storage for the return value  */
146	movl  24(%ebp),%ecx	
147	movl  %eax,0(%ecx)
148	movl  %edx,4(%ecx)
149	jmp   epilogue
150	
151retint:
152	/* Load %ecx with the pointer to storage for the return value  */
153	movl  24(%ebp),%ecx	
154	movl  %eax,0(%ecx)
155
156retstruct:
157	/* Nothing to do!  */
158
159noretval:
160epilogue:
161        popl %esi
162        movl %ebp,%esp
163        popl %ebp
164        ret
165.LFE1:
166.ffi_call_SYSV_end:
167        .size    ffi_call_SYSV,.ffi_call_SYSV_end-ffi_call_SYSV
168
169	.align	4
170FFI_HIDDEN (ffi_closure_SYSV)
171.globl ffi_closure_SYSV
172	.type	ffi_closure_SYSV, @function
173
174ffi_closure_SYSV:
175.LFB2:
176	pushl	%ebp
177.LCFI2:
178	movl	%esp, %ebp
179.LCFI3:
180	subl	$40, %esp
181	leal	-24(%ebp), %edx
182	movl	%edx, -12(%ebp)	/* resp */
183	leal	8(%ebp), %edx
184	movl	%edx, 4(%esp)	/* args = __builtin_dwarf_cfa () */
185	leal	-12(%ebp), %edx
186	movl	%edx, (%esp)	/* &resp */
187#if defined HAVE_HIDDEN_VISIBILITY_ATTRIBUTE || !defined __PIC__
188	call	ffi_closure_SYSV_inner
189#else
190	movl	%ebx, 8(%esp)
191.LCFI7:
192	call	1f
1931:	popl	%ebx
194	addl	$_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
195	call	ffi_closure_SYSV_inner@PLT
196	movl	8(%esp), %ebx
197#endif
198	movl	-12(%ebp), %ecx
199	cmpl	$FFI_TYPE_INT, %eax
200	je	.Lcls_retint
201
202	/* Handle FFI_TYPE_UINT8, FFI_TYPE_SINT8, FFI_TYPE_UINT16,
203	   FFI_TYPE_SINT16, FFI_TYPE_UINT32, FFI_TYPE_SINT32.  */
204	cmpl	$FFI_TYPE_UINT64, %eax
205	jge	0f
206	cmpl	$FFI_TYPE_UINT8, %eax
207	jge	.Lcls_retint
208	
2090:	cmpl	$FFI_TYPE_FLOAT, %eax
210	je	.Lcls_retfloat
211	cmpl	$FFI_TYPE_DOUBLE, %eax
212	je	.Lcls_retdouble
213	cmpl	$FFI_TYPE_LONGDOUBLE, %eax
214	je	.Lcls_retldouble
215	cmpl	$FFI_TYPE_SINT64, %eax
216	je	.Lcls_retllong
217	cmpl	$FFI_TYPE_STRUCT, %eax
218	je	.Lcls_retstruct
219.Lcls_epilogue:
220	movl	%ebp, %esp
221	popl	%ebp
222	ret
223.Lcls_retint:
224	movl	(%ecx), %eax
225	jmp	.Lcls_epilogue
226.Lcls_retfloat:
227	flds	(%ecx)
228	jmp	.Lcls_epilogue
229.Lcls_retdouble:
230	fldl	(%ecx)
231	jmp	.Lcls_epilogue
232.Lcls_retldouble:
233	fldt	(%ecx)
234	jmp	.Lcls_epilogue
235.Lcls_retllong:
236	movl	(%ecx), %eax
237	movl	4(%ecx), %edx
238	jmp	.Lcls_epilogue
239.Lcls_retstruct:
240	movl	%ebp, %esp
241	popl	%ebp
242	ret	$4
243.LFE2:
244	.size	ffi_closure_SYSV, .-ffi_closure_SYSV
245
246#if !FFI_NO_RAW_API
247
248/* Precalculate for e.g. the Solaris 10/x86 assembler.  */
249#if FFI_TRAMPOLINE_SIZE == 10
250#define RAW_CLOSURE_CIF_OFFSET 12
251#define RAW_CLOSURE_FUN_OFFSET 16
252#define RAW_CLOSURE_USER_DATA_OFFSET 20
253#elif FFI_TRAMPOLINE_SIZE == 24
254#define RAW_CLOSURE_CIF_OFFSET 24
255#define RAW_CLOSURE_FUN_OFFSET 28
256#define RAW_CLOSURE_USER_DATA_OFFSET 32
257#else
258#define RAW_CLOSURE_CIF_OFFSET ((FFI_TRAMPOLINE_SIZE + 3) & ~3)
259#define RAW_CLOSURE_FUN_OFFSET (RAW_CLOSURE_CIF_OFFSET + 4)
260#define RAW_CLOSURE_USER_DATA_OFFSET (RAW_CLOSURE_FUN_OFFSET + 4)
261#endif
262#define CIF_FLAGS_OFFSET 20
263
264	.align	4
265FFI_HIDDEN (ffi_closure_raw_SYSV)
266.globl ffi_closure_raw_SYSV
267	.type	ffi_closure_raw_SYSV, @function
268
269ffi_closure_raw_SYSV:
270.LFB3:
271	pushl	%ebp
272.LCFI4:
273	movl	%esp, %ebp
274.LCFI5:
275	pushl	%esi
276.LCFI6:
277	subl	$36, %esp
278	movl	RAW_CLOSURE_CIF_OFFSET(%eax), %esi	 /* closure->cif */
279	movl	RAW_CLOSURE_USER_DATA_OFFSET(%eax), %edx /* closure->user_data */
280	movl	%edx, 12(%esp)	/* user_data */
281	leal	8(%ebp), %edx	/* __builtin_dwarf_cfa () */
282	movl	%edx, 8(%esp)	/* raw_args */
283	leal	-24(%ebp), %edx
284	movl	%edx, 4(%esp)	/* &res */
285	movl	%esi, (%esp)	/* cif */
286	call	*RAW_CLOSURE_FUN_OFFSET(%eax)		 /* closure->fun */
287	movl	CIF_FLAGS_OFFSET(%esi), %eax		 /* rtype */
288	cmpl	$FFI_TYPE_INT, %eax
289	je	.Lrcls_retint
290
291	/* Handle FFI_TYPE_UINT8, FFI_TYPE_SINT8, FFI_TYPE_UINT16,
292	   FFI_TYPE_SINT16, FFI_TYPE_UINT32, FFI_TYPE_SINT32.  */
293	cmpl	$FFI_TYPE_UINT64, %eax
294	jge	0f
295	cmpl	$FFI_TYPE_UINT8, %eax
296	jge	.Lrcls_retint
2970:
298	cmpl	$FFI_TYPE_FLOAT, %eax
299	je	.Lrcls_retfloat
300	cmpl	$FFI_TYPE_DOUBLE, %eax
301	je	.Lrcls_retdouble
302	cmpl	$FFI_TYPE_LONGDOUBLE, %eax
303	je	.Lrcls_retldouble
304	cmpl	$FFI_TYPE_SINT64, %eax
305	je	.Lrcls_retllong
306.Lrcls_epilogue:
307	addl	$36, %esp
308	popl	%esi
309	popl	%ebp
310	ret
311.Lrcls_retint:
312	movl	-24(%ebp), %eax
313	jmp	.Lrcls_epilogue
314.Lrcls_retfloat:
315	flds	-24(%ebp)
316	jmp	.Lrcls_epilogue
317.Lrcls_retdouble:
318	fldl	-24(%ebp)
319	jmp	.Lrcls_epilogue
320.Lrcls_retldouble:
321	fldt	-24(%ebp)
322	jmp	.Lrcls_epilogue
323.Lrcls_retllong:
324	movl	-24(%ebp), %eax
325	movl	-20(%ebp), %edx
326	jmp	.Lrcls_epilogue
327.LFE3:
328	.size	ffi_closure_raw_SYSV, .-ffi_closure_raw_SYSV
329#endif
330
331	.section	.eh_frame,EH_FRAME_FLAGS,@progbits
332.Lframe1:
333	.long	.LECIE1-.LSCIE1	/* Length of Common Information Entry */
334.LSCIE1:
335	.long	0x0	/* CIE Identifier Tag */
336	.byte	0x1	/* CIE Version */
337#ifdef HAVE_AS_ASCII_PSEUDO_OP
338#ifdef __PIC__
339	.ascii "zR\0"	/* CIE Augmentation */
340#else
341	.ascii "\0"	/* CIE Augmentation */
342#endif
343#elif defined HAVE_AS_STRING_PSEUDO_OP
344#ifdef __PIC__
345	.string "zR"	/* CIE Augmentation */
346#else
347	.string ""	/* CIE Augmentation */
348#endif
349#else
350#error missing .ascii/.string
351#endif
352	.byte	0x1	/* .uleb128 0x1; CIE Code Alignment Factor */
353	.byte	0x7c	/* .sleb128 -4; CIE Data Alignment Factor */
354	.byte	0x8	/* CIE RA Column */
355#ifdef __PIC__
356	.byte	0x1	/* .uleb128 0x1; Augmentation size */
357	.byte	0x1b	/* FDE Encoding (pcrel sdata4) */
358#endif
359	.byte	0xc	/* DW_CFA_def_cfa */
360	.byte	0x4	/* .uleb128 0x4 */
361	.byte	0x4	/* .uleb128 0x4 */
362	.byte	0x88	/* DW_CFA_offset, column 0x8 */
363	.byte	0x1	/* .uleb128 0x1 */
364	.align 4
365.LECIE1:
366.LSFDE1:
367	.long	.LEFDE1-.LASFDE1	/* FDE Length */
368.LASFDE1:
369	.long	.LASFDE1-.Lframe1	/* FDE CIE offset */
370#if defined __PIC__ && defined HAVE_AS_X86_PCREL
371	.long	.LFB1-.	/* FDE initial location */
372#elif defined __PIC__
373	.long	.LFB1@rel
374#else
375	.long	.LFB1
376#endif
377	.long	.LFE1-.LFB1	/* FDE address range */
378#ifdef __PIC__
379	.byte	0x0	/* .uleb128 0x0; Augmentation size */
380#endif
381	.byte	0x4	/* DW_CFA_advance_loc4 */
382	.long	.LCFI0-.LFB1
383	.byte	0xe	/* DW_CFA_def_cfa_offset */
384	.byte	0x8	/* .uleb128 0x8 */
385	.byte	0x85	/* DW_CFA_offset, column 0x5 */
386	.byte	0x2	/* .uleb128 0x2 */
387	.byte	0x4	/* DW_CFA_advance_loc4 */
388	.long	.LCFI1-.LCFI0
389	.byte	0xd	/* DW_CFA_def_cfa_register */
390	.byte	0x5	/* .uleb128 0x5 */
391	.align 4
392.LEFDE1:
393.LSFDE2:
394	.long	.LEFDE2-.LASFDE2	/* FDE Length */
395.LASFDE2:
396	.long	.LASFDE2-.Lframe1	/* FDE CIE offset */
397#if defined __PIC__ && defined HAVE_AS_X86_PCREL
398	.long	.LFB2-.	/* FDE initial location */
399#elif defined __PIC__
400	.long	.LFB2@rel
401#else
402	.long	.LFB2
403#endif
404	.long	.LFE2-.LFB2	/* FDE address range */
405#ifdef __PIC__
406	.byte	0x0	/* .uleb128 0x0; Augmentation size */
407#endif
408	.byte	0x4	/* DW_CFA_advance_loc4 */
409	.long	.LCFI2-.LFB2
410	.byte	0xe	/* DW_CFA_def_cfa_offset */
411	.byte	0x8	/* .uleb128 0x8 */
412	.byte	0x85	/* DW_CFA_offset, column 0x5 */
413	.byte	0x2	/* .uleb128 0x2 */
414	.byte	0x4	/* DW_CFA_advance_loc4 */
415	.long	.LCFI3-.LCFI2
416	.byte	0xd	/* DW_CFA_def_cfa_register */
417	.byte	0x5	/* .uleb128 0x5 */
418#if !defined HAVE_HIDDEN_VISIBILITY_ATTRIBUTE && defined __PIC__
419	.byte	0x4	/* DW_CFA_advance_loc4 */
420	.long	.LCFI7-.LCFI3
421	.byte	0x83	/* DW_CFA_offset, column 0x3 */
422	.byte	0xa	/* .uleb128 0xa */
423#endif
424	.align 4
425.LEFDE2:
426
427#if !FFI_NO_RAW_API
428
429.LSFDE3:
430	.long	.LEFDE3-.LASFDE3	/* FDE Length */
431.LASFDE3:
432	.long	.LASFDE3-.Lframe1	/* FDE CIE offset */
433#if defined __PIC__ && defined HAVE_AS_X86_PCREL
434	.long	.LFB3-.	/* FDE initial location */
435#elif defined __PIC__
436	.long	.LFB3@rel
437#else
438	.long	.LFB3
439#endif
440	.long	.LFE3-.LFB3	/* FDE address range */
441#ifdef __PIC__
442	.byte	0x0	/* .uleb128 0x0; Augmentation size */
443#endif
444	.byte	0x4	/* DW_CFA_advance_loc4 */
445	.long	.LCFI4-.LFB3
446	.byte	0xe	/* DW_CFA_def_cfa_offset */
447	.byte	0x8	/* .uleb128 0x8 */
448	.byte	0x85	/* DW_CFA_offset, column 0x5 */
449	.byte	0x2	/* .uleb128 0x2 */
450	.byte	0x4	/* DW_CFA_advance_loc4 */
451	.long	.LCFI5-.LCFI4
452	.byte	0xd	/* DW_CFA_def_cfa_register */
453	.byte	0x5	/* .uleb128 0x5 */
454	.byte	0x4	/* DW_CFA_advance_loc4 */
455	.long	.LCFI6-.LCFI5
456	.byte	0x86	/* DW_CFA_offset, column 0x6 */
457	.byte	0x3	/* .uleb128 0x3 */
458	.align 4
459.LEFDE3:
460
461#endif
462
463#endif /* ifndef __x86_64__ */
464
465#if defined __ELF__ && defined __linux__
466	.section	.note.GNU-stack,"",@progbits
467#endif