1#ifdef __ppc__
2/* -----------------------------------------------------------------------
3   darwin_closure.S - Copyright (c) 2002, 2003, 2004, Free Software Foundation,
4   Inc. based on ppc_closure.S
5
6   PowerPC Assembly glue.
7
8   Permission is hereby granted, free of charge, to any person obtaining
9   a copy of this software and associated documentation files (the
10   ``Software''), to deal in the Software without restriction, including
11   without limitation the rights to use, copy, modify, merge, publish,
12   distribute, sublicense, and/or sell copies of the Software, and to
13   permit persons to whom the Software is furnished to do so, subject to
14   the following conditions:
15
16   The above copyright notice and this permission notice shall be included
17   in all copies or substantial portions of the Software.
18
19   THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
20   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
22   IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
23   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25   OTHER DEALINGS IN THE SOFTWARE.
26   ----------------------------------------------------------------------- */
27
28#define LIBFFI_ASM
29#define L(x) x
30
31#if defined(__ppc64__)
32#define MODE_CHOICE(x, y) y
33#else
34#define MODE_CHOICE(x, y) x
35#endif
36
37#define lgu     MODE_CHOICE(lwzu, ldu)
38
39#define g_long  MODE_CHOICE(long, quad)         /* usage is ".g_long" */
40
41#define LOG2_GPR_BYTES  MODE_CHOICE(2,3)        /* log2(GPR_BYTES) */
42
43	.file	"darwin_closure.S"
44.text
45	.align LOG2_GPR_BYTES
46.globl _ffi_closure_ASM
47
48.text
49	.align LOG2_GPR_BYTES
50_ffi_closure_ASM:
51LFB1:
52	mflr	r0		/* extract return address  */
53	stw	r0,8(r1)	/* save the return address  */
54LCFI0:
55	/* 24 Bytes (Linkage Area)
56	   32 Bytes (outgoing parameter area, always reserved)
57	   104 Bytes (13*8 from FPR)
58	   16 Bytes (result)
59	   176 Bytes  */
60
61	stwu	r1,-176(r1)	/* skip over caller save area
62				keep stack aligned to 16.  */
63LCFI1:
64	/* We want to build up an area for the parameters passed
65	   in registers. (both floating point and integer)  */
66
67	/* We store gpr 3 to gpr 10 (aligned to 4)
68	   in the parents outgoing area.  */
69	stw   r3,200(r1)
70	stw   r4,204(r1)
71	stw   r5,208(r1)
72	stw   r6,212(r1)
73	stw   r7,216(r1)
74	stw   r8,220(r1)
75	stw   r9,224(r1)
76	stw   r10,228(r1)
77
78	/* We save fpr 1 to fpr 13. (aligned to 8)  */
79	stfd  f1,56(r1)
80	stfd  f2,64(r1)
81	stfd  f3,72(r1)
82	stfd  f4,80(r1)
83	stfd  f5,88(r1)
84	stfd  f6,96(r1)
85	stfd  f7,104(r1)
86	stfd  f8,112(r1)
87	stfd  f9,120(r1)
88	stfd  f10,128(r1)
89	stfd  f11,136(r1)
90	stfd  f12,144(r1)
91	stfd  f13,152(r1)
92
93	/* Set up registers for the routine that actually does the work
94	   get the context pointer from the trampoline.  */
95	mr r3,r11
96
97	/* Now load up the pointer to the result storage.  */
98	addi r4,r1,160
99
100	/* Now load up the pointer to the saved gpr registers.  */
101	addi r5,r1,200
102
103	/* Now load up the pointer to the saved fpr registers.  */
104	addi r6,r1,56
105
106	/* Make the call.  */
107	bl	Lffi_closure_helper_DARWIN$stub
108
109	/* Now r3 contains the return type
110	   so use it to look up in a table
111	   so we know how to deal with each type.  */
112
113	/* Look up the proper starting point in table
114	   by using return type as offset.  */
115	addi  r5,r1,160		  /* Get pointer to results area.  */
116	bl    Lget_ret_type0_addr /* Get pointer to Lret_type0 into LR.  */
117	mflr  r4		  /* Move to r4.  */
118	slwi  r3,r3,4		  /* Now multiply return type by 16.  */
119	add   r3,r3,r4		  /* Add contents of table to table address.  */
120	mtctr r3
121	bctr			  /* Jump to it.  */
122LFE1:
123/* Each of the ret_typeX code fragments has to be exactly 16 bytes long
124   (4 instructions). For cache effectiveness we align to a 16 byte boundary
125   first.  */
126
127	.align 4
128
129	nop
130	nop
131	nop
132Lget_ret_type0_addr:
133	blrl
134
135/* case FFI_TYPE_VOID  */
136Lret_type0:
137	b	Lfinish
138	nop
139	nop
140	nop
141
142/* case FFI_TYPE_INT  */
143Lret_type1:
144	lwz	r3,0(r5)
145	b	Lfinish
146	nop
147	nop
148
149/* case FFI_TYPE_FLOAT  */
150Lret_type2:
151	lfs	f1,0(r5)
152	b	Lfinish
153	nop
154	nop
155
156/* case FFI_TYPE_DOUBLE  */
157Lret_type3:
158	lfd	f1,0(r5)
159	b	Lfinish
160	nop
161	nop
162
163/* case FFI_TYPE_LONGDOUBLE  */
164Lret_type4:
165	lfd	f1,0(r5)
166	lfd	f2,8(r5)
167	b	Lfinish
168	nop
169
170/* case FFI_TYPE_UINT8  */
171Lret_type5:
172	lbz	r3,3(r5)
173	b	Lfinish
174	nop
175	nop
176
177/* case FFI_TYPE_SINT8  */
178Lret_type6:
179	lbz	r3,3(r5)
180	extsb	r3,r3
181	b	Lfinish
182	nop
183
184/* case FFI_TYPE_UINT16  */
185Lret_type7:
186	lhz	r3,2(r5)
187	b	Lfinish
188	nop
189	nop
190
191/* case FFI_TYPE_SINT16  */
192Lret_type8:
193	lha	r3,2(r5)
194	b	Lfinish
195	nop
196	nop
197
198/* case FFI_TYPE_UINT32  */
199Lret_type9:
200	lwz	r3,0(r5)
201	b	Lfinish
202	nop
203	nop
204
205/* case FFI_TYPE_SINT32  */
206Lret_type10:
207	lwz	r3,0(r5)
208	b	Lfinish
209	nop
210	nop
211
212/* case FFI_TYPE_UINT64  */
213Lret_type11:
214	lwz	r3,0(r5)
215	lwz	r4,4(r5)
216	b	Lfinish
217	nop
218
219/* case FFI_TYPE_SINT64  */
220Lret_type12:
221	lwz	r3,0(r5)
222	lwz	r4,4(r5)
223	b	Lfinish
224	nop
225
226/* case FFI_TYPE_STRUCT  */
227Lret_type13:
228	b	Lfinish
229	nop
230	nop
231	nop
232
233/* case FFI_TYPE_POINTER  */
234Lret_type14:
235	lwz	r3,0(r5)
236	b	Lfinish
237	nop
238	nop
239
240/* case done  */
241Lfinish:
242	addi	r1,r1,176	/* Restore stack pointer.  */
243	lwz	r0,8(r1)	/* Get return address.  */
244	mtlr	r0		/* Reset link register.  */
245	blr
246
247/* END(ffi_closure_ASM)  */
248
249.data
250.section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms
251EH_frame1:
252	.set	L$set$0,LECIE1-LSCIE1
253	.long	L$set$0	; Length of Common Information Entry
254LSCIE1:
255	.long	0x0	; CIE Identifier Tag
256	.byte	0x1	; CIE Version
257	.ascii	"zR\0"	; CIE Augmentation
258	.byte	0x1	; uleb128 0x1; CIE Code Alignment Factor
259	.byte	0x7c	; sleb128 -4; CIE Data Alignment Factor
260	.byte	0x41	; CIE RA Column
261	.byte	0x1	; uleb128 0x1; Augmentation size
262	.byte	0x90	; FDE Encoding (indirect pcrel)
263	.byte	0xc	; DW_CFA_def_cfa
264	.byte	0x1	; uleb128 0x1
265	.byte	0x0	; uleb128 0x0
266	.align	LOG2_GPR_BYTES
267LECIE1:
268.globl _ffi_closure_ASM.eh
269_ffi_closure_ASM.eh:
270LSFDE1:
271	.set	L$set$1,LEFDE1-LASFDE1
272	.long	L$set$1	; FDE Length
273
274LASFDE1:
275	.long	LASFDE1-EH_frame1	; FDE CIE offset
276	.g_long	LLFB1$non_lazy_ptr-.	; FDE initial location
277	.set	L$set$3,LFE1-LFB1
278	.g_long	L$set$3	; FDE address range
279	.byte   0x0     ; uleb128 0x0; Augmentation size
280	.byte	0x4	; DW_CFA_advance_loc4
281	.set	L$set$3,LCFI1-LCFI0
282	.long	L$set$3
283	.byte	0xe	; DW_CFA_def_cfa_offset
284	.byte	176,1	; uleb128 176
285	.byte	0x4	; DW_CFA_advance_loc4
286	.set	L$set$4,LCFI0-LFB1
287	.long	L$set$4
288	.byte   0x11    ; DW_CFA_offset_extended_sf
289	.byte	0x41	; uleb128 0x41
290	.byte   0x7e    ; sleb128 -2
291	.align	LOG2_GPR_BYTES
292LEFDE1:
293.data
294	.align	LOG2_GPR_BYTES
295LDFCM0:
296.section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32
297	.align	LOG2_GPR_BYTES
298Lffi_closure_helper_DARWIN$stub:
299#if 1
300	.indirect_symbol _ffi_closure_helper_DARWIN
301	mflr	r0
302	bcl	20,31,LO$ffi_closure_helper_DARWIN
303LO$ffi_closure_helper_DARWIN:
304	mflr	r11
305	addis	r11,r11,ha16(L_ffi_closure_helper_DARWIN$lazy_ptr - LO$ffi_closure_helper_DARWIN)
306	mtlr	r0
307	lgu	r12,lo16(L_ffi_closure_helper_DARWIN$lazy_ptr - LO$ffi_closure_helper_DARWIN)(r11)
308	mtctr	r12
309	bctr
310.lazy_symbol_pointer
311L_ffi_closure_helper_DARWIN$lazy_ptr:
312	.indirect_symbol _ffi_closure_helper_DARWIN
313	.g_long dyld_stub_binding_helper
314#endif
315.data
316	.align LOG2_GPR_BYTES
317LLFB1$non_lazy_ptr:
318	.g_long LFB1
319
320#endif /* __ppc__ */
321