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/Modules/_ctypes/libffi/src/powerpc/linux64.S

http://unladen-swallow.googlecode.com/
Assembly | 187 lines | 168 code | 19 blank | 0 comment | 2 complexity | a7d09aad6ca2eb4358d7ad4bca4fdd7e MD5 | raw file
  1/* -----------------------------------------------------------------------
  2   sysv.h - Copyright (c) 2003 Jakub Jelinek <jakub@redhat.com>
  3	    Copyright (c) 2008 Red Hat, Inc.
  4
  5   PowerPC64 Assembly glue.
  6
  7   Permission is hereby granted, free of charge, to any person obtaining
  8   a copy of this software and associated documentation files (the
  9   ``Software''), to deal in the Software without restriction, including
 10   without limitation the rights to use, copy, modify, merge, publish,
 11   distribute, sublicense, and/or sell copies of the Software, and to
 12   permit persons to whom the Software is furnished to do so, subject to
 13   the following conditions:
 14
 15   The above copyright notice and this permission notice shall be included
 16   in all copies or substantial portions of the Software.
 17
 18   THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
 19   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 20   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 21   NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 22   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 23   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 24   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 25   DEALINGS IN THE SOFTWARE.
 26   ----------------------------------------------------------------------- */
 27
 28#define LIBFFI_ASM
 29#include <fficonfig.h>
 30#include <ffi.h>
 31
 32#ifdef __powerpc64__
 33	.hidden	ffi_call_LINUX64, .ffi_call_LINUX64
 34	.globl	ffi_call_LINUX64, .ffi_call_LINUX64
 35	.section	".opd","aw"
 36	.align	3
 37ffi_call_LINUX64:
 38	.quad	.ffi_call_LINUX64,.TOC.@tocbase,0
 39	.size	ffi_call_LINUX64,24
 40	.type	.ffi_call_LINUX64,@function
 41	.text
 42.ffi_call_LINUX64:
 43.LFB1:
 44	mflr	%r0
 45	std	%r28, -32(%r1)
 46	std	%r29, -24(%r1)
 47	std	%r30, -16(%r1)
 48	std	%r31, -8(%r1)
 49	std	%r0, 16(%r1)
 50
 51	mr	%r28, %r1	/* our AP.  */
 52.LCFI0:
 53	stdux	%r1, %r1, %r4
 54	mr	%r31, %r5	/* flags, */
 55	mr	%r30, %r6	/* rvalue, */
 56	mr	%r29, %r7	/* function address.  */
 57	std	%r2, 40(%r1)
 58
 59	/* Call ffi_prep_args64.  */
 60	mr	%r4, %r1
 61	bl	.ffi_prep_args64
 62
 63	ld	%r0, 0(%r29)
 64	ld	%r2, 8(%r29)
 65	ld	%r11, 16(%r29)
 66
 67	/* Now do the call.  */
 68	/* Set up cr1 with bits 4-7 of the flags.  */
 69	mtcrf	0x40, %r31
 70
 71	/* Get the address to call into CTR.  */
 72	mtctr	%r0
 73	/* Load all those argument registers.  */
 74	ld	%r3, -32-(8*8)(%r28)
 75	ld	%r4, -32-(7*8)(%r28)
 76	ld	%r5, -32-(6*8)(%r28)
 77	ld	%r6, -32-(5*8)(%r28)
 78	bf-	5, 1f
 79	ld	%r7, -32-(4*8)(%r28)
 80	ld	%r8, -32-(3*8)(%r28)
 81	ld	%r9, -32-(2*8)(%r28)
 82	ld	%r10, -32-(1*8)(%r28)
 831:
 84
 85	/* Load all the FP registers.  */
 86	bf-	6, 2f
 87	lfd	%f1, -32-(21*8)(%r28)
 88	lfd	%f2, -32-(20*8)(%r28)
 89	lfd	%f3, -32-(19*8)(%r28)
 90	lfd	%f4, -32-(18*8)(%r28)
 91	lfd	%f5, -32-(17*8)(%r28)
 92	lfd	%f6, -32-(16*8)(%r28)
 93	lfd	%f7, -32-(15*8)(%r28)
 94	lfd	%f8, -32-(14*8)(%r28)
 95	lfd	%f9, -32-(13*8)(%r28)
 96	lfd	%f10, -32-(12*8)(%r28)
 97	lfd	%f11, -32-(11*8)(%r28)
 98	lfd	%f12, -32-(10*8)(%r28)
 99	lfd	%f13, -32-(9*8)(%r28)
1002:
101
102	/* Make the call.  */
103	bctrl
104
105	/* This must follow the call immediately, the unwinder
106	   uses this to find out if r2 has been saved or not.  */
107	ld	%r2, 40(%r1)
108
109	/* Now, deal with the return value.  */
110	mtcrf	0x01, %r31
111	bt-	30, .Ldone_return_value
112	bt-	29, .Lfp_return_value
113	std	%r3, 0(%r30)
114	/* Fall through...  */
115
116.Ldone_return_value:
117	/* Restore the registers we used and return.  */
118	mr	%r1, %r28
119	ld	%r0, 16(%r28)
120	ld	%r28, -32(%r1)
121	mtlr	%r0
122	ld	%r29, -24(%r1)
123	ld	%r30, -16(%r1)
124	ld	%r31, -8(%r1)
125	blr
126
127.Lfp_return_value:
128	bf	28, .Lfloat_return_value
129	stfd	%f1, 0(%r30)
130	mtcrf	0x02, %r31 /* cr6  */
131	bf	27, .Ldone_return_value
132	stfd	%f2, 8(%r30)
133	b	.Ldone_return_value
134.Lfloat_return_value:
135	stfs	%f1, 0(%r30)
136	b	.Ldone_return_value
137.LFE1:
138	.long	0
139	.byte	0,12,0,1,128,4,0,0
140	.size	.ffi_call_LINUX64,.-.ffi_call_LINUX64
141
142	.section	.eh_frame,EH_FRAME_FLAGS,@progbits
143.Lframe1:
144	.4byte	.LECIE1-.LSCIE1	 # Length of Common Information Entry
145.LSCIE1:
146	.4byte	0x0	 # CIE Identifier Tag
147	.byte	0x1	 # CIE Version
148	.ascii "zR\0"	 # CIE Augmentation
149	.uleb128 0x1	 # CIE Code Alignment Factor
150	.sleb128 -8	 # CIE Data Alignment Factor
151	.byte	0x41	 # CIE RA Column
152	.uleb128 0x1	 # Augmentation size
153	.byte	0x14	 # FDE Encoding (pcrel udata8)
154	.byte	0xc	 # DW_CFA_def_cfa
155	.uleb128 0x1
156	.uleb128 0x0
157	.align 3
158.LECIE1:
159.LSFDE1:
160	.4byte	.LEFDE1-.LASFDE1	 # FDE Length
161.LASFDE1:
162	.4byte	.LASFDE1-.Lframe1	 # FDE CIE offset
163	.8byte	.LFB1-.	 # FDE initial location
164	.8byte	.LFE1-.LFB1	 # FDE address range
165	.uleb128 0x0	 # Augmentation size
166	.byte	0x2	 # DW_CFA_advance_loc1
167	.byte	.LCFI0-.LFB1
168	.byte	0xd	 # DW_CFA_def_cfa_register
169	.uleb128 0x1c
170	.byte	0x11	 # DW_CFA_offset_extended_sf
171	.uleb128 0x41
172	.sleb128 -2
173	.byte	0x9f	 # DW_CFA_offset, column 0x1f
174	.uleb128 0x1
175	.byte	0x9e	 # DW_CFA_offset, column 0x1e
176	.uleb128 0x2
177	.byte	0x9d	 # DW_CFA_offset, column 0x1d
178	.uleb128 0x3
179	.byte	0x9c	 # DW_CFA_offset, column 0x1c
180	.uleb128 0x4
181	.align 3
182.LEFDE1:
183#endif
184
185#if defined __ELF__ && defined __linux__
186	.section	.note.GNU-stack,"",@progbits
187#endif