1/* -----------------------------------------------------------------------
2   eabi.S - Copyright (c) 2012, 2013  Anthony Green
3
4   Moxie Assembly glue.
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, EXPRESS
18   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20   IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
21   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23   OTHER DEALINGS IN THE SOFTWARE.
24   ----------------------------------------------------------------------- */
25
26#define LIBFFI_ASM
27#include <fficonfig.h>
28#include <ffi.h>
29
30	.globl ffi_prep_args_EABI
31
32	.text
33	.p2align 4
34	.globl ffi_call_EABI
35	.type ffi_call_EABI, @function
36
37	# $r0 :   ffi_prep_args
38	# $r1 :   &ecif
39	# $r2 :   cif->bytes
40	# $r3 :   fig->flags
41	# $r4 :   ecif.rvalue
42	# $r5 :   fn
43
44ffi_call_EABI:
45	push	$sp, $r6
46	push	$sp, $r7
47	push	$sp, $r8
48	dec	$sp, 24
49
50	/* Store incoming args on stack.  */
51	sto.l	0($sp), $r0 /* ffi_prep_args */
52	sto.l	4($sp), $r1 /* ecif */
53	sto.l	8($sp), $r2 /* bytes */
54	sto.l	12($sp), $r3 /* flags */
55	sto.l	16($sp), $r4 /* &rvalue */
56	sto.l	20($sp), $r5 /* fn */
57
58	/* Call ffi_prep_args.  */
59	mov 	$r6, $r4 /* Save result buffer */
60	mov	$r7, $r5 /* Save the target fn */
61	mov	$r8, $r3 /* Save the flags */
62	sub	$sp, $r2 /* Allocate stack space */
63	mov	$r0, $sp /* We can stomp over $r0 */
64	/* $r1 is already set up */
65	jsra 	ffi_prep_args
66
67	/* Load register arguments.  */
68	ldo.l	$r0, 0($sp)
69	ldo.l	$r1, 4($sp)
70	ldo.l	$r2, 8($sp)
71	ldo.l	$r3, 12($sp)
72	ldo.l	$r4, 16($sp)
73	ldo.l	$r5, 20($sp)
74
75	/* Call the target function.  */
76	jsr	$r7
77
78	ldi.l	$r7, 0xffffffff
79	cmp	$r8, $r7
80	beq	retstruct
81
82	ldi.l	$r7, 4
83	cmp	$r8, $r7
84	bgt	ret2reg
85
86	st.l	($r6), $r0
87	jmpa	retdone
88
89ret2reg:
90	st.l	($r6), $r0
91	sto.l	4($r6), $r1
92
93retstruct:
94retdone:
95	/* Return.  */
96	ldo.l	$r6, -4($fp)
97	ldo.l	$r7, -8($fp)
98	ldo.l	$r8, -12($fp)
99	ret
100	.size ffi_call_EABI, .-ffi_call_EABI
101
102