1/* Copyright (C) 2005-2022 Free Software Foundation, Inc.
2   This file is part of the GNU C Library.
3
4   The GNU C Library is free software; you can redistribute it and/or
5   modify it under the terms of the GNU Lesser General Public
6   License as published by the Free Software Foundation; either
7   version 2.1 of the License, or (at your option) any later version.
8
9   The GNU C Library is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with the GNU C Library.  If not, see
16   <https://www.gnu.org/licenses/>.  */
17
18#include <sysdep.h>
19
20/* In the EABI syscall interface, we don't need a special syscall to
21   implement syscall().  It won't work reliably with 64-bit arguments
22   (but that is true on many modern platforms).  */
23
24ENTRY (syscall)
25	mov	ip, sp
26	push	{r4, r5, r6, r7}
27	cfi_adjust_cfa_offset (16)
28	cfi_rel_offset (r4, 0)
29	cfi_rel_offset (r5, 4)
30	cfi_rel_offset (r6, 8)
31	cfi_rel_offset (r7, 12)
32	mov	r7, r0
33	mov	r0, r1
34	mov	r1, r2
35	mov	r2, r3
36	ldmfd	ip, {r3, r4, r5, r6}
37	swi	0x0
38	pop	{r4, r5, r6, r7}
39	cfi_adjust_cfa_offset (-16)
40	cfi_restore (r4)
41	cfi_restore (r5)
42	cfi_restore (r6)
43	cfi_restore (r7)
44	cmn	r0, #4096
45	it	cc
46	RETINSTR(cc, lr)
47	b	PLTJMP(syscall_error)
48PSEUDO_END (syscall)
49