1/* syscall error handlers.  C-SKY ABIV2 version.
2   Copyright (C) 2018-2021 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
5   The GNU C Library is free software; you can redistribute it and/or
6   modify it under the terms of the GNU Lesser General Public
7   License as published by the Free Software Foundation; either
8   version 2.1 of the License, or (at your option) any later version.
9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library.  If not, see
17   <https://www.gnu.org/licenses/>.  */
18
19#include <sysdep.h>
20
21/* The syscall stubs jump here when they detect an error.
22   The code for Linux is almost identical to the canonical Unix
23   code, except that the error number in R0 is negated.  */
24
25#undef CALL_MCOUNT
26#define CALL_MCOUNT /* Don't insert the profiling call, it clobbers R0.  */
27
28	.text
29ENTRY (__syscall_error)
30	movi	a1, 0
31	rsub	a0, a0, a1
32
33#if !IS_IN (rtld)
34	mov	a1, a0
35	mov	a0, tls
36
37	grs	t1, .Lgetpc1
38.Lgetpc1:
39	lrw	t0, errno@gottpoff
40	add	t1, t1, t0
41	ldw	t1, (t1)
42	add	t1, a0
43	stw	a1, (t1)
44	bmaski	a0, 0
45	rts
46#elif RTLD_PRIVATE_ERRNO /* !IS_IN (rtld) */
47# ifdef  __PIC__
48	grs	t1, .Lgetpc2
49.Lgetpc2:
50	lrw	t0, .Lgetpc2@GOTPC
51	addu	t1, t1, t0
52	lrw	t0, rtld_errno@PLT
53	ldr.w	t0, (t1, t0 << 0)
54# else
55	lrw	t0, rtld_errno
56# endif /* __PIC__ */
57	stw	a0, (t0)
58	bmaski	a0, 0
59	rts
60#else
61# error "Unsupported non-TLS case"
62#endif /* RTLD_PRIVATE_ERRNO */
63
64#undef __syscall_error
65END (__syscall_error)
66