1/* Static library error handling code fragment for Nios II.
2   Copyright (C) 2015-2022 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 License as
7   published by the Free Software Foundation; either version 2.1 of the
8   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 following code is only used in the static library. In the shared
22   library, the error handling code is at the end of each function.  */
23
24#ifndef	PIC
25
26/* In the static library, the syscall stubs jump here when they detect
27   an error.  */
28
29# undef CALL_MCOUNT
30# define CALL_MCOUNT /* Don't insert the profiling call, it clobbers r2.  */
31
32# if IS_IN (libc)
33#  define SYSCALL_ERROR_ERRNO __libc_errno
34# else
35#  define SYSCALL_ERROR_ERRNO errno
36# endif
37	.text
38ENTRY (__syscall_error)
39	nextpc	r3
401:
41	movhi	r8, %hiadj(_gp_got - 1b)
42	addi	r8, r8, %lo(_gp_got - 1b)
43	add	r3, r3, r8
44	ldw	r3, %tls_ie(SYSCALL_ERROR_ERRNO)(r3)
45	add	r3, r23, r3
46	stw	r2, 0(r3)
47	movi	r2, -1
48	ret
49END (__syscall_error)
50#endif
51