about summary refs log tree commit diff
path: root/sysdeps/unix/sysv/linux/nios2/sysdep.S
blob: ecb6f270d40448fb3bfaceb85169d687e514c856 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
/* Static library error handling code fragment for Nios II.
   Copyright (C) 2015-2023 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <sysdep.h>

/* The following code is only used in the static library. In the shared
   library, the error handling code is at the end of each function.  */

#ifndef	PIC

/* In the static library, the syscall stubs jump here when they detect
   an error.  */

# undef CALL_MCOUNT
# define CALL_MCOUNT /* Don't insert the profiling call, it clobbers r2.  */

# if IS_IN (libc)
#  define SYSCALL_ERROR_ERRNO __libc_errno
# else
#  define SYSCALL_ERROR_ERRNO errno
# endif
	.text
ENTRY (__syscall_error)
	nextpc	r3
1:
	movhi	r8, %hiadj(_gp_got - 1b)
	addi	r8, r8, %lo(_gp_got - 1b)
	add	r3, r3, r8
	ldw	r3, %tls_ie(SYSCALL_ERROR_ERRNO)(r3)
	add	r3, r23, r3
	stw	r2, 0(r3)
	movi	r2, -1
	ret
END (__syscall_error)
#endif