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
51
|
/* syscall error handlers
Copyright (C) 2011-2022 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>
#if IS_IN (libc)
# define errno __libc_errno
#endif
ENTRY (__syscall_error)
mv t0, ra
/* Fall through to __syscall_set_errno. */
END (__syscall_error)
/* Non-standard calling convention: argument in a0, return address in t0,
and clobber only t1. */
ENTRY (__syscall_set_errno)
/* We got here because a0 < 0, but only codes in the range [-4095, -1]
represent errors. Otherwise, just return the result normally. */
li t1, -4096
bleu a0, t1, 1f
neg a0, a0
#if RTLD_PRIVATE_ERRNO
sw a0, rtld_errno, t1
#elif defined(__PIC__)
la.tls.ie t1, errno
add t1, t1, tp
sw a0, 0(t1)
#else
lui t1, %tprel_hi(errno)
add t1, t1, tp, %tprel_add(errno)
sw a0, %tprel_lo(errno)(t1)
#endif
li a0, -1
1: jr t0
END (__syscall_set_errno)
|
