1/* Copyright (C) 1991-2022 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#include <errno.h>
20
21#if IS_IN (rtld)
22# include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */
23#endif
24
25#include <tls.h>
26
27#undef syscall_error
28__syscall_error:
29#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
30 /* We translate the system's EWOULDBLOCK error into EAGAIN.
31 The GNU C library always defines EWOULDBLOCK==EAGAIN.
32 EWOULDBLOCK_sys is the original number. */
33 cmp r0, $EWOULDBLOCK_sys /* Is it the old EWOULDBLOCK? */
34 it eq
35 moveq r0, $EAGAIN /* Yes; translate it to EAGAIN. */
36#endif
37
38#if !IS_IN (rtld)
39 mov r1, r0
40 GET_TLS (r2)
41 ldr r2, 1f
42#ifdef __thumb__
432: add r2, r2, pc
44 ldr r2, [r2]
45#else
462: ldr r2, [pc, r2]
47#endif
48 str r1, [r0, r2]
49 mvn r0, #0
50 DO_RET(lr)
51
521: .word errno(gottpoff) + (. - 2b - PC_OFS)
53#elif RTLD_PRIVATE_ERRNO
54 LDST_PCREL(str, r0, r1, C_SYMBOL_NAME(rtld_errno))
55 mvn r0, #0
56 DO_RET(r14)
57#else
58#error "Unsupported non-TLS case"
59#endif
60
61#undef __syscall_error
62END (__syscall_error)
63

source code of glibc/sysdeps/unix/arm/sysdep.S