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__ |
43 | 2: add r2, r2, pc |
44 | ldr r2, [r2] |
45 | #else |
46 | 2: ldr r2, [pc, r2] |
47 | #endif |
48 | str r1, [r0, r2] |
49 | mvn r0, #0 |
50 | DO_RET(lr) |
51 | |
52 | 1: .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 |
62 | END (__syscall_error) |
63 | |