1 | /* Copyright (C) 2001-2022 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 | #include <tls.h> |
21 | |
22 | #if IS_IN (rtld) |
23 | # include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */ |
24 | #endif |
25 | |
26 | .globl C_SYMBOL_NAME(errno) |
27 | .globl syscall_error |
28 | |
29 | __syscall_error: |
30 | #if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN |
31 | /* We translate the system's EWOULDBLOCK error into EAGAIN. |
32 | The GNU C library always defines EWOULDBLOCK==EAGAIN. |
33 | EWOULDBLOCK_sys is the original number. */ |
34 | cmp $EWOULDBLOCK_sys, %RAX_LP /* Is it the old EWOULDBLOCK? */ |
35 | jne notb /* Branch if not. */ |
36 | movl $EAGAIN, %eax /* Yes; translate it to EAGAIN. */ |
37 | notb: |
38 | #endif |
39 | #ifdef PIC |
40 | movq C_SYMBOL_NAME(errno@GOTTPOFF)(%rip), %rcx |
41 | movl %eax, %fs:0(%rcx) |
42 | #else |
43 | movl %eax, %fs:C_SYMBOL_NAME(errno@TPOFF) |
44 | #endif |
45 | or $-1, %RAX_LP |
46 | ret |
47 | |
48 | #undef __syscall_error |
49 | END (__syscall_error) |
50 | |