1 | /* syscall - indirect system call. |
2 | Copyright (C) 2005-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <sysdep.h> |
20 | |
21 | /* We don't need a special syscall to implement syscall(). It won't work |
22 | reliably with 64-bit arguments (but that is true on many modern platforms). |
23 | */ |
24 | |
25 | ENTRY (syscall) |
26 | mov r2, r4 |
27 | mov r4, r5 |
28 | mov r5, r6 |
29 | mov r6, r7 |
30 | ldw r7, 0(sp) |
31 | ldw r8, 4(sp) |
32 | ldw r9, 8(sp) |
33 | trap |
34 | bne r7, zero, SYSCALL_ERROR_LABEL |
35 | ret |
36 | PSEUDO_END (syscall) |
37 | |