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5f72b005 | 1 | /* System call interface. C-SKY ABIV2 version. |
581c785b | 2 | Copyright (C) 2018-2022 Free Software Foundation, Inc. |
5f72b005 MH |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
5f72b005 MH |
18 | |
19 | #include <sysdep.h> | |
20 | ||
21 | /* long syscall(long sysnum, long a, long b, long c, long d, long e, long f) */ | |
22 | ||
23 | ENTRY (syscall) | |
24 | subi sp, 8 | |
25 | stw r4, (sp, 0) | |
26 | stw r5, (sp, 4) | |
27 | mov t0, r7 | |
28 | ||
29 | /* Put system call number in r7, adjust shift for arguments | |
30 | and load extra arguments from stack. */ | |
31 | mov r7, a0 | |
32 | mov a0, a1 | |
33 | mov a1, a2 | |
34 | mov a2, a3 | |
35 | ldw a3, (sp, 8) | |
36 | ldw r4, (sp, 12) | |
37 | ldw r5, (sp, 16) | |
38 | trap 0 | |
39 | ||
40 | /* Restore temp registers. */ | |
41 | mov r7, t0 | |
42 | ldw r4, (sp, 0) | |
43 | ldw r5, (sp, 4) | |
44 | addi sp, 8 | |
45 | ||
46 | /* Check return value. */ | |
47 | lrw t0, 0xfffff000 | |
48 | cmphs a0, t0 | |
49 | bf 1f | |
50 | #ifdef __PIC__ | |
51 | subi sp, 8 | |
52 | stw gb, (sp, 0) | |
53 | stw lr, (sp, 4) | |
54 | grs gb, .Lgetpc | |
55 | .Lgetpc: | |
56 | lrw t0, .Lgetpc@GOTPC | |
57 | addu gb, gb, t0 | |
58 | lrw t0, __syscall_error@PLT | |
59 | ldr.w t0, (gb, t0 << 0) | |
60 | jsr t0 | |
61 | ldw gb, (sp, 0) | |
62 | ldw lr, (sp, 4) | |
63 | addi sp, 8 | |
64 | #else | |
65 | jmpi __syscall_error | |
66 | #endif /* __PIC__ */ | |
67 | 1: | |
68 | rts | |
69 | PSEUDO_END (syscall) |