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1 | /* Copyright (C) 2001, 2002, 2003, 2005 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, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. */ | |
18 | ||
19 | #include <sysdep.h> | |
20 | ||
21 | #include <sys/asm.h> | |
22 | ||
23 | /* Usage: | |
24 | long syscall (syscall_number, arg1, arg2, arg3, arg4, arg5, arg6, arg7) | |
25 | ||
26 | We need to do some arg shifting, syscall_number will be in v0. */ | |
27 | ||
28 | ||
29 | .text | |
30 | NESTED (syscall, SZREG, ra) | |
31 | .mask 0x00010000, -SZREG | |
32 | .fmask 0x00000000, 0 | |
33 | PTR_ADDIU sp, -SZREG | |
34 | REG_S s0, (sp) | |
35 | ||
36 | move s0, a0 | |
37 | move a0, a1 /* shift arg1 - arg7. */ | |
38 | move a1, a2 | |
39 | move a2, a3 | |
40 | move a3, a4 | |
41 | move a4, a5 | |
42 | move a5, a6 | |
43 | move a6, a7 | |
44 | ||
45 | move v0, s0 /* Syscall number -> v0 */ | |
46 | syscall /* Do the system call. */ | |
47 | ||
48 | REG_L s0, (sp) | |
49 | PTR_ADDIU sp, SZREG | |
50 | bne a3, zero, L(error) | |
51 | ||
52 | ret | |
53 | ||
54 | L(error): | |
55 | SETUP_GP64 (a0, syscall) | |
56 | PTR_LA t9, __syscall_error | |
57 | RESTORE_GP64 | |
58 | jr t9 | |
59 | ||
60 | END (syscall) |