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fc4fb2ad CZ |
1 | /* |
2 | * arch/xtensa/kernel/syscall.c | |
3 | * | |
4 | * This file is subject to the terms and conditions of the GNU General Public | |
5 | * License. See the file "COPYING" in the main directory of this archive | |
6 | * for more details. | |
7 | * | |
8 | * Copyright (C) 2001 - 2005 Tensilica Inc. | |
9 | * Copyright (C) 2000 Silicon Graphics, Inc. | |
10 | * Copyright (C) 1995 - 2000 by Ralf Baechle | |
11 | * | |
12 | * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com> | |
13 | * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca> | |
14 | * Chris Zankel <chris@zankel.net> | |
15 | * Kevin Chea | |
16 | * | |
17 | */ | |
18 | #include <asm/uaccess.h> | |
1c0350bd | 19 | #include <asm/syscall.h> |
fc4fb2ad CZ |
20 | #include <asm/unistd.h> |
21 | #include <linux/linkage.h> | |
22 | #include <linux/stringify.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/syscalls.h> | |
25 | #include <linux/file.h> | |
26 | #include <linux/fs.h> | |
27 | #include <linux/mman.h> | |
28 | #include <linux/shm.h> | |
29 | ||
30 | typedef void (*syscall_t)(void); | |
31 | ||
32 | syscall_t sys_call_table[__NR_syscall_count] /* FIXME __cacheline_aligned */= { | |
33 | [0 ... __NR_syscall_count - 1] = (syscall_t)&sys_ni_syscall, | |
34 | ||
35 | #undef __SYSCALL | |
36 | #define __SYSCALL(nr,symbol,nargs) [ nr ] = (syscall_t)symbol, | |
37 | #undef _XTENSA_UNISTD_H | |
38 | #undef __KERNEL_SYSCALLS__ | |
39 | #include <asm/unistd.h> | |
40 | }; | |
41 | ||
42 | /* | |
43 | * xtensa_pipe() is the normal C calling standard for creating a pipe. It's not | |
44 | * the way unix traditional does this, though. | |
45 | */ | |
46 | ||
47 | asmlinkage long xtensa_pipe(int __user *userfds) | |
48 | { | |
49 | int fd[2]; | |
50 | int error; | |
51 | ||
ed8cae8b | 52 | error = do_pipe_flags(fd, 0); |
fc4fb2ad CZ |
53 | if (!error) { |
54 | if (copy_to_user(userfds, fd, 2 * sizeof(int))) | |
55 | error = -EFAULT; | |
56 | } | |
57 | return error; | |
58 | } | |
59 | ||
60 | ||
61 | asmlinkage long xtensa_mmap2(unsigned long addr, unsigned long len, | |
62 | unsigned long prot, unsigned long flags, | |
63 | unsigned long fd, unsigned long pgoff) | |
64 | { | |
65 | int error = -EBADF; | |
66 | struct file * file = NULL; | |
67 | ||
68 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
69 | if (!(flags & MAP_ANONYMOUS)) { | |
70 | file = fget(fd); | |
71 | if (!file) | |
72 | goto out; | |
73 | } | |
74 | ||
75 | down_write(¤t->mm->mmap_sem); | |
76 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
77 | up_write(¤t->mm->mmap_sem); | |
78 | ||
79 | if (file) | |
80 | fput(file); | |
81 | out: | |
82 | return error; | |
83 | } | |
84 | ||
85 | asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg) | |
86 | { | |
87 | unsigned long ret; | |
88 | long err; | |
89 | ||
90 | err = do_shmat(shmid, shmaddr, shmflg, &ret); | |
91 | if (err) | |
92 | return err; | |
93 | return (long)ret; | |
94 | } | |
95 | ||
bc671aa9 CZ |
96 | asmlinkage long xtensa_fadvise64_64(int fd, int advice, unsigned long long offset, unsigned long long len) |
97 | { | |
98 | return sys_fadvise64_64(fd, offset, len, advice); | |
99 | } | |
100 |