projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 52 | error = do_pipe(fd); | |
| 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 |