Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* sys_frv.c: FRV arch-specific syscall wrappers |
| 2 | * |
| 3 | * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * - Derived from arch/m68k/kernel/sys_m68k.c |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/errno.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/mm.h> |
Alexey Dobriyan | 4e950f6 | 2007-07-30 02:36:13 +0400 | [diff] [blame] | 16 | #include <linux/fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/sem.h> |
| 19 | #include <linux/msg.h> |
| 20 | #include <linux/shm.h> |
| 21 | #include <linux/stat.h> |
| 22 | #include <linux/mman.h> |
| 23 | #include <linux/file.h> |
| 24 | #include <linux/utsname.h> |
| 25 | #include <linux/syscalls.h> |
| 26 | |
| 27 | #include <asm/setup.h> |
| 28 | #include <asm/uaccess.h> |
| 29 | #include <asm/ipc.h> |
| 30 | |
| 31 | /* |
| 32 | * sys_pipe() is the normal C calling standard for creating |
| 33 | * a pipe. It's not the way unix traditionally does this, though. |
| 34 | */ |
Al Viro | 53470aa | 2006-06-23 02:04:06 -0700 | [diff] [blame] | 35 | asmlinkage long sys_pipe(unsigned long __user * fildes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | { |
| 37 | int fd[2]; |
| 38 | int error; |
| 39 | |
| 40 | error = do_pipe(fd); |
| 41 | if (!error) { |
| 42 | if (copy_to_user(fildes, fd, 2*sizeof(int))) |
| 43 | error = -EFAULT; |
| 44 | } |
| 45 | return error; |
| 46 | } |
| 47 | |
| 48 | asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, |
| 49 | unsigned long prot, unsigned long flags, |
| 50 | unsigned long fd, unsigned long pgoff) |
| 51 | { |
| 52 | int error = -EBADF; |
| 53 | struct file * file = NULL; |
| 54 | |
| 55 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); |
| 56 | if (!(flags & MAP_ANONYMOUS)) { |
| 57 | file = fget(fd); |
| 58 | if (!file) |
| 59 | goto out; |
| 60 | } |
| 61 | |
| 62 | /* As with sparc32, make sure the shift for mmap2 is constant |
| 63 | (12), no matter what PAGE_SIZE we have.... */ |
| 64 | |
| 65 | /* But unlike sparc32, don't just silently break if we're |
| 66 | trying to map something we can't */ |
| 67 | if (pgoff & ((1<<(PAGE_SHIFT-12))-1)) |
| 68 | return -EINVAL; |
| 69 | |
| 70 | pgoff >>= (PAGE_SHIFT - 12); |
| 71 | |
| 72 | down_write(¤t->mm->mmap_sem); |
| 73 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); |
| 74 | up_write(¤t->mm->mmap_sem); |
| 75 | |
| 76 | if (file) |
| 77 | fput(file); |
| 78 | out: |
| 79 | return error; |
| 80 | } |
| 81 | |
| 82 | #if 0 /* DAVIDM - do we want this */ |
| 83 | struct mmap_arg_struct64 { |
| 84 | __u32 addr; |
| 85 | __u32 len; |
| 86 | __u32 prot; |
| 87 | __u32 flags; |
| 88 | __u64 offset; /* 64 bits */ |
| 89 | __u32 fd; |
| 90 | }; |
| 91 | |
| 92 | asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg) |
| 93 | { |
| 94 | int error = -EFAULT; |
| 95 | struct file * file = NULL; |
| 96 | struct mmap_arg_struct64 a; |
| 97 | unsigned long pgoff; |
| 98 | |
| 99 | if (copy_from_user(&a, arg, sizeof(a))) |
| 100 | return -EFAULT; |
| 101 | |
| 102 | if ((long)a.offset & ~PAGE_MASK) |
| 103 | return -EINVAL; |
| 104 | |
| 105 | pgoff = a.offset >> PAGE_SHIFT; |
| 106 | if ((a.offset >> PAGE_SHIFT) != pgoff) |
| 107 | return -EINVAL; |
| 108 | |
| 109 | if (!(a.flags & MAP_ANONYMOUS)) { |
| 110 | error = -EBADF; |
| 111 | file = fget(a.fd); |
| 112 | if (!file) |
| 113 | goto out; |
| 114 | } |
| 115 | a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); |
| 116 | |
| 117 | down_write(¤t->mm->mmap_sem); |
| 118 | error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff); |
| 119 | up_write(¤t->mm->mmap_sem); |
| 120 | if (file) |
| 121 | fput(file); |
| 122 | out: |
| 123 | return error; |
| 124 | } |
| 125 | #endif |
| 126 | |
| 127 | /* |
| 128 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. |
| 129 | * |
| 130 | * This is really horribly ugly. |
| 131 | */ |
| 132 | asmlinkage long sys_ipc(unsigned long call, |
| 133 | unsigned long first, |
| 134 | unsigned long second, |
| 135 | unsigned long third, |
| 136 | void __user *ptr, |
| 137 | unsigned long fifth) |
| 138 | { |
| 139 | int version, ret; |
| 140 | |
| 141 | version = call >> 16; /* hack for backward compatibility */ |
| 142 | call &= 0xffff; |
| 143 | |
| 144 | switch (call) { |
| 145 | case SEMOP: |
| 146 | return sys_semtimedop(first, (struct sembuf __user *)ptr, second, NULL); |
| 147 | case SEMTIMEDOP: |
| 148 | return sys_semtimedop(first, (struct sembuf __user *)ptr, second, |
| 149 | (const struct timespec __user *)fifth); |
| 150 | |
| 151 | case SEMGET: |
| 152 | return sys_semget (first, second, third); |
| 153 | case SEMCTL: { |
| 154 | union semun fourth; |
| 155 | if (!ptr) |
| 156 | return -EINVAL; |
| 157 | if (get_user(fourth.__pad, (void * __user *) ptr)) |
| 158 | return -EFAULT; |
| 159 | return sys_semctl (first, second, third, fourth); |
| 160 | } |
| 161 | |
| 162 | case MSGSND: |
| 163 | return sys_msgsnd (first, (struct msgbuf __user *) ptr, |
| 164 | second, third); |
| 165 | case MSGRCV: |
| 166 | switch (version) { |
| 167 | case 0: { |
| 168 | struct ipc_kludge tmp; |
| 169 | if (!ptr) |
| 170 | return -EINVAL; |
| 171 | |
| 172 | if (copy_from_user(&tmp, |
| 173 | (struct ipc_kludge __user *) ptr, |
| 174 | sizeof (tmp))) |
| 175 | return -EFAULT; |
| 176 | return sys_msgrcv (first, tmp.msgp, second, |
| 177 | tmp.msgtyp, third); |
| 178 | } |
| 179 | default: |
| 180 | return sys_msgrcv (first, |
| 181 | (struct msgbuf __user *) ptr, |
| 182 | second, fifth, third); |
| 183 | } |
| 184 | case MSGGET: |
| 185 | return sys_msgget ((key_t) first, second); |
| 186 | case MSGCTL: |
| 187 | return sys_msgctl (first, second, (struct msqid_ds __user *) ptr); |
| 188 | |
| 189 | case SHMAT: |
| 190 | switch (version) { |
| 191 | default: { |
| 192 | ulong raddr; |
| 193 | ret = do_shmat (first, (char __user *) ptr, second, &raddr); |
| 194 | if (ret) |
| 195 | return ret; |
| 196 | return put_user (raddr, (ulong __user *) third); |
| 197 | } |
| 198 | case 1: /* iBCS2 emulator entry point */ |
| 199 | if (!segment_eq(get_fs(), get_ds())) |
| 200 | return -EINVAL; |
| 201 | /* The "(ulong *) third" is valid _only_ because of the kernel segment thing */ |
| 202 | return do_shmat (first, (char __user *) ptr, second, (ulong *) third); |
| 203 | } |
| 204 | case SHMDT: |
| 205 | return sys_shmdt ((char __user *)ptr); |
| 206 | case SHMGET: |
| 207 | return sys_shmget (first, second, third); |
| 208 | case SHMCTL: |
| 209 | return sys_shmctl (first, second, |
| 210 | (struct shmid_ds __user *) ptr); |
| 211 | default: |
| 212 | return -ENOSYS; |
| 213 | } |
| 214 | } |