2 * arch/v850/kernel/syscalls.c -- Various system-call definitions not
3 * defined in machine-independent code
5 * Copyright (C) 2001,02 NEC Corporation
6 * Copyright (C) 2001,02 Miles Bader <miles@gnu.org>
8 * This file is subject to the terms and conditions of the GNU General
9 * Public License. See the file COPYING in the main directory of this
10 * archive for more details.
12 * This file was derived the ppc version, arch/ppc/kernel/syscalls.c
13 * ... which was derived from "arch/i386/kernel/sys_i386.c" by Gary Thomas;
14 * modified by Cort Dougan (cort@cs.nmt.edu)
15 * and Paul Mackerras (paulus@cs.anu.edu.au).
18 #include <linux/errno.h>
20 #include <linux/smp.h>
21 #include <linux/syscalls.h>
22 #include <linux/sem.h>
23 #include <linux/msg.h>
24 #include <linux/shm.h>
25 #include <linux/stat.h>
26 #include <linux/mman.h>
27 #include <linux/sys.h>
28 #include <linux/ipc.h>
29 #include <linux/utsname.h>
30 #include <linux/file.h>
32 #include <asm/uaccess.h>
33 #include <asm/unistd.h>
36 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
38 * This is really horribly ugly.
41 sys_ipc (uint call, int first, int second, int third, void *ptr, long fifth)
45 version = call >> 16; /* hack for backward compatibility */
51 ret = sys_semop (first, (struct sembuf *)ptr, second);
54 ret = sys_semget (first, second, third);
62 if ((ret = access_ok(VERIFY_READ, ptr, sizeof(long)) ? 0 : -EFAULT)
63 || (ret = get_user(fourth.__pad, (void **)ptr)))
65 ret = sys_semctl (first, second, third, fourth);
69 ret = sys_msgsnd (first, (struct msgbuf *) ptr, second, third);
74 struct ipc_kludge tmp;
78 if ((ret = access_ok(VERIFY_READ, ptr, sizeof(tmp)) ? 0 : -EFAULT)
79 || (ret = copy_from_user(&tmp,
80 (struct ipc_kludge *) ptr,
83 ret = sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp,
88 ret = sys_msgrcv (first, (struct msgbuf *) ptr,
89 second, fifth, third);
94 ret = sys_msgget ((key_t) first, second);
97 ret = sys_msgctl (first, second, (struct msqid_ds *) ptr);
104 if ((ret = access_ok(VERIFY_WRITE, (ulong*) third,
105 sizeof(ulong)) ? 0 : -EFAULT))
107 ret = do_shmat (first, (char *) ptr, second, &raddr);
110 ret = put_user (raddr, (ulong *) third);
113 case 1: /* iBCS2 emulator entry point */
114 if (!segment_eq(get_fs(), get_ds()))
116 ret = do_shmat (first, (char *) ptr, second,
122 ret = sys_shmdt ((char *)ptr);
125 ret = sys_shmget (first, second, third);
128 ret = sys_shmctl (first, second, (struct shmid_ds *) ptr);
136 * sys_pipe() is the normal C calling standard for creating
137 * a pipe. It's not the way unix traditionally does this, though.
139 int sys_pipe (int *fildes)
144 error = do_pipe (fd);
146 if (copy_to_user (fildes, fd, 2*sizeof (int)))
152 static inline unsigned long
153 do_mmap2 (unsigned long addr, size_t len,
154 unsigned long prot, unsigned long flags,
155 unsigned long fd, unsigned long pgoff)
157 struct file * file = NULL;
160 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
161 if (! (flags & MAP_ANONYMOUS)) {
162 if (!(file = fget (fd)))
166 down_write (¤t->mm->mmap_sem);
167 ret = do_mmap_pgoff (file, addr, len, prot, flags, pgoff);
168 up_write (¤t->mm->mmap_sem);
175 unsigned long sys_mmap2 (unsigned long addr, size_t len,
176 unsigned long prot, unsigned long flags,
177 unsigned long fd, unsigned long pgoff)
179 return do_mmap2 (addr, len, prot, flags, fd, pgoff);
182 unsigned long sys_mmap (unsigned long addr, size_t len,
183 unsigned long prot, unsigned long flags,
184 unsigned long fd, off_t offset)
188 if (offset & ~PAGE_MASK)
191 err = do_mmap2 (addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
197 * Do a system call from kernel instead of calling sys_execve so we
198 * end up with proper pt_regs.
200 int kernel_execve(const char *filename, char *const argv[], char *const envp[])
202 register char *__a __asm__ ("r6") = filename;
203 register void *__b __asm__ ("r7") = argv;
204 register void *__c __asm__ ("r8") = envp;
205 register unsigned long __syscall __asm__ ("r12") = __NR_execve;
206 register unsigned long __ret __asm__ ("r10");
207 __asm__ __volatile__ ("trap 0"
208 : "=r" (__ret), "=r" (__syscall)
209 : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c)
210 : "r1", "r5", "r11", "r13", "r14",
211 "r15", "r16", "r17", "r18", "r19");