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/smp_lock.h>
22 #include <linux/syscalls.h>
23 #include <linux/sem.h>
24 #include <linux/msg.h>
25 #include <linux/shm.h>
26 #include <linux/stat.h>
27 #include <linux/mman.h>
28 #include <linux/sys.h>
29 #include <linux/ipc.h>
30 #include <linux/utsname.h>
31 #include <linux/file.h>
33 #include <asm/uaccess.h>
35 #include <asm/semaphore.h>
36 #include <asm/unistd.h>
39 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
41 * This is really horribly ugly.
44 sys_ipc (uint call, int first, int second, int third, void *ptr, long fifth)
48 version = call >> 16; /* hack for backward compatibility */
54 ret = sys_semop (first, (struct sembuf *)ptr, second);
57 ret = sys_semget (first, second, third);
65 if ((ret = access_ok(VERIFY_READ, ptr, sizeof(long)) ? 0 : -EFAULT)
66 || (ret = get_user(fourth.__pad, (void **)ptr)))
68 ret = sys_semctl (first, second, third, fourth);
72 ret = sys_msgsnd (first, (struct msgbuf *) ptr, second, third);
77 struct ipc_kludge tmp;
81 if ((ret = access_ok(VERIFY_READ, ptr, sizeof(tmp)) ? 0 : -EFAULT)
82 || (ret = copy_from_user(&tmp,
83 (struct ipc_kludge *) ptr,
86 ret = sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp,
91 ret = sys_msgrcv (first, (struct msgbuf *) ptr,
92 second, fifth, third);
97 ret = sys_msgget ((key_t) first, second);
100 ret = sys_msgctl (first, second, (struct msqid_ds *) ptr);
107 if ((ret = access_ok(VERIFY_WRITE, (ulong*) third,
108 sizeof(ulong)) ? 0 : -EFAULT))
110 ret = do_shmat (first, (char *) ptr, second, &raddr);
113 ret = put_user (raddr, (ulong *) third);
116 case 1: /* iBCS2 emulator entry point */
117 if (!segment_eq(get_fs(), get_ds()))
119 ret = do_shmat (first, (char *) ptr, second,
125 ret = sys_shmdt ((char *)ptr);
128 ret = sys_shmget (first, second, third);
131 ret = sys_shmctl (first, second, (struct shmid_ds *) ptr);
139 * sys_pipe() is the normal C calling standard for creating
140 * a pipe. It's not the way unix traditionally does this, though.
142 int sys_pipe (int *fildes)
147 error = do_pipe (fd);
149 if (copy_to_user (fildes, fd, 2*sizeof (int)))
155 static inline unsigned long
156 do_mmap2 (unsigned long addr, size_t len,
157 unsigned long prot, unsigned long flags,
158 unsigned long fd, unsigned long pgoff)
160 struct file * file = NULL;
163 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
164 if (! (flags & MAP_ANONYMOUS)) {
165 if (!(file = fget (fd)))
169 down_write (¤t->mm->mmap_sem);
170 ret = do_mmap_pgoff (file, addr, len, prot, flags, pgoff);
171 up_write (¤t->mm->mmap_sem);
178 unsigned long sys_mmap2 (unsigned long addr, size_t len,
179 unsigned long prot, unsigned long flags,
180 unsigned long fd, unsigned long pgoff)
182 return do_mmap2 (addr, len, prot, flags, fd, pgoff);
185 unsigned long sys_mmap (unsigned long addr, size_t len,
186 unsigned long prot, unsigned long flags,
187 unsigned long fd, off_t offset)
191 if (offset & ~PAGE_MASK)
194 err = do_mmap2 (addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
200 * Do a system call from kernel instead of calling sys_execve so we
201 * end up with proper pt_regs.
203 int kernel_execve(const char *filename, char *const argv[], char *const envp[])
205 register char *__a __asm__ ("r6") = filename;
206 register void *__b __asm__ ("r7") = argv;
207 register void *__c __asm__ ("r8") = envp;
208 register unsigned long __syscall __asm__ ("r12") = __NR_execve;
209 register unsigned long __ret __asm__ ("r10");
210 __asm__ __volatile__ ("trap 0"
211 : "=r" (__ret), "=r" (__syscall)
212 : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c)
213 : "r1", "r5", "r11", "r13", "r14",
214 "r15", "r16", "r17", "r18", "r19");