2 * linux/arch/sh/kernel/sys_sh.c
4 * This file contains various random system calls that
5 * have a non-standard calling sequence on the Linux/SuperH
8 * Taken from i386 version.
10 #include <linux/errno.h>
11 #include <linux/sched.h>
13 #include <linux/smp.h>
14 #include <linux/sem.h>
15 #include <linux/msg.h>
16 #include <linux/shm.h>
17 #include <linux/stat.h>
18 #include <linux/syscalls.h>
19 #include <linux/mman.h>
20 #include <linux/file.h>
21 #include <linux/utsname.h>
22 #include <linux/module.h>
24 #include <linux/ipc.h>
25 #include <asm/syscalls.h>
26 #include <asm/uaccess.h>
27 #include <asm/unistd.h>
28 #include <asm/cacheflush.h>
29 #include <asm/cachectl.h>
32 do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
33 unsigned long flags, int fd, unsigned long pgoff)
36 struct file *file = NULL;
38 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
39 if (!(flags & MAP_ANONYMOUS)) {
45 down_write(¤t->mm->mmap_sem);
46 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
47 up_write(¤t->mm->mmap_sem);
55 asmlinkage int old_mmap(unsigned long addr, unsigned long len,
56 unsigned long prot, unsigned long flags,
57 int fd, unsigned long off)
61 return do_mmap2(addr, len, prot, flags, fd, off>>PAGE_SHIFT);
64 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
65 unsigned long prot, unsigned long flags,
66 unsigned long fd, unsigned long pgoff)
69 * The shift for mmap2 is constant, regardless of PAGE_SIZE
72 if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1))
75 pgoff >>= PAGE_SHIFT - 12;
77 return do_mmap2(addr, len, prot, flags, fd, pgoff);
81 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
83 * This is really horribly ugly.
85 asmlinkage int sys_ipc(uint call, int first, int second,
86 int third, void __user *ptr, long fifth)
90 version = call >> 16; /* hack for backward compatibility */
93 if (call <= SEMTIMEDOP)
96 return sys_semtimedop(first,
97 (struct sembuf __user *)ptr,
100 return sys_semtimedop(first,
101 (struct sembuf __user *)ptr, second,
102 (const struct timespec __user *)fifth);
104 return sys_semget (first, second, third);
109 if (get_user(fourth.__pad, (void __user * __user *) ptr))
111 return sys_semctl (first, second, third, fourth);
120 return sys_msgsnd (first, (struct msgbuf __user *) ptr,
126 struct ipc_kludge tmp;
131 if (copy_from_user(&tmp,
132 (struct ipc_kludge __user *) ptr,
136 return sys_msgrcv (first, tmp.msgp, second,
140 return sys_msgrcv (first,
141 (struct msgbuf __user *) ptr,
142 second, fifth, third);
145 return sys_msgget ((key_t) first, second);
147 return sys_msgctl (first, second,
148 (struct msqid_ds __user *) ptr);
158 ret = do_shmat (first, (char __user *) ptr,
162 return put_user (raddr, (ulong __user *) third);
164 case 1: /* iBCS2 emulator entry point */
165 if (!segment_eq(get_fs(), get_ds()))
167 return do_shmat (first, (char __user *) ptr,
168 second, (ulong *) third);
171 return sys_shmdt ((char __user *)ptr);
173 return sys_shmget (first, second, third);
175 return sys_shmctl (first, second,
176 (struct shmid_ds __user *) ptr);
184 /* sys_cacheflush -- flush (part of) the processor cache. */
185 asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op)
187 struct vm_area_struct *vma;
189 if ((op <= 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))
193 * Verify that the specified address region actually belongs
196 if (addr + len < addr)
199 down_read(¤t->mm->mmap_sem);
200 vma = find_vma (current->mm, addr);
201 if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) {
202 up_read(¤t->mm->mmap_sem);
206 switch (op & CACHEFLUSH_D_PURGE) {
207 case CACHEFLUSH_D_INVAL:
208 __flush_invalidate_region((void *)addr, len);
210 case CACHEFLUSH_D_WB:
211 __flush_wback_region((void *)addr, len);
213 case CACHEFLUSH_D_PURGE:
214 __flush_purge_region((void *)addr, len);
218 if (op & CACHEFLUSH_I)
221 up_read(¤t->mm->mmap_sem);
225 asmlinkage int sys_uname(struct old_utsname __user *name)
231 err = copy_to_user(name, utsname(), sizeof(*name));
233 return err?-EFAULT:0;