2 * linux/arch/m68knommu/kernel/sys_m68k.c
4 * This file contains various random system calls that
5 * have a non-standard calling sequence on the Linux/m68k
9 #include <linux/errno.h>
10 #include <linux/sched.h>
12 #include <linux/smp.h>
13 #include <linux/sem.h>
14 #include <linux/msg.h>
15 #include <linux/shm.h>
16 #include <linux/stat.h>
17 #include <linux/syscalls.h>
18 #include <linux/mman.h>
19 #include <linux/file.h>
20 #include <linux/utsname.h>
21 #include <linux/ipc.h>
24 #include <asm/setup.h>
25 #include <asm/uaccess.h>
26 #include <asm/cachectl.h>
27 #include <asm/traps.h>
28 #include <asm/cacheflush.h>
29 #include <asm/unistd.h>
31 /* common code for old and new mmaps */
32 static inline long do_mmap2(
33 unsigned long addr, unsigned long len,
34 unsigned long prot, unsigned long flags,
35 unsigned long fd, unsigned long pgoff)
38 struct file * file = NULL;
40 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
41 if (!(flags & MAP_ANONYMOUS)) {
47 down_write(¤t->mm->mmap_sem);
48 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
49 up_write(¤t->mm->mmap_sem);
57 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
58 unsigned long prot, unsigned long flags,
59 unsigned long fd, unsigned long pgoff)
61 return do_mmap2(addr, len, prot, flags, fd, pgoff);
65 * Perform the select(nd, in, out, ex, tv) and mmap() system
66 * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
67 * handle more than 4 system call parameters, so these system calls
68 * used a memory block for parameter passing..
71 struct mmap_arg_struct {
80 asmlinkage int old_mmap(struct mmap_arg_struct *arg)
82 struct mmap_arg_struct a;
85 if (copy_from_user(&a, arg, sizeof(a)))
89 if (a.offset & ~PAGE_MASK)
92 a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
94 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
99 struct sel_arg_struct {
101 fd_set *inp, *outp, *exp;
105 asmlinkage int old_select(struct sel_arg_struct *arg)
107 struct sel_arg_struct a;
109 if (copy_from_user(&a, arg, sizeof(a)))
111 /* sys_select() does the appropriate kernel locking */
112 return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
116 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
118 * This is really horribly ugly.
120 asmlinkage int sys_ipc (uint call, int first, int second,
121 int third, void *ptr, long fifth)
125 version = call >> 16; /* hack for backward compatibility */
131 return sys_semop (first, (struct sembuf *)ptr, second);
133 return sys_semget (first, second, third);
138 if (get_user(fourth.__pad, (void **) ptr))
140 return sys_semctl (first, second, third, fourth);
148 return sys_msgsnd (first, (struct msgbuf *) ptr,
153 struct ipc_kludge tmp;
156 if (copy_from_user (&tmp,
157 (struct ipc_kludge *)ptr,
160 return sys_msgrcv (first, tmp.msgp, second,
164 return sys_msgrcv (first,
165 (struct msgbuf *) ptr,
166 second, fifth, third);
169 return sys_msgget ((key_t) first, second);
171 return sys_msgctl (first, second,
172 (struct msqid_ds *) ptr);
182 ret = do_shmat (first, ptr, second, &raddr);
185 return put_user (raddr, (ulong __user *) third);
189 return sys_shmdt (ptr);
191 return sys_shmget (first, second, third);
193 return sys_shmctl (first, second, ptr);
201 /* sys_cacheflush -- flush (part of) the processor cache. */
203 sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
209 asmlinkage int sys_getpagesize(void)
215 * Do a system call from kernel instead of calling sys_execve so we
216 * end up with proper pt_regs.
218 int kernel_execve(const char *filename, char *const argv[], char *const envp[])
220 register long __res asm ("%d0") = __NR_execve;
221 register long __a asm ("%d1") = (long)(filename);
222 register long __b asm ("%d2") = (long)(argv);
223 register long __c asm ("%d3") = (long)(envp);
224 asm volatile ("trap #0" : "+d" (__res)
225 : "d" (__a), "d" (__b), "d" (__c));