2 * linux/arch/m32r/kernel/sys_m32r.c
4 * This file contains various random system calls that
5 * have a non-standard calling sequence on the Linux/M32R platform.
7 * Taken from i386 version.
10 #include <linux/config.h>
11 #include <linux/errno.h>
12 #include <linux/sched.h>
14 #include <linux/smp.h>
15 #include <linux/smp_lock.h>
16 #include <linux/sem.h>
17 #include <linux/msg.h>
18 #include <linux/shm.h>
19 #include <linux/stat.h>
20 #include <linux/syscalls.h>
21 #include <linux/mman.h>
22 #include <linux/file.h>
23 #include <linux/utsname.h>
25 #include <asm/uaccess.h>
26 #include <asm/cachectl.h>
27 #include <asm/cacheflush.h>
31 * sys_tas() - test-and-set
32 * linuxthreads testing version
35 asmlinkage
int sys_tas(int *addr
)
40 if (!access_ok(VERIFY_WRITE
, addr
, sizeof (int)))
42 local_irq_save(flags
);
46 local_irq_restore(flags
);
49 #else /* CONFIG_SMP */
50 #include <linux/spinlock.h>
52 static DEFINE_SPINLOCK(tas_lock
);
54 asmlinkage
int sys_tas(int *addr
)
58 if (!access_ok(VERIFY_WRITE
, addr
, sizeof (int)))
61 _raw_spin_lock(&tas_lock
);
65 _raw_spin_unlock(&tas_lock
);
69 #endif /* CONFIG_SMP */
72 * sys_pipe() is the normal C calling standard for creating
73 * a pipe. It's not the way Unix traditionally does this, though.
76 sys_pipe(unsigned long r0
, unsigned long r1
, unsigned long r2
,
77 unsigned long r3
, unsigned long r4
, unsigned long r5
,
78 unsigned long r6
, struct pt_regs regs
)
85 if (copy_to_user((void *)r0
, (void *)fd
, 2*sizeof(int)))
91 asmlinkage
long sys_mmap2(unsigned long addr
, unsigned long len
,
92 unsigned long prot
, unsigned long flags
,
93 unsigned long fd
, unsigned long pgoff
)
96 struct file
*file
= NULL
;
98 flags
&= ~(MAP_EXECUTABLE
| MAP_DENYWRITE
);
99 if (!(flags
& MAP_ANONYMOUS
)) {
105 down_write(¤t
->mm
->mmap_sem
);
106 error
= do_mmap_pgoff(file
, addr
, len
, prot
, flags
, pgoff
);
107 up_write(¤t
->mm
->mmap_sem
);
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 __user
*ptr
, long fifth
)
125 version
= call
>> 16; /* hack for backward compatibility */
130 return sys_semtimedop(first
, (struct sembuf __user
*)ptr
,
133 return sys_semtimedop(first
, (struct sembuf __user
*)ptr
,
134 second
, (const struct timespec __user
*)fifth
);
136 return sys_semget (first
, second
, third
);
141 if (get_user(fourth
.__pad
, (void __user
* __user
*) ptr
))
143 return sys_semctl (first
, second
, third
, fourth
);
147 return sys_msgsnd (first
, (struct msgbuf __user
*) ptr
,
152 struct ipc_kludge tmp
;
156 if (copy_from_user(&tmp
,
157 (struct ipc_kludge __user
*) ptr
,
160 return sys_msgrcv (first
, tmp
.msgp
, second
,
164 return sys_msgrcv (first
,
165 (struct msgbuf __user
*) ptr
,
166 second
, fifth
, third
);
169 return sys_msgget ((key_t
) first
, second
);
171 return sys_msgctl (first
, second
,
172 (struct msqid_ds __user
*) ptr
);
176 if (!access_ok(VERIFY_WRITE
, (ulong __user
*) third
,
179 ret
= do_shmat (first
, (char __user
*) ptr
, second
, &raddr
);
182 return put_user (raddr
, (ulong __user
*) third
);
185 return sys_shmdt ((char __user
*)ptr
);
187 return sys_shmget (first
, second
, third
);
189 return sys_shmctl (first
, second
,
190 (struct shmid_ds __user
*) ptr
);
196 asmlinkage
int sys_uname(struct old_utsname
* name
)
202 err
=copy_to_user(name
, &system_utsname
, sizeof (*name
));
204 return err
?-EFAULT
:0;
207 asmlinkage
int sys_cacheflush(void *addr
, int bytes
, int cache
)
209 /* This should flush more selectivly ... */
214 asmlinkage
int sys_cachectl(char *addr
, int nbytes
, int op
)
216 /* Not implemented yet. */
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