Viewing file:  sys_parisc.c (1.73 KB) -rw-r--r--
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/*
* linux/arch/parisc/kernel/sys_parisc.c
*
* this implements the missing syscalls.
*/
#include <asm/uaccess.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/linkage.h>
#include <linux/mm.h>
#include <linux/mman.h>
#include <linux/smp_lock.h>
/* for some reason, "old_readdir" is the only syscall which does not begin
* with "sys_", which breaks the ENTRY_* macros in syscall.S so I "fixed"
* it here.
*/
int sys_old_readdir(unsigned int fd, void *dirent, unsigned int count)
{
return old_readdir(fd, dirent, count);
}
int sys_pipe(int *fildes)
{
int fd[2];
int error;
lock_kernel();
error = do_pipe(fd);
unlock_kernel();
if (!error) {
if (copy_to_user(fildes, fd, 2*sizeof(int)))
error = -EFAULT;
}
return error;
}
int sys_pause(void)
{
current->state = TASK_INTERRUPTIBLE;
schedule();
return -ERESTARTNOHAND;
}
int sys_mmap(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags, unsigned long fd,
unsigned long offset)
{
struct file * file = NULL;
int error;
down_write(¤t->mm->mmap_sem);
lock_kernel();
if (!(flags & MAP_ANONYMOUS)) {
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
}
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
error = do_mmap(file, addr, len, prot, flags, offset);
if (file != NULL)
fput(file);
out:
unlock_kernel();
up_write(¤t->mm->mmap_sem);
return error;
}
int sys_ioperm(unsigned long from, unsigned long num, int on)
{
return -ENOSYS;
}
long sys_shmat_wrapper(int shmid, void *shmaddr, int shmflag)
{
extern int sys_shmat(int shmid, char *shmaddr, int shmflg,
unsigned long * raddr);
unsigned long raddr;
int r;
r = sys_shmat(shmid, shmaddr, shmflag, &raddr);
if (r < 0)
return r;
return raddr;
}
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