patch-2.4.0-test12 linux/arch/parisc/kernel/sys_parisc.c

• Lines: 89
• Date: Tue Dec 5 12:29:39 2000
• Orig file: v2.4.0-test11/linux/arch/parisc/kernel/sys_parisc.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test11/linux/arch/parisc/kernel/sys_parisc.c linux/arch/parisc/kernel/sys_parisc.c
@@ -0,0 +1,88 @@
+/*
+ * 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(&current->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(&current->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;
+}