patch-2.1.42 linux/arch/sparc64/kernel/ioctl32.c

• Lines: 51
• Date: Wed May 28 10:49:08 1997
• Orig file: v2.1.41/linux/arch/sparc64/kernel/ioctl32.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.41/linux/arch/sparc64/kernel/ioctl32.c linux/arch/sparc64/kernel/ioctl32.c
@@ -0,0 +1,50 @@
+/* $Id: ioctl32.c,v 1.3 1997/05/27 19:30:13 jj Exp $
+ * ioctl32.c: Conversion between 32bit and 64bit native ioctls.
+ *
+ * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ *
+ * These routines maintain argument size conversion between 32bit and 64bit
+ * ioctls.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/ioctl.h>
+
+#include <asm/types.h>
+#include <asm/uaccess.h>
+
+/* As gcc will warn about casting u32 to some ptr, we have to cast it to unsigned long first, and that's what is A() for.
+ * You just do (void *)A(x), instead of having to type (void *)((unsigned long)x) or instead of just (void *)x, which will
+ * produce warnings */
+#define A(x) ((unsigned long)x)
+
+extern asmlinkage int sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg);
+ 
+asmlinkage int sys32_ioctl(unsigned int fd, unsigned int cmd, u32 arg)
+{
+	struct file * filp;
+	int error = -EBADF;
+
+	lock_kernel();
+	if (fd >= NR_OPEN || !(filp = current->files->fd[fd]))
+		goto out;
+	if (!filp->f_op || !filp->f_op->ioctl) {
+		error = sys_ioctl (fd, cmd, (unsigned long)arg);
+		goto out;
+	}
+	error = 0;
+	switch (cmd) {
+		default:
+			error = sys_ioctl (fd, cmd, (unsigned long)arg);
+			goto out;
+	}
+out:
+	if (error == -EINVAL) {
+		printk ("sys32_ioctl on %016lx's %08x returns EINVAL\n", filp->f_op ? (long)filp->f_op->ioctl : 0UL, cmd);
+	}
+	unlock_kernel();
+	return error;
+}