patch-2.3.43 linux/arch/ia64/kernel/sys_ia64.c

• Lines: 217
• Date: Tue Feb 8 12:01:59 2000
• Orig file: v2.3.42/linux/arch/ia64/kernel/sys_ia64.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.42/linux/arch/ia64/kernel/sys_ia64.c linux/arch/ia64/kernel/sys_ia64.c
@@ -0,0 +1,216 @@
+/*
+ * This file contains various system calls that have different calling
+ * conventions on different platforms.
+ *
+ * Copyright (C) 1999 Hewlett-Packard Co
+ * Copyright (C) 1999 David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/sched.h>
+#include <linux/file.h>		/* doh, must come after sched.h... */
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+
+asmlinkage long
+ia64_getpriority (int which, int who, long arg2, long arg3, long arg4, long arg5, long arg6, 
+		  long arg7, long stack)
+{
+	struct pt_regs *regs = (struct pt_regs *) &stack;
+	extern long sys_getpriority (int, int);
+	long prio;
+
+	prio = sys_getpriority(which, who);
+	if (prio >= 0) {
+		regs->r8 = 0;	/* ensure negative priority is not mistaken as error code */
+		prio = 20 - prio;
+	}
+	return prio;
+}
+
+asmlinkage unsigned long
+sys_getpagesize (void)
+{
+	return PAGE_SIZE;
+}
+
+asmlinkage unsigned long
+ia64_shmat (int shmid, void *shmaddr, int shmflg, long arg3, long arg4, long arg5, long arg6,
+	    long arg7, long stack)
+{
+	extern int sys_shmat (int shmid, char *shmaddr, int shmflg, ulong *raddr);
+	struct pt_regs *regs = (struct pt_regs *) &stack;
+	unsigned long raddr;
+	int retval;
+
+	retval = sys_shmat(shmid, shmaddr, shmflg, &raddr);
+	if (retval < 0)
+		return retval;
+
+	regs->r8 = 0;	/* ensure negative addresses are not mistaken as an error code */
+	return raddr;
+}
+
+asmlinkage unsigned long
+ia64_brk (long brk, long arg1, long arg2, long arg3,
+	  long arg4, long arg5, long arg6, long arg7, long stack)
+{
+	extern unsigned long sys_brk (unsigned long brk);
+	struct pt_regs *regs = (struct pt_regs *) &stack;
+	unsigned long retval;
+
+	retval = sys_brk(brk);
+
+	regs->r8 = 0;	/* ensure large retval isn't mistaken as error code */
+	return retval;
+}
+
+/*
+ * On IA-64, we return the two file descriptors in ret0 and ret1 (r8
+ * and r9) as this is faster than doing a copy_to_user().
+ */
+asmlinkage long
+sys_pipe (long arg0, long arg1, long arg2, long arg3,
+	  long arg4, long arg5, long arg6, long arg7, long stack)
+{
+	struct pt_regs *regs = (struct pt_regs *) &stack;
+	int fd[2];
+	int retval;
+
+	lock_kernel();
+	retval = do_pipe(fd);
+	if (retval)
+		goto out;
+	retval = fd[0];
+	regs->r9 = fd[1];
+  out:
+	unlock_kernel();
+	return retval;
+}
+
+static inline unsigned long
+do_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, unsigned long pgoff)
+{
+	struct file *file = 0;
+
+	/*
+	 * A zero mmap always succeeds in Linux, independent of
+	 * whether or not the remaining arguments are valid.
+	 */
+	if (PAGE_ALIGN(len) == 0)
+		return addr;
+
+#ifdef notyet
+	/* Don't permit mappings that would cross a region boundary: */
+	region_start = IA64_GET_REGION(addr);
+	region_end   = IA64_GET_REGION(addr + len);
+	if (region_start != region_end)
+		return -EINVAL;
+
+	<<x??x>>
+#endif
+
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	if (!(flags & MAP_ANONYMOUS)) {
+		file = fget(fd);
+		if (!file)
+			return -EBADF;
+	}
+
+	down(&current->mm->mmap_sem);
+	lock_kernel();
+
+	addr = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+
+	unlock_kernel();
+	up(&current->mm->mmap_sem);
+
+	if (file)
+		fput(file);
+	return addr;
+}
+
+/*
+ * mmap2() is like mmap() except that the offset is expressed in units
+ * of PAGE_SIZE (instead of bytes).  This allows to mmap2() (pieces
+ * of) files that are larger than the address space of the CPU.
+ */
+asmlinkage unsigned long
+sys_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, long pgoff,
+	   long arg6, long arg7, long stack)
+{
+	struct pt_regs *regs = (struct pt_regs *) &stack;
+
+	addr = do_mmap2(addr, len, prot, flags, fd, pgoff);
+	if (!IS_ERR(addr))
+		regs->r8 = 0;	/* ensure large addresses are not mistaken as failures... */
+	return addr;
+}
+
+asmlinkage unsigned long
+sys_mmap (unsigned long addr, unsigned long len, int prot, int flags,
+	  int fd, long off, long arg6, long arg7, long stack)
+{
+	struct pt_regs *regs = (struct pt_regs *) &stack;
+
+	addr = do_mmap2(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
+	if (!IS_ERR(addr))
+		regs->r8 = 0;	/* ensure large addresses are not mistaken as failures... */
+	return addr;
+}
+
+asmlinkage long
+sys_ioperm (unsigned long from, unsigned long num, int on)
+{
+        printk(KERN_ERR "sys_ioperm(from=%lx, num=%lx, on=%d)\n", from, num, on);
+        return -EIO;
+}
+
+asmlinkage long
+sys_iopl (int level, long arg1, long arg2, long arg3)
+{
+        lock_kernel();
+        printk(KERN_ERR "sys_iopl(level=%d)!\n", level);
+        unlock_kernel();
+        return -ENOSYS;
+}
+
+asmlinkage long
+sys_vm86 (long arg0, long arg1, long arg2, long arg3)
+{
+        lock_kernel();
+        printk(KERN_ERR "sys_vm86(%lx, %lx, %lx, %lx)!\n", arg0, arg1, arg2, arg3);
+        unlock_kernel();
+        return -ENOSYS;
+}
+
+asmlinkage long
+sys_modify_ldt (long arg0, long arg1, long arg2, long arg3)
+{
+        lock_kernel();
+        printk(KERN_ERR "sys_modify_ldt(%lx, %lx, %lx, %lx)!\n", arg0, arg1, arg2, arg3);
+        unlock_kernel();
+        return -ENOSYS;
+}
+
+#ifndef CONFIG_PCI
+
+asmlinkage long
+sys_pciconfig_read (unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len,
+		    void *buf)
+{
+	return -ENOSYS;
+}
+
+asmlinkage long
+sys_pciconfig_write (unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len,
+		     void *buf)
+{
+	return -ENOSYS;
+}
+
+
+#endif /* CONFIG_PCI */