1 files changed, 298 insertions, 0 deletions
diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c
new file mode 100644
index 00000000000..3ac216e1c8b
--- /dev/null
+++ b/arch/ia64/kernel/sys_ia64.c
@@ -0,0 +1,298 @@
+/*
+ * This file contains various system calls that have different calling
+ * conventions on different platforms.
+ *
+ * Copyright (C) 1999-2000, 2002-2003, 2005 Hewlett-Packard Co
+ *	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/shm.h>
+#include <linux/file.h>		/* doh, must come after sched.h... */
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/syscalls.h>
+#include <linux/highuid.h>
+#include <linux/hugetlb.h>
+
+#include <asm/shmparam.h>
+#include <asm/uaccess.h>
+
+unsigned long
+arch_get_unmapped_area (struct file *filp, unsigned long addr, unsigned long len,
+			unsigned long pgoff, unsigned long flags)
+{
+	long map_shared = (flags & MAP_SHARED);
+	unsigned long start_addr, align_mask = PAGE_SIZE - 1;
+	struct mm_struct *mm = current->mm;
+	struct vm_area_struct *vma;
+
+	if (len > RGN_MAP_LIMIT)
+		return -ENOMEM;
+
+#ifdef CONFIG_HUGETLB_PAGE
+	if (REGION_NUMBER(addr) == REGION_HPAGE)
+		addr = 0;
+#endif
+	if (!addr)
+		addr = mm->free_area_cache;
+
+	if (map_shared && (TASK_SIZE > 0xfffffffful))
+		/*
+		 * For 64-bit tasks, align shared segments to 1MB to avoid potential
+		 * performance penalty due to virtual aliasing (see ASDM).  For 32-bit
+		 * tasks, we prefer to avoid exhausting the address space too quickly by
+		 * limiting alignment to a single page.
+		 */
+		align_mask = SHMLBA - 1;
+
+  full_search:
+	start_addr = addr = (addr + align_mask) & ~align_mask;
+
+	for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+		/* At this point:  (!vma || addr < vma->vm_end). */
+		if (TASK_SIZE - len < addr || RGN_MAP_LIMIT - len < REGION_OFFSET(addr)) {
+			if (start_addr != TASK_UNMAPPED_BASE) {
+				/* Start a new search --- just in case we missed some holes.  */
+				addr = TASK_UNMAPPED_BASE;
+				goto full_search;
+			}
+			return -ENOMEM;
+		}
+		if (!vma || addr + len <= vma->vm_start) {
+			/* Remember the address where we stopped this search:  */
+			mm->free_area_cache = addr + len;
+			return addr;
+		}
+		addr = (vma->vm_end + align_mask) & ~align_mask;
+	}
+}
+
+asmlinkage long
+ia64_getpriority (int which, int who)
+{
+	long prio;
+
+	prio = sys_getpriority(which, who);
+	if (prio >= 0) {
+		force_successful_syscall_return();
+		prio = 20 - prio;
+	}
+	return prio;
+}
+
+/* XXX obsolete, but leave it here until the old libc is gone... */
+asmlinkage unsigned long
+sys_getpagesize (void)
+{
+	return PAGE_SIZE;
+}
+
+asmlinkage unsigned long
+ia64_shmat (int shmid, void __user *shmaddr, int shmflg)
+{
+	unsigned long raddr;
+	int retval;
+
+	retval = do_shmat(shmid, shmaddr, shmflg, &raddr);
+	if (retval < 0)
+		return retval;
+
+	force_successful_syscall_return();
+	return raddr;
+}
+
+asmlinkage unsigned long
+ia64_brk (unsigned long brk)
+{
+	unsigned long rlim, retval, newbrk, oldbrk;
+	struct mm_struct *mm = current->mm;
+
+	/*
+	 * Most of this replicates the code in sys_brk() except for an additional safety
+	 * check and the clearing of r8.  However, we can't call sys_brk() because we need
+	 * to acquire the mmap_sem before we can do the test...
+	 */
+	down_write(&mm->mmap_sem);
+
+	if (brk < mm->end_code)
+		goto out;
+	newbrk = PAGE_ALIGN(brk);
+	oldbrk = PAGE_ALIGN(mm->brk);
+	if (oldbrk == newbrk)
+		goto set_brk;
+
+	/* Always allow shrinking brk. */
+	if (brk <= mm->brk) {
+		if (!do_munmap(mm, newbrk, oldbrk-newbrk))
+			goto set_brk;
+		goto out;
+	}
+
+	/* Check against unimplemented/unmapped addresses: */
+	if ((newbrk - oldbrk) > RGN_MAP_LIMIT || REGION_OFFSET(newbrk) > RGN_MAP_LIMIT)
+		goto out;
+
+	/* Check against rlimit.. */
+	rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
+	if (rlim < RLIM_INFINITY && brk - mm->start_data > rlim)
+		goto out;
+
+	/* Check against existing mmap mappings. */
+	if (find_vma_intersection(mm, oldbrk, newbrk+PAGE_SIZE))
+		goto out;
+
+	/* Ok, looks good - let it rip. */
+	if (do_brk(oldbrk, newbrk-oldbrk) != oldbrk)
+		goto out;
+set_brk:
+	mm->brk = brk;
+out:
+	retval = mm->brk;
+	up_write(&mm->mmap_sem);
+	force_successful_syscall_return();
+	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 (void)
+{
+	struct pt_regs *regs = ia64_task_regs(current);
+	int fd[2];
+	int retval;
+
+	retval = do_pipe(fd);
+	if (retval)
+		goto out;
+	retval = fd[0];
+	regs->r9 = fd[1];
+  out:
+	return retval;
+}
+
+static inline unsigned long
+do_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, unsigned long pgoff)
+{
+	unsigned long roff;
+	struct file *file = NULL;
+
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	if (!(flags & MAP_ANONYMOUS)) {
+		file = fget(fd);
+		if (!file)
+			return -EBADF;
+
+		if (!file->f_op || !file->f_op->mmap) {
+			addr = -ENODEV;
+			goto out;
+		}
+	}
+
+	/*
+	 * A zero mmap always succeeds in Linux, independent of whether or not the
+	 * remaining arguments are valid.
+	 */
+	if (len == 0)
+		goto out;
+
+	/* Careful about overflows.. */
+	len = PAGE_ALIGN(len);
+	if (!len || len > TASK_SIZE) {
+		addr = -EINVAL;
+		goto out;
+	}
+
+	/*
+	 * Don't permit mappings into unmapped space, the virtual page table of a region,
+	 * or across a region boundary.  Note: RGN_MAP_LIMIT is equal to 2^n-PAGE_SIZE
+	 * (for some integer n <= 61) and len > 0.
+	 */
+	roff = REGION_OFFSET(addr);
+	if ((len > RGN_MAP_LIMIT) || (roff > (RGN_MAP_LIMIT - len))) {
+		addr = -EINVAL;
+		goto out;
+	}
+
+	down_write(&current->mm->mmap_sem);
+	addr = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+	up_write(&current->mm->mmap_sem);
+
+out:	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)
+{
+	addr = do_mmap2(addr, len, prot, flags, fd, pgoff);
+	if (!IS_ERR((void *) addr))
+		force_successful_syscall_return();
+	return addr;
+}
+
+asmlinkage unsigned long
+sys_mmap (unsigned long addr, unsigned long len, int prot, int flags, int fd, long off)
+{
+	if (offset_in_page(off) != 0)
+		return -EINVAL;
+
+	addr = do_mmap2(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
+	if (!IS_ERR((void *) addr))
+		force_successful_syscall_return();
+	return addr;
+}
+
+asmlinkage unsigned long
+ia64_mremap (unsigned long addr, unsigned long old_len, unsigned long new_len, unsigned long flags,
+	     unsigned long new_addr)
+{
+	extern unsigned long do_mremap (unsigned long addr,
+					unsigned long old_len,
+					unsigned long new_len,
+					unsigned long flags,
+					unsigned long new_addr);
+
+	down_write(&current->mm->mmap_sem);
+	{
+		addr = do_mremap(addr, old_len, new_len, flags, new_addr);
+	}
+	up_write(&current->mm->mmap_sem);
+
+	if (IS_ERR((void *) addr))
+		return addr;
+
+	force_successful_syscall_return();
+	return addr;
+}
+
+#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 */