patch-2.3.46 linux/arch/sparc64/kernel/sys_sparc32.c

• Lines: 48
• Date: Mon Feb 14 15:31:14 2000
• Orig file: v2.3.45/linux/arch/sparc64/kernel/sys_sparc32.c
• Orig date: Fri Jan 28 15:09:07 2000

diff -u --recursive --new-file v2.3.45/linux/arch/sparc64/kernel/sys_sparc32.c linux/arch/sparc64/kernel/sys_sparc32.c
@@ -44,6 +44,7 @@
 #include <linux/filter.h>
 #include <linux/highmem.h>
 #include <linux/highuid.h>
+#include <linux/mman.h>
 
 #include <asm/types.h>
 #include <asm/ipc.h>
@@ -4189,4 +4190,39 @@
 	put_unused_fd(fd);
 	fd = error;
 	goto out;
+}
+
+extern unsigned long do_mremap(unsigned long addr,
+	unsigned long old_len, unsigned long new_len,
+	unsigned long flags, unsigned long new_addr);
+                
+asmlinkage unsigned long sys32_mremap(unsigned long addr,
+	unsigned long old_len, unsigned long new_len,
+	unsigned long flags, u32 __new_addr)
+{
+	unsigned long ret = -EINVAL;
+	unsigned long new_addr = AA(__new_addr);
+
+	if (old_len > 0xf0000000UL || new_len > 0xf0000000UL)
+		goto out;
+	if (addr > 0xf0000000UL - old_len)
+		goto out;
+	down(&current->mm->mmap_sem);
+	if (flags & MREMAP_FIXED) {
+		if (new_addr > 0xf0000000UL - new_len)
+			goto out_sem;
+	} else if (addr > 0xf0000000UL - new_len) {
+		ret = -ENOMEM;
+		if (!(flags & MREMAP_MAYMOVE))
+			goto out_sem;
+		new_addr = get_unmapped_area (addr, new_len);
+		if (!new_addr)
+			goto out_sem;
+		flags |= MREMAP_FIXED;
+	}
+	ret = do_mremap(addr, old_len, new_len, flags, new_addr);
+out_sem:
+	up(&current->mm->mmap_sem);
+out:
+	return ret;       
 }