patch-2.4.20 linux-2.4.20/arch/x86_64/mm/modutil.c
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- Lines: 69
- Date:
Thu Nov 28 15:53:12 2002
- Orig file:
linux-2.4.19/arch/x86_64/mm/modutil.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.19/arch/x86_64/mm/modutil.c linux-2.4.20/arch/x86_64/mm/modutil.c
@@ -0,0 +1,68 @@
+/* arch/x86_64/mm/modutil.c
+ *
+ * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Based upon code written by Linus Torvalds and others.
+ *
+ * Blatantly copied from sparc64 for x86-64 by Andi Kleen.
+ * Should use direct mapping with 2MB pages. This would need extension
+ * of the kernel mapping.
+ */
+
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+static struct vm_struct * modvmlist = NULL;
+
+void module_unmap (void * addr)
+{
+ struct vm_struct **p, *tmp;
+
+ if (!addr)
+ return;
+ if ((PAGE_SIZE-1) & (unsigned long) addr) {
+ printk("Trying to unmap module with bad address (%p)\n", addr);
+ return;
+ }
+ for (p = &modvmlist ; (tmp = *p) ; p = &tmp->next) {
+ if (tmp->addr == addr) {
+ *p = tmp->next;
+ vmfree_area_pages(VMALLOC_VMADDR(tmp->addr), tmp->size);
+ kfree(tmp);
+ return;
+ }
+ }
+ printk("Trying to unmap nonexistent module vm area (%p)\n", addr);
+}
+
+void * module_map (unsigned long size)
+{
+ void * addr;
+ struct vm_struct **p, *tmp, *area;
+
+ size = PAGE_ALIGN(size);
+ if (!size || size > MODULES_LEN) return NULL;
+
+ addr = (void *) MODULES_VADDR;
+ for (p = &modvmlist; (tmp = *p) ; p = &tmp->next) {
+ if (size + (unsigned long) addr < (unsigned long) tmp->addr)
+ break;
+ addr = (void *) (tmp->size + (unsigned long) tmp->addr);
+ }
+ if ((unsigned long) addr + size >= MODULES_END) return NULL;
+
+ area = (struct vm_struct *) kmalloc(sizeof(*area), GFP_KERNEL);
+ if (!area) return NULL;
+ area->size = size + PAGE_SIZE;
+ area->addr = addr;
+ area->next = *p;
+ *p = area;
+
+ if (vmalloc_area_pages(VMALLOC_VMADDR(addr), size, GFP_KERNEL, PAGE_KERNEL)) {
+ module_unmap(addr);
+ return NULL;
+ }
+ return addr;
+}
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