[PATCH] vdso: randomize the i386 vDSO by moving it into a vma

[deliverable/linux.git] / fs / proc / task_mmu.c

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 0137ec4c1368888d906d6eb543a238e5dca18236..0a163a4f7764059f7401c8b43cae42ca9c2bef43 100644 (file)
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -122,6 +122,11 @@ struct mem_size_stats
        unsigned long private_dirty;
 };
 
+__attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma)
+{
+       return NULL;
+}
+
 static int show_map_internal(struct seq_file *m, void *v, struct mem_size_stats *mss)
 {
        struct proc_maps_private *priv = m->private;
@@ -158,22 +163,23 @@ static int show_map_internal(struct seq_file *m, void *v, struct mem_size_stats
                pad_len_spaces(m, len);
                seq_path(m, file->f_vfsmnt, file->f_dentry, "\n");
        } else {
-               if (mm) {
-                       if (vma->vm_start <= mm->start_brk &&
+               const char *name = arch_vma_name(vma);
+               if (!name) {
+                       if (mm) {
+                               if (vma->vm_start <= mm->start_brk &&
                                                vma->vm_end >= mm->brk) {
-                               pad_len_spaces(m, len);
-                               seq_puts(m, "[heap]");
-                       } else {
-                               if (vma->vm_start <= mm->start_stack &&
-                                       vma->vm_end >= mm->start_stack) {
-
-                                       pad_len_spaces(m, len);
-                                       seq_puts(m, "[stack]");
+                                       name = "[heap]";
+                               } else if (vma->vm_start <= mm->start_stack &&
+                                          vma->vm_end >= mm->start_stack) {
+                                       name = "[stack]";
                                }
+                       } else {
+                               name = "[vdso]";
                        }
-               } else {
+               }
+               if (name) {
                        pad_len_spaces(m, len);
-                       seq_puts(m, "[vdso]");
+                       seq_puts(m, name);
                }
        }
        seq_putc(m, '\n');