x86: print which shared library/executable faulted in segfault etc. messages v3

[linux-2.6-omap-h63xx.git] / mm / memory.c

diff --git a/mm/memory.c b/mm/memory.c
index 673ebbf499c75860286c107bb20406d952524aad..d902d0e25edc564862605d2c8c93209602e797cc 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2754,3 +2754,34 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in
 
        return buf - old_buf;
 }
+
+/*
+ * Print the name of a VMA.
+ */
+void print_vma_addr(char *prefix, unsigned long ip)
+{
+       struct mm_struct *mm = current->mm;
+       struct vm_area_struct *vma;
+
+       down_read(&mm->mmap_sem);
+       vma = find_vma(mm, ip);
+       if (vma && vma->vm_file) {
+               struct file *f = vma->vm_file;
+               char *buf = (char *)__get_free_page(GFP_KERNEL);
+               if (buf) {
+                       char *p, *s;
+
+                       p = d_path(f->f_dentry, f->f_vfsmnt, buf, PAGE_SIZE);
+                       if (IS_ERR(p))
+                               p = "?";
+                       s = strrchr(p, '/');
+                       if (s)
+                               p = s+1;
+                       printk("%s%s[%lx+%lx]", prefix, p,
+                                       vma->vm_start,
+                                       vma->vm_end - vma->vm_start);
+                       free_page((unsigned long)buf);
+               }
+       }
+       up_read(&current->mm->mmap_sem);
+}