Emit a special VDSO_COOKIE for VDSO regions instead of simply marking
them as anon.
Signed-off-by: Amitabha Roy <[email protected]>
---
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index 78c2e6e..7f879db 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -250,7 +250,14 @@ static unsigned long lookup_dcookie(stru
vma->vm_file->f_path.mnt);
*offset = (vma->vm_pgoff << PAGE_SHIFT) + addr -
vma->vm_start;
- } else {
+ }
+#ifdef CONFIG_X86_32
+ else if(mm->context.vdso==vma->vm_start){
+ cookie = VDSO_COOKIE;
+ *offset = addr;
+ }
+#endif
+ else {
/* must be an anonymous map */
*offset = addr;
}
diff --git a/drivers/oprofile/event_buffer.h b/drivers/oprofile/event_buffer.h
index 9241627..edc8ee2 100644
--- a/drivers/oprofile/event_buffer.h
+++ b/drivers/oprofile/event_buffer.h
@@ -35,6 +35,7 @@ #define CTX_TGID_CODE 7
#define TRACE_BEGIN_CODE 8
#define TRACE_END_CODE 9
+#define VDSO_COOKIE ~1UL
#define INVALID_COOKIE ~0UL
#define NO_COOKIE 0UL
-
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