perf: Add non-exec mmap() tracking

Add the capacility to track data mmap()s. This can be used together
with PERF_SAMPLE_ADDR for data profiling.

Signed-off-by: Anton Blanchard <anton@samba.org>
[Updated code for stable perf ABI]
Signed-off-by: Eric B Munson <ebmunson@us.ibm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1274193049-25997-1-git-send-email-ebmunson@us.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/exec.c b/fs/exec.c
index e19de6a80339..97d91a03fb13 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -653,6 +653,7 @@ int setup_arg_pages(struct linux_binprm *bprm,
         else
                 stack_base = vma->vm_start - stack_expand;
 #endif
+        current->mm->start_stack = bprm->p;
         ret = expand_stack(vma, stack_base);
         if (ret)
                 ret = -EFAULT;