From 3130514bd99bdc4cf8a51e24be2d8bf6f1e47f62 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sun, 22 Apr 2018 01:55:38 +0200
Subject: exec: Leave room for mmaps etc. before PIE binaries

otherwise there might not even be enough room to run RPCs during rtld
bootstrap.

* exec/exec.c (do_exec): Add 128MiB to anywhere_start before loading
program.
---
 exec/exec.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'exec/exec.c')

diff --git a/exec/exec.c b/exec/exec.c
index ccf7bb36..3b4978d2 100644
--- a/exec/exec.c
+++ b/exec/exec.c
@@ -1285,6 +1285,9 @@ do_exec (file_t file,
     }
 
 
+  /* Leave room for mmaps etc. before PIE binaries.
+   * Could add address randomization here.  */
+  anywhere_start += 128 << 20;
   /* Load the file into the task.  */
   anywhere_start = load (newtask, &e, anywhere_start);
   if (e.error)
-- 
cgit v1.2.3