From 86f3bec76d1bd14ed11188877dd3039d0bcfd489 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Fri, 2 Oct 2009 01:32:00 -0700
Subject: SE mode: Make the direction anonymous mmaps move through memory
 configurable.

---
 src/sim/syscall_emul.hh | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'src/sim/syscall_emul.hh')

diff --git a/src/sim/syscall_emul.hh b/src/sim/syscall_emul.hh
index c9ce4b14f..e45a6c797 100644
--- a/src/sim/syscall_emul.hh
+++ b/src/sim/syscall_emul.hh
@@ -978,9 +978,14 @@ mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
     }
 
     // pick next address from our "mmap region"
-    start = p->mmap_end;
+    if (OS::mmapGrowsDown()) {
+        start = p->mmap_end - length;
+        p->mmap_end = start;
+    } else {
+        start = p->mmap_end;
+        p->mmap_end += length;
+    }
     p->pTable->allocate(start, length);
-    p->mmap_end += length;
 
     if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
         warn("allowing mmap of file @ fd %d. "
-- 
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