Alexandre Julliard : preloader: Make sure the WINEPRELOADRESERVE area doesn 't overlap the low memory area.

[Alexandre Julliard]

Module: wine
Branch: refs/heads/master
Commit: 875b5db17bbedaeed7044bd81494d72f43f7a545
URL:    http://source.winehq.org/git/?p=wine.git;a=commit;h=875b5db17bbedaeed7044bd8...

Author: Alexandre Julliard 
Date:   Wed Jul 19 15:06:16 2006 +0200

preloader: Make sure the WINEPRELOADRESERVE area doesn't overlap the low memory area.

---

loader/preloader.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/loader/preloader.c b/loader/preloader.c
index 274d858..d9b749c 100644
--- a/loader/preloader.c
+++ b/loader/preloader.c
@@ -847,6 +847,12 @@ static void preload_reserve( const char 
         start = end = NULL;
     }

+    /* check for overlap with low memory area */
+    if ((char *)end <= (char *)preload_info[0].addr + preload_info[0].size)
+        start = end = NULL;
+    else if ((char *)start < (char *)preload_info[0].addr + preload_info[0].size)
+        start = (char *)preload_info[0].addr + preload_info[0].size;
+
     /* entry 2 is for the PE exe */
     preload_info[2].addr = start;
     preload_info[2].size = (char *)end - (char *)start;