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From c313f89c33217ac0e471554dace2144718f86669 Mon Sep 17 00:00:00 2001
From: Martin Jansa <Martin.Jansa@gmail.com>
Date: Thu, 13 May 2010 12:23:40 +0200
Subject: [PATCH] linux-user: use default mmap_min_addr 65536 when /proc/sys/vm/mmap_min_addr cannot be read
* 65536 is default at least for ubuntu and fedora.
---
linux-user/main.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/linux-user/main.c b/linux-user/main.c
index 18b52c0..cf2cc59 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -2728,6 +2728,7 @@
* When user has explicitly set the quest base, we skip this
* test.
*/
+#define MMAP_MIN_ADDR_DEFAULT 65536
if (!have_guest_base) {
FILE *fp;
@@ -2736,8 +2737,14 @@
if (fscanf(fp, "%lu", &tmp) == 1) {
mmap_min_addr = tmp;
qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr);
+ } else {
+ qemu_log("cannot read value from /proc/sys/vm/mmap_min_addr, assuming %d\n", MMAP_MIN_ADDR_DEFAULT);
+ mmap_min_addr = MMAP_MIN_ADDR_DEFAULT;
}
fclose(fp);
+ } else {
+ qemu_log("cannot open /proc/sys/vm/mmap_min_addr for reading, assuming %d\n", MMAP_MIN_ADDR_DEFAULT);
+ mmap_min_addr = MMAP_MIN_ADDR_DEFAULT;
}
}
#endif /* CONFIG_USE_GUEST_BASE */
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