From 1f6612067123230c017acf4703dc2ea5c6634b3a Mon Sep 17 00:00:00 2001
From: Maarten ter Huurne <maarten@treewalker.org>
Date: Wed, 17 Sep 2008 08:08:22 +0000
Subject: [PATCH] 32-bit Linux fix: check result of mmap(): if it fails, it
 returns MAP_FAILED, which is not equal to 0. Also print error message
 associated with errno.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@554 8ced0084-cf51-0410-be5f-012b33b47a6e
---
 Source/Core/Common/Src/MemArena.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Source/Core/Common/Src/MemArena.cpp b/Source/Core/Common/Src/MemArena.cpp
index d2edd76703..6232d156c3 100644
--- a/Source/Core/Common/Src/MemArena.cpp
+++ b/Source/Core/Common/Src/MemArena.cpp
@@ -25,6 +25,8 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <cerrno>
+#include <cstring>
 #endif
 
 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
@@ -131,6 +133,10 @@ u8* MemArena::Find4GBBase()
 	return base;
 #else
 	void* base = mmap(0, 0x31000000, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_SHARED, 0, 0);
+	if (base == MAP_FAILED) {
+		PanicAlert("Failed to map 1 GB of memory space: %s", strerror(errno));
+		return 0;
+	}
 	munmap(base, 0x31000000);
 	return static_cast<u8*>(base);
 #endif