arm: Add support for automatic boot loader selection

Add support for automatically selecting a boot loader that matches the
guest system's kernel. Instead of accepting a single boot loader, the
ArmSystem class now accepts a vector of boot loaders. When
initializing a system, the we now look for the first boot loader with
an architecture that matches the kernel.

This changeset makes it possible to use the same system for both
64-bit and 32-bit kernels.

1 files changed, 15 insertions, 1 deletions

diff --git a/src/arch/arm/system.hh b/src/arch/arm/system.hh
index 0b652f76c..511118d4d 100644
--- a/src/arch/arm/system.hh
+++ b/src/arch/arm/system.hh
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2012-2013 ARM Limited
+ * Copyright (c) 2010, 2012-2013, 2015 ARM Limited
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
@@ -43,6 +43,7 @@
 #ifndef __ARCH_ARM_SYSTEM_HH__
 #define __ARCH_ARM_SYSTEM_HH__
 
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -64,6 +65,9 @@ class ArmSystem : public System
      */
     Linux::DebugPrintkEvent *debugPrintkEvent;
 
+    /** Bootloaders */
+    std::vector<std::unique_ptr<ObjectFile>> bootLoaders;
+
     /**
      * Pointer to the bootloader object
      */
@@ -112,6 +116,16 @@ class ArmSystem : public System
      */
     const bool _haveLargeAsid64;
 
+  protected:
+    /**
+     * Get a boot loader that matches the kernel.
+     *
+     * @param obj Kernel binary
+     * @return Pointer to boot loader ObjectFile or nullptr if there
+     *         is no matching boot loader.
+     */
+    ObjectFile *getBootLoader(ObjectFile *const obj);
+
   public:
     typedef ArmSystemParams Params;
     const Params *