arch-arm: Add support for the brk instruction

Add support for software breakpoints as signalled by the aarch64 brk
instruction. This introduces a new SoftwareBreakpoint fault.

Change-Id: I93646c3298e09d7f7b0983108ba8937c7331297a
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Giacomo Gabrielli <giacomo.gabrielli@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/5721
Reviewed-by: Giacomo Gabrielli <Giacomo.Gabrielli@arm.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/src/arch/arm/isa/insts/misc64.isa b/src/arch/arm/isa/insts/misc64.isa
index 00724c095..dd6711e62 100644
--- a/src/arch/arm/isa/insts/misc64.isa
+++ b/src/arch/arm/isa/insts/misc64.isa
@@ -1,6 +1,6 @@
 // -*- mode:c++ -*-
 
-// Copyright (c) 2011-2013, 2016 ARM Limited
+// Copyright (c) 2011-2013, 2016-2017 ARM Limited
 // All rights reserved
 //
 // The license below extends only to copyright in the software and shall
@@ -162,4 +162,16 @@ let {{
     header_output += BasicDeclare.subst(clrexIop)
     decoder_output += BasicConstructor64.subst(clrexIop)
     exec_output += BasicExecute.subst(clrexIop)
+
+
+    brkCode = '''
+    fault = std::make_shared<SoftwareBreakpoint>(machInst,
+                                                 bits(machInst, 20, 5));
+    '''
+
+    brkIop = InstObjParams("brk", "Brk64", "ArmStaticInst",
+                           brkCode, ["IsSerializeAfter"])
+    header_output += BasicDeclare.subst(brkIop)
+    decoder_output += BasicConstructor64.subst(brkIop)
+    exec_output += BasicExecute.subst(brkIop)
 }};