07c7774cd7
Remove CCallingConventionRequiresIntsAsLongs from shared code and push functionality to native wrapper. Less optimal but more flexible. Reviewed-by: jrose, kvn
53 lines
2.2 KiB
C++
53 lines
2.2 KiB
C++
/*
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* Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2014, 2015, Red Hat Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef CPU_AARCH64_VM_GLOBALDEFINITIONS_AARCH64_HPP
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#define CPU_AARCH64_VM_GLOBALDEFINITIONS_AARCH64_HPP
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const int StackAlignmentInBytes = 16;
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#define SUPPORTS_NATIVE_CX8
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// The maximum B/BL offset range on AArch64 is 128MB.
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#undef CODE_CACHE_DEFAULT_LIMIT
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#define CODE_CACHE_DEFAULT_LIMIT (128*M)
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// According to the ARMv8 ARM, "Concurrent modification and execution
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// of instructions can lead to the resulting instruction performing
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// any behavior that can be achieved by executing any sequence of
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// instructions that can be executed from the same Exception level,
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// except where the instruction before modification and the
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// instruction after modification is a B, BL, NOP, BKPT, SVC, HVC, or
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// SMC instruction."
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//
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// This makes the games we play when patching difficult, so when we
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// come across an access that needs patching we deoptimize. There are
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// ways we can avoid this, but these would slow down C1-compiled code
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// in the defauilt case. We could revisit this decision if we get any
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// evidence that it's worth doing.
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#define DEOPTIMIZE_WHEN_PATCHING
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#endif // CPU_AARCH64_VM_GLOBALDEFINITIONS_AARCH64_HPP
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