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bac82e2592
Instead of calling code object directly, call indirectly and
pass the code object in a register. The object pool is then loaded from
the code object. This is another preparation step for making generated code
relocatable.
All non-ia32 platforms:
No entry patching.
ARM:
PC marker (now code object) moves to the same place as on x64 (below saved PP, above saved FP).
R9 is now used as PP, R10 as CODE_REG.
BUG=
R=koda@google.com, rmacnak@google.com
Committed: 1d343e5a7b
Review URL: https://codereview.chromium.org//1192103004 .
65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/globals.h"
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#if defined(TARGET_ARCH_X64)
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#include "vm/debugger.h"
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#include "vm/assembler.h"
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#include "vm/code_patcher.h"
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#include "vm/cpu.h"
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#include "vm/instructions.h"
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#include "vm/stub_code.h"
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namespace dart {
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RawCode* CodeBreakpoint::OrigStubAddress() const {
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return saved_value_;
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}
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void CodeBreakpoint::PatchCode() {
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ASSERT(!is_enabled_);
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Code& stub_target = Code::Handle();
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switch (breakpoint_kind_) {
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case RawPcDescriptors::kIcCall:
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case RawPcDescriptors::kUnoptStaticCall:
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stub_target = StubCode::ICCallBreakpoint_entry()->code();
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break;
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case RawPcDescriptors::kRuntimeCall:
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stub_target = StubCode::RuntimeCallBreakpoint_entry()->code();
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break;
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default:
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UNREACHABLE();
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}
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const Code& code = Code::Handle(code_);
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saved_value_ = CodePatcher::GetStaticCallTargetAt(pc_, code);
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CodePatcher::PatchPoolPointerCallAt(pc_, code, stub_target);
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is_enabled_ = true;
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}
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void CodeBreakpoint::RestoreCode() {
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ASSERT(is_enabled_);
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const Code& code = Code::Handle(code_);
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switch (breakpoint_kind_) {
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case RawPcDescriptors::kIcCall:
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case RawPcDescriptors::kUnoptStaticCall:
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case RawPcDescriptors::kRuntimeCall: {
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CodePatcher::PatchPoolPointerCallAt(
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pc_, code, Code::Handle(saved_value_));
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break;
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}
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default:
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UNREACHABLE();
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}
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is_enabled_ = false;
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}
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} // namespace dart
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#endif // defined TARGET_ARCH_X64
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