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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "jni_internal.h"
#include "oat/runtime/oat_support_entrypoints.h"
#include "oat/runtime/stub.h"
#include "oat/utils/x86/assembler_x86.h"
#include "object.h"
#include "stack_indirect_reference_table.h"
#include "sirt_ref.h"
#define __ assembler->
namespace art {
namespace x86 {
ByteArray* X86CreateResolutionTrampoline(Runtime::TrampolineType type) {
UniquePtr<X86Assembler> assembler(static_cast<X86Assembler*>(Assembler::Create(kX86)));
#if !defined(ART_USE_LLVM_COMPILER)
// Set up the callee save frame to conform with Runtime::CreateCalleeSaveMethod(kRefsAndArgs)
// return address
__ pushl(EDI);
__ pushl(ESI);
__ pushl(EBP);
__ pushl(EBX);
__ pushl(EDX);
__ pushl(ECX);
__ pushl(EAX); // <-- callee save Method* to go here
__ movl(ECX, ESP); // save ESP
__ pushl(Immediate(type)); // pass is_static
__ fs()->pushl(Address::Absolute(Thread::SelfOffset())); // Thread*
__ pushl(ECX); // pass ESP for Method*
__ pushl(EAX); // pass Method*
// Call to resolve method.
__ Call(ThreadOffset(ENTRYPOINT_OFFSET(pUnresolvedDirectMethodTrampolineFromCode)),
X86ManagedRegister::FromCpuRegister(ECX));
__ movl(EDI, EAX); // save code pointer in EDI
__ addl(ESP, Immediate(16)); // Pop arguments
__ popl(EAX); // Restore args.
__ popl(ECX);
__ popl(EDX);
__ popl(EBX);
__ popl(EBP); // Restore callee saves.
__ popl(ESI);
// Swap EDI callee save with code pointer
__ xchgl(EDI, Address(ESP, 0));
// Tail call to intended method.
__ ret();
#else // ART_USE_LLVM_COMPILER
__ pushl(EBP);
__ movl(EBP, ESP); // save ESP
__ subl(ESP, Immediate(8)); // Align stack
__ movl(EAX, Address(EBP, 8)); // Method* called
__ leal(EDX, Address(EBP, 8)); // Method** called_addr
__ pushl(Immediate(type)); // pass is_static
__ fs()->pushl(Address::Absolute(Thread::SelfOffset())); // pass thread
__ pushl(EDX); // pass called_addr
__ pushl(EAX); // pass called
// Call to resolve method.
__ Call(ThreadOffset(ENTRYPOINT_OFFSET(pUnresolvedDirectMethodTrampolineFromCode)),
X86ManagedRegister::FromCpuRegister(ECX));
__ leave();
Label resolve_fail; // forward declaration
__ cmpl(EAX, Immediate(0));
__ j(kEqual, &resolve_fail);
__ jmp(EAX);
// Tail call to intended method.
__ Bind(&resolve_fail);
__ ret();
#endif // ART_USE_LLVM_COMPILER
assembler->EmitSlowPaths();
size_t cs = assembler->CodeSize();
SirtRef<ByteArray> resolution_trampoline(Thread::Current(), ByteArray::Alloc(cs));
CHECK(resolution_trampoline.get() != NULL);
MemoryRegion code(resolution_trampoline->GetData(), resolution_trampoline->GetLength());
assembler->FinalizeInstructions(code);
return resolution_trampoline.get();
}
typedef void (*ThrowAme)(AbstractMethod*, Thread*);
ByteArray* CreateAbstractMethodErrorStub() {
UniquePtr<X86Assembler> assembler(static_cast<X86Assembler*>(Assembler::Create(kX86)));
#if !defined(ART_USE_LLVM_COMPILER)
// Set up the callee save frame to conform with Runtime::CreateCalleeSaveMethod(kSaveAll)
// return address
__ pushl(EDI);
__ pushl(ESI);
__ pushl(EBP);
__ pushl(Immediate(0));
__ pushl(Immediate(0));
__ pushl(Immediate(0));
__ pushl(Immediate(0)); // <-- callee save Method* to go here
__ movl(ECX, ESP); // save ESP
__ pushl(Immediate(0)); // align frame
__ pushl(ECX); // pass ESP for Method*
__ fs()->pushl(Address::Absolute(Thread::SelfOffset())); // Thread*
__ pushl(EAX); // pass Method*
// Call to throw AbstractMethodError.
__ Call(ThreadOffset(ENTRYPOINT_OFFSET(pThrowAbstractMethodErrorFromCode)),
X86ManagedRegister::FromCpuRegister(ECX));
// Call never returns.
__ int3();
#else // ART_USE_LLVM_COMPILER
__ pushl(EBP);
__ movl(EBP, ESP); // save ESP
__ subl(ESP, Immediate(12)); // Align stack
__ pushl(ESP); // pass sp (not use)
__ fs()->pushl(Address::Absolute(Thread::SelfOffset())); // pass thread*
__ pushl(Address(EBP, 8)); // pass method
// Call to throw AbstractMethodError.
__ Call(ThreadOffset(ENTRYPOINT_OFFSET(pThrowAbstractMethodErrorFromCode)),
X86ManagedRegister::FromCpuRegister(ECX));
__ leave();
// Return to caller who will handle pending exception.
__ ret();
#endif // ART_USE_LLVM_COMPILER
assembler->EmitSlowPaths();
size_t cs = assembler->CodeSize();
SirtRef<ByteArray> abstract_stub(Thread::Current(),ByteArray::Alloc(cs));
CHECK(abstract_stub.get() != NULL);
MemoryRegion code(abstract_stub->GetData(), abstract_stub->GetLength());
assembler->FinalizeInstructions(code);
return abstract_stub.get();
}
ByteArray* CreateJniDlsymLookupStub() {
UniquePtr<X86Assembler> assembler(static_cast<X86Assembler*>(Assembler::Create(kX86)));
// Pad stack to ensure 16-byte alignment
__ pushl(Immediate(0));
__ pushl(Immediate(0));
__ fs()->pushl(Address::Absolute(Thread::SelfOffset())); // Thread*
__ Call(ThreadOffset(ENTRYPOINT_OFFSET(pFindNativeMethod)),
X86ManagedRegister::FromCpuRegister(ECX));
__ addl(ESP, Immediate(12));
Label no_native_code_found; // forward declaration
__ cmpl(EAX, Immediate(0));
__ j(kEqual, &no_native_code_found);
__ jmp(EAX); // Tail call into native code
__ Bind(&no_native_code_found);
__ ret(); // return to caller to handle exception
assembler->EmitSlowPaths();
size_t cs = assembler->CodeSize();
SirtRef<ByteArray> jni_stub(Thread::Current(), ByteArray::Alloc(cs));
CHECK(jni_stub.get() != NULL);
MemoryRegion code(jni_stub->GetData(), jni_stub->GetLength());
assembler->FinalizeInstructions(code);
return jni_stub.get();
}
} // namespace x86
} // namespace art
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