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202 lines
9.7 KiB
202 lines
9.7 KiB
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <math.h>
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#include <string.h>
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#include "arch/arm/asm_support_arm.h"
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#include "base/bit_utils.h"
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#include "entrypoints/entrypoint_utils.h"
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#include "entrypoints/jni/jni_entrypoints.h"
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#include "entrypoints/math_entrypoints.h"
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#include "entrypoints/quick/quick_alloc_entrypoints.h"
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#include "entrypoints/quick/quick_default_externs.h"
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#include "entrypoints/quick/quick_default_init_entrypoints.h"
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#include "entrypoints/quick/quick_entrypoints.h"
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#include "entrypoints/runtime_asm_entrypoints.h"
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#include "interpreter/interpreter.h"
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namespace art {
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// Cast entrypoints.
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extern "C" size_t artInstanceOfFromCode(mirror::Object* obj, mirror::Class* ref_class);
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// Read barrier entrypoints.
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// art_quick_read_barrier_mark_regX uses an non-standard calling
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// convention: it expects its input in register X and returns its
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// result in that same register, and saves and restores all
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// caller-save registers.
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg00(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg01(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg02(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg03(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg04(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg05(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg06(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg07(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg08(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg09(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg10(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg11(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_reg12(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_introspection(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_narrow(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_arrays(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_gc_roots_wide(mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_gc_roots_narrow(
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mirror::Object*);
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extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_intrinsic_cas(mirror::Object*);
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// Used by soft float.
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// Single-precision FP arithmetics.
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extern "C" float fmodf(float a, float b); // REM_FLOAT[_2ADDR]
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// Double-precision FP arithmetics.
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extern "C" double fmod(double a, double b); // REM_DOUBLE[_2ADDR]
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// Used by hard float.
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extern "C" float art_quick_fmodf(float a, float b); // REM_FLOAT[_2ADDR]
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extern "C" double art_quick_fmod(double a, double b); // REM_DOUBLE[_2ADDR]
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// Integer arithmetics.
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extern "C" int __aeabi_idivmod(int32_t, int32_t); // [DIV|REM]_INT[_2ADDR|_LIT8|_LIT16]
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// Long long arithmetics - REM_LONG[_2ADDR] and DIV_LONG[_2ADDR]
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extern "C" int64_t __aeabi_ldivmod(int64_t, int64_t);
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void UpdateReadBarrierEntrypoints(QuickEntryPoints* qpoints, bool is_active) {
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qpoints->pReadBarrierMarkReg00 = is_active ? art_quick_read_barrier_mark_reg00 : nullptr;
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qpoints->pReadBarrierMarkReg01 = is_active ? art_quick_read_barrier_mark_reg01 : nullptr;
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qpoints->pReadBarrierMarkReg02 = is_active ? art_quick_read_barrier_mark_reg02 : nullptr;
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qpoints->pReadBarrierMarkReg03 = is_active ? art_quick_read_barrier_mark_reg03 : nullptr;
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qpoints->pReadBarrierMarkReg04 = is_active ? art_quick_read_barrier_mark_reg04 : nullptr;
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qpoints->pReadBarrierMarkReg05 = is_active ? art_quick_read_barrier_mark_reg05 : nullptr;
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qpoints->pReadBarrierMarkReg06 = is_active ? art_quick_read_barrier_mark_reg06 : nullptr;
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qpoints->pReadBarrierMarkReg07 = is_active ? art_quick_read_barrier_mark_reg07 : nullptr;
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qpoints->pReadBarrierMarkReg08 = is_active ? art_quick_read_barrier_mark_reg08 : nullptr;
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qpoints->pReadBarrierMarkReg09 = is_active ? art_quick_read_barrier_mark_reg09 : nullptr;
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qpoints->pReadBarrierMarkReg10 = is_active ? art_quick_read_barrier_mark_reg10 : nullptr;
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qpoints->pReadBarrierMarkReg11 = is_active ? art_quick_read_barrier_mark_reg11 : nullptr;
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if (kUseReadBarrier && kUseBakerReadBarrier) {
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// For the alignment check, strip the Thumb mode bit.
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DCHECK_ALIGNED(reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection) - 1u,
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256u);
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// Check the field narrow entrypoint offset from the introspection entrypoint.
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intptr_t narrow_diff =
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reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_narrow) -
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reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
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DCHECK_EQ(BAKER_MARK_INTROSPECTION_FIELD_LDR_NARROW_ENTRYPOINT_OFFSET, narrow_diff);
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// Check array switch cases offsets from the introspection entrypoint.
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intptr_t array_diff =
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reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_arrays) -
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reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
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DCHECK_EQ(BAKER_MARK_INTROSPECTION_ARRAY_SWITCH_OFFSET, array_diff);
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// Check the GC root entrypoint offsets from the introspection entrypoint.
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intptr_t gc_roots_wide_diff =
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reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_gc_roots_wide) -
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reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
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DCHECK_EQ(BAKER_MARK_INTROSPECTION_GC_ROOT_LDR_WIDE_ENTRYPOINT_OFFSET, gc_roots_wide_diff);
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intptr_t gc_roots_narrow_diff =
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reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_gc_roots_narrow) -
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reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
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DCHECK_EQ(BAKER_MARK_INTROSPECTION_GC_ROOT_LDR_NARROW_ENTRYPOINT_OFFSET, gc_roots_narrow_diff);
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intptr_t intrinsic_cas_diff =
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reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_intrinsic_cas) -
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reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
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DCHECK_EQ(BAKER_MARK_INTROSPECTION_INTRINSIC_CAS_ENTRYPOINT_OFFSET, intrinsic_cas_diff);
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// The register 12, i.e. IP, is reserved, so there is no art_quick_read_barrier_mark_reg12.
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// We're using the entry to hold a pointer to the introspection entrypoint instead.
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qpoints->pReadBarrierMarkReg12 =
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is_active ? art_quick_read_barrier_mark_introspection : nullptr;
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}
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}
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void InitEntryPoints(JniEntryPoints* jpoints, QuickEntryPoints* qpoints) {
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DefaultInitEntryPoints(jpoints, qpoints);
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// Cast
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qpoints->pInstanceofNonTrivial = artInstanceOfFromCode;
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qpoints->pCheckInstanceOf = art_quick_check_instance_of;
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// Math
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qpoints->pIdivmod = __aeabi_idivmod;
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qpoints->pLdiv = __aeabi_ldivmod;
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qpoints->pLmod = __aeabi_ldivmod; // result returned in r2:r3
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qpoints->pLmul = art_quick_mul_long;
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qpoints->pShlLong = art_quick_shl_long;
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qpoints->pShrLong = art_quick_shr_long;
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qpoints->pUshrLong = art_quick_ushr_long;
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qpoints->pFmod = art_quick_fmod;
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qpoints->pFmodf = art_quick_fmodf;
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qpoints->pD2l = art_quick_d2l;
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qpoints->pF2l = art_quick_f2l;
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qpoints->pL2f = art_quick_l2f;
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// More math.
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qpoints->pCos = cos;
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qpoints->pSin = sin;
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qpoints->pAcos = acos;
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qpoints->pAsin = asin;
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qpoints->pAtan = atan;
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qpoints->pAtan2 = atan2;
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qpoints->pPow = pow;
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qpoints->pCbrt = cbrt;
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qpoints->pCosh = cosh;
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qpoints->pExp = exp;
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qpoints->pExpm1 = expm1;
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qpoints->pHypot = hypot;
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qpoints->pLog = log;
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qpoints->pLog10 = log10;
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qpoints->pNextAfter = nextafter;
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qpoints->pSinh = sinh;
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qpoints->pTan = tan;
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qpoints->pTanh = tanh;
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// Intrinsics
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qpoints->pIndexOf = art_quick_indexof;
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// The ARM StringCompareTo intrinsic does not call the runtime.
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qpoints->pStringCompareTo = nullptr;
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qpoints->pMemcpy = memcpy;
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// Read barrier.
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qpoints->pReadBarrierJni = ReadBarrierJni;
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UpdateReadBarrierEntrypoints(qpoints, /*is_active=*/ false);
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qpoints->pReadBarrierMarkReg12 = nullptr; // Cannot use register 12 (IP) to pass arguments.
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qpoints->pReadBarrierMarkReg13 = nullptr; // Cannot use register 13 (SP) to pass arguments.
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qpoints->pReadBarrierMarkReg14 = nullptr; // Cannot use register 14 (LR) to pass arguments.
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qpoints->pReadBarrierMarkReg15 = nullptr; // Cannot use register 15 (PC) to pass arguments.
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// ARM has only 16 core registers.
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qpoints->pReadBarrierMarkReg16 = nullptr;
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qpoints->pReadBarrierMarkReg17 = nullptr;
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qpoints->pReadBarrierMarkReg18 = nullptr;
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qpoints->pReadBarrierMarkReg19 = nullptr;
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qpoints->pReadBarrierMarkReg20 = nullptr;
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qpoints->pReadBarrierMarkReg21 = nullptr;
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qpoints->pReadBarrierMarkReg22 = nullptr;
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qpoints->pReadBarrierMarkReg23 = nullptr;
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qpoints->pReadBarrierMarkReg24 = nullptr;
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qpoints->pReadBarrierMarkReg25 = nullptr;
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qpoints->pReadBarrierMarkReg26 = nullptr;
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qpoints->pReadBarrierMarkReg27 = nullptr;
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qpoints->pReadBarrierMarkReg28 = nullptr;
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qpoints->pReadBarrierMarkReg29 = nullptr;
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qpoints->pReadBarrierSlow = artReadBarrierSlow;
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qpoints->pReadBarrierForRootSlow = artReadBarrierForRootSlow;
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}
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} // namespace art
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