1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <math.h>
18 #include <string.h>
19
20 #include "arch/arm64/asm_support_arm64.h"
21 #include "base/bit_utils.h"
22 #include "entrypoints/entrypoint_utils.h"
23 #include "entrypoints/jni/jni_entrypoints.h"
24 #include "entrypoints/math_entrypoints.h"
25 #include "entrypoints/quick/quick_alloc_entrypoints.h"
26 #include "entrypoints/quick/quick_default_externs.h"
27 #include "entrypoints/quick/quick_default_init_entrypoints.h"
28 #include "entrypoints/quick/quick_entrypoints.h"
29 #include "entrypoints/runtime_asm_entrypoints.h"
30 #include "interpreter/interpreter.h"
31
32 namespace art HIDDEN {
33
34 // Cast entrypoints.
35 extern "C" size_t artInstanceOfFromCode(mirror::Object* obj, mirror::Class* ref_class);
36
37 // Read barrier entrypoints.
38 // art_quick_read_barrier_mark_regX uses an non-standard calling
39 // convention: it expects its input in register X and returns its
40 // result in that same register, and saves and restores all
41 // caller-save registers.
42 extern "C" mirror::Object* art_quick_read_barrier_mark_reg00(mirror::Object*);
43 extern "C" mirror::Object* art_quick_read_barrier_mark_reg01(mirror::Object*);
44 extern "C" mirror::Object* art_quick_read_barrier_mark_reg02(mirror::Object*);
45 extern "C" mirror::Object* art_quick_read_barrier_mark_reg03(mirror::Object*);
46 extern "C" mirror::Object* art_quick_read_barrier_mark_reg04(mirror::Object*);
47 extern "C" mirror::Object* art_quick_read_barrier_mark_reg05(mirror::Object*);
48 extern "C" mirror::Object* art_quick_read_barrier_mark_reg06(mirror::Object*);
49 extern "C" mirror::Object* art_quick_read_barrier_mark_reg07(mirror::Object*);
50 extern "C" mirror::Object* art_quick_read_barrier_mark_reg08(mirror::Object*);
51 extern "C" mirror::Object* art_quick_read_barrier_mark_reg09(mirror::Object*);
52 extern "C" mirror::Object* art_quick_read_barrier_mark_reg10(mirror::Object*);
53 extern "C" mirror::Object* art_quick_read_barrier_mark_reg11(mirror::Object*);
54 extern "C" mirror::Object* art_quick_read_barrier_mark_reg12(mirror::Object*);
55 extern "C" mirror::Object* art_quick_read_barrier_mark_reg12(mirror::Object*);
56 extern "C" mirror::Object* art_quick_read_barrier_mark_reg13(mirror::Object*);
57 extern "C" mirror::Object* art_quick_read_barrier_mark_reg14(mirror::Object*);
58 extern "C" mirror::Object* art_quick_read_barrier_mark_reg15(mirror::Object*);
59 extern "C" mirror::Object* art_quick_read_barrier_mark_reg16(mirror::Object*);
60 extern "C" mirror::Object* art_quick_read_barrier_mark_reg17(mirror::Object*);
61 extern "C" mirror::Object* art_quick_read_barrier_mark_reg18(mirror::Object*);
62 extern "C" mirror::Object* art_quick_read_barrier_mark_reg19(mirror::Object*);
63 extern "C" mirror::Object* art_quick_read_barrier_mark_reg20(mirror::Object*);
64 extern "C" mirror::Object* art_quick_read_barrier_mark_reg21(mirror::Object*);
65 extern "C" mirror::Object* art_quick_read_barrier_mark_reg22(mirror::Object*);
66 extern "C" mirror::Object* art_quick_read_barrier_mark_reg22(mirror::Object*);
67 extern "C" mirror::Object* art_quick_read_barrier_mark_reg23(mirror::Object*);
68 extern "C" mirror::Object* art_quick_read_barrier_mark_reg24(mirror::Object*);
69 extern "C" mirror::Object* art_quick_read_barrier_mark_reg25(mirror::Object*);
70 extern "C" mirror::Object* art_quick_read_barrier_mark_reg26(mirror::Object*);
71 extern "C" mirror::Object* art_quick_read_barrier_mark_reg27(mirror::Object*);
72 extern "C" mirror::Object* art_quick_read_barrier_mark_reg28(mirror::Object*);
73 extern "C" mirror::Object* art_quick_read_barrier_mark_reg29(mirror::Object*);
74
75 extern "C" mirror::Object* art_quick_read_barrier_mark_introspection(mirror::Object*);
76 extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_arrays(mirror::Object*);
77 extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_gc_roots(mirror::Object*);
78
UpdateReadBarrierEntrypoints(QuickEntryPoints * qpoints,bool is_active)79 void UpdateReadBarrierEntrypoints(QuickEntryPoints* qpoints, bool is_active) {
80 // ARM64 is the architecture with the largest number of core
81 // registers (32) that supports the read barrier configuration.
82 // Because registers 30 (LR) and 31 (SP/XZR) cannot be used to pass
83 // arguments, only define ReadBarrierMarkRegX entrypoints for the
84 // first 30 registers. This limitation is not a problem on other
85 // supported architectures (ARM, x86 and x86-64) either, as they
86 // have less core registers (resp. 16, 8 and 16).
87 // TODO: ARM/ARM64 now use introspection entrypoints. Consider
88 // reducing the number of entrypoints to those needed by x86-64.
89 qpoints->SetReadBarrierMarkReg00(is_active ? art_quick_read_barrier_mark_reg00 : nullptr);
90 qpoints->SetReadBarrierMarkReg01(is_active ? art_quick_read_barrier_mark_reg01 : nullptr);
91 qpoints->SetReadBarrierMarkReg02(is_active ? art_quick_read_barrier_mark_reg02 : nullptr);
92 qpoints->SetReadBarrierMarkReg03(is_active ? art_quick_read_barrier_mark_reg03 : nullptr);
93 qpoints->SetReadBarrierMarkReg04(is_active ? art_quick_read_barrier_mark_reg04 : nullptr);
94 qpoints->SetReadBarrierMarkReg05(is_active ? art_quick_read_barrier_mark_reg05 : nullptr);
95 qpoints->SetReadBarrierMarkReg06(is_active ? art_quick_read_barrier_mark_reg06 : nullptr);
96 qpoints->SetReadBarrierMarkReg07(is_active ? art_quick_read_barrier_mark_reg07 : nullptr);
97 qpoints->SetReadBarrierMarkReg08(is_active ? art_quick_read_barrier_mark_reg08 : nullptr);
98 qpoints->SetReadBarrierMarkReg09(is_active ? art_quick_read_barrier_mark_reg09 : nullptr);
99 qpoints->SetReadBarrierMarkReg10(is_active ? art_quick_read_barrier_mark_reg10 : nullptr);
100 qpoints->SetReadBarrierMarkReg11(is_active ? art_quick_read_barrier_mark_reg11 : nullptr);
101 qpoints->SetReadBarrierMarkReg12(is_active ? art_quick_read_barrier_mark_reg12 : nullptr);
102 qpoints->SetReadBarrierMarkReg13(is_active ? art_quick_read_barrier_mark_reg13 : nullptr);
103 qpoints->SetReadBarrierMarkReg14(is_active ? art_quick_read_barrier_mark_reg14 : nullptr);
104 qpoints->SetReadBarrierMarkReg15(is_active ? art_quick_read_barrier_mark_reg15 : nullptr);
105 qpoints->SetReadBarrierMarkReg17(is_active ? art_quick_read_barrier_mark_reg17 : nullptr);
106 qpoints->SetReadBarrierMarkReg19(is_active ? art_quick_read_barrier_mark_reg19 : nullptr);
107 qpoints->SetReadBarrierMarkReg20(is_active ? art_quick_read_barrier_mark_reg20 : nullptr);
108 qpoints->SetReadBarrierMarkReg21(is_active ? art_quick_read_barrier_mark_reg21 : nullptr);
109 qpoints->SetReadBarrierMarkReg22(is_active ? art_quick_read_barrier_mark_reg22 : nullptr);
110 qpoints->SetReadBarrierMarkReg23(is_active ? art_quick_read_barrier_mark_reg23 : nullptr);
111 qpoints->SetReadBarrierMarkReg24(is_active ? art_quick_read_barrier_mark_reg24 : nullptr);
112 qpoints->SetReadBarrierMarkReg25(is_active ? art_quick_read_barrier_mark_reg25 : nullptr);
113 qpoints->SetReadBarrierMarkReg26(is_active ? art_quick_read_barrier_mark_reg26 : nullptr);
114 qpoints->SetReadBarrierMarkReg27(is_active ? art_quick_read_barrier_mark_reg27 : nullptr);
115 qpoints->SetReadBarrierMarkReg28(is_active ? art_quick_read_barrier_mark_reg28 : nullptr);
116 qpoints->SetReadBarrierMarkReg29(is_active ? art_quick_read_barrier_mark_reg29 : nullptr);
117
118 // Check that array switch cases are at appropriate offsets from the introspection entrypoint.
119 DCHECK_ALIGNED(art_quick_read_barrier_mark_introspection, 512u);
120 intptr_t array_diff =
121 reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_arrays) -
122 reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
123 DCHECK_EQ(BAKER_MARK_INTROSPECTION_ARRAY_SWITCH_OFFSET, array_diff);
124 // Check that the GC root entrypoint is at appropriate offset from the introspection entrypoint.
125 intptr_t gc_roots_diff =
126 reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_gc_roots) -
127 reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
128 DCHECK_EQ(BAKER_MARK_INTROSPECTION_GC_ROOT_ENTRYPOINT_OFFSET, gc_roots_diff);
129 // The register 16, i.e. IP0, is reserved, so there is no art_quick_read_barrier_mark_reg16.
130 // We're using the entry to hold a pointer to the introspection entrypoint instead.
131 qpoints->SetReadBarrierMarkReg16(is_active ? art_quick_read_barrier_mark_introspection : nullptr);
132 }
133
InitEntryPoints(JniEntryPoints * jpoints,QuickEntryPoints * qpoints,bool monitor_jni_entry_exit)134 void InitEntryPoints(JniEntryPoints* jpoints,
135 QuickEntryPoints* qpoints,
136 bool monitor_jni_entry_exit) {
137 DefaultInitEntryPoints(jpoints, qpoints, monitor_jni_entry_exit);
138
139 // Cast
140 qpoints->SetInstanceofNonTrivial(artInstanceOfFromCode);
141 qpoints->SetCheckInstanceOf(art_quick_check_instance_of);
142
143 // Math
144 // TODO null entrypoints not needed for ARM64 - generate inline.
145 qpoints->SetCmpgDouble(nullptr);
146 qpoints->SetCmpgFloat(nullptr);
147 qpoints->SetCmplDouble(nullptr);
148 qpoints->SetCmplFloat(nullptr);
149 qpoints->SetFmod(fmod);
150 qpoints->SetL2d(nullptr);
151 qpoints->SetFmodf(fmodf);
152 qpoints->SetL2f(nullptr);
153 qpoints->SetD2iz(nullptr);
154 qpoints->SetF2iz(nullptr);
155 qpoints->SetIdivmod(nullptr);
156 qpoints->SetD2l(nullptr);
157 qpoints->SetF2l(nullptr);
158 qpoints->SetLdiv(nullptr);
159 qpoints->SetLmod(nullptr);
160 qpoints->SetLmul(nullptr);
161 qpoints->SetShlLong(nullptr);
162 qpoints->SetShrLong(nullptr);
163 qpoints->SetUshrLong(nullptr);
164
165 // More math.
166 qpoints->SetCos(cos);
167 qpoints->SetSin(sin);
168 qpoints->SetAcos(acos);
169 qpoints->SetAsin(asin);
170 qpoints->SetAtan(atan);
171 qpoints->SetAtan2(atan2);
172 qpoints->SetPow(pow);
173 qpoints->SetCbrt(cbrt);
174 qpoints->SetCosh(cosh);
175 qpoints->SetExp(exp);
176 qpoints->SetExpm1(expm1);
177 qpoints->SetHypot(hypot);
178 qpoints->SetLog(log);
179 qpoints->SetLog10(log10);
180 qpoints->SetNextAfter(nextafter);
181 qpoints->SetSinh(sinh);
182 qpoints->SetTan(tan);
183 qpoints->SetTanh(tanh);
184
185 // Intrinsics
186 qpoints->SetIndexOf(art_quick_indexof);
187 // The ARM64 StringCompareTo intrinsic does not call the runtime.
188 qpoints->SetStringCompareTo(nullptr);
189 qpoints->SetMemcpy(memcpy);
190
191 // Read barrier.
192 qpoints->SetReadBarrierMarkReg16(nullptr); // IP0 is used as a temp by the asm stub.
193 UpdateReadBarrierEntrypoints(qpoints, /*is_active=*/ false);
194 qpoints->SetReadBarrierSlow(artReadBarrierSlow);
195 qpoints->SetReadBarrierForRootSlow(artReadBarrierForRootSlow);
196 }
197
198 } // namespace art
199