1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/*
* Copyright (C) 2012 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 <math.h>
#include <string.h>
#include "arch/arm/asm_support_arm.h"
#include "base/bit_utils.h"
#include "entrypoints/entrypoint_utils.h"
#include "entrypoints/jni/jni_entrypoints.h"
#include "entrypoints/math_entrypoints.h"
#include "entrypoints/quick/quick_alloc_entrypoints.h"
#include "entrypoints/quick/quick_default_externs.h"
#include "entrypoints/quick/quick_default_init_entrypoints.h"
#include "entrypoints/quick/quick_entrypoints.h"
#include "entrypoints/runtime_asm_entrypoints.h"
#include "interpreter/interpreter.h"
namespace art {
// Cast entrypoints.
extern "C" size_t artInstanceOfFromCode(mirror::Object* obj, mirror::Class* ref_class);
// Read barrier entrypoints.
// art_quick_read_barrier_mark_regX uses an non-standard calling
// convention: it expects its input in register X and returns its
// result in that same register, and saves and restores all
// caller-save registers.
extern "C" mirror::Object* art_quick_read_barrier_mark_reg00(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg01(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg02(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg03(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg04(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg05(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg06(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg07(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg08(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg09(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg10(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg11(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_reg12(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_introspection(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_narrow(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_arrays(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_gc_roots_wide(mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_gc_roots_narrow(
mirror::Object*);
extern "C" mirror::Object* art_quick_read_barrier_mark_introspection_intrinsic_cas(mirror::Object*);
// Used by soft float.
// Single-precision FP arithmetics.
extern "C" float fmodf(float a, float b); // REM_FLOAT[_2ADDR]
// Double-precision FP arithmetics.
extern "C" double fmod(double a, double b); // REM_DOUBLE[_2ADDR]
// Used by hard float.
extern "C" float art_quick_fmodf(float a, float b); // REM_FLOAT[_2ADDR]
extern "C" double art_quick_fmod(double a, double b); // REM_DOUBLE[_2ADDR]
// Integer arithmetics.
extern "C" int __aeabi_idivmod(int32_t, int32_t); // [DIV|REM]_INT[_2ADDR|_LIT8|_LIT16]
// Long long arithmetics - REM_LONG[_2ADDR] and DIV_LONG[_2ADDR]
extern "C" int64_t __aeabi_ldivmod(int64_t, int64_t);
void UpdateReadBarrierEntrypoints(QuickEntryPoints* qpoints, bool is_active) {
qpoints->pReadBarrierMarkReg00 = is_active ? art_quick_read_barrier_mark_reg00 : nullptr;
qpoints->pReadBarrierMarkReg01 = is_active ? art_quick_read_barrier_mark_reg01 : nullptr;
qpoints->pReadBarrierMarkReg02 = is_active ? art_quick_read_barrier_mark_reg02 : nullptr;
qpoints->pReadBarrierMarkReg03 = is_active ? art_quick_read_barrier_mark_reg03 : nullptr;
qpoints->pReadBarrierMarkReg04 = is_active ? art_quick_read_barrier_mark_reg04 : nullptr;
qpoints->pReadBarrierMarkReg05 = is_active ? art_quick_read_barrier_mark_reg05 : nullptr;
qpoints->pReadBarrierMarkReg06 = is_active ? art_quick_read_barrier_mark_reg06 : nullptr;
qpoints->pReadBarrierMarkReg07 = is_active ? art_quick_read_barrier_mark_reg07 : nullptr;
qpoints->pReadBarrierMarkReg08 = is_active ? art_quick_read_barrier_mark_reg08 : nullptr;
qpoints->pReadBarrierMarkReg09 = is_active ? art_quick_read_barrier_mark_reg09 : nullptr;
qpoints->pReadBarrierMarkReg10 = is_active ? art_quick_read_barrier_mark_reg10 : nullptr;
qpoints->pReadBarrierMarkReg11 = is_active ? art_quick_read_barrier_mark_reg11 : nullptr;
if (kUseReadBarrier && kUseBakerReadBarrier) {
// For the alignment check, strip the Thumb mode bit.
DCHECK_ALIGNED(reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection) - 1u,
256u);
// Check the field narrow entrypoint offset from the introspection entrypoint.
intptr_t narrow_diff =
reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_narrow) -
reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
DCHECK_EQ(BAKER_MARK_INTROSPECTION_FIELD_LDR_NARROW_ENTRYPOINT_OFFSET, narrow_diff);
// Check array switch cases offsets from the introspection entrypoint.
intptr_t array_diff =
reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_arrays) -
reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
DCHECK_EQ(BAKER_MARK_INTROSPECTION_ARRAY_SWITCH_OFFSET, array_diff);
// Check the GC root entrypoint offsets from the introspection entrypoint.
intptr_t gc_roots_wide_diff =
reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_gc_roots_wide) -
reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
DCHECK_EQ(BAKER_MARK_INTROSPECTION_GC_ROOT_LDR_WIDE_ENTRYPOINT_OFFSET, gc_roots_wide_diff);
intptr_t gc_roots_narrow_diff =
reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_gc_roots_narrow) -
reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
DCHECK_EQ(BAKER_MARK_INTROSPECTION_GC_ROOT_LDR_NARROW_ENTRYPOINT_OFFSET, gc_roots_narrow_diff);
intptr_t intrinsic_cas_diff =
reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection_intrinsic_cas) -
reinterpret_cast<intptr_t>(art_quick_read_barrier_mark_introspection);
DCHECK_EQ(BAKER_MARK_INTROSPECTION_INTRINSIC_CAS_ENTRYPOINT_OFFSET, intrinsic_cas_diff);
// The register 12, i.e. IP, is reserved, so there is no art_quick_read_barrier_mark_reg12.
// We're using the entry to hold a pointer to the introspection entrypoint instead.
qpoints->pReadBarrierMarkReg12 =
is_active ? art_quick_read_barrier_mark_introspection : nullptr;
}
}
void InitEntryPoints(JniEntryPoints* jpoints, QuickEntryPoints* qpoints) {
DefaultInitEntryPoints(jpoints, qpoints);
// Cast
qpoints->pInstanceofNonTrivial = artInstanceOfFromCode;
qpoints->pCheckInstanceOf = art_quick_check_instance_of;
// Math
qpoints->pIdivmod = __aeabi_idivmod;
qpoints->pLdiv = __aeabi_ldivmod;
qpoints->pLmod = __aeabi_ldivmod; // result returned in r2:r3
qpoints->pLmul = art_quick_mul_long;
qpoints->pShlLong = art_quick_shl_long;
qpoints->pShrLong = art_quick_shr_long;
qpoints->pUshrLong = art_quick_ushr_long;
qpoints->pFmod = art_quick_fmod;
qpoints->pFmodf = art_quick_fmodf;
qpoints->pD2l = art_quick_d2l;
qpoints->pF2l = art_quick_f2l;
qpoints->pL2f = art_quick_l2f;
// More math.
qpoints->pCos = cos;
qpoints->pSin = sin;
qpoints->pAcos = acos;
qpoints->pAsin = asin;
qpoints->pAtan = atan;
qpoints->pAtan2 = atan2;
qpoints->pPow = pow;
qpoints->pCbrt = cbrt;
qpoints->pCosh = cosh;
qpoints->pExp = exp;
qpoints->pExpm1 = expm1;
qpoints->pHypot = hypot;
qpoints->pLog = log;
qpoints->pLog10 = log10;
qpoints->pNextAfter = nextafter;
qpoints->pSinh = sinh;
qpoints->pTan = tan;
qpoints->pTanh = tanh;
// Intrinsics
qpoints->pIndexOf = art_quick_indexof;
// The ARM StringCompareTo intrinsic does not call the runtime.
qpoints->pStringCompareTo = nullptr;
qpoints->pMemcpy = memcpy;
// Read barrier.
qpoints->pReadBarrierJni = ReadBarrierJni;
UpdateReadBarrierEntrypoints(qpoints, /*is_active=*/ false);
qpoints->pReadBarrierMarkReg12 = nullptr; // Cannot use register 12 (IP) to pass arguments.
qpoints->pReadBarrierMarkReg13 = nullptr; // Cannot use register 13 (SP) to pass arguments.
qpoints->pReadBarrierMarkReg14 = nullptr; // Cannot use register 14 (LR) to pass arguments.
qpoints->pReadBarrierMarkReg15 = nullptr; // Cannot use register 15 (PC) to pass arguments.
// ARM has only 16 core registers.
qpoints->pReadBarrierMarkReg16 = nullptr;
qpoints->pReadBarrierMarkReg17 = nullptr;
qpoints->pReadBarrierMarkReg18 = nullptr;
qpoints->pReadBarrierMarkReg19 = nullptr;
qpoints->pReadBarrierMarkReg20 = nullptr;
qpoints->pReadBarrierMarkReg21 = nullptr;
qpoints->pReadBarrierMarkReg22 = nullptr;
qpoints->pReadBarrierMarkReg23 = nullptr;
qpoints->pReadBarrierMarkReg24 = nullptr;
qpoints->pReadBarrierMarkReg25 = nullptr;
qpoints->pReadBarrierMarkReg26 = nullptr;
qpoints->pReadBarrierMarkReg27 = nullptr;
qpoints->pReadBarrierMarkReg28 = nullptr;
qpoints->pReadBarrierMarkReg29 = nullptr;
qpoints->pReadBarrierSlow = artReadBarrierSlow;
qpoints->pReadBarrierForRootSlow = artReadBarrierForRootSlow;
}
} // namespace art
|
