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
|
/*
* 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 "context_mips.h"
#include "mirror/art_method-inl.h"
#include "mirror/object-inl.h"
#include "quick/quick_method_frame_info.h"
#include "stack.h"
namespace art {
namespace mips {
static const uint32_t gZero = 0;
void MipsContext::Reset() {
for (size_t i = 0; i < kNumberOfCoreRegisters; i++) {
gprs_[i] = NULL;
}
for (size_t i = 0; i < kNumberOfFRegisters; i++) {
fprs_[i] = NULL;
}
gprs_[SP] = &sp_;
gprs_[RA] = &ra_;
// Initialize registers with easy to spot debug values.
sp_ = MipsContext::kBadGprBase + SP;
ra_ = MipsContext::kBadGprBase + RA;
}
void MipsContext::FillCalleeSaves(const StackVisitor& fr) {
mirror::ArtMethod* method = fr.GetMethod();
const QuickMethodFrameInfo frame_info = method->GetQuickFrameInfo();
size_t spill_count = POPCOUNT(frame_info.CoreSpillMask());
size_t fp_spill_count = POPCOUNT(frame_info.FpSpillMask());
if (spill_count > 0) {
// Lowest number spill is farthest away, walk registers and fill into context.
int j = 1;
for (size_t i = 0; i < kNumberOfCoreRegisters; i++) {
if (((frame_info.CoreSpillMask() >> i) & 1) != 0) {
gprs_[i] = fr.CalleeSaveAddress(spill_count - j, frame_info.FrameSizeInBytes());
j++;
}
}
}
if (fp_spill_count > 0) {
// Lowest number spill is farthest away, walk registers and fill into context.
int j = 1;
for (size_t i = 0; i < kNumberOfFRegisters; i++) {
if (((frame_info.FpSpillMask() >> i) & 1) != 0) {
fprs_[i] = fr.CalleeSaveAddress(spill_count + fp_spill_count - j,
frame_info.FrameSizeInBytes());
j++;
}
}
}
}
void MipsContext::SetGPR(uint32_t reg, uintptr_t value) {
CHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
CHECK_NE(gprs_[reg], &gZero); // Can't overwrite this static value since they are never reset.
CHECK(gprs_[reg] != NULL);
*gprs_[reg] = value;
}
void MipsContext::SmashCallerSaves() {
// This needs to be 0 because we want a null/zero return value.
gprs_[V0] = const_cast<uint32_t*>(&gZero);
gprs_[V1] = const_cast<uint32_t*>(&gZero);
gprs_[A1] = NULL;
gprs_[A2] = NULL;
gprs_[A3] = NULL;
}
extern "C" void art_quick_do_long_jump(uint32_t*, uint32_t*);
void MipsContext::DoLongJump() {
uintptr_t gprs[kNumberOfCoreRegisters];
uint32_t fprs[kNumberOfFRegisters];
for (size_t i = 0; i < kNumberOfCoreRegisters; ++i) {
gprs[i] = gprs_[i] != NULL ? *gprs_[i] : MipsContext::kBadGprBase + i;
}
for (size_t i = 0; i < kNumberOfFRegisters; ++i) {
fprs[i] = fprs_[i] != NULL ? *fprs_[i] : MipsContext::kBadGprBase + i;
}
art_quick_do_long_jump(gprs, fprs);
}
} // namespace mips
} // namespace art
|
