1 /*
2 * Copyright (C) 2015 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 #ifndef SIMPLE_PERF_PERF_REGS_H_
18 #define SIMPLE_PERF_PERF_REGS_H_
19
20 #if defined(USE_BIONIC_UAPI_HEADERS)
21 #include <uapi/asm-x86/asm/perf_regs.h>
22 #include <uapi/asm-arm/asm/perf_regs.h>
23 #define perf_event_arm_regs perf_event_arm64_regs
24 #include <uapi/asm-arm64/asm/perf_regs.h>
25 #else
26 #include <asm-x86/asm/perf_regs.h>
27 #include <asm-arm/asm/perf_regs.h>
28 #define perf_event_arm_regs perf_event_arm64_regs
29 #include <asm-arm64/asm/perf_regs.h>
30 #endif
31
32 #include <stdint.h>
33 #include <string>
34 #include <vector>
35
36 #include "perf_event.h"
37
38 enum ArchType {
39 ARCH_X86_32,
40 ARCH_X86_64,
41 ARCH_ARM,
42 ARCH_ARM64,
43 ARCH_UNSUPPORTED,
44 };
45
GetBuildArch()46 constexpr ArchType GetBuildArch() {
47 #if defined(__i386__)
48 return ARCH_X86_32;
49 #elif defined(__x86_64__)
50 return ARCH_X86_64;
51 #elif defined(__aarch64__)
52 return ARCH_ARM64;
53 #elif defined(__arm__)
54 return ARCH_ARM;
55 #else
56 return ARCH_UNSUPPORTED;
57 #endif
58 }
59
60 ArchType GetArchType(const std::string& arch);
61 ArchType GetArchForAbi(ArchType machine_arch, int abi);
62 std::string GetArchString(ArchType arch);
63 uint64_t GetSupportedRegMask(ArchType arch);
64 std::string GetRegName(size_t regno, ArchType arch);
65
66 class ScopedCurrentArch {
67 public:
ScopedCurrentArch(ArchType arch)68 explicit ScopedCurrentArch(ArchType arch) : saved_arch(current_arch) {
69 current_arch = arch;
70 current_arch32 = GetArchForAbi(arch, PERF_SAMPLE_REGS_ABI_32);
71 }
~ScopedCurrentArch()72 ~ScopedCurrentArch() {
73 current_arch = saved_arch;
74 current_arch32 = GetArchForAbi(saved_arch, PERF_SAMPLE_REGS_ABI_32);
75 }
GetCurrentArch()76 static ArchType GetCurrentArch() {
77 return current_arch;
78 }
GetCurrentArch32()79 static ArchType GetCurrentArch32() {
80 return current_arch32;
81 }
82
83 private:
84 ArchType saved_arch;
85 static ArchType current_arch;
86 static ArchType current_arch32;
87 };
88
89 struct RegSet {
90 ArchType arch;
91 // For each setting bit in valid_mask, there is a valid reg value in data[].
92 uint64_t valid_mask;
93 // Stores reg values. Values for invalid regs are 0.
94 uint64_t data[64];
95
96 RegSet(int abi, uint64_t valid_mask, const uint64_t* valid_regs);
97
98 bool GetRegValue(size_t regno, uint64_t* value) const;
99 bool GetSpRegValue(uint64_t* value) const;
100 bool GetIpRegValue(uint64_t* value) const;
101 };
102
103 #endif // SIMPLE_PERF_PERF_REGS_H_
104