2 * Copyright (C) 2015 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #include "perf_regs.h"
19 #include <unordered_map>
20 #include <android-base/logging.h>
21 #include <android-base/stringprintf.h>
22 #include <android-base/strings.h>
24 #include "perf_event.h"
26 ArchType ScopedCurrentArch::current_arch = ARCH_UNSUPPORTED;
27 ArchType ScopedCurrentArch::current_arch32 = ARCH_UNSUPPORTED;
29 ArchType GetArchType(const std::string& arch) {
30 if (arch == "x86" || arch == "i686") {
32 } else if (arch == "x86_64") {
34 } else if (arch == "aarch64") {
36 } else if (android::base::StartsWith(arch, "arm")) {
37 // If arch is "armv8l", it is likely that we are using a 32-bit simpleperf
38 // binary on a aarch64 device. In this case, the profiling environment is
39 // ARCH_ARM64, because the kernel is aarch64.
41 int version = atoi(&arch[4]);
48 LOG(ERROR) << "unsupported arch: " << arch;
49 return ARCH_UNSUPPORTED;
52 ArchType GetArchForAbi(ArchType machine_arch, int abi) {
53 if (abi == PERF_SAMPLE_REGS_ABI_32) {
54 if (machine_arch == ARCH_X86_64) {
57 if (machine_arch == ARCH_ARM64) {
64 std::string GetArchString(ArchType arch) {
80 // If strict_check, must have arch1 == arch2.
81 // Otherwise, allow X86_32 with X86_64, ARM with ARM64.
82 bool IsArchTheSame(ArchType arch1, ArchType arch2, bool strict_check) {
84 return arch1 == arch2;
89 return arch2 == ARCH_X86_32 || arch2 == ARCH_X86_64;
92 return arch2 == ARCH_ARM64 || arch2 == ARCH_ARM;
96 return arch1 == arch2;
99 uint64_t GetSupportedRegMask(ArchType arch) {
102 return ((1ULL << PERF_REG_X86_32_MAX) - 1);
104 return (((1ULL << PERF_REG_X86_64_MAX) - 1) & ~(1ULL << PERF_REG_X86_DS) &
105 ~(1ULL << PERF_REG_X86_ES) & ~(1ULL << PERF_REG_X86_FS) & ~(1ULL << PERF_REG_X86_GS));
107 return ((1ULL << PERF_REG_ARM_MAX) - 1);
109 return ((1ULL << PERF_REG_ARM64_MAX) - 1);
116 static std::unordered_map<size_t, std::string> x86_reg_map = {
117 {PERF_REG_X86_AX, "ax"}, {PERF_REG_X86_BX, "bx"}, {PERF_REG_X86_CX, "cx"},
118 {PERF_REG_X86_DX, "dx"}, {PERF_REG_X86_SI, "si"}, {PERF_REG_X86_DI, "di"},
119 {PERF_REG_X86_BP, "bp"}, {PERF_REG_X86_SP, "sp"}, {PERF_REG_X86_IP, "ip"},
120 {PERF_REG_X86_FLAGS, "flags"}, {PERF_REG_X86_CS, "cs"}, {PERF_REG_X86_SS, "ss"},
121 {PERF_REG_X86_DS, "ds"}, {PERF_REG_X86_ES, "es"}, {PERF_REG_X86_FS, "fs"},
122 {PERF_REG_X86_GS, "gs"},
125 static std::unordered_map<size_t, std::string> arm_reg_map = {
126 {PERF_REG_ARM_FP, "fp"}, {PERF_REG_ARM_IP, "ip"}, {PERF_REG_ARM_SP, "sp"},
127 {PERF_REG_ARM_LR, "lr"}, {PERF_REG_ARM_PC, "pc"},
130 static std::unordered_map<size_t, std::string> arm64_reg_map = {
131 {PERF_REG_ARM64_LR, "lr"}, {PERF_REG_ARM64_SP, "sp"}, {PERF_REG_ARM64_PC, "pc"},
134 std::string GetRegName(size_t regno, ArchType arch) {
135 // Cast regno to int type to avoid -Werror=type-limits.
136 int reg = static_cast<int>(regno);
139 if (reg >= PERF_REG_X86_R8 && reg <= PERF_REG_X86_R15) {
140 return android::base::StringPrintf("r%d", reg - PERF_REG_X86_R8 + 8);
144 auto it = x86_reg_map.find(reg);
145 CHECK(it != x86_reg_map.end()) << "unknown reg " << reg;
149 if (reg >= PERF_REG_ARM_R0 && reg <= PERF_REG_ARM_R10) {
150 return android::base::StringPrintf("r%d", reg - PERF_REG_ARM_R0);
152 auto it = arm_reg_map.find(reg);
153 CHECK(it != arm_reg_map.end()) << "unknown reg " << reg;
157 if (reg >= PERF_REG_ARM64_X0 && reg <= PERF_REG_ARM64_X29) {
158 return android::base::StringPrintf("r%d", reg - PERF_REG_ARM64_X0);
160 auto it = arm64_reg_map.find(reg);
161 CHECK(it != arm64_reg_map.end()) << "unknown reg " << reg;
169 RegSet CreateRegSet(int abi, uint64_t valid_mask, const uint64_t* valid_regs) {
171 regs.valid_mask = valid_mask;
172 for (int i = 0, j = 0; i < 64; ++i) {
173 if ((valid_mask >> i) & 1) {
174 regs.data[i] = valid_regs[j++];
177 if (ScopedCurrentArch::GetCurrentArch() == ARCH_ARM64 &&
178 abi == PERF_SAMPLE_REGS_ABI_32) {
179 // The kernel dumps arm64 regs, but we need arm regs. So map arm64
180 // regs into arm regs.
181 regs.data[PERF_REG_ARM_PC] = regs.data[PERF_REG_ARM64_PC];
186 void SetIpReg(ArchType arch, uint64_t ip, RegSet* regs) {
191 regno = PERF_REG_X86_IP;
194 regno = PERF_REG_ARM_PC;
197 regno = PERF_REG_ARM64_PC;
202 regs->valid_mask |= (1ULL << regno);
203 regs->data[regno] = ip;
206 bool GetRegValue(const RegSet& regs, size_t regno, uint64_t* value) {
207 CHECK_LT(regno, 64U);
208 if ((regs.valid_mask >> regno) & 1) {
209 *value = regs.data[regno];
215 bool GetSpRegValue(const RegSet& regs, ArchType arch, uint64_t* value) {
219 regno = PERF_REG_X86_SP;
222 regno = PERF_REG_X86_SP;
225 regno = PERF_REG_ARM_SP;
228 regno = PERF_REG_ARM64_SP;
233 return GetRegValue(regs, regno, value);