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/*
* Copyright (C) 2015 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 "perf_regs.h"
#include <unordered_map>
#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
static ArchType current_arch = GetBuildArch();
ArchType GetCurrentArch() {
return current_arch;
}
bool SetCurrentArch(const std::string& arch) {
if (arch == "x86") {
current_arch = ARCH_X86_32;
} else if (arch == "x86_64") {
current_arch = ARCH_X86_64;
} else if (arch == "aarch64") {
current_arch = ARCH_ARM64;
} else if (android::base::StartsWith(arch, "arm")) {
current_arch = ARCH_ARM;
} else {
LOG(ERROR) << "unsupported arch: " << arch;
return false;
}
return true;
}
uint64_t GetSupportedRegMask() {
switch (GetCurrentArch()) {
case ARCH_X86_32:
return ((1ULL << PERF_REG_X86_32_MAX) - 1);
case ARCH_X86_64:
return (((1ULL << PERF_REG_X86_64_MAX) - 1) & ~(1ULL << PERF_REG_X86_DS) &
~(1ULL << PERF_REG_X86_ES) & ~(1ULL << PERF_REG_X86_FS) & ~(1ULL << PERF_REG_X86_GS));
case ARCH_ARM:
return ((1ULL << PERF_REG_ARM_MAX) - 1);
case ARCH_ARM64:
return ((1ULL << PERF_REG_ARM64_MAX) - 1);
default:
return 0;
}
return 0;
}
static std::unordered_map<size_t, std::string> x86_reg_map = {
{PERF_REG_X86_AX, "ax"}, {PERF_REG_X86_BX, "bx"}, {PERF_REG_X86_CX, "cx"},
{PERF_REG_X86_DX, "dx"}, {PERF_REG_X86_SI, "si"}, {PERF_REG_X86_DI, "di"},
{PERF_REG_X86_BP, "bp"}, {PERF_REG_X86_SP, "sp"}, {PERF_REG_X86_IP, "ip"},
{PERF_REG_X86_FLAGS, "flags"}, {PERF_REG_X86_CS, "cs"}, {PERF_REG_X86_SS, "ss"},
{PERF_REG_X86_DS, "ds"}, {PERF_REG_X86_ES, "es"}, {PERF_REG_X86_FS, "fs"},
{PERF_REG_X86_GS, "gs"},
};
static std::unordered_map<size_t, std::string> arm_reg_map = {
{PERF_REG_ARM_FP, "fp"}, {PERF_REG_ARM_IP, "ip"}, {PERF_REG_ARM_SP, "sp"},
{PERF_REG_ARM_LR, "lr"}, {PERF_REG_ARM_PC, "pc"},
};
static std::unordered_map<size_t, std::string> arm64_reg_map = {
{PERF_REG_ARM64_LR, "lr"}, {PERF_REG_ARM64_SP, "sp"}, {PERF_REG_ARM64_PC, "pc"},
};
std::string GetRegName(size_t reg) {
switch (GetCurrentArch()) {
case ARCH_X86_64: {
if (reg >= PERF_REG_X86_R8 && reg <= PERF_REG_X86_R15) {
return android::base::StringPrintf("r%zu", reg - PERF_REG_X86_R8 + 8);
}
} // go through
case ARCH_X86_32: {
auto it = x86_reg_map.find(reg);
CHECK(it != x86_reg_map.end()) << "unknown reg " << reg;
return it->second;
}
case ARCH_ARM: {
if (reg >= PERF_REG_ARM_R0 && reg <= PERF_REG_ARM_R10) {
return android::base::StringPrintf("r%zu", reg - PERF_REG_ARM_R0);
}
auto it = arm_reg_map.find(reg);
CHECK(it != arm_reg_map.end()) << "unknown reg " << reg;
return it->second;
}
case ARCH_ARM64: {
if (reg >= PERF_REG_ARM64_X0 && reg <= PERF_REG_ARM64_X29) {
return android::base::StringPrintf("r%zu", reg - PERF_REG_ARM64_X0);
}
auto it = arm64_reg_map.find(reg);
CHECK(it != arm64_reg_map.end()) << "unknown reg " << reg;
return it->second;
}
default:
return "unknown";
}
}
RegSet CreateRegSet(uint64_t valid_mask, const std::vector<uint64_t>& valid_regs) {
RegSet regs;
regs.valid_mask = valid_mask;
for (int i = 0, j = 0; i < 64; ++i) {
if ((valid_mask >> i) & 1) {
regs.data[i] = valid_regs[j++];
}
}
return regs;
}
bool GetRegValue(const RegSet& regs, size_t regno, uint64_t* value) {
CHECK_LT(regno, 64U);
if ((regs.valid_mask >> regno) & 1) {
*value = regs.data[regno];
return true;
}
return false;
}
bool GetSpRegValue(const RegSet& regs, uint64_t* value) {
size_t regno;
#if defined(__i386__)
regno = PERF_REG_X86_SP;
#elif defined(__x86_64__)
regno = PERF_REG_X86_SP;
#elif defined(__aarch64__)
regno = PERF_REG_ARM64_SP;
#elif defined(__arm__)
regno = PERF_REG_ARM_SP;
#else
return false;
#endif
return GetRegValue(regs, regno, value);
}
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