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      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 
     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 bool IsArchTheSame(ArchType arch1, ArchType arch2, bool strict_check);
     64 uint64_t GetSupportedRegMask(ArchType arch);
     65 std::string GetRegName(size_t regno, ArchType arch);
     66 
     67 class ScopedCurrentArch {
     68  public:
     69   explicit ScopedCurrentArch(ArchType arch) : saved_arch(current_arch) {
     70     current_arch = arch;
     71     current_arch32 = GetArchForAbi(arch, PERF_SAMPLE_REGS_ABI_32);
     72   }
     73   ~ScopedCurrentArch() {
     74     current_arch = saved_arch;
     75     current_arch32 = GetArchForAbi(saved_arch, PERF_SAMPLE_REGS_ABI_32);
     76   }
     77   static ArchType GetCurrentArch() {
     78     return current_arch;
     79   }
     80   static ArchType GetCurrentArch32() {
     81     return current_arch32;
     82   }
     83 
     84  private:
     85   ArchType saved_arch;
     86   static ArchType current_arch;
     87   static ArchType current_arch32;
     88 };
     89 
     90 struct RegSet {
     91   uint64_t valid_mask;
     92   uint64_t data[64];
     93 };
     94 
     95 RegSet CreateRegSet(int abi, uint64_t valid_mask, const uint64_t* valid_regs);
     96 
     97 bool GetRegValue(const RegSet& regs, size_t regno, uint64_t* value);
     98 bool GetSpRegValue(const RegSet& regs, ArchType arch, uint64_t* value);
     99 
    100 #endif  // SIMPLE_PERF_PERF_REGS_H_
    101