contrib/llvm-project/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.cpp

   1 //===-- RegisterInfoPOSIX_arm64.cpp ----------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===---------------------------------------------------------------------===//
   8
   9 #include <cassert>
  10 #include <stddef.h>
  11 #include <vector>
  12
  13 #include "lldb/lldb-defines.h"
  14 #include "llvm/Support/Compiler.h"
  15
  16 #include "RegisterInfoPOSIX_arm64.h"
  17
  18 // Based on RegisterContextDarwin_arm64.cpp
  19 #define GPR_OFFSET(idx) ((idx)*8)
  20 #define GPR_OFFSET_NAME(reg)                                                   \
  21   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::GPR, reg))
  22
  23 #define FPU_OFFSET(idx) ((idx)*16 + sizeof(RegisterInfoPOSIX_arm64::GPR))
  24 #define FPU_OFFSET_NAME(reg)                                                   \
  25   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::FPU, reg) +                \
  26    sizeof(RegisterInfoPOSIX_arm64::GPR))
  27
  28 #define EXC_OFFSET_NAME(reg)                                                   \
  29   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::EXC, reg) +                \
  30    sizeof(RegisterInfoPOSIX_arm64::GPR) +                                      \
  31    sizeof(RegisterInfoPOSIX_arm64::FPU))
  32 #define DBG_OFFSET_NAME(reg)                                                   \
  33   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::DBG, reg) +                \
  34    sizeof(RegisterInfoPOSIX_arm64::GPR) +                                      \
  35    sizeof(RegisterInfoPOSIX_arm64::FPU) +                                      \
  36    sizeof(RegisterInfoPOSIX_arm64::EXC))
  37
  38 #define DEFINE_DBG(reg, i)                                                     \
  39   #reg, NULL,                                                                  \
  40       sizeof(((RegisterInfoPOSIX_arm64::DBG *) NULL)->reg[i]),                 \
  41               DBG_OFFSET_NAME(reg[i]), lldb::eEncodingUint, lldb::eFormatHex,  \
  42                               {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,       \
  43                                LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,       \
  44                                dbg_##reg##i },                                 \
  45                                NULL, NULL, NULL, 0
  46 #define REG_CONTEXT_SIZE                                                       \
  47   (sizeof(RegisterInfoPOSIX_arm64::GPR) +                                      \
  48    sizeof(RegisterInfoPOSIX_arm64::FPU) +                                      \
  49    sizeof(RegisterInfoPOSIX_arm64::EXC))
  50
  51 // Include RegisterInfos_arm64 to declare our g_register_infos_arm64 structure.
  52 #define DECLARE_REGISTER_INFOS_ARM64_STRUCT
  53 #include "RegisterInfos_arm64.h"
  54 #undef DECLARE_REGISTER_INFOS_ARM64_STRUCT
  55
  56 static const lldb_private::RegisterInfo *
  57 GetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
  58   switch (target_arch.GetMachine()) {
  59   case llvm::Triple::aarch64:
  60     return g_register_infos_arm64_le;
  61   default:
  62     assert(false && "Unhandled target architecture.");
  63     return nullptr;
  64   }
  65 }
  66
  67 static uint32_t
  68 GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch) {
  69   switch (target_arch.GetMachine()) {
  70   case llvm::Triple::aarch64:
  71     return static_cast<uint32_t>(sizeof(g_register_infos_arm64_le) /
  72                                  sizeof(g_register_infos_arm64_le[0]));
  73   default:
  74     assert(false && "Unhandled target architecture.");
  75     return 0;
  76   }
  77 }
  78
  79 RegisterInfoPOSIX_arm64::RegisterInfoPOSIX_arm64(
  80     const lldb_private::ArchSpec &target_arch)
  81     : lldb_private::RegisterInfoInterface(target_arch),
  82       m_register_info_p(GetRegisterInfoPtr(target_arch)),
  83       m_register_info_count(GetRegisterInfoCount(target_arch)) {}
  84
  85 size_t RegisterInfoPOSIX_arm64::GetGPRSize() const {
  86   return sizeof(struct RegisterInfoPOSIX_arm64::GPR);
  87 }
  88
  89 const lldb_private::RegisterInfo *
  90 RegisterInfoPOSIX_arm64::GetRegisterInfo() const {
  91   return m_register_info_p;
  92 }
  93
  94 uint32_t RegisterInfoPOSIX_arm64::GetRegisterCount() const {
  95   return m_register_info_count;
  96 }