contrib/llvm/tools/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm.cpp

   1 //===-- RegisterInfoPOSIX_arm.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_arm.h"
  17
  18 using namespace lldb;
  19 using namespace lldb_private;
  20
  21 // Based on RegisterContextDarwin_arm.cpp
  22 #define GPR_OFFSET(idx) ((idx)*4)
  23 #define FPU_OFFSET(idx) ((idx)*4 + sizeof(RegisterInfoPOSIX_arm::GPR))
  24 #define FPSCR_OFFSET                                                           \
  25   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm::FPU, fpscr) +                \
  26    sizeof(RegisterInfoPOSIX_arm::GPR))
  27 #define EXC_OFFSET(idx)                                                        \
  28   ((idx)*4 + sizeof(RegisterInfoPOSIX_arm::GPR) +                              \
  29    sizeof(RegisterInfoPOSIX_arm::FPU))
  30 #define DBG_OFFSET(reg)                                                        \
  31   ((LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm::DBG, reg) +                 \
  32     sizeof(RegisterInfoPOSIX_arm::GPR) + sizeof(RegisterInfoPOSIX_arm::FPU) +  \
  33     sizeof(RegisterInfoPOSIX_arm::EXC)))
  34
  35 #define DEFINE_DBG(reg, i)                                                     \
  36   #reg, NULL, sizeof(((RegisterInfoPOSIX_arm::DBG *) NULL)->reg[i]),           \
  37                       DBG_OFFSET(reg[i]), eEncodingUint, eFormatHex,           \
  38                                  {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,    \
  39                                   LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,    \
  40                                   dbg_##reg##i },                              \
  41                                   NULL, NULL, NULL, 0
  42 #define REG_CONTEXT_SIZE                                                       \
  43   (sizeof(RegisterInfoPOSIX_arm::GPR) + sizeof(RegisterInfoPOSIX_arm::FPU) +   \
  44    sizeof(RegisterInfoPOSIX_arm::EXC))
  45
  46 // Include RegisterInfos_arm to declare our g_register_infos_arm structure.
  47 #define DECLARE_REGISTER_INFOS_ARM_STRUCT
  48 #include "RegisterInfos_arm.h"
  49 #undef DECLARE_REGISTER_INFOS_ARM_STRUCT
  50
  51 static const lldb_private::RegisterInfo *
  52 GetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
  53   switch (target_arch.GetMachine()) {
  54   case llvm::Triple::arm:
  55     return g_register_infos_arm;
  56   default:
  57     assert(false && "Unhandled target architecture.");
  58     return nullptr;
  59   }
  60 }
  61
  62 static uint32_t
  63 GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch) {
  64   switch (target_arch.GetMachine()) {
  65   case llvm::Triple::arm:
  66     return static_cast<uint32_t>(sizeof(g_register_infos_arm) /
  67                                  sizeof(g_register_infos_arm[0]));
  68   default:
  69     assert(false && "Unhandled target architecture.");
  70     return 0;
  71   }
  72 }
  73
  74 RegisterInfoPOSIX_arm::RegisterInfoPOSIX_arm(
  75     const lldb_private::ArchSpec &target_arch)
  76     : lldb_private::RegisterInfoInterface(target_arch),
  77       m_register_info_p(GetRegisterInfoPtr(target_arch)),
  78       m_register_info_count(GetRegisterInfoCount(target_arch)) {}
  79
  80 size_t RegisterInfoPOSIX_arm::GetGPRSize() const {
  81   return sizeof(struct RegisterInfoPOSIX_arm::GPR);
  82 }
  83
  84 const lldb_private::RegisterInfo *
  85 RegisterInfoPOSIX_arm::GetRegisterInfo() const {
  86   return m_register_info_p;
  87 }
  88
  89 uint32_t RegisterInfoPOSIX_arm::GetRegisterCount() const {
  90   return m_register_info_count;
  91 }