source/Plugins/Process/Utility/RegisterContextLinux_arm.cpp

   1 //===-- RegisterContextLinux_arm.cpp ---------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===---------------------------------------------------------------------===//
   9
  10 #include <cassert>
  11 #include <stddef.h>
  12 #include <vector>
  13
  14 #include "lldb/lldb-defines.h"
  15 #include "llvm/Support/Compiler.h"
  16
  17 #include "RegisterContextLinux_arm.h"
  18
  19 using namespace lldb;
  20 using namespace lldb_private;
  21
  22 // Based on RegisterContextDarwin_arm.cpp
  23 #define GPR_OFFSET(idx) ((idx)*4)
  24 #define FPU_OFFSET(idx) ((idx)*4 + sizeof(RegisterContextLinux_arm::GPR))
  25 #define FPSCR_OFFSET                                                           \
  26   (LLVM_EXTENSION offsetof(RegisterContextLinux_arm::FPU, fpscr) +             \
  27    sizeof(RegisterContextLinux_arm::GPR))
  28 #define EXC_OFFSET(idx)                                                        \
  29   ((idx)*4 + sizeof(RegisterContextLinux_arm::GPR) +                           \
  30    sizeof(RegisterContextLinux_arm::FPU))
  31 #define DBG_OFFSET(reg)                                                        \
  32   ((LLVM_EXTENSION offsetof(RegisterContextLinux_arm::DBG, reg) +              \
  33     sizeof(RegisterContextLinux_arm::GPR) +                                    \
  34     sizeof(RegisterContextLinux_arm::FPU) +                                    \
  35     sizeof(RegisterContextLinux_arm::EXC)))
  36
  37 #define DEFINE_DBG(reg, i)                                                     \
  38   #reg, NULL, sizeof(((RegisterContextLinux_arm::DBG *) NULL)->reg[i]),        \
  39                       DBG_OFFSET(reg[i]), eEncodingUint, eFormatHex,           \
  40                                  {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,    \
  41                                   LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,    \
  42                                   dbg_##reg##i },                              \
  43                                   NULL, NULL, NULL, 0
  44 #define REG_CONTEXT_SIZE                                                       \
  45   (sizeof(RegisterContextLinux_arm::GPR) +                                     \
  46    sizeof(RegisterContextLinux_arm::FPU) +                                     \
  47    sizeof(RegisterContextLinux_arm::EXC))
  48
  49 //-----------------------------------------------------------------------------
  50 // Include RegisterInfos_arm to declare our g_register_infos_arm structure.
  51 //-----------------------------------------------------------------------------
  52 #define DECLARE_REGISTER_INFOS_ARM_STRUCT
  53 #include "RegisterInfos_arm.h"
  54 #undef DECLARE_REGISTER_INFOS_ARM_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::arm:
  60     return g_register_infos_arm;
  61   default:
  62     assert(false && "Unhandled target architecture.");
  63     return NULL;
  64   }
  65 }
  66
  67 static uint32_t
  68 GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch) {
  69   switch (target_arch.GetMachine()) {
  70   case llvm::Triple::arm:
  71     return static_cast<uint32_t>(sizeof(g_register_infos_arm) /
  72                                  sizeof(g_register_infos_arm[0]));
  73   default:
  74     assert(false && "Unhandled target architecture.");
  75     return 0;
  76   }
  77 }
  78
  79 RegisterContextLinux_arm::RegisterContextLinux_arm(
  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 RegisterContextLinux_arm::GetGPRSize() const {
  86   return sizeof(struct RegisterContextLinux_arm::GPR);
  87 }
  88
  89 const lldb_private::RegisterInfo *
  90 RegisterContextLinux_arm::GetRegisterInfo() const {
  91   return m_register_info_p;
  92 }
  93
  94 uint32_t RegisterContextLinux_arm::GetRegisterCount() const {
  95   return m_register_info_count;
  96 }