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

   1 //===-- RegisterInfoPOSIX_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 "RegisterInfoPOSIX_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(RegisterInfoPOSIX_arm::GPR))
  25 #define FPSCR_OFFSET                                                           \
  26   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm::FPU, fpscr) +                \
  27    sizeof(RegisterInfoPOSIX_arm::GPR))
  28 #define EXC_OFFSET(idx)                                                        \
  29   ((idx)*4 + sizeof(RegisterInfoPOSIX_arm::GPR) +                              \
  30    sizeof(RegisterInfoPOSIX_arm::FPU))
  31 #define DBG_OFFSET(reg)                                                        \
  32   ((LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm::DBG, reg) +                 \
  33     sizeof(RegisterInfoPOSIX_arm::GPR) + sizeof(RegisterInfoPOSIX_arm::FPU) +  \
  34     sizeof(RegisterInfoPOSIX_arm::EXC)))
  35
  36 #define DEFINE_DBG(reg, i)                                                     \
  37   #reg, NULL, sizeof(((RegisterInfoPOSIX_arm::DBG *) NULL)->reg[i]),           \
  38                       DBG_OFFSET(reg[i]), eEncodingUint, eFormatHex,           \
  39                                  {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,    \
  40                                   LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,    \
  41                                   dbg_##reg##i },                              \
  42                                   NULL, NULL, NULL, 0
  43 #define REG_CONTEXT_SIZE                                                       \
  44   (sizeof(RegisterInfoPOSIX_arm::GPR) + sizeof(RegisterInfoPOSIX_arm::FPU) +   \
  45    sizeof(RegisterInfoPOSIX_arm::EXC))
  46
  47 //-----------------------------------------------------------------------------
  48 // Include RegisterInfos_arm to declare our g_register_infos_arm structure.
  49 //-----------------------------------------------------------------------------
  50 #define DECLARE_REGISTER_INFOS_ARM_STRUCT
  51 #include "RegisterInfos_arm.h"
  52 #undef DECLARE_REGISTER_INFOS_ARM_STRUCT
  53
  54 static const lldb_private::RegisterInfo *
  55 GetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
  56   switch (target_arch.GetMachine()) {
  57   case llvm::Triple::arm:
  58     return g_register_infos_arm;
  59   default:
  60     assert(false && "Unhandled target architecture.");
  61     return NULL;
  62   }
  63 }
  64
  65 static uint32_t
  66 GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch) {
  67   switch (target_arch.GetMachine()) {
  68   case llvm::Triple::arm:
  69     return static_cast<uint32_t>(sizeof(g_register_infos_arm) /
  70                                  sizeof(g_register_infos_arm[0]));
  71   default:
  72     assert(false && "Unhandled target architecture.");
  73     return 0;
  74   }
  75 }
  76
  77 RegisterInfoPOSIX_arm::RegisterInfoPOSIX_arm(
  78     const lldb_private::ArchSpec &target_arch)
  79     : lldb_private::RegisterInfoInterface(target_arch),
  80       m_register_info_p(GetRegisterInfoPtr(target_arch)),
  81       m_register_info_count(GetRegisterInfoCount(target_arch)) {}
  82
  83 size_t RegisterInfoPOSIX_arm::GetGPRSize() const {
  84   return sizeof(struct RegisterInfoPOSIX_arm::GPR);
  85 }
  86
  87 const lldb_private::RegisterInfo *
  88 RegisterInfoPOSIX_arm::GetRegisterInfo() const {
  89   return m_register_info_p;
  90 }
  91
  92 uint32_t RegisterInfoPOSIX_arm::GetRegisterCount() const {
  93   return m_register_info_count;
  94 }