contrib/llvm/tools/lldb/source/Plugins/Process/Utility/RegisterContextLinux_arm64.cpp

   1 //===-- RegisterContextLinux_arm64.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 <stddef.h>
  11 #include <vector>
  12 #include <cassert>
  13
  14 #include "llvm/Support/Compiler.h"
  15 #include "lldb/lldb-defines.h"
  16
  17 #include "RegisterContextLinux_arm64.h"
  18
  19 // Based on RegisterContextDarwin_arm64.cpp
  20 #define GPR_OFFSET(idx) ((idx) * 8)
  21 #define GPR_OFFSET_NAME(reg) (LLVM_EXTENSION offsetof (RegisterContextLinux_arm64::GPR, reg))
  22
  23 #define FPU_OFFSET(idx) ((idx) * 16 + sizeof (RegisterContextLinux_arm64::GPR))
  24 #define FPU_OFFSET_NAME(reg) (LLVM_EXTENSION offsetof (RegisterContextLinux_arm64::FPU, reg) + sizeof (RegisterContextLinux_arm64::GPR))
  25
  26 #define EXC_OFFSET_NAME(reg) (LLVM_EXTENSION offsetof (RegisterContextLinux_arm64::EXC, reg) + sizeof (RegisterContextLinux_arm64::GPR) + sizeof (RegisterContextLinux_arm64::FPU))
  27 #define DBG_OFFSET_NAME(reg) (LLVM_EXTENSION offsetof (RegisterContextLinux_arm64::DBG, reg) + sizeof (RegisterContextLinux_arm64::GPR) + sizeof (RegisterContextLinux_arm64::FPU) + sizeof (RegisterContextLinux_arm64::EXC))
  28
  29 #define DEFINE_DBG(reg, i)  #reg, NULL, sizeof(((RegisterContextLinux_arm64::DBG *)NULL)->reg[i]), DBG_OFFSET_NAME(reg[i]), lldb::eEncodingUint, lldb::eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, dbg_##reg##i }, NULL, NULL
  30 #define REG_CONTEXT_SIZE (sizeof (RegisterContextLinux_arm64::GPR) + sizeof (RegisterContextLinux_arm64::FPU) + sizeof (RegisterContextLinux_arm64::EXC))
  31
  32
  33 //-----------------------------------------------------------------------------
  34 // Include RegisterInfos_arm64 to declare our g_register_infos_arm64 structure.
  35 //-----------------------------------------------------------------------------
  36 #define DECLARE_REGISTER_INFOS_ARM64_STRUCT
  37 #include "RegisterInfos_arm64.h"
  38 #undef DECLARE_REGISTER_INFOS_ARM64_STRUCT
  39
  40 static const lldb_private::RegisterInfo *
  41 GetRegisterInfoPtr (const lldb_private::ArchSpec &target_arch)
  42 {
  43     switch (target_arch.GetMachine())
  44     {
  45         case llvm::Triple::aarch64:
  46             return g_register_infos_arm64;
  47         default:
  48             assert(false && "Unhandled target architecture.");
  49             return NULL;
  50     }
  51 }
  52
  53 static uint32_t
  54 GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch)
  55 {
  56     switch (target_arch.GetMachine())
  57     {
  58         case llvm::Triple::aarch64:
  59             return static_cast<uint32_t>(sizeof(g_register_infos_arm64) / sizeof(g_register_infos_arm64[0]));
  60         default:
  61             assert(false && "Unhandled target architecture.");
  62             return 0;
  63     }
  64 }
  65
  66 RegisterContextLinux_arm64::RegisterContextLinux_arm64(const lldb_private::ArchSpec &target_arch) :
  67     lldb_private::RegisterInfoInterface(target_arch),
  68     m_register_info_p(GetRegisterInfoPtr(target_arch)),
  69     m_register_info_count(GetRegisterInfoCount(target_arch))
  70 {
  71 }
  72
  73 size_t
  74 RegisterContextLinux_arm64::GetGPRSize() const
  75 {
  76     return sizeof(struct RegisterContextLinux_arm64::GPR);
  77 }
  78
  79 const lldb_private::RegisterInfo *
  80 RegisterContextLinux_arm64::GetRegisterInfo() const
  81 {
  82     return m_register_info_p;
  83 }
  84
  85 uint32_t
  86 RegisterContextLinux_arm64::GetRegisterCount() const
  87 {
  88     return m_register_info_count;
  89 }