contrib/llvm/tools/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.cpp

   1 //===-- RegisterInfoPOSIX_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 <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_arm64.h"
  18
  19 // Based on RegisterContextDarwin_arm64.cpp
  20 #define GPR_OFFSET(idx) ((idx)*8)
  21 #define GPR_OFFSET_NAME(reg)                                                   \
  22   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::GPR, reg))
  23
  24 #define FPU_OFFSET(idx) ((idx)*16 + sizeof(RegisterInfoPOSIX_arm64::GPR))
  25 #define FPU_OFFSET_NAME(reg)                                                   \
  26   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::FPU, reg) +                \
  27    sizeof(RegisterInfoPOSIX_arm64::GPR))
  28
  29 #define EXC_OFFSET_NAME(reg)                                                   \
  30   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::EXC, reg) +                \
  31    sizeof(RegisterInfoPOSIX_arm64::GPR) +                                      \
  32    sizeof(RegisterInfoPOSIX_arm64::FPU))
  33 #define DBG_OFFSET_NAME(reg)                                                   \
  34   (LLVM_EXTENSION offsetof(RegisterInfoPOSIX_arm64::DBG, reg) +                \
  35    sizeof(RegisterInfoPOSIX_arm64::GPR) +                                      \
  36    sizeof(RegisterInfoPOSIX_arm64::FPU) +                                      \
  37    sizeof(RegisterInfoPOSIX_arm64::EXC))
  38
  39 #define DEFINE_DBG(reg, i)                                                     \
  40   #reg, NULL,                                                                  \
  41       sizeof(((RegisterInfoPOSIX_arm64::DBG *) NULL)->reg[i]),                 \
  42               DBG_OFFSET_NAME(reg[i]), lldb::eEncodingUint, lldb::eFormatHex,  \
  43                               {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,       \
  44                                LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,       \
  45                                dbg_##reg##i },                                 \
  46                                NULL, NULL, NULL, 0
  47 #define REG_CONTEXT_SIZE                                                       \
  48   (sizeof(RegisterInfoPOSIX_arm64::GPR) +                                      \
  49    sizeof(RegisterInfoPOSIX_arm64::FPU) +                                      \
  50    sizeof(RegisterInfoPOSIX_arm64::EXC))
  51
  52 //-----------------------------------------------------------------------------
  53 // Include RegisterInfos_arm64 to declare our g_register_infos_arm64 structure.
  54 //-----------------------------------------------------------------------------
  55 #define DECLARE_REGISTER_INFOS_ARM64_STRUCT
  56 #include "RegisterInfos_arm64.h"
  57 #undef DECLARE_REGISTER_INFOS_ARM64_STRUCT
  58
  59 static const lldb_private::RegisterInfo *
  60 GetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
  61   switch (target_arch.GetMachine()) {
  62   case llvm::Triple::aarch64:
  63     return g_register_infos_arm64_le;
  64   default:
  65     assert(false && "Unhandled target architecture.");
  66     return NULL;
  67   }
  68 }
  69
  70 static uint32_t
  71 GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch) {
  72   switch (target_arch.GetMachine()) {
  73   case llvm::Triple::aarch64:
  74     return static_cast<uint32_t>(sizeof(g_register_infos_arm64_le) /
  75                                  sizeof(g_register_infos_arm64_le[0]));
  76   default:
  77     assert(false && "Unhandled target architecture.");
  78     return 0;
  79   }
  80 }
  81
  82 RegisterInfoPOSIX_arm64::RegisterInfoPOSIX_arm64(
  83     const lldb_private::ArchSpec &target_arch)
  84     : lldb_private::RegisterInfoInterface(target_arch),
  85       m_register_info_p(GetRegisterInfoPtr(target_arch)),
  86       m_register_info_count(GetRegisterInfoCount(target_arch)) {}
  87
  88 size_t RegisterInfoPOSIX_arm64::GetGPRSize() const {
  89   return sizeof(struct RegisterInfoPOSIX_arm64::GPR);
  90 }
  91
  92 const lldb_private::RegisterInfo *
  93 RegisterInfoPOSIX_arm64::GetRegisterInfo() const {
  94   return m_register_info_p;
  95 }
  96
  97 uint32_t RegisterInfoPOSIX_arm64::GetRegisterCount() const {
  98   return m_register_info_count;
  99 }