[Lldb-commits] [lldb] 7fa7b81 - Combine multiple defs of arm64 register sets

Muhammad Omair Javaid via lldb-commits lldb-commits at lists.llvm.org
Tue Jul 7 08:25:16 PDT 2020


Author: Muhammad Omair Javaid
Date: 2020-07-07T20:25:02+05:00
New Revision: 7fa7b81bcbd040d036f9a4155486ccebc3c13be7

URL: https://github.com/llvm/llvm-project/commit/7fa7b81bcbd040d036f9a4155486ccebc3c13be7
DIFF: https://github.com/llvm/llvm-project/commit/7fa7b81bcbd040d036f9a4155486ccebc3c13be7.diff

LOG: Combine multiple defs of arm64 register sets

Summary:
This patch aims to combine similar arm64 register set definitions defined in NativeRegisterContextLinux_arm64 and RegisterContextPOSIX_arm64.
I have implemented a register set interface out of RegisterInfoInterface class and moved arm64 register sets into RegisterInfosPOSIX_arm64 which is similar to Utility/RegisterContextLinux_* implemented by various other targets. This will help in managing register sets of new ARM64 architecture features in one place.

Built and tested on x86_64-linux-gnu, aarch64-linux-gnu and arm-linux-gnueabihf targets.

Reviewers: labath

Reviewed By: labath

Subscribers: mhorne, emaste, kristof.beyls, atanasyan, danielkiss, lldb-commits

Differential Revision: https://reviews.llvm.org/D80105

Added: 
    lldb/source/Plugins/Process/Utility/RegisterInfoAndSetInterface.h

Modified: 
    lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp
    lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.cpp
    lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.h
    lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux.h
    lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
    lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.h
    lldb/source/Plugins/Process/Utility/NativeRegisterContextRegisterInfo.h
    lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.cpp
    lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.h
    lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.cpp
    lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h
    lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.cpp
    lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.h
    lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp

Removed: 
    


################################################################################
diff  --git a/lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp b/lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp
index 32c6a440db59..48dbddb86cca 100644
--- a/lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp
+++ b/lldb/source/Plugins/Process/FreeBSD/FreeBSDThread.cpp
@@ -164,7 +164,6 @@ lldb::RegisterContextSP FreeBSDThread::GetRegisterContext() {
     assert(target_arch.GetTriple().getOS() == llvm::Triple::FreeBSD);
     switch (target_arch.GetMachine()) {
     case llvm::Triple::aarch64:
-      reg_interface = new RegisterInfoPOSIX_arm64(target_arch);
       break;
     case llvm::Triple::arm:
       reg_interface = new RegisterInfoPOSIX_arm(target_arch);
@@ -193,7 +192,8 @@ lldb::RegisterContextSP FreeBSDThread::GetRegisterContext() {
     switch (target_arch.GetMachine()) {
     case llvm::Triple::aarch64: {
       RegisterContextPOSIXProcessMonitor_arm64 *reg_ctx =
-          new RegisterContextPOSIXProcessMonitor_arm64(*this, 0, reg_interface);
+          new RegisterContextPOSIXProcessMonitor_arm64(
+              *this, std::make_unique<RegisterInfoPOSIX_arm64>(target_arch));
       m_posix_thread = reg_ctx;
       m_reg_context_sp.reset(reg_ctx);
       break;

diff  --git a/lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.cpp b/lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.cpp
index 6403d98a74cb..d3eafae1e6de 100644
--- a/lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.cpp
+++ b/lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.cpp
@@ -22,9 +22,9 @@ using namespace lldb_private;
 
 RegisterContextPOSIXProcessMonitor_arm64::
     RegisterContextPOSIXProcessMonitor_arm64(
-        lldb_private::Thread &thread, uint32_t concrete_frame_idx,
-        lldb_private::RegisterInfoInterface *register_info)
-    : RegisterContextPOSIX_arm64(thread, concrete_frame_idx, register_info) {}
+        lldb_private::Thread &thread,
+        std::unique_ptr<RegisterInfoPOSIX_arm64> register_info)
+    : RegisterContextPOSIX_arm64(thread, std::move(register_info)) {}
 
 ProcessMonitor &RegisterContextPOSIXProcessMonitor_arm64::GetMonitor() {
   lldb::ProcessSP base = CalculateProcess();

diff  --git a/lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.h b/lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.h
index d54d34e89cad..f100d905e28f 100644
--- a/lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.h
+++ b/lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.h
@@ -17,8 +17,8 @@ class RegisterContextPOSIXProcessMonitor_arm64
       public POSIXBreakpointProtocol {
 public:
   RegisterContextPOSIXProcessMonitor_arm64(
-      lldb_private::Thread &thread, uint32_t concrete_frame_idx,
-      lldb_private::RegisterInfoInterface *register_info);
+      lldb_private::Thread &thread,
+      std::unique_ptr<RegisterInfoPOSIX_arm64> register_info);
 
 protected:
   bool ReadGPR();

diff  --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux.h b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux.h
index 9a89a13f5f5b..da7a762419f8 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux.h
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux.h
@@ -55,7 +55,7 @@ class NativeRegisterContextLinux : public NativeRegisterContextRegisterInfo {
 
   virtual void *GetGPRBuffer() = 0;
 
-  virtual size_t GetGPRSize() {
+  virtual size_t GetGPRSize() const {
     return GetRegisterInfoInterface().GetGPRSize();
   }
 

diff  --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
index d39044f6bdaf..beae3aef7c07 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
@@ -21,7 +21,6 @@
 #include "Plugins/Process/Linux/NativeProcessLinux.h"
 #include "Plugins/Process/Linux/Procfs.h"
 #include "Plugins/Process/POSIX/ProcessPOSIXLog.h"
-#include "Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h"
 
 // System includes - They have to be included after framework includes because
 // they define some macros which collide with variable names in other modules
@@ -37,76 +36,6 @@ using namespace lldb;
 using namespace lldb_private;
 using namespace lldb_private::process_linux;
 
-// ARM64 general purpose registers.
-static const uint32_t g_gpr_regnums_arm64[] = {
-    gpr_x0_arm64,       gpr_x1_arm64,   gpr_x2_arm64,  gpr_x3_arm64,
-    gpr_x4_arm64,       gpr_x5_arm64,   gpr_x6_arm64,  gpr_x7_arm64,
-    gpr_x8_arm64,       gpr_x9_arm64,   gpr_x10_arm64, gpr_x11_arm64,
-    gpr_x12_arm64,      gpr_x13_arm64,  gpr_x14_arm64, gpr_x15_arm64,
-    gpr_x16_arm64,      gpr_x17_arm64,  gpr_x18_arm64, gpr_x19_arm64,
-    gpr_x20_arm64,      gpr_x21_arm64,  gpr_x22_arm64, gpr_x23_arm64,
-    gpr_x24_arm64,      gpr_x25_arm64,  gpr_x26_arm64, gpr_x27_arm64,
-    gpr_x28_arm64,      gpr_fp_arm64,   gpr_lr_arm64,  gpr_sp_arm64,
-    gpr_pc_arm64,       gpr_cpsr_arm64, gpr_w0_arm64,  gpr_w1_arm64,
-    gpr_w2_arm64,       gpr_w3_arm64,   gpr_w4_arm64,  gpr_w5_arm64,
-    gpr_w6_arm64,       gpr_w7_arm64,   gpr_w8_arm64,  gpr_w9_arm64,
-    gpr_w10_arm64,      gpr_w11_arm64,  gpr_w12_arm64, gpr_w13_arm64,
-    gpr_w14_arm64,      gpr_w15_arm64,  gpr_w16_arm64, gpr_w17_arm64,
-    gpr_w18_arm64,      gpr_w19_arm64,  gpr_w20_arm64, gpr_w21_arm64,
-    gpr_w22_arm64,      gpr_w23_arm64,  gpr_w24_arm64, gpr_w25_arm64,
-    gpr_w26_arm64,      gpr_w27_arm64,  gpr_w28_arm64,
-    LLDB_INVALID_REGNUM // register sets need to end with this flag
-};
-static_assert(((sizeof g_gpr_regnums_arm64 / sizeof g_gpr_regnums_arm64[0]) -
-               1) == k_num_gpr_registers_arm64,
-              "g_gpr_regnums_arm64 has wrong number of register infos");
-
-// ARM64 floating point registers.
-static const uint32_t g_fpu_regnums_arm64[] = {
-    fpu_v0_arm64,       fpu_v1_arm64,   fpu_v2_arm64,  fpu_v3_arm64,
-    fpu_v4_arm64,       fpu_v5_arm64,   fpu_v6_arm64,  fpu_v7_arm64,
-    fpu_v8_arm64,       fpu_v9_arm64,   fpu_v10_arm64, fpu_v11_arm64,
-    fpu_v12_arm64,      fpu_v13_arm64,  fpu_v14_arm64, fpu_v15_arm64,
-    fpu_v16_arm64,      fpu_v17_arm64,  fpu_v18_arm64, fpu_v19_arm64,
-    fpu_v20_arm64,      fpu_v21_arm64,  fpu_v22_arm64, fpu_v23_arm64,
-    fpu_v24_arm64,      fpu_v25_arm64,  fpu_v26_arm64, fpu_v27_arm64,
-    fpu_v28_arm64,      fpu_v29_arm64,  fpu_v30_arm64, fpu_v31_arm64,
-    fpu_s0_arm64,       fpu_s1_arm64,   fpu_s2_arm64,  fpu_s3_arm64,
-    fpu_s4_arm64,       fpu_s5_arm64,   fpu_s6_arm64,  fpu_s7_arm64,
-    fpu_s8_arm64,       fpu_s9_arm64,   fpu_s10_arm64, fpu_s11_arm64,
-    fpu_s12_arm64,      fpu_s13_arm64,  fpu_s14_arm64, fpu_s15_arm64,
-    fpu_s16_arm64,      fpu_s17_arm64,  fpu_s18_arm64, fpu_s19_arm64,
-    fpu_s20_arm64,      fpu_s21_arm64,  fpu_s22_arm64, fpu_s23_arm64,
-    fpu_s24_arm64,      fpu_s25_arm64,  fpu_s26_arm64, fpu_s27_arm64,
-    fpu_s28_arm64,      fpu_s29_arm64,  fpu_s30_arm64, fpu_s31_arm64,
-
-    fpu_d0_arm64,       fpu_d1_arm64,   fpu_d2_arm64,  fpu_d3_arm64,
-    fpu_d4_arm64,       fpu_d5_arm64,   fpu_d6_arm64,  fpu_d7_arm64,
-    fpu_d8_arm64,       fpu_d9_arm64,   fpu_d10_arm64, fpu_d11_arm64,
-    fpu_d12_arm64,      fpu_d13_arm64,  fpu_d14_arm64, fpu_d15_arm64,
-    fpu_d16_arm64,      fpu_d17_arm64,  fpu_d18_arm64, fpu_d19_arm64,
-    fpu_d20_arm64,      fpu_d21_arm64,  fpu_d22_arm64, fpu_d23_arm64,
-    fpu_d24_arm64,      fpu_d25_arm64,  fpu_d26_arm64, fpu_d27_arm64,
-    fpu_d28_arm64,      fpu_d29_arm64,  fpu_d30_arm64, fpu_d31_arm64,
-    fpu_fpsr_arm64,     fpu_fpcr_arm64,
-    LLDB_INVALID_REGNUM // register sets need to end with this flag
-};
-static_assert(((sizeof g_fpu_regnums_arm64 / sizeof g_fpu_regnums_arm64[0]) -
-               1) == k_num_fpr_registers_arm64,
-              "g_fpu_regnums_arm64 has wrong number of register infos");
-
-namespace {
-// Number of register sets provided by this context.
-enum { k_num_register_sets = 2 };
-}
-
-// Register sets for ARM64.
-static const RegisterSet g_reg_sets_arm64[k_num_register_sets] = {
-    {"General Purpose Registers", "gpr", k_num_gpr_registers_arm64,
-     g_gpr_regnums_arm64},
-    {"Floating Point Registers", "fpu", k_num_fpr_registers_arm64,
-     g_fpu_regnums_arm64}};
-
 std::unique_ptr<NativeRegisterContextLinux>
 NativeRegisterContextLinux::CreateHostNativeRegisterContextLinux(
     const ArchSpec &target_arch, NativeThreadProtocol &native_thread) {
@@ -126,23 +55,6 @@ NativeRegisterContextLinux_arm64::NativeRegisterContextLinux_arm64(
     const ArchSpec &target_arch, NativeThreadProtocol &native_thread)
     : NativeRegisterContextLinux(native_thread,
                                  new RegisterInfoPOSIX_arm64(target_arch)) {
-  switch (target_arch.GetMachine()) {
-  case llvm::Triple::aarch64:
-    m_reg_info.num_registers = k_num_registers_arm64;
-    m_reg_info.num_gpr_registers = k_num_gpr_registers_arm64;
-    m_reg_info.num_fpr_registers = k_num_fpr_registers_arm64;
-    m_reg_info.last_gpr = k_last_gpr_arm64;
-    m_reg_info.first_fpr = k_first_fpr_arm64;
-    m_reg_info.last_fpr = k_last_fpr_arm64;
-    m_reg_info.first_fpr_v = fpu_v0_arm64;
-    m_reg_info.last_fpr_v = fpu_v31_arm64;
-    m_reg_info.gpr_flags = gpr_cpsr_arm64;
-    break;
-  default:
-    llvm_unreachable("Unhandled target architecture.");
-    break;
-  }
-
   ::memset(&m_fpr, 0, sizeof(m_fpr));
   ::memset(&m_gpr_arm64, 0, sizeof(m_gpr_arm64));
   ::memset(&m_hwp_regs, 0, sizeof(m_hwp_regs));
@@ -157,22 +69,24 @@ NativeRegisterContextLinux_arm64::NativeRegisterContextLinux_arm64(
   m_fpu_is_valid = false;
 }
 
+RegisterInfoPOSIX_arm64 &
+NativeRegisterContextLinux_arm64::GetRegisterInfo() const {
+  return static_cast<RegisterInfoPOSIX_arm64 &>(*m_register_info_interface_up);
+}
+
 uint32_t NativeRegisterContextLinux_arm64::GetRegisterSetCount() const {
-  return k_num_register_sets;
+  return GetRegisterInfo().GetRegisterSetCount();
 }
 
 const RegisterSet *
 NativeRegisterContextLinux_arm64::GetRegisterSet(uint32_t set_index) const {
-  if (set_index < k_num_register_sets)
-    return &g_reg_sets_arm64[set_index];
-
-  return nullptr;
+  return GetRegisterInfo().GetRegisterSet(set_index);
 }
 
 uint32_t NativeRegisterContextLinux_arm64::GetUserRegisterCount() const {
   uint32_t count = 0;
-  for (uint32_t set_index = 0; set_index < k_num_register_sets; ++set_index)
-    count += g_reg_sets_arm64[set_index].num_registers;
+  for (uint32_t set_index = 0; set_index < GetRegisterSetCount(); ++set_index)
+    count += GetRegisterSet(set_index)->num_registers;
   return count;
 }
 
@@ -344,11 +258,17 @@ Status NativeRegisterContextLinux_arm64::WriteAllRegisterValues(
 }
 
 bool NativeRegisterContextLinux_arm64::IsGPR(unsigned reg) const {
-  return reg <= m_reg_info.last_gpr; // GPR's come first.
+  if (GetRegisterInfo().GetRegisterSetFromRegisterIndex(reg) ==
+      RegisterInfoPOSIX_arm64::GPRegSet)
+    return true;
+  return false;
 }
 
 bool NativeRegisterContextLinux_arm64::IsFPR(unsigned reg) const {
-  return (m_reg_info.first_fpr <= reg && reg <= m_reg_info.last_fpr);
+  if (GetRegisterInfo().GetRegisterSetFromRegisterIndex(reg) ==
+      RegisterInfoPOSIX_arm64::FPRegSet)
+    return true;
+  return false;
 }
 
 uint32_t NativeRegisterContextLinux_arm64::NumSupportedHardwareBreakpoints() {
@@ -900,8 +820,7 @@ void NativeRegisterContextLinux_arm64::InvalidateAllRegisters() {
 
 uint32_t NativeRegisterContextLinux_arm64::CalculateFprOffset(
     const RegisterInfo *reg_info) const {
-  return reg_info->byte_offset -
-         GetRegisterInfoAtIndex(m_reg_info.first_fpr)->byte_offset;
+  return reg_info->byte_offset - GetGPRSize();
 }
 
 #endif // defined (__arm64__) || defined (__aarch64__)

diff  --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.h b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.h
index f7c501a9fdf6..0fbbea51d217 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.h
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.h
@@ -12,7 +12,7 @@
 #define lldb_NativeRegisterContextLinux_arm64_h
 
 #include "Plugins/Process/Linux/NativeRegisterContextLinux.h"
-#include "Plugins/Process/Utility/lldb-arm64-register-enums.h"
+#include "Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h"
 
 namespace lldb_private {
 namespace process_linux {
@@ -95,47 +95,13 @@ class NativeRegisterContextLinux_arm64 : public NativeRegisterContextLinux {
   size_t GetFPRSize() override { return sizeof(m_fpr); }
 
 private:
-  struct RegInfo {
-    uint32_t num_registers;
-    uint32_t num_gpr_registers;
-    uint32_t num_fpr_registers;
-
-    uint32_t last_gpr;
-    uint32_t first_fpr;
-    uint32_t last_fpr;
-
-    uint32_t first_fpr_v;
-    uint32_t last_fpr_v;
-
-    uint32_t gpr_flags;
-  };
-
-  // based on RegisterContextDarwin_arm64.h
-  struct VReg {
-    uint8_t bytes[16];
-  };
-
-  // based on RegisterContextDarwin_arm64.h
-  struct FPU {
-    VReg v[32];
-    uint32_t fpsr;
-    uint32_t fpcr;
-  };
-
-  struct GPR {
-    uint64_t x[31];
-    uint64_t sp;
-    uint64_t pc;
-    uint64_t pstate;
-  };
-
   bool m_gpr_is_valid;
   bool m_fpu_is_valid;
 
-  GPR m_gpr_arm64; // 64-bit general purpose registers.
-  RegInfo m_reg_info;
-  FPU m_fpr; // floating-point registers including extended register sets.
+  RegisterInfoPOSIX_arm64::GPR m_gpr_arm64; // 64-bit general purpose registers.
 
+  RegisterInfoPOSIX_arm64::FPU
+      m_fpr; // floating-point registers including extended register sets.
   // Debug register info for hardware breakpoints and watchpoints management.
   struct DREG {
     lldb::addr_t address;  // Breakpoint/watchpoint address value.
@@ -162,6 +128,8 @@ class NativeRegisterContextLinux_arm64 : public NativeRegisterContextLinux {
   Status WriteHardwareDebugRegs(int hwbType);
 
   uint32_t CalculateFprOffset(const RegisterInfo *reg_info) const;
+
+  RegisterInfoPOSIX_arm64 &GetRegisterInfo() const;
 };
 
 } // namespace process_linux

diff  --git a/lldb/source/Plugins/Process/Utility/NativeRegisterContextRegisterInfo.h b/lldb/source/Plugins/Process/Utility/NativeRegisterContextRegisterInfo.h
index ae87130cd9de..0e96841fd909 100644
--- a/lldb/source/Plugins/Process/Utility/NativeRegisterContextRegisterInfo.h
+++ b/lldb/source/Plugins/Process/Utility/NativeRegisterContextRegisterInfo.h
@@ -33,7 +33,7 @@ class NativeRegisterContextRegisterInfo : public NativeRegisterContext {
 
   const RegisterInfoInterface &GetRegisterInfoInterface() const;
 
-private:
+protected:
   std::unique_ptr<RegisterInfoInterface> m_register_info_interface_up;
 };
 }

diff  --git a/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.cpp b/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.cpp
index 63f22620beda..8ef587f13e3a 100644
--- a/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.cpp
+++ b/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.cpp
@@ -25,105 +25,25 @@
 using namespace lldb;
 using namespace lldb_private;
 
-// ARM64 general purpose registers.
-const uint32_t g_gpr_regnums_arm64[] = {
-    gpr_x0_arm64,       gpr_x1_arm64,   gpr_x2_arm64,  gpr_x3_arm64,
-    gpr_x4_arm64,       gpr_x5_arm64,   gpr_x6_arm64,  gpr_x7_arm64,
-    gpr_x8_arm64,       gpr_x9_arm64,   gpr_x10_arm64, gpr_x11_arm64,
-    gpr_x12_arm64,      gpr_x13_arm64,  gpr_x14_arm64, gpr_x15_arm64,
-    gpr_x16_arm64,      gpr_x17_arm64,  gpr_x18_arm64, gpr_x19_arm64,
-    gpr_x20_arm64,      gpr_x21_arm64,  gpr_x22_arm64, gpr_x23_arm64,
-    gpr_x24_arm64,      gpr_x25_arm64,  gpr_x26_arm64, gpr_x27_arm64,
-    gpr_x28_arm64,      gpr_fp_arm64,   gpr_lr_arm64,  gpr_sp_arm64,
-    gpr_pc_arm64,       gpr_cpsr_arm64, gpr_w0_arm64,  gpr_w1_arm64,
-    gpr_w2_arm64,       gpr_w3_arm64,   gpr_w4_arm64,  gpr_w5_arm64,
-    gpr_w6_arm64,       gpr_w7_arm64,   gpr_w8_arm64,  gpr_w9_arm64,
-    gpr_w10_arm64,      gpr_w11_arm64,  gpr_w12_arm64, gpr_w13_arm64,
-    gpr_w14_arm64,      gpr_w15_arm64,  gpr_w16_arm64, gpr_w17_arm64,
-    gpr_w18_arm64,      gpr_w19_arm64,  gpr_w20_arm64, gpr_w21_arm64,
-    gpr_w22_arm64,      gpr_w23_arm64,  gpr_w24_arm64, gpr_w25_arm64,
-    gpr_w26_arm64,      gpr_w27_arm64,  gpr_w28_arm64,
-    LLDB_INVALID_REGNUM // register sets need to end with this flag
-};
-static_assert(((sizeof g_gpr_regnums_arm64 / sizeof g_gpr_regnums_arm64[0]) -
-               1) == k_num_gpr_registers_arm64,
-              "g_gpr_regnums_arm64 has wrong number of register infos");
-
-// ARM64 floating point registers.
-static const uint32_t g_fpu_regnums_arm64[] = {
-    fpu_v0_arm64,       fpu_v1_arm64,   fpu_v2_arm64,  fpu_v3_arm64,
-    fpu_v4_arm64,       fpu_v5_arm64,   fpu_v6_arm64,  fpu_v7_arm64,
-    fpu_v8_arm64,       fpu_v9_arm64,   fpu_v10_arm64, fpu_v11_arm64,
-    fpu_v12_arm64,      fpu_v13_arm64,  fpu_v14_arm64, fpu_v15_arm64,
-    fpu_v16_arm64,      fpu_v17_arm64,  fpu_v18_arm64, fpu_v19_arm64,
-    fpu_v20_arm64,      fpu_v21_arm64,  fpu_v22_arm64, fpu_v23_arm64,
-    fpu_v24_arm64,      fpu_v25_arm64,  fpu_v26_arm64, fpu_v27_arm64,
-    fpu_v28_arm64,      fpu_v29_arm64,  fpu_v30_arm64, fpu_v31_arm64,
-    fpu_s0_arm64,       fpu_s1_arm64,   fpu_s2_arm64,  fpu_s3_arm64,
-    fpu_s4_arm64,       fpu_s5_arm64,   fpu_s6_arm64,  fpu_s7_arm64,
-    fpu_s8_arm64,       fpu_s9_arm64,   fpu_s10_arm64, fpu_s11_arm64,
-    fpu_s12_arm64,      fpu_s13_arm64,  fpu_s14_arm64, fpu_s15_arm64,
-    fpu_s16_arm64,      fpu_s17_arm64,  fpu_s18_arm64, fpu_s19_arm64,
-    fpu_s20_arm64,      fpu_s21_arm64,  fpu_s22_arm64, fpu_s23_arm64,
-    fpu_s24_arm64,      fpu_s25_arm64,  fpu_s26_arm64, fpu_s27_arm64,
-    fpu_s28_arm64,      fpu_s29_arm64,  fpu_s30_arm64, fpu_s31_arm64,
-
-    fpu_d0_arm64,       fpu_d1_arm64,   fpu_d2_arm64,  fpu_d3_arm64,
-    fpu_d4_arm64,       fpu_d5_arm64,   fpu_d6_arm64,  fpu_d7_arm64,
-    fpu_d8_arm64,       fpu_d9_arm64,   fpu_d10_arm64, fpu_d11_arm64,
-    fpu_d12_arm64,      fpu_d13_arm64,  fpu_d14_arm64, fpu_d15_arm64,
-    fpu_d16_arm64,      fpu_d17_arm64,  fpu_d18_arm64, fpu_d19_arm64,
-    fpu_d20_arm64,      fpu_d21_arm64,  fpu_d22_arm64, fpu_d23_arm64,
-    fpu_d24_arm64,      fpu_d25_arm64,  fpu_d26_arm64, fpu_d27_arm64,
-    fpu_d28_arm64,      fpu_d29_arm64,  fpu_d30_arm64, fpu_d31_arm64,
-    fpu_fpsr_arm64,     fpu_fpcr_arm64,
-    LLDB_INVALID_REGNUM // register sets need to end with this flag
-};
-static_assert(((sizeof g_fpu_regnums_arm64 / sizeof g_fpu_regnums_arm64[0]) -
-               1) == k_num_fpr_registers_arm64,
-              "g_fpu_regnums_arm64 has wrong number of register infos");
-
-// Number of register sets provided by this context.
-enum { k_num_register_sets = 2 };
-
-// Register sets for ARM64.
-static const lldb_private::RegisterSet g_reg_sets_arm64[k_num_register_sets] = {
-    {"General Purpose Registers", "gpr", k_num_gpr_registers_arm64,
-     g_gpr_regnums_arm64},
-    {"Floating Point Registers", "fpu", k_num_fpr_registers_arm64,
-     g_fpu_regnums_arm64}};
-
 bool RegisterContextPOSIX_arm64::IsGPR(unsigned reg) {
-  return reg <= m_reg_info.last_gpr; // GPR's come first.
+  if (m_register_info_up->GetRegisterSetFromRegisterIndex(reg) ==
+      RegisterInfoPOSIX_arm64::GPRegSet)
+    return true;
+  return false;
 }
 
 bool RegisterContextPOSIX_arm64::IsFPR(unsigned reg) {
-  return (m_reg_info.first_fpr <= reg && reg <= m_reg_info.last_fpr);
+  if (m_register_info_up->GetRegisterSetFromRegisterIndex(reg) ==
+      RegisterInfoPOSIX_arm64::FPRegSet)
+    return true;
+  return false;
 }
 
 RegisterContextPOSIX_arm64::RegisterContextPOSIX_arm64(
-    lldb_private::Thread &thread, uint32_t concrete_frame_idx,
-    lldb_private::RegisterInfoInterface *register_info)
-    : lldb_private::RegisterContext(thread, concrete_frame_idx) {
-  m_register_info_up.reset(register_info);
-
-  switch (register_info->m_target_arch.GetMachine()) {
-  case llvm::Triple::aarch64:
-  case llvm::Triple::aarch64_32:
-    m_reg_info.num_registers = k_num_registers_arm64;
-    m_reg_info.num_gpr_registers = k_num_gpr_registers_arm64;
-    m_reg_info.num_fpr_registers = k_num_fpr_registers_arm64;
-    m_reg_info.last_gpr = k_last_gpr_arm64;
-    m_reg_info.first_fpr = k_first_fpr_arm64;
-    m_reg_info.last_fpr = k_last_fpr_arm64;
-    m_reg_info.first_fpr_v = fpu_v0_arm64;
-    m_reg_info.last_fpr_v = fpu_v31_arm64;
-    m_reg_info.gpr_flags = gpr_cpsr_arm64;
-    break;
-  default:
-    assert(false && "Unhandled target architecture.");
-    break;
-  }
+    lldb_private::Thread &thread,
+    std::unique_ptr<RegisterInfoPOSIX_arm64> register_info)
+    : lldb_private::RegisterContext(thread, 0),
+      m_register_info_up(std::move(register_info)) {
 
   ::memset(&m_fpr, 0, sizeof m_fpr);
 }
@@ -135,19 +55,15 @@ void RegisterContextPOSIX_arm64::Invalidate() {}
 void RegisterContextPOSIX_arm64::InvalidateAllRegisters() {}
 
 unsigned RegisterContextPOSIX_arm64::GetRegisterOffset(unsigned reg) {
-  assert(reg < m_reg_info.num_registers && "Invalid register number.");
-  return GetRegisterInfo()[reg].byte_offset;
+  return m_register_info_up->GetRegisterInfo()[reg].byte_offset;
 }
 
 unsigned RegisterContextPOSIX_arm64::GetRegisterSize(unsigned reg) {
-  assert(reg < m_reg_info.num_registers && "Invalid register number.");
-  return GetRegisterInfo()[reg].byte_size;
+  return m_register_info_up->GetRegisterInfo()[reg].byte_size;
 }
 
 size_t RegisterContextPOSIX_arm64::GetRegisterCount() {
-  size_t num_registers =
-      m_reg_info.num_gpr_registers + m_reg_info.num_fpr_registers;
-  return num_registers;
+  return m_register_info_up->GetRegisterCount();
 }
 
 size_t RegisterContextPOSIX_arm64::GetGPRSize() {
@@ -164,42 +80,23 @@ RegisterContextPOSIX_arm64::GetRegisterInfo() {
 
 const lldb_private::RegisterInfo *
 RegisterContextPOSIX_arm64::GetRegisterInfoAtIndex(size_t reg) {
-  if (reg < m_reg_info.num_registers)
+  if (reg < GetRegisterCount())
     return &GetRegisterInfo()[reg];
   else
     return nullptr;
 }
 
 size_t RegisterContextPOSIX_arm64::GetRegisterSetCount() {
-  size_t sets = 0;
-  for (size_t set = 0; set < k_num_register_sets; ++set) {
-    if (IsRegisterSetAvailable(set))
-      ++sets;
-  }
-
-  return sets;
-}
-
-bool RegisterContextPOSIX_arm64::IsRegisterSetAvailable(size_t set_index) {
-  return set_index < k_num_register_sets;
+  return m_register_info_up->GetRegisterSetCount();
 }
 
 const lldb_private::RegisterSet *
 RegisterContextPOSIX_arm64::GetRegisterSet(size_t set) {
-  if (IsRegisterSetAvailable(set)) {
-    switch (m_register_info_up->m_target_arch.GetMachine()) {
-    case llvm::Triple::aarch64:
-    case llvm::Triple::aarch64_32:
-      return &g_reg_sets_arm64[set];
-    default:
-      assert(false && "Unhandled target architecture.");
-      return nullptr;
-    }
-  }
-  return nullptr;
+  return m_register_info_up->GetRegisterSet(set);
 }
 
 const char *RegisterContextPOSIX_arm64::GetRegisterName(unsigned reg) {
-  assert(reg < m_reg_info.num_registers && "Invalid register offset.");
-  return GetRegisterInfo()[reg].name;
+  if (reg < GetRegisterCount())
+    return GetRegisterInfo()[reg].name;
+  return nullptr;
 }

diff  --git a/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.h b/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.h
index 5b084c9253b4..c2d5aee7f73c 100644
--- a/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.h
+++ b/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_arm64.h
@@ -10,6 +10,7 @@
 #define LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_REGISTERCONTEXTPOSIX_ARM64_H
 
 #include "RegisterInfoInterface.h"
+#include "RegisterInfoPOSIX_arm64.h"
 #include "lldb-arm64-register-enums.h"
 #include "lldb/Target/RegisterContext.h"
 #include "lldb/Utility/Log.h"
@@ -19,8 +20,8 @@ class ProcessMonitor;
 class RegisterContextPOSIX_arm64 : public lldb_private::RegisterContext {
 public:
   RegisterContextPOSIX_arm64(
-      lldb_private::Thread &thread, uint32_t concrete_frame_idx,
-      lldb_private::RegisterInfoInterface *register_info);
+      lldb_private::Thread &thread,
+      std::unique_ptr<RegisterInfoPOSIX_arm64> register_info);
 
   ~RegisterContextPOSIX_arm64() override;
 
@@ -45,46 +46,14 @@ class RegisterContextPOSIX_arm64 : public lldb_private::RegisterContext {
   const char *GetRegisterName(unsigned reg);
 
 protected:
-  struct RegInfo {
-    uint32_t num_registers;
-    uint32_t num_gpr_registers;
-    uint32_t num_fpr_registers;
-
-    uint32_t last_gpr;
-    uint32_t first_fpr;
-    uint32_t last_fpr;
-
-    uint32_t first_fpr_v;
-    uint32_t last_fpr_v;
-
-    uint32_t gpr_flags;
-  };
-
-  // based on RegisterContextDarwin_arm64.h
-  struct VReg {
-    uint8_t bytes[16];
-  };
-
-  // based on RegisterContextDarwin_arm64.h
-  struct FPU {
-    VReg v[32];
-    uint32_t fpsr;
-    uint32_t fpcr;
-  };
-
   uint64_t m_gpr_arm64[lldb_private::k_num_gpr_registers_arm64]; // 64-bit
                                                                  // general
                                                                  // purpose
                                                                  // registers.
-  RegInfo m_reg_info;
-  struct RegisterContextPOSIX_arm64::FPU
-      m_fpr; // floating-point registers including extended register sets.
-  std::unique_ptr<lldb_private::RegisterInfoInterface>
-      m_register_info_up; // Register Info Interface (FreeBSD or Linux)
 
-  // Determines if an extended register set is supported on the processor
-  // running the inferior process.
-  virtual bool IsRegisterSetAvailable(size_t set_index);
+  struct RegisterInfoPOSIX_arm64::FPU
+      m_fpr; // floating-point registers including extended register sets.
+  std::unique_ptr<RegisterInfoPOSIX_arm64> m_register_info_up;
 
   virtual const lldb_private::RegisterInfo *GetRegisterInfo();
 
@@ -92,6 +61,8 @@ class RegisterContextPOSIX_arm64 : public lldb_private::RegisterContext {
 
   bool IsFPR(unsigned reg);
 
+  size_t GetFPUSize() { return sizeof(RegisterInfoPOSIX_arm64::FPU); }
+
   virtual bool ReadGPR() = 0;
   virtual bool ReadFPR() = 0;
   virtual bool WriteGPR() = 0;

diff  --git a/lldb/source/Plugins/Process/Utility/RegisterInfoAndSetInterface.h b/lldb/source/Plugins/Process/Utility/RegisterInfoAndSetInterface.h
new file mode 100644
index 000000000000..7e569dc9ba78
--- /dev/null
+++ b/lldb/source/Plugins/Process/Utility/RegisterInfoAndSetInterface.h
@@ -0,0 +1,36 @@
+//===-- RegisterInfoAndSetInterface.h ---------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_REGISTERINFOANDSETINTERFACE_H
+#define LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_REGISTERINFOANDSETINTERFACE_H
+
+#include "RegisterInfoInterface.h"
+
+#include "lldb/Utility/ArchSpec.h"
+#include "lldb/lldb-private-types.h"
+#include <vector>
+
+namespace lldb_private {
+
+class RegisterInfoAndSetInterface : public RegisterInfoInterface {
+public:
+  RegisterInfoAndSetInterface(const lldb_private::ArchSpec &target_arch)
+      : RegisterInfoInterface(target_arch) {}
+
+  virtual size_t GetFPRSize() const = 0;
+
+  virtual const lldb_private::RegisterSet *
+  GetRegisterSet(size_t reg_set) const = 0;
+
+  virtual size_t GetRegisterSetCount() const = 0;
+
+  virtual size_t GetRegisterSetFromRegisterIndex(uint32_t reg_index) const = 0;
+};
+} // namespace lldb_private
+
+#endif

diff  --git a/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.cpp b/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.cpp
index dccd7ac7d52d..4537cee42ad9 100644
--- a/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.cpp
+++ b/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.cpp
@@ -65,6 +65,82 @@ GetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
   }
 }
 
+// Number of register sets provided by this context.
+enum {
+  k_num_gpr_registers = gpr_w28 - gpr_x0 + 1,
+  k_num_fpr_registers = fpu_fpcr - fpu_v0 + 1,
+  k_num_register_sets = 2
+};
+
+// ARM64 general purpose registers.
+static const uint32_t g_gpr_regnums_arm64[] = {
+    gpr_x0,  gpr_x1,   gpr_x2,  gpr_x3,
+    gpr_x4,  gpr_x5,   gpr_x6,  gpr_x7,
+    gpr_x8,  gpr_x9,   gpr_x10, gpr_x11,
+    gpr_x12, gpr_x13,  gpr_x14, gpr_x15,
+    gpr_x16, gpr_x17,  gpr_x18, gpr_x19,
+    gpr_x20, gpr_x21,  gpr_x22, gpr_x23,
+    gpr_x24, gpr_x25,  gpr_x26, gpr_x27,
+    gpr_x28, gpr_fp,   gpr_lr,  gpr_sp,
+    gpr_pc,  gpr_cpsr, gpr_w0,  gpr_w1,
+    gpr_w2,  gpr_w3,   gpr_w4,  gpr_w5,
+    gpr_w6,  gpr_w7,   gpr_w8,  gpr_w9,
+    gpr_w10, gpr_w11,  gpr_w12, gpr_w13,
+    gpr_w14, gpr_w15,  gpr_w16, gpr_w17,
+    gpr_w18, gpr_w19,  gpr_w20, gpr_w21,
+    gpr_w22, gpr_w23,  gpr_w24, gpr_w25,
+    gpr_w26, gpr_w27,  gpr_w28, LLDB_INVALID_REGNUM};
+
+static_assert(((sizeof g_gpr_regnums_arm64 / sizeof g_gpr_regnums_arm64[0]) -
+               1) == k_num_gpr_registers,
+              "g_gpr_regnums_arm64 has wrong number of register infos");
+
+// ARM64 floating point registers.
+static const uint32_t g_fpu_regnums_arm64[] = {
+    fpu_v0,   fpu_v1,   fpu_v2,
+    fpu_v3,   fpu_v4,   fpu_v5,
+    fpu_v6,   fpu_v7,   fpu_v8,
+    fpu_v9,   fpu_v10,  fpu_v11,
+    fpu_v12,  fpu_v13,  fpu_v14,
+    fpu_v15,  fpu_v16,  fpu_v17,
+    fpu_v18,  fpu_v19,  fpu_v20,
+    fpu_v21,  fpu_v22,  fpu_v23,
+    fpu_v24,  fpu_v25,  fpu_v26,
+    fpu_v27,  fpu_v28,  fpu_v29,
+    fpu_v30,  fpu_v31,  fpu_s0,
+    fpu_s1,   fpu_s2,   fpu_s3,
+    fpu_s4,   fpu_s5,   fpu_s6,
+    fpu_s7,   fpu_s8,   fpu_s9,
+    fpu_s10,  fpu_s11,  fpu_s12,
+    fpu_s13,  fpu_s14,  fpu_s15,
+    fpu_s16,  fpu_s17,  fpu_s18,
+    fpu_s19,  fpu_s20,  fpu_s21,
+    fpu_s22,  fpu_s23,  fpu_s24,
+    fpu_s25,  fpu_s26,  fpu_s27,
+    fpu_s28,  fpu_s29,  fpu_s30,
+    fpu_s31,  fpu_d0,   fpu_d1,
+    fpu_d2,   fpu_d3,   fpu_d4,
+    fpu_d5,   fpu_d6,   fpu_d7,
+    fpu_d8,   fpu_d9,   fpu_d10,
+    fpu_d11,  fpu_d12,  fpu_d13,
+    fpu_d14,  fpu_d15,  fpu_d16,
+    fpu_d17,  fpu_d18,  fpu_d19,
+    fpu_d20,  fpu_d21,  fpu_d22,
+    fpu_d23,  fpu_d24,  fpu_d25,
+    fpu_d26,  fpu_d27,  fpu_d28,
+    fpu_d29,  fpu_d30,  fpu_d31,
+    fpu_fpsr, fpu_fpcr, LLDB_INVALID_REGNUM};
+static_assert(((sizeof g_fpu_regnums_arm64 / sizeof g_fpu_regnums_arm64[0]) -
+               1) == k_num_fpr_registers,
+              "g_fpu_regnums_arm64 has wrong number of register infos");
+// clang-format on
+// Register sets for ARM64.
+static const lldb_private::RegisterSet g_reg_sets_arm64[k_num_register_sets] = {
+    {"General Purpose Registers", "gpr", k_num_gpr_registers,
+     g_gpr_regnums_arm64},
+    {"Floating Point Registers", "fpu", k_num_fpr_registers,
+     g_fpu_regnums_arm64}};
+
 static uint32_t
 GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch) {
   switch (target_arch.GetMachine()) {
@@ -80,19 +156,60 @@ GetRegisterInfoCount(const lldb_private::ArchSpec &target_arch) {
 
 RegisterInfoPOSIX_arm64::RegisterInfoPOSIX_arm64(
     const lldb_private::ArchSpec &target_arch)
-    : lldb_private::RegisterInfoInterface(target_arch),
+    : lldb_private::RegisterInfoAndSetInterface(target_arch),
       m_register_info_p(GetRegisterInfoPtr(target_arch)),
-      m_register_info_count(GetRegisterInfoCount(target_arch)) {}
+      m_register_info_count(GetRegisterInfoCount(target_arch)) {
+
+  switch (target_arch.GetMachine()) {
+  case llvm::Triple::aarch64:
+  case llvm::Triple::aarch64_32:
+    num_registers = k_num_gpr_registers + k_num_fpr_registers;
+    num_gpr_registers = k_num_gpr_registers;
+    num_fpr_registers = k_num_fpr_registers;
+    last_gpr = gpr_w28;
+    first_fpr = fpu_v0;
+    last_fpr = fpu_fpcr;
+    break;
+  default:
+    assert(false && "Unhandled target architecture.");
+    break;
+  }
+}
+
+uint32_t RegisterInfoPOSIX_arm64::GetRegisterCount() const {
+  return num_gpr_registers + num_fpr_registers;
+}
 
 size_t RegisterInfoPOSIX_arm64::GetGPRSize() const {
   return sizeof(struct RegisterInfoPOSIX_arm64::GPR);
 }
 
+size_t RegisterInfoPOSIX_arm64::GetFPRSize() const {
+  return sizeof(struct RegisterInfoPOSIX_arm64::FPU);
+}
+
 const lldb_private::RegisterInfo *
 RegisterInfoPOSIX_arm64::GetRegisterInfo() const {
   return m_register_info_p;
 }
 
-uint32_t RegisterInfoPOSIX_arm64::GetRegisterCount() const {
-  return m_register_info_count;
+size_t RegisterInfoPOSIX_arm64::GetRegisterSetCount() const {
+  return k_num_register_sets;
+}
+
+size_t RegisterInfoPOSIX_arm64::GetRegisterSetFromRegisterIndex(
+    uint32_t reg_index) const {
+  if (reg_index <= last_gpr)
+    return GPRegSet;
+  else if (reg_index <= last_fpr)
+    return FPRegSet;
+  return LLDB_INVALID_REGNUM;
+}
+
+const lldb_private::RegisterSet *
+RegisterInfoPOSIX_arm64::GetRegisterSet(size_t set_index) const {
+  if (set_index < k_num_register_sets)
+    return &g_reg_sets_arm64[set_index];
+
+  return nullptr;
 }

diff  --git a/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h b/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h
index 2a27a655d197..2da6a531a6b6 100644
--- a/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h
+++ b/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h
@@ -9,12 +9,15 @@
 #ifndef LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_REGISTERINFOPOSIX_ARM64_H
 #define LLDB_SOURCE_PLUGINS_PROCESS_UTILITY_REGISTERINFOPOSIX_ARM64_H
 
-#include "RegisterInfoInterface.h"
+#include "RegisterInfoAndSetInterface.h"
 #include "lldb/Target/RegisterContext.h"
 #include "lldb/lldb-private.h"
 
-class RegisterInfoPOSIX_arm64 : public lldb_private::RegisterInfoInterface {
+class RegisterInfoPOSIX_arm64
+    : public lldb_private::RegisterInfoAndSetInterface {
 public:
+  enum { GPRegSet = 0, FPRegSet };
+
   // based on RegisterContextDarwin_arm64.h
   struct GPR {
     uint64_t x[29]; // x0-x28
@@ -57,11 +60,28 @@ class RegisterInfoPOSIX_arm64 : public lldb_private::RegisterInfoInterface {
 
   size_t GetGPRSize() const override;
 
+  size_t GetFPRSize() const override;
+
   const lldb_private::RegisterInfo *GetRegisterInfo() const override;
 
   uint32_t GetRegisterCount() const override;
 
+  const lldb_private::RegisterSet *
+  GetRegisterSet(size_t reg_set) const override;
+
+  size_t GetRegisterSetCount() const override;
+
+  size_t GetRegisterSetFromRegisterIndex(uint32_t reg_index) const override;
+
 private:
+  uint32_t num_registers;
+  uint32_t num_gpr_registers;
+  uint32_t num_fpr_registers;
+
+  uint32_t last_gpr;
+  uint32_t first_fpr;
+  uint32_t last_fpr;
+
   const lldb_private::RegisterInfo *m_register_info_p;
   uint32_t m_register_info_count;
 };

diff  --git a/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.cpp b/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.cpp
index 95c419b053fa..685567416983 100644
--- a/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.cpp
+++ b/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.cpp
@@ -17,16 +17,16 @@
 using namespace lldb_private;
 
 RegisterContextCorePOSIX_arm64::RegisterContextCorePOSIX_arm64(
-    Thread &thread, RegisterInfoInterface *register_info,
+    Thread &thread, std::unique_ptr<RegisterInfoPOSIX_arm64> register_info,
     const DataExtractor &gpregset, llvm::ArrayRef<CoreNote> notes)
-    : RegisterContextPOSIX_arm64(thread, 0, register_info) {
+    : RegisterContextPOSIX_arm64(thread, std::move(register_info)) {
   m_gpr_buffer = std::make_shared<DataBufferHeap>(gpregset.GetDataStart(),
                                                   gpregset.GetByteSize());
   m_gpr.SetData(m_gpr_buffer);
   m_gpr.SetByteOrder(gpregset.GetByteOrder());
 
   m_fpregset = getRegset(
-      notes, register_info->GetTargetArchitecture().GetTriple(), FPR_Desc);
+      notes, m_register_info_up->GetTargetArchitecture().GetTriple(), FPR_Desc);
 }
 
 RegisterContextCorePOSIX_arm64::~RegisterContextCorePOSIX_arm64() {}
@@ -61,7 +61,7 @@ bool RegisterContextCorePOSIX_arm64::ReadRegister(const RegisterInfo *reg_info,
     return false;
 
   offset -= GetGPRSize();
-  if (IsFPR(reg) && offset + reg_info->byte_size <= sizeof(FPU)) {
+  if (IsFPR(reg) && offset + reg_info->byte_size <= GetFPUSize()) {
     Status error;
     value.SetFromMemoryData(reg_info, m_fpregset.GetDataStart() + offset,
                             reg_info->byte_size, lldb::eByteOrderLittle, error);

diff  --git a/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.h b/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.h
index 5bbcdf5677f6..830e0ff91e4c 100644
--- a/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.h
+++ b/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.h
@@ -18,7 +18,7 @@ class RegisterContextCorePOSIX_arm64 : public RegisterContextPOSIX_arm64 {
 public:
   RegisterContextCorePOSIX_arm64(
       lldb_private::Thread &thread,
-      lldb_private::RegisterInfoInterface *register_info,
+      std::unique_ptr<RegisterInfoPOSIX_arm64> register_info,
       const lldb_private::DataExtractor &gpregset,
       llvm::ArrayRef<lldb_private::CoreNote> notes);
 

diff  --git a/lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp b/lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp
index 714090459cbb..6b5acfa4bc1b 100644
--- a/lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp
+++ b/lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp
@@ -82,7 +82,6 @@ ThreadElfCore::CreateRegisterContextForFrame(StackFrame *frame) {
     case llvm::Triple::FreeBSD: {
       switch (arch.GetMachine()) {
       case llvm::Triple::aarch64:
-        reg_interface = new RegisterInfoPOSIX_arm64(arch);
         break;
       case llvm::Triple::arm:
         reg_interface = new RegisterInfoPOSIX_arm(arch);
@@ -111,7 +110,6 @@ ThreadElfCore::CreateRegisterContextForFrame(StackFrame *frame) {
     case llvm::Triple::NetBSD: {
       switch (arch.GetMachine()) {
       case llvm::Triple::aarch64:
-        reg_interface = new RegisterInfoPOSIX_arm64(arch);
         break;
       case llvm::Triple::x86_64:
         reg_interface = new RegisterContextNetBSD_x86_64(arch);
@@ -128,7 +126,6 @@ ThreadElfCore::CreateRegisterContextForFrame(StackFrame *frame) {
         reg_interface = new RegisterInfoPOSIX_arm(arch);
         break;
       case llvm::Triple::aarch64:
-        reg_interface = new RegisterInfoPOSIX_arm64(arch);
         break;
       case llvm::Triple::mipsel:
       case llvm::Triple::mips:
@@ -159,7 +156,6 @@ ThreadElfCore::CreateRegisterContextForFrame(StackFrame *frame) {
     case llvm::Triple::OpenBSD: {
       switch (arch.GetMachine()) {
       case llvm::Triple::aarch64:
-        reg_interface = new RegisterInfoPOSIX_arm64(arch);
         break;
       case llvm::Triple::arm:
         reg_interface = new RegisterInfoPOSIX_arm(arch);
@@ -180,7 +176,7 @@ ThreadElfCore::CreateRegisterContextForFrame(StackFrame *frame) {
       break;
     }
 
-    if (!reg_interface) {
+    if (!reg_interface && arch.GetMachine() != llvm::Triple::aarch64) {
       LLDB_LOGF(log, "elf-core::%s:: Architecture(%d) or OS(%d) not supported",
                 __FUNCTION__, arch.GetMachine(), arch.GetTriple().getOS());
       assert(false && "Architecture or OS not supported");
@@ -189,7 +185,8 @@ ThreadElfCore::CreateRegisterContextForFrame(StackFrame *frame) {
     switch (arch.GetMachine()) {
     case llvm::Triple::aarch64:
       m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_arm64>(
-          *this, reg_interface, m_gpregset_data, m_notes);
+          *this, std::make_unique<RegisterInfoPOSIX_arm64>(arch),
+          m_gpregset_data, m_notes);
       break;
     case llvm::Triple::arm:
       m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_arm>(


        


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