lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_powerpc.cpp

   1 //===-- RegisterContextPOSIX_powerpc.cpp ----------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include <cerrno>
  10 #include <cstdint>
  11 #include <cstring>
  12
  13 #include "lldb/Target/Process.h"
  14 #include "lldb/Target/Target.h"
  15 #include "lldb/Target/Thread.h"
  16 #include "lldb/Utility/DataBufferHeap.h"
  17 #include "lldb/Utility/DataExtractor.h"
  18 #include "lldb/Utility/Endian.h"
  19 #include "lldb/Utility/RegisterValue.h"
  20 #include "lldb/Utility/Scalar.h"
  21 #include "llvm/Support/Compiler.h"
  22
  23 #include "RegisterContextPOSIX_powerpc.h"
  24
  25 using namespace lldb_private;
  26 using namespace lldb;
  27
  28 static const uint32_t g_gpr_regnums[] = {
  29     gpr_r0_powerpc,  gpr_r1_powerpc,  gpr_r2_powerpc,  gpr_r3_powerpc,
  30     gpr_r4_powerpc,  gpr_r5_powerpc,  gpr_r6_powerpc,  gpr_r7_powerpc,
  31     gpr_r8_powerpc,  gpr_r9_powerpc,  gpr_r10_powerpc, gpr_r11_powerpc,
  32     gpr_r12_powerpc, gpr_r13_powerpc, gpr_r14_powerpc, gpr_r15_powerpc,
  33     gpr_r16_powerpc, gpr_r17_powerpc, gpr_r18_powerpc, gpr_r19_powerpc,
  34     gpr_r20_powerpc, gpr_r21_powerpc, gpr_r22_powerpc, gpr_r23_powerpc,
  35     gpr_r24_powerpc, gpr_r25_powerpc, gpr_r26_powerpc, gpr_r27_powerpc,
  36     gpr_r28_powerpc, gpr_r29_powerpc, gpr_r30_powerpc, gpr_r31_powerpc,
  37     gpr_lr_powerpc,  gpr_cr_powerpc,  gpr_xer_powerpc, gpr_ctr_powerpc,
  38     gpr_pc_powerpc,
  39 };
  40
  41 static const uint32_t g_fpr_regnums[] = {
  42     fpr_f0_powerpc,    fpr_f1_powerpc,  fpr_f2_powerpc,  fpr_f3_powerpc,
  43     fpr_f4_powerpc,    fpr_f5_powerpc,  fpr_f6_powerpc,  fpr_f7_powerpc,
  44     fpr_f8_powerpc,    fpr_f9_powerpc,  fpr_f10_powerpc, fpr_f11_powerpc,
  45     fpr_f12_powerpc,   fpr_f13_powerpc, fpr_f14_powerpc, fpr_f15_powerpc,
  46     fpr_f16_powerpc,   fpr_f17_powerpc, fpr_f18_powerpc, fpr_f19_powerpc,
  47     fpr_f20_powerpc,   fpr_f21_powerpc, fpr_f22_powerpc, fpr_f23_powerpc,
  48     fpr_f24_powerpc,   fpr_f25_powerpc, fpr_f26_powerpc, fpr_f27_powerpc,
  49     fpr_f28_powerpc,   fpr_f29_powerpc, fpr_f30_powerpc, fpr_f31_powerpc,
  50     fpr_fpscr_powerpc,
  51 };
  52
  53 static const uint32_t g_vmx_regnums[] = {
  54     vmx_v0_powerpc,     vmx_v1_powerpc,   vmx_v2_powerpc,  vmx_v3_powerpc,
  55     vmx_v4_powerpc,     vmx_v5_powerpc,   vmx_v6_powerpc,  vmx_v7_powerpc,
  56     vmx_v8_powerpc,     vmx_v9_powerpc,   vmx_v10_powerpc, vmx_v11_powerpc,
  57     vmx_v12_powerpc,    vmx_v13_powerpc,  vmx_v14_powerpc, vmx_v15_powerpc,
  58     vmx_v16_powerpc,    vmx_v17_powerpc,  vmx_v18_powerpc, vmx_v19_powerpc,
  59     vmx_v20_powerpc,    vmx_v21_powerpc,  vmx_v22_powerpc, vmx_v23_powerpc,
  60     vmx_v24_powerpc,    vmx_v25_powerpc,  vmx_v26_powerpc, vmx_v27_powerpc,
  61     vmx_v28_powerpc,    vmx_v29_powerpc,  vmx_v30_powerpc, vmx_v31_powerpc,
  62     vmx_vrsave_powerpc, vmx_vscr_powerpc,
  63 };
  64
  65 // Number of register sets provided by this context.
  66 enum { k_num_register_sets = 3 };
  67
  68 static const RegisterSet g_reg_sets_powerpc[k_num_register_sets] = {
  69     {"General Purpose Registers", "gpr", k_num_gpr_registers_powerpc,
  70      g_gpr_regnums},
  71     {"Floating Point Registers", "fpr", k_num_fpr_registers_powerpc,
  72      g_fpr_regnums},
  73     {"Altivec/VMX Registers", "vmx", k_num_vmx_registers_powerpc,
  74      g_vmx_regnums},
  75 };
  76
  77 static_assert(k_first_gpr_powerpc == 0,
  78               "GPRs must index starting at 0, or fix IsGPR()");
  79 bool RegisterContextPOSIX_powerpc::IsGPR(unsigned reg) {
  80   return (reg <= k_last_gpr_powerpc); // GPR's come first.
  81 }
  82
  83 bool RegisterContextPOSIX_powerpc::IsFPR(unsigned reg) {
  84   return (reg >= k_first_fpr) && (reg <= k_last_fpr);
  85 }
  86
  87 bool RegisterContextPOSIX_powerpc::IsVMX(unsigned reg) {
  88   return (reg >= k_first_vmx) && (reg <= k_last_vmx);
  89 }
  90
  91 RegisterContextPOSIX_powerpc::RegisterContextPOSIX_powerpc(
  92     Thread &thread, uint32_t concrete_frame_idx,
  93     RegisterInfoInterface *register_info)
  94     : RegisterContext(thread, concrete_frame_idx) {
  95   m_register_info_up.reset(register_info);
  96 }
  97
  98 RegisterContextPOSIX_powerpc::~RegisterContextPOSIX_powerpc() = default;
  99
 100 void RegisterContextPOSIX_powerpc::Invalidate() {}
 101
 102 void RegisterContextPOSIX_powerpc::InvalidateAllRegisters() {}
 103
 104 unsigned RegisterContextPOSIX_powerpc::GetRegisterOffset(unsigned reg) {
 105   assert(reg < k_num_registers_powerpc && "Invalid register number.");
 106   return GetRegisterInfo()[reg].byte_offset;
 107 }
 108
 109 unsigned RegisterContextPOSIX_powerpc::GetRegisterSize(unsigned reg) {
 110   assert(reg < k_num_registers_powerpc && "Invalid register number.");
 111   return GetRegisterInfo()[reg].byte_size;
 112 }
 113
 114 size_t RegisterContextPOSIX_powerpc::GetRegisterCount() {
 115   size_t num_registers = k_num_registers_powerpc;
 116   return num_registers;
 117 }
 118
 119 size_t RegisterContextPOSIX_powerpc::GetGPRSize() {
 120   return m_register_info_up->GetGPRSize();
 121 }
 122
 123 const RegisterInfo *RegisterContextPOSIX_powerpc::GetRegisterInfo() {
 124   // Commonly, this method is overridden and g_register_infos is copied and
 125   // specialized. So, use GetRegisterInfo() rather than g_register_infos in
 126   // this scope.
 127   return m_register_info_up->GetRegisterInfo();
 128 }
 129
 130 const RegisterInfo *
 131 RegisterContextPOSIX_powerpc::GetRegisterInfoAtIndex(size_t reg) {
 132   if (reg < k_num_registers_powerpc)
 133     return &GetRegisterInfo()[reg];
 134   else
 135     return nullptr;
 136 }
 137
 138 size_t RegisterContextPOSIX_powerpc::GetRegisterSetCount() {
 139   size_t sets = 0;
 140   for (size_t set = 0; set < k_num_register_sets; ++set) {
 141     if (IsRegisterSetAvailable(set))
 142       ++sets;
 143   }
 144
 145   return sets;
 146 }
 147
 148 const RegisterSet *RegisterContextPOSIX_powerpc::GetRegisterSet(size_t set) {
 149   if (IsRegisterSetAvailable(set))
 150     return &g_reg_sets_powerpc[set];
 151   else
 152     return nullptr;
 153 }
 154
 155 const char *RegisterContextPOSIX_powerpc::GetRegisterName(unsigned reg) {
 156   assert(reg < k_num_registers_powerpc && "Invalid register offset.");
 157   return GetRegisterInfo()[reg].name;
 158 }
 159
 160 bool RegisterContextPOSIX_powerpc::IsRegisterSetAvailable(size_t set_index) {
 161   size_t num_sets = k_num_register_sets;
 162
 163   return (set_index < num_sets);
 164 }