RegisterContextPOSIX_powerpc.cpp revision 314564
1//===-- RegisterContextPOSIX_powerpc.cpp -------------------------*- C++ 2//-*-===// 3// 4// The LLVM Compiler Infrastructure 5// 6// This file is distributed under the University of Illinois Open Source 7// License. See LICENSE.TXT for details. 8// 9//===----------------------------------------------------------------------===// 10 11#include <cstring> 12#include <errno.h> 13#include <stdint.h> 14 15#include "lldb/Core/DataBufferHeap.h" 16#include "lldb/Core/DataExtractor.h" 17#include "lldb/Core/RegisterValue.h" 18#include "lldb/Core/Scalar.h" 19#include "lldb/Host/Endian.h" 20#include "lldb/Target/Target.h" 21#include "lldb/Target/Thread.h" 22#include "llvm/Support/Compiler.h" 23 24#include "Plugins/Process/elf-core/ProcessElfCore.h" 25#include "RegisterContextPOSIX_powerpc.h" 26 27using namespace lldb_private; 28using namespace lldb; 29 30static const uint32_t g_gpr_regnums[] = { 31 gpr_r0_powerpc, gpr_r1_powerpc, gpr_r2_powerpc, gpr_r3_powerpc, 32 gpr_r4_powerpc, gpr_r5_powerpc, gpr_r6_powerpc, gpr_r7_powerpc, 33 gpr_r8_powerpc, gpr_r9_powerpc, gpr_r10_powerpc, gpr_r11_powerpc, 34 gpr_r12_powerpc, gpr_r13_powerpc, gpr_r14_powerpc, gpr_r15_powerpc, 35 gpr_r16_powerpc, gpr_r17_powerpc, gpr_r18_powerpc, gpr_r19_powerpc, 36 gpr_r20_powerpc, gpr_r21_powerpc, gpr_r22_powerpc, gpr_r23_powerpc, 37 gpr_r24_powerpc, gpr_r25_powerpc, gpr_r26_powerpc, gpr_r27_powerpc, 38 gpr_r28_powerpc, gpr_r29_powerpc, gpr_r30_powerpc, gpr_r31_powerpc, 39 gpr_lr_powerpc, gpr_cr_powerpc, gpr_xer_powerpc, gpr_ctr_powerpc, 40 gpr_pc_powerpc, 41}; 42 43static const uint32_t g_fpr_regnums[] = { 44 fpr_f0_powerpc, fpr_f1_powerpc, fpr_f2_powerpc, fpr_f3_powerpc, 45 fpr_f4_powerpc, fpr_f5_powerpc, fpr_f6_powerpc, fpr_f7_powerpc, 46 fpr_f8_powerpc, fpr_f9_powerpc, fpr_f10_powerpc, fpr_f11_powerpc, 47 fpr_f12_powerpc, fpr_f13_powerpc, fpr_f14_powerpc, fpr_f15_powerpc, 48 fpr_f16_powerpc, fpr_f17_powerpc, fpr_f18_powerpc, fpr_f19_powerpc, 49 fpr_f20_powerpc, fpr_f21_powerpc, fpr_f22_powerpc, fpr_f23_powerpc, 50 fpr_f24_powerpc, fpr_f25_powerpc, fpr_f26_powerpc, fpr_f27_powerpc, 51 fpr_f28_powerpc, fpr_f29_powerpc, fpr_f30_powerpc, fpr_f31_powerpc, 52 fpr_fpscr_powerpc, 53}; 54 55static const uint32_t g_vmx_regnums[] = { 56 vmx_v0_powerpc, vmx_v1_powerpc, vmx_v2_powerpc, vmx_v3_powerpc, 57 vmx_v4_powerpc, vmx_v5_powerpc, vmx_v6_powerpc, vmx_v7_powerpc, 58 vmx_v8_powerpc, vmx_v9_powerpc, vmx_v10_powerpc, vmx_v11_powerpc, 59 vmx_v12_powerpc, vmx_v13_powerpc, vmx_v14_powerpc, vmx_v15_powerpc, 60 vmx_v16_powerpc, vmx_v17_powerpc, vmx_v18_powerpc, vmx_v19_powerpc, 61 vmx_v20_powerpc, vmx_v21_powerpc, vmx_v22_powerpc, vmx_v23_powerpc, 62 vmx_v24_powerpc, vmx_v25_powerpc, vmx_v26_powerpc, vmx_v27_powerpc, 63 vmx_v28_powerpc, vmx_v29_powerpc, vmx_v30_powerpc, vmx_v31_powerpc, 64 vmx_vrsave_powerpc, vmx_vscr_powerpc, 65}; 66 67// Number of register sets provided by this context. 68enum { k_num_register_sets = 3 }; 69 70static const RegisterSet g_reg_sets_powerpc[k_num_register_sets] = { 71 {"General Purpose Registers", "gpr", k_num_gpr_registers_powerpc, 72 g_gpr_regnums}, 73 {"Floating Point Registers", "fpr", k_num_fpr_registers_powerpc, 74 g_fpr_regnums}, 75 {"Altivec/VMX Registers", "vmx", k_num_vmx_registers_powerpc, 76 g_vmx_regnums}, 77}; 78 79static_assert(k_first_gpr_powerpc == 0, 80 "GPRs must index starting at 0, or fix IsGPR()"); 81bool RegisterContextPOSIX_powerpc::IsGPR(unsigned reg) { 82 return (reg <= k_last_gpr_powerpc); // GPR's come first. 83} 84 85bool RegisterContextPOSIX_powerpc::IsFPR(unsigned reg) { 86 return (reg >= k_first_fpr) && (reg <= k_last_fpr); 87} 88 89bool RegisterContextPOSIX_powerpc::IsVMX(unsigned reg) { 90 return (reg >= k_first_vmx) && (reg <= k_last_vmx); 91} 92 93RegisterContextPOSIX_powerpc::RegisterContextPOSIX_powerpc( 94 Thread &thread, uint32_t concrete_frame_idx, 95 RegisterInfoInterface *register_info) 96 : RegisterContext(thread, concrete_frame_idx) { 97 m_register_info_ap.reset(register_info); 98 99 // elf-core yet to support ReadFPR() 100 ProcessSP base = CalculateProcess(); 101 if (base.get()->GetPluginName() == ProcessElfCore::GetPluginNameStatic()) 102 return; 103} 104 105RegisterContextPOSIX_powerpc::~RegisterContextPOSIX_powerpc() {} 106 107void RegisterContextPOSIX_powerpc::Invalidate() {} 108 109void RegisterContextPOSIX_powerpc::InvalidateAllRegisters() {} 110 111unsigned RegisterContextPOSIX_powerpc::GetRegisterOffset(unsigned reg) { 112 assert(reg < k_num_registers_powerpc && "Invalid register number."); 113 return GetRegisterInfo()[reg].byte_offset; 114} 115 116unsigned RegisterContextPOSIX_powerpc::GetRegisterSize(unsigned reg) { 117 assert(reg < k_num_registers_powerpc && "Invalid register number."); 118 return GetRegisterInfo()[reg].byte_size; 119} 120 121size_t RegisterContextPOSIX_powerpc::GetRegisterCount() { 122 size_t num_registers = k_num_registers_powerpc; 123 return num_registers; 124} 125 126size_t RegisterContextPOSIX_powerpc::GetGPRSize() { 127 return m_register_info_ap->GetGPRSize(); 128} 129 130const RegisterInfo *RegisterContextPOSIX_powerpc::GetRegisterInfo() { 131 // Commonly, this method is overridden and g_register_infos is copied and 132 // specialized. 133 // So, use GetRegisterInfo() rather than g_register_infos in this scope. 134 return m_register_info_ap->GetRegisterInfo(); 135} 136 137const RegisterInfo * 138RegisterContextPOSIX_powerpc::GetRegisterInfoAtIndex(size_t reg) { 139 if (reg < k_num_registers_powerpc) 140 return &GetRegisterInfo()[reg]; 141 else 142 return NULL; 143} 144 145size_t RegisterContextPOSIX_powerpc::GetRegisterSetCount() { 146 size_t sets = 0; 147 for (size_t set = 0; set < k_num_register_sets; ++set) { 148 if (IsRegisterSetAvailable(set)) 149 ++sets; 150 } 151 152 return sets; 153} 154 155const RegisterSet *RegisterContextPOSIX_powerpc::GetRegisterSet(size_t set) { 156 if (IsRegisterSetAvailable(set)) 157 return &g_reg_sets_powerpc[set]; 158 else 159 return NULL; 160} 161 162const char *RegisterContextPOSIX_powerpc::GetRegisterName(unsigned reg) { 163 assert(reg < k_num_registers_powerpc && "Invalid register offset."); 164 return GetRegisterInfo()[reg].name; 165} 166 167lldb::ByteOrder RegisterContextPOSIX_powerpc::GetByteOrder() { 168 // Get the target process whose privileged thread was used for the register 169 // read. 170 lldb::ByteOrder byte_order = eByteOrderInvalid; 171 Process *process = CalculateProcess().get(); 172 173 if (process) 174 byte_order = process->GetByteOrder(); 175 return byte_order; 176} 177 178bool RegisterContextPOSIX_powerpc::IsRegisterSetAvailable(size_t set_index) { 179 size_t num_sets = k_num_register_sets; 180 181 return (set_index < num_sets); 182} 183 184// Used when parsing DWARF and EH frame information and any other 185// object file sections that contain register numbers in them. 186uint32_t RegisterContextPOSIX_powerpc::ConvertRegisterKindToRegisterNumber( 187 lldb::RegisterKind kind, uint32_t num) { 188 const uint32_t num_regs = GetRegisterCount(); 189 190 assert(kind < kNumRegisterKinds); 191 for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx) { 192 const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg_idx); 193 194 if (reg_info->kinds[kind] == num) 195 return reg_idx; 196 } 197 198 return LLDB_INVALID_REGNUM; 199} 200