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 } 165