1 //===-- RegisterContextPOSIX_s390x.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_s390x.h" 24 #include "RegisterContext_s390x.h" 25 26 using namespace lldb_private; 27 using namespace lldb; 28 29 // s390x 64-bit general purpose registers. 30 static const uint32_t g_gpr_regnums_s390x[] = { 31 lldb_r0_s390x, lldb_r1_s390x, lldb_r2_s390x, lldb_r3_s390x, 32 lldb_r4_s390x, lldb_r5_s390x, lldb_r6_s390x, lldb_r7_s390x, 33 lldb_r8_s390x, lldb_r9_s390x, lldb_r10_s390x, lldb_r11_s390x, 34 lldb_r12_s390x, lldb_r13_s390x, lldb_r14_s390x, lldb_r15_s390x, 35 lldb_acr0_s390x, lldb_acr1_s390x, lldb_acr2_s390x, lldb_acr3_s390x, 36 lldb_acr4_s390x, lldb_acr5_s390x, lldb_acr6_s390x, lldb_acr7_s390x, 37 lldb_acr8_s390x, lldb_acr9_s390x, lldb_acr10_s390x, lldb_acr11_s390x, 38 lldb_acr12_s390x, lldb_acr13_s390x, lldb_acr14_s390x, lldb_acr15_s390x, 39 lldb_pswm_s390x, lldb_pswa_s390x, 40 LLDB_INVALID_REGNUM // register sets need to end with this flag 41 }; 42 static_assert((sizeof(g_gpr_regnums_s390x) / sizeof(g_gpr_regnums_s390x[0])) - 43 1 == 44 k_num_gpr_registers_s390x, 45 "g_gpr_regnums_s390x has wrong number of register infos"); 46 47 // s390x 64-bit floating point registers. 48 static const uint32_t g_fpu_regnums_s390x[] = { 49 lldb_f0_s390x, lldb_f1_s390x, lldb_f2_s390x, lldb_f3_s390x, 50 lldb_f4_s390x, lldb_f5_s390x, lldb_f6_s390x, lldb_f7_s390x, 51 lldb_f8_s390x, lldb_f9_s390x, lldb_f10_s390x, lldb_f11_s390x, 52 lldb_f12_s390x, lldb_f13_s390x, lldb_f14_s390x, lldb_f15_s390x, 53 lldb_fpc_s390x, 54 LLDB_INVALID_REGNUM // register sets need to end with this flag 55 }; 56 static_assert((sizeof(g_fpu_regnums_s390x) / sizeof(g_fpu_regnums_s390x[0])) - 57 1 == 58 k_num_fpr_registers_s390x, 59 "g_fpu_regnums_s390x has wrong number of register infos"); 60 61 // Number of register sets provided by this context. 62 enum { k_num_register_sets = 2 }; 63 64 // Register sets for s390x 64-bit. 65 static const RegisterSet g_reg_sets_s390x[k_num_register_sets] = { 66 {"General Purpose Registers", "gpr", k_num_gpr_registers_s390x, 67 g_gpr_regnums_s390x}, 68 {"Floating Point Registers", "fpr", k_num_fpr_registers_s390x, 69 g_fpu_regnums_s390x}, 70 }; 71 72 bool RegisterContextPOSIX_s390x::IsGPR(unsigned reg) { 73 return reg <= m_reg_info.last_gpr; // GPRs come first. 74 } 75 76 bool RegisterContextPOSIX_s390x::IsFPR(unsigned reg) { 77 return (m_reg_info.first_fpr <= reg && reg <= m_reg_info.last_fpr); 78 } 79 80 RegisterContextPOSIX_s390x::RegisterContextPOSIX_s390x( 81 Thread &thread, uint32_t concrete_frame_idx, 82 RegisterInfoInterface *register_info) 83 : RegisterContext(thread, concrete_frame_idx) { 84 m_register_info_up.reset(register_info); 85 86 switch (register_info->m_target_arch.GetMachine()) { 87 case llvm::Triple::systemz: 88 m_reg_info.num_registers = k_num_registers_s390x; 89 m_reg_info.num_gpr_registers = k_num_gpr_registers_s390x; 90 m_reg_info.num_fpr_registers = k_num_fpr_registers_s390x; 91 m_reg_info.last_gpr = k_last_gpr_s390x; 92 m_reg_info.first_fpr = k_first_fpr_s390x; 93 m_reg_info.last_fpr = k_last_fpr_s390x; 94 break; 95 default: 96 assert(false && "Unhandled target architecture."); 97 break; 98 } 99 } 100 101 RegisterContextPOSIX_s390x::~RegisterContextPOSIX_s390x() = default; 102 103 void RegisterContextPOSIX_s390x::Invalidate() {} 104 105 void RegisterContextPOSIX_s390x::InvalidateAllRegisters() {} 106 107 const RegisterInfo *RegisterContextPOSIX_s390x::GetRegisterInfo() { 108 return m_register_info_up->GetRegisterInfo(); 109 } 110 111 const RegisterInfo * 112 RegisterContextPOSIX_s390x::GetRegisterInfoAtIndex(size_t reg) { 113 if (reg < m_reg_info.num_registers) 114 return &GetRegisterInfo()[reg]; 115 else 116 return nullptr; 117 } 118 119 size_t RegisterContextPOSIX_s390x::GetRegisterCount() { 120 return m_reg_info.num_registers; 121 } 122 123 unsigned RegisterContextPOSIX_s390x::GetRegisterOffset(unsigned reg) { 124 assert(reg < m_reg_info.num_registers && "Invalid register number."); 125 return GetRegisterInfo()[reg].byte_offset; 126 } 127 128 unsigned RegisterContextPOSIX_s390x::GetRegisterSize(unsigned reg) { 129 assert(reg < m_reg_info.num_registers && "Invalid register number."); 130 return GetRegisterInfo()[reg].byte_size; 131 } 132 133 const char *RegisterContextPOSIX_s390x::GetRegisterName(unsigned reg) { 134 assert(reg < m_reg_info.num_registers && "Invalid register offset."); 135 return GetRegisterInfo()[reg].name; 136 } 137 138 bool RegisterContextPOSIX_s390x::IsRegisterSetAvailable(size_t set_index) { 139 return set_index < k_num_register_sets; 140 } 141 142 size_t RegisterContextPOSIX_s390x::GetRegisterSetCount() { 143 size_t sets = 0; 144 for (size_t set = 0; set < k_num_register_sets; ++set) { 145 if (IsRegisterSetAvailable(set)) 146 ++sets; 147 } 148 149 return sets; 150 } 151 152 const RegisterSet *RegisterContextPOSIX_s390x::GetRegisterSet(size_t set) { 153 if (IsRegisterSetAvailable(set)) { 154 switch (m_register_info_up->m_target_arch.GetMachine()) { 155 case llvm::Triple::systemz: 156 return &g_reg_sets_s390x[set]; 157 default: 158 assert(false && "Unhandled target architecture."); 159 return nullptr; 160 } 161 } 162 return nullptr; 163 } 164