contrib/llvm/tools/lldb/source/Plugins/Process/POSIX/RegisterContextPOSIX_mips64.cpp

   1 //===-- RegisterContextPOSIX_mips64.cpp -------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include <cstring>
  11 #include <errno.h>
  12 #include <stdint.h>
  13
  14 #include "lldb/Core/DataBufferHeap.h"
  15 #include "lldb/Core/DataExtractor.h"
  16 #include "lldb/Core/RegisterValue.h"
  17 #include "lldb/Core/Scalar.h"
  18 #include "lldb/Target/Target.h"
  19 #include "lldb/Target/Thread.h"
  20 #include "lldb/Host/Endian.h"
  21 #include "llvm/Support/Compiler.h"
  22
  23 #include "ProcessPOSIX.h"
  24 #include "RegisterContextPOSIX_mips64.h"
  25 #include "Plugins/Process/elf-core/ProcessElfCore.h"
  26
  27 using namespace lldb_private;
  28 using namespace lldb;
  29
  30 static const
  31 uint32_t g_gpr_regnums[] =
  32 {
  33     gpr_zero_mips64,
  34     gpr_r1_mips64,
  35     gpr_r2_mips64,
  36     gpr_r3_mips64,
  37     gpr_r4_mips64,
  38     gpr_r5_mips64,
  39     gpr_r6_mips64,
  40     gpr_r7_mips64,
  41     gpr_r8_mips64,
  42     gpr_r9_mips64,
  43     gpr_r10_mips64,
  44     gpr_r11_mips64,
  45     gpr_r12_mips64,
  46     gpr_r13_mips64,
  47     gpr_r14_mips64,
  48     gpr_r15_mips64,
  49     gpr_r16_mips64,
  50     gpr_r17_mips64,
  51     gpr_r18_mips64,
  52     gpr_r19_mips64,
  53     gpr_r20_mips64,
  54     gpr_r21_mips64,
  55     gpr_r22_mips64,
  56     gpr_r23_mips64,
  57     gpr_r24_mips64,
  58     gpr_r25_mips64,
  59     gpr_r26_mips64,
  60     gpr_r27_mips64,
  61     gpr_gp_mips64,
  62     gpr_sp_mips64,
  63     gpr_r30_mips64,
  64     gpr_ra_mips64,
  65     gpr_sr_mips64,
  66     gpr_mullo_mips64,
  67     gpr_mulhi_mips64,
  68     gpr_badvaddr_mips64,
  69     gpr_cause_mips64,
  70     gpr_pc_mips64,
  71     gpr_ic_mips64,
  72     gpr_dummy_mips64
  73 };
  74
  75 // Number of register sets provided by this context.
  76 enum
  77 {
  78     k_num_register_sets = 1
  79 };
  80
  81 static const RegisterSet
  82 g_reg_sets_mips64[k_num_register_sets] =
  83 {
  84     { "General Purpose Registers",  "gpr", k_num_gpr_registers_mips64, g_gpr_regnums },
  85 };
  86
  87 bool RegisterContextPOSIX_mips64::IsGPR(unsigned reg)
  88 {
  89     return reg <= k_num_gpr_registers_mips64;   // GPR's come first.
  90 }
  91
  92 bool
  93 RegisterContextPOSIX_mips64::IsFPR(unsigned reg)
  94 {
  95     // XXX
  96     return false;
  97 }
  98
  99 RegisterContextPOSIX_mips64::RegisterContextPOSIX_mips64(Thread &thread,
 100                                                uint32_t concrete_frame_idx,
 101                                                RegisterInfoInterface *register_info)
 102     : RegisterContext(thread, concrete_frame_idx)
 103 {
 104     m_register_info_ap.reset(register_info);
 105
 106     // elf-core yet to support ReadFPR()
 107     ProcessSP base = CalculateProcess();
 108     if (base.get()->GetPluginName() ==  ProcessElfCore::GetPluginNameStatic())
 109         return;
 110 }
 111
 112 RegisterContextPOSIX_mips64::~RegisterContextPOSIX_mips64()
 113 {
 114 }
 115
 116 void
 117 RegisterContextPOSIX_mips64::Invalidate()
 118 {
 119 }
 120
 121 void
 122 RegisterContextPOSIX_mips64::InvalidateAllRegisters()
 123 {
 124 }
 125
 126 unsigned
 127 RegisterContextPOSIX_mips64::GetRegisterOffset(unsigned reg)
 128 {
 129     assert(reg < k_num_registers_mips64 && "Invalid register number.");
 130     return GetRegisterInfo()[reg].byte_offset;
 131 }
 132
 133 unsigned
 134 RegisterContextPOSIX_mips64::GetRegisterSize(unsigned reg)
 135 {
 136     assert(reg < k_num_registers_mips64 && "Invalid register number.");
 137     return GetRegisterInfo()[reg].byte_size;
 138 }
 139
 140 size_t
 141 RegisterContextPOSIX_mips64::GetRegisterCount()
 142 {
 143     size_t num_registers = k_num_registers_mips64;
 144     return num_registers;
 145 }
 146
 147 size_t
 148 RegisterContextPOSIX_mips64::GetGPRSize()
 149 {
 150     return m_register_info_ap->GetGPRSize();
 151 }
 152
 153 const RegisterInfo *
 154 RegisterContextPOSIX_mips64::GetRegisterInfo()
 155 {
 156     // Commonly, this method is overridden and g_register_infos is copied and specialized.
 157     // So, use GetRegisterInfo() rather than g_register_infos in this scope.
 158     return m_register_info_ap->GetRegisterInfo ();
 159 }
 160
 161 const RegisterInfo *
 162 RegisterContextPOSIX_mips64::GetRegisterInfoAtIndex(size_t reg)
 163 {
 164     if (reg < k_num_registers_mips64)
 165         return &GetRegisterInfo()[reg];
 166     else
 167         return NULL;
 168 }
 169
 170 size_t
 171 RegisterContextPOSIX_mips64::GetRegisterSetCount()
 172 {
 173     size_t sets = 0;
 174     for (size_t set = 0; set < k_num_register_sets; ++set)
 175     {
 176         if (IsRegisterSetAvailable(set))
 177             ++sets;
 178     }
 179
 180     return sets;
 181 }
 182
 183 const RegisterSet *
 184 RegisterContextPOSIX_mips64::GetRegisterSet(size_t set)
 185 {
 186     if (IsRegisterSetAvailable(set))
 187         return &g_reg_sets_mips64[set];
 188     else
 189         return NULL;
 190 }
 191
 192 const char *
 193 RegisterContextPOSIX_mips64::GetRegisterName(unsigned reg)
 194 {
 195     assert(reg < k_num_registers_mips64 && "Invalid register offset.");
 196     return GetRegisterInfo()[reg].name;
 197 }
 198
 199 lldb::ByteOrder
 200 RegisterContextPOSIX_mips64::GetByteOrder()
 201 {
 202     // Get the target process whose privileged thread was used for the register read.
 203     lldb::ByteOrder byte_order = eByteOrderInvalid;
 204     Process *process = CalculateProcess().get();
 205
 206     if (process)
 207         byte_order = process->GetByteOrder();
 208     return byte_order;
 209 }
 210
 211 bool
 212 RegisterContextPOSIX_mips64::IsRegisterSetAvailable(size_t set_index)
 213 {
 214     size_t num_sets = k_num_register_sets;
 215
 216     return (set_index < num_sets);
 217 }
 218
 219 // Used when parsing DWARF and EH frame information and any other
 220 // object file sections that contain register numbers in them.
 221 uint32_t
 222 RegisterContextPOSIX_mips64::ConvertRegisterKindToRegisterNumber(uint32_t kind,
 223                                                                  uint32_t num)
 224 {
 225     const uint32_t num_regs = GetRegisterCount();
 226
 227     assert (kind < kNumRegisterKinds);
 228     for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx)
 229     {
 230         const RegisterInfo *reg_info = GetRegisterInfoAtIndex (reg_idx);
 231
 232         if (reg_info->kinds[kind] == num)
 233             return reg_idx;
 234     }
 235
 236     return LLDB_INVALID_REGNUM;
 237 }
 238