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