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/Host/Endian.h"
  19 #include "lldb/Target/Target.h"
  20 #include "lldb/Target/Thread.h"
  21 #include "llvm/Support/Compiler.h"
  22
  23 #include "Plugins/Process/elf-core/ProcessElfCore.h"
  24 #include "RegisterContextPOSIX_mips64.h"
  25
  26 using namespace lldb_private;
  27 using namespace lldb;
  28
  29 static const uint32_t g_gpr_regnums[] = {
  30     gpr_zero_mips64,  gpr_r1_mips64,    gpr_r2_mips64,    gpr_r3_mips64,
  31     gpr_r4_mips64,    gpr_r5_mips64,    gpr_r6_mips64,    gpr_r7_mips64,
  32     gpr_r8_mips64,    gpr_r9_mips64,    gpr_r10_mips64,   gpr_r11_mips64,
  33     gpr_r12_mips64,   gpr_r13_mips64,   gpr_r14_mips64,   gpr_r15_mips64,
  34     gpr_r16_mips64,   gpr_r17_mips64,   gpr_r18_mips64,   gpr_r19_mips64,
  35     gpr_r20_mips64,   gpr_r21_mips64,   gpr_r22_mips64,   gpr_r23_mips64,
  36     gpr_r24_mips64,   gpr_r25_mips64,   gpr_r26_mips64,   gpr_r27_mips64,
  37     gpr_gp_mips64,    gpr_sp_mips64,    gpr_r30_mips64,   gpr_ra_mips64,
  38     gpr_sr_mips64,    gpr_mullo_mips64, gpr_mulhi_mips64, gpr_badvaddr_mips64,
  39     gpr_cause_mips64, gpr_pc_mips64,    gpr_ic_mips64,    gpr_dummy_mips64};
  40
  41 // Number of register sets provided by this context.
  42 enum { k_num_register_sets = 1 };
  43
  44 static const RegisterSet g_reg_sets_mips64[k_num_register_sets] = {
  45     {"General Purpose Registers", "gpr", k_num_gpr_registers_mips64,
  46      g_gpr_regnums},
  47 };
  48
  49 bool RegisterContextPOSIX_mips64::IsGPR(unsigned reg) {
  50   return reg <= k_num_gpr_registers_mips64; // GPR's come first.
  51 }
  52
  53 bool RegisterContextPOSIX_mips64::IsFPR(unsigned reg) {
  54   // XXX
  55   return false;
  56 }
  57
  58 RegisterContextPOSIX_mips64::RegisterContextPOSIX_mips64(
  59     Thread &thread, uint32_t concrete_frame_idx,
  60     RegisterInfoInterface *register_info)
  61     : RegisterContext(thread, concrete_frame_idx) {
  62   m_register_info_ap.reset(register_info);
  63
  64   // elf-core yet to support ReadFPR()
  65   ProcessSP base = CalculateProcess();
  66   if (base.get()->GetPluginName() == ProcessElfCore::GetPluginNameStatic())
  67     return;
  68 }
  69
  70 RegisterContextPOSIX_mips64::~RegisterContextPOSIX_mips64() {}
  71
  72 void RegisterContextPOSIX_mips64::Invalidate() {}
  73
  74 void RegisterContextPOSIX_mips64::InvalidateAllRegisters() {}
  75
  76 unsigned RegisterContextPOSIX_mips64::GetRegisterOffset(unsigned reg) {
  77   assert(reg < k_num_registers_mips64 && "Invalid register number.");
  78   return GetRegisterInfo()[reg].byte_offset;
  79 }
  80
  81 unsigned RegisterContextPOSIX_mips64::GetRegisterSize(unsigned reg) {
  82   assert(reg < k_num_registers_mips64 && "Invalid register number.");
  83   return GetRegisterInfo()[reg].byte_size;
  84 }
  85
  86 size_t RegisterContextPOSIX_mips64::GetRegisterCount() {
  87   size_t num_registers = k_num_registers_mips64;
  88   return num_registers;
  89 }
  90
  91 size_t RegisterContextPOSIX_mips64::GetGPRSize() {
  92   return m_register_info_ap->GetGPRSize();
  93 }
  94
  95 const RegisterInfo *RegisterContextPOSIX_mips64::GetRegisterInfo() {
  96   // Commonly, this method is overridden and g_register_infos is copied and
  97   // specialized.
  98   // So, use GetRegisterInfo() rather than g_register_infos in this scope.
  99   return m_register_info_ap->GetRegisterInfo();
 100 }
 101
 102 const RegisterInfo *
 103 RegisterContextPOSIX_mips64::GetRegisterInfoAtIndex(size_t reg) {
 104   if (reg < k_num_registers_mips64)
 105     return &GetRegisterInfo()[reg];
 106   else
 107     return NULL;
 108 }
 109
 110 size_t RegisterContextPOSIX_mips64::GetRegisterSetCount() {
 111   size_t sets = 0;
 112   for (size_t set = 0; set < k_num_register_sets; ++set) {
 113     if (IsRegisterSetAvailable(set))
 114       ++sets;
 115   }
 116
 117   return sets;
 118 }
 119
 120 const RegisterSet *RegisterContextPOSIX_mips64::GetRegisterSet(size_t set) {
 121   if (IsRegisterSetAvailable(set))
 122     return &g_reg_sets_mips64[set];
 123   else
 124     return NULL;
 125 }
 126
 127 const char *RegisterContextPOSIX_mips64::GetRegisterName(unsigned reg) {
 128   assert(reg < k_num_registers_mips64 && "Invalid register offset.");
 129   return GetRegisterInfo()[reg].name;
 130 }
 131
 132 lldb::ByteOrder RegisterContextPOSIX_mips64::GetByteOrder() {
 133   // Get the target process whose privileged thread was used for the register
 134   // read.
 135   lldb::ByteOrder byte_order = eByteOrderInvalid;
 136   Process *process = CalculateProcess().get();
 137
 138   if (process)
 139     byte_order = process->GetByteOrder();
 140   return byte_order;
 141 }
 142
 143 bool RegisterContextPOSIX_mips64::IsRegisterSetAvailable(size_t set_index) {
 144   size_t num_sets = k_num_register_sets;
 145
 146   return (set_index < num_sets);
 147 }
 148
 149 // Used when parsing DWARF and EH frame information and any other
 150 // object file sections that contain register numbers in them.
 151 uint32_t RegisterContextPOSIX_mips64::ConvertRegisterKindToRegisterNumber(
 152     lldb::RegisterKind kind, uint32_t num) {
 153   const uint32_t num_regs = GetRegisterCount();
 154
 155   assert(kind < kNumRegisterKinds);
 156   for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx) {
 157     const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg_idx);
 158
 159     if (reg_info->kinds[kind] == num)
 160       return reg_idx;
 161   }
 162
 163   return LLDB_INVALID_REGNUM;
 164 }