riscv/interactive.cc

   1 // See LICENSE for license details.
   2
   3 #include "sim.h"
   4 #include "htif.h"
   5 #include <sys/mman.h>
   6 #include <map>
   7 #include <iostream>
   8 #include <climits>
   9 #include <cinttypes>
  10 #include <assert.h>
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13 #include <sstream>
  14 #include <string>
  15 #include <vector>
  16
  17 static std::string readline()
  18 {
  19   std::string s;
  20   while (1)
  21   {
  22     char ch;
  23     assert(read(1, &ch, 1) == 1);
  24
  25     if (ch == '\x7f')
  26     {
  27       if (s.empty())
  28         continue;
  29       s.erase(s.end()-1);
  30     }
  31
  32     assert(write(1, &ch, 1) == 1);
  33     if (ch == '\n')
  34       return s;
  35     if (ch != '\x7f')
  36       s += ch;
  37   }
  38 }
  39
  40 void sim_t::interactive()
  41 {
  42   std::cout << ": " << std::flush;
  43   std::string s = readline();
  44
  45   std::stringstream ss(s);
  46   std::string cmd, tmp;
  47   std::vector<std::string> args;
  48   if (!(ss >> cmd))
  49   {
  50     interactive_run_noisy(std::string("r"), std::vector<std::string>(1,"1"));
  51     return;
  52   }
  53   while (ss >> tmp)
  54     args.push_back(tmp);
  55
  56   typedef void (sim_t::*interactive_func)(const std::string&, const std::vector<std::string>&);
  57   std::map<std::string,interactive_func> funcs;
  58
  59   funcs["r"] = &sim_t::interactive_run_noisy;
  60   funcs["rs"] = &sim_t::interactive_run_silent;
  61   funcs["reg"] = &sim_t::interactive_reg;
  62   funcs["fregs"] = &sim_t::interactive_fregs;
  63   funcs["fregd"] = &sim_t::interactive_fregd;
  64   funcs["mem"] = &sim_t::interactive_mem;
  65   funcs["str"] = &sim_t::interactive_str;
  66   funcs["until"] = &sim_t::interactive_until;
  67   funcs["while"] = &sim_t::interactive_until;
  68   funcs["q"] = &sim_t::interactive_quit;
  69
  70   try
  71   {
  72     if(funcs.count(cmd))
  73       (this->*funcs[cmd])(cmd, args);
  74   }
  75   catch(trap_t t) {}
  76 }
  77
  78 void sim_t::interactive_run_noisy(const std::string& cmd, const std::vector<std::string>& args)
  79 {
  80   interactive_run(cmd,args,true);
  81 }
  82
  83 void sim_t::interactive_run_silent(const std::string& cmd, const std::vector<std::string>& args)
  84 {
  85   interactive_run(cmd,args,false);
  86 }
  87
  88 void sim_t::interactive_run(const std::string& cmd, const std::vector<std::string>& args, bool noisy)
  89 {
  90   size_t steps = args.size() ? atoll(args[0].c_str()) : -1;
  91   step(steps, noisy);
  92 }
  93
  94 void sim_t::interactive_quit(const std::string& cmd, const std::vector<std::string>& args)
  95 {
  96   stop();
  97 }
  98
  99 reg_t sim_t::get_pc(const std::vector<std::string>& args)
 100 {
 101   if(args.size() != 1)
 102     throw trap_illegal_instruction;
 103
 104   int p = atoi(args[0].c_str());
 105   if(p >= (int)num_cores())
 106     throw trap_illegal_instruction;
 107
 108   return procs[p]->pc;
 109 }
 110
 111 reg_t sim_t::get_reg(const std::vector<std::string>& args)
 112 {
 113   if(args.size() != 2)
 114     throw trap_illegal_instruction;
 115
 116   int p = atoi(args[0].c_str());
 117   int r = atoi(args[1].c_str());
 118   if(p >= (int)num_cores() || r >= NXPR)
 119     throw trap_illegal_instruction;
 120
 121   return procs[p]->XPR[r];
 122 }
 123
 124 reg_t sim_t::get_freg(const std::vector<std::string>& args)
 125 {
 126   if(args.size() != 2)
 127     throw trap_illegal_instruction;
 128
 129   int p = atoi(args[0].c_str());
 130   int r = atoi(args[1].c_str());
 131   if(p >= (int)num_cores() || r >= NFPR)
 132     throw trap_illegal_instruction;
 133
 134   return procs[p]->FPR[r];
 135 }
 136
 137 void sim_t::interactive_reg(const std::string& cmd, const std::vector<std::string>& args)
 138 {
 139   printf("0x%016" PRIx64 "\n", get_reg(args));
 140 }
 141
 142 union fpr
 143 {
 144   reg_t r;
 145   float s;
 146   double d;
 147 };
 148
 149 void sim_t::interactive_fregs(const std::string& cmd, const std::vector<std::string>& args)
 150 {
 151   fpr f;
 152   f.r = get_freg(args);
 153   printf("%g\n",f.s);
 154 }
 155
 156 void sim_t::interactive_fregd(const std::string& cmd, const std::vector<std::string>& args)
 157 {
 158   fpr f;
 159   f.r = get_freg(args);
 160   printf("%g\n",f.d);
 161 }
 162
 163 reg_t sim_t::get_mem(const std::vector<std::string>& args)
 164 {
 165   if(args.size() != 1 && args.size() != 2)
 166     throw trap_illegal_instruction;
 167
 168   std::string addr_str = args[0];
 169   if(args.size() == 2)
 170   {
 171     int p = atoi(args[0].c_str());
 172     if(p >= (int)num_cores())
 173       throw trap_illegal_instruction;
 174     mmu->set_sr(procs[p]->sr);
 175     mmu->set_ptbr(procs[p]->mmu.get_ptbr());
 176     addr_str = args[1];
 177   }
 178
 179   reg_t addr = strtol(addr_str.c_str(),NULL,16), val;
 180   if(addr == LONG_MAX)
 181     addr = strtoul(addr_str.c_str(),NULL,16);
 182
 183   switch(addr % 8)
 184   {
 185     case 0:
 186       val = mmu->load_uint64(addr);
 187       break;
 188     case 4:
 189       val = mmu->load_uint32(addr);
 190       break;
 191     case 2:
 192     case 6:
 193       val = mmu->load_uint16(addr);
 194       break;
 195     default:
 196       val = mmu->load_uint8(addr);
 197       break;
 198   }
 199   return val;
 200 }
 201
 202 void sim_t::interactive_mem(const std::string& cmd, const std::vector<std::string>& args)
 203 {
 204   printf("0x%016" PRIx64 "\n", get_mem(args));
 205 }
 206
 207 void sim_t::interactive_str(const std::string& cmd, const std::vector<std::string>& args)
 208 {
 209   if(args.size() != 1)
 210     throw trap_illegal_instruction;
 211
 212   reg_t addr = strtol(args[0].c_str(),NULL,16);
 213
 214   char ch;
 215   while((ch = mmu->load_uint8(addr++)))
 216     putchar(ch);
 217
 218   putchar('\n');
 219 }
 220
 221 void sim_t::interactive_until(const std::string& cmd, const std::vector<std::string>& args)
 222 {
 223   if(args.size() < 3)
 224     return;
 225
 226   std::string scmd = args[0];
 227   reg_t val = strtol(args[args.size()-1].c_str(),NULL,16);
 228   if(val == LONG_MAX)
 229     val = strtoul(args[args.size()-1].c_str(),NULL,16);
 230
 231   std::vector<std::string> args2;
 232   args2 = std::vector<std::string>(args.begin()+1,args.end()-1);
 233
 234   while (1)
 235   {
 236     reg_t current;
 237     if(scmd == "reg")
 238       current = get_reg(args2);
 239     else if(scmd == "pc")
 240       current = get_pc(args2);
 241     else if(scmd == "mem")
 242       current = get_mem(args2);
 243     else
 244       return;
 245
 246     if(cmd == "until" && current == val)
 247       break;
 248     if(cmd == "while" && current != val)
 249       break;
 250
 251     step(1, false);
 252   }
 253 }