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whisper.cpp
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//
// SPDX-License-Identifier: GPL-3.0-or-later
// Copyright 2018 Western Digital Corporation or its affiliates.
//
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along with
// this program. If not, see <https://www.gnu.org/licenses/>.
//
#include <iostream>
#include <fstream>
#include <sstream>
#include <thread>
#include <experimental/filesystem>
#include <boost/program_options.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/format.hpp>
#ifdef __MINGW64__
#include <winsock2.h>
typedef int socklen_t;
#define close(s) closesocket((s))
#define setlinebuf(f) setvbuf((f),NULL,_IOLBF,0)
#define strerror_r(a,b,c) strerror((a))
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#endif
#include <csignal>
#include "HartConfig.hpp"
#include "WhisperMessage.h"
#include "Hart.hpp"
#include "Server.hpp"
#include "Interactive.hpp"
using namespace WdRiscv;
/// Return format string suitable for printing an integer of type URV
/// in hexadecimal form.
template <typename URV>
static
const char*
getHexForm()
{
if (sizeof(URV) == 4)
return "0x%08x";
if (sizeof(URV) == 8)
return "0x%016x";
if (sizeof(URV) == 16)
return "0x%032x";
return "0x%x";
}
/// Convert the command line string numberStr to a number using
/// strotull and a base of zero (prefixes 0 and 0x are
/// honored). Return true on success and false on failure (string does
/// not represent a number). TYPE is an integer type (e.g
/// uint32_t). Option is the command line option associated with the
/// string and is used for diagnostic messages.
template <typename TYPE>
static
bool
parseCmdLineNumber(const std::string& option,
const std::string& numberStr,
TYPE& number)
{
std::string str = numberStr;
bool good = not str.empty();
uint64_t scale = 1;
if (good)
{
char suffix = str.back();
if (suffix == 'k')
scale = 1024;
else if (suffix == 'm')
scale = 1024*1024;
else if (suffix == 'g')
scale = 1024*1024*1024;
if (scale != 1)
{
str = str.substr(0, str.length() - 1);
if (str.empty())
good = false;
}
}
if (good)
{
typedef typename std::make_signed_t<TYPE> STYPE;
char* end = nullptr;
bool bad = false;
if (std::is_same<TYPE, STYPE>::value)
{
int64_t val = strtoll(str.c_str(), &end, 0) * scale;
number = static_cast<TYPE>(val);
bad = val != number;
}
else
{
uint64_t val = strtoull(str.c_str(), &end, 0) * scale;
number = static_cast<TYPE>(val);
bad = val != number;
}
if (bad)
{
std::cerr << "parseCmdLineNumber: Number too large: " << numberStr
<< '\n';
return false;
}
if (end and *end)
good = false; // Part of the string are non parseable.
}
if (not good)
std::cerr << "Invalid command line " << option << " value: " << numberStr
<< '\n';
return good;
}
/// Aapter for the parseCmdLineNumber for optionals.
template <typename TYPE>
static
bool
parseCmdLineNumber(const std::string& option,
const std::string& numberStr,
std::optional<TYPE>& number)
{
TYPE n;
if (not parseCmdLineNumber(option, numberStr, n))
return false;
number = n;
return true;
}
typedef std::vector<std::string> StringVec;
/// Hold values provided on the command line.
struct Args
{
StringVec hexFiles; // Hex files to be loaded into simulator memory.
std::string traceFile; // Log of state change after each instruction.
std::string commandLogFile; // Log of interactive or socket commands.
std::string consoleOutFile; // Console io output file.
std::string serverFile; // File in which to write server host and port.
std::string instFreqFile; // Instruction frequency file.
std::string configFile; // Configuration (JSON) file.
std::string isa;
std::string snapshotDir = "snapshot"; // Dir prefix for saving snapshots
std::string loadFrom; // Directory for loading a snapshot
std::string stdoutFile; // Redirect target program stdout to this.
std::string stderrFile; // Redirect target program stderr to this.
StringVec zisa;
StringVec regInits; // Initial values of regs
StringVec targets; // Target (ELF file) programs and associated
// program options to be loaded into simulator
// memory. Each target plus args is one string.
std::string targetSep = " "; // Target program argument separator.
std::optional<std::string> toHostSym;
std::optional<std::string> consoleIoSym;
// Ith item is a vector of strings representing ith target and its args.
std::vector<StringVec> expandedTargets;
std::optional<uint64_t> startPc;
std::optional<uint64_t> endPc;
std::optional<uint64_t> toHost;
std::optional<uint64_t> consoleIo;
std::optional<uint64_t> instCountLim;
std::optional<uint64_t> memorySize;
std::optional<uint64_t> snapshotPeriod;
std::optional<uint64_t> alarmInterval;
unsigned regWidth = 32;
unsigned harts = 1;
unsigned pageSize = 4*1024;
bool help = false;
bool hasRegWidth = false;
bool trace = false;
bool interactive = false;
bool verbose = false;
bool version = false;
bool traceLdSt = false; // Trace ld/st data address if true.
bool triggers = false; // Enable debug triggers when true.
bool counters = false; // Enable performance counters when true.
bool gdb = false; // Enable gdb mode when true.
int gdbTcpPort = -1; // Enable gdb mode over TCP when port is positive.
bool abiNames = false; // Use ABI register names in inst disassembly.
bool newlib = false; // True if target program linked with newlib.
bool linux = false; // True if target program linked with Linux C-lib.
bool raw = false; // True if bare-metal program (no linux no newlib).
bool fastExt = false; // True if fast external interrupt dispatch enabled.
bool unmappedElfOk = false;
// Expand each target program string into program name and args.
void expandTargets();
};
void
Args::expandTargets()
{
this->expandedTargets.clear();
for (const auto& target : this->targets)
{
StringVec tokens;
boost::split(tokens, target, boost::is_any_of(this->targetSep),
boost::token_compress_on);
this->expandedTargets.push_back(tokens);
}
}
static
void
printVersion()
{
unsigned version = 1;
unsigned subversion = 463;
std::cout << "Version " << version << "." << subversion << " compiled on "
<< __DATE__ << " at " << __TIME__ << '\n';
}
static
bool
collectCommandLineValues(const boost::program_options::variables_map& varMap,
Args& args)
{
bool ok = true;
if (varMap.count("startpc"))
{
auto numStr = varMap["startpc"].as<std::string>();
if (not parseCmdLineNumber("startpc", numStr, args.startPc))
ok = false;
}
if (varMap.count("endpc"))
{
auto numStr = varMap["endpc"].as<std::string>();
if (not parseCmdLineNumber("endpc", numStr, args.endPc))
ok = false;
}
if (varMap.count("tohost"))
{
auto numStr = varMap["tohost"].as<std::string>();
if (not parseCmdLineNumber("tohost", numStr, args.toHost))
ok = false;
}
if (varMap.count("consoleio"))
{
auto numStr = varMap["consoleio"].as<std::string>();
if (not parseCmdLineNumber("consoleio", numStr, args.consoleIo))
ok = false;
}
if (varMap.count("maxinst"))
{
auto numStr = varMap["maxinst"].as<std::string>();
if (not parseCmdLineNumber("maxinst", numStr, args.instCountLim))
ok = false;
}
if (varMap.count("memorysize"))
{
auto numStr = varMap["memorysize"].as<std::string>();
if (not parseCmdLineNumber("memorysize", numStr, args.memorySize))
ok = false;
else
{
size_t size = *args.memorySize;
if (size < 4096)
{
std::cerr << "Memory size (" << size << ") too small: Using 4096\n";
size = 4096;
}
else if ((size % 4096) != 0)
{
size_t newSize = (size / 4096) * 4096;
if (newSize == 0)
newSize = 4096;
std::cerr << "Memory size (" << size << ") not a multiple of 4096: "
<< "Using " << newSize << '\n';
*args.memorySize = newSize;
}
}
}
if (varMap.count("snapshotperiod"))
{
auto numStr = varMap["snapshotperiod"].as<std::string>();
if (not parseCmdLineNumber("snapshotperiod", numStr, args.snapshotPeriod))
ok = false;
else if (*args.snapshotPeriod == 0)
std::cerr << "Warning: Zero snapshot period ignored.\n";
}
if (varMap.count("tohostsym"))
args.toHostSym = varMap["tohostsym"].as<std::string>();
if (varMap.count("consoleiosym"))
args.consoleIoSym = varMap["consoleiosym"].as<std::string>();
if (varMap.count("xlen"))
args.hasRegWidth = true;
if (varMap.count("alarm"))
{
auto numStr = varMap["alarm"].as<std::string>();
if (not parseCmdLineNumber("alarm", numStr, args.alarmInterval))
ok = false;
else if (*args.alarmInterval == 0)
std::cerr << "Warning: Zero alarm period ignored.\n";
}
if (args.interactive)
args.trace = true; // Enable instruction tracing in interactive mode.
return ok;
}
/// Parse command line arguments. Place option values in args.
/// Return true on success and false on failure. Exists program
/// if --help is used.
static
bool
parseCmdLineArgs(int argc, char* argv[], Args& args)
{
try
{
// Define command line options.
namespace po = boost::program_options;
po::options_description desc("options");
desc.add_options()
("help,h", po::bool_switch(&args.help),
"Produce this message.")
("log,l", po::bool_switch(&args.trace),
"Enable tracing to standard output of executed instructions.")
("isa", po::value(&args.isa),
"Specify instruction set extensions to enable. Supported extensions "
"are a, c, d, f, i, m, s and u. Default is imc.")
("zisa", po::value(&args.zisa)->multitoken(),
"Specify instruction set z-extension to enable. Only z-extensions "
"currently supported are zbb and zbs (Exammple --zisa zbb)")
("xlen", po::value(&args.regWidth),
"Specify register width (32 or 64), defaults to 32")
("harts", po::value(&args.harts),
"Specify number of hardware threads.")
("pagesize", po::value(&args.pageSize),
"Specify memory page size.")
("target,t", po::value(&args.targets)->multitoken(),
"Target program (ELF file) to load into simulator memory. In "
"newlib/Linux emulation mode, program options may follow program name.")
("targetsep", po::value(&args.targetSep),
"Target program argument separator.")
("hex,x", po::value(&args.hexFiles)->multitoken(),
"HEX file to load into simulator memory.")
("logfile,f", po::value(&args.traceFile),
"Enable tracing to given file of executed instructions.")
("consoleoutfile", po::value(&args.consoleOutFile),
"Redirect console output to given file.")
("commandlog", po::value(&args.commandLogFile),
"Enable logging of interactive/socket commands to the given file.")
("server", po::value(&args.serverFile),
"Interactive server mode. Put server hostname and port in file.")
("startpc,s", po::value<std::string>(),
"Set program entry point. If not specified, use entry point of the "
"most recently loaded ELF file.")
("endpc,e", po::value<std::string>(),
"Set stop program counter. Simulator will stop once instruction at "
"the stop program counter is executed.")
("tohost", po::value<std::string>(),
"Memory address to which a write stops simulator.")
("tohostsym", po::value<std::string>(),
"ELF symbol to use for setting tohost from ELF file (in the case "
"where tohost is not specified on the command line). Default: "
"\"tohost\".")
("consoleio", po::value<std::string>(),
"Memory address corresponding to console io. Reading/writing "
"(lw/lh/lb sw/sh/sb) from given address reads/writes a byte from the "
"console.")
("consoleiosym", po::value<std::string>(),
"ELF symbol to use as console-io address (in the case where "
"consoleio is not specified on the command line). Deafult: "
"\"__whisper_console_io\".")
("maxinst,m", po::value<std::string>(),
"Limit executed instruction count to limit.")
("memorysize", po::value<std::string>(),
"Memory size (must be a multiple of 4096).")
("interactive,i", po::bool_switch(&args.interactive),
"Enable interactive mode.")
("traceload", po::bool_switch(&args.traceLdSt),
"Enable tracing of load/store instruction data address.")
("triggers", po::bool_switch(&args.triggers),
"Enable debug triggers (triggers are on in interactive and server modes)")
("counters", po::bool_switch(&args.counters),
"Enable performance counters")
("gdb", po::bool_switch(&args.gdb),
"Run in gdb mode enabling remote debugging from gdb.")
("gdb-tcp-port", po::value(&args.gdbTcpPort),
"TCP port number for gdb; If port num is negative,"
" gdb will work with stdio (default -1).")
("profileinst", po::value(&args.instFreqFile),
"Report instruction frequency to file.")
("setreg", po::value(&args.regInits)->multitoken(),
"Initialize registers. Apply to all harts unless specific prefix "
"present (hart is 1 in 1:x3=0xabc). Example: --setreg x1=4 x2=0xff "
"1:x3=0xabc")
("configfile", po::value(&args.configFile),
"Configuration file (JSON file defining system features).")
("snapshotdir", po::value(&args.snapshotDir),
"Directory prefix for saving snapshots.")
("snapshotperiod", po::value<std::string>(),
"Snapshot period: Save snapshot using snapshotdir every so many instructions.")
("loadfrom", po::value(&args.loadFrom),
"Snapshot directory from which to restore a previously saved (snapshot) state.")
("stdout", po::value(&args.stdoutFile),
"Redirect standard output of newlib/Linux target program to this.")
("stderr", po::value(&args.stderrFile),
"Redirect standard error of newlib/Linux target program to this.")
("abinames", po::bool_switch(&args.abiNames),
"Use ABI register names (e.g. sp instead of x2) in instruction disassembly.")
("newlib", po::bool_switch(&args.newlib),
"Emulate (some) newlib system calls. Done automatically if newlib "
"symbols are detected in the target ELF file.")
("linux", po::bool_switch(&args.linux),
"Emulate (some) Linux system calls. Done automatically if Linux "
"symbols are detected in the target ELF file.")
("raw", po::bool_switch(&args.raw),
"Bare metal mode: Disble emulation of Linux/newlib system call emulation "
"even if Linux/newlib symbols detected in the target ELF file.")
("fastext", po::bool_switch(&args.fastExt),
"Enable fast external interrupt dispatch.")
("unmappedelfok", po::bool_switch(&args.unmappedElfOk),
"Enable checking fast external interrupt dispatch.")
("alarm", po::value<std::string>(),
"External interrupt period in micro-seconds: Convert arg to an "
"instruction count, n, assuming a 1ghz clock, and force an external "
" interrupt every n instructions. No-op if arg is zero.")
("verbose,v", po::bool_switch(&args.verbose),
"Be verbose.")
("version", po::bool_switch(&args.version),
"Print version.");
// Define positional options.
po::positional_options_description pdesc;
pdesc.add("target", -1);
// Parse command line options.
po::variables_map varMap;
po::command_line_parser parser(argc, argv);
auto parsed = parser.options(desc).positional(pdesc).allow_unregistered().run();
po::store(parsed, varMap);
po::notify(varMap);
// auto unparsed = po::collect_unrecognized(parsed.options, po::include_positional);
if (args.version)
printVersion();
if (args.help)
{
std::cout <<
"Simulate a RISCV system running the program specified by the given ELF\n"
"and/or HEX file. With --newlib/--linux, the ELF file is a newlib/linux linked\n"
"program and may be followed by corresponding command line arguments.\n"
"All numeric arguments are interpreted as hexadecimal numbers when prefixed"
" with 0x."
"Examples:\n"
" whisper --target prog --log\n"
" whisper --target prog --setreg sp=0xffffff00\n"
" whisper --newlib --log --target \"prog -x -y\"\n"
" whisper --linux --log --targetsep ':' --target \"prog:-x:-y\"\n\n";
std::cout << desc;
return true;
}
if (not collectCommandLineValues(varMap, args))
return false;
}
catch (std::exception& exp)
{
std::cerr << "Failed to parse command line args: " << exp.what() << '\n';
return false;
}
return true;
}
/// Apply register initializations specified on the command line.
template<typename URV>
static
bool
applyCmdLineRegInit(const Args& args, Hart<URV>& hart)
{
bool ok = true;
URV hartId = hart.localHartId();
for (const auto& regInit : args.regInits)
{
// Each register initialization is a string of the form reg=val
// or hart:reg=val
std::vector<std::string> tokens;
boost::split(tokens, regInit, boost::is_any_of("="),
boost::token_compress_on);
if (tokens.size() != 2)
{
std::cerr << "Invalid command line register initialization: "
<< regInit << '\n';
ok = false;
continue;
}
std::string regName = tokens.at(0);
const std::string& regVal = tokens.at(1);
bool specificHart = false;
unsigned id = 0;
size_t colonIx = regName.find(':');
if (colonIx != std::string::npos)
{
std::string hartStr = regName.substr(0, colonIx);
regName = regName.substr(colonIx + 1);
if (not parseCmdLineNumber("hart", hartStr, id))
{
std::cerr << "Invalid command line register initialization: "
<< regInit << '\n';
ok = false;
continue;
}
specificHart = true;
}
URV val = 0;
if (not parseCmdLineNumber("register", regVal, val))
{
ok = false;
continue;
}
if (specificHart and id != hartId)
continue;
if (unsigned reg = 0; hart.findIntReg(regName, reg))
{
if (args.verbose)
std::cerr << "Setting register " << regName << " to command line "
<< "value 0x" << std::hex << val << std::dec << '\n';
hart.pokeIntReg(reg, val);
continue;
}
if (unsigned reg = 0; hart.findFpReg(regName, reg))
{
if (args.verbose)
std::cerr << "Setting register " << regName << " to command line "
<< "value 0x" << std::hex << val << std::dec << '\n';
hart.pokeFpReg(reg, val);
continue;
}
auto csr = hart.findCsr(regName);
if (csr)
{
if (args.verbose)
std::cerr << "Setting register " << regName << " to command line "
<< "value 0x" << std::hex << val << std::dec << '\n';
hart.pokeCsr(csr->getNumber(), val);
continue;
}
std::cerr << "No such RISCV register: " << regName << '\n';
ok = false;
}
return ok;
}
template<typename URV>
static
bool
applyZisaStrings(const std::vector<std::string>& zisa, Hart<URV>& hart)
{
unsigned errors = 0;
for (const auto& ext : zisa)
{
if (ext == "zbb" or ext == "ba")
hart.enableRvzba(true);
else if (ext == "zbb" or ext == "bb")
hart.enableRvzbb(true);
else if (ext == "zbc" or ext == "bc")
hart.enableRvzbc(true);
else if (ext == "zbe" or ext == "be")
hart.enableRvzbe(true);
else if (ext == "zbf" or ext == "bf")
hart.enableRvzbf(true);
else if (ext == "zbs" or ext == "bs")
hart.enableRvzbs(true);
else if (ext == "zbmini" or ext == "bmini")
{
hart.enableRvzbb(true);
hart.enableRvzbs(true);
std::cerr << "ISA option zbmini is deprecated. Using zbb and zbs.\n";
}
else
{
std::cerr << "No such Z extension: " << ext << '\n';
errors++;
}
}
return errors == 0;
}
template<typename URV>
static
bool
applyIsaString(const std::string& isaStr, Hart<URV>& hart)
{
URV isa = 0;
unsigned errors = 0;
for (auto c : isaStr)
{
switch(c)
{
case 'a':
case 'c':
case 'd':
case 'f':
case 'i':
case 'm':
case 'u':
case 's':
isa |= URV(1) << (c - 'a');
break;
default:
std::cerr << "Extension \"" << c << "\" is not supported.\n";
errors++;
break;
}
}
if (not (isa & (URV(1) << ('i' - 'a'))))
{
std::cerr << "Extension \"i\" implicitly enabled\n";
isa |= URV(1) << ('i' - 'a');
}
if (isa & (URV(1) << ('d' - 'a')))
if (not (isa & (URV(1) << ('f' - 'a'))))
{
std::cerr << "Extension \"d\" requires \"f\" -- Enabling \"f\"\n";
isa |= URV(1) << ('f' - 'a');
}
// Set the xlen bits: 1 for 32-bits and 2 for 64.
URV xlen = sizeof(URV) == 4? 1 : 2;
isa |= xlen << (8*sizeof(URV) - 2);
bool resetMemoryMappedRegs = false;
URV mask = 0, pokeMask = 0;
bool implemented = true, isDebug = false, shared = true;
if (not hart.configCsr("misa", implemented, isa, mask, pokeMask, isDebug,
shared))
{
std::cerr << "Failed to configure MISA CSR\n";
errors++;
}
else
hart.reset(resetMemoryMappedRegs); // Apply effects of new misa value.
return errors == 0;
}
/// Enable linux or newlib based on the symbols in the ELF files.
/// Return true if either is enabled.
template<typename URV>
static
bool
enableNewlibOrLinuxFromElf(const Args& args, Hart<URV>& hart, std::string& isa)
{
bool newlib = args.newlib, linux = args.linux;
if (args.raw)
{
if (newlib or linux)
std::cerr << "Raw mode not comptible with newlib/linux. Sticking"
<< " with raw mode.\n";
return false;
}
if (linux or newlib)
; // Emulation preference already set by user.
else
{
// At this point ELF files have not been loaded: Cannot use
// hart.findElfSymbol.
for (auto target : args.expandedTargets)
{
auto elfPath = target.at(0);
if (not linux)
linux = Memory::isSymbolInElfFile(elfPath, "__libc_csu_init");
if (not newlib)
newlib = Memory::isSymbolInElfFile(elfPath, "__call_exitprocs");
}
if (args.verbose and linux)
std::cerr << "Deteced linux symbol in ELF\n";
if (args.verbose and newlib)
std::cerr << "Deteced newlib symbol in ELF\n";
if (newlib and linux)
{
std::cerr << "Fishy: Both newlib and linux symbols present in "
<< "ELF file(s). Doing linux emulation.\n";
newlib = false;
}
}
hart.enableNewlib(newlib);
hart.enableLinux(linux);
if (newlib or linux)
{
// Enable c, a, f, and d extensions for newlib/linux
if (isa.empty())
{
if (args.verbose)
std::cerr << "Enabling a/f/d ISA extensions for newlib/linux\n";
isa = "icmafd";
}
return true;
}
return false;
}
/// Set stack pointer to a reasonable value for linux/newlib.
template<typename URV>
static
void
sanitizeStackPointer(Hart<URV>& hart, bool verbose)
{
// Set stack pointer to the 128 bytes below end of memory.
size_t memSize = hart.getMemorySize();
if (memSize > 128)
{
size_t spValue = memSize - 128;
if (verbose)
std::cerr << "Setting stack pointer to 0x" << std::hex << spValue
<< std::dec << " for newlib/linux\n";
hart.pokeIntReg(IntRegNumber::RegSp, spValue);
}
}
/// Load register and memory state from snapshot previously saved
/// in the given directory. Return true on success and false on
/// failure.
template <typename URV>
static
bool
loadSnapshot(Hart<URV>& hart, const std::string& snapDir)
{
using std::cerr;
using namespace std::experimental;
if (not filesystem::is_directory(snapDir))
{
cerr << "Error: Path is not a snapshot directory: " << snapDir << '\n';
return false;
}
filesystem::path path(snapDir);
filesystem::path regPath = path / "registers";
if (not filesystem::is_regular_file(regPath))
{
cerr << "Error: Snapshot file does not exists: " << regPath << '\n';
return false;
}
filesystem::path memPath = path / "memory";
if (not filesystem::is_regular_file(regPath))
{
cerr << "Error: Snapshot file does not exists: " << memPath << '\n';
return false;
}
if (not hart.loadSnapshot(path))
{
cerr << "Error: Failed to load sanpshot from dir " << snapDir << '\n';
return false;
}
return true;
}
/// Apply command line arguments: Load ELF and HEX files, set
/// start/end/tohost. Return true on success and false on failure.
template<typename URV>
static
bool
applyCmdLineArgs(const Args& args, Hart<URV>& hart)
{
unsigned errors = 0;
std::string isa = args.isa;
// Handle linux/newlib adjusting stack if needed.
bool clib = enableNewlibOrLinuxFromElf(args, hart, isa);
if (not isa.empty())
{
if (not applyIsaString(isa, hart))
errors++;
}
if (not applyZisaStrings(args.zisa, hart))
errors++;
if (clib) // Linux or newlib enabled.
sanitizeStackPointer(hart, args.verbose);
if (args.toHostSym)
hart.setTohostSymbol(*args.toHostSym);
if (args.consoleIoSym)
hart.setConsoleIoSymbol(*args.consoleIoSym);
// Load ELF files.
for (const auto& target : args.expandedTargets)
{
const auto& elfFile = target.front();
if (args.verbose)
std::cerr << "Loading ELF file " << elfFile << '\n';
size_t entryPoint = 0;
if (hart.loadElfFile(elfFile, entryPoint))
hart.pokePc(URV(entryPoint));
else
errors++;
}
// Load HEX files.
for (const auto& hexFile : args.hexFiles)
{
if (args.verbose)
std::cerr << "Loading HEX file " << hexFile << '\n';
if (not hart.loadHexFile(hexFile))
errors++;
}
if (not args.instFreqFile.empty())
hart.enableInstructionFrequency(true);
if (not args.loadFrom.empty())
if (not loadSnapshot(hart, args.loadFrom))
errors++;
if (not args.stdoutFile.empty())
if (not hart.redirectOutputDescriptor(STDOUT_FILENO, args.stdoutFile))
errors++;
if (not args.stderrFile.empty())
if (not hart.redirectOutputDescriptor(STDERR_FILENO, args.stderrFile))
errors++;
// Command line to-host overrides that of ELF and config file.
if (args.toHost)
hart.setToHostAddress(*args.toHost);
// Command-line entry point overrides that of ELF.
if (args.startPc)
hart.pokePc(URV(*args.startPc));
// Command-line exit point overrides that of ELF.
if (args.endPc)
hart.setStopAddress(URV(*args.endPc));
// Command-line console io address overrides config file.
if (args.consoleIo)
hart.setConsoleIo(URV(*args.consoleIo));
// Set instruction count limit.
if (args.instCountLim)
hart.setInstructionCountLimit(*args.instCountLim);
// Print load-instruction data-address when tracing instructions.
hart.setTraceLoadStore(args.traceLdSt);
// Setup periodic external interrupts.
if (args.alarmInterval)
{
// Convert from micro-seconds to processor ticks. Assume a 1
// ghz-processor.
uint64_t ticks = (*args.alarmInterval)*1000;
hart.setupPeriodicTimerInterrupts(ticks);
}
hart.enableTriggers(args.triggers);
hart.enableGdb(args.gdb);
hart.setGdbTcpPort(args.gdbTcpPort);
hart.enablePerformanceCounters(args.counters);
hart.enableAbiNames(args.abiNames);
if (args.fastExt)
hart.enableFastInterrupts(args.fastExt);
// Apply register initialization.
if (not applyCmdLineRegInit(args, hart))
errors++;
if (args.expandedTargets.empty())
return errors == 0;
// Setup target program arguments.
if (clib)
{
if (args.loadFrom.empty())
if (not hart.setTargetProgramArgs(args.expandedTargets.front()))
{
size_t memSize = hart.memorySize();
size_t suggestedStack = memSize - 4;
std::cerr << "Failed to setup target program arguments -- stack "
<< "is not writable\n"
<< "Try using --setreg sp=<val> to set the stack pointer "
<< "to a\nwritable region of memory (e.g. --setreg "
<< "sp=0x" << std::hex << suggestedStack << '\n'
<< std::dec;
errors++;
}
}
else if (args.expandedTargets.front().size() > 1)
{
std::cerr << "Warning: Target program options present which requires\n"
<< " the use of --newlib/--linux. Options ignored.\n";
}
return errors == 0;
}
/// Open a server socket and put opened socket information (hostname
/// and port number) in the given server file. Wait for one
/// connection. Service connection. Return true on success and false
/// on failure.
template <typename URV>
static
bool
runServer(std::vector<Hart<URV>*>& harts, const std::string& serverFile,
FILE* traceFile, FILE* commandLog)
{
char hostName[1024];
if (gethostname(hostName, sizeof(hostName)) != 0)
{
std::cerr << "Failed to obtain name of this computer\n";
return false;
}
int soc = socket(AF_INET, SOCK_STREAM, 0);