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feat(npc): difftest execution abstraction layer

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xinyangli 2024-04-10 20:12:41 +08:00
parent e828e140cd
commit 89847cfdb4
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nemu/src/cpu/difftest/ref.c
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@ -25,7 +25,7 @@ __EXPORT void difftest_memcpy(paddr_t addr, void *buf, size_t n,
if (direction == DIFFTEST_TO_REF) {
memcpy(guest_to_host(addr), buf, n);
} else {
assert(0);
memcpy(buf, guest_to_host(addr), n);
}
}

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npc/LICENSE Normal file
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@ -0,0 +1,674 @@
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might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

2
npc/csrc/Flow/CMakeLists.txt
View file

@ -1,6 +1,6 @@
include(ChiselBuild)
add_executable(V${TOPMODULE} config.cpp main.cpp)
target_link_libraries(V${TOPMODULE} PRIVATE disasm sdb)
target_link_libraries(V${TOPMODULE} PRIVATE sdb)
verilate(V${TOPMODULE} TRACE COVERAGE THREADS
TOP_MODULE ${TOPMODULE}

70
npc/csrc/Flow/main.cpp
View file

@ -7,13 +7,19 @@
#include <VFlow.h>
#include <cstdint>
#include <cstdlib>
#include <difftest.hpp>
#include <filesystem>
#include <fstream>
#include <sdb.hpp>
#include <trm_difftest.hpp>
#include <trm_interface.hpp>
#include <types.h>
using VlModule = VlModuleInterfaceCommon<VFlow>;
using Registers = _RegistersVPI<uint32_t, 32>;
// SDB::SDB<NPC::npc_interface> sdb_dut;
using CPUState = CPUStateBase<uint32_t, 32>;
CPUState npc_cpu;
extern "C" {
void *pmem_get() {
static auto pmem = new Memory<int, 128 * 1024>(config.memory_file,
@ -36,16 +42,21 @@ void pmem_write(int waddr, int wdata, char wmask) {
}
}
Disassembler d{"riscv32-pc-linux-gnu"};
VlModule *top;
Registers *regs;
vpiHandle pc = nullptr;
void difftest_memcpy(paddr_t, void *, size_t, bool){};
void difftest_regcpy(void *p, bool direction) {
namespace NPC {
void npc_memcpy(paddr_t addr, void *buf, size_t sz, bool direction) {
if (direction == TRM_FROM_MACHINE) {
memcpy(buf, static_cast<Memory<int, 128 * 1024> *>(pmem_get())->mem.data(),
sz);
}
};
if (direction == DIFFTEST_FROM_REF) {
void npc_regcpy(void *p, bool direction) {
if (direction == TRM_FROM_MACHINE) {
((CPUState *)p)->pc = regs->get_pc();
for (int i = 0; i < 32; i++) {
((CPUState *)p)->reg[i] = (*regs)[i];
@ -53,7 +64,7 @@ void difftest_regcpy(void *p, bool direction) {
}
}
void difftest_exec(uint64_t n) {
void npc_exec(uint64_t n) {
while (n--) {
for (int i = 0; i < 2; i++) {
if (top->is_posedge()) {
@ -64,22 +75,38 @@ void difftest_exec(uint64_t n) {
}
}
}
// std::cout << d.disassemble(top->rootp->Flow__DOT__pc__DOT__pc_reg, (uint8_t *)&top->rootp->Flow__DOT___ram_inst, 4) << std::endl;
void difftest_init(int port) {
void npc_init(int port) {
// top = std::make_unique<VlModule>(config.do_trace, config.wavefile);
top = new VlModule{config.do_trace, config.wavefile};
regs = new Registers("TOP.Flow.reg_0.regFile_", "TOP.Flow.pc.out");
top->reset_eval(10);
}
DifftestInterface dut_interface = DifftestInterface{
&difftest_memcpy, &difftest_regcpy, &difftest_exec, &difftest_init};
class DutTrmInterface : public TrmInterface {
public:
DutTrmInterface(memcpy_t f_memcpy, regcpy_t f_regcpy, exec_t f_exec,
init_t f_init, void *cpu_state)
: TrmInterface{f_memcpy, f_regcpy, f_exec, f_init, cpu_state} {}
word_t at(std::string name) const override {
return ((CPUState *)cpu_state)->at(name);
}
word_t at(paddr_t addr) const override {
word_t buf;
this->memcpy(addr, &buf, sizeof(word_t), TRM_FROM_MACHINE);
return buf;
}
void print(std::ostream &os) const override {}
};
DutTrmInterface npc_interface =
DutTrmInterface{&npc_memcpy, &npc_regcpy, &npc_exec, &npc_init, &npc_cpu};
}; // namespace NPC
SDB::SDB<dut_interface> sdb_dut;
extern "C" {
word_t reg_str2val(const char *name, bool *success) {
return sdb_dut.reg_str2val(name, success);
return npc_cpu.reg_str2val(name, success);
}
}
@ -88,20 +115,13 @@ int main(int argc, char **argv, char **env) {
/* -- Difftest -- */
std::filesystem::path ref{config.lib_ref};
DifftestInterface ref_interface = DifftestInterface{ref};
RefTrmInterface ref_interface{ref};
DifftestTrmInterface diff_interface{NPC::npc_interface, ref_interface,
pmem_get(), 128};
SDB::SDB sdb_diff{diff_interface};
Difftest<CPUStateBase<uint32_t, 32>> diff{dut_interface, ref_interface,
pmem_get(), 128};
int t = 8;
sdb_dut.main_loop();
while (t--) {
if (!diff.step(1)) {
uint32_t pc = regs->get_pc();
uint32_t inst = pmem_read(pc);
std::cout << diff << d.disassemble(pc, (uint8_t *)&inst, 4) << std::endl;
return EXIT_FAILURE;
}
}
sdb_diff.main_loop();
return 0;
}

8
npc/include/components.hpp
View file

@ -11,14 +11,6 @@
#include <stdexcept>
#include <string>
const std::map<std::string, int> riscv32_regs_by_name{
{"$0", 0}, {"ra", 1}, {"sp", 2}, {"gp", 3}, {"tp", 4}, {"t0", 5},
{"t1", 6}, {"t2", 7}, {"s0", 8}, {"s1", 9}, {"a0", 10}, {"a1", 11},
{"a2", 12}, {"a3", 13}, {"a4", 14}, {"a5", 15}, {"a6", 16}, {"a7", 17},
{"s2", 18}, {"s3", 19}, {"s4", 20}, {"s5", 21}, {"s6", 22}, {"s7", 23},
{"s8", 24}, {"s9", 25}, {"s10", 26}, {"s11", 27}, {"t3", 28}, {"t4", 29},
{"t5", 30}, {"t6", 31}};
template <typename T, std::size_t nr> class _RegistersBase {
std::array<T, nr> regs;
T pc;

130
npc/include/difftest.hpp
View file

@ -1,130 +0,0 @@
#ifndef _DIFFTEST_DIFFTEST_H_
#define _DIFFTEST_DIFFTEST_H_
#include <cassert>
#include <components.hpp>
#include <cstdint>
#include <cstdlib>
#include <dlfcn.h>
#include <filesystem>
#include <functional>
#include <iostream>
#include <map>
#include <memory>
using paddr_t = uint32_t;
enum { DIFFTEST_FROM_REF, DIFFTEST_TO_REF };
struct DifftestInterface {
using memcpy_t = void (*)(paddr_t, void *, size_t, bool);
using regcpy_t = void (*)(void *, bool);
using exec_t = void (*)(uint64_t);
using init_t = void (*)(int);
std::function<void(paddr_t, void *, size_t, bool)> memcpy;
std::function<void(void *, bool)> regcpy;
std::function<void(uint64_t)> exec;
std::function<void(int)> init;
DifftestInterface(memcpy_t memcpy, regcpy_t regcpy, exec_t exec, init_t init)
: memcpy(memcpy), regcpy(regcpy), exec(exec), init(init){};
// using fs = std::filesystem::path;
DifftestInterface(std::filesystem::path lib_file) {
void *handle = dlopen(lib_file.c_str(), RTLD_LAZY);
assert(handle != nullptr);
memcpy = (memcpy_t)dlsym(handle, "difftest_memcpy");
assert(memcpy);
regcpy = (regcpy_t)dlsym(handle, "difftest_regcpy");
assert(regcpy);
exec = (exec_t)dlsym(handle, "difftest_exec");
assert(exec);
init = (init_t)dlsym(handle, "difftest_init");
assert(init);
}
};
template <typename S> class Difftest {
const DifftestInterface &ref;
std::unique_ptr<S> ref_state;
const DifftestInterface &dut;
std::unique_ptr<S> dut_state;
public:
Difftest(const DifftestInterface &dut, const DifftestInterface &ref,
void *mem, size_t n, std::unique_ptr<S> ref_state = nullptr,
std::unique_ptr<S> dut_state = nullptr)
: ref(ref), dut(dut), ref_state(std::move(ref_state)),
dut_state(std::move(dut_state)) {
if (ref_state == nullptr)
this->ref_state = std::make_unique<S>();
if (dut_state == nullptr)
this->dut_state = std::make_unique<S>();
ref.init(0);
dut.init(0);
fetch_state();
paddr_t reset_vector = 0x80000000;
ref.memcpy(reset_vector, mem, n, DIFFTEST_TO_REF);
dut.memcpy(reset_vector, mem, n, DIFFTEST_TO_REF);
};
void fetch_state() {
ref.regcpy(ref_state.get(), DIFFTEST_FROM_REF);
dut.regcpy(dut_state.get(), DIFFTEST_FROM_REF);
}
bool step(uint64_t n) {
ref.exec(n);
dut.exec(n);
fetch_state();
return *ref_state == *dut_state;
}
friend std::ostream &operator<<(std::ostream &os, const Difftest<S> &d) {
os << "REF state:\n"
<< *d.ref_state << "DUT state:\n"
<< *d.dut_state << std::endl;
return os;
}
};
template <typename R, size_t nr_reg> struct CPUStateBase {
R reg[nr_reg] = {0};
paddr_t pc = 0x80000000;
static const std::map<std::string, int> inline regs_by_name =
riscv32_regs_by_name;
CPUStateBase() {
for (int i = 0; i < nr_reg; i++)
reg[i] = 0;
}
bool operator==(const CPUStateBase &other) const {
if (pc != other.pc)
return false;
for (int i = 0; i < nr_reg; ++i) {
if (reg[i] != other.reg[i])
return false;
}
return true;
}
bool operator!=(const CPUStateBase &other) const {
return !(*this == other); // Reuse the == operator for != implementation
}
/* This does not update the register!!! */
R at(std::string name) { return reg[regs_by_name.at(name)]; }
};
template <typename R, size_t nr_reg>
std::ostream &operator<<(std::ostream &os, const CPUStateBase<R, nr_reg> &cpu) {
os << "PC: " << std::hex << cpu.pc << std::endl;
for (int i = 0; i < nr_reg; i++) {
os << "reg " << std::dec << std::setw(2) << i << ":" << std::hex
<< std::setw(10) << cpu.reg[i];
if (i % 4 == 3) {
os << std::endl;
} else {
os << " | ";
}
}
return os;
}
#endif

93
npc/include/trm_difftest.hpp Normal file
View file

@ -0,0 +1,93 @@
#ifndef _DIFFTEST_DIFFTEST_H_
#define _DIFFTEST_DIFFTEST_H_
#include "disasm.hpp"
#include "types.h"
#include <cassert>
#include <components.hpp>
#include <cstdint>
#include <cstdlib>
#include <dlfcn.h>
#include <filesystem>
#include <functional>
#include <iostream>
#include <map>
#include <memory>
#include <ostream>
#include <stdexcept>
#include <trm_interface.hpp>
Disassembler d{"riscv32-linux-pc-gnu"};
using paddr_t = uint32_t;
struct DifftestTrmInterface : public TrmInterface {
TrmInterface &dut;
TrmInterface &ref;
DifftestTrmInterface(TrmInterface &dut, TrmInterface &ref, void *mem,
size_t mem_size)
: dut(dut), ref(ref) {
init = [this, mem, mem_size](int n) {
this->ref.init(n);
this->dut.init(n);
paddr_t reset_vector = 0x80000000;
this->ref.memcpy(reset_vector, mem, mem_size, TRM_TO_MACHINE);
this->dut.memcpy(reset_vector, mem, mem_size, TRM_TO_MACHINE);
fetch_state();
};
exec = [this](uint64_t n) {
while (n--) {
word_t pc = this->ref.at("pc");
word_t inst = this->ref.at(pc);
std::cout << d.disassemble(pc, (uint8_t *)&inst, WORD_BYTES)
<< std::endl;
this->ref.exec(1);
this->dut.exec(1);
this->ref.fetch_state();
this->dut.fetch_state();
if (*(CPUState *)this->ref.cpu_state !=
*(CPUState *)this->dut.cpu_state) {
throw std::runtime_error("Difftest failed");
}
}
};
// NOTE: Different from normal Trm, we copy 2 * sizeof(CPUState) to/from p,
// which represents ref_state and dut state
regcpy = [this](void *p, bool direction) {
// this->ref.regcpy(p, direction);
// this->dut.regcpy(p, direction);
};
memcpy = [this](paddr_t paddr, void *p, size_t n, bool direction) {
this->dut.memcpy(paddr, p, n, direction);
this->ref.memcpy(paddr, (uint8_t *)p + n, n, direction);
};
}
word_t at(std::string name) const override {
if (name.empty()) {
throw std::runtime_error("Empty register name");
} else if (name[0] == 'r') {
std::cout << name.substr(1) << std::endl;
this->ref.at(name.substr(1));
} else if (name[0] == 'd') {
this->dut.at(name.substr(1));
} else {
throw std::runtime_error("Register name provided to difftest interface "
"must start with r or d.");
}
return 0;
}
word_t at(paddr_t addr) const override {
std::cout << ref.at(addr) << "\t" << dut.at(addr) << std::endl;
return dut.at(addr);
}
void print(std::ostream &os) const override {
os << "REF state:\n"
<< *(CPUState *)ref.cpu_state << "DUT state:\n"
<< *(CPUState *)dut.cpu_state << std::endl;
}
};
#endif

139
npc/include/trm_interface.hpp Normal file
View file

@ -0,0 +1,139 @@
#ifndef _NPC_TRM_INTERFACE_HEADER_FILE_
#define _NPC_TRM_INTERFACE_HEADER_FILE_
#include <dlfcn.h>
#include <filesystem>
#include <functional>
#include <stdexcept>
#include <string>
#include <types.h>
template <typename R, size_t nr_reg> struct CPUStateBase {
R reg[nr_reg] = {0};
word_t pc = 0x80000000;
static const std::map<std::string, int> inline regs_by_name =
riscv32_regs_by_name;
CPUStateBase() {
for (int i = 0; i < nr_reg; i++)
reg[i] = 0;
}
bool operator==(const CPUStateBase &other) const {
if (pc != other.pc)
return false;
for (int i = 0; i < nr_reg; ++i) {
if (reg[i] != other.reg[i])
return false;
}
return true;
}
bool operator!=(const CPUStateBase &other) const {
return !(*this == other); // Reuse the == operator for != implementation
}
/* This does not update the register!!! */
R at(std::string name) {
return name == "pc" ? pc : reg[regs_by_name.at(name)];
}
uint32_t reg_str2val(const char *name, bool *success) {
try {
*success = true;
return this->at(name);
} catch (std::runtime_error) {
*success = false;
return 0;
}
}
};
template <typename R, size_t nr_reg>
std::ostream &operator<<(std::ostream &os, const CPUStateBase<R, nr_reg> &cpu) {
os << "PC: " << std::hex << cpu.pc << std::endl;
for (int i = 0; i < nr_reg; i++) {
os << "reg " << std::dec << std::setw(2) << i << ":" << std::hex
<< std::setw(10) << cpu.reg[i];
if (i % 4 == 3) {
os << std::endl;
} else {
os << " | ";
}
}
return os;
}
using CPUState = CPUStateBase<word_t, REG_COUNT>;
enum { TRM_FROM_MACHINE, TRM_TO_MACHINE };
class TrmInterface {
protected:
using memcpy_t = void (*)(paddr_t, void *, size_t, bool);
using regcpy_t = void (*)(void *, bool);
using exec_t = void (*)(uint64_t);
using init_t = void (*)(int);
std::function<void(void *, bool)> regcpy;
public:
std::function<void(uint64_t)> exec;
std::function<void(int)> init;
// TODO: paddr_t can probably changed to (void *)?
std::function<void(paddr_t, void *, size_t, bool)> memcpy;
// Managed by callee
void *cpu_state;
TrmInterface() {}
TrmInterface(memcpy_t f_memcpy, regcpy_t f_regcpy, exec_t f_exec,
init_t f_init, void *cpu_state)
: memcpy(f_memcpy), regcpy(f_regcpy), exec(f_exec), init(f_init),
cpu_state(cpu_state) {}
void fetch_state() { this->regcpy(cpu_state, TRM_FROM_MACHINE); }
void push_state() { this->regcpy(cpu_state, TRM_TO_MACHINE); }
virtual word_t at(std::string) const = 0;
virtual word_t at(word_t addr) const = 0;
virtual void print(std::ostream &os) const = 0;
};
struct RefTrmInterface : TrmInterface {
RefTrmInterface(std::filesystem::path lib_file) {
void *handle = dlopen(lib_file.c_str(), RTLD_LAZY);
if (handle == nullptr) {
throw std::runtime_error("Failed to open diff library file");
};
memcpy = (memcpy_t)dlsym(handle, "difftest_memcpy");
if (handle == nullptr) {
throw std::runtime_error("Failed to find `difftest_memcpy`");
};
regcpy = (regcpy_t)dlsym(handle, "difftest_regcpy");
if (handle == nullptr) {
throw std::runtime_error("Failed to find `difftest_regcpy`");
};
exec = (exec_t)dlsym(handle, "difftest_exec");
if (handle == nullptr) {
throw std::runtime_error("Failed to find `difftest_exec`");
};
init = (init_t)dlsym(handle, "difftest_init");
if (handle == nullptr) {
throw std::runtime_error("Failed to find `difftest_init`");
};
cpu_state = new CPUState{};
}
~RefTrmInterface() { delete (CPUState *)cpu_state; }
word_t at(std::string name) const override {
return ((CPUState *)cpu_state)->at(name);
}
word_t at(paddr_t addr) const override {
word_t buf;
this->memcpy(addr, &buf, sizeof(word_t), TRM_FROM_MACHINE);
return buf;
}
void print(std::ostream &os) const override { os << *(CPUState *)cpu_state; }
};
#endif

13
npc/include/types.h
View file

@ -8,6 +8,7 @@ static const word_t WORD_T_MAX = UINT32_MAX;
static const sword_t SWORD_T_MAX = INT32_MAX;
static const sword_t SWORD_T_MIN = INT32_MIN;
#define WORD_BYTES 4
#define REG_COUNT 32
#define FMT_WORD "0x%08x"
typedef uint32_t vaddr_t;
@ -16,8 +17,16 @@ typedef uint32_t paddr_t;
typedef uint16_t ioaddr_t;
#ifdef __cplusplus
#include <difftest.hpp>
using CPUState = CPUStateBase<word_t, 32>;
#include <map>
#include <string>
const std::map<std::string, int> riscv32_regs_by_name{
{"$0", 0}, {"ra", 1}, {"sp", 2}, {"gp", 3}, {"tp", 4}, {"t0", 5},
{"t1", 6}, {"t2", 7}, {"s0", 8}, {"s1", 9}, {"a0", 10}, {"a1", 11},
{"a2", 12}, {"a3", 13}, {"a4", 14}, {"a5", 15}, {"a6", 16}, {"a7", 17},
{"s2", 18}, {"s3", 19}, {"s4", 20}, {"s5", 21}, {"s6", 22}, {"s7", 23},
{"s8", 24}, {"s9", 25}, {"s10", 26}, {"s11", 27}, {"t3", 28}, {"t4", 29},
{"t5", 30}, {"t6", 31}};
#endif
#endif

3
npc/include/vl_wrapper.hpp
View file

@ -19,8 +19,7 @@ public:
~Tracer() { m_trace->close(); }
/**
* Dump signals to waveform file. Must be called once after every top->eval()
* call.
* @brief: Dump signals to waveform file. Must be called once after every top->eval() call.
*/
void update() { m_trace->dump(cycle++); }
};

1
npc/utils/CMakeLists.txt
View file

@ -1,4 +1,3 @@
add_subdirectory(disasm)
if (ENABLE_SDB)
add_subdirectory(sdb)
endif()

5
npc/utils/disasm/CMakeLists.txt
View file

@ -1,4 +1 @@
add_library(disasm disasm.cpp)
target_include_directories(disasm PUBLIC include)
llvm_map_components_to_libnames(LLVM_LIBS ${LLVM_TARGETS_TO_BUILD})
target_link_libraries(disasm PUBLIC ${LLVM_LIBS})

9
npc/utils/sdb/CMakeLists.txt
View file

@ -4,11 +4,14 @@ find_package(BISON REQUIRED)
set(PARSER_DIR "${CMAKE_CURRENT_BINARY_DIR}")
set(LEXER_OUT "${PARSER_DIR}/lexer.c")
set(PARSER_OUT "${PARSER_DIR}/parser.c")
flex_target(LEXER addrexp.l "${LEXER_OUT}" DEFINES_FILE "${PARSER_DIR}/addrexp_lex.h")
bison_target(PARSER addrexp.y "${PARSER_OUT}" DEFINES_FILE "${PARSER_DIR}/addrexp.h")
flex_target(LEXER addrexp.l "${LEXER_OUT}" DEFINES_FILE "${PARSER_DIR}/include/addrexp_lex.h")
bison_target(PARSER addrexp.y "${PARSER_OUT}" DEFINES_FILE "${PARSER_DIR}/include/addrexp.h")
add_flex_bison_dependency(LEXER PARSER)
add_library(sdb sdb.cpp console.cpp "${LEXER_OUT}" "${PARSER_OUT}")
add_library(sdb sdb.cpp console.cpp disasm.cpp "${LEXER_OUT}" "${PARSER_OUT}")
llvm_map_components_to_libnames(LLVM_LIBS ${LLVM_TARGETS_TO_BUILD})
target_link_libraries(sdb PUBLIC ${LLVM_LIBS})
target_link_libraries(sdb PRIVATE ${Readline_LIBRARY})
target_include_directories(sdb PRIVATE ${PARSER_DIR}/include)
target_include_directories(sdb PRIVATE ${Readline_INCLUDE_DIR})
target_include_directories(sdb PUBLIC include)

0
npc/utils/disasm/disasm.cpp → npc/utils/sdb/disasm.cpp
View file

0
npc/utils/disasm/include/disasm.hpp → npc/utils/sdb/include/disasm.hpp
View file

125
npc/utils/sdb/include/sdb.hpp
View file

@ -3,9 +3,9 @@
#include <components.hpp>
#include <console.hpp>
#include <difftest.hpp>
#include <memory>
#include <stdexcept>
#include <trm_interface.hpp>
#include <types.h>
namespace cr = CppReadline;
@ -13,122 +13,53 @@ using ret = cr::Console::ReturnCode;
namespace SDB {
enum SDBStatus {
SDB_SUCCESS,
SDB_WRONG_ARGUMENT,
};
enum SDBStatus { SDB_SUCCESS, SDB_WRONG_ARGUMENT, SDB_DIFFTEST_FAILED };
class SDBHandlers;
struct Handler {
const std::vector<const char *> names;
cr::Console::CommandFunction f;
// cr::Console::CommandFunction f;
std::function<int(SDBHandlers *, const cr::Console::Arguments &)> f;
};
template <const DifftestInterface &funcs> class _SDBHandlers {
using CPUState = CPUStateBase<uint32_t, 32>;
class SDBHandlers {
private:
std::vector<Handler> all_handlers;
const TrmInterface &funcs;
std::vector<Handler> all_handlers = {
Handler{{"c", "continue"}, &SDBHandlers::cmd_continue},
Handler{{"si", "step-instruction"}, &SDBHandlers::cmd_step},
Handler{{"info-r"}, &SDBHandlers::cmd_info_registers},
Handler{{"p", "print"}, &SDBHandlers::cmd_print},
};
int cmd_continue(const cr::Console::Arguments &input);
int cmd_step(const std::vector<std::string> &input);
int cmd_info_registers(const std::vector<std::string> &input);
int cmd_print(const std::vector<std::string> &input);
public:
static CPUState cpu;
private:
static _SDBHandlers<funcs> *instance;
static int cmd_continue(const cr::Console::Arguments &input);
static int cmd_step(const std::vector<std::string> &input);
static int cmd_info_registers(const std::vector<std::string> &input);
static int cmd_print(const std::vector<std::string> &input);
_SDBHandlers<funcs>(std::vector<Handler> all_handlers)
: all_handlers(all_handlers){};
public:
_SDBHandlers<funcs>(const _SDBHandlers<funcs> &) = delete;
_SDBHandlers<funcs> operator=(const _SDBHandlers<funcs> &) = delete;
static _SDBHandlers<funcs> *getInstance() {
if (instance == nullptr) {
std::vector<Handler> all_handlers{
Handler{{"c", "continue"}, &_SDBHandlers::cmd_continue},
Handler{{"si", "step-instruction"}, &_SDBHandlers::cmd_step},
};
instance = new _SDBHandlers<funcs>(all_handlers);
}
return instance;
}
SDBHandlers(const TrmInterface &funcs) : funcs(funcs){};
void registerHandlers(cr::Console *c);
};
template <const DifftestInterface &funcs>
_SDBHandlers<funcs> *_SDBHandlers<funcs>::instance = nullptr;
template <const DifftestInterface &funcs>
CPUState _SDBHandlers<funcs>::cpu = CPUState();
template <const DifftestInterface &funcs>
int _SDBHandlers<funcs>::cmd_continue(const cr::Console::Arguments &input) {
if (input.size() > 1)
return SDB_WRONG_ARGUMENT;
funcs.exec(-1);
return SDB_SUCCESS;
}
template <const DifftestInterface &funcs>
int _SDBHandlers<funcs>::cmd_step(const std::vector<std::string> &input) {
if (input.size() > 2) {
return SDB_WRONG_ARGUMENT;
}
uint64_t step_count = input.size() == 2 ? std::stoull(input[1]) : 1;
funcs.exec(step_count);
return SDB_SUCCESS;
}
template <const DifftestInterface &funcs>
int _SDBHandlers<funcs>::cmd_info_registers(
const std::vector<std::string> &input) {
if (input.size() > 1)
return SDB_WRONG_ARGUMENT;
std::cout << _SDBHandlers<funcs>::getInstance()->cpu << std::endl;
return SDB_SUCCESS;
}
template <const DifftestInterface &funcs>
int _SDBHandlers<funcs>::cmd_print(const std::vector<std::string> &input) {
exit(1);
}
template <const DifftestInterface &funcs>
void _SDBHandlers<funcs>::registerHandlers(cr::Console *c) {
for (auto &h : this->all_handlers) {
for (auto &name : h.names) {
c->registerCommand(name, h.f);
}
}
}
template <const DifftestInterface &funcs> class SDB {
class SDB {
private:
std::unique_ptr<CppReadline::Console> c;
using SDBHandlers = _SDBHandlers<funcs>;
const TrmInterface &funcs;
SDBHandlers handlers;
public:
SDB(std::string const &greeting = "\033[1;34m(npc)\033[0m ") {
SDB(const TrmInterface &funcs,
std::string const &greeting = "\033[1;34m(npc)\033[0m ")
: handlers(SDBHandlers{funcs}), funcs(funcs) {
c = std::make_unique<CppReadline::Console>(greeting);
SDBHandlers::getInstance()->registerHandlers(c.get());
};
word_t reg_str2val(const char *name, bool *success) {
try {
*success = true;
return SDBHandlers::getInstance()->cpu.at(name);
} catch (std::runtime_error) {
*success = false;
return 0;
}
}
handlers.registerHandlers(c.get());
};
int main_loop() {
int retCode;
funcs.init(0);
do {
retCode = c->readLine();
// We can also change the prompt based on last return value:

78
npc/utils/sdb/sdb.cpp
View file

@ -1,10 +1,84 @@
#include <components.hpp>
#include <console.hpp>
#include <difftest.hpp>
#include <disasm.hpp>
#include <sdb.hpp>
#include <stdexcept>
#include <trm_interface.hpp>
#include <types.h>
extern "C" {
#include <addrexp.h>
#include <addrexp_lex.h>
}
namespace cr = CppReadline;
using ret = cr::Console::ReturnCode;
namespace SDB {}
std::ostream &operator<<(std::ostream &os, const TrmInterface &d) {
d.print(os);
return os;
};
namespace SDB {
int SDBHandlers::cmd_continue(const cr::Console::Arguments &input) {
if (input.size() > 1)
return SDB_WRONG_ARGUMENT;
this->funcs.exec(-1);
return SDB_SUCCESS;
}
int SDBHandlers::cmd_step(const std::vector<std::string> &input) {
if (input.size() > 2) {
return SDB_WRONG_ARGUMENT;
}
uint64_t step_count = input.size() == 2 ? std::stoull(input[1]) : 1;
try {
this->funcs.exec(step_count);
} catch (std::runtime_error) {
std::cout << "Difftest Failed" << std::endl << funcs << std::endl;
return SDB_DIFFTEST_FAILED;
}
// std::cout << funcs << std::endl;
return SDB_SUCCESS;
}
int SDBHandlers::cmd_info_registers(const std::vector<std::string> &input) {
if (input.size() > 1)
return SDB_WRONG_ARGUMENT;
std::cout << this->funcs << std::endl;
return SDB_SUCCESS;
}
word_t parse_expr(const char *arg) {
if (arg == NULL) {
puts("Invalid expr argument.");
return 0;
} else {
word_t res;
yy_scan_string(arg);
yyparse(&res);
yylex_destroy();
return res;
}
}
int SDBHandlers::cmd_print(const std::vector<std::string> &input) {
word_t buf[2];
word_t addr = parse_expr(input[1].c_str());
this->funcs.memcpy(addr, &buf, sizeof(word_t), TRM_FROM_MACHINE);
// TODO: Difftest only
std::cout << std::hex << "dut: 0x" << buf[0] << ' ' << "ref: 0x" << buf[1]
<< std::dec << std::endl;
return SDB_SUCCESS;
}
void SDBHandlers::registerHandlers(cr::Console *c) {
for (auto &h : this->all_handlers) {
for (auto &name : h.names) {
std::function<int(std::vector<std::string>)> f{
std::bind(h.f, this, std::placeholders::_1)};
c->registerCommand(name, f);
}
}
}
} // namespace SDB