feat(npc): port to export gdbstub api

npc/csrc/Flow/CMakeLists.txt

@@ -27,3 +27,26 @@ foreach(DIFFTEST_BINARY_FILE IN LISTS DIFFTEST_BINARY_FILES)
                    ${DIFFTEST_LIB})
   unset(FILENAME)
 endforeach()
+
+add_library(${TOPMODULE} SHARED config.cpp main.cpp)
+target_link_libraries(${TOPMODULE} PRIVATE devices gdbstub)
+target_include_directories(${TOPMODULE} PRIVATE ${CMAKE_SOURCE_DIR}/include)
+set_property(TARGET PROPERTY POSITION_INDEPENDENT_CODE ON)
+target_link_options(${TOPMODULE} PRIVATE -Wl,-E)
+
+verilate(
+  ${TOPMODULE}
+  TRACE
+  THREADS
+  TOP_MODULE
+  ${TOPMODULE}
+  PREFIX
+  V${TOPMODULE}
+  SOURCES
+  ${CHISEL_OUTPUT_TOPMODULE}
+  ${CHISEL_OUTPUT_VERILATOR_CONF}
+  INCLUDE_DIRS
+  ${CHISEL_OUTPUT_DIR}
+  VERILATOR_ARGS
+  "--vpi" # Enable VPI
+  "-Wno-UNOPTFLAT")

npc/csrc/Flow/main.cpp

@@ -1,7 +1,7 @@
 extern "C" {
 #include <gdbstub.h>
 }
-#include "VFlow___024root.h"
+// #include "VFlow___024root.h"
 #include "components.hpp"
 #include <VFlow.h>
 #include <config.hpp>
@@ -28,7 +28,7 @@ const size_t PMEM_START = 0x80000000;
 const size_t PMEM_END = 0x87ffffff;
 
 struct DbgState {
-  std::vector<Breakpoint> bp;
+  std::vector<Breakpoint> *bp;
 };
 
 extern "C" {
@@ -42,7 +42,10 @@ void *pmem_get() {
   };
   static auto pmem = new MemoryMap<Memory<128 * 1024>, Devices::DeviceMap>(
       std::make_unique<Memory<128 * 1024>>(
-          config.memory_file, config.memory_file_binary, PMEM_START, PMEM_END),
+          "/nix/store/"
+          "nv2c00y24qwz1jihfbaip9n1lskbzyb3-am-kernel-riscv32-none-elf-2024-07-"
+          "10/share/am-kernels/add.bin",
+          config.memory_file_binary, PMEM_START, PMEM_END),
       std::make_unique<Devices::DeviceMap>(devices), config.mtrace_ranges);
   return pmem;
 }
@@ -95,38 +98,61 @@ int npc_write_reg(void *args, int regno, size_t value) { return 1; }
 
 void npc_cont(void *args, gdb_action_t *res) {
   DbgState *dbg = (DbgState *)args;
-  *res = top->eval(dbg->bp);
+  *res = top->eval(*dbg->bp);
 }
 
 void npc_stepi(void *args, gdb_action_t *res) {
   DbgState *dbg = (DbgState *)args;
-  *res = top->eval(dbg->bp);
+  *res = top->eval(*dbg->bp);
 }
 
 bool npc_set_bp(void *args, size_t addr, bp_type_t type) {
   DbgState *dbg = (DbgState *)args;
-  for (const auto &bp : dbg->bp) {
+  for (const auto &bp : *dbg->bp) {
     if (bp.addr == addr && bp.type == type) {
       return true;
     }
   }
-  dbg->bp.push_back({.addr = addr, .type = type});
+  dbg->bp->push_back({.addr = addr, .type = type});
   return true;
 }
 
 bool npc_del_bp(void *args, size_t addr, bp_type_t type) {
   DbgState *dbg = (DbgState *)args;
-  for (auto it = dbg->bp.begin(); it != dbg->bp.end(); it++) {
+  for (auto it = dbg->bp->begin(); it != dbg->bp->end(); it++) {
     if (it->addr == addr && it->type == type) {
-      std::swap(*it, *dbg->bp.rbegin());
-      dbg->bp.pop_back();
+      std::swap(*it, *dbg->bp->rbegin());
+      dbg->bp->pop_back();
       return true;
     }
   }
   return false;
 }
 
-static target_ops npc_gdbstub_ops = {.cont = npc_cont,
+void npc_on_interrupt(void *args) { ; }
+
+void npc_init(void *args) {
+  DbgState *dbg = (DbgState *)args;
+  dbg->bp = new std::vector<Breakpoint>;
+
+  top = new VlModule;
+  regs = new Registers("TOP.Flow.reg_0.regFile_", "TOP.Flow.pc.out");
+  top->setup(config.wavefile, regs);
+  top->reset_eval(10);
+}
+
+static gdbstub_t gdbstub_priv;
+arch_info_t isa_arch_info = {
+    .target_desc = strdup(TARGET_RV32), .reg_num = 32, .reg_byte = 4};
+
+size_t argsize = sizeof(DbgState);
+
+} // extern "C"
+
+int gdbstub_loop() {
+  DbgState dbg;
+
+  target_ops npc_gdbstub_ops = {.cont = npc_cont,
                                 .stepi = npc_stepi,
                                 .read_reg = npc_read_reg,
                                 .write_reg = npc_write_reg,
@@ -136,29 +162,19 @@ static target_ops npc_gdbstub_ops = {.cont = npc_cont,
                                 .del_bp = npc_del_bp,
                                 .on_interrupt = NULL};
 
-static gdbstub_t gdbstub_priv;
-static DbgState dbg;
-arch_info_t isa_arch_info = {
-    .target_desc = strdup(TARGET_RV32), .reg_num = 33, .reg_byte = 4};
-
-int gdbstub_loop() {
   if (!gdbstub_init(&gdbstub_priv, &npc_gdbstub_ops, (arch_info_t)isa_arch_info,
-                    strdup("127.0.0.1:1234"))) {
+                    strdup("/tmp/gdbstub-npc.sock"))) {
     return EINVAL;
   }
+  npc_init(&dbg);
+
   bool success = gdbstub_run(&gdbstub_priv, &dbg);
-  gdbstub_close(&gdbstub_priv);
+  // gdbstub_close(&gdbstub_priv);
   return !success;
 }
-} // extern "C"
 
 int main(int argc, char **argv, char **env) {
   config.cli_parse(argc, argv);
 
-  top = new VlModule;
-  regs = new Registers("TOP.Flow.reg_0.regFile_", "TOP.Flow.pc.out");
-  top->setup(config.wavefile, regs);
-  top->reset_eval(10);
-
   return gdbstub_loop();
 }