按建议，继续完成后续工作

结论：将 Interp::synch() 当前/选中工具槽位读取接入 standalone tool adapter，并补充 native 验证。

wasm-port/docs/compatibility-validation.md

@@ -56,7 +56,7 @@ The validation fails if:
 | `linuxcnc_namedparam_harness` | Validates LinuxCNC named parameter behavior, `_ini[...]`, and `_hal[...]` adapter resolution. |
 | `linuxcnc_interp_minimal_harness` | Runs G-code fixtures through vendored LinuxCNC parser/execution/conversion code and captures canonical events. |
 | `linuxcnc_parameter_file_harness` | Validates LinuxCNC parameter file restore/save behavior and required/read-only parameter handling. |
-| `linuxcnc_interp_init_harness` | Validates vendored LinuxCNC `Interp::init()` emits canonical initialization boundaries and reads metric/inch machine units through the standalone event/status boundary. |
+| `linuxcnc_interp_init_harness` | Validates vendored LinuxCNC `Interp::init()` emits canonical initialization boundaries, reads metric/inch machine units, and synchronizes current/selected tool slots through standalone status adapters. |
 | `linuxcnc_indexer_harness` | Validates vendored LinuxCNC single-axis rotary indexer dispatch emits lock/unlock and motion boundaries through the standalone event sink. |
 | `linuxcnc_tp_api_probe` | Validates vendored LinuxCNC trajectory planner calls for linear, arc, and queued motion paths. |
 | `linuxcnc_kinematics_probe` | Validates vendored LinuxCNC `trivkins.c` plus `kins_util.c` initialize and perform identity forward/inverse mapping through the standalone HAL/RTAPI boundary. |
@@ -140,7 +140,8 @@ resolution. `state_tag_motion` now compares its motion events with upstream
 `rs274`, while `UPDATE_TAG` events remain a standalone state-tag capture
 boundary. `tool_semantics` now compares T/M6/G43/G49 canonical events with
 upstream `rs274`; M61 current-pocket host-state behavior remains covered by the
-standalone fixture expectation.
+standalone fixture expectation, and `Interp::synch()` current/selected tool
+slot reads are covered by the native init harness.
 
 The kinematics probes currently cover LinuxCNC identity/trivial kinematics, the
 switchable `5axiskins` XYZBCW bridge-mill model, TRT `xyzac`/`xyzbc`

wasm-port/docs/drift-report.md

@@ -27,6 +27,7 @@ semantic rewrites:
 | INI lookup | Standalone INI adapter around vendored LinuxCNC INI parser behavior. |
 | Canonical output | Canonical calls are captured as test events instead of driving hardware. |
 | Tool-data reload | LinuxCNC `RELOAD_TOOLDATA` is captured as a canonical test event; browser/native tool-table reload plumbing remains a future host/runtime adapter. |
+| Tool slot status | Standalone tool adapter state supplies `GET_EXTERNAL_TOOL_SLOT()` and `GET_EXTERNAL_SELECTED_TOOL_SLOT()` for vendored `Interp::synch()`; `linuxcnc_interp_init_harness` guards current/selected slot synchronization. |
 | Interpreter state tags | LinuxCNC `UPDATE_TAG` callbacks are captured from the state tags packed by vendored interpreter code; standalone code does not derive modal state. |
 | Rotary indexer lock state | LinuxCNC `UNLOCK_ROTARY` and `LOCK_ROTARY` callbacks are captured from the vendored single-axis indexer path; standalone code does not implement rotary-indexing semantics. |
 | File flush | LinuxCNC `FINISH` is captured as a canonical test event on the vendored `%`-delimited file-reading path. |

wasm-port/docs/source-reuse-map.md

@@ -44,7 +44,7 @@ Current validation is intentionally mechanical:
 | Posemath | `src/libnml/posemath/posemath.cc`, `_posemath.c`, `gomath.c`, `sincos.c`, and matching headers | Copy unchanged | `gomath.c` is compiled as C; `rtapi.h` shim is C/C++ compatible for this boundary | Vendor byte sync, per-file source probes, TP probe |
 | RS274 interpreter state and parser | `src/emc/rs274ngc/modal_state.*`, `interp_internal.*`, `interp_read.cc`, `interp_check.cc`, `interp_execute.cc`, `interp_find.cc`, `interp_array.cc`, `interp_queue.*`, `rs274ngc*`, `units.h` | Copy unchanged | Python/remap/runtime edges are isolated in standalone wrappers and shims; parser and execution logic remain LinuxCNC source | Vendor byte sync, per-file source probes, interpreter harness fixtures |
 | RS274 conversion semantics | `src/emc/rs274ngc/interp_convert.cc`, `interp_arc.cc`, `interp_inverse.cc`, `interp_cycles.cc`, `interp_g7x.cc`, `interp_o_word.cc`, `interp_write.cc` | Copy unchanged | Canonical calls are captured by standalone event sink functions; conversion behavior stays in vendored LinuxCNC files | Vendor byte sync, per-file source probes, canonical fixture suite, no standalone `Interp::convert_g()` guard |
-| Named parameters | `src/emc/rs274ngc/interp_namedparams.cc`, related interpreter headers | Copy unchanged | `_ini[...]` and `_hal[...]` resolve through standalone INI/HAL adapters while lookup order stays LinuxCNC-derived | Vendor byte sync, source probe, `linuxcnc_namedparam_harness` |
+| Named parameters and tool slot status | `src/emc/rs274ngc/interp_namedparams.cc`, related interpreter headers | Copy unchanged | `_ini[...]` and `_hal[...]` resolve through standalone INI/HAL adapters while lookup order stays LinuxCNC-derived; current/selected tool slot reads for vendored `Interp::synch()` come from the standalone tool adapter | Vendor byte sync, source probe, `linuxcnc_namedparam_harness`, `linuxcnc_interp_init_harness` |
 | Dynamic interpreter base | `src/emc/rs274ngc/interp_base.*` | Copy unchanged | `interp_base.cc` source probe uses standalone `EMC2_HOME` compile-time path boundary for LinuxCNC dynamic interpreter lookup | Vendor byte sync, `linuxcnc_interp_base_source_probe` |
 
 ## Dependency Matrix

wasm-port/runtime/core/linuxcnc_wrap/linuxcnc_interp_init_harness.cpp

@@ -8,6 +8,7 @@
 #include <unistd.h>
 
 #include "canon_event_sink.hh"
+#include "linuxcnc_tool_adapter.hh"
 #include "nml_intf/emc.hh"
 
 namespace {
@@ -31,6 +32,7 @@ int main()
     std::filesystem::current_path(temp_dir);
 
     emcStatus->motion.traj.linearUnits = 1.0;
+    standalone::reset_tool_adapter();
     Interp interp;
     standalone::reset_canon_events();
 
@@ -47,6 +49,7 @@ int main()
     }
 
     emcStatus->motion.traj.linearUnits = 1.0 / 25.4;
+    standalone::reset_tool_adapter();
     Interp inch_interp;
     standalone::reset_canon_events();
     const int inch_rc = inch_interp.init();
@@ -60,7 +63,24 @@ int main()
         std::cout << "inch_canon_event=" << event << "\n";
     }
 
+    standalone::reset_tool_adapter();
+    CANON_TOOL_TABLE tool = standalone::tool_entry_init();
+    tool.toolno = 2;
+    tool.pocketno = 2;
+    standalone::set_tool_entry(2, tool);
+    standalone::select_tool(2);
+    standalone::change_selected_tool();
+
+    Interp synch_interp;
+    const int synch_rc = synch_interp.synch();
+    std::cout << "synch=" << synch_rc << "\n";
+    std::cout << "synch.current_pocket=" << synch_interp._setup.current_pocket << "\n";
+    std::cout << "synch.selected_pocket=" << synch_interp._setup.selected_pocket << "\n";
+    std::cout << "synch.tool_0=" << synch_interp._setup.tool_table[0].toolno << "\n";
+    std::cout << "synch.tool_2=" << synch_interp._setup.tool_table[2].toolno << "\n";
+
     emcStatus->motion.traj.linearUnits = 1.0;
+    standalone::reset_tool_adapter();
     std::filesystem::remove_all(temp_dir);
-    return (rc == INTERP_OK && inch_rc == INTERP_OK) ? 0 : 1;
+    return (rc == INTERP_OK && inch_rc == INTERP_OK && synch_rc == INTERP_OK) ? 0 : 1;
 }

wasm-port/runtime/core/linuxcnc_wrap/linuxcnc_interp_minimal_runtime.cpp

@@ -505,8 +505,8 @@ double GET_EXTERNAL_TOOL_LENGTH_COFFSET() { return 0.0; }
 double GET_EXTERNAL_TOOL_LENGTH_UOFFSET() { return 0.0; }
 double GET_EXTERNAL_TOOL_LENGTH_VOFFSET() { return 0.0; }
 double GET_EXTERNAL_TOOL_LENGTH_WOFFSET() { return 0.0; }
-int GET_EXTERNAL_TOOL_SLOT() { return 0; }
+int GET_EXTERNAL_TOOL_SLOT() { return standalone::current_tool_index(); }
-int GET_EXTERNAL_SELECTED_TOOL_SLOT() { return -1; }
+int GET_EXTERNAL_SELECTED_TOOL_SLOT() { return standalone::selected_tool_index(); }
 CANON_TOOL_TABLE GET_EXTERNAL_TOOL_TABLE(int index)
 {
     CANON_TOOL_TABLE tool = standalone::tool_entry_init();

wasm-port/runtime/core/linuxcnc_wrap/linuxcnc_tool_adapter.cpp

@@ -10,12 +10,18 @@ std::array<CANON_TOOL_TABLE, CANON_POCKETS_MAX> &tool_table()
     return tools;
 }
 
-int &selected_tool_index()
+int &selected_tool_index_ref()
 {
     static int index = -1;
     return index;
 }
 
+int &current_tool_index_ref()
+{
+    static int index = 0;
+    return index;
+}
+
 CANON_TOOL_TABLE empty_tool()
 {
     CANON_TOOL_TABLE tool{};
@@ -30,7 +36,8 @@ namespace standalone {
 
 void reset_tool_adapter()
 {
-    selected_tool_index() = -1;
+    selected_tool_index_ref() = -1;
+    current_tool_index_ref() = 0;
     auto &tools = tool_table();
     for (int index = 0; index < CANON_POCKETS_MAX; ++index) {
         tools[index] = empty_tool();
@@ -76,9 +83,19 @@ int get_tool_entry(CANON_TOOL_TABLE *tool, int index)
     return 0;
 }
 
+int current_tool_index()
+{
+    return current_tool_index_ref();
+}
+
+int selected_tool_index()
+{
+    return selected_tool_index_ref();
+}
+
 void select_tool(int toolno)
 {
-    selected_tool_index() = find_tool_index_for_tool(toolno);
+    selected_tool_index_ref() = find_tool_index_for_tool(toolno);
 }
 
 void change_tool_number(int index)
@@ -91,11 +108,12 @@ void change_tool_number(int index)
     CANON_TOOL_TABLE spindle_tool = tools[index];
     spindle_tool.pocketno = 0;
     tools[0] = spindle_tool;
+    current_tool_index_ref() = index;
 }
 
 void change_selected_tool()
 {
-    change_tool_number(selected_tool_index());
+    change_tool_number(selected_tool_index_ref());
 }
 
 }  // namespace standalone

wasm-port/runtime/core/linuxcnc_wrap/linuxcnc_tool_adapter.hh

@@ -9,6 +9,8 @@ void set_tool_entry(int index, const CANON_TOOL_TABLE &tool);
 CANON_TOOL_TABLE tool_entry_init();
 int find_tool_index_for_tool(int toolno);
 int get_tool_entry(CANON_TOOL_TABLE *tool, int index);
+int current_tool_index();
+int selected_tool_index();
 void select_tool(int toolno);
 void change_selected_tool();
 void change_tool_number(int index);

wasm-port/tests/native/verify_native_probes.sh

@@ -269,6 +269,11 @@ grep -Fq "inch_init=0" "$INIT_HARNESS_STDOUT"
 grep -Fq "inch_setup.length_units=1" "$INIT_HARNESS_STDOUT"
 grep -Fq "inch_external_length_units=0.0393701" "$INIT_HARNESS_STDOUT"
 grep -Fq "inch_canon_event=USE_LENGTH_UNITS units=1" "$INIT_HARNESS_STDOUT"
+grep -Fq "synch=0" "$INIT_HARNESS_STDOUT"
+grep -Fq "synch.current_pocket=2" "$INIT_HARNESS_STDOUT"
+grep -Fq "synch.selected_pocket=2" "$INIT_HARNESS_STDOUT"
+grep -Fq "synch.tool_0=2" "$INIT_HARNESS_STDOUT"
+grep -Fq "synch.tool_2=2" "$INIT_HARNESS_STDOUT"
 
 INDEXER_HARNESS_STDOUT="$BUILD_DIR/linuxcnc_indexer_harness.run.stdout.log"
 grep -Fq "execute=0" "$INDEXER_HARNESS_STDOUT"