From 2e955b934236b4be7f7802d9c3ebb3edbaab493a Mon Sep 17 00:00:00 2001
From: Eyck-Alexander Jentzsch <alex@minres.com>
Date: Tue, 10 Mar 2026 20:59:58 +0100
Subject: [PATCH] adds the generation of the offsetof defines to CMakeLists.txt
 As the offsets into the TX_THREAD are needed to access certain fields and the
 members for smp are quite difficult to obtain this was the safest option

---
 port/threadx_smp/CMakeLists.txt               | 40 ++++++++++++++++++-
 .../cmake/GenerateAsmOffsets.cmake            | 22 ++++++++++
 port/threadx_smp/src/tx_asm_offsets.c         | 14 +++++++
 3 files changed, 74 insertions(+), 2 deletions(-)
 create mode 100644 port/threadx_smp/cmake/GenerateAsmOffsets.cmake
 create mode 100644 port/threadx_smp/src/tx_asm_offsets.c

diff --git a/port/threadx_smp/CMakeLists.txt b/port/threadx_smp/CMakeLists.txt
index 3927344..87419a1 100644
--- a/port/threadx_smp/CMakeLists.txt
+++ b/port/threadx_smp/CMakeLists.txt
@@ -3,11 +3,19 @@ if(NOT EXISTS "${THREADX_COMMON_SMP_DIR}")
     message(FATAL_ERROR "could not find ThreadX SMP sources, is the submodule checked out?")
 endif()
 
-set(THREADX_SMP_CUSTOM_INC ${CMAKE_CURRENT_SOURCE_DIR}/inc ${CMAKE_CURRENT_SOURCE_DIR}/../moonlight)
+set(THREADX_SMP_CUSTOM_INC
+    ${CMAKE_CURRENT_SOURCE_DIR}/inc
+    ${CMAKE_CURRENT_SOURCE_DIR}/../moonlight
+)
 set(THREADX_SMP_CUSTOM_SRC
     src/tx_thread_smp_core_preempt.c
     src/tx_initialize_low_level.S
+    src/tx_thread_schedule.S
 )
+set(THREADX_SMP_GENERATED_INC_DIR ${CMAKE_CURRENT_BINARY_DIR}/generated)
+set(THREADX_SMP_OFFSET_SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/src/tx_asm_offsets.c)
+set(THREADX_SMP_OFFSET_ASM ${THREADX_SMP_GENERATED_INC_DIR}/tx_asm_offsets.s)
+set(THREADX_SMP_OFFSET_INC ${THREADX_SMP_GENERATED_INC_DIR}/tx_asm_offsets.inc)
 
 file(GLOB THREADX_SMP_SOURCES ${THREADX_COMMON_SMP_DIR}/src/*.c)
 add_library(threadx_smp STATIC)
@@ -19,8 +27,36 @@ target_include_directories(threadx_smp PUBLIC
     ${THREADX_COMMON_SMP_DIR}/inc
     ${THREADX_SMP_CUSTOM_INC}
 )
+target_include_directories(threadx_smp PRIVATE
+    ${THREADX_SMP_GENERATED_INC_DIR}
+)
 target_compile_definitions(threadx_smp PRIVATE -DTX_QUEUE_MESSAGE_MAX_SIZE=16) #This is addressed in PR #503
 
+add_custom_command(
+    OUTPUT ${THREADX_SMP_OFFSET_INC}
+    COMMAND ${CMAKE_COMMAND} -E make_directory ${THREADX_SMP_GENERATED_INC_DIR}
+    COMMAND ${CMAKE_C_COMPILER}
+            $<$<BOOL:$<TARGET_PROPERTY:threadx_smp,INCLUDE_DIRECTORIES>>:$<LIST:TRANSFORM,$<TARGET_PROPERTY:threadx_smp,INCLUDE_DIRECTORIES>,PREPEND,-I>>
+            $<$<BOOL:$<TARGET_PROPERTY:threadx_smp,COMPILE_DEFINITIONS>>:$<LIST:TRANSFORM,$<TARGET_PROPERTY:threadx_smp,COMPILE_DEFINITIONS>,PREPEND,-D>>
+            -S
+            -o ${THREADX_SMP_OFFSET_ASM}
+            ${THREADX_SMP_OFFSET_SOURCE}
+    COMMAND ${CMAKE_COMMAND}
+            -DINPUT=${THREADX_SMP_OFFSET_ASM}
+            -DOUTPUT=${THREADX_SMP_OFFSET_INC}
+            -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/GenerateAsmOffsets.cmake
+    DEPENDS
+        ${THREADX_SMP_OFFSET_SOURCE}
+        ${CMAKE_CURRENT_SOURCE_DIR}/cmake/GenerateAsmOffsets.cmake
+        ${CMAKE_CURRENT_SOURCE_DIR}/inc/tx_port.h
+        ${THREADX_COMMON_SMP_DIR}/inc/tx_api.h
+    COMMAND_EXPAND_LISTS
+    VERBATIM
+)
+
+add_custom_target(threadx_smp_offsets DEPENDS ${THREADX_SMP_OFFSET_INC})
+add_dependencies(threadx_smp threadx_smp_offsets)
+
 
 #Definition smp_demo
 project(smp_demo LANGUAGES C ASM)
@@ -33,4 +69,4 @@ target_link_libraries(smp_demo PRIVATE threadx_smp)
 
 target_sources(smp_demo PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../../src/thread_demo/main.c)
 
-#cmake -S . -B build -DCMAKE_TOOLCHAIN_FILE=$PWD/../../cmake/rv32gc_gnu.cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=YES
\ No newline at end of file
+#cmake -S . -B build -DCMAKE_TOOLCHAIN_FILE=$PWD/../../cmake/rv32gc_gnu.cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=YES
diff --git a/port/threadx_smp/cmake/GenerateAsmOffsets.cmake b/port/threadx_smp/cmake/GenerateAsmOffsets.cmake
new file mode 100644
index 0000000..9657e20
--- /dev/null
+++ b/port/threadx_smp/cmake/GenerateAsmOffsets.cmake
@@ -0,0 +1,22 @@
+if(NOT DEFINED INPUT)
+    message(FATAL_ERROR "INPUT is required")
+endif()
+
+if(NOT DEFINED OUTPUT)
+    message(FATAL_ERROR "OUTPUT is required")
+endif()
+
+file(STRINGS "${INPUT}" OFFSET_LINES REGEX "->")
+
+set(OFFSET_CONTENT "/* Generated by GenerateAsmOffsets.cmake. */\n")
+
+foreach(LINE IN LISTS OFFSET_LINES)
+    string(REGEX MATCH "->([A-Za-z0-9_]+)[^0-9-]*(-?[0-9]+)" _ "${LINE}")
+    if(NOT CMAKE_MATCH_1)
+        continue()
+    endif()
+
+    string(APPEND OFFSET_CONTENT "#define ${CMAKE_MATCH_1} ${CMAKE_MATCH_2}\n")
+endforeach()
+
+file(WRITE "${OUTPUT}" "${OFFSET_CONTENT}")
diff --git a/port/threadx_smp/src/tx_asm_offsets.c b/port/threadx_smp/src/tx_asm_offsets.c
new file mode 100644
index 0000000..1ec59fc
--- /dev/null
+++ b/port/threadx_smp/src/tx_asm_offsets.c
@@ -0,0 +1,14 @@
+#include <stddef.h>
+
+#include "tx_api.h"
+
+
+#define TX_ASM_OFFSET(symbol, value) __asm__ volatile("\n.ascii \"->" #symbol " %c0\\n\"" : : "i" (value))
+
+
+void tx_asm_offsets_generate(void)
+{
+    TX_ASM_OFFSET(TX_THREAD_STACK_END_OFFSET, offsetof(TX_THREAD, tx_thread_stack_end));
+    TX_ASM_OFFSET(TX_THREAD_TIME_SLICE_OFFSET, offsetof(TX_THREAD, tx_thread_time_slice));
+    TX_ASM_OFFSET(TX_THREAD_SMP_LOCK_READY_BIT_OFFSET, offsetof(TX_THREAD, tx_thread_smp_lock_ready_bit));
+}