Change log since v5.0.2 release:

Kernel

• kservice: Use C89 format to avoid warnings; Fix start address misalignment issue; Remove malloc scheduler lock, fix incorrect use of memheap lock; Add MT-safe console support
• rtdef: Add rt_always_inline operation function
• cpu: Optimize CPU scheduler
• thread: Remove thread reference count
• rthw: Add rt_hw_interrupt_uninstall declaration
• Add hooks for malloc service; Support hook lists (add multiple hooks in a single hook node)
• Optimize system scheduler; Improve rt_vsnprintf
• Prohibit nested blocking IPC interfaces such as free, malloc inside spinlock
• Rename RT_DEBUGING_INIT to RT_DEBUGING_AUTO_INIT
• Define standard spinlock to require scheduler to be disabled, all external spinlocks use disable/enable scheduler mode
• Add RT_USING_NANO macro, support BSP one-click switch to Nano version
• Add functionality to release mutex locks when deleting threads
• Add support for controlling configuration of rt_sem to set the maximum value of semaphore
• Add RV64 RTOS kernel backtrace support; Add ARM64, RV64 implementations
• Add thread creation function time slice parameter check
• Add scons compilation to display project space usage information (#8697)
• Add abstract layer of scheduler (rt_sched), optimize SMP performance (#8537)
• Fix SMP mode software timer repeated triggering issue
• Fix rt_slist_for_each_entry macro cannot traverse elements in slist linked list normally issue
• Fix thread cannot be reclaimed error; Fix deadlock issue of repeatedly obtaining spinlock in SMP mode rt_timer timer check and timer start
• Fix software timer sleep issue; Fix idle_hook_list not locked issue; Fix thread exit system function possible issue
• Fix issue of only being able to schedule two threads with the same priority
• Fix data race issue of accessing percpu object data; Fix rt_exit_critical_safe function error return issue
• Fix SIGNAL node allocation failure return error issue

Component

• Drivers
  • core: Adapt and optimize new device driver model; Fix issue where some device drivers could not enter the probe function after registration
  • usb: rt_size_t follows UNIX style, changed to rt_ssize_t
  • virtio: qemu-virt64-aarch64 / qemu-virt64-riscv support SDL2
  • i2c: Add generic software simulation I2C; Add device tree support
  • spi: Fix qspi configuration not taking effect issue
  • sdio: Add rt_mmcsd_fops_flush(block_dev) function
  • rtc: Fix rt_soft_rtc_sync function warning issue caused by using deprecated declaration method
  • clk: Add clk driver framework, preparing for full use of device tree
  • pwm: Add console secondary command completion feature
  • can: Optimize can close order (#8780)
  • serial: Add tty name allocation mechanism when using dm, support more baud rates; Add tty related hook functions; Add serial framework device tree support; Fix serial_v2 memory leak issue; Fix virtual serial port data can only be successfully sent once issue
  • pic: Add pic-gic support
  • pinctrl: Add pinctrl/pin-irqchip support
  • hwtimer: Improve Cortex®-a, ARMv8 driver
• DFS
  • Add exfat configuration;
  • dfs_v1: Fix assertion bug caused by FATFS file system using cat command
  • dfs_v2:
    • Update Smart kernel to default dfsv2; Update elmfat version from r14b to r15
    • Support O_DIRECT and O_SYNC flags
    • Fix dfs_dentry_lookup resolving file path issue
    • Fix dfs_tmpfs_write error; Fix dfs_v2 dfs_romfs_getdents buffer overflow issue
    • Fix potential heap buffer overflow issue in dfs_v2 dfs_file
    • Fix transfer fd under dfs_v2, dentry or vnode not existing issue; Fix lwp_free timer recovery call issue
    • Fix permissions issue in elm; Fix page cache issue; Fix unmounted mqueue issue
    • Add dfs pwrite pread (#8672); Add ptyfs support (#8672)
    • Add symbolic link, regular file management and other features (#8672)
    • Add sys_utimensat function; Add cromfs symbolic link (#8132)
    • Add cromfs mmap support (#8218)
• Libc
  • Fix difftime function multiple definitions issue in MDK compilation environment
  • Fix data race issue in shared counter ID list; Fix compatibility issue of ctime.c file with old drivers
  • Fix macro redefinition issue in eventfd due to toolchain update
  • Fix logic error in posix thread local storage search for posix thread handle
  • Fix issue of adding legacy macros when unable to get IAR version
  • Improve gcc picolibc; Further optimize epoll and timerfd
  • Add RT_USING_INTERNAL_LIBC_ONLY macro; Add GCC generic atomic operation functionality (#8648)
• LWP
  • Add sys_setitimer function
  • Replace lwp_new function with lwp_create; Replace irq disable/enable code in futex; Replace off_t with size_t in lwp_syscall.c
  • Fix CPU affinity setting issue; Fix rt_channel internal lock issue; Fix pid recycling issue; Fix init process signal protection flag setting (#8797)
  • Enable automatic selection of LDSO and pcache options by default after enabling smart/lwp options
  • Update AF_UNIX bind and connect entry, update AF_UNIX data structure sockaddr_un to standard structure
• MM
  • Add reserved memory support; Add rt_aspace_mremap_range function implementation
  • Fix issue of using released memory in aspace_traversal; Fix issue of page_install function on shadow region
• Net
  • Fix wifi scan command duplication issue (#8666)
  • at: Optimize at formatting output to avoid conflicts between multiple at client and server outputs; Optimize AT component, and fix potential memory leak issue
  • lwip: Fix possible deadlock issue under SMP
  • sal: Add ifconfig updown function; Add message quantity limit; Update SAL socket abstraction layer, improve socketpair, sendmsg, recvmsg functionality
• Finsh
  • Optimize list_thread display; Optimize MSH macro definition
  • Add finsh thread stack size check; Add finsh thread entry hook function
• FAL
  • Add blocks mechanism for fal, support adding special block definitions
• MProtect
  • Add MPU abstraction layer design, support ARMv7-M, ARMv8-M architecture
• Others
  • Synchronize differences in kernel, file system, etc.; Remove vmm
  • Fix -Wmissing-prototypes warning

Libcpu

• AARCH64: Fix kernel entry symbol; Fix trace information not visible issue under ulog environment; Use device tree to initialize CPU and memory; Improve IRQ disable/enable performance
• ARM: Add support for Cortex®-M85, Cortex®-R52 architectures; Fix abnormal SMP operation issue in Cortex®-A (#8517)
• RISC-V: Fix d1s smart build failure issue (#8212)
• Fix mmap support
• Support for the overall backtrace framework in the RT-Thread kernel; Added weak implementation of architecture-level backtrace service; Added support for RV64 architecture
• Standardize the Libcpu group name as libcpu

Tools

• Support for LLVMEmbeddedToolchainForArm-17.0.1 toolchain
• Added scons --target=vsc/--pack=xxx command; Added prebuilding operation
• Fixed rtconfig.h file recognition issue in MPU in scripts
• rt_studio: Fixed missing {cross_toolchain_flags} field issue when importing bsp projects in rt-studio
• env: Fixed built-in python2 subprocess issue

action

• Fixed Doxygen CI issue
• Added CI monitoring for BSP
• Added bsp attach check CI

utest

• Added memory system test cases; Added serial_v2 framework test cases; Added mm test cases; Added scheduler test cases

BSP

• Improved several bsp driver files; Fixed some issues in bsp
• RT-Smart support: DFZU2EG MPSoC, cv181x-riscv
• STM32: STM32 G0, G4, L0, L4 series support one-click switch to RT-Thread Nano version; STM32 Nucleo series added board-level identification macros; STM32 series added Nano version attach config related CI
• RTduino support: raspberry-pico, stm32h503-st-nucleo, stm32h563-st-nucleo, stm32f412-nucleo, stm32f407-rt-spark
• Added some new BSP:
  • Adafruit：Metro M4
  • Seeed Studio：Wio-Terminal
  • ST：stm32L431_tencentos、stm32h7s7-disco，stm32f407-lckfb-skystar、stm32h503-st-nucleo
  • Renesas：ek-ra8m1、ek-ra8d1、ra8d1-vision-board
  • AT32：at32f402-start、at32f405-start
  • HT32：ht32f52352、ht32f12366
  • AVR32：at32uc3a0256、at32uc3b0256
  • CVITEK： c906_little、cv18xx_risc-v
  • WCH：yd-ch32v307vct6(risc-v)
  • HC32：ev_hc32f4a0_lqfp176、ev_hc32f460_lqfp100_v2、ev_hc32f448_lqfp80
  • GD32：gd32407v-lckfb
  • NXP：
    • mcxn：frdm-mcxn947
    • mcxa：frdm-mcxa153

Userapps

• Fixed issue where the timer would not run when the user space retrieves the current time and then retrieves it again in kernel space, resulting in a negative difference
• Default enabling of epoll/eventfd/signalfd/timerfd/select when using RT-Smart
• Removed prebuilt versions
• Fixed setitimer bug, improved FUTEX support
• Added support for RT-Smart terminal subsystem (#8672)
• Other updates: ssh, sftp, weston, vim...