Problems encountered in transplanting ucosii B OSStartHang

Then OSStart(); After entering
void OSStart (void)
{
if (OSRunning == OS_FALSE) {
OS_SchedNew(); 
OSPrioCur = OSPrioHighRdy;
OSTCBHighRdy = OSTCBPrioTbl[OSPrioHighRdy];
OSTCBCur = OSTCBHighRdy;
OSStartHighRdy(); 
} } Stop at the black bold, and find the position of OSStartHang B OSStartHang
in the assembly code .asm through debugging . After searching online, some netizens provided answers  about the solution of STM32F107VC _OSStartHang Problem: After transplanting UCOS-II, the program is always at  B OSStartHang, //According to the prompt, it should never reach this step. In fact, it is very simple, because the abnormal interrupt PendSV_Handler of STM32 itself replaces the abnormal interrupt OSPendSV of UCOS, making it unable to execute normally. So we need to change

PendSV_Handler is changed to OSPendSV to make the interrupt work properly.
The first type
Change startup_stm32f10x_cl.s (V3.5. version)
1. DCD PendSV_Handler; PendSV Handler
is changed to:
DCD OSPendSV; OSPendSV interrupt
2. PendSV_Handler PROC
EXPORT PendSV_Handler [WEAK]
B.
ENDP
is changed to:
OSPendSV PROC
EXPORT OSPendSV [WEAK]
B.
ENDP
The second type: —The interrupt vector table (entry address of the interrupt function) is defined in startup_stm32f10x_cl.s
—C language code of the interrupt service function in stm32f10x_it.c.
There are two sections of code in startup_stm32f10x_cl.s as follows:
DCD PendSV_Handler
DCD SysTick_Handler
The service functions in stm32f10x_it.c are as follows
void PendSV_Handler(void)
void SysTick_Handler(void)
1: The ucos system interrupt function is renamed PendSV_Handler, and the void PendSV_Handler(void) function in the stm32f10x_it.c file is commented out.
2: Add the following code to the void SysTick_Handler(void) function:
void SysTick_Handler(void)
{
OS_CPU_SR cpu_sr;
OS_ENTER_CRITICAL(); // Tell uC/OS-II that we are starting an ISR
OSIntNesting++;
OS_EXIT_CRITICAL();
OSTimeTick(); // Call uC/OS-II's OSTimeTick()
OSIntExit(); // Tell uC/OS-II that we are leaving the ISR
}
===
...

The one IAR5.4.
Refer to the above operation, it is already working, there are some differences. Use the startup_stm32f10x_cl.s V3.1.2 version.
DCD OSPendSV ; PendSV Handler
PUBWEAK OSPendSV
SECTION .text:CODE:REORDER(1)
OSPendSV
B OSPendSV