Creat a simple bare-metal azurertos based on stm32mp135f-dk, get an error.

[sunfammer]

D:/ST/STM32CubeIDE/workspace_1.14.0/azure/Application/Debug/../Core/Src/tx_initialize_low_level.S:147: undefined reference to `_stack_bottom'

I config the project just with these simple steps, without any coding.

[Olivier GALLIEN]

Hi @sunfammer ,

Did you refer to following page ? 

Introduction to Azure RTOS® with STM32 - stm32mpu

Introduction to THREADX - stm32mpu

Let me know if it helps 

Olivier

[sunfammer]

Sorry, I can't find helps from these pages.

Or I missed some config option, I don't know where to find 

[Olivier GALLIEN]

Hi @sunfammer 

Reproduced at my end. 

Don't you get also issue with compilation around "-fcyclomatic-complexity" option first ? 

I need to remove it my side. 

Sorry for inconvenience, I escalate this and come back to you ASAP. 

Olivier 

[Olivier GALLIEN · Accepted solution]

Hi @sunfammer ,

Actually this is know issue reported as restriction in STM32CubeMX release 6.10.0 - Release note page 19 

When using the STM32CubeMP13 bare-metal firmware and activating Azure® RTOS
ThreadX, the STM32CubeIDE linker file must contain the following section to avoid
compilation issues:
.stack :
{
_stack_bottom = ABSOLUTE(.) ;
/* Allocate room for stack. This must be big enough for the
IRQ, FIQ, and SYS stack if nested interrupts are
enabled.*/
. = ALIGN(8) ;
. += 32768 ;
_sp = . - 16 ;
_stack_top = ABSOLUTE(.) ;
} >RAM
_end = .;

Olivier 

[sunfammer]

Thanks for your help, this error just like a bad dog stopping new guys enter the house.