Hardfault in memset during startup of Zigbee stack

[patbra]

Hi

Im trying to set up a project for development of a Zigbee / BLE based product. For that product, we use our own platform and SDK which includes the nordic nRF5 SDK for Thread and Zigbee. We use FreeRTOS in our platform, so therefore, I have chosen "examples/zigbee/experimental/multi_sensor_freertos" as a starting point for my application. 

We use our own build system, based on GNU Make, so therefore I have looked at the file "examples/zigbee/experimental/multi_sensor_freertos/pca10056/blank/armgcc/Makefile", and I have tried to get everything in there to match my own build.

The project compiles and starts, but during initialization of the Zigbee stack, I get a hardfault when using memset() in zb_init_configurable_mem(). 

I have tried to use memset() in main.c and it works as expected. Any ideas of what I have missed?

Thank you,

/Patrik

[Marte Myrvold]

Hi Patrik,

Could you please share what you're using memset() for, and possibly a code snippet of where you're using it, just to see what you're doing? This would make it easier to try and figure out what it is that is failing.

Best regards,

Marte

[patbra]

Hi

I am not using memset(). It seems like it is used from the Zigbee stack in function zb_init_configurable_mem() according to the call stack I provided. 

/Patrik

[Marte Myrvold]

Hi Patrik,

The Zigbee team is still trying to figure this out. Could you please share which linker you're using, and whether you're using other compiler or linker options than what is already present in the example in the SDK?

Best regards,

Marte

[patbra]

Hi

We are using the this toolchain: https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads/9-2020-q2-update. 

The linker script is "zigbee_multi_sensor_freertos_gcc_nrf52.ld". One note about the linker script, is that I was not able to include the nrf_common.ld file. Then I get the following:

c:/mbs/work/rf-network/mbstoolchains/gcc-arm-none-eabi-9-2020-q2/bin/../lib/gcc/arm-none-eabi/9.3.1/../../../../arm-none-eabi/bin/ld.exe: cannot open linker script file nrf_common.ld: No such file or directory
collect2.exe: error: ld returned 1 exit status
make: *** [/cygdrive/c/mbs/work/rf-network/products/multi_sensor_freertos2/abs-binary.mk:22: _output/products-multi_sensor_freertos2/NRF52_GCC-none-none-mbs_nrf_52840_v10/products-multi_sensor_freertos2.elf] Error 1

Instead I copied the contents of the file where the include was. 

I have tried to experiment with the compiler and linker options, but unmodified, this is what we use in our platform:

CFLAGS:

-mthumb \
-mcpu=cortex-m4 \
-ffunction-sections \
-fdata-sections \
-mfloat-abi=hard -mfpu=fpv4-sp-d16 \
-ggdb3 \
-std=gnu11 \
-O0

LDFLAGS:

-mthumb \
-mcpu=cortex-m4 \
-mfloat-abi=hard -mfpu=fpv4-sp-d16 \
-lc -lm \
--specs=nano.specs \
-Wl,--gc-sections \
-ggdb3

/Patrik

[Marte Myrvold]

Hi Patrik,

Thank you, I have forwarded this to the Zigbee team.

Best regards,

Marte

[Marte Myrvold]

Hi Patrik,

Could you please check the linker command? The ZBOSS library must be placed at the end of the command.

Best regards,

Marte

[patbra]

Hi

Is this really correct? The ZBOSS library is not in the end of the linker command, but if I try to make it the other way, it doesn't link. And your Makefile looks like this:

# Libraries common to all targets
LIB_FILES += \
  $(SDK_ROOT)/external/zboss/lib/gcc/libzboss.ed.a \
  $(SDK_ROOT)/external/zboss/lib/gcc/nrf52840/nrf_radio_driver.a \
  
...  

# Add standard libraries at the very end of the linker input, after all objects
# that may need symbols provided by these libraries.
LIB_FILES += -lc -lnosys -lm -lstdc++

Regards,

Patrik

[Marte Myrvold]

Hi Patrik,

I have asked the Zigbee team for a clarification on this.

Best regards,

Marte

[Marte Myrvold]

Hi Patrik,

I got a response from them now. You should place the ZBOSS library after the object files in the linker command, so that when the linker looks for symbols, it doesn't take weak ones from the ZBOSS library.

Best regards,

Marte

[patbra]

Yes this is how it is. The libraries (including ZBOSS) comes after the object files in the linker command. 

/Patrik

[Marte Myrvold]

Hi,

Our Zigbee team has seen some suspicious behavior when copying the content of the nrf_common.ld to the examples linker script. Could you please try reverting these changes and instead add the path to the nrf_common.ld script to the linker flags? It should be something like this, just align the path: "LDFLAGS += -L$(SDK_ROOT)/modules/nrfx/mdk"

Best regards,

Marte