[ARM] SC573 ARM core crashing when using rand()

Context:

• Using SC573 ezkit
• Using FreeRTOS10.4.6 with CCES 2.10.1 ARM toolchain running on SC573 ARM core.
• Using Clion rather than CCES IDE (pre-defined requirement)
• Have migrated the FreeRTOS port provided in https://www.analog.com/en/design-center/evaluation-hardware-and-software/software/freertos.html#software-overview to Clion
  • FreeRTOS standard demo building and running successfully on SC573 ezkit
• Using Cmake with ninja generator and ADI arm-none-eabi-gcc to build the bsp and application
• Using ADI arm-none-eabi-gdb and OpenOCD for debugging (in Clion)
  • using the following cfg files for OpenOCD
    • source [find interface/ice1000.cfg]
    • source [find board/adspsc573_ezkit.cfg]
• Using linker script provided by ADI for linker script
  • /opt/analog/cces/2.10.1/ARM/arm-none-eabi/arm-none-eabi/lib/ldscripts/adsp-sc573-l3.ld
  • let me know if I should be using adsp-sc573-l2.ld instead
• Cmake flags 
  
  • -g

    -gdwarf-2

    -mcpu=cortex-a5

    -mabi=aapcs

    -mfloat-abi=hard

    -MMD # same as above but only uses user header files

    -MP # Emits dummy dependency rules

    -MF # specifies file name for the makefile dependency rule (MMD)

    -msi-revision=any #silicon revision

    -mproc=ADSP-SC573

    -D__ADI_FREERTOS #enables the freeRTOS version of osal functions, which are used by BSP libraries

    -DADI_DEBUG

    -mdebug-libs

    -lm

    -D__ADSP215xx__

    -DCORE0

    -Wl,--gc-sections -madi-threads -mdebug-libs -lm

    --specs=${CMAKE_CURRENT_LIST_DIR}/third_party/bsp/SC573/FreeRTOS/portable/ARM_CA5/freertos.specs

    -fdata-sections # Generates one ELF section for each variable

    -ffunction-sections # Generates one ELF section for each function

Problem

Currently trying to port LWIP over to FreeRTOS and am basing my port off a old port from CCES 2.8.3. I am experiencing a crash when I try and call LWIP_RAND() which is defined as rand(). I assume rand() is the function in arm-none-eabi/include/stdlib.h and is implemented in libc.a? I'm not sure why it would be causing a crash. Can you please have a look and let me know what I'm missing?

LWIP_RAND() is defined as rand()

Stack at time of crash

funcion where rand() is being used

disassmbly for rand()

disassembly for adi_rtl_get_tls_ptr: (only a snippet of it below)

disassembly for adi_fatal_error

Cheers,
Yan