On 28.11.23 01:19, Kirspel, Kevin wrote:
I’m trying to create a BSP for a NIOS V/m running on a Cyclone 10 LP Eval Kit. The NIOS V/m is a rv32ia/ilp32 architecture so I had to patch the RSB to add that multilib. I have a Hello World app compiled but I get exceptions when having the tick timer interrupt enabled. So, I disabled the tick timer interrupt and was able to get to the Init() task. When execution the hello world printf, I get another exception related to puts_r in newlib. The exception is occurring when trying to load the address of _tls_stdout. I traced this back to THREAD_LOCAL_STORAGE being enabled in newlib for the RISC V. Does the BSP have to do anything to setup thread local storage or does this happen automatically when triggered? The exception occurs after it returns from __sinit which I guess is initializes the thread local storage.
On RISC-V this should work out of the box. Do you have your own BSP? Maybe a memory setup / linker script issue.
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