Hello Wolfgang, James,
Thanks for the information. Yes, James your assumption about my knowledge on U-Boot internals is correct. I have used u-boot to bring up the OS, but this time I had to run a SA from u-boot, which requires more understanding of U-Boot internals.
Any chance that you are using an older and/or out-of-tree version of
U-Boot? We can only help you with mainline code...
I am using u-boot-linaro-stable version from linaro.
In my standalone application, some debugging messages(printfs) are added, which are not printing in one function and even the application is not terminating for any reason. Hence, suspecting the stack size.
Attach a debugger?
No debugger.
Here are my processor details, Panda board ES which uses OMAP4460 processor, 4GB SDRAM, starts at 0x80000000.
4 GB RAM is special, as mapping the whole RAM would consume the whole 32 bit address space. What is the exact version of U-Boot (git commit ID) you are running? And which exact board configuration?
I am using omap4_panda_config configuration, sorry only 1GB SDRAM is available by default.
I found that the THUMB mode and the optimization level(-O2) were creating the problem. My application executes fine with ARM mode and optimization level -O1.
Even the simple hello_world application running in thumb mode generates "undefined instruction" exception. By default CONFIG_SYS_THUMB_BUILD is enabled, any extra settings are required for smooth operation of THUMB mode?
Regards, Parimala