How to acquire backtrace in no_std environment?

I am working in an RTOS project with RISC-V cpu.

I need to compile the Rust code with no_std, so backtrace is not natively available.

The project is compiled into a ELF, then use objcopy to get only the loadable segments,
then loaded inside Linux kernel by the kernel request_firmware() API.

How can I print the back trace of the program in Rust?
The backtrace should includes the symbol name and symbol address.

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