Musl riscv-linux cross compiler objdump - how to produce source code for the library functions in the assembly output

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I use musl cross compiler made for riscv target to compile my program. When I use the cross compiler's objdump with -S flag, it produces the source code of the main program aligned with the corresponding assembly code. I want similar source code information for the library functions included in the code. For example, when I use "pthread_create" in the program, the objdump produces only the assembly code for the pthread_create function. It does not add the source code info. How do I enable that? Do I need to re-make the cross compiler? What flags do I need?

What I have tried:

I re-build the cross compiler with --enable-debug flag (source: GitHub - richfelker/musl-cross-make: Simple makefile-based build for musl cross compiler[^] )

Following are the compile commands I tried:

Shell

musl-riscv-linux-gcc -static -g pthread_code.c -o pthread_musl_debuginfo

Shell

musl-riscv-linux-objdump -x --source --full-contents -D -S pthread_musl_debuginfo > pthread_musl_debuginfo_objdump

Posted 13-Jul-24 16:50pm

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OriginalGriff · Answer 1 · 2024-07-13T18:35:00

You'd probably have to talk to the creators of the compiler and / or the library file. Unless the source is explicitly included in the library (which would be unusual) it can't be done as you want (it's not normal to generate C code from a DLL and it wouldn't be particularly readable anyway as it's almost certainly optimised when compiled).

Bear in mind that the original source code is probably somebody's IP and that they generally don't release that to anyone who just wants it!