linux - Which section does objdump disassemble by default -

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i building bare metal executeable, contains special sections containing code. however, when objdump -d code .text , .init.text sections. manpage objdump says "only disassembles sections expected contain instructions" when using -d option. sections these, , how objdump tell sections decode? know can use -d option full decoding of sections, more need.

objdump internally uses libbfd section information. objdump passes callback bfd_map_over_sections() calls callback on each section. when called, libbfd passes asection * callback, has member type. if type contains flags sec_contents | sec_code gets disassembled objdump when -d option passed.

getting libbfd quite harder, expect type detection depends on architecture, hope gave @ least right pointer. (probably when having more time i'll dig more , extend answer)..

btw, if need script filter out sections of interest objdump -d might use sed, this:

# ------------place section names here ---------------vvv  objdump -d object.o | sed -rn '/disassembly of.*\.(comment|text)/{:a;p;n;/disassembly of/!ba}'

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