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Re: simplest way to get the size of an output section


On Mon, Oct 04, 2004 at 11:51:01AM +0200, Etienne Lorrain wrote:
>   Hello,
> 
>   On a Linux ia32 system, I am trying to get the size of an output
>  section of an ELF file to use it automatically in a Makefile.
> 
>  Ideally I would like to compile a small GCC program like:
> gcc -Wl,--defsym,linker_tells_size=SIZEOF(.text16) print_command_line.c
>  but that will not work because --defsym cannot get the SIZEOF().
> 
>  So I have gone the objcopy way:
> objcopy --output-target binary --only-section .text16 vmlinux param.bin
> ./print_command_line ` cat param.bin | wc -c `
>  That does the job, but is there a way to not create the temporary file
>  "param.bin" (i.e. objcopy uses standard output) (because it is always
>  a problem in Makefiles: it may already exist and be write protected,
>  it needs to be cleaned by make clean, an interrupted make command
>  may leave the temporary file...) or another way, without using too
>  complex awk or sed scripts?

Why not use objdump -h or readelf -S?

-- 
Daniel Jacobowitz


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