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Date: Wed, 31 Dec 2014 17:43:06 +0100 From: Sylvain BERTRAND <sylvain.bertrand@...il.com> To: x86@...nel.org Cc: linux-kernel@...r.kernel.org Subject: [PATCH v2 1/3] x86: tools: shell-ify calc_run_size perl-ism Add the shell script. Signed-off-by: Sylvain BERTRAND <sylvain.bertrand@...il.com> --- --- arch/x86/tools/calc_run_size.sh +++ arch/x86/tools/calc_run_size.sh @@ -0,0 +1,46 @@ +#!/bin/sh +# +# Calculate the amount of space needed to run the kernel, including room for +# the .bss and .brk sections. +# +# Usage: +# objdump -h a.out | sh calc_run_size.sh + +set -e + +file_offset=0 +mem_size=0 + +while read Idx Name Size_hex VMA_hex LMA_hex File_off_hex Algn +do + if [ "$Name" = ".bss" -o "$Name" = ".brk" ]; then + Size=$((0x$Size_hex)) + File_off=$((0x$File_off_hex)) + + mem_size=$(($mem_size + $Size)) + + if [ $file_offset -eq 0 ]; then + file_offset=$File_off + elif [ $file_offset -ne $File_off ]; then + # BFD linker shows the same file offset in ELF. + # Gold linker shows them as consecutive. + if [ $(($file_offset + $mem_size)) -eq $(($File_off + $Size)) ]; then + continue + fi + + printf "file_offset: 0x%x\n" $file_offset >&2 + printf "mem_size: 0x%x\n" $mem_size >&2 + printf "offset: 0x%x\n" $File_off >&2 + printf "size: 0x%x\n" $Size >&2 + + echo ".bss and .brk are non-contiguous" >&2 + exit 1 + fi + fi +done + +if [ $file_offset -eq 0 ]; then + echo "Never found .bss or .brk file offset" >&2 + exit 1 +fi +printf "%d\n" $(($mem_size + $file_offset)) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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