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61 lines
1.4 KiB
Bash
Executable File
61 lines
1.4 KiB
Bash
Executable File
#!/bin/bash
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#
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# Generate MiniDebugInfo data (in the '.gnu_debugdata' section)
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#
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set -e
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# Check we have the required arguments
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if [[ $# -ne 2 ]]; then
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cat >2 <<EOF
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usage: make-minidebug <input> <output>
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Extract debug information from <input> and generate a new version, <output>,
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containing a compressed '.gnu_debugdata' section.
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Requires xz be installed on your machine.
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EOF
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exit 1
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fi
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# Grab the arguments
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input=$1
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output=$2
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# Check for the tools we need
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for tool in nm comm objcopy xz strip; do
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if ! $(which $tool >/dev/null); then
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echo "make-minidebug: $tool not installed."
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exit 1
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fi
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done
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# Create a temporary directory to work in
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tempdir=$(mktemp -d -t tmp.XXXXXXXXXXX)
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function cleanup {
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rm -rf "$tempdir"
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}
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trap cleanup EXIT
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# Actually construct the MiniDebug section
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nm -D "$input" --format=posix --defined-only \
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| awk '{ print $1 }' | sort > "$tempdir/dynsyms"
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nm "$input" --format=posix --defined-only \
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| awk '$2 ~ /[TtD]/ { print $1 }' \
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| sort > "$tempdir/funcsyms"
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comm -13 "$tempdir/dynsyms" "$tempdir/funcsyms" > "$tempdir/keepsyms"
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objcopy --only-keep-debug \
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--remove-section .gdb_index \
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--remove-section .comment \
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--keep-symbols="$tempdir/keepsyms" \
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"$input" "$tempdir/minidbginfo"
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xz "$tempdir/minidbginfo"
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objcopy -S --remove-section .comment \
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--add-section .gnu_debugdata="$tempdir/minidbginfo.xz" \
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"$input" "$output"
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