-#!/bin/sh
+#!/bin/bash
#find-debuginfo.sh - automagically generate debug info and file list
#for inclusion in an rpm spec file.
+#
+# Usage: find-debuginfo.sh [--strict-build-id] [--strip-disable] [--strip-option] [-g] [-r]
+# [-o debugfiles.list]
+# [[-l filelist]... [-p 'pattern'] -o debuginfo.list]
+# [builddir]
+#
+# The -g flag says to use strip -g instead of full strip on DSOs.
+# The --strict-build-id flag says to exit with failure status if
+# any ELF binary processed fails to contain a build-id note.
+# The -r flag says to use eu-strip --reloc-debug-sections.
+#
+# A single -o switch before any -l or -p switches simply renames
+# the primary output file from debugfiles.list to something else.
+# A -o switch that follows a -p switch or some -l switches produces
+# an additional output file with the debuginfo for the files in
+# the -l filelist file, or whose names match the -p pattern.
+# The -p argument is an grep -E -style regexp matching the a file name,
+# and must not use anchors (^ or $).
+#
+# All file names in switches are relative to builddir (. if not given).
+#
-LISTFILE=debugfiles.list
+# With -g arg, pass it to strip on libraries.
+strip_g=false
-# Strip ELF binaries
-for f in `find $RPM_BUILD_ROOT -type f \( -perm -0100 -or -perm -0010 -or -perm -0001 \) -exec file {} \; | \
- sed -n -e 's/^\(.*\):[ ]*ELF.*, not stripped/\1/p'`; do
- BASEDIR=`dirname $f | sed -n -e "s#^$RPM_BUILD_ROOT#/#p"`
- OUTPUTDIR=${RPM_BUILD_ROOT}/usr/lib/debug${BASEDIR}
- mkdir -p ${OUTPUTDIR}
- echo extracting debug info from $f
- striptofile -g -u -o $OUTPUTDIR $f || :
+# with -r arg, pass --reloc-debug-sections to eu-strip.
+strip_r=false
+
+# Barf on missing build IDs.
+strict=false
+
+# With --strip-disable arg, no strip
+strip_disable=false
+
+# With --strip-option arg, this will be used as arg. of eu-strip
+strip_option=
+
+BUILDDIR=.
+out=debugfiles.list
+nout=0
+while [ $# -gt 0 ]; do
+ case "$1" in
+ --strict-build-id)
+ strict=true
+ ;;
+ --strip-disable)
+ strip_disable=true
+ ;;
+ *--strip-option*)
+ strip_option=$(echo $1 | sed 's/--strip-option=//')
+ ;;
+ -g)
+ strip_g=true
+ ;;
+ -o)
+ if [ -z "${lists[$nout]}" -a -z "${ptns[$nout]}" ]; then
+ out=$2
+ else
+ outs[$nout]=$2
+ ((nout++))
+ fi
+ shift
+ ;;
+ -l)
+ lists[$nout]="${lists[$nout]} $2"
+ shift
+ ;;
+ -p)
+ ptns[$nout]=$2
+ shift
+ ;;
+ -r)
+ strip_r=true
+ ;;
+ *)
+ BUILDDIR=$1
+ shift
+ break
+ ;;
+ esac
+ shift
done
-find ${RPM_BUILD_ROOT}/usr/lib/debug -type f | sed -n -e "s#^$RPM_BUILD_ROOT#/#p" > $LISTFILE
+i=0
+while ((i < nout)); do
+ outs[$i]="$BUILDDIR/${outs[$i]}"
+ l=''
+ for f in ${lists[$i]}; do
+ l="$l $BUILDDIR/$f"
+ done
+ lists[$i]=$l
+ ((++i))
+done
+
+LISTFILE="$BUILDDIR/$out"
+SOURCEFILE="$BUILDDIR/debugsources.list"
+LINKSFILE="$BUILDDIR/debuglinks.list"
+
+> "$SOURCEFILE"
+> "$LISTFILE"
+> "$LINKSFILE"
+
+debugdir="${RPM_BUILD_ROOT}/usr/lib/debug"
+
+strip_to_debug()
+{
+ local g=
+ local r=
+
+ if test "$strip_disable" = true ; then
+ exit
+ fi
+
+ $strip_r && r=--reloc-debug-sections
+ $strip_g && case "$(file -bi "$2")" in
+ application/x-sharedlib*) g=-g ;;
+ esac
+
+ case $2 in
+ *.ko)
+ # don't attempt to create a minimal backtrace binary for
+ # kernel modules as this just causes the stripping process
+ # to be skipped entirely
+ eu-strip --remove-comment $r $strip_option -f "$1" "$2" || exit
+ ;;
+ *)
+ strip --remove-section=.comment $g $strip_option -o "$1" "$2" || exit
+ esac
+ chmod 444 "$1" || exit
+}
+
+# Make a relative symlink to $1 called $3$2
+shopt -s extglob
+link_relative()
+{
+ local t="$1" f="$2" pfx="$3"
+ local fn="${f#/}" tn="${t#/}"
+ local fd td d
+
+ while fd="${fn%%/*}"; td="${tn%%/*}"; [ "$fd" = "$td" ]; do
+ fn="${fn#*/}"
+ tn="${tn#*/}"
+ done
+
+ d="${fn%/*}"
+ if [ "$d" != "$fn" ]; then
+ d="${d//+([!\/])/..}"
+ tn="${d}/${tn}"
+ fi
+
+ mkdir -p "$(dirname "$pfx$f")" && ln -snf "$tn" "$pfx$f"
+}
+
+# Make a symlink in /usr/lib/debug/$2 to $1
+debug_link()
+{
+ local l="/usr/lib/debug$2"
+ local t="$1"
+ echo >> "$LINKSFILE" "$l $t"
+
+ # this should correspond to what brp-symlink is doing
+ case $t in
+ /usr*)
+ link_relative "$t" "$l" "$RPM_BUILD_ROOT"
+ ;;
+ *)
+ if [ ! -e $t ]; then
+ link_relative "$t" "$l" "$RPM_BUILD_ROOT"
+ else
+ mkdir -p "$(dirname "$RPM_BUILD_ROOT$l")" && \
+ ln -snf "$t" "$RPM_BUILD_ROOT$l"
+ fi
+ ;;
+ esac
+}
+
+# Provide .2, .3, ... symlinks to all filename instances of this build-id.
+make_id_dup_link()
+{
+ # See https://bugzilla.redhat.com/show_bug.cgi?id=641377 for the reasoning,
+ # but it has seveal drawbacks as we would need to split the .1 suffixes into
+ # different subpackages and it's about impossible to predict the number
+ # -> perhaps later
+ return
+ local id="$1" file="$2" idfile
+
+ local n=1
+ while true; do
+ idfile=".build-id/${id:0:2}/${id:2}.$n"
+ [ $# -eq 3 ] && idfile="${idfile}$3"
+ if [ ! -L "$RPM_BUILD_ROOT/usr/lib/debug/$idfile" ]; then
+ break
+ fi
+ n=$[$n+1]
+ done
+ debug_link "$file" "/$idfile"
+}
+
+# Compare two binaries but ignore the .note.gnu.build-id section
+elfcmp()
+{
+ local tmp1=$(mktemp -t ${1##*/}.XXXXXX)
+ local tmp2=$(mktemp -t ${2##*/}.XXXXXX)
+
+ objcopy -R .note.gnu.build-id -R .gnu_debuglink $1 $tmp1
+ objcopy -R .note.gnu.build-id -R .gnu_debuglink $2 $tmp2
+ cmp -s $tmp1 $tmp2
+ local res=$?
+ rm -f $tmp1 $tmp2
+ return $res
+}
+
+# Make a build-id symlink for id $1 with suffix $3 to file $2.
+make_id_link()
+{
+ local id="$1" file="$2"
+ local idfile=".build-id/${id:0:2}/${id:2}"
+ [ $# -eq 3 ] && idfile="${idfile}$3"
+ local root_idfile="$RPM_BUILD_ROOT/usr/lib/debug/$idfile"
+
+ if [ ! -L "$root_idfile" ]; then
+ debug_link "$file" "/$idfile"
+ return
+ fi
+
+ make_id_dup_link "$@"
+
+ [ $# -eq 3 ] && return 0
+
+ local other=$(readlink -m "$root_idfile")
+ other=${other#$RPM_BUILD_ROOT}
+ if cmp -s "$RPM_BUILD_ROOT$other" "$RPM_BUILD_ROOT$file" ||
+ elfcmp "$RPM_BUILD_ROOT$other" "$RPM_BUILD_ROOT$file" ; then
+ # Two copies. Maybe one has to be setuid or something.
+ echo >&2 "*** WARNING: identical binaries are copied, not linked:"
+ echo >&2 " $file"
+ echo >&2 " and $other"
+ else
+ # This is pathological, break the build.
+ echo >&2 "*** ERROR: same build ID in nonidentical files!"
+ echo >&2 " $file"
+ echo >&2 " and $other"
+ exit 2
+ fi
+}
+
+get_debugfn()
+{
+ dn=$(dirname "${1#$RPM_BUILD_ROOT}")
+# Do not strip existing .debug suffixes
+ bn=$(basename "$1").debug
+
+ debugdn=${debugdir}${dn}
+ debugfn=${debugdn}/${bn}
+}
+
+set -o pipefail
+
+strict_error=ERROR
+$strict || strict_error=WARNING
+
+# Strip ELF binaries (and no static libraries)
+find $RPM_BUILD_ROOT ! -path "${debugdir}/*.debug" -type f \( -perm /111 -or -name "*.so*" -or -name "*.ko" \) ! -name "*.a" -print0 | sort -z |
+xargs --no-run-if-empty -0 stat -c '%h %D_%i %n' |
+while read nlinks inum f; do
+ case $(objdump -h $f 2>/dev/null | egrep -o '(debug[\.a-z_]*|gnu.version)') in
+ *debuglink*) continue ;;
+ *debug*) ;;
+ *gnu.version*)
+ echo "WARNING: "`echo $f | sed -e "s,^$RPM_BUILD_ROOT/*,/,"`" is already stripped!"
+ continue
+ ;;
+ *) continue ;;
+ esac
+ get_debugfn "$f"
+ [ -f "${debugfn}" ] && continue
+
+ # If this file has multiple links, keep track and make
+ # the corresponding .debug files all links to one file too.
+ if [ $nlinks -gt 1 ]; then
+ eval linked=\$linked_$inum
+ if [ -n "$linked" ]; then
+ eval id=\$linkedid_$inum
+ make_id_dup_link "$id" "$dn/$(basename $f)"
+ make_id_dup_link "$id" "/usr/lib/debug$dn/$bn" .debug
+ link=$debugfn
+ get_debugfn "$linked"
+ echo "hard linked $link to $debugfn"
+ mkdir -p "$(dirname "$link")" && ln -nf "$debugfn" "$link"
+ continue
+ else
+ eval linked_$inum=\$f
+ echo "file $f has $[$nlinks - 1] other hard links"
+ fi
+ fi
+
+ echo "extracting debug info from $f"
+ id=$($(DEBUGEDIT=$(which debugedit 2>/dev/null); \
+ echo ${DEBUGEDIT:-/usr/lib/rpm/debugedit}) -b "$RPM_BUILD_DIR" \
+ -d /usr/src/debug -i -l "$SOURCEFILE" "$f") || exit
+ if [ $nlinks -gt 1 ]; then
+ eval linkedid_$inum=\$id
+ fi
+ if [ -z "$id" ]; then
+ echo >&2 "*** ${strict_error}: No build ID note found in $f"
+ $strict && exit 2
+ fi
+
+ [ -x /usr/bin/gdb-add-index ] && /usr/bin/gdb-add-index "$f" > /dev/null 2>&1
+
+ # A binary already copied into /usr/lib/debug doesn't get stripped,
+ # just has its file names collected and adjusted.
+ case "$dn" in
+ /usr/lib/debug/*)
+ [ -z "$id" ] || make_id_link "$id" "$dn/$(basename $f)"
+ continue ;;
+ esac
+
+ mkdir -p "${debugdn}"
+ if [ -e "${BUILDDIR}/Kconfig" ] ; then
+ mode=$(stat -c %a "$f")
+ chmod +w "$f"
+ objcopy --only-keep-debug $f $debugfn || :
+ (
+ shopt -s extglob
+ strip_option="--strip-all"
+ case "$f" in
+ *.ko)
+ strip_option="--strip-debug" ;;
+ *$STRIP_KEEP_SYMTAB*)
+ if test -n "$STRIP_KEEP_SYMTAB"; then
+ strip_option="--strip-debug"
+ fi
+ ;;
+ esac
+ if test "$NO_DEBUGINFO_STRIP_DEBUG" = true ; then
+ strip_option=
+ fi
+ if test "$strip_disable" = true ; then
+ strip_option=
+ fi
+ objcopy --add-gnu-debuglink=$debugfn -R .comment -R .GCC.command.line $strip_option $f
+ chmod $mode $f
+ ) || :
+ else
+ if test -w "$f"; then
+ strip_to_debug "${debugfn}" "$f"
+ else
+ chmod u+w "$f"
+ strip_to_debug "${debugfn}" "$f"
+ chmod u-w "$f"
+ fi
+ fi
+
+ if [ -n "$id" ]; then
+ make_id_link "$id" "$dn/$(basename $f)"
+ make_id_link "$id" "/usr/lib/debug$dn/$bn" .debug
+ fi
+done || exit
+
+# We used to make a .debug symlink for each symlink whose target
+# has a .debug file to that file. This is not necessary because
+# the debuglink section contains only the destination of those links.
+# Creating those links anyway results in debuginfo packages for
+# devel packages just because of the .so symlinks in them.
+
+if [ -s "$SOURCEFILE" ]; then
+ mkdir -p "${RPM_BUILD_ROOT}/usr/src/debug"
+ LC_ALL=C sort -z -u "$SOURCEFILE" | grep -E -v -z '(<internal>|<built-in>)$' |
+ (cd "$RPM_BUILD_DIR"; cpio -pd0mL "${RPM_BUILD_ROOT}/usr/src/debug")
+ # stupid cpio creates new directories in mode 0700, fixup
+ find "${RPM_BUILD_ROOT}/usr/src/debug" -type d -print0 |
+ xargs --no-run-if-empty -0 chmod a+rx
+ find "${RPM_BUILD_ROOT}/usr/src/debug" -type f -print0 |
+ xargs --no-run-if-empty -0 chmod a+r
+fi
+
+if [ -d "${RPM_BUILD_ROOT}/usr/lib" -o -d "${RPM_BUILD_ROOT}/usr/src" ]; then
+ ((nout > 0)) ||
+ test ! -d "${RPM_BUILD_ROOT}/usr/lib" ||
+ (cd "${RPM_BUILD_ROOT}/usr/lib"; test ! -d debug || find debug -type d) |
+ sed 's,^,%dir /usr/lib/,' >> "$LISTFILE"
+
+ (cd "${RPM_BUILD_ROOT}/usr"
+ test ! -d lib/debug || find lib/debug ! -type d
+ ) | sed 's,^,/usr/,' >> "$LISTFILE"
+fi
+
+: > "$SOURCEFILE"
+if [ -d "${RPM_BUILD_ROOT}/usr/src" ]; then
+ (cd "${RPM_BUILD_ROOT}/usr"
+ test ! -d src/debug || find src/debug -mindepth 1 -maxdepth 1
+ ) | sed 's,^,/usr/,' >> "$SOURCEFILE"
+fi
+
+# Append to $1 only the lines from stdin not already in the file.
+append_uniq()
+{
+ grep -F -f "$1" -x -v >> "$1"
+}
+
+# Helper to generate list of corresponding .debug files from a file list.
+filelist_debugfiles()
+{
+ local extra="$1"
+ shift
+ sed 's/^%[a-z0-9_][a-z0-9_]*([^)]*) *//
+s/^%[a-z0-9_][a-z0-9_]* *//
+/^$/d
+'"$extra" "$@"
+}
+
+# Write an output debuginfo file list based on given input file lists.
+filtered_list()
+{
+ local out="$1"
+ shift
+ test $# -gt 0 || return
+ grep -F -f <(filelist_debugfiles 's,^.*$,/usr/lib/debug&.debug,' "$@") \
+ -x $LISTFILE >> $out
+ sed -n -f <(filelist_debugfiles 's/[\\.*+#]/\\&/g
+h
+s,^.*$,s# &$##p,p
+g
+s,^.*$,s# /usr/lib/debug&.debug$##p,p
+' "$@") "$LINKSFILE" | append_uniq "$out"
+}
+
+# Write an output debuginfo file list based on an grep -E -style regexp.
+pattern_list()
+{
+ local out="$1" ptn="$2"
+ test -n "$ptn" || return
+ grep -E -x -e "$ptn" "$LISTFILE" >> "$out"
+ sed -n -r "\#^$ptn #s/ .*\$//p" "$LINKSFILE" | append_uniq "$out"
+}
+
+#
+# When given multiple -o switches, split up the output as directed.
+#
+i=0
+while ((i < nout)); do
+ > ${outs[$i]}
+ filtered_list ${outs[$i]} ${lists[$i]}
+ pattern_list ${outs[$i]} "${ptns[$i]}"
+ grep -Fvx -f ${outs[$i]} "$LISTFILE" > "${LISTFILE}.new"
+ mv "${LISTFILE}.new" "$LISTFILE"
+ ((++i))
+done
+if ((nout > 0)); then
+ # Now add the right %dir lines to each output list.
+ (cd "${RPM_BUILD_ROOT}"; find usr/lib/debug -type d) |
+ sed 's#^.*$#\\@^/&/@{h;s@^.*$@%dir /&@p;g;}#' |
+ LC_ALL=C sort -ur > "${LISTFILE}.dirs.sed"
+ i=0
+ while ((i < nout)); do
+ sed -n -f "${LISTFILE}.dirs.sed" "${outs[$i]}" | sort -u > "${outs[$i]}.new"
+ cat "${outs[$i]}" >> "${outs[$i]}.new"
+ mv -f "${outs[$i]}.new" "${outs[$i]}"
+ ((++i))
+ done
+ sed -n -f "${LISTFILE}.dirs.sed" "${LISTFILE}" | sort -u > "${LISTFILE}.new"
+ cat "$LISTFILE" >> "${LISTFILE}.new"
+ mv "${LISTFILE}.new" "$LISTFILE"
+fi
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