1#! /bin/sh 2 3# Add a .gdb_index section to a file. 4 5# Copyright (C) 2010-2019 Free Software Foundation, Inc. 6# This program is free software; you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation; either version 3 of the License, or 9# (at your option) any later version. 10# 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15# 16# You should have received a copy of the GNU General Public License 17# along with this program. If not, see <http://www.gnu.org/licenses/>. 18 19# This program assumes gdb and objcopy are in $PATH. 20# If not, or you want others, pass the following in the environment 21GDB=${GDB:=gdb} 22OBJCOPY=${OBJCOPY:=objcopy} 23 24myname="${0##*/}" 25 26dwarf5="" 27if [ "$1" = "-dwarf-5" ]; then 28 dwarf5="$1" 29 shift 30fi 31 32if test $# != 1; then 33 echo "usage: $myname [-dwarf-5] FILE" 1>&2 34 exit 1 35fi 36 37file="$1" 38 39if test ! -r "$file"; then 40 echo "$myname: unable to access: $file" 1>&2 41 exit 1 42fi 43 44dir="${file%/*}" 45test "$dir" = "$file" && dir="." 46index4="${file}.gdb-index" 47index5="${file}.debug_names" 48debugstr="${file}.debug_str" 49debugstrmerge="${file}.debug_str.merge" 50debugstrerr="${file}.debug_str.err" 51 52rm -f $index4 $index5 $debugstr $debugstrmerge $debugstrerr 53# Ensure intermediate index file is removed when we exit. 54trap "rm -f $index4 $index5 $debugstr $debugstrmerge $debugstrerr" 0 55 56$GDB --batch -nx -iex 'set auto-load no' \ 57 -ex "file $file" -ex "save gdb-index $dwarf5 $dir" || { 58 # Just in case. 59 status=$? 60 echo "$myname: gdb error generating index for $file" 1>&2 61 exit $status 62} 63 64# In some situations gdb can exit without creating an index. This is 65# not an error. 66# E.g., if $file is stripped. This behaviour is akin to stripping an 67# already stripped binary, it's a no-op. 68status=0 69 70if test -f "$index4" -a -f "$index5"; then 71 echo "$myname: Both index types were created for $file" 1>&2 72 status=1 73elif test -f "$index4" -o -f "$index5"; then 74 if test -f "$index4"; then 75 index="$index4" 76 section=".gdb_index" 77 else 78 index="$index5" 79 section=".debug_names" 80 fi 81 debugstradd=false 82 debugstrupdate=false 83 if test -s "$debugstr"; then 84 if ! $OBJCOPY --dump-section .debug_str="$debugstrmerge" "$file" /dev/null \ 85 2>$debugstrerr; then 86 cat >&2 $debugstrerr 87 exit 1 88 fi 89 if grep -q "can't dump section '.debug_str' - it does not exist" \ 90 $debugstrerr; then 91 debugstradd=true 92 else 93 debugstrupdate=true 94 cat >&2 $debugstrerr 95 fi 96 cat "$debugstr" >>"$debugstrmerge" 97 fi 98 99 $OBJCOPY --add-section $section="$index" \ 100 --set-section-flags $section=readonly \ 101 $(if $debugstradd; then \ 102 echo --add-section .debug_str="$debugstrmerge"; \ 103 echo --set-section-flags .debug_str=readonly; \ 104 fi; \ 105 if $debugstrupdate; then \ 106 echo --update-section .debug_str="$debugstrmerge"; \ 107 fi) \ 108 "$file" "$file" 109 110 status=$? 111else 112 echo "$myname: No index was created for $file" 1>&2 113 echo "$myname: [Was there no debuginfo? Was there already an index?]" 1>&2 114fi 115 116exit $status 117