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#!/bin/sh
# Copyright (C) 2002, 2003, 2009, 2010 Free Software Foundation, Inc.
#
# This file is part of the GNU ISO C++ Library. This library is free
# software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the
# Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this library; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
if test ${#} -lt 2 || test $1 = '--help'; then
echo "Usage: extract_symvers shared_lib output_file" 1>&2
exit 1
fi
lib=$1
output=$2
# This avoids weird sorting problems later.
LC_ALL=C
export LC_ALL
LANG=C
export LANG
tmp=extract.$$
case `uname -s` in
SunOS)
# Sun ld doesn't record symbol versions in .dynsym entries and they
# cannot easily be extracted from readelf --versions output, so use pvs
# instead. Linux may have a completely different pvs from LVM2, so only
# do this on SunOS.
# Need to use nawk on Solaris 2 since Solaris 8/9 awk (oawk) cannot handle
# sub.
pvs -dsvo ${lib} | \
nawk '# Remove colon separator from version field, trailing semicolon.
{
sub (/:$/, "", $3);
sub (/;$/, "");
}
# Record base version. The [BASE] field was only added in Solaris 11,
# so simply use the first record instead.
NR == 1 {
basever = $3;
next;
}
# Ignore version dependencies.
$4 ~ /\{.*\}/ {
next;
}
NF == 4 {
if ($3 == $4 || $3 == basever)
# Emit versions or symbols bound to base versions as objects.
printf "OBJECT:0:%s\n", $4;
else
# Everything else without a size field is a function.
printf "FUNC:%s@@%s\n", $4, $3;
next;
}
# Emit objects.
NF == 5 {
# Strip parens from object size.
sub (/^\(/, "", $5);
sub (/\)$/, "", $5);
printf "OBJECT:%s:%s@@%s\n", $5, $4, $3;
next;
}' | sort | uniq > $tmp 2>&1
;;
*)
# GNU binutils, somewhere after version 2.11.2, requires -W/--wide to
# avoid default line truncation. -W is not supported and truncation did
# not occur by default before that point.
readelf="readelf --symbols"
if readelf --help | grep -- --wide > /dev/null; then
readelf="$readelf --wide"
fi
${readelf} ${lib} |\
sed -e 's/ \[<other>: [A-Fa-f0-9]*\] //' -e '/\.dynsym/,/^$/p;d' |\
egrep -v ' (LOCAL|UND) ' |\
awk '{ if ($4 == "FUNC" || $4 == "NOTYPE")
printf "%s:%s\n", $4, $8;
else if ($4 == "OBJECT" || $4 == "TLS")
printf "%s:%s:%s\n", $4, $3, $8;
}' | sort | uniq > $tmp 2>&1
# else printf "Huh? What is %s?\n", $8;
;;
esac
# I think we'll be doing some more with this file, but for now, dump.
mv $tmp $output
exit 0
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