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140 lines
4.2 KiB
Raku
140 lines
4.2 KiB
Raku
#!/usr/bin/perl -w
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# Copyright (C) 2010-2024 Free Software Foundation, Inc.
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#
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# This file is part of the GNU ISO C++ Library. This library is free
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# software; you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 3, or (at your option)
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# any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this library; see the file COPYING3. If not see
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# <http://www.gnu.org/licenses/>.
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# Extract symbol version information on Solaris 2.
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#
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# Sun ld doesn't record symbol versions in .dynsym entries and they cannot
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# easily be extracted from readelf --versions output, so use pvs instead.
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# This way, we don't require GNU binutils in the native case. Also ensures
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# that baseline_symbols.txt is identical between native (pvs, elfdump) and
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# cross (readelf) cases.
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my $lib = shift;
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open PVS, "pvs -dsvo $lib |" or die $!;
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while (<PVS>) {
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chomp;
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# Remove trailing semicolon.
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s/;$//;
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# shared object, dash, version, symbol, [size]
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(undef, undef, $version, $symbol, $size) = split;
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# Remove colon separator from version field.
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$version =~ s/:$//;
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# Record base version. The [BASE] field was only added in Solaris 11,
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# so simply use the first record instead.
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if ($. == 1) {
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$basever = $version;
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next;
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}
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# Skip version declarations.
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next unless defined ($symbol);
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# Ignore version dependencies.
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next if ($symbol =~ /\{.*\}/);
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# Emit objects.
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if (defined ($size)) {
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# Strip parens from object size.
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$size =~ s/\((\d+)\)/$1/;
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$type{$symbol} = "OBJECT";
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$version{$symbol} = $version;
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$size{$symbol} = $size;
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next;
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}
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if ($version eq $symbol or $version eq $basever) {
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# Emit versions or symbols bound to base versions as objects.
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$type{$symbol} = "OBJECT";
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if ($version eq $basever) {
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$version{$symbol} = $version;
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} else {
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$version{$symbol} = $symbol;
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}
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$size{$symbol} = 0;
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} else {
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# Everything else without a size field is a function.
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$type{$symbol} = "FUNC";
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$version{$symbol} = $version;
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}
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}
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close PVS or die "pvs error";
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# Only look at .dynsym table, like readelf in extract_symvers.
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# Ignore error output to avoid getting confused by
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# .gnu.version_r: zero sh_entsize information, expected 0x1
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# warning with Solaris 11 elfdump on gld-produced shared objects.
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open ELFDUMP, "/usr/ccs/bin/elfdump -s -N .dynsym $lib 2>/dev/null |" or die $!;
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while (<ELFDUMP>) {
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chomp;
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# Ignore empty lines.
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next if (/^$/);
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# Ignore object name header.
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next if (/:$/);
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# Ignore table header lines.
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next if (/^Symbol Table Section:/);
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next if (/index.*value.*size/);
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# Split table.
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(undef, undef, undef, $type, $bind, $oth, undef, $shndx, $name) = split;
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# Error out for unknown input.
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die "unknown input line:\n$_" unless defined($bind);
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# Ignore local symbols.
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next if ($bind eq "LOCL");
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# Ignore hidden symbols.
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next if ($oth eq "H");
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# Ignore undefined symbols.
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next if ($shndx eq "UNDEF");
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# Error out for unhandled cases. _GLOBAL_OFFSET_TABLE_ is P (protected).
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die "unhandled symbol:\n$_" if ($bind !~ /^(GLOB|WEAK)/ or $oth !~ /[DP]/);
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# Adapt to readelf type naming convention.
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$type = "NOTYPE" if ($type eq "NOTY");
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$type = "OBJECT" if ($type eq "OBJT");
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# Use correct symbol type.
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$type{$name} = $type if ($type{$name} ne $type);
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}
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close ELFDUMP or die "elfdump error";
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foreach $symbol (keys %type) {
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if ($type{$symbol} eq "FUNC" || $type{$symbol} eq "NOTYPE") {
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push @lines, "$type{$symbol}:$symbol\@\@$version{$symbol}\n";
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} elsif ($type{$symbol} eq "OBJECT" and $size{$symbol} == 0) {
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# Omit symbols bound to base version; details can differ depending
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# on the toolchain used.
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next if $version{$symbol} eq $basever;
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push @lines, "$type{$symbol}:$size{$symbol}:$version{$symbol}\n";
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} else {
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push @lines, "$type{$symbol}:$size{$symbol}:$symbol\@\@$version{$symbol}\n";
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}
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}
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print sort @lines;
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