9059ab425a
Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/7766)
417 lines
11 KiB
Perl
Executable file
417 lines
11 KiB
Perl
Executable file
#! /usr/bin/env perl
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# Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
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#
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# Licensed under the Apache License 2.0 (the "License"). You may not use
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# this file except in compliance with the License. You can obtain a copy
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# in the file LICENSE in the source distribution or at
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# https://www.openssl.org/source/license.html
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# Generate a linker version script suitable for the given platform
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# from a given ordinals file.
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use strict;
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use warnings;
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use Getopt::Long;
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use FindBin;
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use lib "$FindBin::Bin/perl";
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use OpenSSL::Ordinals;
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use lib '.';
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use configdata;
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my $name = undef; # internal library/module name
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my $ordinals_file = undef; # the ordinals file to use
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my $version = undef; # the version to use for the library
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my $OS = undef; # the operating system family
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my $verbose = 0;
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my $ctest = 0;
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# For VMS, some modules may have case insensitive names
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my $case_insensitive = 0;
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GetOptions('name=s' => \$name,
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'ordinals=s' => \$ordinals_file,
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'version=s' => \$version,
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'OS=s' => \$OS,
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'ctest' => \$ctest,
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'verbose' => \$verbose,
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# For VMS
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'case-insensitive' => \$case_insensitive)
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or die "Error in command line arguments\n";
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die "Please supply arguments\n"
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unless $name && $ordinals_file && $OS;
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# When building a "variant" shared library, with a custom SONAME, also customize
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# all the symbol versions. This produces a shared object that can coexist
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# without conflict in the same address space as a default build, or an object
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# with a different variant tag.
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#
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# For example, with a target definition that includes:
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#
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# shlib_variant => "-opt",
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#
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# we build the following objects:
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#
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# $ perl -le '
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# for (@ARGV) {
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# if ($l = readlink) {
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# printf "%s -> %s\n", $_, $l
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# } else {
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# print
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# }
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# }' *.so*
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# libcrypto-opt.so.1.1
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# libcrypto.so -> libcrypto-opt.so.1.1
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# libssl-opt.so.1.1
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# libssl.so -> libssl-opt.so.1.1
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#
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# whose SONAMEs and dependencies are:
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#
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# $ for l in *.so; do
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# echo $l
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# readelf -d $l | egrep 'SONAME|NEEDED.*(ssl|crypto)'
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# done
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# libcrypto.so
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# 0x000000000000000e (SONAME) Library soname: [libcrypto-opt.so.1.1]
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# libssl.so
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# 0x0000000000000001 (NEEDED) Shared library: [libcrypto-opt.so.1.1]
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# 0x000000000000000e (SONAME) Library soname: [libssl-opt.so.1.1]
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#
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# We case-fold the variant tag to upper case and replace all non-alnum
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# characters with "_". This yields the following symbol versions:
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#
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# $ nm libcrypto.so | grep -w A
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# 0000000000000000 A OPENSSL_OPT_1_1_0
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# 0000000000000000 A OPENSSL_OPT_1_1_0a
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# 0000000000000000 A OPENSSL_OPT_1_1_0c
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# 0000000000000000 A OPENSSL_OPT_1_1_0d
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# 0000000000000000 A OPENSSL_OPT_1_1_0f
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# 0000000000000000 A OPENSSL_OPT_1_1_0g
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# $ nm libssl.so | grep -w A
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# 0000000000000000 A OPENSSL_OPT_1_1_0
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# 0000000000000000 A OPENSSL_OPT_1_1_0d
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#
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(my $SO_VARIANT = uc($target{"shlib_variant"} // '')) =~ s/\W/_/g;
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my $apiv = undef;
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$apiv = sprintf "%x%02x%02x", split(/\./, $config{api})
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if $config{api};
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my $libname = $unified_info{sharednames}->{$name} // $name;
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my %OS_data = (
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solaris => { writer => \&writer_linux,
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sort => sorter_linux(),
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platforms => { UNIX => 1,
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EXPORT_VAR_AS_FUNCTION => 0 } },
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linux => 'solaris', # alias
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"bsd-gcc" => 'solaris', # alias
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aix => { writer => \&writer_aix,
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sort => sorter_unix(),
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platforms => { UNIX => 1,
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EXPORT_VAR_AS_FUNCTION => 0 } },
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VMS => { writer => \&writer_VMS,
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sort => OpenSSL::Ordinals::by_number(),
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platforms => { VMS => 1,
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EXPORT_VAR_AS_FUNCTION => 0 } },
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vms => 'VMS', # alias
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WINDOWS => { writer => \&writer_windows,
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sort => OpenSSL::Ordinals::by_name(),
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platforms => { WIN32 => 1,
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_WIN32 => 1,
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EXPORT_VAR_AS_FUNCTION => 1 } },
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windows => 'WINDOWS', # alias
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WIN32 => 'WINDOWS', # alias
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win32 => 'WIN32', # alias
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32 => 'WIN32', # alias
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NT => 'WIN32', # alias
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nt => 'WIN32', # alias
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mingw => 'WINDOWS', # alias
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);
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do {
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die "Unknown operating system family $OS\n"
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unless exists $OS_data{$OS};
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$OS = $OS_data{$OS};
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} while(ref($OS) eq '');
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my %disabled_uc = map { my $x = uc $_; $x =~ s|-|_|g; $x => 1 } keys %disabled;
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my %ordinal_opts = ();
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$ordinal_opts{sort} = $OS->{sort} if $OS->{sort};
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$ordinal_opts{filter} =
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sub {
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my $item = shift;
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return
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$item->exists()
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&& platform_filter($item)
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&& feature_filter($item);
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};
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my $ordinals = OpenSSL::Ordinals->new(from => $ordinals_file);
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my $writer = $OS->{writer};
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$writer = \&writer_ctest if $ctest;
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$writer->($ordinals->items(%ordinal_opts));
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exit 0;
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sub platform_filter {
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my $item = shift;
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my %platforms = ( $item->platforms() );
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# True if no platforms are defined
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return 1 if scalar keys %platforms == 0;
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# For any item platform tag, return the equivalence with the
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# current platform settings if it exists there, return 0 otherwise
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# if the item platform tag is true
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for (keys %platforms) {
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if (exists $OS->{platforms}->{$_}) {
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return $platforms{$_} == $OS->{platforms}->{$_};
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}
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if ($platforms{$_}) {
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return 0;
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}
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}
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# Found no match? Then it's a go
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return 1;
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}
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sub feature_filter {
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my $item = shift;
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my @features = ( $item->features() );
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# True if no features are defined
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return 1 if scalar @features == 0;
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my $verdict = ! grep { $disabled_uc{$_} } @features;
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if ($apiv) {
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foreach (@features) {
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next unless /^DEPRECATEDIN_(\d+)(?:_(\d+)_(\d+))?$/;
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my $symdep = sprintf "%x%02x%02x", $1, ($2 // 0), ($3 // 0);
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$verdict = 0 if $apiv ge $symdep;
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}
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}
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return $verdict;
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}
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sub sorter_unix {
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my $by_name = OpenSSL::Ordinals::by_name();
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my %weight = (
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'FUNCTION' => 1,
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'VARIABLE' => 2
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);
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return sub {
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my $item1 = shift;
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my $item2 = shift;
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my $verdict = $weight{$item1->type()} <=> $weight{$item2->type()};
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if ($verdict == 0) {
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$verdict = $by_name->($item1, $item2);
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}
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return $verdict;
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};
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}
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sub sorter_linux {
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my $by_version = OpenSSL::Ordinals::by_version();
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my $by_unix = sorter_unix();
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return sub {
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my $item1 = shift;
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my $item2 = shift;
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my $verdict = $by_version->($item1, $item2);
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if ($verdict == 0) {
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$verdict = $by_unix->($item1, $item2);
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}
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return $verdict;
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};
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}
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sub writer_linux {
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my $thisversion = '';
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my $currversion_s = '';
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my $prevversion_s = '';
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my $indent = 0;
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for (@_) {
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if ($thisversion && $_->version() ne $thisversion) {
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die "$ordinals_file: It doesn't make sense to have both versioned ",
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"and unversioned symbols"
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if $thisversion eq '*';
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print <<"_____";
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}${prevversion_s};
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_____
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$prevversion_s = " OPENSSL${SO_VARIANT}_$thisversion";
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$thisversion = ''; # Trigger start of next section
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}
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unless ($thisversion) {
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$indent = 0;
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$thisversion = $_->version();
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$currversion_s = '';
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$currversion_s = "OPENSSL${SO_VARIANT}_$thisversion "
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if $thisversion ne '*';
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print <<"_____";
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${currversion_s}{
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global:
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_____
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}
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print ' ', $_->name(), ";\n";
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}
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print <<"_____";
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local: *;
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}${prevversion_s};
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_____
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}
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sub writer_aix {
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for (@_) {
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print $_->name(),"\n";
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}
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}
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sub writer_windows {
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print <<"_____";
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;
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; Definition file for the DLL version of the $libname library from OpenSSL
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;
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LIBRARY $libname
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EXPORTS
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_____
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for (@_) {
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print " ",$_->name(),"\n";
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}
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}
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sub collect_VMS_mixedcase {
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return [ 'SPARE', 'SPARE' ] unless @_;
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my $s = shift;
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my $s_uc = uc($s);
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my $type = shift;
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return [ "$s=$type", 'SPARE' ] if $s_uc eq $s;
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return [ "$s_uc/$s=$type", "$s=$type" ];
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}
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sub collect_VMS_uppercase {
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return [ 'SPARE' ] unless @_;
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my $s = shift;
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my $s_uc = uc($s);
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my $type = shift;
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return [ "$s_uc=$type" ];
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}
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sub writer_VMS {
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my @slot_collection = ();
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my $collector =
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$case_insensitive ? \&collect_VMS_uppercase : \&collect_VMS_mixedcase;
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my $last_num = 0;
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foreach (@_) {
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while (++$last_num < $_->number()) {
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push @slot_collection, $collector->(); # Just occupy a slot
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}
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my $type = {
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FUNCTION => 'PROCEDURE',
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VARIABLE => 'DATA'
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} -> {$_->type()};
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push @slot_collection, $collector->($_->name(), $type);
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}
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print <<"_____" if defined $version;
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IDENTIFICATION=$version
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_____
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print <<"_____" unless $case_insensitive;
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CASE_SENSITIVE=YES
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_____
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print <<"_____";
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SYMBOL_VECTOR=(-
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_____
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# It's uncertain how long aggregated lines the linker can handle,
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# but it has been observed that at least 1024 characters is ok.
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# Either way, this means that we need to keep track of the total
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# line length of each "SYMBOL_VECTOR" statement. Fortunately, we
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# can have more than one of those...
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my $symvtextcount = 16; # The length of "SYMBOL_VECTOR=("
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while (@slot_collection) {
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my $set = shift @slot_collection;
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my $settextlength = 0;
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foreach (@$set) {
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$settextlength +=
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+ 3 # two space indentation and comma
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+ length($_)
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+ 1 # postdent
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;
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}
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$settextlength--; # only one space indentation on the first one
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my $firstcomma = ',';
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if ($symvtextcount + $settextlength > 1024) {
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print <<"_____";
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)
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SYMBOL_VECTOR=(-
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_____
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$symvtextcount = 16; # The length of "SYMBOL_VECTOR=("
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}
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if ($symvtextcount == 16) {
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$firstcomma = '';
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}
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my $indent = ' '.$firstcomma;
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foreach (@$set) {
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print <<"_____";
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$indent$_ -
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_____
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$symvtextcount += length($indent) + length($_) + 1;
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$indent = ' ,';
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}
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}
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print <<"_____";
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)
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_____
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if (defined $version) {
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my ($libvmajor, $libvminor) = $version =~ /^(\d+)_(\d+)$/;
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print <<"_____";
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GSMATCH=LEQUAL,$libvmajor,$libvminor;
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_____
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}
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}
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sub writer_ctest {
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print <<'_____';
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/*
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* Test file to check all DEF file symbols are present by trying
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* to link to all of them. This is *not* intended to be run!
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*/
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int main()
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{
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_____
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for (@_) {
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if ($_->type() eq 'VARIABLE') {
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print "\textern int ", $_->name(), '; /* type unknown */ /* ', $_->number(), ' ', $_->version(), " */\n";
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} else {
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print "\textern int ", $_->name(), '(); /* type unknown */ /* ', $_->number(), ' ', $_->version(), " */\n";
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}
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}
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print <<'_____';
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}
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_____
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}
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