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|
#! /usr/bin/env perl
# Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
# Generate a linker version script suitable for the given platform
# from a given ordinals file.
use strict;
use warnings;
use Getopt::Long;
use FindBin;
use lib "$FindBin::Bin/perl";
use OpenSSL::Ordinals;
use lib '.';
use configdata;
my $name = undef; # internal library/module name
my $ordinals_file = undef; # the ordinals file to use
my $version = undef; # the version to use for the library
my $OS = undef; # the operating system family
my $verbose = 0;
my $ctest = 0;
# For VMS, some modules may have case insensitive names
my $case_insensitive = 0;
GetOptions('name=s' => \$name,
'ordinals=s' => \$ordinals_file,
'version=s' => \$version,
'OS=s' => \$OS,
'ctest' => \$ctest,
'verbose' => \$verbose,
# For VMS
'case-insensitive' => \$case_insensitive)
or die "Error in command line arguments\n";
die "Please supply arguments\n"
unless $name && $ordinals_file && $OS;
# When building a "variant" shared library, with a custom SONAME, also customize
# all the symbol versions. This produces a shared object that can coexist
# without conflict in the same address space as a default build, or an object
# with a different variant tag.
#
# For example, with a target definition that includes:
#
# shlib_variant => "-opt",
#
# we build the following objects:
#
# $ perl -le '
# for (@ARGV) {
# if ($l = readlink) {
# printf "%s -> %s\n", $_, $l
# } else {
# print
# }
# }' *.so*
# libcrypto-opt.so.1.1
# libcrypto.so -> libcrypto-opt.so.1.1
# libssl-opt.so.1.1
# libssl.so -> libssl-opt.so.1.1
#
# whose SONAMEs and dependencies are:
#
# $ for l in *.so; do
# echo $l
# readelf -d $l | egrep 'SONAME|NEEDED.*(ssl|crypto)'
# done
# libcrypto.so
# 0x000000000000000e (SONAME) Library soname: [libcrypto-opt.so.1.1]
# libssl.so
# 0x0000000000000001 (NEEDED) Shared library: [libcrypto-opt.so.1.1]
# 0x000000000000000e (SONAME) Library soname: [libssl-opt.so.1.1]
#
# We case-fold the variant tag to upper case and replace all non-alnum
# characters with "_". This yields the following symbol versions:
#
# $ nm libcrypto.so | grep -w A
# 0000000000000000 A OPENSSL_OPT_1_1_0
# 0000000000000000 A OPENSSL_OPT_1_1_0a
# 0000000000000000 A OPENSSL_OPT_1_1_0c
# 0000000000000000 A OPENSSL_OPT_1_1_0d
# 0000000000000000 A OPENSSL_OPT_1_1_0f
# 0000000000000000 A OPENSSL_OPT_1_1_0g
# $ nm libssl.so | grep -w A
# 0000000000000000 A OPENSSL_OPT_1_1_0
# 0000000000000000 A OPENSSL_OPT_1_1_0d
#
(my $SO_VARIANT = uc($target{"shlib_variant"} // '')) =~ s/\W/_/g;
my $apiv = undef;
$apiv = sprintf "%x%02x%02x", split(/\./, $config{api})
if $config{api};
my $libname = $unified_info{sharednames}->{$name} // $name;
my %OS_data = (
solaris => { writer => \&writer_linux,
sort => sorter_linux(),
platforms => { UNIX => 1,
EXPORT_VAR_AS_FUNCTION => 0 } },
linux => 'solaris', # alias
"bsd-gcc" => 'solaris', # alias
aix => { writer => \&writer_aix,
sort => sorter_unix(),
platforms => { UNIX => 1,
EXPORT_VAR_AS_FUNCTION => 0 } },
VMS => { writer => \&writer_VMS,
sort => OpenSSL::Ordinals::by_number(),
platforms => { VMS => 1,
EXPORT_VAR_AS_FUNCTION => 0 } },
vms => 'VMS', # alias
WINDOWS => { writer => \&writer_windows,
sort => OpenSSL::Ordinals::by_name(),
platforms => { WIN32 => 1,
_WIN32 => 1,
EXPORT_VAR_AS_FUNCTION => 1 } },
windows => 'WINDOWS', # alias
WIN32 => 'WINDOWS', # alias
win32 => 'WIN32', # alias
32 => 'WIN32', # alias
NT => 'WIN32', # alias
nt => 'WIN32', # alias
mingw => 'WINDOWS', # alias
);
do {
die "Unknown operating system family $OS\n"
unless exists $OS_data{$OS};
$OS = $OS_data{$OS};
} while(ref($OS) eq '');
my %disabled_uc = map { my $x = uc $_; $x =~ s|-|_|g; $x => 1 } keys %disabled;
my %ordinal_opts = ();
$ordinal_opts{sort} = $OS->{sort} if $OS->{sort};
$ordinal_opts{filter} =
sub {
my $item = shift;
return
$item->exists()
&& platform_filter($item)
&& feature_filter($item);
};
my $ordinals = OpenSSL::Ordinals->new(from => $ordinals_file);
my $writer = $OS->{writer};
$writer = \&writer_ctest if $ctest;
$writer->($ordinals->items(%ordinal_opts));
exit 0;
sub platform_filter {
my $item = shift;
my %platforms = ( $item->platforms() );
# True if no platforms are defined
return 1 if scalar keys %platforms == 0;
# For any item platform tag, return the equivalence with the
# current platform settings if it exists there, return 0 otherwise
# if the item platform tag is true
for (keys %platforms) {
if (exists $OS->{platforms}->{$_}) {
return $platforms{$_} == $OS->{platforms}->{$_};
}
if ($platforms{$_}) {
return 0;
}
}
# Found no match? Then it's a go
return 1;
}
sub feature_filter {
my $item = shift;
my @features = ( $item->features() );
# True if no features are defined
return 1 if scalar @features == 0;
my $verdict = ! grep { $disabled_uc{$_} } @features;
if ($apiv) {
foreach (@features) {
next unless /^DEPRECATEDIN_(\d+)(?:_(\d+)_(\d+))?$/;
my $symdep = sprintf "%x%02x%02x", $1, ($2 // 0), ($3 // 0);
$verdict = 0 if $apiv ge $symdep;
}
}
return $verdict;
}
sub sorter_unix {
my $by_name = OpenSSL::Ordinals::by_name();
my %weight = (
'FUNCTION' => 1,
'VARIABLE' => 2
);
return sub {
my $item1 = shift;
my $item2 = shift;
my $verdict = $weight{$item1->type()} <=> $weight{$item2->type()};
if ($verdict == 0) {
$verdict = $by_name->($item1, $item2);
}
return $verdict;
};
}
sub sorter_linux {
my $by_version = OpenSSL::Ordinals::by_version();
my $by_unix = sorter_unix();
return sub {
my $item1 = shift;
my $item2 = shift;
my $verdict = $by_version->($item1, $item2);
if ($verdict == 0) {
$verdict = $by_unix->($item1, $item2);
}
return $verdict;
};
}
sub writer_linux {
my $thisversion = '';
my $currversion_s = '';
my $prevversion_s = '';
my $indent = 0;
for (@_) {
if ($thisversion && $_->version() ne $thisversion) {
die "$ordinals_file: It doesn't make sense to have both versioned ",
"and unversioned symbols"
if $thisversion eq '*';
print <<"_____";
}${prevversion_s};
_____
$prevversion_s = " OPENSSL${SO_VARIANT}_$thisversion"
|