You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
334 lines
8.8 KiB
334 lines
8.8 KiB
#!/usr/bin/perl -w
|
|
|
|
# make_sunver.pl
|
|
#
|
|
# This script takes at least two arguments, a GNU style version script and
|
|
# a list of object and archive files, and generates a corresponding Sun
|
|
# style version script as follows:
|
|
#
|
|
# Each glob pattern, C++ mangled pattern or literal in the input script is
|
|
# matched against all global symbols in the input objects, emitting those
|
|
# that matched (or nothing if no match was found).
|
|
# A comment with the original pattern and its type is left in the output
|
|
# file to make it easy to understand the matches.
|
|
#
|
|
# It uses elfdump when present (native), GNU readelf otherwise.
|
|
# It depends on the GNU version of c++filt, since it must understand the
|
|
# GNU mangling style.
|
|
|
|
use FileHandle;
|
|
use IPC::Open2;
|
|
|
|
# Enforce C locale.
|
|
$ENV{'LC_ALL'} = "C";
|
|
$ENV{'LANG'} = "C";
|
|
|
|
# Input version script, GNU style.
|
|
my $symvers = shift;
|
|
|
|
##########
|
|
# Get all the symbols from the library, match them, and add them to a hash.
|
|
|
|
my %sym_hash = ();
|
|
|
|
# List of objects and archives to process.
|
|
my @OBJECTS = ();
|
|
|
|
# List of shared objects to omit from processing.
|
|
my @SHAREDOBJS = ();
|
|
|
|
# Filter out those input archives that have corresponding shared objects to
|
|
# avoid adding all symbols matched in the archive to the output map.
|
|
foreach $file (@ARGV) {
|
|
if (($so = $file) =~ s/\.a$/.so/ && -e $so) {
|
|
printf STDERR "omitted $file -> $so\n";
|
|
push (@SHAREDOBJS, $so);
|
|
} else {
|
|
push (@OBJECTS, $file);
|
|
}
|
|
}
|
|
|
|
# We need to detect and ignore hidden symbols. Solaris nm can only detect
|
|
# this in the harder to parse default output format, and GNU nm not at all,
|
|
# so use elfdump -s in the native case and GNU readelf -s otherwise.
|
|
# GNU objdump -t cannot be used since it produces a variable number of
|
|
# columns.
|
|
|
|
# The path to elfdump.
|
|
my $elfdump = "/usr/ccs/bin/elfdump";
|
|
|
|
if (-f $elfdump) {
|
|
open ELFDUMP,$elfdump.' -s '.(join ' ',@OBJECTS).'|' or die $!;
|
|
my $skip_arsym = 0;
|
|
|
|
while (<ELFDUMP>) {
|
|
chomp;
|
|
|
|
# Ignore empty lines.
|
|
if (/^$/) {
|
|
# End of archive symbol table, stop skipping.
|
|
$skip_arsym = 0 if $skip_arsym;
|
|
next;
|
|
}
|
|
|
|
# Keep skipping until end of archive symbol table.
|
|
next if ($skip_arsym);
|
|
|
|
# Ignore object name header for individual objects and archives.
|
|
next if (/:$/);
|
|
|
|
# Ignore table header lines.
|
|
next if (/^Symbol Table Section:/);
|
|
next if (/index.*value.*size/);
|
|
|
|
# Start of archive symbol table: start skipping.
|
|
if (/^Symbol Table: \(archive/) {
|
|
$skip_arsym = 1;
|
|
next;
|
|
}
|
|
|
|
# Split table.
|
|
(undef, undef, undef, undef, $bind, $oth, undef, $shndx, $name) = split;
|
|
|
|
# Error out for unknown input.
|
|
die "unknown input line:\n$_" unless defined($bind);
|
|
|
|
# Ignore local symbols.
|
|
next if ($bind eq "LOCL");
|
|
# Ignore hidden symbols.
|
|
next if ($oth eq "H");
|
|
# Ignore undefined symbols.
|
|
next if ($shndx eq "UNDEF");
|
|
# Error out for unhandled cases.
|
|
if ($bind !~ /^(GLOB|WEAK)/ or $oth ne "D") {
|
|
die "unhandled symbol:\n$_";
|
|
}
|
|
|
|
# Remember symbol.
|
|
$sym_hash{$name}++;
|
|
}
|
|
close ELFDUMP or die "$elfdump error";
|
|
} else {
|
|
open READELF, 'readelf -s -W '.(join ' ',@OBJECTS).'|' or die $!;
|
|
# Process each symbol.
|
|
while (<READELF>) {
|
|
chomp;
|
|
|
|
# Ignore empty lines.
|
|
next if (/^$/);
|
|
|
|
# Ignore object name header.
|
|
next if (/^File: .*$/);
|
|
|
|
# Ignore table header lines.
|
|
next if (/^Symbol table.*contains.*:/);
|
|
next if (/Num:.*Value.*Size/);
|
|
|
|
# Split table.
|
|
(undef, undef, undef, undef, $bind, $vis, $ndx, $name) = split;
|
|
|
|
# Error out for unknown input.
|
|
die "unknown input line:\n$_" unless defined($bind);
|
|
|
|
# Ignore local symbols.
|
|
next if ($bind eq "LOCAL");
|
|
# Ignore hidden symbols.
|
|
next if ($vis eq "HIDDEN");
|
|
# Ignore undefined symbols.
|
|
next if ($ndx eq "UND");
|
|
# Error out for unhandled cases.
|
|
if ($bind !~ /^(GLOBAL|WEAK)/ or $vis ne "DEFAULT") {
|
|
die "unhandled symbol:\n$_";
|
|
}
|
|
|
|
# Remember symbol.
|
|
$sym_hash{$name}++;
|
|
}
|
|
close READELF or die "readelf error";
|
|
}
|
|
|
|
##########
|
|
# The various types of glob patterns.
|
|
#
|
|
# A glob pattern that is to be applied to the demangled name: 'cxx'.
|
|
# A glob patterns that applies directly to the name in the .o files: 'glob'.
|
|
# This pattern is ignored; used for local variables (usually just '*'): 'ign'.
|
|
|
|
# The type of the current pattern.
|
|
my $glob = 'glob';
|
|
|
|
# We're currently inside `extern "C++"', which Sun ld doesn't understand.
|
|
my $in_extern = 0;
|
|
|
|
# The c++filt command to use. This *must* be GNU c++filt; the Sun Studio
|
|
# c++filt doesn't handle the GNU mangling style.
|
|
my $cxxfilt = $ENV{'CXXFILT'} || "c++filt";
|
|
|
|
# The current version name.
|
|
my $current_version = "";
|
|
|
|
# Was there any attempt to match a symbol to this version?
|
|
my $matches_attempted;
|
|
|
|
# The number of versions which matched this symbol.
|
|
my $matched_symbols;
|
|
|
|
open F,$symvers or die $!;
|
|
|
|
# Print information about generating this file
|
|
print "# This file was generated by make_sunver.pl. DO NOT EDIT!\n";
|
|
print "# It was generated by:\n";
|
|
printf "# %s %s %s\n", $0, $symvers, (join ' ',@ARGV);
|
|
printf "# Omitted archives with corresponding shared libraries: %s\n",
|
|
(join ' ', @SHAREDOBJS) if $#SHAREDOBJS >= 0;
|
|
print "#\n\n";
|
|
|
|
while (<F>) {
|
|
# Lines of the form '};'
|
|
if (/^([ \t]*)(\}[ \t]*;[ \t]*)$/) {
|
|
$glob = 'glob';
|
|
if ($in_extern) {
|
|
$in_extern--;
|
|
print "$1##$2\n";
|
|
} else {
|
|
print;
|
|
}
|
|
next;
|
|
}
|
|
|
|
# Lines of the form '} SOME_VERSION_NAME_1.0;'
|
|
if (/^[ \t]*\}[ \tA-Z0-9_.a-z]+;[ \t]*$/) {
|
|
$glob = 'glob';
|
|
# We tried to match symbols agains this version, but none matched.
|
|
# Emit dummy hidden symbol to avoid marking this version WEAK.
|
|
if ($matches_attempted && $matched_symbols == 0) {
|
|
print " hidden:\n";
|
|
print " .force_WEAK_off_$current_version = DATA S0x0 V0x0;\n";
|
|
}
|
|
print; next;
|
|
}
|
|
|
|
# Comment and blank lines
|
|
if (/^[ \t]*\#/) { print; next; }
|
|
if (/^[ \t]*$/) { print; next; }
|
|
|
|
# Lines of the form '{'
|
|
if (/^([ \t]*){$/) {
|
|
if ($in_extern) {
|
|
print "$1##{\n";
|
|
} else {
|
|
print;
|
|
}
|
|
next;
|
|
}
|
|
|
|
# Lines of the form 'SOME_VERSION_NAME_1.1 {'
|
|
if (/^([A-Z0-9_.]+)[ \t]+{$/) {
|
|
# Record version name.
|
|
$current_version = $1;
|
|
# Reset match attempts, #matched symbols for this version.
|
|
$matches_attempted = 0;
|
|
$matched_symbols = 0;
|
|
print;
|
|
next;
|
|
}
|
|
|
|
# Ignore 'global:'
|
|
if (/^[ \t]*global:$/) { print; next; }
|
|
|
|
# After 'local:', globs should be ignored, they won't be exported.
|
|
if (/^[ \t]*local:$/) {
|
|
$glob = 'ign';
|
|
print;
|
|
next;
|
|
}
|
|
|
|
# After 'extern "C++"', globs are C++ patterns
|
|
if (/^([ \t]*)(extern \"C\+\+\"[ \t]*)$/) {
|
|
$in_extern++;
|
|
$glob = 'cxx';
|
|
# Need to comment, Sun ld cannot handle this.
|
|
print "$1##$2\n"; next;
|
|
}
|
|
|
|
# Chomp newline now we're done with passing through the input file.
|
|
chomp;
|
|
|
|
# Catch globs. Note that '{}' is not allowed in globs by this script,
|
|
# so only '*' and '[]' are available.
|
|
if (/^([ \t]*)([^ \t;{}#]+);?[ \t]*$/) {
|
|
my $ws = $1;
|
|
my $ptn = $2;
|
|
# Turn the glob into a regex by replacing '*' with '.*', '?' with '.'.
|
|
# Keep $ptn so we can still print the original form.
|
|
($pattern = $ptn) =~ s/\*/\.\*/g;
|
|
$pattern =~ s/\?/\./g;
|
|
|
|
if ($glob eq 'ign') {
|
|
# We're in a local: * section; just continue.
|
|
print "$_\n";
|
|
next;
|
|
}
|
|
|
|
# Print the glob commented for human readers.
|
|
print "$ws##$ptn ($glob)\n";
|
|
# We tried to match a symbol to this version.
|
|
$matches_attempted++;
|
|
|
|
if ($glob eq 'glob') {
|
|
my %ptn_syms = ();
|
|
|
|
# Match ptn against symbols in %sym_hash.
|
|
foreach my $sym (keys %sym_hash) {
|
|
# Maybe it matches one of the patterns based on the symbol in
|
|
# the .o file.
|
|
$ptn_syms{$sym}++ if ($sym =~ /^$pattern$/);
|
|
}
|
|
|
|
foreach my $sym (sort keys(%ptn_syms)) {
|
|
$matched_symbols++;
|
|
print "$ws$sym;\n";
|
|
}
|
|
} elsif ($glob eq 'cxx') {
|
|
my %dem_syms = ();
|
|
|
|
# Verify that we're actually using GNU c++filt. Other versions
|
|
# most likely cannot handle GNU style symbol mangling.
|
|
my $cxxout = `$cxxfilt --version 2>&1`;
|
|
$cxxout =~ m/GNU/ or die "$0 requires GNU c++filt to function";
|
|
|
|
# Talk to c++filt through a pair of file descriptors.
|
|
# Need to start a fresh instance per pattern, otherwise the
|
|
# process grows to 500+ MB.
|
|
my $pid = open2(*FILTIN, *FILTOUT, $cxxfilt) or die $!;
|
|
|
|
# Match ptn against symbols in %sym_hash.
|
|
foreach my $sym (keys %sym_hash) {
|
|
# No? Well, maybe its demangled form matches one of those
|
|
# patterns.
|
|
printf FILTOUT "%s\n",$sym;
|
|
my $dem = <FILTIN>;
|
|
chomp $dem;
|
|
$dem_syms{$sym}++ if ($dem =~ /^$pattern$/);
|
|
}
|
|
|
|
close FILTOUT or die "c++filt error";
|
|
close FILTIN or die "c++filt error";
|
|
# Need to wait for the c++filt process to avoid lots of zombies.
|
|
waitpid $pid, 0;
|
|
|
|
foreach my $sym (sort keys(%dem_syms)) {
|
|
$matched_symbols++;
|
|
print "$ws$sym;\n";
|
|
}
|
|
} else {
|
|
# No? Well, then ignore it.
|
|
}
|
|
next;
|
|
}
|
|
# Important sanity check. This script can't handle lots of formats
|
|
# that GNU ld can, so be sure to error out if one is seen!
|
|
die "strange line `$_'";
|
|
}
|
|
close F;
|