|
|
|
|
@ -1,597 +0,0 @@
|
|
|
|
|
#! /usr/bin/python
|
|
|
|
|
|
|
|
|
|
# mklibs.py: An automated way to create a minimal /lib/ directory.
|
|
|
|
|
#
|
|
|
|
|
# Copyright 2001 by Falk Hueffner <falk@debian.org>
|
|
|
|
|
# & Goswin Brederlow <goswin.brederlow@student.uni-tuebingen.de>
|
|
|
|
|
#
|
|
|
|
|
# mklibs.sh by Marcus Brinkmann <Marcus.Brinkmann@ruhr-uni-bochum.de>
|
|
|
|
|
# used as template
|
|
|
|
|
#
|
|
|
|
|
# This program 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 2 of the License, or
|
|
|
|
|
# (at your option) any later version.
|
|
|
|
|
#
|
|
|
|
|
# This program 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 program; if not, write to the Free Software
|
|
|
|
|
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
|
|
|
|
|
|
# HOW IT WORKS
|
|
|
|
|
#
|
|
|
|
|
# - Gather all unresolved symbols and libraries needed by the programs
|
|
|
|
|
# and reduced libraries
|
|
|
|
|
# - Gather all symbols provided by the already reduced libraries
|
|
|
|
|
# (none on the first pass)
|
|
|
|
|
# - If all symbols are provided we are done
|
|
|
|
|
# - go through all libraries and remember what symbols they provide
|
|
|
|
|
# - go through all unresolved/needed symbols and mark them as used
|
|
|
|
|
# - for each library:
|
|
|
|
|
# - find pic file (if not present copy and strip the so)
|
|
|
|
|
# - compile in only used symbols
|
|
|
|
|
# - strip
|
|
|
|
|
# - back to the top
|
|
|
|
|
|
|
|
|
|
# TODO
|
|
|
|
|
# * complete argument parsing as given as comment in main
|
|
|
|
|
|
|
|
|
|
import commands
|
|
|
|
|
import string
|
|
|
|
|
import re
|
|
|
|
|
import sys
|
|
|
|
|
import os
|
|
|
|
|
import glob
|
|
|
|
|
import getopt
|
|
|
|
|
from stat import *
|
|
|
|
|
|
|
|
|
|
DEBUG_NORMAL = 1
|
|
|
|
|
DEBUG_VERBOSE = 2
|
|
|
|
|
DEBUG_SPAM = 3
|
|
|
|
|
|
|
|
|
|
debuglevel = DEBUG_NORMAL
|
|
|
|
|
|
|
|
|
|
def debug(level, *msg):
|
|
|
|
|
if debuglevel >= level:
|
|
|
|
|
print string.join(msg)
|
|
|
|
|
|
|
|
|
|
# A simple set class. It should be replaced with the standard sets.Set
|
|
|
|
|
# type as soon as Python 2.3 is out.
|
|
|
|
|
class Set:
|
|
|
|
|
def __init__(self):
|
|
|
|
|
self.__dict = {}
|
|
|
|
|
|
|
|
|
|
def add(self, obj):
|
|
|
|
|
self.__dict[obj] = 1
|
|
|
|
|
|
|
|
|
|
def contains(self, obj):
|
|
|
|
|
return self.__dict.has_key(obj)
|
|
|
|
|
|
|
|
|
|
def merge(self, s):
|
|
|
|
|
for e in s.elems():
|
|
|
|
|
self.add(e)
|
|
|
|
|
|
|
|
|
|
def elems(self):
|
|
|
|
|
return self.__dict.keys()
|
|
|
|
|
|
|
|
|
|
def size(self):
|
|
|
|
|
return len(self.__dict)
|
|
|
|
|
|
|
|
|
|
def __eq__(self, other):
|
|
|
|
|
return self.__dict == other.__dict
|
|
|
|
|
|
|
|
|
|
def __str__(self):
|
|
|
|
|
return `self.__dict.keys()`
|
|
|
|
|
|
|
|
|
|
def __repr__(self):
|
|
|
|
|
return `self.__dict.keys()`
|
|
|
|
|
|
|
|
|
|
# return a list of lines of output of the command
|
|
|
|
|
def command(command, *args):
|
|
|
|
|
debug(DEBUG_SPAM, "calling", command, string.join(args))
|
|
|
|
|
(status, output) = commands.getstatusoutput(command + ' ' + string.join(args))
|
|
|
|
|
if os.WEXITSTATUS(status) != 0:
|
|
|
|
|
print "Command failed with status", os.WEXITSTATUS(status), ":", \
|
|
|
|
|
command, string.join(args)
|
|
|
|
|
print "With output:", output
|
|
|
|
|
sys.exit(1)
|
|
|
|
|
return string.split(output, '\n')
|
|
|
|
|
|
|
|
|
|
# Filter a list according to a regexp containing a () group. Return
|
|
|
|
|
# a Set.
|
|
|
|
|
def regexpfilter(list, regexp, groupnr = 1):
|
|
|
|
|
pattern = re.compile(regexp)
|
|
|
|
|
result = Set()
|
|
|
|
|
for x in list:
|
|
|
|
|
match = pattern.match(x)
|
|
|
|
|
if match:
|
|
|
|
|
result.add(match.group(groupnr))
|
|
|
|
|
|
|
|
|
|
return result
|
|
|
|
|
|
|
|
|
|
# Return a Set of rpath strings for the passed object
|
|
|
|
|
def rpath(obj):
|
|
|
|
|
if not os.access(obj, os.F_OK):
|
|
|
|
|
raise "Cannot find lib: " + obj
|
|
|
|
|
output = command(target + "objdump", "--private-headers", obj)
|
|
|
|
|
return map(lambda x: root + "/" + x, regexpfilter(output, ".*RPATH\s*(\S+)$").elems())
|
|
|
|
|
|
|
|
|
|
# Return a Set of libraries the passed objects depend on.
|
|
|
|
|
def library_depends(obj):
|
|
|
|
|
if not os.access(obj, os.F_OK):
|
|
|
|
|
raise "Cannot find lib: " + obj
|
|
|
|
|
output = command(target + "objdump", "--private-headers", obj)
|
|
|
|
|
return regexpfilter(output, ".*NEEDED\s*(\S+)$")
|
|
|
|
|
|
|
|
|
|
# Return a list of libraries the passed objects depend on. The
|
|
|
|
|
# libraries are in "-lfoo" format suitable for passing to gcc.
|
|
|
|
|
def library_depends_gcc_libnames(obj):
|
|
|
|
|
if not os.access(obj, os.F_OK):
|
|
|
|
|
raise "Cannot find lib: " + obj
|
|
|
|
|
output = command(target + "objdump", "--private-headers", obj)
|
|
|
|
|
output = regexpfilter(output, ".*NEEDED\s*lib(\S+)\.so.*$")
|
|
|
|
|
if not output.elems():
|
|
|
|
|
return ""
|
|
|
|
|
else:
|
|
|
|
|
return "-l" + string.join(output.elems(), " -l")
|
|
|
|
|
|
|
|
|
|
# Scan readelf output. Example:
|
|
|
|
|
# Num: Value Size Type Bind Vis Ndx Name
|
|
|
|
|
# 1: 000000012002ab48 168 FUNC GLOBAL DEFAULT UND strchr@GLIBC_2.0 (2)
|
|
|
|
|
symline_regexp = \
|
|
|
|
|
re.compile("\s*\d+: .+\s+\d+\s+\w+\s+(\w+)+\s+\w+\s+(\w+)\s+([^\s@]+)")
|
|
|
|
|
|
|
|
|
|
# Return undefined symbols in an object as a Set of tuples (name, weakness)
|
|
|
|
|
def undefined_symbols(obj):
|
|
|
|
|
if not os.access(obj, os.F_OK):
|
|
|
|
|
raise "Cannot find lib" + obj
|
|
|
|
|
|
|
|
|
|
result = Set()
|
|
|
|
|
output = command(target + "readelf", "-s", "-W", obj)
|
|
|
|
|
for line in output:
|
|
|
|
|
match = symline_regexp.match(line)
|
|
|
|
|
if match:
|
|
|
|
|
bind, ndx, name = match.groups()
|
|
|
|
|
if ndx == "UND":
|
|
|
|
|
result.add((name, bind == "WEAK"))
|
|
|
|
|
return result
|
|
|
|
|
|
|
|
|
|
# Return a Set of symbols provided by a library
|
|
|
|
|
def provided_symbols(obj):
|
|
|
|
|
if not os.access(obj, os.F_OK):
|
|
|
|
|
raise "Cannot find lib" + obj
|
|
|
|
|
|
|
|
|
|
result = Set()
|
|
|
|
|
debug(DEBUG_SPAM, "provided_symbols result = ", `result`)
|
|
|
|
|
output = command(target + "readelf", "-s", "-W", obj)
|
|
|
|
|
for line in output:
|
|
|
|
|
match = symline_regexp.match(line)
|
|
|
|
|
if match:
|
|
|
|
|
bind, ndx, name = match.groups()
|
|
|
|
|
if bind != "LOCAL" and not ndx in ("UND", "ABS"):
|
|
|
|
|
debug(DEBUG_SPAM, "provided_symbols adding ", `name`)
|
|
|
|
|
result.add(name)
|
|
|
|
|
return result
|
|
|
|
|
|
|
|
|
|
# Return real target of a symlink
|
|
|
|
|
def resolve_link(file):
|
|
|
|
|
debug(DEBUG_SPAM, "resolving", file)
|
|
|
|
|
while S_ISLNK(os.lstat(file)[ST_MODE]):
|
|
|
|
|
new_file = os.readlink(file)
|
|
|
|
|
if new_file[0] != "/":
|
|
|
|
|
file = os.path.join(os.path.dirname(file), new_file)
|
|
|
|
|
else:
|
|
|
|
|
file = new_file
|
|
|
|
|
debug(DEBUG_SPAM, "resolved to", file)
|
|
|
|
|
return file
|
|
|
|
|
|
|
|
|
|
# Find complete path of a library, by searching in lib_path
|
|
|
|
|
def find_lib(lib):
|
|
|
|
|
for path in lib_path:
|
|
|
|
|
if os.access(path + "/" + lib, os.F_OK):
|
|
|
|
|
return path + "/" + lib
|
|
|
|
|
|
|
|
|
|
return ""
|
|
|
|
|
|
|
|
|
|
# Find a PIC archive for the library
|
|
|
|
|
def find_pic(lib):
|
|
|
|
|
base_name = so_pattern.match(lib).group(1)
|
|
|
|
|
for path in lib_path:
|
|
|
|
|
for file in glob.glob(path + "/" + base_name + "_pic.a"):
|
|
|
|
|
if os.access(file, os.F_OK):
|
|
|
|
|
return resolve_link(file)
|
|
|
|
|
return ""
|
|
|
|
|
|
|
|
|
|
# Find a PIC .map file for the library
|
|
|
|
|
def find_pic_map(lib):
|
|
|
|
|
base_name = so_pattern.match(lib).group(1)
|
|
|
|
|
for path in lib_path:
|
|
|
|
|
for file in glob.glob(path + "/" + base_name + "_pic.map"):
|
|
|
|
|
if os.access(file, os.F_OK):
|
|
|
|
|
return resolve_link(file)
|
|
|
|
|
return ""
|
|
|
|
|
|
|
|
|
|
def extract_soname(so_file):
|
|
|
|
|
soname_data = regexpfilter(command(target + "readelf", "--all", "-W", so_file),
|
|
|
|
|
".*SONAME.*\[(.*)\].*")
|
|
|
|
|
if soname_data.elems():
|
|
|
|
|
return soname_data.elems()[0]
|
|
|
|
|
|
|
|
|
|
return ""
|
|
|
|
|
def usage(was_err):
|
|
|
|
|
if was_err:
|
|
|
|
|
outfd = sys.stderr
|
|
|
|
|
else:
|
|
|
|
|
outfd = sys.stdout
|
|
|
|
|
print >> outfd, "Usage: mklibs [OPTION]... -d DEST FILE ..."
|
|
|
|
|
print >> outfd, "Make a set of minimal libraries for FILE(s) in DEST."
|
|
|
|
|
print >> outfd, ""
|
|
|
|
|
print >> outfd, " -d, --dest-dir DIRECTORY create libraries in DIRECTORY"
|
|
|
|
|
print >> outfd, " -D, --no-default-lib omit default libpath (", string.join(default_lib_path, " : "), ")"
|
|
|
|
|
print >> outfd, " -L DIRECTORY[:DIRECTORY]... add DIRECTORY(s) to the library search path"
|
|
|
|
|
print >> outfd, " --ldlib LDLIB use LDLIB for the dynamic linker"
|
|
|
|
|
print >> outfd, " --libc-extras-dir DIRECTORY look for libc extra files in DIRECTORY"
|
|
|
|
|
# Ugh... Adding the trailing '-' breaks common practice.
|
|
|
|
|
#print >> outfd, " --target TARGET prepend TARGET- to the gcc and binutils calls"
|
|
|
|
|
print >> outfd, " --target TARGET prepend TARGET to the gcc and binutils calls"
|
|
|
|
|
print >> outfd, " --root ROOT search in ROOT for library rpaths"
|
|
|
|
|
print >> outfd, " -v, --verbose explain what is being done"
|
|
|
|
|
print >> outfd, " -h, --help display this help and exit"
|
|
|
|
|
sys.exit(was_err)
|
|
|
|
|
|
|
|
|
|
def version(vers):
|
|
|
|
|
print "mklibs: version ",vers
|
|
|
|
|
print ""
|
|
|
|
|
|
|
|
|
|
#################### main ####################
|
|
|
|
|
## Usage: ./mklibs.py [OPTION]... -d DEST FILE ...
|
|
|
|
|
## Make a set of minimal libraries for FILE ... in directory DEST.
|
|
|
|
|
##
|
|
|
|
|
## Options:
|
|
|
|
|
## -L DIRECTORY Add DIRECTORY to library search path.
|
|
|
|
|
## -D, --no-default-lib Do not use default lib directories of /lib:/usr/lib
|
|
|
|
|
## -n, --dry-run Don't actually run any commands; just print them.
|
|
|
|
|
## -v, --verbose Print additional progress information.
|
|
|
|
|
## -V, --version Print the version number and exit.
|
|
|
|
|
## -h, --help Print this help and exit.
|
|
|
|
|
## --ldlib Name of dynamic linker (overwrites environment variable ldlib)
|
|
|
|
|
## --libc-extras-dir Directory for libc extra files
|
|
|
|
|
## --target Use as prefix for gcc or binutils calls
|
|
|
|
|
##
|
|
|
|
|
## -d, --dest-dir DIRECTORY Create libraries in DIRECTORY.
|
|
|
|
|
##
|
|
|
|
|
## Required arguments for long options are also mandatory for the short options.
|
|
|
|
|
|
|
|
|
|
# Clean the environment
|
|
|
|
|
vers="0.12 with uClibc fixes"
|
|
|
|
|
os.environ['LC_ALL'] = "C"
|
|
|
|
|
|
|
|
|
|
# Argument parsing
|
|
|
|
|
opts = "L:DnvVhd:r:"
|
|
|
|
|
longopts = ["no-default-lib", "dry-run", "verbose", "version", "help",
|
|
|
|
|
"dest-dir=", "ldlib=", "libc-extras-dir=", "target=", "root="]
|
|
|
|
|
|
|
|
|
|
# some global variables
|
|
|
|
|
lib_rpath = []
|
|
|
|
|
lib_path = []
|
|
|
|
|
dest_path = "DEST"
|
|
|
|
|
ldlib = "LDLIB"
|
|
|
|
|
include_default_lib_path = "yes"
|
|
|
|
|
default_lib_path = ["/lib/", "/usr/lib/", "/usr/X11R6/lib/"]
|
|
|
|
|
libc_extras_dir = "/usr/lib/libc_pic"
|
|
|
|
|
target = ""
|
|
|
|
|
root = ""
|
|
|
|
|
so_pattern = re.compile("((lib|ld).*)\.so(\..+)*")
|
|
|
|
|
script_pattern = re.compile("^#!\s*/")
|
|
|
|
|
|
|
|
|
|
try:
|
|
|
|
|
optlist, proglist = getopt.getopt(sys.argv[1:], opts, longopts)
|
|
|
|
|
except getopt.GetoptError, msg:
|
|
|
|
|
print >> sys.stderr, msg
|
|
|
|
|
usage(1)
|
|
|
|
|
|
|
|
|
|
for opt, arg in optlist:
|
|
|
|
|
if opt in ("-v", "--verbose"):
|
|
|
|
|
if debuglevel < DEBUG_SPAM:
|
|
|
|
|
debuglevel = debuglevel + 1
|
|
|
|
|
elif opt == "-L":
|
|
|
|
|
lib_path.extend(string.split(arg, ":"))
|
|
|
|
|
elif opt in ("-d", "--dest-dir"):
|
|
|
|
|
dest_path = arg
|
|
|
|
|
elif opt in ("-D", "--no-default-lib"):
|
|
|
|
|
include_default_lib_path = "no"
|
|
|
|
|
elif opt == "--ldlib":
|
|
|
|
|
ldlib = arg
|
|
|
|
|
elif opt == "--libc-extras-dir":
|
|
|
|
|
libc_extras_dir = arg
|
|
|
|
|
elif opt == "--target":
|
|
|
|
|
#target = arg + "-"
|
|
|
|
|
target = arg
|
|
|
|
|
elif opt in ("-r", "--root"):
|
|
|
|
|
root = arg
|
|
|
|
|
elif opt in ("--help", "-h"):
|
|
|
|
|
usage(0)
|
|
|
|
|
sys.exit(0)
|
|
|
|
|
elif opt in ("--version", "-V"):
|
|
|
|
|
version(vers)
|
|
|
|
|
sys.exit(0)
|
|
|
|
|
else:
|
|
|
|
|
print "WARNING: unknown option: " + opt + "\targ: " + arg
|
|
|
|
|
|
|
|
|
|
if include_default_lib_path == "yes":
|
|
|
|
|
lib_path.extend(default_lib_path)
|
|
|
|
|
|
|
|
|
|
if ldlib == "LDLIB":
|
|
|
|
|
ldlib = os.getenv("ldlib")
|
|
|
|
|
|
|
|
|
|
objects = {} # map from inode to filename
|
|
|
|
|
for prog in proglist:
|
|
|
|
|
inode = os.stat(prog)[ST_INO]
|
|
|
|
|
if objects.has_key(inode):
|
|
|
|
|
debug(DEBUG_SPAM, prog, "is a hardlink to", objects[inode])
|
|
|
|
|
elif so_pattern.match(prog):
|
|
|
|
|
debug(DEBUG_SPAM, prog, "is a library")
|
|
|
|
|
elif script_pattern.match(open(prog).read(256)):
|
|
|
|
|
debug(DEBUG_SPAM, prog, "is a script")
|
|
|
|
|
else:
|
|
|
|
|
objects[inode] = prog
|
|
|
|
|
|
|
|
|
|
if not ldlib:
|
|
|
|
|
pattern = re.compile(".*Requesting program interpreter:.*/([^\]/]+).*")
|
|
|
|
|
for obj in objects.values():
|
|
|
|
|
output = command(target + "readelf", "--program-headers", obj)
|
|
|
|
|
for x in output:
|
|
|
|
|
match = pattern.match(x)
|
|
|
|
|
if match:
|
|
|
|
|
ldlib = match.group(1)
|
|
|
|
|
break
|
|
|
|
|
if ldlib:
|
|
|
|
|
break
|
|
|
|
|
|
|
|
|
|
if not ldlib:
|
|
|
|
|
sys.exit("E: Dynamic linker not found, aborting.")
|
|
|
|
|
|
|
|
|
|
debug(DEBUG_NORMAL, "I: Using", ldlib, "as dynamic linker.")
|
|
|
|
|
|
|
|
|
|
pattern = re.compile(".*ld-uClibc.*");
|
|
|
|
|
if pattern.match(ldlib):
|
|
|
|
|
uclibc = 1
|
|
|
|
|
else:
|
|
|
|
|
uclibc = 0
|
|
|
|
|
|
|
|
|
|
# Check for rpaths
|
|
|
|
|
for obj in objects.values():
|
|
|
|
|
rpath_val = rpath(obj)
|
|
|
|
|
if rpath_val:
|
|
|
|
|
if root:
|
|
|
|
|
if debuglevel >= DEBUG_VERBOSE:
|
|
|
|
|
print "Adding rpath " + string.join(rpath_val, ":") + " for " + obj
|
|
|
|
|
lib_rpath.extend(rpath_val)
|
|
|
|
|
else:
|
|
|
|
|
print "warning: " + obj + " may need rpath, but --root not specified"
|
|
|
|
|
|
|
|
|
|
lib_path.extend(lib_rpath)
|
|
|
|
|
|
|
|
|
|
passnr = 1
|
|
|
|
|
previous_pass_unresolved = Set()
|
|
|
|
|
while 1:
|
|
|
|
|
debug(DEBUG_NORMAL, "I: library reduction pass", `passnr`)
|
|
|
|
|
if debuglevel >= DEBUG_VERBOSE:
|
|
|
|
|
print "Objects:",
|
|
|
|
|
for obj in objects.values():
|
|
|
|
|
print obj[string.rfind(obj, '/') + 1:],
|
|
|
|
|
print
|
|
|
|
|
|
|
|
|
|
passnr = passnr + 1
|
|
|
|
|
# Gather all already reduced libraries and treat them as objects as well
|
|
|
|
|
small_libs = []
|
|
|
|
|
for lib in regexpfilter(os.listdir(dest_path), "(.*-so-stripped)$").elems():
|
|
|
|
|
obj = dest_path + "/" + lib
|
|
|
|
|
small_libs.append(obj)
|
|
|
|
|
inode = os.stat(obj)[ST_INO]
|
|
|
|
|
if objects.has_key(inode):
|
|
|
|
|
debug(DEBUG_SPAM, obj, "is hardlink to", objects[inode])
|
|
|
|
|
else:
|
|
|
|
|
objects[inode] = obj
|
|
|
|
|
|
|
|
|
|
# DEBUG
|
|
|
|
|
for obj in objects.values():
|
|
|
|
|
small_libs.append(obj)
|
|
|
|
|
debug(DEBUG_VERBOSE, "Object:", obj)
|
|
|
|
|
|
|
|
|
|
# calculate what symbols and libraries are needed
|
|
|
|
|
needed_symbols = Set() # Set of (name, weakness-flag)
|
|
|
|
|
libraries = Set()
|
|
|
|
|
for obj in objects.values():
|
|
|
|
|
needed_symbols.merge(undefined_symbols(obj))
|
|
|
|
|
libraries.merge(library_depends(obj))
|
|
|
|
|
|
|
|
|
|
# FIXME: on i386 this is undefined but not marked UND
|
|
|
|
|
# I don't know how to detect those symbols but this seems
|
|
|
|
|
# to be the only one and including it on alpha as well
|
|
|
|
|
# doesn't hurt. I guess all archs can live with this.
|
|
|
|
|
needed_symbols.add(("sys_siglist", 1))
|
|
|
|
|
|
|
|
|
|
# calculate what symbols are present in small_libs
|
|
|
|
|
present_symbols = Set()
|
|
|
|
|
for lib in small_libs:
|
|
|
|
|
present_symbols.merge(provided_symbols(lib))
|
|
|
|
|
|
|
|
|
|
# are we finished?
|
|
|
|
|
using_ctor_dtor = 0
|
|
|
|
|
num_unresolved = 0
|
|
|
|
|
present_symbols_elems = present_symbols.elems()
|
|
|
|
|
unresolved = Set()
|
|
|
|
|
for (symbol, is_weak) in needed_symbols.elems():
|
|
|
|
|
if not symbol in present_symbols_elems:
|
|
|
|
|
debug(DEBUG_SPAM, "Still need:", symbol, `is_weak`)
|
|
|
|
|
unresolved.add((symbol, is_weak))
|
|
|
|
|
num_unresolved = num_unresolved + 1
|
|
|
|
|
|
|
|
|
|
debug (DEBUG_NORMAL, `needed_symbols.size()`, "symbols,",
|
|
|
|
|
`num_unresolved`, "unresolved")
|
|
|
|
|
|
|
|
|
|
if num_unresolved == 0:
|
|
|
|
|
break
|
|
|
|
|
|
|
|
|
|
if unresolved == previous_pass_unresolved:
|
|
|
|
|
# No progress in last pass. Verify all remaining symbols are weak.
|
|
|
|
|
for (symbol, is_weak) in unresolved.elems():
|
|
|
|
|
if not is_weak:
|
|
|
|
|
raise "Unresolvable symbol " + symbol
|
|
|
|
|
break
|
|
|
|
|
|
|
|
|
|
previous_pass_unresolved = unresolved
|
|
|
|
|
|
|
|
|
|
library_symbols = {}
|
|
|
|
|
library_symbols_used = {}
|
|
|
|
|
symbol_provider = {}
|
|
|
|
|
|
|
|
|
|
# Calculate all symbols each library provides
|
|
|
|
|
for library in libraries.elems():
|
|
|
|
|
path = find_lib(library)
|
|
|
|
|
if not path:
|
|
|
|
|
sys.exit("Library not found: " + library + " in path: "
|
|
|
|
|
+ string.join(lib_path, " : "))
|
|
|
|
|
symbols = provided_symbols(path)
|
|
|
|
|
library_symbols[library] = Set()
|
|
|
|
|
library_symbols_used[library] = Set()
|
|
|
|
|
for symbol in symbols.elems():
|
|
|
|
|
if symbol_provider.has_key(symbol):
|
|
|
|
|
# in doubt, prefer symbols from libc
|
|
|
|
|
if re.match("^libc[\.-]", library):
|
|
|
|
|
library_symbols[library].add(symbol)
|
|
|
|
|
symbol_provider[symbol] = library
|
|
|
|
|
else:
|
|
|
|
|
debug(DEBUG_SPAM, "duplicate symbol", symbol, "in",
|
|
|
|
|
symbol_provider[symbol], "and", library)
|
|
|
|
|
else:
|
|
|
|
|
library_symbols[library].add(symbol)
|
|
|
|
|
symbol_provider[symbol] = library
|
|
|
|
|
|
|
|
|
|
# Fixup support for constructors and destructors
|
|
|
|
|
if symbol_provider.has_key("_init"):
|
|
|
|
|
debug(DEBUG_VERBOSE, library, ": Library has a constructor!");
|
|
|
|
|
using_ctor_dtor = 1
|
|
|
|
|
library_symbols[library].add("_init")
|
|
|
|
|
symbol_provider["_init"] = library
|
|
|
|
|
library_symbols_used[library].add("_init")
|
|
|
|
|
|
|
|
|
|
if symbol_provider.has_key("_fini"):
|
|
|
|
|
debug(DEBUG_VERBOSE, library, ": Library has a destructor!");
|
|
|
|
|
using_ctor_dtor = 1
|
|
|
|
|
library_symbols[library].add("_fini")
|
|
|
|
|
symbol_provider["_fini"] = library
|
|
|
|
|
library_symbols_used[library].add("_fini")
|
|
|
|
|
|
|
|
|
|
# which symbols are actually used from each lib
|
|
|
|
|
for (symbol, is_weak) in needed_symbols.elems():
|
|
|
|
|
if not symbol_provider.has_key(symbol):
|
|
|
|
|
if not is_weak:
|
|
|
|
|
if not uclibc or (symbol != "main"):
|
|
|
|
|
raise "No library provides non-weak " + symbol
|
|
|
|
|
else:
|
|
|
|
|
lib = symbol_provider[symbol]
|
|
|
|
|
library_symbols_used[lib].add(symbol)
|
|
|
|
|
|
|
|
|
|
# reduce libraries
|
|
|
|
|
for library in libraries.elems():
|
|
|
|
|
debug(DEBUG_VERBOSE, "reducing", library)
|
|
|
|
|
debug(DEBUG_SPAM, "using: " + string.join(library_symbols_used[library].elems()))
|
|
|
|
|
so_file = find_lib(library)
|
|
|
|
|
if root and (re.compile("^" + root).search(so_file)):
|
|
|
|
|
debug(DEBUG_VERBOSE, "no action required for " + so_file)
|
|
|
|
|
continue
|
|
|
|
|
so_file_name = os.path.basename(so_file)
|
|
|
|
|
if not so_file:
|
|
|
|
|
sys.exit("File not found:" + library)
|
|
|
|
|
pic_file = find_pic(library)
|
|
|
|
|
if not pic_file:
|
|
|
|
|
# No pic file, so we have to use the .so file, no reduction
|
|
|
|
|
debug(DEBUG_VERBOSE, "No pic file found for", so_file, "; copying")
|
|
|
|
|
command(target + "objcopy", "--strip-unneeded -R .note -R .comment",
|
|
|
|
|
so_file, dest_path + "/" + so_file_name + "-so-stripped")
|
|
|
|
|
else:
|
|
|
|
|
# we have a pic file, recompile
|
|
|
|
|
debug(DEBUG_SPAM, "extracting from:", pic_file, "so_file:", so_file)
|
|
|
|
|
soname = extract_soname(so_file)
|
|
|
|
|
if soname == "":
|
|
|
|
|
debug(DEBUG_VERBOSE, so_file, " has no soname, copying")
|
|
|
|
|
continue
|
|
|
|
|
debug(DEBUG_SPAM, "soname:", soname)
|
|
|
|
|
base_name = so_pattern.match(library).group(1)
|
|
|
|
|
# libc needs its soinit.o and sofini.o as well as the pic
|
|
|
|
|
if (base_name == "libc") and not uclibc:
|
|
|
|
|
# force dso_handle.os to be included, otherwise reduced libc
|
|
|
|
|
# may segfault in ptmalloc_init due to undefined weak reference
|
|
|
|
|
extra_flags = find_lib(ldlib) + " -u __dso_handle"
|
|
|
|
|
extra_pre_obj = libc_extras_dir + "/soinit.o"
|
|
|
|
|
extra_post_obj = libc_extras_dir + "/sofini.o"
|
|
|
|
|
else:
|
|
|
|
|
extra_flags = ""
|
|
|
|
|
extra_pre_obj = ""
|
|
|
|
|
extra_post_obj = ""
|
|
|
|
|
map_file = find_pic_map(library)
|
|
|
|
|
if map_file:
|
|
|
|
|
extra_flags = extra_flags + " -Wl,--version-script=" + map_file
|
|
|
|
|
if library_symbols_used[library].elems():
|
|
|
|
|
joined_symbols = "-u" + string.join(library_symbols_used[library].elems(), " -u")
|
|
|
|
|
else:
|
|
|
|
|
joined_symbols = ""
|
|
|
|
|
if using_ctor_dtor == 1:
|
|
|
|
|
extra_flags = extra_flags + " -shared"
|
|
|
|
|
# compile in only used symbols
|
|
|
|
|
command(target + "gcc",
|
|
|
|
|
"-nostdlib -nostartfiles -shared -Wl,-soname=" + soname,\
|
|
|
|
|
joined_symbols, \
|
|
|
|
|
"-o", dest_path + "/" + so_file_name + "-so", \
|
|
|
|
|
extra_pre_obj, \
|
|
|
|
|
pic_file, \
|
|
|
|
|
extra_post_obj, \
|
|
|
|
|
extra_flags, \
|
|
|
|
|
"-lgcc -L", dest_path, \
|
|
|
|
|
"-L" + string.join(lib_path, " -L"), \
|
|
|
|
|
library_depends_gcc_libnames(so_file))
|
|
|
|
|
# strip result
|
|
|
|
|
command(target + "objcopy", "--strip-unneeded -R .note -R .comment",
|
|
|
|
|
dest_path + "/" + so_file_name + "-so",
|
|
|
|
|
dest_path + "/" + so_file_name + "-so-stripped")
|
|
|
|
|
## DEBUG
|
|
|
|
|
debug(DEBUG_VERBOSE, so_file, "\t", `os.stat(so_file)[ST_SIZE]`)
|
|
|
|
|
debug(DEBUG_VERBOSE, dest_path + "/" + so_file_name + "-so", "\t",
|
|
|
|
|
`os.stat(dest_path + "/" + so_file_name + "-so")[ST_SIZE]`)
|
|
|
|
|
debug(DEBUG_VERBOSE, dest_path + "/" + so_file_name + "-so-stripped",
|
|
|
|
|
"\t", `os.stat(dest_path + "/" + so_file_name + "-so-stripped")[ST_SIZE]`)
|
|
|
|
|
|
|
|
|
|
# Finalising libs and cleaning up
|
|
|
|
|
for lib in regexpfilter(os.listdir(dest_path), "(.*)-so-stripped$").elems():
|
|
|
|
|
os.rename(dest_path + "/" + lib + "-so-stripped", dest_path + "/" + lib)
|
|
|
|
|
for lib in regexpfilter(os.listdir(dest_path), "(.*-so)$").elems():
|
|
|
|
|
os.remove(dest_path + "/" + lib)
|
|
|
|
|
|
|
|
|
|
# Canonicalize library names.
|
|
|
|
|
for lib in regexpfilter(os.listdir(dest_path), "(.*so[.\d]*)$").elems():
|
|
|
|
|
this_lib_path = dest_path + "/" + lib
|
|
|
|
|
if os.path.islink(this_lib_path):
|
|
|
|
|
debug(DEBUG_VERBOSE, "Unlinking %s." % lib)
|
|
|
|
|
os.remove(this_lib_path)
|
|
|
|
|
continue
|
|
|
|
|
soname = extract_soname(this_lib_path)
|
|
|
|
|
if soname:
|
|
|
|
|
debug(DEBUG_VERBOSE, "Moving %s to %s." % (lib, soname))
|
|
|
|
|
os.rename(dest_path + "/" + lib, dest_path + "/" + soname)
|
|
|
|
|
|
|
|
|
|
# Make sure the dynamic linker is present and is executable
|
|
|
|
|
ld_file = find_lib(ldlib)
|
|
|
|
|
ld_file_name = os.path.basename(ld_file)
|
|
|
|
|
|
|
|
|
|
if not os.access(dest_path + "/" + ld_file_name, os.F_OK):
|
|
|
|
|
debug(DEBUG_NORMAL, "I: stripping and copying dynamic linker.")
|
|
|
|
|
command(target + "objcopy", "--strip-unneeded -R .note -R .comment",
|
|
|
|
|
ld_file, dest_path + "/" + ld_file_name)
|
|
|
|
|
|
|
|
|
|
os.chmod(dest_path + "/" + ld_file_name, 0755)
|
Thomas Petazzoni
Peter Korsgaard