From 04fc98235b338558eaad347b698d63414270589b Mon Sep 17 00:00:00 2001 From: Amand Tihon Date: Sat, 8 Aug 2009 17:26:17 +0200 Subject: [PATCH] License change, small enhancements, version bump. --- Bold/BinArray.py | 5 +- Bold/__init__.py | 4 +- Bold/constants.py | 26 +- Bold/elf.py | 6 +- Bold/errors.py | 6 +- Bold/linker.py | 39 +-- bold.py => bold | 73 ++-- doc/GPL-3 | 676 ++++++++++++++++++++++++++++++++++++ doc/copyright | 96 +++++ runtime/bold_ibh-x86_64.asm | 6 +- 10 files changed, 852 insertions(+), 85 deletions(-) rename bold.py => bold (71%) create mode 100644 doc/GPL-3 create mode 100644 doc/copyright diff --git a/Bold/BinArray.py b/Bold/BinArray.py index 84d5725..f8e5759 100644 --- a/Bold/BinArray.py +++ b/Bold/BinArray.py @@ -1,5 +1,4 @@ # -*- coding: utf-8 -*- - # kate: space-indent on; indent-width 2; mixedindent off; indent-mode python; # Copyright (C) 2009 Amand 'alrj' Tihon @@ -7,8 +6,8 @@ # This file is part of bold, the Byte Optimized Linker. # # You can redistribute this file and/or modify it under the terms of the -# GNU Lesser General Public License as published by the Free Software -# Foundation, version 2.1. +# GNU General Public License as published by the Free Software Foundation, +# either version 3 of the License or (at your option) any later version. from array import array import struct diff --git a/Bold/__init__.py b/Bold/__init__.py index f090c5a..632e25e 100644 --- a/Bold/__init__.py +++ b/Bold/__init__.py @@ -7,8 +7,8 @@ # This file is part of bold, the Byte Optimized Linker. # # You can redistribute this file and/or modify it under the terms of the -# GNU Lesser General Public License as published by the Free Software -# Foundation, version 2.1. +# GNU General Public License as published by the Free Software Foundation, +# either version 3 of the License or (at your option) any later version. """ Empty file in place. diff --git a/Bold/constants.py b/Bold/constants.py index 72d0100..797613d 100644 --- a/Bold/constants.py +++ b/Bold/constants.py @@ -1,5 +1,4 @@ # -*- coding: utf-8 -*- - # kate: space-indent on; indent-width 2; mixedindent off; indent-mode python; # Copyright (C) 2009 Amand 'alrj' Tihon @@ -8,8 +7,8 @@ # Heavily inspired by elf.h from the GNU C Library. # # You can redistribute this file and/or modify it under the terms of the -# GNU Lesser General Public License as published by the Free Software -# Foundation, version 2.1. +# GNU General Public License as published by the Free Software Foundation, +# either version 3 of the License or (at your option) any later version. """This file defines standard ELF constants.""" @@ -218,24 +217,3 @@ R_X86_64_TLSLD = Amd64Relocation(20, "TLSLD") R_X86_64_DTPOFF32 = Amd64Relocation(21, "DTPOFF32") R_X86_64_GOTTPOFF = Amd64Relocation(22, "GOTTPOFF") R_X86_64_TPOFF32 = Amd64Relocation(23, "TPOFF32") - - - - - - - - - - - - - - - - - - - - - diff --git a/Bold/elf.py b/Bold/elf.py index b439451..3cf8319 100644 --- a/Bold/elf.py +++ b/Bold/elf.py @@ -1,5 +1,4 @@ # -*- coding: utf-8 -*- - # kate: space-indent on; indent-width 2; mixedindent off; indent-mode python; # Copyright (C) 2009 Amand 'alrj' Tihon @@ -7,8 +6,8 @@ # This file is part of bold, the Byte Optimized Linker. # # You can redistribute this file and/or modify it under the terms of the -# GNU Lesser General Public License as published by the Free Software -# Foundation, version 2.1. +# GNU General Public License as published by the Free Software Foundation, +# either version 3 of the License or (at your option) any later version. from BinArray import BinArray @@ -20,6 +19,7 @@ import struct def nested_property(c): return property(**c()) + #-------------------------------------------------------------------------- # Elf #-------------------------------------------------------------------------- diff --git a/Bold/errors.py b/Bold/errors.py index 98db3e8..28d2c13 100644 --- a/Bold/errors.py +++ b/Bold/errors.py @@ -7,8 +7,8 @@ # This file is part of bold, the Byte Optimized Linker. # # You can redistribute this file and/or modify it under the terms of the -# GNU Lesser General Public License as published by the Free Software -# Foundation, version 2.1. +# GNU General Public License as published by the Free Software Foundation, +# either version 3 of the License or (at your option) any later version. """Define all the exceptions.""" @@ -42,7 +42,7 @@ class UndefinedSymbol(Exception): return "Undefined reference to '%s'" % self.symbol class RedefinedSymbol(Exception): - """Raised if a symbol is referenced but not declared.""" + """Raised if a symbol is defined more than once.""" def __init__(self, symbol_name): self.symbol = symbol_name def __str__(self): diff --git a/Bold/linker.py b/Bold/linker.py index 8549066..505e2f1 100644 --- a/Bold/linker.py +++ b/Bold/linker.py @@ -1,4 +1,3 @@ -#! /usr/bin/python # -*- coding: utf-8 -*- # kate: space-indent on; indent-width 2; mixedindent off; indent-mode python; @@ -7,8 +6,8 @@ # This file is part of bold, the Byte Optimized Linker. # # You can redistribute this file and/or modify it under the terms of the -# GNU Lesser General Public License as published by the Free Software -# Foundation, version 2.1. +# GNU General Public License as published by the Free Software Foundation, +# either version 3 of the License or (at your option) any later version. """ Main entry point for the bold linker. @@ -22,22 +21,21 @@ from errors import * from ctypes.util import find_library import struct + def hash_name(name): - """Caculate the hash of the function name.""" + """Caculate the hash of the function name. + @param name: the string to hash + @return: 32 bits hash value. + """ h = 0 for c in name: h = ((h * 0x21) ^ ord(c)) & 0xffffffff return h + class BoldLinker(object): """A Linker object takes one or more objects files, optional shared libs, and arranges all this in an executable. - - Important note: the external functions from the libraries are NOT resolved. - This import is left to the user, as it can be done more efficiently by hash. - (http://www.linuxdemos.org/contentarticle/how_to_start_4k_introdev_with_ibh) - For this, a very useful symbol is exported, : _dt_debug, the address of the - DT_DEBUG's d_ptr. """ def __init__(self): @@ -50,13 +48,17 @@ class BoldLinker(object): self.global_symbols = {} self.undefined_symbols = set() + def add_object(self, filename): - """Add a relocatable file as input.""" + """Add a relocatable file as input. + @param filename: path to relocatable object file to add + """ obj = Elf64(filename) obj.resolve_names() obj.find_symbols() self.objs.append(obj) + def build_symbols_tables(self): """Find out the globally available symbols, as well as the globally undefined ones (which should be found in external libraries.""" @@ -83,9 +85,11 @@ class BoldLinker(object): self.undefined_symbols.difference_update(self.global_symbols) - def build_external(self, with_jump=False, align_jump=True): + def build_external(self, with_jump=False, align_jump=False): """ Generate a fake relocatable object, for dynamic linking. + This object is then automatically added in the list of ebjects to link. + TODO: This part is extremely non-portable. """ # Find out all the undefined symbols. They're the one we'll need to resolve @@ -163,7 +167,6 @@ class BoldLinker(object): class dummy: pass rela_shdr = Elf64_Shdr() rela_shdr.sh_type = SHT_RELA - # rela_shdr.sh_info = fo.shdrs.index(text_shdr) rela_shdr.target = text_shdr rela_shdr.sh_flags = 0 rela_shdr._content = dummy() # We only need a container for relatab... @@ -179,7 +182,6 @@ class BoldLinker(object): reloc.symbol = dummy() reloc.symbol.st_shndx = SHN_UNDEF reloc.symbol.name = "_bold__%s" % i - # reloc.symbol.st_value = 0 relatab.append(reloc) fo.shdrs.append(rela_shdr) fo.sections['.rela.text'] = rela_shdr @@ -196,6 +198,7 @@ class BoldLinker(object): raise LibNotFound(libname) self.shlibs.append(fullname) + def link(self): """Do the actual linking.""" # Prepare two segments. One for .text, the other for .data + .bss @@ -304,13 +307,6 @@ class BoldLinker(object): self.global_symbols["_dt_debug"] = dynamic.dt_debug_address self.global_symbols["_DYNAMIC"] = dynamic.virt_addr - # For now, it's an error. Later, we could try to find them in the shared - # libraries. - #if len(self.undefined_symbols): - # raise UndefinedSymbol(self.undefined_symbols.pop()) - - - # We can now do the actual relocation for i in self.objs: i.apply_relocation(self.global_symbols) @@ -326,6 +322,7 @@ class BoldLinker(object): def toBinArray(self): return self.output.toBinArray() + def tofile(self, file_object): return self.output.toBinArray().tofile(file_object) diff --git a/bold.py b/bold similarity index 71% rename from bold.py rename to bold index 2b19c81..cbeeac5 100755 --- a/bold.py +++ b/bold @@ -7,11 +7,11 @@ # This file is part of bold, the Byte Optimized Linker. # # You can redistribute this file and/or modify it under the terms of the -# GNU Lesser General Public License as published by the Free Software -# Foundation, version 2.1. +# GNU General Public License as published by the Free Software Foundation, +# either version 3 of the License or (at your option) any later version. __author__ = "Amand Tihon " -__version__ = "0.0.1" +__version__ = "0.1.0" from Bold.linker import BoldLinker @@ -19,10 +19,11 @@ from Bold.errors import * from optparse import OptionParser import os, sys + class BoldOptionParser(OptionParser): """Bold option parser.""" global __version__ - _usage_message = "%prog [options] file..." + _usage_message = "%prog [options] objfile..." _version_message = "%%prog version %s" % __version__ _description_message = """A limited ELF linker for x86_64. It is intended to create very small executables with the least possible overhead.""" @@ -32,7 +33,8 @@ intended to create very small executables with the least possible overhead.""" version=self._version_message, description=self._description_message, add_help_option=True, prog="bold") - self.set_defaults(entry="_start", outfile="a.out", raw=False, ccall=False) + self.set_defaults(entry=None, outfile="a.out", raw=False, ccall=False, + align=False) self.add_option("-e", "--entry", action="store", dest="entry", metavar="SYMBOL", help="Set the entry point (default: _start)") @@ -40,15 +42,22 @@ intended to create very small executables with the least possible overhead.""" self.add_option("-l", "--library", action="append", dest="shlibs", metavar="LIBNAME", help="Search for library LIBNAME") + self.add_option("-L", "--library-path", action="append", dest="libpath", + metavar="DIRECTORY", + help="Add DIRECTORY to library search path. (Ignored, for compatibility only.") + self.add_option("-o", "--output", action="store", dest="outfile", metavar="FILE", help="Set output file name (default: a.out)") self.add_option("--raw", action="store_true", dest="raw", - help="Don't include the symbol resolution code (default: include it)") + help="Don't include the builtin external symbols resolution code") self.add_option("-c", "--ccall", action="store_true", dest="ccall", help="Make external symbol callable by C (default: no)") + self.add_option("-a", "--align-ccall", action="store_true", dest="align", + help="Align C callable symbols with actual functions pointers") + def main(): parser = BoldOptionParser() @@ -58,17 +67,12 @@ def main(): print >>sys.stderr, "No input files" return 1 - linker = BoldLinker() + # Take a copy of args + objects = args[:] - for infile in args: - try: - linker.add_object(infile) - except UnsupportedObject, e: - print >>sys.stderr, e - return 1 - except IOError, e: - print >>sys.stderr, e - return 1 + if options.align and not options.ccall: + print >>sys.stderr, "Making external symbols callable by C because of -a." + options.ccall = True if options.ccall and options.raw: # ccall implies that we include the symbol resolution code... @@ -76,22 +80,31 @@ def main(): options.raw = False if not options.raw: - for d in ['data', '/usr/lib/bold/', '/usr/local/lib/bold', '.']: + for d in ['.', 'data', '/usr/lib/bold/', '/usr/local/lib/bold']: f = os.path.join(d, 'bold_ibh-x86_64.o') - try: - linker.add_object(f) + if os.path.isfile(f): + objects.append(f) break - except UnsupportedObject, e: - # file was found, but is not recognized - print >>sys.stderr, e - return 1 - except IOError, e: - # not found, try next directory - pass else: print >>sys.stderr, "Could not find boldsymres-x86_64.o." return 1 + + # Try reordering objects ? + + linker = BoldLinker() + + for infile in objects: + try: + linker.add_object(infile) + except UnsupportedObject, e: + print >>sys.stderr, e + return 1 + except IOError, e: + print >>sys.stderr, e + return 1 + + if options.shlibs: for shlib in options.shlibs: try: @@ -100,11 +113,15 @@ def main(): print >>sys.stderr, e return 1 - linker.entry_point = options.entry + if options.entry is not None: + linker.entry_point = options.entry + else: + if not options.raw: + linker.entry_point = "_bold__ibh_start" try: linker.build_symbols_tables() - linker.build_external(with_jump=options.ccall) + linker.build_external(with_jump=options.ccall, align_jump=options.align) linker.link() except UndefinedSymbol, e: diff --git a/doc/GPL-3 b/doc/GPL-3 new file mode 100644 index 0000000..4432540 --- /dev/null +++ b/doc/GPL-3 @@ -0,0 +1,676 @@ + + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + 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 3 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, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. + diff --git a/doc/copyright b/doc/copyright new file mode 100644 index 0000000..0971c4b --- /dev/null +++ b/doc/copyright @@ -0,0 +1,96 @@ +COPYRIGHT STATEMENTS AND LICENSING TERMS + +Bold is Copyright (C) 2009 Amand "alrj" Tihon + +Bold 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 3, or (at your option) any later +version. + +Bold 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. + +Files that have exception clauses are licensed under the terms of the +GNU General Public License; either version 3, or (at your option) any +later version. + +You should have received a copy of the GNU General Public License along with +Bold. If not, see . + +The following runtime libraries are licensed under the terms of the +GNU General Public License (v3 or later) with version 1.0 of the Bold +Runtime Library Exception (included in this file): + +- Import by hash (runtime/bold_ibh_*) + + + +BOLD RUNTIME LIBRARY EXCEPTION + +Version 1.0, 8 August 2009 + +Copyright (C) 2009 Amand Tihon + +Everyone is permitted to copy and distribute verbatim copies of this +license document, but changing it is not allowed. + +This Bold Runtime Library Exception ("Exception") is an additional +permission under section 7 of the GNU General Public License, version +3 ("GPLv3"). It applies to a given file (the "Runtime Library") that +bears a notice placed by the copyright holder of the file stating that +the file is governed by GPLv3 along with this Exception. + +When you use Bold to link a program, Bold may combine portions of +certain Bold runtime libraries with the compiled program. The purpose +of this Exception is to allow linking non-GPL (including proprietary) +programs to use, in this way, the runtime libraries covered by this +Exception. + +0. Definitions. + +A file is an "Independent Module" if it either requires the Runtime +Library for execution after a Linking Process, or makes use of an +interface provided by the Runtime Library, but is not otherwise based +on the Runtime Library. + +"Bold" means a version of the Byte Optimized Linker, with or without +modifications, governed by version 3 (or a specified later version) of +the GNU General Public License (GPL) with the option of using any +subsequent versions published by the FSF. + +"GPL-compatible Software" is software whose conditions of propagation, +modification and use would permit combination with Bold in accord with +the license of Bold. + +"Target Code" refers to output from any compiler for a real or virtual +target processor architecture, in executable form or suitable for +input to an assembler, loader, linker and/or execution +phase. Notwithstanding that, Target Code does not include data in any +format that is used as a compiler intermediate representation, or used +for producing a compiler intermediate representation. + +The "Linking Process" combines Target Code in intermediate object form, +into a single executable program. + +A Linking Process is "Eligible" if it is done using Bold, alone or +with other GPL-compatible software, or if it is done without using any +work based on Bold. For example, using non-GPL-compatible Software to +optimize any Bold intermediate representations would not qualify as an +Eligible Linking Process. + +1. Grant of Additional Permission. + +You have permission to propagate a work of Target Code formed by +combining the Runtime Library with Independent Modules, even if such +propagation would otherwise violate the terms of GPLv3, provided that +all Target Code was generated by Eligible Compilation Processes. You +may then convey such a combination under terms of your choice, +consistent with the licensing of the Independent Modules. + +2. No Weakening of Bold Copyleft. + +The availability of this Exception does not imply any general +presumption that third-party software is unaffected by the copyleft +requirements of the license of Bold. diff --git a/runtime/bold_ibh-x86_64.asm b/runtime/bold_ibh-x86_64.asm index 5395cd4..0336200 100644 --- a/runtime/bold_ibh-x86_64.asm +++ b/runtime/bold_ibh-x86_64.asm @@ -9,6 +9,10 @@ ; GNU General Public License as published by the Free Software Foundation, ; either version 3 of the License or (at your option) any later version. +; Under Section 7 of GPL version 3, you are granted additional +; permissions described in the Bold Runtime Library Exception, version +; 1.0, as published by Amand Tihon. + ;------------------------------------------------------------------------------ ; alrj's x86_64 version of the import by hash method by parapete, las, leblane. ; See the wonderful thread at http://www.pouet.net/topic.php?which=5392 to @@ -36,7 +40,7 @@ extern main ; must be declared when using this segment .text -_bold__ibh: +_bold__ibh_start: ; {{{ Do the RTLD mov rbx, [_dt_debug] ; rbx points to r_debug mov rbx, [rbx + 8] ; rbx points to link_map -- 2.39.2