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Add __mulodi4 source to src/ext
We need to define this function when compiling with clang -m32 -ftrapv, since otherwise we get link errors, since apparently some versions of libclang_rt.builtins don't define a version of it that works? Or clang doesn't know to look for it? This definition is taken from the LLVM source at https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/builtins/mulodi4.c I've also included the license (dual BSD-ish/MIT-ish).
This commit is contained in:
Nick Mathewson
parent
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LICENSE
104
LICENSE
@ -270,6 +270,110 @@ src/ext/readpassphrase.[ch] are distributed under this license:
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Agency (DARPA) and Air Force Research Laboratory, Air Force
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Materiel Command, USAF, under agreement number F39502-99-1-0512.
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===============================================================================
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src/ext/mulodi4.c is distributed under this license:
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=========================================================================
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compiler_rt License
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=========================================================================
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The compiler_rt library is dual licensed under both the
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University of Illinois "BSD-Like" license and the MIT license.
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As a user of this code you may choose to use it under either
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license. As a contributor, you agree to allow your code to be
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used under both.
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Full text of the relevant licenses is included below.
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=========================================================================
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University of Illinois/NCSA
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Open Source License
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Copyright (c) 2009-2016 by the contributors listed in CREDITS.TXT
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All rights reserved.
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Developed by:
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LLVM Team
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University of Illinois at Urbana-Champaign
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http://llvm.org
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal with the Software without
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restriction, including without limitation the rights to use,
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copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following
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conditions:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the following
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disclaimers.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimers in the documentation and/or other materials
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provided with the distribution.
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* Neither the names of the LLVM Team, University of Illinois
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at Urbana-Champaign, nor the names of its contributors may
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be used to endorse or promote products derived from this
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Software without specific prior written permission.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS WITH THE SOFTWARE.
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=========================================================================
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Copyright (c) 2009-2015 by the contributors listed in CREDITS.TXT
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use,
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||||
copy, modify, merge, publish, distribute, sublicense, and/or sell
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||||
copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following
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conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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=========================================================================
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Copyrights and Licenses for Third Party Software Distributed with LLVM:
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=========================================================================
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The LLVM software contains code written by third parties. Such
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software will have its own individual LICENSE.TXT file in the
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directory in which it appears. This file will describe the
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copyrights, license, and restrictions which apply to that code.
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The disclaimer of warranty in the University of Illinois Open
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Source License applies to all code in the LLVM Distribution, and
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nothing in any of the other licenses gives permission to use the
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names of the LLVM Team or the University of Illinois to endorse
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or promote products derived from this Software.
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===============================================================================
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If you got Tor as a static binary with OpenSSL included, then you should know:
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"This product includes software developed by the OpenSSL Project
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@ -77,3 +77,10 @@ readpassphrase.[ch]
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timeouts/
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William Ahern's hierarchical timer-wheel implementation. MIT license.
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mulodi/
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Contains an overflow-checking 64-bit signed integer multiply
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from LLVM's compiler_rt. For some reason, this is missing from
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32-bit libclang in many places. Dual licensed MIT-license and
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BSD-like license; see mulodi/LICENSE.TXT.
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91
src/ext/mulodi/LICENSE.TXT
Normal file
91
src/ext/mulodi/LICENSE.TXT
Normal file
@ -0,0 +1,91 @@
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==============================================================================
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compiler_rt License
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==============================================================================
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The compiler_rt library is dual licensed under both the University of Illinois
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"BSD-Like" license and the MIT license. As a user of this code you may choose
|
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to use it under either license. As a contributor, you agree to allow your code
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to be used under both.
|
||||
|
||||
Full text of the relevant licenses is included below.
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||||
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||||
==============================================================================
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University of Illinois/NCSA
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Open Source License
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Copyright (c) 2009-2016 by the contributors listed in CREDITS.TXT
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All rights reserved.
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Developed by:
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LLVM Team
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University of Illinois at Urbana-Champaign
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http://llvm.org
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Permission is hereby granted, free of charge, to any person obtaining a copy of
|
||||
this software and associated documentation files (the "Software"), to deal with
|
||||
the Software without restriction, including without limitation the rights to
|
||||
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
|
||||
of the Software, and to permit persons to whom the Software is furnished to do
|
||||
so, subject to the following conditions:
|
||||
|
||||
* Redistributions of source code must retain the above copyright notice,
|
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this list of conditions and the following disclaimers.
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||||
|
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* Redistributions in binary form must reproduce the above copyright notice,
|
||||
this list of conditions and the following disclaimers in the
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documentation and/or other materials provided with the distribution.
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||||
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* Neither the names of the LLVM Team, University of Illinois at
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Urbana-Champaign, nor the names of its contributors may be used to
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endorse or promote products derived from this Software without specific
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prior written permission.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE
|
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SOFTWARE.
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==============================================================================
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Copyright (c) 2009-2015 by the contributors listed in CREDITS.TXT
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||||
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Permission is hereby granted, free of charge, to any person obtaining a copy
|
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of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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||||
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==============================================================================
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Copyrights and Licenses for Third Party Software Distributed with LLVM:
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||||
==============================================================================
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||||
The LLVM software contains code written by third parties. Such software will
|
||||
have its own individual LICENSE.TXT file in the directory in which it appears.
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This file will describe the copyrights, license, and restrictions which apply
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to that code.
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||||
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The disclaimer of warranty in the University of Illinois Open Source License
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applies to all code in the LLVM Distribution, and nothing in any of the
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other licenses gives permission to use the names of the LLVM Team or the
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University of Illinois to endorse or promote products derived from this
|
||||
Software.
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||||
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64
src/ext/mulodi/mulodi4.c
Normal file
64
src/ext/mulodi/mulodi4.c
Normal file
@ -0,0 +1,64 @@
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/*===-- mulodi4.c - Implement __mulodi4 -----------------------------------===
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*
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* The LLVM Compiler Infrastructure
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*
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* This file is dual licensed under the MIT and the University of Illinois Open
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* Source Licenses. See LICENSE.TXT for details.
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*
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* ===----------------------------------------------------------------------===
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*
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* This file implements __mulodi4 for the compiler_rt library.
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*
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* ===----------------------------------------------------------------------===
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*/
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#if 0
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#include "int_lib.h"
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#else
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#define COMPILER_RT_ABI
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#define di_int int64_t
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#include "torint.h"
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#endif
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/* Returns: a * b */
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/* Effects: sets *overflow to 1 if a * b overflows */
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COMPILER_RT_ABI di_int
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__mulodi4(di_int a, di_int b, int* overflow)
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{
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const int N = (int)(sizeof(di_int) * CHAR_BIT);
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const di_int MIN = (di_int)1 << (N-1);
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const di_int MAX = ~MIN;
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*overflow = 0;
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di_int result = a * b;
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if (a == MIN)
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{
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if (b != 0 && b != 1)
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*overflow = 1;
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return result;
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}
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if (b == MIN)
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{
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if (a != 0 && a != 1)
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*overflow = 1;
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return result;
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}
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di_int sa = a >> (N - 1);
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di_int abs_a = (a ^ sa) - sa;
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di_int sb = b >> (N - 1);
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di_int abs_b = (b ^ sb) - sb;
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if (abs_a < 2 || abs_b < 2)
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return result;
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if (sa == sb)
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{
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if (abs_a > MAX / abs_b)
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*overflow = 1;
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}
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else
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{
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if (abs_a > MIN / -abs_b)
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*overflow = 1;
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}
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return result;
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}
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