Commit 33034600 authored by Nick Mathewson's avatar Nick Mathewson 🦀
Browse files

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).
parent 159ea7a8
......@@ -270,6 +270,110 @@ src/ext/readpassphrase.[ch] are distributed under this license:
Agency (DARPA) and Air Force Research Laboratory, Air Force
Materiel Command, USAF, under agreement number F39502-99-1-0512.
===============================================================================
src/ext/mulodi4.c is distributed under this license:
=========================================================================
compiler_rt License
=========================================================================
The compiler_rt library is dual licensed under both the
University of Illinois "BSD-Like" license and the MIT license.
As a user of this code you may choose to use it under either
license. As a contributor, you agree to allow your code to be
used under both.
Full text of the relevant licenses is included below.
=========================================================================
University of Illinois/NCSA
Open Source License
Copyright (c) 2009-2016 by the contributors listed in CREDITS.TXT
All rights reserved.
Developed by:
LLVM Team
University of Illinois at Urbana-Champaign
http://llvm.org
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, this list of conditions and the following
disclaimers.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimers in the documentation and/or other materials
provided with the distribution.
* Neither the names of the LLVM Team, University of Illinois
at Urbana-Champaign, nor the names of its contributors may
be used to endorse or promote products derived from this
Software without specific prior written permission.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS 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 WITH THE SOFTWARE.
=========================================================================
Copyright (c) 2009-2015 by the contributors listed in CREDITS.TXT
Permission is hereby granted, free of charge, to any person
obtaining a copy 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, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE 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 THE SOFTWARE.
=========================================================================
Copyrights and Licenses for Third Party Software Distributed with LLVM:
=========================================================================
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. This file will describe the
copyrights, license, and restrictions which apply to that code.
The disclaimer of warranty in the University of Illinois Open
Source License applies to all code in the LLVM Distribution, and
nothing in any of the other licenses gives permission to use the
names of the LLVM Team or the University of Illinois to endorse
or promote products derived from this Software.
===============================================================================
If you got Tor as a static binary with OpenSSL included, then you should know:
"This product includes software developed by the OpenSSL Project
......
......@@ -77,3 +77,10 @@ readpassphrase.[ch]
timeouts/
William Ahern's hierarchical timer-wheel implementation. MIT license.
mulodi/
Contains an overflow-checking 64-bit signed integer multiply
from LLVM's compiler_rt. For some reason, this is missing from
32-bit libclang in many places. Dual licensed MIT-license and
BSD-like license; see mulodi/LICENSE.TXT.
==============================================================================
compiler_rt License
==============================================================================
The compiler_rt library is dual licensed under both the University of Illinois
"BSD-Like" license and the MIT license. As a user of this code you may choose
to use it under either license. As a contributor, you agree to allow your code
to be used under both.
Full text of the relevant licenses is included below.
==============================================================================
University of Illinois/NCSA
Open Source License
Copyright (c) 2009-2016 by the contributors listed in CREDITS.TXT
All rights reserved.
Developed by:
LLVM Team
University of Illinois at Urbana-Champaign
http://llvm.org
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,
this list of conditions and the following disclaimers.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimers in the
documentation and/or other materials provided with the distribution.
* Neither the names of the LLVM Team, University of Illinois at
Urbana-Champaign, nor the names of its contributors may be used to
endorse or promote products derived from this Software without specific
prior written permission.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
CONTRIBUTORS 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 WITH THE
SOFTWARE.
==============================================================================
Copyright (c) 2009-2015 by the contributors listed in CREDITS.TXT
Permission is hereby granted, free of charge, to any person obtaining a copy
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,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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
THE SOFTWARE.
==============================================================================
Copyrights and Licenses for Third Party Software Distributed with LLVM:
==============================================================================
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.
This file will describe the copyrights, license, and restrictions which apply
to that code.
The disclaimer of warranty in the University of Illinois Open Source License
applies to all code in the LLVM Distribution, and nothing in any of the
other licenses gives permission to use the names of the LLVM Team or the
University of Illinois to endorse or promote products derived from this
Software.
/*===-- mulodi4.c - Implement __mulodi4 -----------------------------------===
*
* The LLVM Compiler Infrastructure
*
* This file is dual licensed under the MIT and the University of Illinois Open
* Source Licenses. See LICENSE.TXT for details.
*
* ===----------------------------------------------------------------------===
*
* This file implements __mulodi4 for the compiler_rt library.
*
* ===----------------------------------------------------------------------===
*/
#if 0
#include "int_lib.h"
#else
#define COMPILER_RT_ABI
#define di_int int64_t
#include "torint.h"
#endif
/* Returns: a * b */
/* Effects: sets *overflow to 1 if a * b overflows */
COMPILER_RT_ABI di_int
__mulodi4(di_int a, di_int b, int* overflow)
{
const int N = (int)(sizeof(di_int) * CHAR_BIT);
const di_int MIN = (di_int)1 << (N-1);
const di_int MAX = ~MIN;
*overflow = 0;
di_int result = a * b;
if (a == MIN)
{
if (b != 0 && b != 1)
*overflow = 1;
return result;
}
if (b == MIN)
{
if (a != 0 && a != 1)
*overflow = 1;
return result;
}
di_int sa = a >> (N - 1);
di_int abs_a = (a ^ sa) - sa;
di_int sb = b >> (N - 1);
di_int abs_b = (b ^ sb) - sb;
if (abs_a < 2 || abs_b < 2)
return result;
if (sa == sb)
{
if (abs_a > MAX / abs_b)
*overflow = 1;
}
else
{
if (abs_a > MIN / -abs_b)
*overflow = 1;
}
return result;
}
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment