diff options
author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-08-20 19:14:56 +0200 |
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committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-08-20 19:14:56 +0200 |
commit | f76453c31593957fec1a99b986bfa5506618b79c (patch) | |
tree | da353c882fb9b2261c9871bcb9e3876a3e6ed7f6 /nptl/pt-vfork.c | |
parent | 58695b88a9deaecbcf7794760cc333177edaa2b4 (diff) | |
parent | 78bd7499af46d739ce94410eaeea006e874ca9e5 (diff) |
Merge tag 'glibc-2.22' into baseline
The GNU C Library
=================
The GNU C Library version 2.22 is now available.
The GNU C Library is used as *the* C library in the GNU system and
in GNU/Linux systems, as well as many other systems that use Linux
as the kernel.
The GNU C Library is primarily designed to be a portable
and high performance C library. It follows all relevant
standards including ISO C11 and POSIX.1-2008. It is also
internationalized and has one of the most complete
internationalization interfaces known.
The GNU C Library webpage is at http://www.gnu.org/software/libc/
Packages for the 2.22 release may be downloaded from:
http://ftpmirror.gnu.org/libc/
http://ftp.gnu.org/gnu/libc/
The mirror list is at http://www.gnu.org/order/ftp.html
NEWS for version 2.22
=====================
* The following bugs are resolved with this release:
438, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152, 14094,
14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969, 16159, 16339,
16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538, 16559, 16560,
16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293, 17322, 17403,
17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620, 17621, 17628,
17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833, 17836, 17841,
17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965, 17967, 17969,
17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007, 18019, 18020,
18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042, 18043, 18046,
18047, 18049, 18068, 18080, 18093, 18100, 18104, 18110, 18111, 18116,
18125, 18128, 18134, 18138, 18185, 18196, 18197, 18206, 18210, 18211,
18217, 18219, 18220, 18221, 18234, 18244, 18245, 18247, 18287, 18319,
18324, 18333, 18346, 18371, 18383, 18397, 18400, 18409, 18410, 18412,
18418, 18422, 18434, 18444, 18457, 18468, 18469, 18470, 18479, 18483,
18495, 18496, 18497, 18498, 18502, 18507, 18508, 18512, 18513, 18519,
18520, 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, 18536,
18539, 18540, 18542, 18544, 18545, 18546, 18547, 18549, 18553, 18557,
18558, 18569, 18583, 18585, 18586, 18592, 18593, 18594, 18602, 18612,
18613, 18619, 18633, 18641, 18643, 18648, 18657, 18676, 18694, 18696.
* Cache information can be queried via sysconf() function on s390 e.g. with
_SC_LEVEL1_ICACHE_SIZE as argument.
* A buffer overflow in gethostbyname_r and related functions performing DNS
requests has been fixed. If the NSS functions were called with a
misaligned buffer, the buffer length change due to pointer alignment was
not taken into account. This could result in application crashes or,
potentially arbitrary code execution, using crafted, but syntactically
valid DNS responses. (CVE-2015-1781)
* The time zone file parser has been made more robust against crafted time
zone files, avoiding heap buffer overflows related to the processing of
the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
large time zone data files. Overly long time zone specifiers in the TZ
variable no longer result in stack overflows and crashes.
* A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
for LD and GD on x86 and x86-64, has been implemented. You will need
binutils-2.24 or later to enable this optimization.
* Character encoding and ctype tables were updated to Unicode 7.0.0, using
new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
Hat). These updates cause user visible changes, such as the fix for bug
17998.
* CVE-2014-8121 The NSS backends shared internal state between the getXXent
and getXXbyYY NSS calls for the same database, causing a denial-of-service
condition in some applications.
* Added vector math library named libmvec with the following vectorized x86_64
implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
pow, powf.
The library can be disabled with --disable-mathvec. Use of the functions is
enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
Shared library libmvec.so is linked in as needed when using -lm (no need to
specify -lmvec explicitly for not static builds).
Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
* A new fmemopen implementation has been added with the goal of POSIX
compliance. The new implementation fixes the following long-standing
issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
old implementation is still present for use be by existing binaries.
* The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
releases. It has been fixed to match 2.19 and older, but binaries built
against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
* Port to Native Client running on ARMv7-A (--host=arm-nacl).
Contributed by Roland McGrath (Google).
Contributors
============
This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports. These include:
Adhemerval Zanella
Alan Modra
Alexandre Oliva
Andreas Schwab
Andrew Senkevich
Andriy Rysin
Arjun Shankar
Aurelien Jarno
Benno Schulenberg
Brad Hubbard
Carlos O'Donell
Chris Metcalf
Christian Schmidt
Chung-Lin Tang
Cong Wang
Cyril Hrubis
Daniel Marjamäki
David S. Miller
Dmitry V. Levin
Eric Rannaud
Evangelos Foutras
Feng Gao
Florian Weimer
Gleb Fotengauer-Malinovskiy
H.J. Lu
Igor Zamyatin
J William Piggott
James Cowgill
James Lemke
John David Anglin
Joseph Myers
Kevin Easton
Khem Raj
Leonhard Holz
Mark Wielaard
Marko Myllynen
Martin Galvan
Martin Sebor
Matthew Fortune
Mel Gorman
Mike Frysinger
Miroslav Lichvar
Nathan Lynch
Ondřej Bílka
Paul Eggert
Paul Pluzhnikov
Pavel Kopyl
Pravin Satpute
Rajalakshmi Srinivasaraghavan
Rical Jasan
Richard Henderson
Roland McGrath
Rüdiger Sonderfeld
Samuel Thibault
Siddhesh Poyarekar
Stefan Liebler
Steve Ellcey
Szabolcs Nagy
Torvald Riegel
Tulio Magno Quites Machado Filho
Vincent Bernat
Wilco Dijkstra
Yaakov Selkowitz
Zack Weinberg
Diffstat (limited to 'nptl/pt-vfork.c')
-rw-r--r-- | nptl/pt-vfork.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/nptl/pt-vfork.c b/nptl/pt-vfork.c new file mode 100644 index 0000000000..aebb7b6bd6 --- /dev/null +++ b/nptl/pt-vfork.c @@ -0,0 +1,77 @@ +/* vfork ABI-compatibility entry points for libpthread. + Copyright (C) 2014-2015 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <unistd.h> +#include <shlib-compat.h> + +/* libpthread used to have its own vfork implementation that differed + from libc's only in having a pointless micro-optimization. There + is no longer any use to having a separate copy in libpthread, but + the historical ABI requires it. For static linking, there is no + need to provide anything here--the libc version will be linked in. + For shared library ABI compatibility, there must be __vfork and + vfork symbols in libpthread.so; so we define them using IFUNC to + redirect to the libc function. */ + +/* Note! If the architecture doesn't support IFUNC, then we need an + alternate target-specific mechanism to implement this. So we just + assume IFUNC here and require that the target override this file + if necessary. + + If the architecture can assume all supported versions of gcc will + produce a tail-call to __libc_vfork, consider including the version + in sysdeps/unix/sysv/linux/aarch64/pt-vfork.c. */ + +#if !HAVE_IFUNC +# error "must write pt-vfork for this machine or get IFUNC support" +#endif + +#if (SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_20) \ + || SHLIB_COMPAT (libpthread, GLIBC_2_1_2, GLIBC_2_20)) + +extern __typeof (vfork) __libc_vfork; /* Defined in libc. */ + +static __typeof (vfork) * +__attribute__ ((used)) +vfork_resolve (void) +{ + return &__libc_vfork; +} + +# ifdef HAVE_ASM_SET_DIRECTIVE +# define DEFINE_VFORK(name) \ + asm (".set " #name ", vfork_resolve\n" \ + ".globl " #name "\n" \ + ".type " #name ", %gnu_indirect_function"); +# else +# define DEFINE_VFORK(name) \ + asm (#name " = vfork_resolve\n" \ + ".globl " #name "\n" \ + ".type " #name ", %gnu_indirect_function"); +# endif +#endif + +#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_20) +DEFINE_VFORK (vfork_ifunc) +compat_symbol (libpthread, vfork_ifunc, vfork, GLIBC_2_0); +#endif + +#if SHLIB_COMPAT (libpthread, GLIBC_2_1_2, GLIBC_2_20) +DEFINE_VFORK (__vfork_ifunc) +compat_symbol (libpthread, __vfork_ifunc, __vfork, GLIBC_2_1_2); +#endif |