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Conflicts:
NEWS
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Honoring the LD_POINTER_GUARD environment variable in AT_SECURE mode
has security implications. This commit enables pointer guard
unconditionally, and the environment variable is now ignored.
[BZ #18928]
* sysdeps/generic/ldsodefs.h (struct rtld_global_ro): Remove
_dl_pointer_guard member.
* elf/rtld.c (_rtld_global_ro): Remove _dl_pointer_guard
initializer.
(security_init): Always set up pointer guard.
(process_envvars): Do not process LD_POINTER_GUARD.
(cherry picked from commit a014cecd82b71b70a6a843e250e06b541ad524f7)
Conflicts:
NEWS
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When converting a struct hostent response to struct gaih_addrtuple, the
gethosts macro (which is called from gaih_inet) used alloca, without
malloc fallback for large responses. This commit changes this code to
use calloc unconditionally.
This commit also consolidated a second hostent-to-gaih_addrtuple
conversion loop (in gaih_inet) to use the new conversion function.
(cherry picked from commit 4ab2ab03d4351914ee53248dc5aef4a8c88ff8b9)
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Instead, we store the data we need from the return value of
readdir in an object of the new type struct readdir_result.
This type is independent of the layout of struct dirent.
(cherry picked from commit 5171f3079f2cc53e0548fc4967361f4d1ce9d7ea)
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makecontext()" [BZ #18508].
On s390/s390x backtrace(buffer, size) returns the series of called functions until
"makecontext_ret" and additional entries (up to "size") with "makecontext_ret".
GDB-backtrace is also warning:
"Backtrace stopped: previous frame identical to this frame (corrupt stack?)"
To reproduce this scenario you have to setup a new context with makecontext()
and activate it with setcontext(). See e.g. cf() function in testcase stdlib/tst-makecontext.c.
Or see bug in libgo "Bug 66303 - runtime.Caller() returns infinitely deep stack frames
on s390x " (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66303).
This patch omits the cfi_startproc/cfi_endproc directives in ENTRY/END macro of
__makecontext_ret. Thus no frame information is generated in .eh_frame and backtrace
stops after __makecontext_ret. There is also no .eh_frame info for _start or
thread_start functions.
ChangeLog:
[BZ #18508]
* stdlib/Makefile ($(objpfx)tst-makecontext3):
Depend on $(libdl).
* stdlib/tst-makecontext.c (cf): Test if _Unwind_Backtrace
is not called infinitely times.
(backtrace_helper): New function.
(trace_arg): New struct.
(st1): Enlarge stack size.
* sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:
(__makecontext_ret): Omit cfi_startproc and cfi_endproc.
* sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S:
Likewise.
(cherry picked from commit 890b7a4b33d482b5c768ab47d70758b80227e9bc)
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This patch uses sigprocmask(SIG_SETMASK) instead of SIG_BLOCK
in setcontext, swapcontext.
(cherry picked from commit 2e807f29595eb5b1e5d0decc6e356a3562ecc58e)
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Conflicts:
NEWS
nss/nss_files/files-XXX.c
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(cherry picked from commit 8dc9751764eb1bedf06d19695524b31a16773413)
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This fixes a bug in the way the results from __nscd_getai are collected:
for every returned result a new entry is first added to the
gaih_addrtuple list, but if that result doesn't match the request this
entry remains uninitialized. So for this non-matching result an extra
result with uninitialized content is returned.
To reproduce (with nscd running):
$ getent ahostsv4 localhost
127.0.0.1 STREAM localhost
127.0.0.1 DGRAM
127.0.0.1 RAW
(null) STREAM
(null) DGRAM
(null) RAW
(cherry picked from commit a071766ebfd853179ac39f9773f894029bf86d36)
Conflicts:
ChangeLog
NEWS
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This patch fixes the ELFv2 gprof entry point since the ABI
does not define function descriptors. It fixes BZ#17213.
Conflicts:
NEWS
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This patch adds no FMA generation for e_pow to avoid precision issues
for powerpc. This fixes BZ#18104.
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Backport of commit 2f438e20ab591641760e97458d5d1569942eced5
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This patch fixes the ELFv2 gprof entry point since the ABI
does not define function descriptors. It fixes BZ#17213.
This is a backport of a53fbd8e6cd2f69bdfa3431d616a5f332aea6664.
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Now that MEMCPY_OK_FOR_FWD_MEMMOVE should be define on memcopy.h there
is no need to specialized powerpc memmove implementation. This patch
moves the define set to powerpc memcopy and cleanup its definition on
powerpc code.
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This patch fixes some compiler due trailing data in #undef directives
and due missing prototypes.
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This patch add the missing ifunc tests definition for memmove ppc32
optimization patch (commit 07aedd7).
This is a backport of 91f4b564bd7bedcd93e7047cad570ce292d6330b.
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This patch changes power7 memcpy to use VSX instructions only when
memory is aligned to quardword. It is to avoid unaligned kernel traps
on non-cacheable memory (for instance, memory-mapped I/O).
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This patch adds a optimized memmove for power7 by using the optimized
power7 memcpy for forward copying.
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This patch adds an optimized memmove optimization for POWER7/powerpc64.
Basically the idea is to use the memcpy for POWER7 on non-overlapped
memory regions and a optimized backward memcpy for memory regions
that overlap (similar to the idea of string/memmove.c).
The backward memcpy algorithm used is similar the one use for memcpy for
POWER7, with adjustments done for alignment. The difference is memory
is always aligned to 16 bytes before using VSX/altivec instructions.
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This patch removes the powerpc specific logic in memmove and instead
include default implementation with MEMCPY_OK_FOR_FWD_MEMMOVE defined.
This lead in a increase performance, since the constraints to use
memcpy in powerpc code are too restrictive and memcpy can be used for
any forward memmove.
This is a backport of d6f68bbef4427850c2901728a1d13efc0e687297.
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This patch adds an ifunc power7 strcat symbol that uses the logic on
sysdeps/powerpc/strcat.c but call power7 strlen/strcpy symbols instead
of default ones.
This is a backport of bc8ea38590070604006399e42469087e943fc8ec.
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Linux commit dd58a092c4202f2bd490adab7285b3ff77f8e467 added the
PPC_FEATURE2_VEC_CRYPTO auvx capability to indicate whether to
hardware supports vector crypto hardware instructions. This patch
adds its definition to powerpc hwcap bits.
This is a backport of db22400947e1c82153e5270d23fed53fc1e3a659.
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This patch fixes few failures in nearbyintl() where the fraction part is
close to 0.5.i The new tests added report few extra failures in
nearbyint_downward and nearbyint_towardzero which is a known issue.
Fixes #17031.
This is a backport of 754c5a08aacb44895d1ab97c553ce424eb43f761.
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Optimization is achieved on 8 byte aligned strings with double word
comparison using cmpb instruction. On unaligned strings loop unrolling
is applied for Power7 gain.
It is a backport of e23d3d2690bf63207b1a47e83a94693daebbbfe5.
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This patch fixes the optimized ppc64/power7 strncat strlen call for
static build without ifunc enabled. The strlen symbol to call in such
situation is just strlen, instead of __GI_strlen (since the __GI_
alias is just created for shared objects).
It is a backport of ed36bfa18faf9be457575568e64b8409e46caa22.
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This patch fixes some powerpc32 and powerpc64 builds with
--disable-multi-arch option along with different --with-cpu=powerN.
It cleanups the Implies directories by removing the multiarch
folder for non multiarch config and also fixing two assembly
implementations: powerpc64/power7/strncat.S that is calling the
wrong strlen; and power8/fpu/s_isnan.S that misses the hidden_def and
weak_alias directives.
It is a backport of de21c33c068c8e39afb5711613a7c083c11ce6a1.
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This patch replaces the insrdi by insrwi in powerpc32 assembly.
It is a backport of d298c41635ce7f2dc7c3eccc842fe3aa754c0c8e.
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This patch fixes a similar issue to
736c304a1ab4cee36a2f3343f1698bc0abae4608, where for PPC32 if the symbol
is defined as hidden (memchr) then compiler will create a local branc
(symbol@local) and the linker will not create a required PLT call to
make the ifunc work. It changes the default hidden symbol (__GI_memchr)
to default memchr symbol for powerpc32 (__memchr_ppc32).
Backport of 3d2badacf185fac740a2992240a817fb2ca325af.
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This patch moves the hypotf multiarch implementation to correct path.
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* sysdeps/sparc/sparc64/multiarch/memcpy-niagara2.S: Add missing
membar to avoid block loads/stores to overlap previous stores.
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prlimit and prlimit64 have been added in the main <bits/resource.h>, but
not in the SPARC specific version. Fix that.
Note: this is Debian bug#703559, reported by Emilio Pozuelo Monfort
<pochu@debian.org>
(cherry picked from commit d16e6ec7ca2c861ba681e3a2fbd431725774292e)
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EFD_SEMAPHORE has been added in the main <bits/eventfd.h>, but not in
the SPARC specific version. Fix that.
(cherry picked from commit 83df9ad0cc861ef24f08a88c5a4c055e2516d33c)
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The optimization is achieved by following techniques:
> data alignment [gain from aligned memory access on read/write]
> POWER7 gains performance with loop unrolling/unwinding
[gain by reduction of branch penalty].
> zero padding done by calling optimized memset
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This patch changes de default symbol redirection for internal call of
memcpy, memset, memchr, and strlen to the IFUNC resolved ones. The
performance improvement is noticeable in algorithms that uses these
symbols extensible, like the regex functions.
This is a backport of 19c4bec0f43599eecc2f32de96ae179cd7d64053.
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[BZ #16885]
* sysdeps/sparc/sparc64/strcmp.S: Fix end comparison handling when
multiple zero bytes exist at the end of a string.
Reported by Aurelien Jarno <aurelien@aurel32.net>
* string/test-strcmp.c (check): Add explicit test for situations where
there are multiple zero bytes after the first.
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Besides fixing the bugzilla, this also fixes corner-cases where the high
and low double differ greatly in magnitude, and handles a denormal
input without resorting to a fp rescale.
[BZ #16740]
[BZ #16619]
* sysdeps/ieee754/ldbl-128ibm/s_frexpl.c (__frexpl): Rewrite.
* math/libm-test.inc (frexp_test_data): Add tests.
Backport of aa5f0ff11ad2cc85277c64cf65c723a9664e1149 and
9860b0450275ad2b69cb9360fd01d5c122a65fc5.
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This patch fixes the powerpc32 optimized nearbyint/nearbyintf bogus
results for FE_DOWNWARD rounding mode. This is due wrong instructions
sequence used in the rounding calculation (two subtractions instead of
adition and a subtraction).
Fixes BZ#16815.
Backport of 8bd70862e11023e7f827f240a5a214f847ae982d.
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Fix for values near a power of two, and some tidies.
[BZ #16739]
* sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c (__nextafterl): Correct
output when value is near a power of two. Use int64_t for lx and
remove casts. Use decimal rather than hex exponent constants.
Don't use long double multiplication when double will suffice.
* math/libm-test.inc (nextafter_test_data): Add tests.
* NEWS: Add 16739 and 16786 to bug list.
Backport of b0abbc21034f0e5edc49023d8fda0616173faf17.
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Typo fix.
* sysdeps/powerpc/powerpc64/power7/memrchr.S: Correct stream hint.
Backport of af6b17973cbc07ac06cfb40eeab5cc2391fb489a.
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https://sourceware.org/ml/binutils/2014-03/msg00033.html removes the
"magic" treatment of symbols defined in a .toc section.
* sysdeps/powerpc/powerpc64/start.S: Add @toc to toc symbol reference.
Backport of 483818d768ed99a5edf4114298a75ebedaee8d5c.
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[BZ #16786]
* sysdeps/powerpc/powerpc64/fpu/s_copysign.S: Don't trash stack.
Backport of c859b32e9d76afe8a3f20bb9528961a573c06937.
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This patch fixes the MFVSRD_R3_V1 macro that encodes 'mfvsrd r3,vs1'
(to support old binutils) for little endian.
Backport of 757d9dd5c3efa56fac75965abc014faaae7b7895.
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This patch add an optimized strpbrk for POWER7 by using a different
algorithm than default implementation: it constructs a table based on
the 'accept' argument and use this table to check for any occurance on
the input string. The idea is similar as x86_64 uses.
For PowerPC some tunings were added, such as unroll loops and memory
clear using VSX instructions.
Backport of 6f23d0939e9651d8ac3c77a835fb6464b35a1dc4
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This patch add a optimized strcspn for POWER7 by using a different
algorithm than default implementation: it constructs a table based on
the 'accept' argument and use this table to check for any occurance
on the input string. The idea is similar as x86_64 uses.
For PowerPC some tunings were added, such as unroll loops and align
stack memory to table to 16 bytes (so VSX clean can ran without
alignment issues).
Backport of 6eaf95cbfa0031ea267682dc2c9c17ed3e3dc167
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The roundl assembly implementation
(sysdeps/powerpc/powerpc64/fpu/s_roundl.S)
returns wrong results for some inputs where first double is a exact
integer and the precision is determined by second long double.
Checking on implementation comments and history, I am very confident the
assembly implementation was based on a version before commit
5c68d401698a58cf7da150d9cce769fa6679ba5f that fixes BZ#2423 (Errors in
long double (ldbl-128ibm) rounding functions in glibc-2.4).
By just removing the implementation and make the build select
sysdeps/ieee754/ldbl-128ibm/s_roundl.c instead fixes the failing math.
This fixes 16707.
Backport of c7de50250367167d8c9f35594b264f6a0af8dd0c
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The nearbyintl assembly implementation
(sysdeps/powerpc/powerpc64/fpu/s_nearbyintl.S)
returns wrong results for some inputs where first double is a exact
integer and the precision is determined by second long double.
Checking on implementation comments and history, I am very confident the
assembly implementation was based on a version before commit
5c68d401698a58cf7da150d9cce769fa6679ba5f that fixes BZ#2423 (Errors in
long double (ldbl-128ibm) rounding functions in glibc-2.4).
By just removing the implementation and make the build select
sysdeps/ieee754/ldbl-128ibm/s_nearbyintl.c instead fixes the failing
math.
Fixes BZ#16706.
Backport of 98fb27a373f37554232e0060eef1a5bb00a07eb0
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The ceill assembly implementation (sysdeps/powerpc/powerpc64/fpu/s_ceill.S)
returns wrong results for some inputs where first double is a exact
integer and the precision is determined by second long double.
Checking on implementation comments and history, I am very confident the
assembly implementation was based on a version before commit
5c68d401698a58cf7da150d9cce769fa6679ba5f that fixes BZ#2423 (Errors in
long double (ldbl-128ibm) rounding functions in glibc-2.4).
By just removing the implementation and make the build select
sysdeps/ieee754/ldbl-128ibm/s_ceill.c instead fixes the failing math.
Fixes BZ#16701.
Backport of 374f7f61214967bb4e2257695aeeeecc2a77f369
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This patch fixes an issue for powerpc32-fpu static build which fails
with an 'bzero' undefined reference. This patch adds bzero ifunc selector
for static builds and fixes the '__bzero_ppc' reference to default
memset symbol (since static memset build does not provide ifunc
selector).
Fixes BZ#16689.
Backport of dd3946c615184e1957a0cb09352cac72be5d6d5b.
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This patch makes the strspn ifunc selector build for static builds.
This is a backport of 27c7220a483bda576533aa9a0a9b42175644b1a1
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