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* linux: Consolidate sigprocmaskAdhemerval Zanella2019-12-276-220/+3
| | | | | | | | All architectures now uses the Linux generic implementation which uses __NR_rt_sigprocmask. Checked on x86_64-linux-gnu, sparc64-linux-gnu, ia64-linux-gnu, s390x-linux-gnu, and alpha-linux-gnu.
* Fix return code for __libc_signal_* functionsAdhemerval Zanella2019-12-272-15/+15
| | | | | | | | The functions do not fail regardless of the argument value. Also, for Linux the return value is not correct on some platforms due the missing usage of INTERNAL_SYSCALL_ERROR_P / INTERNAL_SYSCALL_ERRNO macros. Checked on x86_64-linux-gnu, i686-linux-gnu, and sparc64-linux-gnu.
* nptl: Remove duplicate internal __SIZEOF_PTHREAD_MUTEX_T (BZ#25241)Adhemerval Zanella2019-12-261-3/+0
| | | | Checked on x86_64-linux-gnu, i686-linux-gnu, and x86_64-linux-gnu-x32.
* Avoid compat symbols for totalorder in powerpc64le IEEE long doubleGabriel F. T. Gomes2019-12-232-0/+18
| | | | | | | | | | | | | | | | | | | | | On powerpc64le, the libm_alias_float128_other_r_ldbl macro is used to create an alias between totalorderf128 and __totalorderlieee128, as well as between the totalordermagf128 and __totalordermaglieee128. However, the totalorder* and totalordermag* functions changed their parameter type since commit ID 42760d764649 and got compat symbols for their old versions. With this change, the aforementioned macro would create two conflicting aliases for __totalorderlieee128 and __totalordermaglieee128. This patch avoids the creation of the alias between the IEEE long double symbols (__totalorderl*ieee128) and the compat symbols, because the IEEE long double functions have never been exported thus don't need such compat symbol. Tested for powerpc64le. Reviewed-by: Joseph Myers <joseph@codesourcery.com>
* ldbl-128ibm-compat: Add *cvt functionsGabriel F. T. Gomes2019-12-234-1/+103
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds IEEE long double versions of q*cvt* functions for powerpc64le. Unlike all other long double to/from string conversion functions, these do not rely on internal functions that can take floating-point numbers with different formats and act on them accordingly, instead, the related files are rebuilt with the -mabi=ieeelongdouble compiler flag set. Having -mabi=ieeelongdouble passed to the compiler causes the object files to be marked with a .gnu_attribute that is incompatible with the .gnu_attribute in files built with -mabi=ibmlongdouble (the default). The difference causes error messages similar to the following: ld: libc_pic.a(s_isinfl.os) uses IBM long double, libc_pic.a(ieee128-qefgcvt_r.os) uses IEEE long double. collect2: error: ld returned 1 exit status make[2]: *** [../Makerules:649: libc_pic.os] Error 1 Although this warning is useful in other situations, the library actually needs to have functions with different long double formats, so .gnu_attribute generation is explicitly disabled for these files with the use of -mno-gnu-attribute. Tested for powerpc64le on the branch that actually enables the sysdeps/ieee754/ldbl-128ibm-compat for powerpc64le. Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>
* aarch64: Optimized memset for Kunpeng processor.Xuelei Zhang2019-12-194-2/+119
| | | | | | | | | | | | | | | Due to the branch prediction issue of Kunpeng processor, we found memset_generic has poor performance on middle sizes setting, and so we reconstructed the logic, expanded the loop by 4 times in set_long to solve the problem, even when setting below 1K sizes have benefit. Another change is that DZ_ZVA seems no work when setting zero, so we discarded it and used set_long to set zero instead. Fewer branches and predictions also make the zero case have slightly improvement. Checked on aarch64-linux-gnu. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
* aarch64: Optimized strlen for strlen_asimdXuelei Zhang2019-12-192-17/+29
| | | | | | | | | | | Optimize the strlen implementation by using vector operations and loop unrolling in main loop.Compared to __strlen_generic,it reduces latency of cases in bench-strlen by 7%~18% when the length of src is greater than 128 bytes, with gains throughout the benchmark. Checked on aarch64-linux-gnu. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
* aarch64: Add Huawei Kunpeng to tunable cpu listXuelei Zhang2019-12-192-0/+4
| | | | | | | | | | | Kunpeng processer is a 64-bit Arm-compatible CPU released by Huawei, and we have already signed a copyright assignement with the FSF. This patch adds its to cpu list, and related macro for IFUNC. Checked on aarch64-linux-gnu. Reviewed-by: Szabolcs Nagy <Szabolcs.Nagy@arm.com>
* aarch64: Optimized implementation of memrchrXuelei Zhang2019-12-191-0/+165
| | | | | | | | | | | Considering the excellent performance of memchr.S on glibc 2.30, the same algorithm is used to find chrin. Compared to memrchr.c, this method with memrchr.S achieves an average performance improvement of 58% based on benchtest and its extension cases. Checked on aarch64-linux-gnu. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
* aarch64: Optimized implementation of strnlenXuelei Zhang2019-12-191-1/+51
| | | | | | | | | | | Optimize the strlen implementation by using vector operations and loop unrooling in main loop. Compared to aarch64/strnlen.S, it reduces latency of cases in bench-strnlen by 11%~24% when the length of src is greater than 64 bytes, with gains throughout the benchmark. Checked on aarch64-linux-gnu. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
* aarch64: Optimized implementation of strcpyXuelei Zhang2019-12-191-32/+27
| | | | | | | | | | | Optimize the strcpy implementation by using vector loads and operations in main loop.Compared to aarch64/strcpy.S, it reduces latency of cases in bench-strlen by 5%~18% when the length of src is greater than 64 bytes, with gains throughout the benchmark. Checked on aarch64-linux-gnu. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
* aarch64: Optimized implementation of memcmpXuelei Zhang2019-12-191-53/+79
| | | | | | | | | | | The loop body is expanded from a 16-byte comparison to a 64-byte comparison, and the usage of ldp is replaced by the Post-index mode to the Base plus offset mode. Hence, compare can faster 18% around > 128 bytes in all. Checked on aarch64-linux-gnu. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
* Consolidate wait3 implementationsAdhemerval Zanella2019-12-193-73/+0
| | | | | | The generic one calls wait4. Checked on x86_64-linux-gnu.
* Implement waitpid in terms of wait4Adhemerval Zanella2019-12-194-76/+2
| | | | | | This also consolidate all waitpid implementations. Checked on x86_64-linux-gnu.
* linux: Use waitid on wait4 if __NR_wait4 is not definedAdhemerval Zanella2019-12-193-1/+90
| | | | | | | | | | | | | | | | | | | | | | If the wait4 syscall is not available (such as y2038 safe 32-bit systems) waitid should be used instead. However prior Linux 5.4 waitid is not a full superset of other wait syscalls, since it does not include support for waiting for the current process group. It is possible to emulate wait4 by issuing an extra syscall to get the current process group, but it is inherent racy: after the current process group is received and before it is passed to waitid a signal could arrive causing the current process group to change. So waitid is used if wait4 is not defined iff the build is enabled with a minimum kernel if 5.4+. The new assume __ASSUME_WAITID_PID0_P_PGID is added and an error is issued if waitid can not be implemented by either __NR_wait4 or __NR_waitid && __ASSUME_WAITID_PID0_P_PGID. Checked on x86_64-linux-gnu and i686-linux-gnu. Co-authored-by: Alistair Francis <alistair.francis@wdc.com>
* Implement wait in terms of waitpidAdhemerval Zanella2019-12-193-97/+0
| | | | | | | | | The POSIX implementation is used as default and both BSD and Linux version are removed. It simplifies the implementation for architectures that do not provide either __NR_waitpid or __NR_wait4. Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.
* nptl: Move waitpid implementation to libcAdhemerval Zanella2019-12-1927-27/+0
| | | | Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.
* nptl: Move wait implementation to libcAdhemerval Zanella2019-12-1927-54/+0
| | | | Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.
* Remove __waitpid_nocancelAdhemerval Zanella2019-12-195-42/+6
| | | | | | | | | It enables and disables cancellation with pthread_setcancelstate before calling the waitpid. It simplifies the waitpid implementation for architectures that do not provide either __NR_waitpid or __NR_wait4. Checked on x86_64-linux-gnu.
* Fix __libc_signal_block_all on sparc64Adhemerval Zanella2019-12-191-6/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The posix_spawn on sparc issues invalid sigprocmask calls: rt_sigprocmask(0xffe5e15c /* SIG_??? */, ~[], 0xffe5e1dc, 8) = -1 EINVAL (Invalid argument) Which make support/tst-support_capture_subprocess fails with random output (due the child signal being wrongly captured by the parent). Tracking the culprit it seems to be a wrong code generation in the INTERNAL_SYSCALL due the automatic sigset_t used on __libc_signal_block_all: return INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_BLOCK, &SIGALL_SET, set, _NSIG / 8); Where SIGALL_SET is defined as: ((__sigset_t) { .__val = {[0 ... _SIGSET_NWORDS-1 ] = -1 } }) Building the expanded __libc_signal_block_all on sparc64 with recent compiler (gcc 8.3.1 and 9.1.1): #include <signal> int _libc_signal_block_all (sigset_t *set) { INTERNAL_SYSCALL_DECL (err); return INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_BLOCK, &SIGALL_SET, set, _NSIG / 8); } The first argument (SIG_BLOCK) is not correctly set on 'o0' register: __libc_signal_block_all: save %sp, -304, %sp add %fp, 1919, %o0 mov 128, %o2 sethi %hi(.LC0), %o1 call memcpy, 0 or %o1, %lo(.LC0), %o1 add %fp, 1919, %o1 mov %i0, %o2 mov 8, %o3 mov 103, %g1 ta 0x6d; bcc,pt %xcc, 1f mov 0, %g1 sub %g0, %o0, %o0 mov 1, %g1 1: sra %o0, 0, %i0 return %i7+8 nop Where if SIGALL_SET is defined a const object, gcc correctly sets the expected kernel argument in correct register: sethi %hi(.LC0), %o1 call memcpy, 0 or %o1, %lo(.LC0), %o1 -> mov 1, %o0 add %fp, 1919, %o1 Another possible fix is use a static const object. Although there should not be a difference between a const compound literal and a static const object, the gcc C99 status page [1] has a note stating that this optimization is not implemented: "const-qualified compound literals could share storage with each other and with string literals, but currently don't.". This patch fixes it by moving both sigset_t that represent the signal sets to static const data object. It generates slight better code where the object reference is used directly instead of a stack allocation plus the content materialization. Checked on x86_64-linux-gnu, i686-linux-gnu, and sparc64-linux-gnu. [1] https://gcc.gnu.org/c99status.html
* powerpc: Do not run IFUNC resolvers for LD_DEBUG=unused [BZ #24214]Adhemerval Zanella2019-12-192-4/+6
| | | | | | | | | | | This patch adds the missing bits for powerpc and fixes both tst-ifunc-fault-lazy and tst-ifunc-fault-bindnow failures on powerpc-linux-gnu. Checked on powerpc-linux-gnu and powerpc-linux-gnu-power4. Reviewed-by: Florian Weimer <fweimer@redhat.com> Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
* hurd: Do not make sigprocmask available in ld.soFlorian Weimer2019-12-183-11/+2
| | | | | | | | | | | After commit f7649d5780aa4682393b9daedd653e4d9c12784c ("dlopen: Do not block signals"), the dynamic linker no longer uses sigprocmask, which means that it does not have to be made available explicitly on hurd. This reverts commit 892badc9bbcd4a6f8c2eb6c8a99be3aa22517532 ("hurd: Make __sigprocmask GLIBC_PRIVATE") and commit d5ed9ba29a3c818b3433a1784862494968abda45 ("hurd: Fix ld.so link"), but keeps the comment changes from the second commit.
* hurd: Make getrandom honour GRND_NONBLOCKJames Clarke2019-12-171-1/+5
| | | | | | * sysdeps/mach/hurd/getrandom.c (__getrandom): Open the random source with O_NONBLOCK when the GRND_NONBLOCK flag is provided. Message-Id: <20191217182929.90989-1-jrtc27@jrtc27.com>
* mips: Do not include hi and lo in __SYSCALL_CLOBBERS for R6Dragan Mladjenovic2019-12-163-6/+21
| | | | | | | | | | | | | | | | | | | GCC 10 (PR 91233) won't silently allow registers that are not architecturally available to be present in the clobber list anymore, resulting in build failure for mips*r6 targets in form of: ... .../sysdep.h:146:2: error: the register ‘lo’ cannot be clobbered in ‘asm’ for the current target 146 | __asm__ volatile ( \ | ^~~~~~~ This is because base R6 ISA doesn't define hi and lo registers w/o DSP extension. This patch provides the alternative definitions of __SYSCALL_CLOBBERS for r6 targets that won't include those registers. * sysdeps/unix/sysv/linux/mips/mips32/sysdep.h (__SYSCALL_CLOBBERS): Exclude hi and lo from the clobber list for __mips_isa_rev >= 6. * sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h (__SYSCALL_CLOBBERS): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h (__SYSCALL_CLOBBERS): Likewise.
* ldbl-128ibm-compat: Add ISO C99 versions of scanf functionsGabriel F. T. Gomes2019-12-1322-39/+522
| | | | | | | | | | | | | | | In the format string for *scanf functions, the '%as', '%aS', and '%a[]' modifiers behave differently depending on ISO C99 compatibility. When _GNU_SOURCE is defined and -std=c89 is passed to the compiler, these functions behave like ascanf, and the modifiers allocate memory for the output. Otherwise, the ISO C99 compliant version of these functions is used, and the modifiers consume a floating-point argument. This patch adds the IEEE binary128 variant of ISO C99 compliant functions for the third long double format on powerpc64le. Tested for powerpc64le. Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>
* ldbl-128ibm-compat: Fix selection of GNU and ISO C99 scanfGabriel F. T. Gomes2019-12-133-4/+12
| | | | | | | | | | | | | | | | | | | | | Since commit commit 03992356e6fedc5a5e9d32df96c1a2c79ea28a8f Author: Zack Weinberg <zackw@panix.com> Date: Sat Feb 10 11:58:35 2018 -0500 Use C99-compliant scanf under _GNU_SOURCE with modern compilers. the selection of the GNU versions of scanf functions requires both _GNU_SOURCE and -std=c89. This patch changes the tests in ldbl-128ibm-compat so that they actually test the GNU versions (without this change, the redirection to the ISO C99 version always happens, so GNU versions of the new implementation (e.g. __scanfieee128) were left untested). Tested for powerpc64le. Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>
* hurd: Fix local PLTSamuel Thibault2019-12-133-4/+9
| | | | | | | | | | * include/sys/random.h (__getrandom): Add hidden prototype. * stdlib/getrandom.c (getrandom): Rename to hidden definition __getrandom. Add weak alias. * sysdeps/mach/hurd/getrandom.c (getrandom): Likewise. * sysdeps/unix/sysv/linux/getrandom.c (getrandom): Likewise. * sysdeps/mach/hurd/getentropy.c (getentropy): Use __getrandom instead of getrandom.
* hurd: Fix __close_nocancel_nostatus availabilitySamuel Thibault2019-12-134-6/+37
| | | | | | | | | | | | | | Not only libc/rtld use __close_nocancel_nostatus. * sysdeps/mach/hurd/Makefile [$(subdir) == io] (sysdep_routines): Add close_nocancel_nostatus. * sysdeps/mach/hurd/Versions (libc): Add __close_nocancel_nostatus to GLIBC_PRIVATE. * sysdeps/mach/hurd/not-cancel.h (__close_nocancel_nostatus): Declare function instead of defining inline. [IS_IN (libc) || IS_IN (rtld)] (__close_nocancel_nostatus): Make function hidden. * sysdeps/mach/hurd/close_nocancel_nostatus.c: New file.
* hurd: add getrandom and getentropy implementationsAndrew Eggenberger2019-12-132-0/+107
| | | | | * sysdeps/mach/hurd/getentropy.c: New file. * sysdeps/mach/hurd/getrandom.c: Likewise.
* hurd: Implement __close_nocancel_nostatusSamuel Thibault2019-12-131-0/+62
| | | | * sysdeps/mach/hurd/not-cancel.h: New file.
* S390: Use sysdeps/ieee754/dbl-64/wordsize-64 on s390x.Stefan Liebler2019-12-111-0/+1
| | | | | This patch enables the usage of implementations in sysdeps/ieee754/dbl-64/wordsize-64 on 64bit s390x.
* S390: Implement roundtoint and converttoint and define TOINT_INTRINSICS.Stefan Liebler2019-12-111-0/+53
| | | | | | | This patch implements roundtoint and convertoint for s390 by using the load-fp-integer and convert-to-fixed instructions. Both functions are using "round to nearest with ties away from zero" rounding mode and do not raise inexact exceptions.
* S390: Implement math-barriers math_opt_barrier and math_force_eval.Stefan Liebler2019-12-111-0/+46
| | | | | This patch implements the s390 specific math barriers in order to omit the store and load from stack if possible.
* S390: Use libc_fe* macros in fe* functions.Stefan Liebler2019-12-119-124/+27
| | | | | | | | | | | This patch updates the s390 specific functions fegetround, fesetround, feholdexcept, fesetenv, feupdateenv, fegetexceptflag, fetestexcept, fesetexceptflag, fetestexceptflag. Now those functions are using the libc_fe* macros if possible. Furthermore fegetexceptflag is now returning the exception from dxc field shifted to the usual exception-flags. Thus a special fetestexceptflag implementation is not needed anymore.
* S390: Implement libc_fe* macros.Stefan Liebler2019-12-111-0/+250
| | | | | | | | This patch provides the s390 specific implementation for libc_feholdexcept, libc_fesetround, libc_feholdexcept_setround, libc_fetestexcept, libc_fesetenv, libc_feupdateenv_test, libc_feupdateenv, libc_feholdsetround_ctx, libc_feresetround_ctx, libc_feholdsetround_noex_ctx and libc_feresetround_noex_ctx.
* S390: Use convert-to-fixed instruction for llround functions.Stefan Liebler2019-12-113-0/+127
| | | | | | If compiled with z196 zarch support, the convert-to-fixed instruction is used to implement llround, llroundf, llroundl. Otherwise the common-code implementation is used.
* S390: Use convert-to-fixed instruction for lround functions.Stefan Liebler2019-12-113-0/+142
| | | | | | If compiled with z196 zarch support, the convert-to-fixed instruction is used to implement lround, lroundf, lroundl. Otherwise the common-code implementation is used.
* S390: Use convert-to-fixed instruction for llrint functions.Stefan Liebler2019-12-113-0/+151
| | | | | | If compiled with z196 zarch support, the convert-to-fixed instruction is used to implement llrint, llrintf, llrintl. Otherwise the common-code implementation is used.
* S390: Use convert-to-fixed instruction for lrint functions.Stefan Liebler2019-12-113-0/+166
| | | | | | If compiled with z196 zarch support, the convert-to-fixed instruction is used to implement lrint, lrintf, lrintl. Otherwise the common-code implementation is used.
* S390: Use load-fp-integer instruction for roundeven functions.Stefan Liebler2019-12-113-0/+116
| | | | | | If compiled with z196 zarch support, the load-fp-integer instruction is used to implement roundeven, roundevenf, roundevenl. Otherwise the common-code implementation is used.
* Adjust s_copysignl.c regarding code style.Stefan Liebler2019-12-111-8/+9
| | | | | | | This patch just adjusts the generic implementation regarding code style. No functional change. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Adjust s_ceilf.c and s_ceill.c regarding code style.Stefan Liebler2019-12-112-53/+92
| | | | | | | This patch just adjusts the generic implementation regarding code style. No functional change. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Adjust s_floorf.c and s_floorl.c regarding code style.Stefan Liebler2019-12-112-54/+90
| | | | | | | This patch just adjusts the generic implementation regarding code style. No functional change. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Adjust s_rintf.c and s_rintl.c regarding code style.Stefan Liebler2019-12-112-40/+53
| | | | | | | This patch just adjusts the generic implementation regarding code style. No functional change. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Adjust s_nearbyintf.c and s_nearbyintl.c regarding code style.Stefan Liebler2019-12-112-55/+68
| | | | | | | This patch just adjusts the generic implementation regarding code style. No functional change. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Use GCC builtins for copysign functions if desired.Stefan Liebler2019-12-116-15/+31
| | | | | | | | | | | | This patch is always using the corresponding GCC builtin for copysignf, copysign, and is using the builtin for copysignl, copysignf128 if the USE_FUNCTION_BUILTIN macros are defined to one in math-use-builtins.h. Altough the long double version is enabled by default we still need the macro and the alternative implementation as the _Float128 version of the builtin is not available with all supported GCC versions. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Use GCC builtins for round functions if desired.Stefan Liebler2019-12-116-0/+37
| | | | | | | | | | | | This patch is using the corresponding GCC builtin for roundf, round, roundl and roundf128 if the USE_FUNCTION_BUILTIN macros are defined to one in math-use-builtins.h. This is the case for s390 if build with at least --march=z196 --mzarch. Otherwise the generic implementation is used. The code of the generic implementation is not changed. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Use GCC builtins for trunc functions if desired.Stefan Liebler2019-12-116-0/+37
| | | | | | | | | | | | This patch is using the corresponding GCC builtin for truncf, trunc, truncl and truncf128 if the USE_FUNCTION_BUILTIN macros are defined to one in math-use-builtins.h. This is the case for s390 if build with at least --march=z196 --mzarch. Otherwise the generic implementation is used. The code of the generic implementation is not changed. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Use GCC builtins for ceil functions if desired.Stefan Liebler2019-12-116-1/+37
| | | | | | | | | | | | This patch is using the corresponding GCC builtin for ceilf, ceil, ceill and ceilf128 if the USE_FUNCTION_BUILTIN macros are defined to one in math-use-builtins.h. This is the case for s390 if build with at least --march=z196 --mzarch. Otherwise the generic implementation is used. The code of the generic implementation is not changed. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Use GCC builtins for floor functions if desired.Stefan Liebler2019-12-116-0/+37
| | | | | | | | | | | | This patch is using the corresponding GCC builtin for floorf, floor, floorl and floorf128 if the USE_FUNCTION_BUILTIN macros are defined to one in math-use-builtins.h. This is the case for s390 if build with at least --march=z196 --mzarch. Otherwise the generic implementation is used. The code of the generic implementation is not changed. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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