Commit Graph

14684 Commits

Author SHA1 Message Date
Sunil K Pandey
157bdb5f89 x86-64: Add vector acosh/acoshf to libmvec microbenchmark
Add vector acosh/acoshf and input files to libmvec microbenchmark.

libmvec-acosh-inputs:
  90% Normal random distribution
  range: (1.0, DBL_MAX)
  mean: 1.0
  sigma: 8.0
  10% uniform random distribution in range (1.0, 1.0e6)

libmvec-acoshf-inputs:
  90% Normal random distribution
  range: (1.0f, FLT_MAX)
  mean: 1.0f
  sigma: 4.0f
  10% uniform random distribution in range (1.0f, 1.0e6f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:36:46 -08:00
Sunil K Pandey
0050c9a45d x86-64: Add vector atanh/atanhf to libmvec microbenchmark
Add vector atanh/atanhf and input files to libmvec microbenchmark.

libmvec-atanh-inputs:
  90% Normal random distribution
  range: (-1.0, 1.0)
  mean: 0.0
  sigma: 1.0
  10% uniform random distribution in range (-1.0, 1.0)

libmvec-atanhf-inputs:
  90% Normal random distribution
  range: (-1.0f, 1.0f)
  mean: 0.0f
  sigma: 1.0f
  10% uniform random distribution in range (-1.0f, 1.0f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:36:41 -08:00
Sunil K Pandey
171817d8c0 x86-64: Add vector log1p/log1pf to libmvec microbenchmark
Add vector log1p/log1pf and input files to libmvec microbenchmark.

libmvec-log1p-inputs:
  70% Normal random distribution
  range: (-1.0, DBL_MAX)
  mean: 0.0
  sigma: 50.0
  30% uniform random distribution in range (-1.0, 1.0e6)

libmvec-log1pf-inputs:
  70% Normal random distribution
  range: (-1.0f, FLT_MAX)
  mean: 0.0f
  sigma: 50.0f
  30% uniform random distribution in range (-1.0f, 1.0e6f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:36:36 -08:00
Sunil K Pandey
b6b2be5c2f x86-64: Add vector log2/log2f to libmvec microbenchmark
Add vector log2/log2f and input files to libmvec microbenchmark.

libmvec-log2-inputs:
  70% Normal random distribution
  range: (0.0, DBL_MAX)
  mean: 1.0
  sigma: 50.0
  30% uniform random distribution in range (0.0, 1.0e6)

libmvec-log2f-inputs:
  70% Normal random distribution
  range: (0.0f, FLT_MAX)
  mean: 1.0f
  sigma: 50.0f
  30% uniform random distribution in range (0.0f, 1.0e6f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:36:31 -08:00
Sunil K Pandey
e43b757e06 x86-64: Add vector log10/log10f to libmvec microbenchmark
Add vector log10/log10f and input files to libmvec microbenchmark.

libmvec-log10-inputs:
  70% Normal random distribution
  range: (0.0, DBL_MAX)
  mean: 1.0
  sigma: 50.0
  30% uniform random distribution in range (0.0, 1.0e6)

libmvec-log10f-inputs:
  70% Normal random distribution
  range: (0.0f, FLT_MAX)
  mean: 1.0f
  sigma: 50.0f
  30% uniform random distribution in range (0.0f, 1.0e6f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:36:23 -08:00
Sunil K Pandey
16aec30154 x86-64: Add vector atan2/atan2f to libmvec microbenchmark
Add vector atan2/atan2f and input files to libmvec microbenchmark.

libmvec-atan2-inputs:
  arg1:
    90% Normal random distribution
    range: (-DBL_MAX, DBL_MAX)
    mean: 0.0
    sigma: 4.0
    10% uniform random distribution in range (-1.0e6, 1.0e6)
  arg2:
    90% Normal random distribution
    range: (-DBL_MAX, DBL_MAX)
    mean: 0.0
    sigma: 4.0
    10% uniform random distribution in range (-1.0e6, 1.0e6)

libmvec-atan2f-inputs:
  arg1:
    90% Normal random distribution
    range: (-FLT_MAX, FLT_MAX)
    mean: 0.0f
    sigma: 4.0f
    10% uniform random distribution in range (-1.0e6f, 1.0e6f)
  arg2:
    90% Normal random distribution
    range: (-FLT_MAX, FLT_MAX)
    mean: 0.0f
    sigma: 4.0f
    10% uniform random distribution in range (-1.0e6f, 1.0e6f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:36:14 -08:00
Sunil K Pandey
fec48238b2 x86-64: Add vector cbrt/cbrtf to libmvec microbenchmark
Add vector cbrt/cbrtf and input files to libmvec microbenchmark.

libmvec-cbrt-inputs:
  90% Normal random distribution
  range: (-DBL_MAX, DBL_MAX)
  mean: 0.0
  sigma: 10.0
  10% uniform random distribution in range (-1000.0, 1000.0)

libmvec-cbrtf-inputs:
  90% Normal random distribution
  range: (-FLT_MAX, FLT_MAX)
  mean: 0.0f
  sigma: 10.0f
  10% uniform random distribution in range (-1000.0f, 1000.0f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:36:06 -08:00
Sunil K Pandey
6acc09c589 x86-64: Add vector sinh/sinhf to libmvec microbenchmark
Add vector sinh/sinhf and input files to libmvec microbenchmark.

libmvec-sinh-inputs:
  90% Normal random distribution
  range: (-710.0, 710.0)
  mean: 0.0
  sigma: 32.0
  10% uniform random distribution in range (-500.0, 500.0)

libmvec-sinhf-inputs:
  90% Normal random distribution
  range: (-89.0f, 89.0f)
  mean: 0.0f
  sigma: 16.0f
  10% uniform random distribution in range (-50.0f, 50.0f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:36:00 -08:00
Sunil K Pandey
049555aad4 x86-64: Add vector expm1/expm1f to libmvec microbenchmark
Add vector expm1/expm1f and input files to libmvec microbenchmark.

libmvec-expm1-inputs:
  90% Normal random distribution
  range: (-708.0, 709.0)
  mean: 0.0
  sigma: 16.0
  10% uniform random distribution in range (-500.0, 500.0)

libmvec-expm1f-inputs:
  90% Normal random distribution
  range: (-87.0f, 88.0f)
  mean: 0.0f
  sigma: 8.0f
  10% uniform random distribution in range (-50.0f, 50.0f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:35:54 -08:00
Sunil K Pandey
54cf4f31fe x86-64: Add vector cosh/coshf to libmvec microbenchmark
Add vector cosh/coshf and input files to libmvec microbenchmark.

libmvec-cosh-inputs:
  90% Normal random distribution
  range: (-710.0, 710.0)
  mean: 0.0
  sigma: 32.0
  10% uniform random distribution in range (-500.0, 500.0)

libmvec-coshf-inputs:
  90% Normal random distribution
  range: (-89.0f, 89.0f)
  mean: 0.0f
  sigma: 16.0f
  10% uniform random distribution in range (-50.0f, 50.0f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:35:49 -08:00
Sunil K Pandey
abebb26108 x86-64: Add vector exp10/exp10f to libmvec microbenchmark
Add vector exp10/exp10f and input files to libmvec microbenchmark.

libmvec-exp10-inputs:
  90% Normal random distribution
  range: (-307.0, 308.0)
  mean: 0.0
  sigma: 16.0
  10% uniform random distribution in range (-250.0, 250.0)

libmvec-exp10f-inputs:
  90% Normal random distribution
  range: (-37.0f, 38.0f)
  mean: 0.0f
  sigma: 8.0f
  10% uniform random distribution in range (-25.0f, 25.0f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:35:43 -08:00
Sunil K Pandey
b0e4360778 x86-64: Add vector exp2/exp2f to libmvec microbenchmark
Add vector exp2/exp2f and input files to libmvec microbenchmark.

libmvec-exp2-inputs:
  90% Normal random distribution
  range: (-1022.0, 1024.0)
  mean: 0.0
  sigma: 16.0
  10% uniform random distribution in range (-1000.0, 1000.0)

libmvec-exp2f-inputs:
  90% Normal random distribution
  range: (-126.0f, 128.0f)
  mean: 0.0f
  sigma: 8.0f
  10% uniform random distribution in range (-100.0f, 100.0f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:35:34 -08:00
Sunil K Pandey
b0a1107042 x86-64: Add vector hypot/hypotf to libmvec microbenchmark
Add vector hypot/hypotf and input files to libmvec microbenchmark.

libmvec-hypot-inputs:
  arg1:
    90% Normal random distribution
    range: (-DBL_MAX, DBL_MAX)
    mean: 0.0
    sigma: 10.0
    10% uniform random distribution in range (-1000.0, 1000.0)
  arg1:
    90% Normal random distribution
    range: (-DBL_MAX, DBL_MAX)
    mean: 0.0
    sigma: 10.0
    10% uniform random distribution in range (-1000.0, 1000.0)

libmvec-hypotf-inputs:
  arg1:
    90% Normal random distribution
    range: (-FLT_MAX, FLT_MAX)
    mean: 0.0f
    sigma: 10.0f
    10% uniform random distribution in range (-1000.0f, 1000.0f)
  arg2:
    90% Normal random distribution
    range: (-FLT_MAX, FLT_MAX)
    mean: 0.0f
    sigma: 10.0f
    10% uniform random distribution in range (-1000.0f, 1000.0f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:35:16 -08:00
Sunil K Pandey
e96f25427c x86-64: Add vector asin/asinf to libmvec microbenchmark
Add vector asin/asinf and input files to libmvec microbenchmark.

libmvec-asin-inputs:
  90% Normal random distribution
  range: (-1.0, 1.0)
  mean: 0.0
  sigma: 1.0
  10% uniform random distribution in range (-1.0, 1.0)

libmvec-asinf-inputs:
  90% Normal random distribution
  range: (-1.0f, 1.0f)
  mean: 0.0f
  sigma: 1.0f
  10% uniform random distribution in range (-1.0f, 1.0f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:35:11 -08:00
Sunil K Pandey
7e05d94ea1 x86-64: Add vector atan/atanf to libmvec microbenchmark
Add vector atan/atanf and input files to libmvec microbenchmark.

libmvec-atan-inputs:
  arg1:
    90% Normal random distribution
    range: (-DBL_MAX, DBL_MAX)
    mean: 0.0
    sigma: 4.0
    10% uniform random distribution in range (-1.0e6, 1.0e6)
  arg2:
    90% Normal random distribution
    range: (-DBL_MAX, DBL_MAX)
    mean: 0.0
    sigma: 4.0
    10% uniform random distribution in range (-1.0e6, 1.0e6)

libmvec-atanf-inputs:
  arg1:
    90% Normal random distribution
    range: (-FLT_MAX, FLT_MAX)
    mean: 0.0f
    sigma: 4.0f
    10% uniform random distribution in range (-1.0e6f, 1.0e6f)
  arg2:
    90% Normal random distribution
    range: (-FLT_MAX, FLT_MAX)
    mean: 0.0f
    sigma: 4.0f
    10% uniform random distribution in range (-1.0e6f, 1.0e6f)

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-02-06 12:24:32 -08:00
H.J. Lu
c328d0152d x86_64/multiarch: Sort sysdep_routines and put one entry per line 2022-02-05 16:42:17 -08:00
H.J. Lu
1283948f23 x86: Improve L to support L(XXX_SYMBOL (YYY, ZZZ)) 2022-02-05 16:42:17 -08:00
H.J. Lu
0e0199a9e0 x86-64: Fix strcmp-evex.S
Change "movl %edx, %rdx" to "movl %edx, %edx" in:

commit 8418eb3ff4
Author: Noah Goldstein <goldstein.w.n@gmail.com>
Date:   Mon Jan 10 15:35:39 2022 -0600

    x86: Optimize strcmp-evex.S
2022-02-04 11:11:08 -08:00
H.J. Lu
c15efd011c x86-64: Fix strcmp-avx2.S
Change "movl %edx, %rdx" to "movl %edx, %edx" in:

commit b77b06e0e2
Author: Noah Goldstein <goldstein.w.n@gmail.com>
Date:   Mon Jan 10 15:35:38 2022 -0600

    x86: Optimize strcmp-avx2.S
2022-02-04 11:09:10 -08:00
Sunil K Pandey
811124ce08 x86-64: Add vector acos/acosf to libmvec microbenchmark
Add vector acos/acosf and input files to libmvec microbenchmark.

libmvec-acos-inputs:
  90% Normal random distribution
  range: (-1.0, 1.0)
  mean: 0.0
  sigma: 1.0
  10% uniform random distribution in range (-1.0, 1.0)

libmvec-acosf-inputs:
  90% Normal random distribution
  range: (-1.0f, 1.0f)
  mean: 0.0f
  sigma: 1.0f
  10% uniform random distribution in range (-1.0f, 1.0f)

Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
2022-02-03 17:37:06 -08:00
Noah Goldstein
8418eb3ff4 x86: Optimize strcmp-evex.S
Optimization are primarily to the loop logic and how the page cross
logic interacts with the loop.

The page cross logic is at times more expensive for short strings near
the end of a page but not crossing the page. This is done to retest
the page cross conditions with a non-faulty check and to improve the
logic for entering the loop afterwards. This is only particular cases,
however, and is general made up for by more than 10x improvements on
the transition from the page cross -> loop case.

The non-page cross cases as well are nearly universally improved.

test-strcmp, test-strncmp, test-wcscmp, and test-wcsncmp all pass.

Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
2022-02-03 16:41:41 -06:00
Noah Goldstein
b77b06e0e2 x86: Optimize strcmp-avx2.S
Optimization are primarily to the loop logic and how the page cross
logic interacts with the loop.

The page cross logic is at times more expensive for short strings near
the end of a page but not crossing the page. This is done to retest
the page cross conditions with a non-faulty check and to improve the
logic for entering the loop afterwards. This is only particular cases,
however, and is general made up for by more than 10x improvements on
the transition from the page cross -> loop case.

The non-page cross cases are improved most for smaller sizes [0, 128]
and go about even for (128, 4096]. The loop page cross logic is
improved so some more significant speedup is seen there as well.

test-strcmp, test-strncmp, test-wcscmp, and test-wcsncmp all pass.

Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
2022-02-03 16:41:38 -06:00
Adhemerval Zanella
798d716df7 linux: Fix missing __convert_scm_timestamps (BZ #28860)
Commit 948ce73b31 made recvmsg/recvmmsg to always call
__convert_scm_timestamps for 64 bit time_t symbol, so adjust it to
always build it for __TIMESIZE != 64.

It fixes build for architecture with 32 bit time_t support when
configured with minimum kernel of 5.1.
2022-02-03 16:59:16 -03:00
Gleb Fotengauer-Malinovskiy
97ba273b50 linux: __get_nprocs_sched: do not feed CPU_COUNT_S with garbage [BZ #28850]
Pass the actual number of bytes returned by the kernel.

Fixes: 33099d72e4 ("linux: Simplify get_nprocs")
Reviewed-by: Dmitry V. Levin <ldv@altlinux.org>
2022-02-03 11:04:08 +00:00
Carlos O'Donell
e0beb0c9f1 Regenerate configure. 2022-02-03 00:10:03 -05:00
Florian Weimer
6c33b01843 Linux: Use ptrdiff_t for __rseq_offset
This matches the data size initial-exec relocations use on most
targets.

Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2022-02-02 22:37:20 +01:00
Adhemerval Zanella
6289d28d3c posix: Replace posix_spawnattr_tc{get,set}pgrp_np with posix_spawn_file_actions_addtcsetpgrp_np
The posix_spawnattr_tcsetpgrp_np works on a file descriptor (the
controlling terminal), so it would make more sense to actually fit
it on the file actions API.

Also, POSIX_SPAWN_TCSETPGROUP is not really required since it is
implicit by the presence of tcsetpgrp file action.

The posix/tst-spawn6.c is also fixed when TTY can is not present.

Checked on x86_64-linux-gnu and i686-linux-gnu.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-02-02 08:34:16 -03:00
Stafford Horne
3f35e7d193 or1k: Define PI_STATIC_AND_HIDDEN
PI_STATIC_AND_HIDDEN means that references to static functions, data
and symbols with hidden visibility do not need any run-time relocations
after the final link, with the build flags used by glibc.

OpenRISC follows this so enabled PI_STATIC_AND_HIDDEN by adding
configure.ac and generating configure.

Suggested-by: Florian Weimer <fweimer@redhat.com>
2022-02-02 20:05:12 +09:00
Samuel Thibault
355bc7f736 SET_RELHOOK: merge i386 and x86_64, and move to sysdeps/mach/hurd/x86
It is not Hurd-specific, but H.J. Lu wants it there.

Also, dc.a can be used to avoid hardcoding .long vs .quad and thus use
the same implementation for i386 and x86_64.
2022-02-01 20:08:25 +00:00
Ben Woodard
ce9a68c57c elf: Fix runtime linker auditing on aarch64 (BZ #26643)
The rtld audit support show two problems on aarch64:

  1. _dl_runtime_resolve does not preserve x8, the indirect result
      location register, which might generate wrong result calls
      depending of the function signature.

  2. The NEON Q registers pushed onto the stack by _dl_runtime_resolve
     were twice the size of D registers extracted from the stack frame by
     _dl_runtime_profile.

While 2. might result in wrong information passed on the PLT tracing,
1. generates wrong runtime behaviour.

The aarch64 rtld audit support is changed to:

  * Both La_aarch64_regs and La_aarch64_retval are expanded to include
    both x8 and the full sized NEON V registers, as defined by the
    ABI.

  * dl_runtime_profile needed to extract registers saved by
    _dl_runtime_resolve and put them into the new correctly sized
    La_aarch64_regs structure.

  * The LAV_CURRENT check is change to only accept new audit modules
    to avoid the undefined behavior of not save/restore x8.

  * Different than other architectures, audit modules older than
    LAV_CURRENT are rejected (both La_aarch64_regs and La_aarch64_retval
    changed their layout and there are no requirements to support multiple
    audit interface with the inherent aarch64 issues).

  * A new field is also reserved on both La_aarch64_regs and
    La_aarch64_retval to support variant pcs symbols.

Similar to x86, a new La_aarch64_vector type to represent the NEON
register is added on the La_aarch64_regs (so each type can be accessed
directly).

Since LAV_CURRENT was already bumped to support bind-now, there is
no need to increase it again.

Checked on aarch64-linux-gnu.

Co-authored-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-02-01 14:49:46 -03:00
Adhemerval Zanella
32612615c5 elf: Issue la_symbind for bind-now (BZ #23734)
The audit symbind callback is not called for binaries built with
-Wl,-z,now or when LD_BIND_NOW=1 is used, nor the PLT tracking callbacks
(plt_enter and plt_exit) since this would change the expected
program semantics (where no PLT is expected) and would have performance
implications (such as for BZ#15533).

LAV_CURRENT is also bumped to indicate the audit ABI change (where
la_symbind flags are set by the loader to indicate no possible PLT
trace).

To handle powerpc64 ELFv1 function descriptor, _dl_audit_symbind
requires to know whether bind-now is used so the symbol value is
updated to function text segment instead of the OPD (for lazy binding
this is done by PPC64_LOAD_FUNCPTR on _dl_runtime_resolve).

Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu,
powerpc64-linux-gnu.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-02-01 14:49:46 -03:00
Adhemerval Zanella
254d3d5aef elf: Fix initial-exec TLS access on audit modules (BZ #28096)
For audit modules and dependencies with initial-exec TLS, we can not
set the initial TLS image on default loader initialization because it
would already be set by the audit setup.  However, subsequent thread
creation would need to follow the default behaviour.

This patch fixes it by setting l_auditing link_map field not only
for the audit modules, but also for all its dependencies.  This is
used on _dl_allocate_tls_init to avoid the static TLS initialization
at load time.

Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-02-01 14:49:46 -03:00
H.J. Lu
3fb18fd80c elf: Add <dl-r_debug.h>
Add <dl-r_debug.h> to get the adddress of the r_debug structure after
relocation and its offset before relocation from the PT_DYNAMIC segment
to support DT_DEBUG, DT_MIPS_RLD_MAP_REL and DT_MIPS_RLD_MAP.

Co-developed-by: Xi Ruoyao <xry111@mengyan1223.wang>
2022-01-31 07:05:48 -08:00
H.J. Lu
77a602ebb0 tst-socket-timestamp-compat.c: Check __TIMESIZE [BZ #28837]
time_t size is defined by __TIMESIZE, not __WORDSIZE.  Check __TIMESIZE,
instead of __WORDSIZE, for time_t size.  This fixes BZ #28837.
2022-01-29 06:57:07 -08:00
Adhemerval Zanella
948ce73b31 Linux: Only generate 64 bit timestamps for 64 bit time_t recvmsg/recvmmsg
The timestamps created by __convert_scm_timestamps only make sense for
64 bit time_t programs, 32 bit time_t programs will ignore 64 bit time_t
timestamps since SO_TIMESTAMP will be defined to old values (either by
glibc or kernel headers).

Worse, if the buffer is not suffice MSG_CTRUNC is set to indicate it
(which breaks some programs [1]).

This patch makes only 64 bit time_t recvmsg and recvmmsg to call
__convert_scm_timestamps.  Also, the assumption to called it is changed
from __ASSUME_TIME64_SYSCALLS to __TIMESIZE != 64 since the setsockopt
might be called by libraries built without __TIME_BITS=64.  The
MSG_CTRUNC is only set for the 64 bit symbols, it should happen only
if 64 bit time_t programs run older kernels.

Checked on x86_64-linux-gnu and i686-linux-gnu.

[1] https://github.com/systemd/systemd/pull/20567

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-01-28 18:18:27 -03:00
Adhemerval Zanella
8fba672472 linux: Fix ancillary 64-bit time timestamp conversion (BZ #28349, BZ#28350)
The __convert_scm_timestamps only updates the control message last
pointer for SOL_SOCKET type, so if the message control buffer contains
multiple ancillary message types the converted timestamp one might
overwrite a valid message.

The test checks if the extra ancillary space is correctly handled
by recvmsg/recvmmsg, where if there is no extra space for the 64-bit
time_t converted message the control buffer should be marked with
MSG_TRUNC.  It also check if recvmsg/recvmmsg handle correctly multiple
ancillary data.

Checked on x86_64-linux and on i686-linux-gnu on both 5.11 and
4.15 kernel.

Co-authored-by: Fabian Vogt <fvogt@suse.de>

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-01-28 17:46:44 -03:00
Florian Weimer
af121ae3e7 Fix glibc 2.34 ABI omission (missing GLIBC_2.34 in dynamic loader)
The glibc 2.34 release really should have added a GLIBC_2.34
symbol to the dynamic loader. With it, we could move functions such
as dlopen or pthread_key_create that work on process-global state
into the dynamic loader (once we have fixed a longstanding issue
with static linking).  Without the GLIBC_2.34 symbol, yet another
new symbol version would be needed because old glibc will fail to
load binaries due to the missing symbol version in ld.so that newly
linked programs will require.

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-01-27 18:52:05 +01:00
H.J. Lu
501246c5e2 x86: Use CHECK_FEATURE_PRESENT to check HLE [BZ #27398]
HLE is disabled on blacklisted CPUs.  Use CHECK_FEATURE_PRESENT, instead
of CHECK_FEATURE_ACTIVE, to check HLE.
2022-01-26 21:08:05 -08:00
Adhemerval Zanella
604814121d hurd: Add posix_spawnattr_tc{get,set}pgrp_np on libc.abilist
Commit 342cc934a3 missed the update-abi for the ABI.
2022-01-26 16:22:54 -03:00
Adhemerval Zanella
342cc934a3 posix: Add terminal control setting support for posix_spawn
Currently there is no proper way to set the controlling terminal through
posix_spawn in race free manner [1].  This forces shell implementations
to keep using fork+exec when launching background process groups,
even when using posix_spawn yields better performance.

This patch adds a new GNU extension so the creating process can
configure the created process terminal group.  This is done with a new
flag, POSIX_SPAWN_TCSETPGROUP, along with two new attribute functions:
posix_spawnattr_tcsetpgrp_np, and posix_spawnattr_tcgetpgrp_np.
The function sets a new attribute, spawn-tcgroupfd, that references to
the controlling terminal.

The controlling terminal is set after the spawn-pgroup attribute, and
uses the spawn-tcgroupfd along with current creating process group
(so it is composable with POSIX_SPAWN_SETPGROUP).

To create a process and set the controlling terminal, one can use the
following sequence:

    posix_spawnattr_t attr;
    posix_spawnattr_init (&attr);
    posix_spawnattr_setflags (&attr, POSIX_SPAWN_TCSETPGROUP);
    posix_spawnattr_tcsetpgrp_np (&attr, tcfd);

If the idea is also to create a new process groups:

    posix_spawnattr_t attr;
    posix_spawnattr_init (&attr);
    posix_spawnattr_setflags (&attr, POSIX_SPAWN_TCSETPGROUP
				     | POSIX_SPAWN_SETPGROUP);
    posix_spawnattr_tcsetpgrp_np (&attr, tcfd);
    posix_spawnattr_setpgroup (&attr, 0);

The controlling terminal file descriptor is ignored if the new flag is
not set.

This interface is slight different than the one provided by QNX [2],
which only provides the POSIX_SPAWN_TCSETPGROUP flag.  The QNX
documentation does not specify how the controlling terminal is obtained
nor how it iteracts with POSIX_SPAWN_SETPGROUP.  Since a glibc
implementation is library based, it is more straightforward and avoid
requires additional file descriptor operations to request the caller
to setup the controlling terminal file descriptor (and it also allows
a bit less error handling by posix_spawn).

Checked on x86_64-linux-gnu and i686-linux-gnu.

[1] https://github.com/ksh93/ksh/issues/79
[2] https://www.qnx.com/developers/docs/7.0.0/index.html#com.qnx.doc.neutrino.lib_ref/topic/p/posix_spawn.html

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-01-25 14:07:53 -03:00
Florian Weimer
5b8e7980c5 Linux: Detect user namespace support in io/tst-getcwd-smallbuff
Otherwise the test fails with certain container runtimes.

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
2022-01-24 18:14:24 +01:00
Siddhesh Poyarekar
23e0e8f5f1 getcwd: Set errno to ERANGE for size == 1 (CVE-2021-3999)
No valid path returned by getcwd would fit into 1 byte, so reject the
size early and return NULL with errno set to ERANGE.  This change is
prompted by CVE-2021-3999, which describes a single byte buffer
underflow and overflow when all of the following conditions are met:

- The buffer size (i.e. the second argument of getcwd) is 1 byte
- The current working directory is too long
- '/' is also mounted on the current working directory

Sequence of events:

- In sysdeps/unix/sysv/linux/getcwd.c, the syscall returns ENAMETOOLONG
  because the linux kernel checks for name length before it checks
  buffer size

- The code falls back to the generic getcwd in sysdeps/posix

- In the generic func, the buf[0] is set to '\0' on line 250

- this while loop on line 262 is bypassed:

    while (!(thisdev == rootdev && thisino == rootino))

  since the rootfs (/) is bind mounted onto the directory and the flow
  goes on to line 449, where it puts a '/' in the byte before the
  buffer.

- Finally on line 458, it moves 2 bytes (the underflowed byte and the
  '\0') to the buf[0] and buf[1], resulting in a 1 byte buffer overflow.

- buf is returned on line 469 and errno is not set.

This resolves BZ #28769.

Reviewed-by: Andreas Schwab <schwab@linux-m68k.org>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
Signed-off-by: Qualys Security Advisory <qsa@qualys.com>
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
2022-01-24 11:00:17 +05:30
Samuel Thibault
8c86ba4463 htl: Fix cleaning the reply port
If any RPC fails, the reply port will already be deallocated.
__pthread_thread_terminate thus has to defer taking its name until the very last
__thread_terminate_release which doesn't reply a message.  But then we
have to read from the pthread structure.

This introduces __pthread_dealloc_finish() which does the recording of
the thread termination, so the slot can be reused really only just before
the __thread_terminate_release call. Only the real thread can set it, so
let's decouple this from the pthread_state by just removing the
PTHREAD_TERMINATED state and add a terminated field.
2022-01-22 02:17:19 +01:00
Florian Weimer
f44820821a mips: Move DT_MIPS into <ldsodefs.h>
ELF_MACHINE_XHASH_SETUP in that file needs it.

Fixes commit c90363403b
("elf: Move _dl_setup_hash to its own file").
2022-01-19 20:11:55 +01:00
H.J. Lu
1e000d3d33 x86: Black list more Intel CPUs for TSX [BZ #27398]
Disable TSX and enable RTM_ALWAYS_ABORT for Intel CPUs listed in:

https://www.intel.com/content/www/us/en/support/articles/000059422/processors.html

This fixes BZ #27398.

Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
2022-01-18 14:20:09 -08:00
Samuel Thibault
f8b765bec4 htl: Fix build error in annexc
We were getting

../scripts/evaluate-test.sh posix/annexc $? true false > /usr/src/glibc-upstream/build/posix/annexc.test-result
In file included from ../include/pthread.h:1,
                 from <stdin>:1:
../sysdeps/htl/include/pthread.h:7:62: error: missing binary operator before token "("
    7 | # if defined __USE_EXTERN_INLINES && defined _LIBC && !IS_IN (libsupport)
      |                                                              ^
2022-01-17 23:18:27 +00:00
Aurelien Jarno
c242fcce06 x86: use default cache size if it cannot be determined [BZ #28784]
In some cases (e.g QEMU, non-Intel/AMD CPU) the cache information can
not be retrieved and the corresponding values are set to 0.

Commit 2d651eb926 ("x86: Move x86 processor cache info to
cpu_features") changed the behaviour in such case by defining the
__x86_shared_cache_size and __x86_data_cache_size variables to 0 instead
of using the default values. This cause an issue with the i686 SSE2
optimized bzero/routine which assumes that the cache size is at least
128 bytes, and otherwise tries to zero/set the whole address space minus
128 bytes.

Fix that by restoring the original code to only update
__x86_shared_cache_size and __x86_data_cache_size variables if the
corresponding cache sizes are not zero.

Fixes bug 28784
Fixes commit 2d651eb926

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2022-01-17 19:42:46 +01:00
Adhemerval Zanella
5f3a7ebc35 Linux: Add epoll_pwait2 (BZ #27359)
It is similar to epoll_wait, with the difference the timeout has
nanosecond resoluting by using struct timespec instead of int.

Although Linux interface only provides 64 bit time_t support, old
32 bit interface is also provided (so keep in sync with current
practice and to no force opt-in on 64 bit time_t).

Checked on x86_64-linux-gnu and i686-linux-gnu.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-01-17 14:34:54 -03:00
Adhemerval Zanella
9fe6f63638 elf: Fix 64 time_t support for installed statically binaries
The usage of internal static symbol for statically linked binaries
does not work correctly for objects built with -D_TIME_BITS=64,
since the internal definition does not provide the expected aliases.

This patch makes it to use the default stat functions instead (which
uses the default 64 time_t alias and types).

Checked on i686-linux-gnu.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-01-17 10:57:09 -03:00
Adhemerval Zanella
cedd498dbc Revert "elf: Fix 64 time_t support for installed statically binaries"
This reverts commit 0b8e83eb14.
2022-01-17 10:56:58 -03:00