Commit Graph

6340 Commits

Author SHA1 Message Date
Adhemerval Zanella a7bf5f4e69 Linux: Assume and consolidate getsockname wire-up syscall
And disable if kernel does not support it.

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>
2023-02-20 10:20:37 -03:00
Adhemerval Zanella 6008978f06 Linux: Move wordsize-32 Version to default
And remove redundant entries on other architectures Version.  The
version for fallocate64 was supposed to be 2.10, but it was then
added to 32-bit platforms in 2.11 because it mistakenly wasn't
exported for them in  2.10 (see the commit message for
1f3615a1c9).

The linux/generic did not exist before 2.15, i.e. when the tile
ports were added (and microblaze did not exist before 2.18), which
explains those differences but also illustrates that "2.11 for 32-bit,
2.10 for 64-bit" should be sufficient since versions older than the
minimum for the architecture are automatically adjusted.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2023-02-20 10:19:25 -03:00
Qihao Chencao cc4d6614b5 Use uintptr_t instead of performing pointer subtraction with a null pointer
Signed-off-by: Qihao Chencao <twose@qq.com>

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2023-02-17 17:07:44 -03:00
Pavel Kozlov 87abcf9a6e ARC: align child stack in clone
The ARCv2 ABI requires 4 byte stack pointer alignment. Don't allow to
use unaligned child stack in clone. As the stack grows down,
align it down.

This was pointed by misc/tst-misalign-clone-internal and
misc/tst-misalign-clone tests. Stack alignmet fixes these tests
fails.
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2023-02-17 16:12:52 -03:00
Joseph Myers 64924422a9 C2x strtol binary constant handling
C2x adds binary integer constants starting with 0b or 0B, and supports
those constants in strtol-family functions when the base passed is 0
or 2.  Implement that strtol support for glibc.

As discussed at
<https://sourceware.org/pipermail/libc-alpha/2020-December/120414.html>,
this is incompatible with previous C standard versions, in that such
an input string starting with 0b or 0B was previously required to be
parsed as 0 (with the rest of the string unprocessed).  Thus, as
proposed there, this patch adds 20 new __isoc23_* functions with
appropriate header redirection support.  This patch does *not* do
anything about scanf %i (which will need 12 new functions per long
double variant, so 12, 24 or 36 depending on the glibc configuration),
instead leaving that for a future patch.  The function names would
remain as __isoc23_* even if C2x ends up published in 2024 rather than
2023.

Making this change leads to the question of what should happen to
internal uses of these functions in glibc and its tests.  The header
redirection (which applies for _GNU_SOURCE or any other feature test
macros enabling C2x features) has the effect of redirecting internal
uses but without those uses then ending up at a hidden alias (see the
comment in include/stdio.h about interaction with libc_hidden_proto).
It seems desirable for the default for internal uses to be the same
versions used by normal code using _GNU_SOURCE, so rather than doing
anything to disable that redirection, similar macro definitions to
those in include/stdio.h are added to the include/ headers for the new
functions.

Given that the default for uses in glibc is for the redirections to
apply, the next question is whether the C2x semantics are correct for
all those uses.  Uses with the base fixed to 10, 16 or any other value
other than 0 or 2 can be ignored.  I think this leaves the following
internal uses to consider (an important consideration for review of
this patch will be both whether this list is complete and whether my
conclusions on all entries in it are correct):

benchtests/bench-malloc-simple.c
benchtests/bench-string.h
elf/sotruss-lib.c
math/libm-test-support.c
nptl/perf.c
nscd/nscd_conf.c
nss/nss_files/files-parse.c
posix/tst-fnmatch.c
posix/wordexp.c
resolv/inet_addr.c
rt/tst-mqueue7.c
soft-fp/testit.c
stdlib/fmtmsg.c
support/support_test_main.c
support/test-container.c
sysdeps/pthread/tst-mutex10.c

I think all of these places are OK with the new semantics, except for
resolv/inet_addr.c, where the POSIX semantics of inet_addr do not
allow for binary constants; thus, I changed that file (to use
__strtoul_internal, whose semantics are unchanged) and added a test
for this case.  In the case of posix/wordexp.c I think accepting
binary constants is OK since POSIX explicitly allows additional forms
of shell arithmetic expressions, and in stdlib/fmtmsg.c SEV_LEVEL is
not in POSIX so again I think accepting binary constants is OK.

Functions such as __strtol_internal, which are only exported for
compatibility with old binaries from when those were used in inline
functions in headers, have unchanged semantics; the __*_l_internal
versions (purely internal to libc and not exported) have a new
argument to specify whether to accept binary constants.

As well as for the standard functions, the header redirection also
applies to the *_l versions (GNU extensions), and to legacy functions
such as strtoq, to avoid confusing inconsistency (the *q functions
redirect to __isoc23_*ll rather than needing their own __isoc23_*
entry points).  For the functions that are only declared with
_GNU_SOURCE, this means the old versions are no longer available for
normal user programs at all.  An internal __GLIBC_USE_C2X_STRTOL macro
is used to control the redirections in the headers, and cases in glibc
that wish to avoid the redirections - the function implementations
themselves and the tests of the old versions of the GNU functions -
then undefine and redefine that macro to allow the old versions to be
accessed.  (There would of course be greater complexity should we wish
to make any of the old versions into compat symbols / avoid them being
defined at all for new glibc ABIs.)

strtol_l.c has some similarity to strtol.c in gnulib, but has already
diverged some way (and isn't listed at all at
https://sourceware.org/glibc/wiki/SharedSourceFiles unlike strtoll.c
and strtoul.c); I haven't made any attempts at gnulib compatibility in
the changes to that file.

I note incidentally that inttypes.h and wchar.h are missing the
__nonnull present on declarations of this family of functions in
stdlib.h; I didn't make any changes in that regard for the new
declarations added.
2023-02-16 23:02:40 +00:00
Adhemerval Zanella Netto 16e424a325 powerpc64: Add the clone3 wrapper
It follows the internal signature:

  extern int clone3 (struct clone_args *__cl_args, size_t __size,
 int (*__func) (void *__arg), void *__arg);

The powerpc64 ABI requires an initial stackframe so the child can
store/restore the TOC.  It is create prior calling clone3 by
adjusting the stack size (since kernel will compute the stack as
stack plus size).

Checked on powerpc64-linux-gnu (power8, kernel 6.0) and
powerpc64le-linux-gnu (power9, kernel 4.18).
Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>
2023-02-09 07:49:25 -03:00
quxm ec6d2b83f2 C-SKY: Strip hard float abi from hard float feature.
The hard float abi and hard float are different,
  Hard float abi: Use float register to pass float type arguments.
  Hard float: Enable the hard float ISA feature.
So the with_fp_cond cannot represent these two features. When
-mfloat-abi=softfp, the float abi is soft and hard float is enabled.
So add 'with_hard_float_abi' in preconfigure and define 'CSKY_HARD_FLOAT_ABI'
if float abi is hard, and use 'CSKY_HARD_FLOAT_ABI' to determine
dynamic linker because it is what determines compatibility.
And with_fp_cond is still needed to tell glibc whether to enable
hard floating feature.
In addition, use AC_TRY_COMMAND to test gcc to ensure compatibility
between different versions of gcc. The original way has a problem
that __CSKY_HARD_FLOAT_FPU_SF__ means the target only has single
hard float-points ISA, so it's not defined in CPUs like ck810f.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2023-02-07 16:34:24 +08:00
Stefan Liebler 41f67ccbe9 S390: Influence hwcaps/stfle via GLIBC_TUNABLES.
This patch enables the option to influence hwcaps and stfle bits used
by the s390 specific ifunc-resolvers.  The currently x86-specific
tunable glibc.cpu.hwcaps is also used on s390x to achieve the task. In
addition the user can also set a CPU arch-level like z13 instead of
single HWCAP and STFLE features.

Note that the tunable only handles the features which are really used
in the IFUNC-resolvers.  All others are ignored as the values are only
used inside glibc.  Thus we can influence:
- HWCAP_S390_VXRS (z13)
- HWCAP_S390_VXRS_EXT (z14)
- HWCAP_S390_VXRS_EXT2 (z15)
- STFLE_MIE3 (z15)

The influenced hwcap/stfle-bits are stored in the s390-specific
cpu_features struct which also contains reserved fields for future
usage.

The ifunc-resolvers and users of stfle bits are adjusted to use the
information from cpu_features struct.

On 31bit, the ELF_MACHINE_IRELATIVE macro is now also defined.
Otherwise the new ifunc-resolvers segfaults as they depend on
the not yet processed_rtld_global_ro@GLIBC_PRIVATE relocation.
2023-02-07 09:19:27 +01:00
Adhemerval Zanella Netto 98f9435f33 Linux: optimize clone3 internal usage
Add an optimization to avoid calling clone3 when glibc detects that
there is no kernel support.  It also adds __ASSUME_CLONE3, which allows
skipping this optimization and issuing the clone3 syscall directly.

It does not handle the the small window between 5.3 and 5.5 for
posix_spawn (CLONE_CLEAR_SIGHAND was added in 5.5).

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2023-02-01 08:42:11 -03:00
Adhemerval Zanella Netto 1e442efd57 aarch64: Add the clone3 wrapper
It follow the internal signature:

  extern int clone3 (struct clone_args *__cl_args, size_t __size,
 int (*__func) (void *__arg), void *__arg);

Checked on aarch64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2023-02-01 08:42:11 -03:00
Adhemerval Zanella Netto 2053c11331 linux: Add clone3 CLONE_CLEAR_SIGHAND optimization to posix_spawn
The clone3 flag resets all signal handlers of the child not set to
SIG_IGN to SIG_DFL.  It allows to skip most of the sigaction calls
to setup child signal handling, where previously a posix_spawn
had to issue 2 times NSIG sigaction calls (one to obtain the current
disposition and another to set either SIG_DFL or SIG_IGN).

With POSIX_SPAWN_SETSIGDEF the child will setup the signal for the case
where the disposition is SIG_IGN.

The code must handle the fallback where clone3 is not available. This is
done by splitting __clone_internal_fallback from __clone_internal.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2023-02-01 08:42:11 -03:00
Adhemerval Zanella Netto 2290cf73cc Linux: Do not align the stack for __clone3
All internal callers of __clone3 should provide an already aligned
stack.  Removing the stack alignment in __clone3 is a net gain: it
simplifies the internal function contract (mask/unmask signals) along
with the arch-specific code.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2023-02-01 08:42:11 -03:00
Adhemerval Zanella Netto 2fe58919a0 linux: Extend internal clone3 documentation
Different than kernel, clone3 returns EINVAL for NULL struct
clone_args or function pointer.  This is similar to clone
interface that return EINVAL for NULL function argument.

It also clean up the Linux clone3.h interface, since it not
currently exported.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2023-02-01 08:42:11 -03:00
Adhemerval Zanella Netto ff9ffc805f linux: Do not reset signal handler in posix_spawn if it is already SIG_DFL
There is no need to issue another sigaction if the disposition is
already SIG_DFL.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2023-02-01 08:42:11 -03:00
Joseph Myers 57f4a850c8 Add HWCAP2_SVE_EBF16 from Linux 6.1 to AArch64 bits/hwcap.h
Linux 6.1 adds a new AArch64 HWCAP2 value HWCAP2_SVE_EBF16; add it to
the corresponding bits/hwcap.h.

Tested with build-many-glibcs.py for aarch64.
2023-01-10 15:51:58 +00:00
Joseph Myers 6d7e8eda9b Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
Florian Weimer 3c66c9600e Linux: Pass size argument of epoll_create to the kernel
The kernel actually verifies it, and a garbage value in the register
causes improper system call failures.

Fixes commit c1c0dea388 ("Linux: Remove epoll_create,
inotify_init from syscalls.list") and commit d1d23b1342
("Lninux: consolidate epoll_create implementation").

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2022-12-22 17:23:23 +01:00
Joseph Myers 81a94a2ae3 Define MADV_COLLAPSE from Linux 6.1
Add the MADV_COLLAPSE constant from Linux 6.1 to bits/mman-linux.h and
the hppa bits/mman.h.

Tested for x86_64.
2022-12-22 15:12:52 +00:00
Rajalakshmi Srinivasaraghavan e2b68828fa powerpc64: Increase SIGSTKSZ and MINSIGSTKSZ
This patch increases the value of SIGSTKSZ and MINSIGSTKSZ
for powerpc64 similar to the kernel commit
2f82ec19757f58549467db568c56e7dfff8af283 to allow
further expansion of the signal stack frame size.
2022-12-21 17:48:35 -06:00
Joseph Myers 258d554a9c Update kernel version to 6.1 in header constant tests
This patch updates the kernel version in the tests tst-mman-consts.py,
tst-mount-consts.py and tst-pidfd-consts.py to 6.1.  (There are no new
constants covered by these tests in 6.1 that need any other header
changes.)

Tested with build-many-glibcs.py.
2022-12-21 15:49:37 +00:00
Joseph Myers 5ab9b2c924 Update syscall lists for Linux 6.1
Linux 6.1 has no new syscalls.  Update the version number in
syscall-names.list to reflect that it is still current for 6.1.
2022-12-20 15:24:29 +00:00
Florian Weimer c1c0dea388 Linux: Remove epoll_create, inotify_init from syscalls.list
Their presence causes stub warnings to be created on architectures
which do not implement them.

Fixes commit d1d23b1342 ("Lninux: consolidate
epoll_create implementation") and commit 842128f160
("Linux: consolidate inotify_init implementation").

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-12-19 13:28:14 +01:00
Florian Weimer 9a5b1d84fb Linux: Reflow and sort some Makefile variables
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-12-19 13:28:07 +01:00
Joseph Myers 6fd504849d Allow _Qp_fgt in sparc64 localplt.data
A recent GCC change resulted in localplt test failures on sparc64
because of references to _Qp_fgt.  This is analogous to all the other
floating-point symbols allowed in localplt.data, so it seems
appropriate to allow this one as well.

Tested with build-many-glibcs.py for sparc64-linux-gnu (GCC mainline),
where it fixes the test failure.
2022-12-13 22:16:22 +00:00
Adhemerval Zanella Netto 929ea132b4 Linux: Consolidate typesizes.h
The generic (sysdeps/unix/sysv/linux/generic/bits/typesizes.h) and
default (bits/typesizes.h) differs in two fields:

                    bits/typesizes.h    Linux generic
__NLINK_T_TYPE      __UWORD_TYPE        __U32_TYPE
__BLKSIZE_T_TYPE    __SLONGWORD_TYPE    __S32_TYPE

Sinceit leads to different C++ mangling names, the default typesize.h
is copied for the requires archtiectures and the generic is make the
default Linux one.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 14:41:21 -03:00
Adhemerval Zanella Netto 9d53dc48e8 Linux: Make generic fcntl.h the default one
It is currently used for csky, arc, nios2, and or1k.  Newer 64 bit
architecture, like riscv32 and loongarch, reimplement it to override
F_GETLK64/F_SETLK64/F_SETLKW64.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 14:40:52 -03:00
Adhemerval Zanella Netto fea7abbc23 Linux: make generic xstatver.h the default one
And copy the current default one to required ABIs.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 14:40:36 -03:00
Adhemerval Zanella Netto 71e4344f25 Linux: Remove generic sysdep
The includes chain is added on each architecture sysdep.h and
the __NR__llseek hack is moved to lseek.c and lseek64.c.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 14:33:47 -03:00
Adhemerval Zanella Netto 127945c561 Linux: Assume and consolidate shutdown wire-up syscall
And disable if kernel does not support it.

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>
2022-12-07 14:17:28 -03:00
Adhemerval Zanella Netto 377a14a22a Linux: Assume and consolidate listen wire-up syscall
And disable if kernel does not support it.

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>
2022-12-07 14:11:53 -03:00
Adhemerval Zanella Netto d00783653a Linux: Assume and consolidate socketpair wire-up syscall
And disable if kernel does not support it.

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>
2022-12-07 14:11:49 -03:00
Adhemerval Zanella Netto 1fed1a5af4 Linux: Assume and consolidate socket wire-up syscall
And disable if kernel does not support it.

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>
2022-12-07 14:11:36 -03:00
Adhemerval Zanella Netto 215bf99347 Linux: Assume and consolidate bind wire-up syscall
And disable if kernel does not support it.

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>
2022-12-07 13:42:05 -03:00
Adhemerval Zanella Netto a33919698b Linux: consolidate ____longjmp_chk
Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:52:23 -03:00
Adhemerval Zanella Netto 04e7e2658c Linux: consolidate sendfile implementation
This is similar to other LFS consolidation, where the non-LFS is only
built if __OFF_T_MATCHES_OFF64_T is not defined and the LFS version
is aliased to non-LFS name if __OFF_T_MATCHES_OFF64_T is defined.

For non-LFS variant, use sendfile syscall if defined, otherwise use
sendfile64 plus the offset overflow check (as generic implementation).

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto 9cffb295e3 Linux: consolidate unlink implementation
Use unlink syscall if defined, otherwise use unlinkat.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto bf58f34a70 Linux: consolidate symlink implementation
Use symlink syscall if defined, otherwise use symlinkat.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto 54ed77914a Linux: consolidate rmdir implementation
Use rmdir syscall if defined, otherwise use unlinkat.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto 2fc81f6ca5 Linux: consolidate readlink implementation
Use readlink syscall if defined, otherwise readlinkat.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto ccb9215dbe Linux: consolidate mkdir implementation
Use mkdir syscall if defined, otherwise use mkdirat.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto f178e5173f Linux: consolidate link implementation
Use link syscall if defined, otherwise use linkat.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto 25ca6175ba Linux: consolidate lchown implementation
Use lchown syscall if defined, otherwise use fchownat.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto 842128f160 Linux: consolidate inotify_init implementation
Use inotify_init syscall if defined, otherwise use inotify_init1.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto d1d23b1342 Lninux: consolidate epoll_create implementation
Use epoll_create syscall if defined, otherwise use epoll_create1.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto 33ef940302 Linux: consolidate dup2 implementation
Use dup2 syscall if defined, otherwise use dup3.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto 1001abfa14 Linux: consolidate chown implementation
Use chown syscall if defined, otherwise use fchownat.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto f0fa84d31f Linux: consolidate chmod implementation
Use chmod syscall if defined, otherwise use fchmodat.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2022-12-07 11:27:01 -03:00
Adhemerval Zanella Netto b14e1f9fcd linux: Consolidate dl-origin.c
Use the generic implementation as the default, since the syscall
is supported by all architectures.

Also cleanup some headers and remove the INTERNAL_SYSCALL_ERROR_P
usage (the INTERNAL_SYSCALL_CALL macro already returns an negative
value if an error occurs).
2022-12-07 11:27:01 -03:00
Xing Li 36d423e203 linux: Use long int for syscall return value
The linux syscall ABI returns long, so the generic syscall code for
linux should use long for the return value.

This fixes the truncation of the return value of the syscall function
when that does not fit into an int.
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-12-07 10:37:06 -03:00
Adhemerval Zanella 6cfc50f40a configure: Remove check if ld is GNU
Assume linker has gnu argument input style.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2022-12-06 09:40:19 -03:00
YunQiang Su a9acb7b39e Define in_int32_t_range to check if the 64 bit time_t syscall should be used
Currently glibc uses in_time_t_range to detects time_t overflow,
and if it occurs fallbacks to 64 bit syscall version.

The function name is confusing because internally time_t might be
either 32 bits or 64 bits (depending on __TIMESIZE).

This patch refactors the in_time_t_range by replacing it with
in_int32_t_range for the case to check if the 64 bit time_t syscall
should be used.

The in_time_t range is used to detect overflow of the
syscall return value.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-11-17 14:35:13 -03:00
Florian Weimer 22a46dee24 Linux: Support __IPC_64 in sysvctl *ctl command arguments (bug 29771)
Old applications pass __IPC_64 as part of the command argument because
old glibc did not check for unknown commands, and passed through the
arguments directly to the kernel, without adding __IPC_64.
Applications need to continue doing that for old glibc compatibility,
so this commit enables this approach in current glibc.

For msgctl and shmctl, if no translation is required, make
direct system calls, as we did before the time64 changes.  If
translation is required, mask __IPC_64 from the command argument.

For semctl, the union-in-vararg argument handling means that
translation is needed on all architectures.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-11-10 14:21:34 +01:00
Zong Li 38caf7a1cc riscv: Get level 3 cache's information
RISC-V architecture extends the cache information for level 3 cache
in AUX vector in Linux v.6.1-rc1. This patch supports sysconf to get
the level 3 cache information.

Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-11-09 11:40:59 -03:00
Adhemerval Zanella 2e274cd8c1 Linux: Add ppoll fortify symbol for 64 bit time_t (BZ# 29746)
Similar to ppoll, the poll.h header needs to redirect the poll call
to a proper fortified ppoll with 64 bit time_t support.

The implementation is straightforward, just need to add a similar
check as __poll_chk and call the 64 bit time_t ppoll version.  The
debug fortify tests are also extended to cover 64 bit time_t for
affected ABIs.

Unfortunately it requires an aditional symbol, which makes backport
tricky.  One possibility is to add a static inline version if compiler
supports is and call abort instead of __chk_fail, so fortified version
will call __poll64 in the end.

Another possibility is to just remove the fortify support for
_TIME_BITS=64.

Checked on i686-linux-gnu.
2022-11-08 13:37:06 -03:00
Florian Weimer 1f34a23288 elf: Introduce <dl-call_tls_init_tp.h> and call_tls_init_tp (bug 29249)
This makes it more likely that the compiler can compute the strlen
argument in _startup_fatal at compile time, which is required to
avoid a dependency on strlen this early during process startup.

Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
2022-11-03 17:28:03 +01:00
Florian Weimer ee1ada1bdb elf: Rework exception handling in the dynamic loader [BZ #25486]
The old exception handling implementation used function interposition
to replace the dynamic loader implementation (no TLS support) with the
libc implementation (TLS support).  This results in problems if the
link order between the dynamic loader and libc is reversed (bug 25486).

The new implementation moves the entire implementation of the
exception handling functions back into the dynamic loader, using
THREAD_GETMEM and THREAD_SETMEM for thread-local data support.
These depends on Hurd support for these macros, added in commit
b65a82e4e7 ("hurd: Add THREAD_GET/SETMEM/_NC").

One small obstacle is that the exception handling facilities are used
before the TCB has been set up, so a check is needed if the TCB is
available.  If not, a regular global variable is used to store the
exception handling information.

Also rename dl-error.c to dl-catch.c, to avoid confusion with the
dlerror function.

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
2022-11-03 09:39:31 +01:00
Aurelien Jarno f4ce325dfc linux: Drop useless include from fstatat.c
It is a left-over from previous refactorings.

Reviewed by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-11-02 19:10:22 +01:00
Aurelien Jarno 7457b7eef8 linux: Fix fstatat on MIPSn64 (BZ #29730)
Commit 6e8a0aac2f ("time: Fix overflow itimer tests on 32-bit
systems") changed in_time_t_range to assume a 32-bit time_t. This broke
fstatat on MIPSn64 that was using it with a 64-bit time_t due to
difference between stat and stat64. This commit fix that by adding a
MIPSn64 specific version, which bypasses the EOVERFLOW tests.

Resolves: BZ #29730

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-11-02 16:35:05 +01:00
Adhemerval Zanella d227fd53cb Apply asm redirection in not-cancel before first use
It is avoid a build failure on clang where it can not redeclare function
attribute after its first use.

Reviewed-by: Fangrui Song <maskray@google.com>
2022-11-01 09:45:14 -03:00
Szabolcs Nagy 09c6c6073c aarch64: Fix the extension header write in getcontext and swapcontext
The extension header is two 32bit words and in the last header both
should be 0. There is plenty space in the __reserved area, but it's
better not to write more than we mean to.
2022-10-28 11:14:54 +01:00
Adhemerval Zanella 7a6ca82f80 linux: Fix generic struct_stat for 64 bit time (BZ# 29657)
The generic Linux struct_stat misses the conditionals to use
bits/struct_stat_time64_helper.h in the __USE_TIME_BITS64 for
architecture that uses __TIMESIZE == 32 (currently csky and nios2).

Since newer ports should not support 32 bit time_t, the generic
implementation should be used as default.

For arm, hppa, and sh a copy of default struct_stat is added,
while for csky and nios a new one based on generic is used, along
with conditionals to use bits/struct_stat_time64_helper.h.

The default struct_stat is also replaced with the generic one.

Checked on aarch64-linux-gnu and arm-linux-gnueabihf.
2022-10-25 15:53:19 -03:00
Joseph Myers b87a70e5e2 Add ADDRB from Linux 6.0 to bits/termios-c_cflag.h
Linux 6.0 adds a constant ADDRB, a termios c_cflag bit, to its
include/uapi/asm-generic/termbits-common.h.

Add it accordingly to glibc's bits/termios-c_cflag.h headers.  As
other constants in these headers are generally in octal, I converted
the value to octal to match.  As ADDRB isn't in a POSIX-reserved
namespace, I made it conditional on __USE_MISC.

Tested for x86_64.
2022-10-24 13:43:19 +00:00
Adhemerval Zanella 9b5e138f2b linux: Avoid shifting a negative signed on POSIX timer interface
The current macros uses pid as signed value, which triggers a compiler
warning for process and thread timers.  Replace MAKE_PROCESS_CPUCLOCK
with static inline function that expects the pid as unsigned.  These
are similar to what Linux does internally.

Checked on x86_64-linux-gnu.
Reviewed-by: Arjun Shankar <arjun@redhat.com>
2022-10-20 10:19:08 -03:00
Florian Weimer 88f4b6929c Introduce <pointer_guard.h>, extracted from <sysdep.h>
This allows us to define a generic no-op version of PTR_MANGLE and
PTR_DEMANGLE.  In the future, we can use PTR_MANGLE and PTR_DEMANGLE
unconditionally in C sources, avoiding an unintended loss of hardening
due to missing include files or unlucky header inclusion ordering.

In i386 and x86_64, we can avoid a <tls.h> dependency in the C
code by using the computed constant from <tcb-offsets.h>.  <sysdep.h>
no longer includes these definitions, so there is no cyclic dependency
anymore when computing the <tcb-offsets.h> constants.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-10-18 17:03:55 +02:00
Joseph Myers 3bd18aa4d1 Add AArch64 HWCAP2_EBF16 from Linux 6.0 to bits/hwcap.h
Linux 6.0 adds a new AArch64 HWCAP2 bit, HWCAP2_EBF16.  Add this to
glibc's bits/hwcap.h.

Tested with build-many-glibcs.py for aarch64-linux-gnu.
2022-10-12 14:28:14 +00:00
Andreas Schwab 954b8f3895 Expose all MAP_ constants in <sys/mman.h> unconditionally (bug 29375)
POSIX reserves the MAP_ prefix for <sys/mman.h>, so there is no need to
conditionalize their definitions on feature test macros.
2022-10-10 09:30:24 +02:00
Javier Pello ab40f20364 elf: Remove _dl_string_hwcap
Removal of legacy hwcaps support from the dynamic loader left
no users of _dl_string_hwcap.

Signed-off-by: Javier Pello <devel@otheo.eu>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-10-06 07:59:48 -03:00
Joseph Myers 27d67e974e Update kernel version to 6.0 in header constant tests
This patch updates the kernel version in the tests tst-mman-consts.py,
tst-mount-consts.py and tst-pidfd-consts.py to 6.0.  (There are no new
constants covered by these tests in 6.0 that need any other header
changes.)

Tested with build-many-glibcs.py.
2022-10-05 22:11:27 +00:00
Joseph Myers 919b9bfaa9 Update syscall lists for Linux 6.0
Linux 6.0 has no new syscalls.  Update the version number in
syscall-names.list to reflect that it is still current for 6.0.

Tested with build-many-glibcs.py.
2022-10-05 14:33:14 +00:00
Adhemerval Zanella 609c9d0951 malloc: Do not clobber errno on __getrandom_nocancel (BZ #29624)
Use INTERNAL_SYSCALL_CALL instead of INLINE_SYSCALL_CALL.  This
requires emulate the semantic for hurd call (so __arc4random_buf
uses the fallback).

Checked on x86_64-linux-gnu.

Reviewed-by: Wilco Dijkstra  <Wilco.Dijkstra@arm.com>
2022-09-30 15:25:15 -03:00
Adhemerval Zanella 13db9ee2cb stdlib: Fix __getrandom_nocancel type and arc4random usage (BZ #29638)
Using an unsigned type prevents the fallback to be used if kernel
does not support getrandom syscall.

Checked on x86_64-linux-gnu.

Reviewed-by: Wilco Dijkstra  <Wilco.Dijkstra@arm.com>
2022-09-30 15:24:49 -03:00
Wilco Dijkstra d1babeb32d Use C11 atomics instead of atomic_increment(_val)
Replace atomic_increment and atomic_increment_val with atomic_fetch_add_relaxed.
One case in sem_post.c uses release semantics (see comment above it).
The others are simple counters and do not protect any shared data from
concurrent accesses.

Passes regress on AArch64.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-09-23 15:59:56 +01:00
John David Anglin fa47e8e6df hppa: undef __ASSUME_SET_ROBUST_LIST
QEMU does not support support set_robust_list. Thus, we need
to enable detection of set_robust_list system call.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
2022-09-20 20:14:14 +00:00
Adhemerval Zanella 85a3228744 linux: Use same type for MMAP2_PAGE_UNIT
It avoid a possible compiler warning where right size of operator
is converted from a negative value to unsigned.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-09-20 10:57:40 -03:00
Adhemerval Zanella aeb4d2e981 m68k: Enforce 4-byte alignment on internal locks (BZ #29537)
A new internal definition, __LIBC_LOCK_ALIGNMENT, is used to force
the 4-byte alignment only for m68k, other architecture keep the
natural alignment of the type used internally (and hppa does not
require 16-byte alignment for kernel-assisted CAS).

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-09-20 10:56:54 -03:00
Florian Weimer 766b73768b Linux: Do not skip d_ino == 0 entries in readdir, readdir64 (bug 12165)
POSIX does not say this value is special.  For example, old XFS file
systems may still use inode number zero.

Also update the comment regarding ENOENT.  Linux may return ENOENT
for some file systems.
2022-09-19 12:04:57 +02:00
Łukasz Stelmach 22c96052ac RISC-V: Allow long jumps to __syscall_error
__syscall_error may end up farther than 1MiB away from a caller,
especially when linking statically large binaries. tail allows for
4GiB jumps and is reduced to j when a linked symbol is within range.

Fixes: 36960f0c76 ("RISC-V: Linux Syscall Interface")
Fixes: 7f33b09c65 ("RISC-V: Linux ABI")
Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
2022-09-16 23:25:45 -04:00
Wilco Dijkstra 53b251c9ff Use C11 atomics instead atomic_add(_zero)
Replace atomic_add and atomic_add_zero with atomic_fetch_add_relaxed.

Reviewed-by: DJ Delorie <dj@redhat.com>
2022-09-09 14:11:23 +01:00
caiyinyu 930993921f LoongArch: Add soft float support. 2022-09-01 09:10:08 +08:00
Stefan Liebler e57d8fc97b S390: Always use svc 0
On s390x syscalls are triggered by svc instruction. One can
pass the syscall number encoded in the instruction "svc 123"
or by storing it in r1:
lghi r1,123
svc 0

If the syscall number is encoded in the instruction, this can
cause broken syscall restarts.  Therefore this patch is now just
passing the syscall number in r1.

See also kernel-commit:
"s390/signal: switch to using vdso for sigreturn and syscall restart"
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch/s390/[%e2%80%a6]call.c?h=v6.0-rc1&id=df29a7440c4b5c65765c8f60396b3b13063e24e9

As information, the "svc 0" feature was introduced in kernel 2.5.62:
commit b5aad611393ef2e132e3648fa4c6e56a9cfa8708
2022-08-30 10:54:46 +02:00
caiyinyu fa9e095bbe LoongArch: Fix ptr mangling/demangling features. 2022-08-30 11:45:22 +08:00
Florian Weimer 5ecc982412 s390: Move hwcaps/platform names out of _rtld_global_ro
Changes to these arrays are often backported to stable releases,
but additions to these arrays shift the offsets of the following
_rltd_global_ro members, thus breaking the GLIBC_PRIVATE ABI.

Obviously, this change is itself an internal ABI break, but at least
it will avoid further ABI breaks going forward.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2022-08-25 21:33:12 +02:00
Joseph Myers 4c199499d6 Add AArch64 HWCAP2_* constants from Linux 5.19
Linux 5.19 adds more HWCAP2_* values for AArch64; add these to its
bits/hwcap.h header in glibc.

Tested with build-many-glibcs.py for aarch64-linux-gnu.
2022-08-22 14:59:39 +00:00
Joseph Myers a727220b37 Add AGROUP from Linux 5.19 to sys/acct.h, remove Alpha version (bug 29502)
Linux 5.19 adds a new accounting flag AGROUP; add it to the
enumeration in sys/acct.h.

This shows up that the Alpha-specific variant of this header has a
different set of constants and struct acct, which appear to be the
constants and structure layout from Linux 2.0.  These were changed
some time between Linux 2.0 and Linux 2.2; I see no evidence of an
Alpha-specific layout or set of constants, but haven't checked the
detailed Linux kernel history between those versions.  Rather, it
looks like tha Alpha-specific header was originally needed because of
the use of types in the kernel structure (such as uid_t and gid_t)
that had different sizes on Alpha, and when glibc was updated for
changes to the structure and constants in the kernel

1998-10-02  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

        * sysdeps/unix/sysv/linux/sys/acct.h: Bring in sync with current
        linux 2.1 version.

that simply omitted to do anything about the Alpha version.

Thus, remove the Alpha version in order to get the updated definitions
into use on Alpha, as I don't think the interfaces are actually
different for Alpha with any kernel version supported by glibc.

Tested for x86_64, and with build-many-glibcs.py for alpha-linux-gnu.
2022-08-22 14:16:57 +00:00
Florian Weimer e7ad26ee3c alpha: Fix generic brk system call emulation in __brk_call (bug 29490)
The kernel special-cases the zero argument for alpha brk, and we can
use that to restore the generic Linux error handling behavior.

Fixes commit b57ab258c1 ("Linux:
Introduce __brk_call for invoking the brk system call").
2022-08-22 11:05:42 +02:00
Florian Weimer 2955ef4b7c Linux: Fix enum fsconfig_command detection in <sys/mount.h>
The #ifdef FSOPEN_CLOEXEC check did not work because the macro
was always defined in this header prior to the check, so that
the <linux/mount.h> contents did not matter.

Fixes commit 774058d729
("linux: Fix sys/mount.h usage with kernel headers").
2022-08-16 12:03:28 +02:00
Samuel Thibault a2ee8c6500 Move ip_mreqn structure from Linux to generic
I.e. from sysdeps/unix/sysv/linux/bits/in.h to netinet/in.h

It is following both the BSD and Linux definitions.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-08-15 22:43:15 +02:00
Florian Weimer f82e05ebb2 Linux: Terminate subprocess on late failure in tst-pidfd (bug 29485)
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2022-08-15 16:43:59 +02:00
Adhemerval Zanella 774058d729 linux: Fix sys/mount.h usage with kernel headers
Now that kernel exports linux/mount.h and includes it on linux/fs.h,
its definitions might clash with glibc exports sys/mount.h.  To avoid
the need to rearrange the Linux header to be always after glibc one,
the glibc sys/mount.h is changed to:

  1. Undefine the macros also used as enum constants.  This covers prior
     inclusion of <linux/mount.h> (for instance MS_RDONLY).

  2. Include <linux/mount.h> based on the usual __has_include check
     (needs to use __has_include ("linux/mount.h") to paper over GCC
     bugs.

  3. Define enum fsconfig_command only if FSOPEN_CLOEXEC is not defined.
     (FSOPEN_CLOEXEC should be a very close proxy.)

  4. Define struct mount_attr if MOUNT_ATTR_SIZE_VER0 is not defined.
     (Added in the same commit on the Linux side.)

This patch also adds some tests to check if including linux/fs.h and
linux/mount.h after and before sys/mount.h does work.

Checked on x86_64-linux-gnu.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-08-12 09:15:28 -03:00
Adhemerval Zanella e1226cdc6b linux: Use compile_c_snippet to check linux/mount.h availability
Checked on x86_64-linux-gnu.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-08-12 09:15:23 -03:00
Adhemerval Zanella c68b6044bc linux: Mimic kernel defition for BLOCK_SIZE
To avoid possible warnings if the kernel header is included before
sys/mount.h.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-08-12 09:15:21 -03:00
Adhemerval Zanella 1542019b69 linux: Use compile_c_snippet to check linux/pidfd.h availability
Instead of tying to a specific kernel version.

Checked on x86_64-linux-gnu.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-08-12 09:15:11 -03:00
caiyinyu 1c9bc1b6e5 LoongArch: Add pointer mangling support. 2022-08-12 09:30:56 +08:00
Stefan Liebler 11f09947f3 tst-process_madvise: Check process_madvise-syscall support.
So far this test checks if pidfd_open-syscall is supported,
which was introduced with linux 5.3.

The process_madvise-syscall was introduced with linux 5.10.
Thus you'll get FAILs if you are running a kernel in between.

This patch adds a check if the first process_madvise-syscall
returns ENOSYS and in this case will fail with UNSUPPORTED.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-08-11 12:21:05 +02:00
Adhemerval Zanella 36676f5e5d Remove ldd libc4 support
The older libc versions are obsolete for over twenty years now.
2022-08-04 10:03:45 -03:00
Lucas A. M. Magalhaes 8ee878592c Assume only FLAG_ELF_LIBC6 suport
The older libc versions are obsolete for over twenty years now.
This patch removes the special flags for libc5 and libc4 and assumes
that all libraries cached are libc6 compatible and use FLAG_ELF_LIBC6.

Checked with a build for all affected architectures.

Co-authored-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-08-04 09:09:48 -03:00
Adhemerval Zanella 5a57ad23ba Remove left over LD_LIBRARY_VERSION usages
The environment variable was removed by
d2db60d8d8.
2022-08-04 09:09:48 -03:00
Florian Weimer 8fabe0e632 Linux: Remove exit system call from _exit
exit only terminates the current thread, not the whole process, so it
is the wrong fallback system call in this context.  All supported
Linux versions implement the exit_group system call anyway.
2022-08-04 06:17:50 +02:00
caiyinyu 3e83843637 LoongArch: Add vdso support for gettimeofday. 2022-08-04 09:19:36 +08:00
Joseph Myers 085030b957 Update kernel version to 5.19 in header constant tests
This patch updates the kernel version in the tests tst-mman-consts.py,
tst-mount-consts.py and tst-pidfd-consts.py to 5.18.  (There are no
new constants covered by these tests in 5.19, or in 5.17 or 5.18 in
the case of tst-mount-consts.py that previously used version 5.16,
that need any other header changes.)

Tested with build-many-glibcs.py.
2022-08-03 16:31:58 +00:00