2016-11-07 19:29:30 +00:00
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/* Old SysV permission definition for Linux. Default version.
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2021-01-02 19:32:25 +00:00
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Copyright (C) 1995-2021 Free Software Foundation, Inc.
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2000-01-24 12:38:46 +00:00
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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2001-07-06 04:58:11 +00:00
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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2000-01-24 12:38:46 +00:00
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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2001-07-06 04:58:11 +00:00
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Lesser General Public License for more details.
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2000-01-24 12:38:46 +00:00
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2001-07-06 04:58:11 +00:00
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You should have received a copy of the GNU Lesser General Public
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2012-02-09 23:18:22 +00:00
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License along with the GNU C Library; if not, see
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Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 05:40:42 +00:00
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<https://www.gnu.org/licenses/>. */
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2000-01-24 12:38:46 +00:00
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2016-11-07 19:29:30 +00:00
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#include <sys/ipc.h> /* For __key_t */
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2019-05-15 18:20:58 +00:00
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#include <kernel-features.h>
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2000-01-24 12:38:46 +00:00
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2019-05-15 18:20:58 +00:00
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#ifdef __ASSUME_SYSVIPC_DEFAULT_IPC_64
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# define __IPC_64 0x0
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#else
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# define __IPC_64 0x100
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#endif
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#ifndef __OLD_IPC_ID_TYPE
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# define __OLD_IPC_ID_TYPE unsigned short int
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#endif
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#ifndef __OLD_IPC_MODE_TYPE
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# define __OLD_IPC_MODE_TYPE unsigned short int
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#endif
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2000-01-24 12:38:46 +00:00
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struct __old_ipc_perm
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{
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__key_t __key; /* Key. */
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2019-05-15 18:20:58 +00:00
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__OLD_IPC_ID_TYPE uid; /* Owner's user ID. */
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__OLD_IPC_ID_TYPE gid; /* Owner's group ID. */
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__OLD_IPC_ID_TYPE cuid; /* Creator's user ID. */
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__OLD_IPC_ID_TYPE cgid; /* Creator's group ID. */
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__OLD_IPC_MODE_TYPE mode; /* Read/write permission. */
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2000-01-24 12:38:46 +00:00
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unsigned short int __seq; /* Sequence number. */
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};
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2016-11-07 19:29:30 +00:00
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#define SEMCTL_ARG_ADDRESS(__arg) &__arg.array
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2000-01-24 12:38:46 +00:00
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2016-11-07 19:29:30 +00:00
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#define MSGRCV_ARGS(__msgp, __msgtyp) \
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((long int []){ (long int) __msgp, __msgtyp })
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2019-05-15 13:23:49 +00:00
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/* This macro is required to handle the s390 variants, which passes the
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arguments in a different order than default. */
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#define SEMTIMEDOP_IPC_ARGS(__nsops, __sops, __timeout) \
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(__nsops), 0, (__sops), (__timeout)
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sysv: linux: Add 64-bit time_t variant for semctl
Different than others 64-bit time_t syscalls, the SysIPC interface
does not provide a new set of syscall for y2038 safeness. Instead it
uses unused fields in semid_ds structure to return the high bits for
the timestamps.
To provide a y2038 safe interface a new symbol __semctl64 is added
and __semctl is change to call it instead (it adds some extra buffer
copying for the 32 bit time_t implementation).
Two new structures are added:
1. kernel_semid64_ds: used internally only on 32-bit architectures
to issue the syscall. A handful of architectures (hppa, i386,
mips, powerpc32, sparc32) require specific implementations due
their kernel ABI.
2. semid_ds64: this is only for __TIMESIZE != 64 to use along with
the 64-bit semctl. It is different than the kernel struct because
the exported 64-bit time_t might require different alignment
depending on the architecture ABI.
So the resulting implementation does:
1. For 64-bit architectures it assumes semid_ds already contains
64-bit time_t fields and will result in just the __semctl symbol
using the __semctl64 code. The semid_ds argument is passed as-is
to the syscall.
2. For 32-bit architectures with default 64-bit time_t (newer ABIs
such riscv32 or arc), it will also result in only one exported
symbol but with the required high/low handling.
It might be possible to optimize it further to avoid the
kernel_semid64_ds to semun transformation if the exported ABI
for the architectures matches the expected kernel ABI, but the
implementation is already complex enough and don't think this
should be a hotspot in any case.
3. Finally for 32-bit architecture with both 32-bit and 64-bit time_t
support we follow the already set way to provide one symbol with
64-bit time_t support and implement the 32-bit time_t support
using the 64-bit one.
The default 32-bit symbol will allocate and copy the semid_ds
over multiple buffers, but this should be deprecated in favor
of the __semctl64 anyway.
Checked on i686-linux-gnu and x86_64-linux-gnu. I also did some sniff
tests on powerpc, powerpc64, mips, mips64, armhf, sparcv9, and
sparc64.
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Tested-by: Alistair Francis <alistair.francis@wdc.com>
Tested-by: Vineet Gupta <vgupta@synopsys.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2020-06-29 16:35:50 +00:00
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/* Linux SysV ipc does not provide new syscalls for 64-bit time support on
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32-bit architectures, but rather split the timestamp into high and low;
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storing the high value in previously unused fields. */
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#if (__WORDSIZE == 32 \
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&& (!defined __SYSCALL_WORDSIZE || __SYSCALL_WORDSIZE == 32))
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# define __IPC_TIME64 1
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#else
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# define __IPC_TIME64 0
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#endif
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2016-11-07 19:29:30 +00:00
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#include <ipc_ops.h>
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