glibc/sysdeps/unix/sysv/linux/i386
Adhemerval Zanella ffd178c651 sysv: linux: Add 64-bit time_t variant for shmctl
To provide a y2038 safe interface a new symbol __shmctl64 is added
and __shmctl 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_shmid64_ds: used internally only on 32-bit architectures
     to issue the syscall.  A handful of architectures (hppa, i386,
     mips, powerpc32, and sparc32) require specific implementations
     due to their kernel ABI.

  2. shmid_ds64: this is only for __TIMESIZE != 64 to use along with
     the 64-bit shmctl.  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 shmid_ds already contains
     64-bit time_t fields and will result in just the __shmctl symbol
     using the __shmctl64 code.  The shmid_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 time handling.

  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 of the 64-bit one.

     The default 32-bit symbol will allocate and copy the shmid_ds
     over multiple buffers, but this should be deprecated in favor
     of the __shmctl64 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: Carlos O'Donell <carlos@redhat.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2020-07-09 12:05:47 -03:00
..
i686 Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
i786 Move remaining nptl/sysdeps/unix/sysv/linux/i386/ files. 2014-05-14 13:37:40 -07:00
____longjmp_chk.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
arch-syscall.h Update syscall lists for Linux 5.6. 2020-04-03 18:07:55 +00:00
brk.c linux: Remove INTERNAL_SYSCALL_DECL 2020-02-14 21:12:45 -03:00
c++-types.data x86: Move abilist files out of nptl/ subdirectories. 2014-05-14 15:45:23 -07:00
clone.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
configure Require Linux kernel 3.2 or later on x86 / x86_64. 2017-05-08 10:45:20 +00:00
configure.ac Require Linux kernel 3.2 or later on x86 / x86_64. 2017-05-08 10:45:20 +00:00
dl-librecon.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-procinfo.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-sysdep.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
fxstat.c linux: Remove INTERNAL_SYSCALL_DECL 2020-02-14 21:12:45 -03:00
fxstatat.c linux: Remove INTERNAL_SYSCALL_DECL 2020-02-14 21:12:45 -03:00
getcontext.S i386: Enable CET support in ucontext functions 2020-02-14 15:15:25 -08:00
Implies NPTL is no longer an add-on! 2014-07-07 09:29:06 -07:00
jmp_buf-macros.h Add jmp_buf-macros.h 2017-11-09 05:10:03 -08:00
kernel-features.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ld.abilist ld.so: Do not export free/calloc/malloc/realloc functions [BZ #25486] 2020-02-15 11:01:23 +01:00
ldconfig.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
libanl.abilist Ignore absolute symbols in ABI tests. 2018-05-04 15:46:32 +00:00
libBrokenLocale.abilist Ignore absolute symbols in ABI tests. 2018-05-04 15:46:32 +00:00
libc-do-syscall.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
libc.abilist string: Add strerrorname_np and strerrordesc_np 2020-07-07 15:02:57 -03:00
libcrypt.abilist Ignore absolute symbols in ABI tests. 2018-05-04 15:46:32 +00:00
libdl.abilist Ignore absolute symbols in ABI tests. 2018-05-04 15:46:32 +00:00
libm.abilist New exp10f version without SVID compat wrapper 2020-06-19 12:08:47 -03:00
libnsl.abilist Ignore absolute symbols in ABI tests. 2018-05-04 15:46:32 +00:00
libpthread.abilist nptl: Move pthread_gettattr_np into libc 2020-05-20 20:27:49 +02:00
libresolv.abilist Ignore absolute symbols in ABI tests. 2018-05-04 15:46:32 +00:00
librt.abilist Finish move of clock_* functions to libc. [BZ #24959] 2019-09-04 14:39:38 +02:00
libthread_db.abilist Ignore absolute symbols in ABI tests. 2018-05-04 15:46:32 +00:00
libutil.abilist Ignore absolute symbols in ABI tests. 2018-05-04 15:46:32 +00:00
localplt.data ld.so: Do not export free/calloc/malloc/realloc functions [BZ #25486] 2020-02-15 11:01:23 +01:00
lxstat.c linux: Remove INTERNAL_SYSCALL_DECL 2020-02-14 21:12:45 -03:00
makecontext.S i386: Enable CET support in ucontext functions 2020-02-14 15:15:25 -08:00
Makefile i386: Fix i386 sigaction sa_restorer initialization (BZ#21269) 2018-03-05 18:08:27 -03:00
readelflib.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
register-dump.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
setcontext.S i386: Enable CET support in ucontext functions 2020-02-14 15:15:25 -08:00
shlib-versions Clean up gnu/lib-names.h generation (bug 14171). 2014-09-26 17:33:04 +00:00
sigaction.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sigcontextinfo.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
smp.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
startup.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
struct_kernel_msqid64_ds.h sysv: linux: Add 64-bit time_t variant for msgctl 2020-07-09 12:05:40 -03:00
struct_kernel_semid64_ds.h sysv: linux: Add 64-bit time_t variant for semctl 2020-07-09 12:05:35 -03:00
struct_kernel_shmid64_ds.h sysv: linux: Add 64-bit time_t variant for shmctl 2020-07-09 12:05:47 -03:00
swapcontext.S i386: Enable CET support in ucontext functions 2020-02-14 15:15:25 -08:00
syscall.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
syscalls.list posix: Consolidate Linux waitpid syscall 2017-05-18 18:06:47 -03:00
sysdep.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sysdep.h i686: Add INTERNAL_SYSCALL_NCS 6 argument support 2020-04-17 11:40:33 -03:00
tst-bz21269.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ucontext_i.sym i386: Enable CET support in ucontext functions 2020-02-14 15:15:25 -08:00
Versions Clean pthread functions namespaces for C11 threads 2017-06-23 17:38:17 -03:00
vfork.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
xstat.c linux: Remove INTERNAL_SYSCALL_DECL 2020-02-14 21:12:45 -03:00