glibc/sysdeps/unix/sysv/linux/hppa
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
..
bits sysv: linux: Add 64-bit time_t variant for shmctl 2020-07-09 12:05:47 -03:00
sys Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
____longjmp_chk.c linux: Remove INTERNAL_SYSCALL_DECL 2020-02-14 21:12:45 -03:00
arch-syscall.h Update syscall lists for Linux 5.6. 2020-04-03 18:07:55 +00:00
atomic-machine.h Fix data race in setting function descriptors during lazy binding on hppa. 2020-03-30 20:36:49 +00:00
brk.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
c++-types.data
clone.S Linux: Use system call tables during build 2020-01-02 10:18:23 +01:00
errlist-compat.c signal: Move sys_errlist to a compat symbol 2020-07-07 14:10:58 -03:00
fxstat.c
fxstatat.c
getcontext.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
Implies
jmp_buf-macros.h
kernel_stat.h
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
libanl.abilist
libBrokenLocale.abilist
libc.abilist string: Add strerrorname_np and strerrordesc_np 2020-07-07 15:02:57 -03:00
libcrypt.abilist
libdl.abilist
libm.abilist New exp10f version without SVID compat wrapper 2020-06-19 12:08:47 -03:00
libnsl.abilist
libpthread.abilist nptl: Move pthread_gettattr_np into libc 2020-05-20 20:27:49 +02:00
libresolv.abilist
librt.abilist Finish move of clock_* functions to libc. [BZ #24959] 2019-09-04 14:39:38 +02:00
libthread_db.abilist
libutil.abilist
localplt.data ld.so: Do not export free/calloc/malloc/realloc functions [BZ #25486] 2020-02-15 11:01:23 +01:00
lxstat.c
makecontext.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
Makefile elf: Add elf/check-wx-segment, a test for the presence of WX segments 2020-03-02 14:25:20 +01:00
setcontext.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
shlib-versions
sigcontextinfo.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.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
syscall.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
syscalls.list
sysdep.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sysdep.h linux: Remove INTERNAL_SYSCALL_DECL 2020-02-14 21:12:45 -03:00
ucontext_i.sym
utimes.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
Versions signal: Move sys_errlist to a compat symbol 2020-07-07 14:10:58 -03:00
xstat.c