glibc/sysdeps/unix/sysv/linux/mips
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
mips32 string: Add strerrorname_np and strerrordesc_np 2020-07-07 15:02:57 -03:00
mips64 string: Add strerrorname_np and strerrordesc_np 2020-07-07 15:02:57 -03:00
sys Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
____longjmp_chk.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
_test_and_set.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
brk.c linux: Remove INTERNAL_SYSCALL_DECL 2020-02-14 21:12:45 -03:00
clone.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
configure mips: Force RWX stack for hard-float builds that can run on pre-4.8 kernels 2019-08-23 16:38:04 +00:00
configure.ac mips: Force RWX stack for hard-float builds that can run on pre-4.8 kernels 2019-08-23 16:38:04 +00:00
dl-cache.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-static.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
errlist-compat.c signal: Move sys_errlist to a compat symbol 2020-07-07 14:10:58 -03:00
getcontext.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
getrlimit64.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
getsysstats.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
Implies NPTL is no longer an add-on! 2014-07-07 09:29:06 -07:00
kernel_rt_sigframe.h Rename struct ucontext tag (bug 21457). 2017-06-26 22:03:58 +00:00
kernel_sigaction.h linux: Consolidate sigaction implementation 2018-04-05 17:09:50 -03:00
kernel_stat.h Allow [f]statfs64 to alias [f]statfs 2016-11-22 09:59:12 -08:00
kernel_termios.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
kernel-features.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ldsodefs.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
libc-abis MIPS support for GNU hash 2019-08-29 20:11:42 +00:00
makecontext.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
Makefile elf: Move vDSO setup to rtld (BZ#24967) 2020-01-03 11:22:07 -03:00
mmap_info.h posix: Fix large mmap64 offset for mips64n32 (BZ#24699) 2019-07-10 16:52:50 -03:00
pipe.S Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
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 Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
setrlimit64.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
shlib-versions Remove --enable-obsolete-nsl configure flag 2020-07-08 17:25:57 +02:00
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.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
syscalls.list Consolidate Linux send implementation 2017-03-09 15:22:06 +01:00
sysdep.h mips: Use Linux kABI for syscall return 2020-02-14 21:09:12 -03:00
ucontext_i.sym Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
unwind-arch.h mips: Fix bracktrace result for signal frames 2020-02-18 10:39:03 -03:00
ustat.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
vfork.S Linux: Use system call tables during build 2020-01-02 10:18:23 +01:00
xstatconv.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00