mirror of git://sourceware.org/git/glibc.git
ffd178c651
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>
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| arpa | ||
| bits | ||
| gnu | ||
| net | ||
| netinet | ||
| programs | ||
| protocols | ||
| rpc | ||
| rpcsvc | ||
| sys | ||
| aio.h | ||
| aliases.h | ||
| alloc_buffer.h | ||
| alloca.h | ||
| allocate_once.h | ||
| ar.h | ||
| argp-fmtstream.h | ||
| argp.h | ||
| argz.h | ||
| array_length.h | ||
| assert.h | ||
| atomic.h | ||
| byteswap.h | ||
| complex.h | ||
| cpio.h | ||
| crypt.h | ||
| ctype.h | ||
| des.h | ||
| dirent.h | ||
| dlfcn.h | ||
| dso_handle.h | ||
| elf.h | ||
| endian.h | ||
| envz.h | ||
| err.h | ||
| errno.h | ||
| error.h | ||
| execinfo.h | ||
| fcntl.h | ||
| features.h | ||
| fenv.h | ||
| file_change_detection.h | ||
| float.h | ||
| fmtmsg.h | ||
| fnmatch.h | ||
| fpu_control.h | ||
| fstab.h | ||
| fts.h | ||
| ftw.h | ||
| gconv.h | ||
| getopt.h | ||
| getopt_int.h | ||
| glob.h | ||
| gmp.h | ||
| gnu-versions.h | ||
| grp-merge.h | ||
| grp.h | ||
| gshadow.h | ||
| iconv.h | ||
| ifaddrs.h | ||
| ifreq.h | ||
| ifunc-impl-list.h | ||
| inline-hashtab.h | ||
| intprops.h | ||
| inttypes.h | ||
| langinfo.h | ||
| lastlog.h | ||
| libc-diag.h | ||
| libc-internal.h | ||
| libc-pointer-arith.h | ||
| libc-symbols.h | ||
| libgen.h | ||
| libintl.h | ||
| limits.h | ||
| link.h | ||
| list.h | ||
| list_t.h | ||
| locale.h | ||
| loop_unroll.h | ||
| malloc.h | ||
| math-narrow-eval.h | ||
| math.h | ||
| mcheck.h | ||
| memory.h | ||
| mntent.h | ||
| monetary.h | ||
| mqueue.h | ||
| netdb.h | ||
| netgroup.h | ||
| nl_types.h | ||
| nss.h | ||
| nsswitch.h | ||
| obstack.h | ||
| plural-exp.h | ||
| poll.h | ||
| printf.h | ||
| pthread.h | ||
| pty.h | ||
| pwd.h | ||
| random-bits.h | ||
| re_comp.h | ||
| regex.h | ||
| regexp.h | ||
| resolv.h | ||
| rounding-mode.h | ||
| rtld-malloc.h | ||
| sched.h | ||
| scratch_buffer.h | ||
| search.h | ||
| set-hooks.h | ||
| setjmp.h | ||
| sgtty.h | ||
| shadow.h | ||
| shlib-compat.h | ||
| signal.h | ||
| spawn.h | ||
| stab.h | ||
| stackinfo.h | ||
| stap-probe.h | ||
| stdc-predef.h | ||
| stdint.h | ||
| stdio.h | ||
| stdio_ext.h | ||
| stdlib.h | ||
| string.h | ||
| strings.h | ||
| struct___timespec64.h | ||
| struct___timeval64.h | ||
| stubs-prologue.h | ||
| syscall.h | ||
| sysexits.h | ||
| syslog.h | ||
| tar.h | ||
| termios.h | ||
| tgmath.h | ||
| time.h | ||
| ttyent.h | ||
| uchar.h | ||
| ucontext.h | ||
| ulimit.h | ||
| unistd.h | ||
| utime.h | ||
| utmp.h | ||
| values.h | ||
| verify.h | ||
| wait.h | ||
| wchar.h | ||
| wctype.h | ||
| wordexp.h | ||