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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-09-30 16:52:19 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-09-30 18:03:51 -0300 |
| commit | 2deb7793907c7995b094b3778017c0ef0bd432d5 (patch) | |
| tree | cc45621ef69c9007149aa53b50242e76d9ed2d2f | |
| parent | e75fbaaa21563cecccfda9705260ae0b608ed660 (diff) | |
| download | glibc-2deb7793907c7995b094b3778017c0ef0bd432d5.tar.gz | |
sysvipc: Fix semtimedop for Linux < 5.1 for 64-bit ABI
Both powerpc64 and s390x provides semtimedop through __NR_ipc for
pre v5.1 kernel. Neither the y2038 support (7c437d3778) nor the
attempt to fix an issue for !__ASSUME_DIRECT_SYSVIPC_SYSCALLS
(aaa12e9ff0) took this in consideration.
This patch fixes it by issuing __NR_semtimedop_time64 iff it is
defined, otherwise __NR_semtimeop is issued if both
__ASSUME_DIRECT_SYSVIPC_SYSCALLS it set and __NR_semtimedop is
define, other __NR_ipc is used instead. To summarize:
1. For 32-bit architetures __NR_semtimedop_time64 is always
issued. The fallback is used only for !__ASSUME_TIME64_SYSCALLS
and it issues either __NR_ipc or __NR_semtimedop.
2. For 64-bit architecture with wire-up SysV syscall
(__ASSUME_DIRECT_SYSVIPC_SYSCALLS and __NR_semtimeop defined)
__NR_semtimeop is issued.
3. Otherwise __NR_ipc is used instead.
Checked on x86_64-linux-gnu, i686-linux-gnu (kernel 4.15 and 5.4),
powerpc64le (kernel 4.18), and s390x (kernel 4.12).
Reviewed-by: Matheus Castanho <msc@linux.ibm.com>
| -rw-r--r-- | sysdeps/unix/sysv/linux/semtimedop.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/semtimedop.c b/sysdeps/unix/sysv/linux/semtimedop.c index a9ad922ee2..29647f8ccd 100644 --- a/sysdeps/unix/sysv/linux/semtimedop.c +++ b/sysdeps/unix/sysv/linux/semtimedop.c @@ -26,11 +26,15 @@ int __semtimedop64 (int semid, struct sembuf *sops, size_t nsops, const struct __timespec64 *timeout) { -#ifndef __NR_semtimedop_time64 -# define __NR_semtimedop_time64 __NR_semtimedop + int r; +#if defined __NR_semtimedop_time64 + r = INLINE_SYSCALL_CALL (semtimedop_time64, semid, sops, nsops, timeout); +#elif defined __ASSUME_DIRECT_SYSVIPC_SYSCALLS && defined __NR_semtimedop + r = INLINE_SYSCALL_CALL (semtimedop, semid, sops, nsops, timeout); +#else + r = INLINE_SYSCALL_CALL (ipc, IPCOP_semtimedop, semid, + SEMTIMEDOP_IPC_ARGS (nsops, sops, timeout)); #endif - int r = INLINE_SYSCALL_CALL (semtimedop_time64, semid, sops, nsops, - timeout); #ifndef __ASSUME_TIME64_SYSCALLS if (r == 0 || errno != ENOSYS) |