Commit 48166e6e authored by Arnd Bergmann's avatar Arnd Bergmann
Browse files

y2038: add 64-bit time_t syscalls to all 32-bit architectures 



This adds 21 new system calls on each ABI that has 32-bit time_t
today. All of these have the exact same semantics as their existing
counterparts, and the new ones all have macro names that end in 'time64'
for clarification.

This gets us to the point of being able to safely use a C library
that has 64-bit time_t in user space. There are still a couple of
loose ends to tie up in various areas of the code, but this is the
big one, and should be entirely uncontroversial at this point.

In particular, there are four system calls (getitimer, setitimer,
waitid, and getrusage) that don't have a 64-bit counterpart yet,
but these can all be safely implemented in the C library by wrapping
around the existing system calls because the 32-bit time_t they
pass only counts elapsed time, not time since the epoch. They
will be dealt with later.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent d33c577c

arch/alpha/kernel/syscalls/syscall.tbl

+2 −0
Original line number Diff line number Diff line
@@ -461,3 +461,5 @@ 
530	common	getegid				sys_getegid

531	common	geteuid				sys_geteuid

532	common	getppid				sys_getppid

# all other architectures have common numbers for new syscall, alpha

# is the exception.

arch/arm/tools/syscall.tbl

+21 −0
Original line number Diff line number Diff line
@@ -416,3 +416,24 @@ 
399	common	io_pgetevents		sys_io_pgetevents_time32

400	common	migrate_pages		sys_migrate_pages

401	common	kexec_file_load		sys_kexec_file_load

# 402 is unused

403	common	clock_gettime64			sys_clock_gettime

404	common	clock_settime64			sys_clock_settime

405	common	clock_adjtime64			sys_clock_adjtime

406	common	clock_getres_time64		sys_clock_getres

407	common	clock_nanosleep_time64		sys_clock_nanosleep

408	common	timer_gettime64			sys_timer_gettime

409	common	timer_settime64			sys_timer_settime

410	common	timerfd_gettime64		sys_timerfd_gettime

411	common	timerfd_settime64		sys_timerfd_settime

412	common	utimensat_time64		sys_utimensat

413	common	pselect6_time64			sys_pselect6

414	common	ppoll_time64			sys_ppoll

416	common	io_pgetevents_time64		sys_io_pgetevents

417	common	recvmmsg_time64			sys_recvmmsg

418	common	mq_timedsend_time64		sys_mq_timedsend

419	common	mq_timedreceive_time64		sys_mq_timedreceive

420	common	semtimedop_time64		sys_semtimedop

421	common	rt_sigtimedwait_time64		sys_rt_sigtimedwait

422	common	futex_time64			sys_futex

423	common	sched_rr_get_interval_time64	sys_sched_rr_get_interval

arch/arm64/include/asm/unistd.h

+1 −1
Original line number Diff line number Diff line
@@ -44,7 +44,7 @@ 
#define __ARM_NR_compat_set_tls		(__ARM_NR_COMPAT_BASE + 5)

#define __ARM_NR_COMPAT_END		(__ARM_NR_COMPAT_BASE + 0x800)



#define __NR_compat_syscalls		402

#define __NR_compat_syscalls		424

#endif



#define __ARCH_WANT_SYS_CLONE

arch/arm64/include/asm/unistd32.h

+41 −0
Original line number Diff line number Diff line
@@ -825,6 +825,47 @@ __SYSCALL(__NR_io_pgetevents, compat_sys_io_pgetevents) 
__SYSCALL(__NR_migrate_pages, compat_sys_migrate_pages)

#define __NR_kexec_file_load 401

__SYSCALL(__NR_kexec_file_load, sys_kexec_file_load)

/* 402 is unused */

#define __NR_clock_gettime64 403

__SYSCALL(__NR_clock_gettime64, sys_clock_gettime)

#define __NR_clock_settime64 404

__SYSCALL(__NR_clock_settime64, sys_clock_settime)

#define __NR_clock_adjtime64 405

__SYSCALL(__NR_clock_adjtime64, sys_clock_adjtime)

#define __NR_clock_getres_time64 406

__SYSCALL(__NR_clock_getres_time64, sys_clock_getres)

#define __NR_clock_nanosleep_time64 407

__SYSCALL(__NR_clock_nanosleep_time64, sys_clock_nanosleep)

#define __NR_timer_gettime64 408

__SYSCALL(__NR_timer_gettime64, sys_timer_gettime)

#define __NR_timer_settime64 409

__SYSCALL(__NR_timer_settime64, sys_timer_settime)

#define __NR_timerfd_gettime64 410

__SYSCALL(__NR_timerfd_gettime64, sys_timerfd_gettime)

#define __NR_timerfd_settime64 411

__SYSCALL(__NR_timerfd_settime64, sys_timerfd_settime)

#define __NR_utimensat_time64 412

__SYSCALL(__NR_utimensat_time64, sys_utimensat)

#define __NR_pselect6_time64 413

__SYSCALL(__NR_pselect6_time64, compat_sys_pselect6_time64)

#define __NR_ppoll_time64 414

__SYSCALL(__NR_ppoll_time64, compat_sys_ppoll_time64)

#define __NR_io_pgetevents_time64 416

__SYSCALL(__NR_io_pgetevents_time64, sys_io_pgetevents)

#define __NR_recvmmsg_time64 417

__SYSCALL(__NR_recvmmsg_time64, compat_sys_recvmmsg_time64)

#define __NR_mq_timedsend_time64 418

__SYSCALL(__NR_mq_timedsend_time64, sys_mq_timedsend)

#define __NR_mq_timedreceive_time64 419

__SYSCALL(__NR_mq_timedreceive_time64, sys_mq_timedreceive)

#define __NR_semtimedop_time64 420

__SYSCALL(__NR_semtimedop_time64, sys_semtimedop)

#define __NR_rt_sigtimedwait_time64 421

__SYSCALL(__NR_rt_sigtimedwait_time64, compat_sys_rt_sigtimedwait_time64)

#define __NR_futex_time64 422

__SYSCALL(__NR_futex_time64, sys_futex)

#define __NR_sched_rr_get_interval_time64 423

__SYSCALL(__NR_sched_rr_get_interval_time64, sys_sched_rr_get_interval)



/*

 * Please add new compat syscalls above this comment and update

arch/ia64/kernel/syscalls/syscall.tbl

+1 −0
Original line number Diff line number Diff line
@@ -343,3 +343,4 @@ 
331	common	pkey_alloc			sys_pkey_alloc

332	common	pkey_free			sys_pkey_free

333	common	rseq				sys_rseq

# 334 through 423 are reserved to sync up with other architectures

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