From 6aa2f6aaca0afba79b362b40cea9501260a7e9ba Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Thu, 10 Jan 2019 12:45:11 +0100
Subject: [PATCH] BACKPORT: 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: Arnd Bergmann <arnd@arndb.de>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm/tools/syscall.tbl             | 21 ++++++++++++
 arch/arm64/include/asm/unistd32.h      | 42 ++++++++++++++++++++++++
 arch/x86/entry/syscalls/syscall_32.tbl | 21 ++++++++++++
 include/uapi/asm-generic/unistd.h      | 44 ++++++++++++++++++++++++++
 scripts/checksyscalls.sh               | 40 +++++++++++++++++++++++
 5 files changed, 168 insertions(+)

diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
index f58885d46d8f..9d87127f33e8 100644
--- a/arch/arm/tools/syscall.tbl
+++ b/arch/arm/tools/syscall.tbl
@@ -412,5 +412,26 @@
 395	common	pkey_alloc		sys_pkey_alloc
 396	common	pkey_free		sys_pkey_free
 397	common	statx			sys_statx
+# 398-402 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
 425	common	io_uring_setup		sys_io_uring_setup
 426	common	io_uring_enter		sys_io_uring_enter
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 39c43e6c0350..ba9554572592 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -817,6 +817,48 @@ __SYSCALL(__NR_pkey_alloc, sys_pkey_alloc)
 __SYSCALL(__NR_pkey_free, sys_pkey_free)
 #define __NR_statx 397
 __SYSCALL(__NR_statx, sys_statx)
+/* 398-402 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)
+/* 424 is unused */
 #define __NR_io_uring_setup 425
 __SYSCALL(__NR_io_uring_setup, sys_io_uring_setup)
 #define __NR_io_uring_enter 426
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index 8f09b3d99eca..b056050a44ba 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -391,5 +391,26 @@
 382	i386	pkey_free		sys_pkey_free
 383	i386	statx			sys_statx
 384	i386	arch_prctl		sys_arch_prctl			compat_sys_arch_prctl
+# don't use numbers 387 through 392, add new calls at the end
+403	i386	clock_gettime64		sys_clock_gettime		__ia32_sys_clock_gettime
+404	i386	clock_settime64		sys_clock_settime		__ia32_sys_clock_settime
+405	i386	clock_adjtime64		sys_clock_adjtime		__ia32_sys_clock_adjtime
+406	i386	clock_getres_time64	sys_clock_getres		__ia32_sys_clock_getres
+407	i386	clock_nanosleep_time64	sys_clock_nanosleep		__ia32_sys_clock_nanosleep
+408	i386	timer_gettime64		sys_timer_gettime		__ia32_sys_timer_gettime
+409	i386	timer_settime64		sys_timer_settime		__ia32_sys_timer_settime
+410	i386	timerfd_gettime64	sys_timerfd_gettime		__ia32_sys_timerfd_gettime
+411	i386	timerfd_settime64	sys_timerfd_settime		__ia32_sys_timerfd_settime
+412	i386	utimensat_time64	sys_utimensat			__ia32_sys_utimensat
+413	i386	pselect6_time64		sys_pselect6			__ia32_compat_sys_pselect6_time64
+414	i386	ppoll_time64		sys_ppoll			__ia32_compat_sys_ppoll_time64
+416	i386	io_pgetevents_time64	sys_io_pgetevents		__ia32_sys_io_pgetevents
+417	i386	recvmmsg_time64		sys_recvmmsg			__ia32_compat_sys_recvmmsg_time64
+418	i386	mq_timedsend_time64	sys_mq_timedsend		__ia32_sys_mq_timedsend
+419	i386	mq_timedreceive_time64	sys_mq_timedreceive		__ia32_sys_mq_timedreceive
+420	i386	semtimedop_time64	sys_semtimedop			__ia32_sys_semtimedop
+421	i386	rt_sigtimedwait_time64	sys_rt_sigtimedwait		__ia32_compat_sys_rt_sigtimedwait_time64
+422	i386	futex_time64		sys_futex			__ia32_sys_futex
+423	i386	sched_rr_get_interval_time64	sys_sched_rr_get_interval	__ia32_sys_sched_rr_get_interval
 425	i386	io_uring_setup		sys_io_uring_setup		__ia32_sys_io_uring_setup
 426	i386	io_uring_enter		sys_io_uring_enter		__ia32_sys_io_uring_enter
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index cd1b40f29c5f..fb577f978ddb 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -732,6 +732,50 @@ __SYSCALL(__NR_pkey_alloc,    sys_pkey_alloc)
 __SYSCALL(__NR_pkey_free,     sys_pkey_free)
 #define __NR_kexec_file_load 291
 __SYSCALL(__NR_statx,     sys_statx)
+/* 292 through 402 are unassigned to sync up with generic numbers, don't use */
+#if __BITS_PER_LONG == 32
+#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
+__SC_COMP(__NR_pselect6_time64, sys_pselect6, compat_sys_pselect6_time64)
+#define __NR_ppoll_time64 414
+__SC_COMP(__NR_ppoll_time64, sys_ppoll, compat_sys_ppoll_time64)
+#define __NR_io_pgetevents_time64 416
+__SYSCALL(__NR_io_pgetevents_time64, sys_io_pgetevents)
+#define __NR_recvmmsg_time64 417
+__SC_COMP(__NR_recvmmsg_time64, sys_recvmmsg, 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
+__SC_COMP(__NR_rt_sigtimedwait_time64, sys_rt_sigtimedwait, 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)
+#endif
+/* 424 is unused */
 #define __NR_io_uring_setup 425
 __SYSCALL(__NR_io_uring_setup, sys_io_uring_setup)
 #define __NR_io_uring_enter 426
diff --git a/scripts/checksyscalls.sh b/scripts/checksyscalls.sh
index ee3dfb5be6cd..b7f01867bf7e 100755
--- a/scripts/checksyscalls.sh
+++ b/scripts/checksyscalls.sh
@@ -84,6 +84,26 @@ cat << EOF
 #define __IGNORE_statfs64
 #define __IGNORE_llseek
 #define __IGNORE_mmap2
+#define __IGNORE_clock_gettime64
+#define __IGNORE_clock_settime64
+#define __IGNORE_clock_adjtime64
+#define __IGNORE_clock_getres_time64
+#define __IGNORE_clock_nanosleep_time64
+#define __IGNORE_timer_gettime64
+#define __IGNORE_timer_settime64
+#define __IGNORE_timerfd_gettime64
+#define __IGNORE_timerfd_settime64
+#define __IGNORE_utimensat_time64
+#define __IGNORE_pselect6_time64
+#define __IGNORE_ppoll_time64
+#define __IGNORE_io_pgetevents_time64
+#define __IGNORE_recvmmsg_time64
+#define __IGNORE_mq_timedsend_time64
+#define __IGNORE_mq_timedreceive_time64
+#define __IGNORE_semtimedop_time64
+#define __IGNORE_rt_sigtimedwait_time64
+#define __IGNORE_futex_time64
+#define __IGNORE_sched_rr_get_interval_time64
 #else
 #define __IGNORE_sendfile
 #define __IGNORE_ftruncate
@@ -98,6 +118,26 @@ cat << EOF
 #define __IGNORE_statfs
 #define __IGNORE_lseek
 #define __IGNORE_mmap
+#define __IGNORE_clock_gettime
+#define __IGNORE_clock_settime
+#define __IGNORE_clock_adjtime
+#define __IGNORE_clock_getres
+#define __IGNORE_clock_nanosleep
+#define __IGNORE_timer_gettime
+#define __IGNORE_timer_settime
+#define __IGNORE_timerfd_gettime
+#define __IGNORE_timerfd_settime
+#define __IGNORE_utimensat
+#define __IGNORE_pselect6
+#define __IGNORE_ppoll
+#define __IGNORE_io_pgetevents
+#define __IGNORE_recvmmsg
+#define __IGNORE_mq_timedsend
+#define __IGNORE_mq_timedreceiv
+#define __IGNORE_semtimedop
+#define __IGNORE_rt_sigtimedwait
+#define __IGNORE_futex
+#define __IGNORE_sched_rr_get_interval
 #endif
 
 /* i386-specific or historical system calls */
-- 
2.30.1