avr32: wire up missing syscalls

This patch adds a bunch of missing syscalls to AVR32:
__NR_pread64
__NR_pwrite64
__NR_timerfd_create
__NR_fallocate
__NR_timerfd_settime
__NR_timerfd_gettime
__NR_signalfd4
__NR_eventfd2
__NR_epoll_create1
__NR_dup3
__NR_pipe2
__NR_inotify_init1
__NR_preadv
__NR_pwritev
__NR_rt_tgsigqueueinfo
__NR_perf_event_open
__NR_recvmmsg
__NR_fanotify_init
__NR_fanotify_mark
__NR_prlimit64
__NR_name_to_handle_at
__NR_open_by_handle_at
__NR_clock_adjtime
__NR_syncfs
__NR_sendmmsg
__NR_process_vm_readv
__NR_process_vm_writev
__NR_kcmp
__NR_finit_module
__NR_sched_setattr
__NR_sched_getattr
__NR_renameat2
__NR_seccomp
__NR_getrandom
__NR_memfd_create
__NR_bpf
__NR_execveat

On AVR32, all parameters beyond the 5th are passed on the stack. System
calls don't use the stack -- they borrow a callee-saved register
instead. This means that syscalls that take 6 parameters must be called
through a stub that pushes the last parameter on the stack.

This relates to syscall fallocate, fanotify_mark, process_vm_readv, and
process_vm_writev.

Signed-off-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>

2 files changed, 73 insertions, 0 deletions

diff --git a/arch/avr32/kernel/syscall-stubs.S b/arch/avr32/kernel/syscall-stubs.S
index b5fc927..f9c68fa 100644
--- a/arch/avr32/kernel/syscall-stubs.S
+++ b/arch/avr32/kernel/syscall-stubs.S
@@ -88,3 +88,39 @@ __sys_sync_file_range:
 	call	sys_sync_file_range
 	sub	sp, -4
 	popm	pc
+
+	.global __sys_fallocate
+	.type	__sys_fallocate,@function
+__sys_fallocate:
+	pushm	lr
+	st.w	--sp, ARG6
+	call	sys_fallocate
+	sub	sp, -4
+	popm	pc
+
+	.global __sys_fanotify_mark
+	.type	__sys_fanotify_mark,@function
+__sys_fanotify_mark:
+	pushm	lr
+	st.w	--sp, ARG6
+	call	sys_fanotify_mark
+	sub	sp, -4
+	popm	pc
+
+	.global __sys_process_vm_readv
+	.type	__sys_process_vm_readv,@function
+__sys_process_vm_readv:
+	pushm	lr
+	st.w	--sp, ARG6
+	call	sys_process_vm_readv
+	sub	sp, -4
+	popm	pc
+
+	.global __sys_process_vm_writev
+	.type	__sys_process_vm_writev,@function
+__sys_process_vm_writev:
+	pushm	lr
+	st.w	--sp, ARG6
+	call	sys_process_vm_writev
+	sub	sp, -4
+	popm	pc
diff --git a/arch/avr32/kernel/syscall_table.S b/arch/avr32/kernel/syscall_table.S
index 017a904..c3b593b 100644
--- a/arch/avr32/kernel/syscall_table.S
+++ b/arch/avr32/kernel/syscall_table.S
@@ -297,4 +297,41 @@ sys_call_table:
 	.long	sys_eventfd
 	.long	sys_recvmmsg
 	.long	sys_setns
+	.long	sys_pread64
+	.long	sys_pwrite64		/* 285 */
+	.long	sys_timerfd_create
+	.long	__sys_fallocate
+	.long	sys_timerfd_settime
+	.long	sys_timerfd_gettime
+	.long	sys_signalfd4		/* 290 */
+	.long	sys_eventfd2
+	.long	sys_epoll_create1
+	.long	sys_dup3
+	.long	sys_pipe2
+	.long	sys_inotify_init1	/* 295 */
+	.long	sys_preadv
+	.long	sys_pwritev
+	.long	sys_rt_tgsigqueueinfo
+	.long	sys_perf_event_open
+	.long	sys_recvmmsg		/* 300 */
+	.long	sys_fanotify_init
+	.long	__sys_fanotify_mark
+	.long	sys_prlimit64
+	.long	sys_name_to_handle_at
+	.long	sys_open_by_handle_at	/* 305 */
+	.long	sys_clock_adjtime
+	.long	sys_syncfs
+	.long	sys_sendmmsg
+	.long	__sys_process_vm_readv
+	.long	__sys_process_vm_writev	/* 310 */
+	.long	sys_kcmp
+	.long	sys_finit_module
+	.long	sys_sched_setattr
+	.long	sys_sched_getattr
+	.long	sys_renameat2		/* 315 */
+	.long	sys_seccomp
+	.long	sys_getrandom
+	.long	sys_memfd_create
+	.long	sys_bpf
+	.long	sys_execveat		/* 320 */
 	.long	sys_ni_syscall		/* r8 is saturated at nr_syscalls */