linux/arch/avr32/kernel/syscall-stubs.S
Hans-Christian Egtvedt f3240c1f6d 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>
2015-02-09 15:27:44 +01:00

127 lines
2.2 KiB
ArmAsm

/*
* Copyright (C) 2005-2006 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Stubs for syscalls that require access to pt_regs or that take more
* than five parameters.
*/
#define ARG6 r3
.text
.global __sys_rt_sigsuspend
.type __sys_rt_sigsuspend,@function
__sys_rt_sigsuspend:
mov r10, sp
rjmp sys_rt_sigsuspend
.global __sys_rt_sigreturn
.type __sys_rt_sigreturn,@function
__sys_rt_sigreturn:
mov r12, sp
rjmp sys_rt_sigreturn
.global __sys_mmap2
.type __sys_mmap2,@function
__sys_mmap2:
pushm lr
st.w --sp, ARG6
call sys_mmap_pgoff
sub sp, -4
popm pc
.global __sys_sendto
.type __sys_sendto,@function
__sys_sendto:
pushm lr
st.w --sp, ARG6
call sys_sendto
sub sp, -4
popm pc
.global __sys_recvfrom
.type __sys_recvfrom,@function
__sys_recvfrom:
pushm lr
st.w --sp, ARG6
call sys_recvfrom
sub sp, -4
popm pc
.global __sys_pselect6
.type __sys_pselect6,@function
__sys_pselect6:
pushm lr
st.w --sp, ARG6
call sys_pselect6
sub sp, -4
popm pc
.global __sys_splice
.type __sys_splice,@function
__sys_splice:
pushm lr
st.w --sp, ARG6
call sys_splice
sub sp, -4
popm pc
.global __sys_epoll_pwait
.type __sys_epoll_pwait,@function
__sys_epoll_pwait:
pushm lr
st.w --sp, ARG6
call sys_epoll_pwait
sub sp, -4
popm pc
.global __sys_sync_file_range
.type __sys_sync_file_range,@function
__sys_sync_file_range:
pushm lr
st.w --sp, ARG6
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