ARM: convert to generated system call tables

Convert ARM to use a similar mechanism to x86 to generate the unistd.h
system call numbers and the various kernel system call tables.  This
means that rather than having to edit three places (asm/unistd.h for
the total number of system calls, uapi/asm/unistd.h for the system call
numbers, and arch/arm/kernel/calls.S for the call table) we have only
one place to edit, making the process much more simple.

The scripts have knowledge of the table padding requirements, so there's
no need to worry about __NR_syscalls not fitting within the immediate
constant field of ALU instructions anymore.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

2 files changed, 44 insertions, 444 deletions

diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
deleted file mode 100644
index 703fa0f3cd8f..000000000000
--- a/arch/arm/kernel/calls.S
+++ /dev/null
@@ -1,412 +0,0 @@
-/*
- *  linux/arch/arm/kernel/calls.S
- *
- *  Copyright (C) 1995-2005 Russell King
- *
- * 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.
- *
- *  This file is included thrice in entry-common.S
- */
-/* 0 */		CALL(sys_restart_syscall)
-		CALL(sys_exit)
-		CALL(sys_fork)
-		CALL(sys_read)
-		CALL(sys_write)
-/* 5 */		CALL(sys_open)
-		CALL(sys_close)
-		CALL(sys_ni_syscall)		/* was sys_waitpid */
-		CALL(sys_creat)
-		CALL(sys_link)
-/* 10 */	CALL(sys_unlink)
-		CALL(sys_execve)
-		CALL(sys_chdir)
-		CALL(OBSOLETE(sys_time))	/* used by libc4 */
-		CALL(sys_mknod)
-/* 15 */	CALL(sys_chmod)
-		CALL(sys_lchown16)
-		CALL(sys_ni_syscall)		/* was sys_break */
-		CALL(sys_ni_syscall)		/* was sys_stat */
-		CALL(sys_lseek)
-/* 20 */	CALL(sys_getpid)
-		CALL(sys_mount)
-		CALL(OBSOLETE(sys_oldumount))	/* used by libc4 */
-		CALL(sys_setuid16)
-		CALL(sys_getuid16)
-/* 25 */	CALL(OBSOLETE(sys_stime))
-		CALL(sys_ptrace)
-		CALL(OBSOLETE(sys_alarm))	/* used by libc4 */
-		CALL(sys_ni_syscall)		/* was sys_fstat */
-		CALL(sys_pause)
-/* 30 */	CALL(OBSOLETE(sys_utime))	/* used by libc4 */
-		CALL(sys_ni_syscall)		/* was sys_stty */
-		CALL(sys_ni_syscall)		/* was sys_getty */
-		CALL(sys_access)
-		CALL(sys_nice)
-/* 35 */	CALL(sys_ni_syscall)		/* was sys_ftime */
-		CALL(sys_sync)
-		CALL(sys_kill)
-		CALL(sys_rename)
-		CALL(sys_mkdir)
-/* 40 */	CALL(sys_rmdir)
-		CALL(sys_dup)
-		CALL(sys_pipe)
-		CALL(sys_times)
-		CALL(sys_ni_syscall)		/* was sys_prof */
-/* 45 */	CALL(sys_brk)
-		CALL(sys_setgid16)
-		CALL(sys_getgid16)
-		CALL(sys_ni_syscall)		/* was sys_signal */
-		CALL(sys_geteuid16)
-/* 50 */	CALL(sys_getegid16)
-		CALL(sys_acct)
-		CALL(sys_umount)
-		CALL(sys_ni_syscall)		/* was sys_lock */
-		CALL(sys_ioctl)
-/* 55 */	CALL(sys_fcntl)
-		CALL(sys_ni_syscall)		/* was sys_mpx */
-		CALL(sys_setpgid)
-		CALL(sys_ni_syscall)		/* was sys_ulimit */
-		CALL(sys_ni_syscall)		/* was sys_olduname */
-/* 60 */	CALL(sys_umask)
-		CALL(sys_chroot)
-		CALL(sys_ustat)
-		CALL(sys_dup2)
-		CALL(sys_getppid)
-/* 65 */	CALL(sys_getpgrp)
-		CALL(sys_setsid)
-		CALL(sys_sigaction)
-		CALL(sys_ni_syscall)		/* was sys_sgetmask */
-		CALL(sys_ni_syscall)		/* was sys_ssetmask */
-/* 70 */	CALL(sys_setreuid16)
-		CALL(sys_setregid16)
-		CALL(sys_sigsuspend)
-		CALL(sys_sigpending)
-		CALL(sys_sethostname)
-/* 75 */	CALL(sys_setrlimit)
-		CALL(OBSOLETE(sys_old_getrlimit)) /* used by libc4 */
-		CALL(sys_getrusage)
-		CALL(sys_gettimeofday)
-		CALL(sys_settimeofday)
-/* 80 */	CALL(sys_getgroups16)
-		CALL(sys_setgroups16)
-		CALL(OBSOLETE(sys_old_select))	/* used by libc4 */
-		CALL(sys_symlink)
-		CALL(sys_ni_syscall)		/* was sys_lstat */
-/* 85 */	CALL(sys_readlink)
-		CALL(sys_uselib)
-		CALL(sys_swapon)
-		CALL(sys_reboot)
-		CALL(OBSOLETE(sys_old_readdir))	/* used by libc4 */
-/* 90 */	CALL(OBSOLETE(sys_old_mmap))	/* used by libc4 */
-		CALL(sys_munmap)
-		CALL(sys_truncate)
-		CALL(sys_ftruncate)
-		CALL(sys_fchmod)
-/* 95 */	CALL(sys_fchown16)
-		CALL(sys_getpriority)
-		CALL(sys_setpriority)
-		CALL(sys_ni_syscall)		/* was sys_profil */
-		CALL(sys_statfs)
-/* 100 */	CALL(sys_fstatfs)
-		CALL(sys_ni_syscall)		/* sys_ioperm */
-		CALL(OBSOLETE(ABI(sys_socketcall, sys_oabi_socketcall)))
-		CALL(sys_syslog)
-		CALL(sys_setitimer)
-/* 105 */	CALL(sys_getitimer)
-		CALL(sys_newstat)
-		CALL(sys_newlstat)
-		CALL(sys_newfstat)
-		CALL(sys_ni_syscall)		/* was sys_uname */
-/* 110 */	CALL(sys_ni_syscall)		/* was sys_iopl */
-		CALL(sys_vhangup)
-		CALL(sys_ni_syscall)
-		CALL(OBSOLETE(sys_syscall))	/* call a syscall */
-		CALL(sys_wait4)
-/* 115 */	CALL(sys_swapoff)
-		CALL(sys_sysinfo)
-		CALL(OBSOLETE(ABI(sys_ipc, sys_oabi_ipc)))
-		CALL(sys_fsync)
-		CALL(sys_sigreturn_wrapper)
-/* 120 */	CALL(sys_clone)
-		CALL(sys_setdomainname)
-		CALL(sys_newuname)
-		CALL(sys_ni_syscall)		/* modify_ldt */
-		CALL(sys_adjtimex)
-/* 125 */	CALL(sys_mprotect)
-		CALL(sys_sigprocmask)
-		CALL(sys_ni_syscall)		/* was sys_create_module */
-		CALL(sys_init_module)
-		CALL(sys_delete_module)
-/* 130 */	CALL(sys_ni_syscall)		/* was sys_get_kernel_syms */
-		CALL(sys_quotactl)
-		CALL(sys_getpgid)
-		CALL(sys_fchdir)
-		CALL(sys_bdflush)
-/* 135 */	CALL(sys_sysfs)
-		CALL(sys_personality)
-		CALL(sys_ni_syscall)		/* reserved for afs_syscall */
-		CALL(sys_setfsuid16)
-		CALL(sys_setfsgid16)
-/* 140 */	CALL(sys_llseek)
-		CALL(sys_getdents)
-		CALL(sys_select)
-		CALL(sys_flock)
-		CALL(sys_msync)
-/* 145 */	CALL(sys_readv)
-		CALL(sys_writev)
-		CALL(sys_getsid)
-		CALL(sys_fdatasync)
-		CALL(sys_sysctl)
-/* 150 */	CALL(sys_mlock)
-		CALL(sys_munlock)
-		CALL(sys_mlockall)
-		CALL(sys_munlockall)
-		CALL(sys_sched_setparam)
-/* 155 */	CALL(sys_sched_getparam)
-		CALL(sys_sched_setscheduler)
-		CALL(sys_sched_getscheduler)
-		CALL(sys_sched_yield)
-		CALL(sys_sched_get_priority_max)
-/* 160 */	CALL(sys_sched_get_priority_min)
-		CALL(sys_sched_rr_get_interval)
-		CALL(sys_nanosleep)
-		CALL(sys_mremap)
-		CALL(sys_setresuid16)
-/* 165 */	CALL(sys_getresuid16)
-		CALL(sys_ni_syscall)		/* vm86 */
-		CALL(sys_ni_syscall)		/* was sys_query_module */
-		CALL(sys_poll)
-		CALL(sys_ni_syscall)		/* was nfsservctl */
-/* 170 */	CALL(sys_setresgid16)
-		CALL(sys_getresgid16)
-		CALL(sys_prctl)
-		CALL(sys_rt_sigreturn_wrapper)
-		CALL(sys_rt_sigaction)
-/* 175 */	CALL(sys_rt_sigprocmask)
-		CALL(sys_rt_sigpending)
-		CALL(sys_rt_sigtimedwait)
-		CALL(sys_rt_sigqueueinfo)
-		CALL(sys_rt_sigsuspend)
-/* 180 */	CALL(ABI(sys_pread64, sys_oabi_pread64))
-		CALL(ABI(sys_pwrite64, sys_oabi_pwrite64))
-		CALL(sys_chown16)
-		CALL(sys_getcwd)
-		CALL(sys_capget)
-/* 185 */	CALL(sys_capset)
-		CALL(sys_sigaltstack)
-		CALL(sys_sendfile)
-		CALL(sys_ni_syscall)		/* getpmsg */
-		CALL(sys_ni_syscall)		/* putpmsg */
-/* 190 */	CALL(sys_vfork)
-		CALL(sys_getrlimit)
-		CALL(sys_mmap2)
-		CALL(ABI(sys_truncate64, sys_oabi_truncate64))
-		CALL(ABI(sys_ftruncate64, sys_oabi_ftruncate64))
-/* 195 */	CALL(ABI(sys_stat64, sys_oabi_stat64))
-		CALL(ABI(sys_lstat64, sys_oabi_lstat64))
-		CALL(ABI(sys_fstat64, sys_oabi_fstat64))
-		CALL(sys_lchown)
-		CALL(sys_getuid)
-/* 200 */	CALL(sys_getgid)
-		CALL(sys_geteuid)
-		CALL(sys_getegid)
-		CALL(sys_setreuid)
-		CALL(sys_setregid)
-/* 205 */	CALL(sys_getgroups)
-		CALL(sys_setgroups)
-		CALL(sys_fchown)
-		CALL(sys_setresuid)
-		CALL(sys_getresuid)
-/* 210 */	CALL(sys_setresgid)
-		CALL(sys_getresgid)
-		CALL(sys_chown)
-		CALL(sys_setuid)
-		CALL(sys_setgid)
-/* 215 */	CALL(sys_setfsuid)
-		CALL(sys_setfsgid)
-		CALL(sys_getdents64)
-		CALL(sys_pivot_root)
-		CALL(sys_mincore)
-/* 220 */	CALL(sys_madvise)
-		CALL(ABI(sys_fcntl64, sys_oabi_fcntl64))
-		CALL(sys_ni_syscall) /* TUX */
-		CALL(sys_ni_syscall)
-		CALL(sys_gettid)
-/* 225 */	CALL(ABI(sys_readahead, sys_oabi_readahead))
-		CALL(sys_setxattr)
-		CALL(sys_lsetxattr)
-		CALL(sys_fsetxattr)
-		CALL(sys_getxattr)
-/* 230 */	CALL(sys_lgetxattr)
-		CALL(sys_fgetxattr)
-		CALL(sys_listxattr)
-		CALL(sys_llistxattr)
-		CALL(sys_flistxattr)
-/* 235 */	CALL(sys_removexattr)
-		CALL(sys_lremovexattr)
-		CALL(sys_fremovexattr)
-		CALL(sys_tkill)
-		CALL(sys_sendfile64)
-/* 240 */	CALL(sys_futex)
-		CALL(sys_sched_setaffinity)
-		CALL(sys_sched_getaffinity)
-		CALL(sys_io_setup)
-		CALL(sys_io_destroy)
-/* 245 */	CALL(sys_io_getevents)
-		CALL(sys_io_submit)
-		CALL(sys_io_cancel)
-		CALL(sys_exit_group)
-		CALL(sys_lookup_dcookie)
-/* 250 */	CALL(sys_epoll_create)
-		CALL(ABI(sys_epoll_ctl, sys_oabi_epoll_ctl))
-		CALL(ABI(sys_epoll_wait, sys_oabi_epoll_wait))
-		CALL(sys_remap_file_pages)
-		CALL(sys_ni_syscall)	/* sys_set_thread_area */
-/* 255 */	CALL(sys_ni_syscall)	/* sys_get_thread_area */
-		CALL(sys_set_tid_address)
-		CALL(sys_timer_create)
-		CALL(sys_timer_settime)
-		CALL(sys_timer_gettime)
-/* 260 */	CALL(sys_timer_getoverrun)
-		CALL(sys_timer_delete)
-		CALL(sys_clock_settime)
-		CALL(sys_clock_gettime)
-		CALL(sys_clock_getres)
-/* 265 */	CALL(sys_clock_nanosleep)
-		CALL(sys_statfs64_wrapper)
-		CALL(sys_fstatfs64_wrapper)
-		CALL(sys_tgkill)
-		CALL(sys_utimes)
-/* 270 */	CALL(sys_arm_fadvise64_64)
-		CALL(sys_pciconfig_iobase)
-		CALL(sys_pciconfig_read)
-		CALL(sys_pciconfig_write)
-		CALL(sys_mq_open)
-/* 275 */	CALL(sys_mq_unlink)
-		CALL(sys_mq_timedsend)
-		CALL(sys_mq_timedreceive)
-		CALL(sys_mq_notify)
-		CALL(sys_mq_getsetattr)
-/* 280 */	CALL(sys_waitid)
-		CALL(sys_socket)
-		CALL(ABI(sys_bind, sys_oabi_bind))
-		CALL(ABI(sys_connect, sys_oabi_connect))
-		CALL(sys_listen)
-/* 285 */	CALL(sys_accept)
-		CALL(sys_getsockname)
-		CALL(sys_getpeername)
-		CALL(sys_socketpair)
-		CALL(sys_send)
-/* 290 */	CALL(ABI(sys_sendto, sys_oabi_sendto))
-		CALL(sys_recv)
-		CALL(sys_recvfrom)
-		CALL(sys_shutdown)
-		CALL(sys_setsockopt)
-/* 295 */	CALL(sys_getsockopt)
-		CALL(ABI(sys_sendmsg, sys_oabi_sendmsg))
-		CALL(sys_recvmsg)
-		CALL(ABI(sys_semop, sys_oabi_semop))
-		CALL(sys_semget)
-/* 300 */	CALL(sys_semctl)
-		CALL(sys_msgsnd)
-		CALL(sys_msgrcv)
-		CALL(sys_msgget)
-		CALL(sys_msgctl)
-/* 305 */	CALL(sys_shmat)
-		CALL(sys_shmdt)
-		CALL(sys_shmget)
-		CALL(sys_shmctl)
-		CALL(sys_add_key)
-/* 310 */	CALL(sys_request_key)
-		CALL(sys_keyctl)
-		CALL(ABI(sys_semtimedop, sys_oabi_semtimedop))
-/* vserver */	CALL(sys_ni_syscall)
-		CALL(sys_ioprio_set)
-/* 315 */	CALL(sys_ioprio_get)
-		CALL(sys_inotify_init)
-		CALL(sys_inotify_add_watch)
-		CALL(sys_inotify_rm_watch)
-		CALL(sys_mbind)
-/* 320 */	CALL(sys_get_mempolicy)
-		CALL(sys_set_mempolicy)
-		CALL(sys_openat)
-		CALL(sys_mkdirat)
-		CALL(sys_mknodat)
-/* 325 */	CALL(sys_fchownat)
-		CALL(sys_futimesat)
-		CALL(ABI(sys_fstatat64,  sys_oabi_fstatat64))
-		CALL(sys_unlinkat)
-		CALL(sys_renameat)
-/* 330 */	CALL(sys_linkat)
-		CALL(sys_symlinkat)
-		CALL(sys_readlinkat)
-		CALL(sys_fchmodat)
-		CALL(sys_faccessat)
-/* 335 */	CALL(sys_pselect6)
-		CALL(sys_ppoll)
-		CALL(sys_unshare)
-		CALL(sys_set_robust_list)
-		CALL(sys_get_robust_list)
-/* 340 */	CALL(sys_splice)
-		CALL(sys_sync_file_range2)
-		CALL(sys_tee)
-		CALL(sys_vmsplice)
-		CALL(sys_move_pages)
-/* 345 */	CALL(sys_getcpu)
-		CALL(sys_epoll_pwait)
-		CALL(sys_kexec_load)
-		CALL(sys_utimensat)
-		CALL(sys_signalfd)
-/* 350 */	CALL(sys_timerfd_create)
-		CALL(sys_eventfd)
-		CALL(sys_fallocate)
-		CALL(sys_timerfd_settime)
-		CALL(sys_timerfd_gettime)
-/* 355 */	CALL(sys_signalfd4)
-		CALL(sys_eventfd2)
-		CALL(sys_epoll_create1)
-		CALL(sys_dup3)
-		CALL(sys_pipe2)
-/* 360 */	CALL(sys_inotify_init1)
-		CALL(sys_preadv)
-		CALL(sys_pwritev)
-		CALL(sys_rt_tgsigqueueinfo)
-		CALL(sys_perf_event_open)
-/* 365 */	CALL(sys_recvmmsg)
-		CALL(sys_accept4)
-		CALL(sys_fanotify_init)
-		CALL(sys_fanotify_mark)
-		CALL(sys_prlimit64)
-/* 370 */	CALL(sys_name_to_handle_at)
-		CALL(sys_open_by_handle_at)
-		CALL(sys_clock_adjtime)
-		CALL(sys_syncfs)
-		CALL(sys_sendmmsg)
-/* 375 */	CALL(sys_setns)
-		CALL(sys_process_vm_readv)
-		CALL(sys_process_vm_writev)
-		CALL(sys_kcmp)
-		CALL(sys_finit_module)
-/* 380 */	CALL(sys_sched_setattr)
-		CALL(sys_sched_getattr)
-		CALL(sys_renameat2)
-		CALL(sys_seccomp)
-		CALL(sys_getrandom)
-/* 385 */	CALL(sys_memfd_create)
-		CALL(sys_bpf)
-		CALL(sys_execveat)
-		CALL(sys_userfaultfd)
-		CALL(sys_membarrier)
-/* 390 */	CALL(sys_mlock2)
-		CALL(sys_copy_file_range)
-		CALL(sys_preadv2)
-		CALL(sys_pwritev2)
-#ifndef syscalls_counted
-.equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
-#define syscalls_counted
-#endif
-.rept syscalls_padding
-		CALL(sys_ni_syscall)
-.endr
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 10c3283d6c19..eb5cd77bf1d8 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -12,6 +12,11 @@
 #include <asm/unistd.h>
 #include <asm/ftrace.h>
 #include <asm/unwind.h>
+#ifdef CONFIG_AEABI
+#include <asm/unistd-oabi.h>
+#endif
+
+	.equ	NR_syscalls, __NR_syscalls
 
 #ifdef CONFIG_NEED_RET_TO_USER
 #include <mach/entry-macro.S>
@@ -120,21 +125,6 @@ ENTRY(ret_from_fork)
 	b	ret_slow_syscall
 ENDPROC(ret_from_fork)
 
-	.equ NR_syscalls,0
-#define CALL(x) .equ NR_syscalls,NR_syscalls+1
-#include "calls.S"
-
-/*
- * Ensure that the system call table is equal to __NR_syscalls,
- * which is the value the rest of the system sees
- */
-.ifne NR_syscalls - __NR_syscalls
-.error "__NR_syscalls is not equal to the size of the syscall table"
-.endif
-
-#undef CALL
-#define CALL(x) .long x
-
 /*=============================================================================
  * SWI handler
  *-----------------------------------------------------------------------------
@@ -291,22 +281,48 @@ __cr_alignment:
 #endif
 	.ltorg
 
+	.macro	syscall_table_start, sym
+	.equ	__sys_nr, 0
+	.type	\sym, #object
+ENTRY(\sym)
+	.endm
+
+	.macro	syscall, nr, func
+	.ifgt	__sys_nr - \nr
+	.error	"Duplicated/unorded system call entry"
+	.endif
+	.rept	\nr - __sys_nr
+	.long	sys_ni_syscall
+	.endr
+	.long	\func
+	.equ	__sys_nr, \nr + 1
+	.endm
+
+	.macro	syscall_table_end, sym
+	.ifgt	__sys_nr - __NR_syscalls
+	.error	"System call table too big"
+	.endif
+	.rept	__NR_syscalls - __sys_nr
+	.long	sys_ni_syscall
+	.endr
+	.size	\sym, . - \sym
+	.endm
+
+#define NATIVE(nr, func) syscall nr, func
+
 /*
  * This is the syscall table declaration for native ABI syscalls.
  * With EABI a couple syscalls are obsolete and defined as sys_ni_syscall.
  */
-#define ABI(native, compat) native
+	syscall_table_start sys_call_table
+#define COMPAT(nr, native, compat) syscall nr, native
 #ifdef CONFIG_AEABI
-#define OBSOLETE(syscall) sys_ni_syscall
+#include <calls-eabi.S>
 #else
-#define OBSOLETE(syscall) syscall
+#include <calls-oabi.S>
 #endif
-
-	.type	sys_call_table, #object
-ENTRY(sys_call_table)
-#include "calls.S"
-#undef ABI
-#undef OBSOLETE
+#undef COMPAT
+	syscall_table_end sys_call_table
 
 /*============================================================================
  * Special system call wrappers
@@ -407,14 +423,10 @@ ENDPROC(sys_oabi_readahead)
  * Let's declare a second syscall table for old ABI binaries
  * using the compatibility syscall entries.
  */
-#define ABI(native, compat) compat
-#define OBSOLETE(syscall) syscall
-
-	.type	sys_oabi_call_table, #object
-ENTRY(sys_oabi_call_table)
-#include "calls.S"
-#undef ABI
-#undef OBSOLETE
+	syscall_table_start sys_oabi_call_table
+#define COMPAT(nr, native, compat) syscall nr, compat
+#include <calls-oabi.S>
+	syscall_table_end sys_oabi_call_table
 
 #endif