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Subject[PATCH 3/4] m68k: Added system call table generation support
Date
The system call tables are in different format in all
architecture and it will be difficult to manually add or
modify the system calls in the respective files. To make
it easy by keeping a script and which'll generate the
header file and syscall table file so this change will
unify them across all architectures.

The system call table generation script is added in
syscalls directory which contain the script to generate
both uapi header file system call table generation file
and syscall.tbl file which'll be the input for the scripts.

syscall.tbl contains the list of available system calls
along with system call number and corresponding entry point.
Add a new system call in this architecture will be possible
by adding new entry in the syscall.tbl file.

Adding a new table entry consisting of:
- System call number.
- ABI.
- System call name.
- Entry point name.

syscallhdr.sh and syscalltbl.sh will generate uapi header-
unistd.h and syscall_table.h files respectively. File
syscall_table.h is included by syscall.S - the real system
call table. Both .sh files will parse the content syscall.tbl
to generate the header and table files.

ARM, s390 and x86 architecuture does have the similar support.
I leverage their implementation to come up with a generic
solution. And this is the ground work for y2038 issue. We need
to change 52 system call implementation and this work will
reduce the effort by simply modify 52 entries in syscall.tbl.

Signed-off-by: Firoz Khan <firoz.khan@linaro.org>
---
arch/m68k/kernel/syscalls/Makefile | 37 +++
arch/m68k/kernel/syscalls/syscall.tbl | 386 ++++++++++++++++++++++++++++++++
arch/m68k/kernel/syscalls/syscallhdr.sh | 33 +++
arch/m68k/kernel/syscalls/syscalltbl.sh | 28 +++
4 files changed, 484 insertions(+)
create mode 100644 arch/m68k/kernel/syscalls/Makefile
create mode 100644 arch/m68k/kernel/syscalls/syscall.tbl
create mode 100644 arch/m68k/kernel/syscalls/syscallhdr.sh
create mode 100644 arch/m68k/kernel/syscalls/syscalltbl.sh

diff --git a/arch/m68k/kernel/syscalls/Makefile b/arch/m68k/kernel/syscalls/Makefile
new file mode 100644
index 0000000..7624044
--- /dev/null
+++ b/arch/m68k/kernel/syscalls/Makefile
@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: GPL-2.0
+out := arch/$(SRCARCH)/include/generated/asm
+uapi := arch/$(SRCARCH)/include/generated/uapi/asm
+
+_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
+ $(shell [ -d '$(out)' ] || mkdir -p '$(out)')
+
+syscall := $(srctree)/$(src)/syscall.tbl
+
+syshdr := $(srctree)/$(src)/syscallhdr.sh
+systbl := $(srctree)/$(src)/syscalltbl.sh
+
+quiet_cmd_syshdr = SYSHDR $@
+ cmd_syshdr = $(CONFIG_SHELL) '$(syshdr)' '$<' '$@' \
+ '$(syshdr_abi_$(basetarget))' \
+ '$(syshdr_pfx_$(basetarget))' \
+ '$(syshdr_offset_$(basetarget))'
+
+quiet_cmd_systbl = SYSTBL $@
+ cmd_systbl = $(CONFIG_SHELL) '$(systbl)' '$<' '$@' \
+ '$(systbl_abi_$(basetarget))'
+
+$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+ $(call if_changed,syshdr)
+
+$(out)/syscall_table.h: $(syscall) $(systbl)
+ $(call if_changed,systbl)
+
+uapisyshdr-y += unistd_32.h
+syshdr-y += syscall_table.h
+
+targets += $(uapisyshdr-y) $(syshdr-y)
+
+PHONY += all
+all: $(addprefix $(uapi)/,$(uapisyshdr-y))
+all: $(addprefix $(out)/,$(syshdr-y))
+ @:
diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl
new file mode 100644
index 0000000..00a44ba
--- /dev/null
+++ b/arch/m68k/kernel/syscalls/syscall.tbl
@@ -0,0 +1,386 @@
+#
+# Linux system call numbers and entry vectors
+#
+# The format is:
+# <number> <abi> <name> <entry point>
+#
+# The abi is always common for this file.
+#
+0 common restart_syscall sys_restart_syscall
+1 common exit sys_exit
+2 common fork __sys_fork
+3 common read sys_read
+4 common write sys_write
+5 common open sys_open
+6 common close sys_close
+7 common waitpid sys_waitpid
+8 common creat sys_creat
+9 common link sys_link
+10 common unlink sys_unlink
+11 common execve sys_execve
+12 common chdir sys_chdir
+13 common time sys_time
+14 common mknod sys_mknod
+15 common chmod sys_chmod
+16 common chown sys_chown16
+17 common break sys_ni_syscall
+18 common oldstat sys_stat
+19 common lseek sys_lseek
+20 common getpid sys_getpid
+21 common mount sys_mount
+22 common umount sys_oldumount
+23 common setuid sys_setuid16
+24 common getuid sys_getuid16
+25 common stime sys_stime
+26 common ptrace sys_ptrace
+27 common alarm sys_alarm
+28 common oldfstat sys_fstat
+29 common pause sys_pause
+30 common utime sys_utime
+31 common stty sys_ni_syscall
+32 common gtty sys_ni_syscall
+33 common access sys_access
+34 common nice sys_nice
+35 common ftime sys_ni_syscall
+36 common sync sys_sync
+37 common kill sys_kill
+38 common rename sys_rename
+39 common mkdir sys_mkdir
+40 common rmdir sys_rmdir
+41 common dup sys_dup
+42 common pipe sys_pipe
+43 common times sys_times
+44 common prof sys_ni_syscall
+45 common brk sys_brk
+46 common setgid sys_setgid16
+47 common getgid sys_getgid16
+48 common signal sys_signal
+49 common geteuid sys_geteuid16
+50 common getegid sys_getegid16
+51 common acct sys_acct
+52 common umount2 sys_umount
+53 common lock sys_ni_syscall
+54 common ioctl sys_ioctl
+55 common fcntl sys_fcntl
+56 common mpx sys_ni_syscall
+57 common setpgid sys_setpgid
+58 common ulimit sys_ni_syscall
+59 common oldolduname sys_ni_syscall
+60 common umask sys_umask
+61 common chroot sys_chroot
+62 common ustat sys_ustat
+63 common dup2 sys_dup2
+64 common getppid sys_getppid
+65 common getpgrp sys_getpgrp
+66 common setsid sys_setsid
+67 common sigaction sys_sigaction
+68 common sgetmask sys_sgetmask
+69 common ssetmask sys_ssetmask
+70 common setreuid sys_setreuid16
+71 common setregid sys_setregid16
+72 common sigsuspend sys_sigsuspend
+73 common sigpending sys_sigpending
+74 common sethostname sys_sethostname
+75 common setrlimit sys_setrlimit
+76 common getrlimit sys_old_getrlimit
+77 common getrusage sys_getrusage
+78 common gettimeofday sys_gettimeofday
+79 common settimeofday sys_settimeofday
+80 common getgroups sys_getgroups16
+81 common setgroups sys_setgroups16
+82 common select sys_old_select
+83 common symlink sys_symlink
+84 common oldlstat sys_lstat
+85 common readlink sys_readlink
+86 common uselib sys_uselib
+87 common swapon sys_swapon
+88 common reboot sys_reboot
+89 common readdir sys_old_readdir
+90 common mmap sys_old_mmap
+91 common munmap sys_munmap
+92 common truncate sys_truncate
+93 common ftruncate sys_ftruncate
+94 common fchmod sys_fchmod
+95 common fchown sys_fchown16
+96 common getpriority sys_getpriority
+97 common setpriority sys_setpriority
+98 common profil sys_ni_syscall
+99 common statfs sys_statfs
+100 common fstatfs sys_fstatfs
+101 common ioperm sys_ni_syscall
+102 common socketcall sys_socketcall
+103 common syslog sys_syslog
+104 common setitimer sys_setitimer
+105 common getitimer sys_getitimer
+106 common stat sys_newstat
+107 common lstat sys_newlstat
+108 common fstat sys_newfstat
+109 common olduname sys_ni_syscall
+110 common iopl sys_ni_syscall
+111 common vhangup sys_vhangup
+112 common idle sys_ni_syscall
+113 common vm86 sys_ni_syscall
+114 common wait4 sys_wait4
+115 common swapoff sys_swapoff
+116 common sysinfo sys_sysinfo
+117 common ipc sys_ipc
+118 common fsync sys_fsync
+119 common sigreturn sys_sigreturn
+120 common clone __sys_clone
+121 common setdomainname sys_setdomainname
+122 common uname sys_newuname
+123 common cacheflush sys_cacheflush
+124 common adjtimex sys_adjtimex
+125 common mprotect sys_mprotect
+126 common sigprocmask sys_sigprocmask
+127 common create_module sys_ni_syscall
+128 common init_module sys_init_module
+129 common delete_module sys_delete_module
+130 common get_kernel_syms sys_ni_syscall
+131 common quotactl sys_quotactl
+132 common getpgid sys_getpgid
+133 common fchdir sys_fchdir
+134 common bdflush sys_bdflush
+135 common sysfs sys_sysfs
+136 common personality sys_personality
+137 common afs_syscall sys_ni_syscall
+138 common setfsuid sys_setfsuid16
+139 common setfsgid sys_setfsgid16
+140 common _llseek sys_llseek
+141 common getdents sys_getdents
+142 common _newselect sys_select
+143 common flock sys_flock
+144 common msync sys_msync
+145 common readv sys_readv
+146 common writev sys_writev
+147 common getsid sys_getsid
+148 common fdatasync sys_fdatasync
+149 common _sysctl sys_sysctl
+150 common mlock sys_mlock
+151 common munlock sys_munlock
+152 common mlockall sys_mlockall
+153 common munlockall sys_munlockall
+154 common sched_setparam sys_sched_setparam
+155 common sched_getparam sys_sched_getparam
+156 common sched_setscheduler sys_sched_setscheduler
+157 common sched_getscheduler sys_sched_getscheduler
+158 common sched_yield sys_sched_yield
+159 common sched_get_priority_max sys_sched_get_priority_max
+160 common sched_get_priority_min sys_sched_get_priority_min
+161 common sched_rr_get_interval sys_sched_rr_get_interval
+162 common nanosleep sys_nanosleep
+163 common mremap sys_mremap
+164 common setresuid sys_setresuid16
+165 common getresuid sys_getresuid16
+166 common getpagesize sys_getpagesize
+167 common query_module sys_ni_syscall
+168 common poll sys_poll
+169 common nfsservctl sys_ni_syscall
+170 common setresgid sys_setresgid16
+171 common getresgid sys_getresgid16
+172 common prctl sys_prctl
+173 common rt_sigreturn sys_rt_sigreturn
+174 common rt_sigaction sys_rt_sigaction
+175 common rt_sigprocmask sys_rt_sigprocmask
+176 common rt_sigpending sys_rt_sigpending
+177 common rt_sigtimedwait sys_rt_sigtimedwait
+178 common rt_sigqueueinfo sys_rt_sigqueueinfo
+179 common rt_sigsuspend sys_rt_sigsuspend
+180 common pread64 sys_pread64
+181 common pwrite64 sys_pwrite64
+182 common lchown sys_lchown16
+183 common getcwd sys_getcwd
+184 common capget sys_capget
+185 common capset sys_capset
+186 common sigaltstack sys_sigaltstack
+187 common sendfile sys_sendfile
+188 common getpmsg sys_ni_syscall
+189 common putpmsg sys_ni_syscall
+190 common vfork __sys_vfork
+191 common ugetrlimit sys_getrlimit
+192 common mmap2 sys_mmap2
+193 common truncate64 sys_truncate64
+194 common ftruncate64 sys_ftruncate64
+195 common stat64 sys_stat64
+196 common lstat64 sys_lstat64
+197 common fstat64 sys_fstat64
+198 common chown32 sys_chown
+199 common getuid32 sys_getuid
+200 common getgid32 sys_getgid
+201 common geteuid32 sys_geteuid
+202 common getegid32 sys_getegid
+203 common setreuid32 sys_setreuid
+204 common setregid32 sys_setregid
+205 common getgroups32 sys_getgroups
+206 common setgroups32 sys_setgroups
+207 common fchown32 sys_fchown
+208 common setresuid32 sys_setresuid
+209 common getresuid32 sys_getresuid
+210 common setresgid32 sys_setresgid
+211 common getresgid32 sys_getresgid
+212 common lchown32 sys_lchown
+213 common setuid32 sys_setuid
+214 common setgid32 sys_setgid
+215 common setfsuid32 sys_setfsuid
+216 common setfsgid32 sys_setfsgid
+217 common pivot_root sys_pivot_root
+220 common getdents64 sys_getdents64
+221 common gettid sys_gettid
+222 common tkill sys_tkill
+223 common setxattr sys_setxattr
+224 common lsetxattr sys_lsetxattr
+225 common fsetxattr sys_fsetxattr
+226 common getxattr sys_getxattr
+227 common lgetxattr sys_lgetxattr
+228 common fgetxattr sys_fgetxattr
+229 common listxattr sys_listxattr
+230 common llistxattr sys_llistxattr
+231 common flistxattr sys_flistxattr
+232 common removexattr sys_removexattr
+233 common lremovexattr sys_lremovexattr
+234 common fremovexattr sys_fremovexattr
+235 common futex sys_futex
+236 common sendfile64 sys_sendfile64
+237 common mincore sys_mincore
+238 common madvise sys_madvise
+239 common fcntl64 sys_fcntl64
+240 common readahead sys_readahead
+241 common io_setup sys_io_setup
+242 common io_destroy sys_io_destroy
+243 common io_getevents sys_io_getevents
+244 common io_submit sys_io_submit
+245 common io_cancel sys_io_cancel
+246 common fadvise64 sys_fadvise64
+247 common exit_group sys_exit_group
+248 common lookup_dcookie sys_lookup_dcookie
+249 common epoll_create sys_epoll_create
+250 common epoll_ctl sys_epoll_ctl
+251 common epoll_wait sys_epoll_wait
+252 common remap_file_pages sys_remap_file_pages
+253 common set_tid_address sys_set_tid_address
+254 common timer_create sys_timer_create
+255 common timer_settime sys_timer_settime
+256 common timer_gettime sys_timer_gettime
+257 common timer_getoverrun sys_timer_getoverrun
+258 common timer_delete sys_timer_delete
+259 common clock_settime sys_clock_settime
+260 common clock_gettime sys_clock_gettime
+261 common clock_getres sys_clock_getres
+262 common clock_nanosleep sys_clock_nanosleep
+263 common statfs64 sys_statfs64
+264 common fstatfs64 sys_fstatfs64
+265 common tgkill sys_tgkill
+266 common utimes sys_utimes
+267 common fadvise64_64 sys_fadvise64_64
+268 common mbind sys_mbind
+269 common get_mempolicy sys_get_mempolicy
+270 common set_mempolicy sys_set_mempolicy
+271 common mq_open sys_mq_open
+272 common mq_unlink sys_mq_unlink
+273 common mq_timedsend sys_mq_timedsend
+274 common mq_timedreceive sys_mq_timedreceive
+275 common mq_notify sys_mq_notify
+276 common mq_getsetattr sys_mq_getsetattr
+277 common waitid sys_waitid
+278 common vserver sys_ni_syscall
+279 common add_key sys_add_key
+280 common request_key sys_request_key
+281 common keyctl sys_keyctl
+282 common ioprio_set sys_ioprio_set
+283 common ioprio_get sys_ioprio_get
+284 common inotify_init sys_inotify_init
+285 common inotify_add_watch sys_inotify_add_watch
+286 common inotify_rm_watch sys_inotify_rm_watch
+287 common migrate_pages sys_migrate_pages
+288 common openat sys_openat
+289 common mkdirat sys_mkdirat
+290 common mknodat sys_mknodat
+291 common fchownat sys_fchownat
+292 common futimesat sys_futimesat
+293 common fstatat64 sys_fstatat64
+294 common unlinkat sys_unlinkat
+295 common renameat sys_renameat
+296 common linkat sys_linkat
+297 common symlinkat sys_symlinkat
+298 common readlinkat sys_readlinkat
+299 common fchmodat sys_fchmodat
+300 common faccessat sys_faccessat
+301 common pselect6 sys_pselect6
+302 common ppoll sys_ppoll
+303 common unshare sys_unshare
+304 common set_robust_list sys_set_robust_list
+305 common get_robust_list sys_get_robust_list
+306 common splice sys_splice
+307 common sync_file_range sys_sync_file_range
+308 common tee sys_tee
+309 common vmsplice sys_vmsplice
+310 common move_pages sys_move_pages
+311 common sched_setaffinity sys_sched_setaffinity
+312 common sched_getaffinity sys_sched_getaffinity
+313 common kexec_load sys_kexec_load
+314 common getcpu sys_getcpu
+315 common epoll_pwait sys_epoll_pwait
+316 common utimensat sys_utimensat
+317 common signalfd sys_signalfd
+318 common timerfd_create sys_timerfd_create
+319 common eventfd sys_eventfd
+320 common fallocate sys_fallocate
+321 common timerfd_settime sys_timerfd_settime
+322 common timerfd_gettime sys_timerfd_gettime
+323 common signalfd4 sys_signalfd4
+324 common eventfd2 sys_eventfd2
+325 common epoll_create1 sys_epoll_create1
+326 common dup3 sys_dup3
+327 common pipe2 sys_pipe2
+328 common inotify_init1 sys_inotify_init1
+329 common preadv sys_preadv
+330 common pwritev sys_pwritev
+331 common rt_tgsigqueueinfo sys_rt_tgsigqueueinfo
+332 common perf_event_open sys_perf_event_open
+333 common get_thread_area sys_get_thread_area
+334 common set_thread_area sys_set_thread_area
+335 common atomic_cmpxchg_32 sys_atomic_cmpxchg_32
+336 common atomic_barrier sys_atomic_barrier
+337 common fanotify_init sys_fanotify_init
+338 common fanotify_mark sys_fanotify_mark
+339 common prlimit64 sys_prlimit64
+340 common name_to_handle_at sys_name_to_handle_at
+341 common open_by_handle_at sys_open_by_handle_at
+342 common clock_adjtime sys_clock_adjtime
+343 common syncfs sys_syncfs
+344 common setns sys_setns
+345 common process_vm_readv sys_process_vm_readv
+346 common process_vm_writev sys_process_vm_writev
+347 common kcmp sys_kcmp
+348 common finit_module sys_finit_module
+349 common sched_setattr sys_sched_setattr
+350 common sched_getattr sys_sched_getattr
+351 common renameat2 sys_renameat2
+352 common getrandom sys_getrandom
+353 common memfd_create sys_memfd_create
+354 common bpf sys_bpf
+355 common execveat sys_execveat
+356 common socket sys_socket
+357 common socketpair sys_socketpair
+358 common bind sys_bind
+359 common connect sys_connect
+360 common listen sys_listen
+361 common accept4 sys_accept4
+362 common getsockopt sys_getsockopt
+363 common setsockopt sys_setsockopt
+364 common getsockname sys_getsockname
+365 common getpeername sys_getpeername
+366 common sendto sys_sendto
+367 common sendmsg sys_sendmsg
+368 common recvfrom sys_recvfrom
+369 common recvmsg sys_recvmsg
+370 common shutdown sys_shutdown
+371 common recvmmsg sys_recvmmsg
+372 common sendmmsg sys_sendmmsg
+373 common userfaultfd sys_userfaultfd
+374 common membarrier sys_membarrier
+375 common mlock2 sys_mlock2
+376 common copy_file_range sys_copy_file_range
+377 common preadv2 sys_preadv2
+378 common pwritev2 sys_pwritev2
+379 common statx sys_statx
diff --git a/arch/m68k/kernel/syscalls/syscallhdr.sh b/arch/m68k/kernel/syscalls/syscallhdr.sh
new file mode 100644
index 0000000..f9db7f5
--- /dev/null
+++ b/arch/m68k/kernel/syscalls/syscallhdr.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+in="$1"
+out="$2"
+my_abis=`echo "($3)" | tr ',' '|'`
+prefix="$4"
+offset="$5"
+
+fileguard=_UAPI_ASM_M68K_`basename "$out" | sed \
+ -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
+ -e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g'`_
+grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | (
+ echo "#ifndef ${fileguard}"
+ echo "#define ${fileguard}"
+ echo ""
+
+ nxt=0
+ while read nr abi name entry ; do
+ if [ -z "$offset" ]; then
+ echo -e "#define __NR_${prefix}${name}\t$nr"
+ else
+ echo -e "#define __NR_${prefix}${name}\t($offset + $nr)"
+ fi
+ nxt=$nr
+ let nxt=nxt+1
+ done
+
+ echo ""
+ echo -e "#define __NR_syscalls\t$nxt"
+ echo ""
+ echo "#endif /* ${fileguard} */"
+) > "$out"
diff --git a/arch/m68k/kernel/syscalls/syscalltbl.sh b/arch/m68k/kernel/syscalls/syscalltbl.sh
new file mode 100644
index 0000000..8121a05
--- /dev/null
+++ b/arch/m68k/kernel/syscalls/syscalltbl.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+in="$1"
+out="$2"
+my_abi="$3"
+
+emit() {
+ nxt="$1"
+ nr="$2"
+ entry="$3"
+
+ while [ $nxt -lt $nr ]; do
+ echo "__SYSCALL($nxt, sys_ni_syscall, )"
+ let nxt=nxt+1
+ done
+
+ echo "__SYSCALL($nr, $entry, )"
+}
+
+grep '^[0-9]' "$in" | sort -n | (
+ nxt=0
+ while read nr abi name entry ; do
+ emit $nxt $nr $entry
+ nxt=$nr
+ let nxt=nxt+1
+ done
+) > "$out"
--
1.9.1
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