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Subject[PATCH 4/5] ia64: 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/ia64/kernel/syscalls/Makefile | 40 ++++
arch/ia64/kernel/syscalls/syscall.tbl | 334 ++++++++++++++++++++++++++++++++
arch/ia64/kernel/syscalls/syscallhdr.sh | 33 ++++
arch/ia64/kernel/syscalls/syscalltbl.sh | 34 ++++
4 files changed, 441 insertions(+)
create mode 100644 arch/ia64/kernel/syscalls/Makefile
create mode 100644 arch/ia64/kernel/syscalls/syscall.tbl
create mode 100644 arch/ia64/kernel/syscalls/syscallhdr.sh
create mode 100644 arch/ia64/kernel/syscalls/syscalltbl.sh

diff --git a/arch/ia64/kernel/syscalls/Makefile b/arch/ia64/kernel/syscalls/Makefile
new file mode 100644
index 0000000..ddb26c0
--- /dev/null
+++ b/arch/ia64/kernel/syscalls/Makefile
@@ -0,0 +1,40 @@
+# 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))' \
+ '$(systbl_offset_$(basetarget))'
+
+syshdr_offset_unistd := __NR_Linux
+$(uapi)/unistd_64.h: $(syscall) $(syshdr)
+ $(call if_changed,syshdr)
+
+systbl_offset_syscall_table := 1024
+$(out)/syscall_table.h: $(syscall) $(systbl)
+ $(call if_changed,systbl)
+
+uapisyshdr-y += unistd_64.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/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl
new file mode 100644
index 0000000..bef7184
--- /dev/null
+++ b/arch/ia64/kernel/syscalls/syscall.tbl
@@ -0,0 +1,334 @@
+#
+# 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 ni_syscall sys_ni_syscall
+1 common exit sys_exit
+2 common read sys_read
+3 common write sys_write
+4 common open sys_open
+5 common close sys_close
+6 common creat sys_creat
+7 common link sys_link
+8 common unlink sys_unlink
+9 common execve ia64_execve
+10 common chdir sys_chdir
+11 common fchdir sys_fchdir
+12 common utimes sys_utimes
+13 common mknod sys_mknod
+14 common chmod sys_chmod
+15 common chown sys_chown
+16 common lseek sys_lseek
+17 common getpid sys_getpid
+18 common getppid sys_getppid
+19 common mount sys_mount
+20 common umount sys_umount
+21 common setuid sys_setuid
+22 common getuid sys_getuid
+23 common geteuid sys_geteuid
+24 common ptrace sys_ptrace
+25 common access sys_access
+26 common sync sys_sync
+27 common fsync sys_fsync
+28 common fdatasync sys_fdatasync
+29 common kill sys_kill
+30 common rename sys_rename
+31 common mkdir sys_mkdir
+32 common rmdir sys_rmdir
+33 common dup sys_dup
+34 common pipe sys_ia64_pipe
+35 common times sys_times
+36 common brk ia64_brk
+37 common setgid sys_setgid
+38 common getgid sys_getgid
+39 common getegid sys_getegid
+40 common acct sys_acct
+41 common ioctl sys_ioctl
+42 common fcntl sys_fcntl
+43 common umask sys_umask
+44 common chroot sys_chroot
+45 common ustat sys_ustat
+46 common dup2 sys_dup2
+47 common setreuid sys_setreuid
+48 common setregid sys_setregid
+49 common getresuid sys_getresuid
+50 common setresuid sys_setresuid
+51 common getresgid sys_getresgid
+52 common setresgid sys_setresgid
+53 common getgroups sys_getgroups
+54 common setgroups sys_setgroups
+55 common getpgid sys_getpgid
+56 common setpgid sys_setpgid
+57 common setsid sys_setsid
+58 common getsid sys_getsid
+59 common sethostname sys_sethostname
+60 common setrlimit sys_setrlimit
+61 common getrlimit sys_getrlimit
+62 common getrusage sys_getrusage
+63 common gettimeofday sys_gettimeofday
+64 common settimeofday sys_settimeofday
+65 common select sys_select
+66 common poll sys_poll
+67 common symlink sys_symlink
+68 common readlink sys_readlink
+69 common uselib sys_uselib
+70 common swapon sys_swapon
+71 common swapoff sys_swapoff
+72 common reboot sys_reboot
+73 common truncate sys_truncate
+74 common ftruncate sys_ftruncate
+75 common fchmod sys_fchmod
+76 common fchown sys_fchown
+77 common getpriority ia64_getpriority
+78 common setpriority sys_setpriority
+79 common statfs sys_statfs
+80 common fstatfs sys_fstatfs
+81 common gettid sys_gettid
+82 common semget sys_semget
+83 common semop sys_semop
+84 common semctl sys_semctl
+85 common msgget sys_msgget
+86 common msgsnd sys_msgsnd
+87 common msgrcv sys_msgrcv
+88 common msgctl sys_msgctl
+89 common shmget sys_shmget
+90 common shmat sys_shmat
+91 common shmdt sys_shmdt
+92 common shmctl sys_shmctl
+93 common syslog sys_syslog
+94 common setitimer sys_setitimer
+95 common getitimer sys_getitimer
+96 common old_stat sys_ni_syscall
+97 common old_lstat sys_ni_syscall
+98 common old_fstat sys_ni_syscall
+99 common vhangup sys_vhangup
+100 common lchown sys_lchown
+101 common remap_file_pages sys_remap_file_pages
+102 common wait4 sys_wait4
+103 common sysinfo sys_sysinfo
+104 common clone sys_clone
+105 common setdomainname sys_setdomainname
+106 common uname sys_newuname
+107 common adjtimex sys_adjtimex
+108 common create_module sys_ni_syscall
+109 common init_module sys_init_module
+110 common delete_module sys_delete_module
+111 common get_kernel_syms sys_ni_syscall
+112 common query_module sys_ni_syscall
+113 common quotactl sys_quotactl
+114 common bdflush sys_bdflush
+115 common sysfs sys_sysfs
+116 common personality sys_personality
+117 common afs_syscall sys_ni_syscall
+118 common setfsuid sys_setfsuid
+119 common setfsgid sys_setfsgid
+120 common getdents sys_getdents
+121 common flock sys_flock
+122 common readv sys_readv
+123 common writev sys_writev
+124 common pread64 sys_pread64
+125 common pwrite64 sys_pwrite64
+126 common _sysctl sys_sysctl
+127 common mmap sys_mmap
+128 common munmap sys_munmap
+129 common mlock sys_mlock
+130 common mlockall sys_mlockall
+131 common mprotect sys_mprotect
+132 common mremap ia64_mremap
+133 common msync sys_msync
+134 common munlock sys_munlock
+135 common munlockall sys_munlockall
+136 common sched_getparam sys_sched_getparam
+137 common sched_setparam sys_sched_setparam
+138 common sched_getscheduler sys_sched_getscheduler
+139 common sched_setscheduler sys_sched_setscheduler
+140 common sched_yield sys_sched_yield
+141 common sched_get_priority_max sys_sched_get_priority_max
+142 common sched_get_priority_min sys_sched_get_priority_min
+143 common sched_rr_get_interval sys_sched_rr_get_interval
+144 common nanosleep sys_nanosleep
+145 common nfsservctl sys_ni_syscall
+146 common prctl sys_prctl
+147 common getpagesize sys_getpagesize
+148 common mmap2 sys_mmap2
+149 common pciconfig_read sys_pciconfig_read
+150 common pciconfig_write sys_pciconfig_write
+151 common perfmonctl sys_perfmonctl
+152 common sigaltstack sys_sigaltstack
+153 common rt_sigaction sys_rt_sigaction
+154 common rt_sigpending sys_rt_sigpending
+155 common rt_sigprocmask sys_rt_sigprocmask
+156 common rt_sigqueueinfo sys_rt_sigqueueinfo
+157 common rt_sigreturn sys_rt_sigreturn
+158 common rt_sigsuspend sys_rt_sigsuspend
+159 common rt_sigtimedwait sys_rt_sigtimedwait
+160 common getcwd sys_getcwd
+161 common capget sys_capget
+162 common capset sys_capset
+163 common sendfile sys_sendfile64
+164 common getpmsg sys_ni_syscall
+165 common putpmsg sys_ni_syscall
+166 common socket sys_socket
+167 common bind sys_bind
+168 common connect sys_connect
+169 common listen sys_listen
+170 common accept sys_accept
+171 common getsockname sys_getsockname
+172 common getpeername sys_getpeername
+173 common socketpair sys_socketpair
+174 common send sys_send
+175 common sendto sys_sendto
+176 common recv sys_recv
+177 common recvfrom sys_recvfrom
+178 common shutdown sys_shutdown
+179 common setsockopt sys_setsockopt
+180 common getsockopt sys_getsockopt
+181 common sendmsg sys_sendmsg
+182 common recvmsg sys_recvmsg
+183 common pivot_root sys_pivot_root
+184 common mincore sys_mincore
+185 common madvise sys_madvise
+186 common stat sys_newstat
+187 common lstat sys_newlstat
+188 common fstat sys_newfstat
+189 common clone2 sys_clone2
+190 common getdents64 sys_getdents64
+191 common getunwind sys_getunwind
+192 common readahead sys_readahead
+193 common setxattr sys_setxattr
+194 common lsetxattr sys_lsetxattr
+195 common fsetxattr sys_fsetxattr
+196 common getxattr sys_getxattr
+197 common lgetxattr sys_lgetxattr
+198 common fgetxattr sys_fgetxattr
+199 common listxattr sys_listxattr
+200 common llistxattr sys_llistxattr
+201 common flistxattr sys_flistxattr
+202 common removexattr sys_removexattr
+203 common lremovexattr sys_lremovexattr
+204 common fremovexattr sys_fremovexattr
+205 common tkill sys_tkill
+206 common futex sys_futex
+207 common sched_setaffinity sys_sched_setaffinity
+208 common sched_getaffinity sys_sched_getaffinity
+209 common set_tid_address sys_set_tid_address
+210 common fadvise64 sys_fadvise64_64
+211 common tgkill sys_tgkill
+212 common exit_group sys_exit_group
+213 common lookup_dcookie sys_lookup_dcookie
+214 common io_setup sys_io_setup
+215 common io_destroy sys_io_destroy
+216 common io_getevents sys_io_getevents
+217 common io_submit sys_io_submit
+218 common io_cancel sys_io_cancel
+219 common epoll_create sys_epoll_create
+220 common epoll_ctl sys_epoll_ctl
+221 common epoll_wait sys_epoll_wait
+222 common restart_syscall sys_restart_syscall
+223 common semtimedop sys_semtimedop
+224 common timer_create sys_timer_create
+225 common timer_settime sys_timer_settime
+226 common timer_gettime sys_timer_gettime
+227 common timer_getoverrun sys_timer_getoverrun
+228 common timer_delete sys_timer_delete
+229 common clock_settime sys_clock_settime
+230 common clock_gettime sys_clock_gettime
+231 common clock_getres sys_clock_getres
+232 common clock_nanosleep sys_clock_nanosleep
+233 common fstatfs64 sys_fstatfs64
+234 common statfs64 sys_statfs64
+235 common mbind sys_mbind
+236 common get_mempolicy sys_get_mempolicy
+237 common set_mempolicy sys_set_mempolicy
+238 common mq_open sys_mq_open
+239 common mq_unlink sys_mq_unlink
+240 common mq_timedsend sys_mq_timedsend
+241 common mq_timedreceive sys_mq_timedreceive
+242 common mq_notify sys_mq_notify
+243 common mq_getsetattr sys_mq_getsetattr
+244 common kexec_load sys_kexec_load
+245 common vserver sys_ni_syscall
+246 common waitid sys_waitid
+247 common add_key sys_add_key
+248 common request_key sys_request_key
+249 common keyctl sys_keyctl
+250 common ioprio_set sys_ioprio_set
+251 common ioprio_get sys_ioprio_get
+252 common move_pages sys_move_pages
+253 common inotify_init sys_inotify_init
+254 common inotify_add_watch sys_inotify_add_watch
+255 common inotify_rm_watch sys_inotify_rm_watch
+256 common migrate_pages sys_migrate_pages
+257 common openat sys_openat
+258 common mkdirat sys_mkdirat
+259 common mknodat sys_mknodat
+260 common fchownat sys_fchownat
+261 common futimesat sys_futimesat
+262 common newfstatat sys_newfstatat
+263 common unlinkat sys_unlinkat
+264 common renameat sys_renameat
+265 common linkat sys_linkat
+266 common symlinkat sys_symlinkat
+267 common readlinkat sys_readlinkat
+268 common fchmodat sys_fchmodat
+269 common faccessat sys_faccessat
+270 common pselect6 sys_pselect6
+271 common ppoll sys_ppoll
+272 common unshare sys_unshare
+273 common splice sys_splice
+274 common set_robust_list sys_set_robust_list
+275 common get_robust_list sys_get_robust_list
+276 common sync_file_range sys_sync_file_range
+277 common tee sys_tee
+278 common vmsplice sys_vmsplice
+279 common fallocate sys_fallocate
+280 common getcpu sys_getcpu
+281 common epoll_pwait sys_epoll_pwait
+282 common utimensat sys_utimensat
+283 common signalfd sys_signalfd
+284 common timerfd sys_ni_syscall
+285 common eventfd sys_eventfd
+286 common timerfd_create sys_timerfd_create
+287 common timerfd_settime sys_timerfd_settime
+288 common timerfd_gettime sys_timerfd_gettime
+289 common signalfd4 sys_signalfd4
+290 common eventfd2 sys_eventfd2
+291 common epoll_create1 sys_epoll_create1
+292 common dup3 sys_dup3
+293 common pipe2 sys_pipe2
+294 common inotify_init1 sys_inotify_init1
+295 common preadv sys_preadv
+296 common pwritev sys_pwritev
+297 common rt_tgsigqueueinfo sys_rt_tgsigqueueinfo
+298 common recvmmsg sys_recvmmsg
+299 common fanotify_init sys_fanotify_init
+300 common fanotify_mark sys_fanotify_mark
+301 common prlimit64 sys_prlimit64
+302 common name_to_handle_at sys_name_to_handle_at
+303 common open_by_handle_at sys_open_by_handle_at
+304 common clock_adjtime sys_clock_adjtime
+305 common syncfs sys_syncfs
+306 common setns sys_setns
+307 common sendmmsg sys_sendmmsg
+308 common process_vm_readv sys_process_vm_readv
+309 common process_vm_writev sys_process_vm_writev
+310 common accept4 sys_accept4
+311 common finit_module sys_finit_module
+312 common sched_setattr sys_sched_setattr
+313 common sched_getattr sys_sched_getattr
+314 common renameat2 sys_renameat2
+315 common getrandom sys_getrandom
+316 common memfd_create sys_memfd_create
+317 common bpf sys_bpf
+318 common execveat sys_execveat
+319 common userfaultfd sys_userfaultfd
+320 common membarrier sys_membarrier
+321 common kcmp sys_kcmp
+322 common mlock2 sys_mlock2
+323 common copy_file_range sys_copy_file_range
+324 common preadv2 sys_preadv2
+325 common pwritev2 sys_pwritev2
diff --git a/arch/ia64/kernel/syscalls/syscallhdr.sh b/arch/ia64/kernel/syscalls/syscallhdr.sh
new file mode 100644
index 0000000..34d8ad3
--- /dev/null
+++ b/arch/ia64/kernel/syscalls/syscallhdr.sh
@@ -0,0 +1,33 @@
+#!/bin/sh -x
+# SPDX-License-Identifier: GPL-2.0
+
+in="$1"
+out="$2"
+my_abis=`echo "($3)" | tr ',' '|'`
+prefix="$4"
+offset="$5"
+
+fileguard=_UAPI_ASM_IA64_`basename "$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/ia64/kernel/syscalls/syscalltbl.sh b/arch/ia64/kernel/syscalls/syscalltbl.sh
new file mode 100644
index 0000000..2d708db
--- /dev/null
+++ b/arch/ia64/kernel/syscalls/syscalltbl.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+in="$1"
+out="$2"
+my_abi="$3"
+offset="$4"
+
+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 | (
+ if [ -z "$offset" ]; then
+ nxt=0
+ else
+ nxt=$offset
+ fi
+
+ while read nr abi name entry ; do
+ emit $nxt $nr $entry
+ nxt=$nr+$nxt
+ let nxt=nxt+1
+ done
+) > "$out"
--
1.9.1
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