Merge branch 'sparc-syscall-gen'

Firoz Khan says:

====================
sparc: system call table generation support

The purpose of this patch series is, we can easily
add/modify/delete system call table support by cha-
nging entry in syscall.tbl file instead of manually
changing many files. The other goal is to unify the
system call table generation support implementation
across all the architectures.

The system call tables are in different format in
all architecture. It will be difficult to manually
add, modify or delete the system calls in the resp-
ective files manually. To make it easy by keeping a
script and which'll generate uapi header file and
syscall table file.

syscall.tbl contains the list of available system
calls along with system call number and correspond-
ing entry point. Add a new system call in this arch-
itecture 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.
	- Compat entry name, if required.

ARM, s390 and x86 architecuture does exist the sim-
ilar support. I leverage their implementation to
come up with a generic solution.

I have done the same support for work for alpha,
ia64, m68k, microblaze, mips, parisc, powerpc, sh
and xtensa. Below mentioned git repository contains
more details about the workflow.

https://github.com/frzkhn/system_call_table_generator/

Finally, this is the ground work to solve the Y2038
issue. We need to add two dozen of system calls to
solve Y2038 issue. So this patch series will help to
add new system calls easily by adding new entry in the
syscall.tbl.

Changes since v2:
 - changed from generic-y to generated-y in Kbuild.
 - added io_pgetevents entry in the syscall.tbl.
 - updated the compat system call table.

Changes since v1:
 - optimized/updated the syscall table generation
   scripts.
 - fixed all mixed indentation issues in syscall.tbl.
 - added "comments" in syscall.tbl.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/Makefile

@@ -81,6 +81,9 @@ install:
 archclean:
 	$(Q)$(MAKE) $(clean)=$(boot)
 
+archheaders:
+	$(Q)$(MAKE) $(build)=arch/sparc/kernel/syscalls all
+
 PHONY += vdso_install
 vdso_install:
 	$(Q)$(MAKE) $(build)=arch/sparc/vdso $@

arch/sparc/include/asm/Kbuild

 # User exported sparc header files
 
-
+generated-y += syscall_table_32.h
+generated-y += syscall_table_64.h
+generated-y += syscall_table_c32.h
 generic-y += div64.h
 generic-y += emergency-restart.h
 generic-y += exec.h

arch/sparc/include/asm/unistd.h

@@ -17,6 +17,8 @@
 
 #include <uapi/asm/unistd.h>
 
+#define NR_syscalls	__NR_syscalls
+
 #ifdef __32bit_syscall_numbers__
 #else
 #define __NR_time		231 /* Linux sparc32                               */
@@ -46,4 +48,20 @@
 #define __ARCH_WANT_COMPAT_SYS_SENDFILE
 #endif
 
+#ifdef __32bit_syscall_numbers__
+/* Sparc 32-bit only has the "setresuid32", "getresuid32" variants,
+ * it never had the plain ones and there is no value to adding those
+ * old versions into the syscall table.
+ */
+#define __IGNORE_setresuid
+#define __IGNORE_getresuid
+#define __IGNORE_setresgid
+#define __IGNORE_getresgid
+#endif
+
+/* Sparc doesn't have protection keys. */
+#define __IGNORE_pkey_mprotect
+#define __IGNORE_pkey_alloc
+#define __IGNORE_pkey_free
+
 #endif /* _SPARC_UNISTD_H */

arch/sparc/include/uapi/asm/Kbuild

 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 
+generated-y += unistd_32.h
+generated-y += unistd_64.h
 generic-y += bpf_perf_event.h
 generic-y += types.h

arch/sparc/kernel/syscalls/Makefile

+# SPDX-License-Identifier: GPL-2.0
+kapi := arch/$(SRCARCH)/include/generated/asm
+uapi := arch/$(SRCARCH)/include/generated/uapi/asm
+
+_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)')	\
+	  $(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
+
+syscall := $(srctree)/$(src)/syscall.tbl
+syshdr := $(srctree)/$(src)/syscallhdr.sh
+systbl := $(srctree)/$(src)/syscalltbl.sh
+
+quiet_cmd_syshdr = SYSHDR  $@
+      cmd_syshdr = $(CONFIG_SHELL) '$(syshdr)' '$<' '$@'	\
+		   '$(syshdr_abis_$(basetarget))'		\
+		   '$(syshdr_pfx_$(basetarget))'		\
+		   '$(syshdr_offset_$(basetarget))'
+
+quiet_cmd_systbl = SYSTBL  $@
+      cmd_systbl = $(CONFIG_SHELL) '$(systbl)' '$<' '$@'	\
+		   '$(systbl_abis_$(basetarget))'		\
+		   '$(systbl_abi_$(basetarget))'		\
+		   '$(systbl_offset_$(basetarget))'
+
+syshdr_abis_unistd_32 := common,32
+$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+	$(call if_changed,syshdr)
+
+syshdr_abis_unistd_64 := common,64
+$(uapi)/unistd_64.h: $(syscall) $(syshdr)
+	$(call if_changed,syshdr)
+
+systbl_abis_syscall_table_32 := common,32
+$(kapi)/syscall_table_32.h: $(syscall) $(systbl)
+	$(call if_changed,systbl)
+
+systbl_abis_syscall_table_64 := common,64
+$(kapi)/syscall_table_64.h: $(syscall) $(systbl)
+	$(call if_changed,systbl)
+
+systbl_abis_syscall_table_c32 := common,32
+systbl_abi_syscall_table_c32 := c32
+$(kapi)/syscall_table_c32.h: $(syscall) $(systbl)
+	$(call if_changed,systbl)
+
+uapisyshdr-y		+= unistd_32.h unistd_64.h
+kapisyshdr-y		+= syscall_table_32.h		\
+			   syscall_table_64.h		\
+			   syscall_table_c32.h
+
+targets	+= $(uapisyshdr-y) $(kapisyshdr-y)
+
+PHONY += all
+all: $(addprefix $(uapi)/,$(uapisyshdr-y))
+all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+	@:

arch/sparc/kernel/syscalls/syscallhdr.sh

+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+in="$1"
+out="$2"
+my_abis=`echo "($3)" | tr ',' '|'`
+prefix="$4"
+offset="$5"
+
+fileguard=_UAPI_ASM_SPARC_`basename "$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 | (
+	printf "#ifndef %s\n" "${fileguard}"
+	printf "#define %s\n" "${fileguard}"
+	printf "\n"
+
+	nxt=0
+	while read nr abi name entry compat ; do
+		if [ -z "$offset" ]; then
+			printf "#define __NR_%s%s\t%s\n" \
+				"${prefix}" "${name}" "${nr}"
+		else
+			printf "#define __NR_%s%s\t(%s + %s)\n" \
+				"${prefix}" "${name}" "${offset}" "${nr}"
+		fi
+		nxt=$((nr+1))
+	done
+
+	printf "\n"
+	printf "#ifdef __KERNEL__\n"
+	printf "#define __NR_syscalls\t%s\n" "${nxt}"
+	printf "#endif\n"
+	printf "\n"
+	printf "#endif /* %s */" "${fileguard}"
+) > "$out"

arch/sparc/kernel/syscalls/syscalltbl.sh

+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+in="$1"
+out="$2"
+my_abis=`echo "($3)" | tr ',' '|'`
+my_abi="$4"
+offset="$5"
+
+emit() {
+	t_nxt="$1"
+	t_nr="$2"
+	t_entry="$3"
+
+	while [ $t_nxt -lt $t_nr ]; do
+		printf "__SYSCALL(%s, sys_nis_syscall, )\n" "${t_nxt}"
+		t_nxt=$((t_nxt+1))
+	done
+	printf "__SYSCALL(%s, %s, )\n" "${t_nxt}" "${t_entry}"
+}
+
+grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | (
+	nxt=0
+	if [ -z "$offset" ]; then
+		offset=0
+	fi
+
+	while read nr abi name entry compat ; do
+		if [ "$my_abi" = "c32" ] && [ ! -z "$compat" ]; then
+			emit $((nxt+offset)) $((nr+offset)) $compat
+		else
+			emit $((nxt+offset)) $((nr+offset)) $entry
+		fi
+		nxt=$((nr+1))
+	done
+) > "$out"

arch/sparc/kernel/systbls_32.S

@@ -9,85 +9,10 @@
  * Copyright (C) 1995 Adrian M. Rodriguez (adrian@remus.rutgers.edu)
  */
 
-
+#define __SYSCALL(nr, entry, nargs) .long entry
 	.data
 	.align 4
-
-	/* First, the Linux native syscall table. */
-
 	.globl sys_call_table
 sys_call_table:
-/*0*/	.long sys_restart_syscall, sys_exit, sys_fork, sys_read, sys_write
-/*5*/	.long sys_open, sys_close, sys_wait4, sys_creat, sys_link
-/*10*/  .long sys_unlink, sunos_execv, sys_chdir, sys_chown16, sys_mknod
-/*15*/	.long sys_chmod, sys_lchown16, sys_brk, sys_nis_syscall, sys_lseek
-/*20*/	.long sys_getpid, sys_capget, sys_capset, sys_setuid16, sys_getuid16
-/*25*/	.long sys_vmsplice, sys_ptrace, sys_alarm, sys_sigaltstack, sys_pause
-/*30*/	.long sys_utime, sys_lchown, sys_fchown, sys_access, sys_nice
-/*35*/	.long sys_chown, sys_sync, sys_kill, sys_newstat, sys_sendfile
-/*40*/	.long sys_newlstat, sys_dup, sys_sparc_pipe, sys_times, sys_getuid
-/*45*/	.long sys_umount, sys_setgid16, sys_getgid16, sys_signal, sys_geteuid16
-/*50*/	.long sys_getegid16, sys_acct, sys_nis_syscall, sys_getgid, sys_ioctl
-/*55*/	.long sys_reboot, sys_mmap2, sys_symlink, sys_readlink, sys_execve
-/*60*/	.long sys_umask, sys_chroot, sys_newfstat, sys_fstat64, sys_getpagesize
-/*65*/	.long sys_msync, sys_vfork, sys_pread64, sys_pwrite64, sys_geteuid
-/*70*/	.long sys_getegid, sys_mmap, sys_setreuid, sys_munmap, sys_mprotect
-/*75*/	.long sys_madvise, sys_vhangup, sys_truncate64, sys_mincore, sys_getgroups16
-/*80*/	.long sys_setgroups16, sys_getpgrp, sys_setgroups, sys_setitimer, sys_ftruncate64
-/*85*/	.long sys_swapon, sys_getitimer, sys_setuid, sys_sethostname, sys_setgid
-/*90*/	.long sys_dup2, sys_setfsuid, sys_fcntl, sys_select, sys_setfsgid
-/*95*/	.long sys_fsync, sys_setpriority, sys_socket, sys_connect, sys_accept
-/*100*/	.long sys_getpriority, sys_rt_sigreturn, sys_rt_sigaction, sys_rt_sigprocmask, sys_rt_sigpending
-/*105*/	.long sys_rt_sigtimedwait, sys_rt_sigqueueinfo, sys_rt_sigsuspend, sys_setresuid, sys_getresuid
-/*110*/	.long sys_setresgid, sys_getresgid, sys_setregid, sys_recvmsg, sys_sendmsg
-/*115*/	.long sys_getgroups, sys_gettimeofday, sys_getrusage, sys_getsockopt, sys_getcwd
-/*120*/	.long sys_readv, sys_writev, sys_settimeofday, sys_fchown16, sys_fchmod
-/*125*/	.long sys_recvfrom, sys_setreuid16, sys_setregid16, sys_rename, sys_truncate
-/*130*/	.long sys_ftruncate, sys_flock, sys_lstat64, sys_sendto, sys_shutdown
-/*135*/	.long sys_socketpair, sys_mkdir, sys_rmdir, sys_utimes, sys_stat64
-/*140*/	.long sys_sendfile64, sys_getpeername, sys_futex, sys_gettid, sys_getrlimit
-/*145*/	.long sys_setrlimit, sys_pivot_root, sys_prctl, sys_pciconfig_read, sys_pciconfig_write
-/*150*/	.long sys_getsockname, sys_inotify_init, sys_inotify_add_watch, sys_poll, sys_getdents64
-/*155*/	.long sys_fcntl64, sys_inotify_rm_watch, sys_statfs, sys_fstatfs, sys_oldumount
-/*160*/	.long sys_sched_setaffinity, sys_sched_getaffinity, sys_getdomainname, sys_setdomainname, sys_nis_syscall
-/*165*/	.long sys_quotactl, sys_set_tid_address, sys_mount, sys_ustat, sys_setxattr
-/*170*/	.long sys_lsetxattr, sys_fsetxattr, sys_getxattr, sys_lgetxattr, sys_getdents
-/*175*/	.long sys_setsid, sys_fchdir, sys_fgetxattr, sys_listxattr, sys_llistxattr
-/*180*/	.long sys_flistxattr, sys_removexattr, sys_lremovexattr, sys_sigpending, sys_ni_syscall
-/*185*/	.long sys_setpgid, sys_fremovexattr, sys_tkill, sys_exit_group, sys_newuname
-/*190*/	.long sys_init_module, sys_personality, sys_sparc_remap_file_pages, sys_epoll_create, sys_epoll_ctl
-/*195*/	.long sys_epoll_wait, sys_ioprio_set, sys_getppid, sys_sparc_sigaction, sys_sgetmask
-/*200*/	.long sys_ssetmask, sys_sigsuspend, sys_newlstat, sys_uselib, sys_old_readdir
-/*205*/	.long sys_readahead, sys_socketcall, sys_syslog, sys_lookup_dcookie, sys_fadvise64
-/*210*/	.long sys_fadvise64_64, sys_tgkill, sys_waitpid, sys_swapoff, sys_sysinfo
-/*215*/	.long sys_ipc, sys_sigreturn, sys_clone, sys_ioprio_get, sys_adjtimex
-/*220*/	.long sys_sigprocmask, sys_ni_syscall, sys_delete_module, sys_ni_syscall, sys_getpgid
-/*225*/	.long sys_bdflush, sys_sysfs, sys_nis_syscall, sys_setfsuid16, sys_setfsgid16
-/*230*/	.long sys_select, sys_time, sys_splice, sys_stime, sys_statfs64
-					  /* "We are the Knights of the Forest of Ni!!" */
-/*235*/	.long sys_fstatfs64, sys_llseek, sys_mlock, sys_munlock, sys_mlockall
-/*240*/	.long sys_munlockall, sys_sched_setparam, sys_sched_getparam, sys_sched_setscheduler, sys_sched_getscheduler
-/*245*/	.long sys_sched_yield, sys_sched_get_priority_max, sys_sched_get_priority_min, sys_sched_rr_get_interval, sys_nanosleep
-/*250*/	.long sys_mremap, sys_sysctl, sys_getsid, sys_fdatasync, sys_ni_syscall
-/*255*/	.long sys_sync_file_range, sys_clock_settime, sys_clock_gettime, sys_clock_getres, sys_clock_nanosleep
-/*260*/	.long sys_sched_getaffinity, sys_sched_setaffinity, sys_timer_settime, sys_timer_gettime, sys_timer_getoverrun
-/*265*/	.long sys_timer_delete, sys_timer_create, sys_nis_syscall, sys_io_setup, sys_io_destroy
-/*270*/	.long sys_io_submit, sys_io_cancel, sys_io_getevents, sys_mq_open, sys_mq_unlink
-/*275*/	.long sys_mq_timedsend, sys_mq_timedreceive, sys_mq_notify, sys_mq_getsetattr, sys_waitid
-/*280*/	.long sys_tee, sys_add_key, sys_request_key, sys_keyctl, sys_openat
-/*285*/	.long sys_mkdirat, sys_mknodat, sys_fchownat, sys_futimesat, sys_fstatat64
-/*290*/	.long sys_unlinkat, sys_renameat, sys_linkat, sys_symlinkat, sys_readlinkat
-/*295*/	.long sys_fchmodat, sys_faccessat, sys_pselect6, sys_ppoll, sys_unshare
-/*300*/	.long sys_set_robust_list, sys_get_robust_list, sys_migrate_pages, sys_mbind, sys_get_mempolicy
-/*305*/	.long sys_set_mempolicy, sys_kexec_load, sys_move_pages, sys_getcpu, sys_epoll_pwait
-/*310*/	.long sys_utimensat, sys_signalfd, sys_timerfd_create, sys_eventfd, sys_fallocate
-/*315*/	.long sys_timerfd_settime, sys_timerfd_gettime, sys_signalfd4, sys_eventfd2, sys_epoll_create1
-/*320*/	.long sys_dup3, sys_pipe2, sys_inotify_init1, sys_accept4, sys_preadv
-/*325*/	.long sys_pwritev, sys_rt_tgsigqueueinfo, sys_perf_event_open, sys_recvmmsg, sys_fanotify_init
-/*330*/	.long sys_fanotify_mark, sys_prlimit64, sys_name_to_handle_at, sys_open_by_handle_at, sys_clock_adjtime
-/*335*/	.long sys_syncfs, sys_sendmmsg, sys_setns, sys_process_vm_readv, sys_process_vm_writev
-/*340*/	.long sys_ni_syscall, sys_kcmp, sys_finit_module, sys_sched_setattr, sys_sched_getattr
-/*345*/	.long sys_renameat2, sys_seccomp, sys_getrandom, sys_memfd_create, sys_bpf
-/*350*/	.long sys_execveat, sys_membarrier, sys_userfaultfd, sys_bind, sys_listen
-/*355*/	.long sys_setsockopt, sys_mlock2, sys_copy_file_range, sys_preadv2, sys_pwritev2
-/*360*/	.long sys_statx, sys_io_pgetevents
+#include <asm/syscall_table_32.h>	/* 32-bit native syscalls */
+#undef __SYSCALL