mips: syscalls: switch to generic syscalltbl.sh

Many architectures duplicate similar shell scripts.

This commit converts mips to use scripts/syscalltbl.sh. This also
unifies syscall_table_32_o32.h and syscall_table_64_o32.h into
syscall_table_o32.h.

The offset parameters are unneeded here; __SYSCALL(nr, entry) is defined
as 'PTR entry', so the parameter 'nr' is not used in the first place.

With this commit, syscall tables and generated files are straight
mapped,  which makes things easier to understand.

  syscall_n32.tbl  -->  syscall_table_n32.h
  syscall_n64.tbl  -->  syscall_table_n64.h
  syscall_o32.tbl  -->  syscall_table_o32.h

Then, the abi parameters are also unneeded.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/include/asm/Kbuild

 # SPDX-License-Identifier: GPL-2.0
 # MIPS headers
-generated-y += syscall_table_32_o32.h
-generated-y += syscall_table_64_n32.h
-generated-y += syscall_table_64_n64.h
-generated-y += syscall_table_64_o32.h
+generated-y += syscall_table_n32.h
+generated-y += syscall_table_n64.h
+generated-y += syscall_table_o32.h
 generated-y += unistd_nr_n32.h
 generated-y += unistd_nr_n64.h
 generated-y += unistd_nr_o32.h

arch/mips/kernel/scall32-o32.S

@@ -217,9 +217,9 @@ einval: li	v0, -ENOSYS
 #define sys_sched_getaffinity	mipsmt_sys_sched_getaffinity
 #endif /* CONFIG_MIPS_MT_FPAFF */
 
+#define __SYSCALL_WITH_COMPAT(nr, native, compat)	__SYSCALL(nr, native)
 #define __SYSCALL(nr, entry) 	PTR entry
 	.align	2
 	.type	sys_call_table, @object
 EXPORT(sys_call_table)
-#include <asm/syscall_table_32_o32.h>
-#undef __SYSCALL
+#include <asm/syscall_table_o32.h>

arch/mips/kernel/scall64-n32.S

@@ -104,5 +104,4 @@ not_n32_scall:
 #define __SYSCALL(nr, entry)	PTR entry
 	.type	sysn32_call_table, @object
 EXPORT(sysn32_call_table)
-#include <asm/syscall_table_64_n32.h>
-#undef __SYSCALL
+#include <asm/syscall_table_n32.h>

arch/mips/kernel/scall64-n64.S

@@ -113,5 +113,4 @@ illegal_syscall:
 	.align	3
 	.type	sys_call_table, @object
 EXPORT(sys_call_table)
-#include <asm/syscall_table_64_n64.h>
-#undef __SYSCALL
+#include <asm/syscall_table_n64.h>

arch/mips/kernel/scall64-o32.S

@@ -213,9 +213,9 @@ einval: li	v0, -ENOSYS
 	jr	ra
 	END(sys32_syscall)
 
+#define __SYSCALL_WITH_COMPAT(nr, native, compat)	__SYSCALL(nr, compat)
 #define __SYSCALL(nr, entry)	PTR entry
 	.align	3
 	.type	sys32_call_table,@object
 EXPORT(sys32_call_table)
-#include <asm/syscall_table_64_o32.h>
-#undef __SYSCALL
+#include <asm/syscall_table_o32.h>

arch/mips/kernel/syscalls/Makefile

@@ -10,7 +10,7 @@ syscalln64 := $(src)/syscall_n64.tbl
 syscallo32 := $(src)/syscall_o32.tbl
 syshdr := $(srctree)/$(src)/syscallhdr.sh
 sysnr := $(srctree)/$(src)/syscallnr.sh
-systbl := $(srctree)/$(src)/syscalltbl.sh
+systbl := $(srctree)/scripts/syscalltbl.sh
 
 quiet_cmd_syshdr = SYSHDR  $@
       cmd_syshdr = $(CONFIG_SHELL) '$(syshdr)' '$<' '$@'	\
@@ -25,10 +25,7 @@ quiet_cmd_sysnr = SYSNR   $@
 		  '$(sysnr_offset_$(basetarget))'
 
 quiet_cmd_systbl = SYSTBL  $@
-      cmd_systbl = $(CONFIG_SHELL) '$(systbl)' '$<' '$@'	\
-		   '$(systbl_abis_$(basetarget))'		\
-		   '$(systbl_abi_$(basetarget))'		\
-		   '$(systbl_offset_$(basetarget))'
+      cmd_systbl = $(CONFIG_SHELL) $(systbl) $< $@
 
 syshdr_offset_unistd_n32 := __NR_Linux
 $(uapi)/unistd_n32.h: $(syscalln32) $(syshdr) FORCE
@@ -57,33 +54,21 @@ sysnr_offset_unistd_nr_o32 := 4000
 $(kapi)/unistd_nr_o32.h: $(syscallo32) $(sysnr) FORCE
 	$(call if_changed,sysnr)
 
-systbl_abi_syscall_table_32_o32 := 32_o32
-systbl_offset_syscall_table_32_o32 := 4000
-$(kapi)/syscall_table_32_o32.h: $(syscallo32) $(systbl) FORCE
+$(kapi)/syscall_table_n32.h: $(syscalln32) $(systbl) FORCE
 	$(call if_changed,systbl)
 
-systbl_abi_syscall_table_64_n32 := 64_n32
-systbl_offset_syscall_table_64_n32 := 6000
-$(kapi)/syscall_table_64_n32.h: $(syscalln32) $(systbl) FORCE
+$(kapi)/syscall_table_n64.h: $(syscalln64) $(systbl) FORCE
 	$(call if_changed,systbl)
 
-systbl_abi_syscall_table_64_n64 := 64_n64
-systbl_offset_syscall_table_64_n64 := 5000
-$(kapi)/syscall_table_64_n64.h: $(syscalln64) $(systbl) FORCE
-	$(call if_changed,systbl)
-
-systbl_abi_syscall_table_64_o32 := 64_o32
-systbl_offset_syscall_table_64_o32 := 4000
-$(kapi)/syscall_table_64_o32.h: $(syscallo32) $(systbl) FORCE
+$(kapi)/syscall_table_o32.h: $(syscallo32) $(systbl) FORCE
 	$(call if_changed,systbl)
 
 uapisyshdr-y		+= unistd_n32.h			\
 			   unistd_n64.h			\
 			   unistd_o32.h
-kapisyshdr-y		+= syscall_table_32_o32.h	\
-			   syscall_table_64_n32.h	\
-			   syscall_table_64_n64.h	\
-			   syscall_table_64_o32.h	\
+kapisyshdr-y		+= syscall_table_n32.h		\
+			   syscall_table_n64.h		\
+			   syscall_table_o32.h		\
 			   unistd_nr_n32.h		\
 			   unistd_nr_n64.h		\
 			   unistd_nr_o32.h

arch/mips/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 $t_nr ]; do
-		printf "__SYSCALL(%s,sys_ni_syscall)\n" "${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 [ "$my_abi" = "64_o32" ] && [ ! -z "$compat" ]; then
-			emit $((nxt+offset)) $((nr+offset)) $compat
-		else
-			emit $((nxt+offset)) $((nr+offset)) $entry
-		fi
-		nxt=$((nr+1))
-	done
-) > "$out"