[tip: x86/entry] x86/syscalls: Switch to generic syscalltbl.sh
From: tip-bot2 for Masahiro Yamada
Date: Thu May 20 2021 - 09:24:21 EST
The following commit has been merged into the x86/entry branch of tip:
Commit-ID: 6218d0f6b8dece1f2e82f0a47a0e6b8ecb631ef6
Gitweb: https://git.kernel.org/tip/6218d0f6b8dece1f2e82f0a47a0e6b8ecb631ef6
Author: Masahiro Yamada <masahiroy@xxxxxxxxxx>
AuthorDate: Mon, 17 May 2021 16:38:10 +09:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Thu, 20 May 2021 15:03:58 +02:00
x86/syscalls: Switch to generic syscalltbl.sh
Many architectures duplicate similar shell scripts.
Convert x86 and UML to use scripts/syscalltbl.sh. The generic script
generates seperate headers for x86/64 and x86/x32 syscalls, while the x86
specific script coalesced them into one. Adjust the code accordingly.
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210517073815.97426-3-masahiroy@xxxxxxxxxx
---
arch/x86/entry/syscall_32.c | 12 +++++--
arch/x86/entry/syscall_64.c | 9 +----
arch/x86/entry/syscall_x32.c | 15 ++------
arch/x86/entry/syscalls/Makefile | 10 ++++--
arch/x86/entry/syscalls/syscalltbl.sh | 46 +--------------------------
arch/x86/include/asm/Kbuild | 1 +-
arch/x86/um/sys_call_table_32.c | 8 +++--
arch/x86/um/sys_call_table_64.c | 9 +----
8 files changed, 34 insertions(+), 76 deletions(-)
delete mode 100644 arch/x86/entry/syscalls/syscalltbl.sh
diff --git a/arch/x86/entry/syscall_32.c b/arch/x86/entry/syscall_32.c
index 86eb0d8..70bf46e 100644
--- a/arch/x86/entry/syscall_32.c
+++ b/arch/x86/entry/syscall_32.c
@@ -8,12 +8,18 @@
#include <asm/unistd.h>
#include <asm/syscall.h>
-#define __SYSCALL_I386(nr, sym) extern long __ia32_##sym(const struct pt_regs *);
+#ifdef CONFIG_IA32_EMULATION
+#define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, compat)
+#else
+#define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
+#endif
+
+#define __SYSCALL(nr, sym) extern long __ia32_##sym(const struct pt_regs *);
#include <asm/syscalls_32.h>
-#undef __SYSCALL_I386
+#undef __SYSCALL
-#define __SYSCALL_I386(nr, sym) [nr] = __ia32_##sym,
+#define __SYSCALL(nr, sym) [nr] = __ia32_##sym,
__visible const sys_call_ptr_t ia32_sys_call_table[__NR_ia32_syscall_max+1] = {
/*
diff --git a/arch/x86/entry/syscall_64.c b/arch/x86/entry/syscall_64.c
index 1594ec7..82670bb 100644
--- a/arch/x86/entry/syscall_64.c
+++ b/arch/x86/entry/syscall_64.c
@@ -8,14 +8,11 @@
#include <asm/unistd.h>
#include <asm/syscall.h>
-#define __SYSCALL_X32(nr, sym)
-#define __SYSCALL_COMMON(nr, sym) __SYSCALL_64(nr, sym)
-
-#define __SYSCALL_64(nr, sym) extern long __x64_##sym(const struct pt_regs *);
+#define __SYSCALL(nr, sym) extern long __x64_##sym(const struct pt_regs *);
#include <asm/syscalls_64.h>
-#undef __SYSCALL_64
+#undef __SYSCALL
-#define __SYSCALL_64(nr, sym) [nr] = __x64_##sym,
+#define __SYSCALL(nr, sym) [nr] = __x64_##sym,
asmlinkage const sys_call_ptr_t sys_call_table[__NR_syscall_max+1] = {
/*
diff --git a/arch/x86/entry/syscall_x32.c b/arch/x86/entry/syscall_x32.c
index 3fea8fb..6d2ef88 100644
--- a/arch/x86/entry/syscall_x32.c
+++ b/arch/x86/entry/syscall_x32.c
@@ -8,16 +8,11 @@
#include <asm/unistd.h>
#include <asm/syscall.h>
-#define __SYSCALL_64(nr, sym)
+#define __SYSCALL(nr, sym) extern long __x64_##sym(const struct pt_regs *);
+#include <asm/syscalls_x32.h>
+#undef __SYSCALL
-#define __SYSCALL_X32(nr, sym) extern long __x64_##sym(const struct pt_regs *);
-#define __SYSCALL_COMMON(nr, sym) extern long __x64_##sym(const struct pt_regs *);
-#include <asm/syscalls_64.h>
-#undef __SYSCALL_X32
-#undef __SYSCALL_COMMON
-
-#define __SYSCALL_X32(nr, sym) [nr] = __x64_##sym,
-#define __SYSCALL_COMMON(nr, sym) [nr] = __x64_##sym,
+#define __SYSCALL(nr, sym) [nr] = __x64_##sym,
asmlinkage const sys_call_ptr_t x32_sys_call_table[__NR_x32_syscall_max+1] = {
/*
@@ -25,5 +20,5 @@ asmlinkage const sys_call_ptr_t x32_sys_call_table[__NR_x32_syscall_max+1] = {
* when the & below is removed.
*/
[0 ... __NR_x32_syscall_max] = &__x64_sys_ni_syscall,
-#include <asm/syscalls_64.h>
+#include <asm/syscalls_x32.h>
};
diff --git a/arch/x86/entry/syscalls/Makefile b/arch/x86/entry/syscalls/Makefile
index d8c4f6c..c4bd8dd 100644
--- a/arch/x86/entry/syscalls/Makefile
+++ b/arch/x86/entry/syscalls/Makefile
@@ -10,7 +10,7 @@ syscall32 := $(src)/syscall_32.tbl
syscall64 := $(src)/syscall_64.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
-systbl := $(srctree)/$(src)/syscalltbl.sh
+systbl := $(srctree)/scripts/syscalltbl.sh
quiet_cmd_syshdr = SYSHDR $@
cmd_syshdr = $(CONFIG_SHELL) '$(syshdr)' '$<' '$@' \
@@ -18,7 +18,7 @@ quiet_cmd_syshdr = SYSHDR $@
'$(syshdr_pfx_$(basetarget))' \
'$(syshdr_offset_$(basetarget))'
quiet_cmd_systbl = SYSTBL $@
- cmd_systbl = $(CONFIG_SHELL) '$(systbl)' $< $@
+ cmd_systbl = $(CONFIG_SHELL) $(systbl) --abis $(abis) $< $@
quiet_cmd_hypercalls = HYPERCALLS $@
cmd_hypercalls = $(CONFIG_SHELL) '$<' $@ $(filter-out $<, $(real-prereqs))
@@ -46,10 +46,15 @@ syshdr_pfx_unistd_64_x32 := x32_
$(out)/unistd_64_x32.h: $(syscall64) $(syshdr) FORCE
$(call if_changed,syshdr)
+$(out)/syscalls_32.h: abis := i386
$(out)/syscalls_32.h: $(syscall32) $(systbl) FORCE
$(call if_changed,systbl)
+$(out)/syscalls_64.h: abis := common,64
$(out)/syscalls_64.h: $(syscall64) $(systbl) FORCE
$(call if_changed,systbl)
+$(out)/syscalls_x32.h: abis := common,x32
+$(out)/syscalls_x32.h: $(syscall64) $(systbl) FORCE
+ $(call if_changed,systbl)
$(out)/xen-hypercalls.h: $(srctree)/scripts/xen-hypercalls.sh FORCE
$(call if_changed,hypercalls)
@@ -60,6 +65,7 @@ uapisyshdr-y += unistd_32.h unistd_64.h unistd_x32.h
syshdr-y += syscalls_32.h
syshdr-$(CONFIG_X86_64) += unistd_32_ia32.h unistd_64_x32.h
syshdr-$(CONFIG_X86_64) += syscalls_64.h
+syshdr-$(CONFIG_X86_X32) += syscalls_x32.h
syshdr-$(CONFIG_XEN) += xen-hypercalls.h
uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
diff --git a/arch/x86/entry/syscalls/syscalltbl.sh b/arch/x86/entry/syscalls/syscalltbl.sh
deleted file mode 100644
index 929bde1..0000000
--- a/arch/x86/entry/syscalls/syscalltbl.sh
+++ /dev/null
@@ -1,46 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0
-
-in="$1"
-out="$2"
-
-syscall_macro() {
- local abi="$1"
- local nr="$2"
- local entry="$3"
-
- echo "__SYSCALL_${abi}($nr, $entry)"
-}
-
-emit() {
- local abi="$1"
- local nr="$2"
- local entry="$3"
- local compat="$4"
-
- if [ "$abi" != "I386" -a -n "$compat" ]; then
- echo "a compat entry ($abi: $compat) for a 64-bit syscall makes no sense" >&2
- exit 1
- fi
-
- if [ -z "$compat" ]; then
- if [ -n "$entry" ]; then
- syscall_macro "$abi" "$nr" "$entry"
- fi
- else
- echo "#ifdef CONFIG_X86_32"
- if [ -n "$entry" ]; then
- syscall_macro "$abi" "$nr" "$entry"
- fi
- echo "#else"
- syscall_macro "$abi" "$nr" "$compat"
- echo "#endif"
- fi
-}
-
-grep '^[0-9]' "$in" | sort -n | (
- while read nr abi name entry compat; do
- abi=`echo "$abi" | tr '[a-z]' '[A-Z]'`
- emit "$abi" "$nr" "$entry" "$compat"
- done
-) > "$out"
diff --git a/arch/x86/include/asm/Kbuild b/arch/x86/include/asm/Kbuild
index b19ec82..1e51650 100644
--- a/arch/x86/include/asm/Kbuild
+++ b/arch/x86/include/asm/Kbuild
@@ -3,6 +3,7 @@
generated-y += syscalls_32.h
generated-y += syscalls_64.h
+generated-y += syscalls_x32.h
generated-y += unistd_32_ia32.h
generated-y += unistd_64_x32.h
generated-y += xen-hypercalls.h
diff --git a/arch/x86/um/sys_call_table_32.c b/arch/x86/um/sys_call_table_32.c
index 2ed81e5..e83619c 100644
--- a/arch/x86/um/sys_call_table_32.c
+++ b/arch/x86/um/sys_call_table_32.c
@@ -26,11 +26,13 @@
#define old_mmap sys_old_mmap
-#define __SYSCALL_I386(nr, sym) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
+#define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
+
+#define __SYSCALL(nr, sym) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
#include <asm/syscalls_32.h>
-#undef __SYSCALL_I386
-#define __SYSCALL_I386(nr, sym) [ nr ] = sym,
+#undef __SYSCALL
+#define __SYSCALL(nr, sym) [ nr ] = sym,
extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
diff --git a/arch/x86/um/sys_call_table_64.c b/arch/x86/um/sys_call_table_64.c
index 2e8544d..6fb75af 100644
--- a/arch/x86/um/sys_call_table_64.c
+++ b/arch/x86/um/sys_call_table_64.c
@@ -36,14 +36,11 @@
#define stub_execveat sys_execveat
#define stub_rt_sigreturn sys_rt_sigreturn
-#define __SYSCALL_X32(nr, sym)
-#define __SYSCALL_COMMON(nr, sym) __SYSCALL_64(nr, sym)
-
-#define __SYSCALL_64(nr, sym) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
+#define __SYSCALL(nr, sym) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
#include <asm/syscalls_64.h>
-#undef __SYSCALL_64
-#define __SYSCALL_64(nr, sym) [ nr ] = sym,
+#undef __SYSCALL
+#define __SYSCALL(nr, sym) [ nr ] = sym,
extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);