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Subject[tip: x86/entry] x86/entry/64: Add __SYSCALL_COMMON()
The following commit has been merged into the x86/entry branch of tip:

Commit-ID: 8210efcb153625d2bf4bb79875ddc78eee2aba3e
Gitweb: https://git.kernel.org/tip/8210efcb153625d2bf4bb79875ddc78eee2aba3e
Author: Brian Gerst <brgerst@gmail.com>
AuthorDate: Fri, 13 Mar 2020 15:51:37 -04:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Sat, 21 Mar 2020 16:03:22 +01:00

x86/entry/64: Add __SYSCALL_COMMON()

Add a __SYSCALL_COMMON() macro to the syscall table, which simplifies syscalltbl.sh.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200313195144.164260-12-brgerst@gmail.com

---
arch/x86/entry/syscall_64.c | 1 +
arch/x86/entry/syscall_x32.c | 3 +++
arch/x86/entry/syscalls/syscalltbl.sh | 22 ++--------------------
arch/x86/um/sys_call_table_64.c | 3 +++
4 files changed, 9 insertions(+), 20 deletions(-)

diff --git a/arch/x86/entry/syscall_64.c b/arch/x86/entry/syscall_64.c
index bce4821..03645f9 100644
--- a/arch/x86/entry/syscall_64.c
+++ b/arch/x86/entry/syscall_64.c
@@ -9,6 +9,7 @@
#include <asm/syscall.h>

#define __SYSCALL_X32(nr, sym)
+#define __SYSCALL_COMMON(nr, sym) __SYSCALL_64(nr, sym)

#define __SYSCALL_64(nr, sym) extern asmlinkage long sym(const struct pt_regs *);
#include <asm/syscalls_64.h>
diff --git a/arch/x86/entry/syscall_x32.c b/arch/x86/entry/syscall_x32.c
index 21e306c..57a151a 100644
--- a/arch/x86/entry/syscall_x32.c
+++ b/arch/x86/entry/syscall_x32.c
@@ -11,10 +11,13 @@
#define __SYSCALL_64(nr, sym)

#define __SYSCALL_X32(nr, sym) extern asmlinkage long sym(const struct pt_regs *);
+#define __SYSCALL_COMMON(nr, sym) extern asmlinkage long sym(const struct pt_regs *);
#include <asm/syscalls_64.h>
#undef __SYSCALL_X32
+#undef __SYSCALL_COMMON

#define __SYSCALL_X32(nr, sym) [nr] = sym,
+#define __SYSCALL_COMMON(nr, sym) [nr] = sym,

asmlinkage const sys_call_ptr_t x32_sys_call_table[__NR_x32_syscall_max+1] = {
/*
diff --git a/arch/x86/entry/syscalls/syscalltbl.sh b/arch/x86/entry/syscalls/syscalltbl.sh
index b0519dd..6106ed3 100644
--- a/arch/x86/entry/syscalls/syscalltbl.sh
+++ b/arch/x86/entry/syscalls/syscalltbl.sh
@@ -25,7 +25,7 @@ emit() {
fi

# For CONFIG_UML, we need to strip the __x64_sys prefix
- if [ "$abi" = "64" -a "${entry}" != "${entry#__x64_sys}" ]; then
+ if [ "${entry}" != "${entry#__x64_sys}" ]; then
umlentry="sys${entry#__x64_sys}"
fi

@@ -53,24 +53,6 @@ emit() {
grep '^[0-9]' "$in" | sort -n | (
while read nr abi name entry compat; do
abi=`echo "$abi" | tr '[a-z]' '[A-Z]'`
- if [ "$abi" = "COMMON" -o "$abi" = "64" ]; then
- emit 64 "$nr" "$entry" "$compat"
- if [ "$abi" = "COMMON" ]; then
- # COMMON means that this syscall exists in the same form for
- # 64-bit and X32.
- echo "#ifdef CONFIG_X86_X32_ABI"
- emit X32 "$nr" "$entry" "$compat"
- echo "#endif"
- fi
- elif [ "$abi" = "X32" ]; then
- echo "#ifdef CONFIG_X86_X32_ABI"
- emit X32 "$nr" "$entry" "$compat"
- echo "#endif"
- elif [ "$abi" = "I386" ]; then
- emit "$abi" "$nr" "$entry" "$compat"
- else
- echo "Unknown abi $abi" >&2
- exit 1
- fi
+ emit "$abi" "$nr" "$entry" "$compat"
done
) > "$out"
diff --git a/arch/x86/um/sys_call_table_64.c b/arch/x86/um/sys_call_table_64.c
index 7d057ea..2e8544d 100644
--- a/arch/x86/um/sys_call_table_64.c
+++ b/arch/x86/um/sys_call_table_64.c
@@ -36,6 +36,9 @@
#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) ;
#include <asm/syscalls_64.h>

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