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

diff --git a/arch/x86/entry/syscall_64.c b/arch/x86/entry/syscall_64.c
index bce4821..03645f9 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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>