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Subject[tip: x86/entry] x86/entry/64: Split X32 syscall table into its own file
The following commit has been merged into the x86/entry branch of tip:

Commit-ID: 2e487c357917b98adc6a6dafa612c435cad1af41
Gitweb: https://git.kernel.org/tip/2e487c357917b98adc6a6dafa612c435cad1af41
Author: Brian Gerst <brgerst@gmail.com>
AuthorDate: Fri, 13 Mar 2020 15:51:33 -04:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Sat, 21 Mar 2020 16:03:21 +01:00

x86/entry/64: Split X32 syscall table into its own file

Since X32 has its own syscall table now, move it to a separate file.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Link: https://lkml.kernel.org/r/20200313195144.164260-8-brgerst@gmail.com

---
arch/x86/entry/Makefile | 1 +
arch/x86/entry/syscall_64.c | 27 ++-------------------------
arch/x86/entry/syscall_x32.c | 26 ++++++++++++++++++++++++++
3 files changed, 29 insertions(+), 25 deletions(-)
create mode 100644 arch/x86/entry/syscall_x32.c

diff --git a/arch/x86/entry/Makefile b/arch/x86/entry/Makefile
index 06fc70c..85eb381 100644
--- a/arch/x86/entry/Makefile
+++ b/arch/x86/entry/Makefile
@@ -14,4 +14,5 @@ obj-y += vdso/
obj-y += vsyscall/

obj-$(CONFIG_IA32_EMULATION) += entry_64_compat.o syscall_32.o
+obj-$(CONFIG_X86_X32_ABI) += syscall_x32.o

diff --git a/arch/x86/entry/syscall_64.c b/arch/x86/entry/syscall_64.c
index 058dc1b..efb85c6 100644
--- a/arch/x86/entry/syscall_64.c
+++ b/arch/x86/entry/syscall_64.c
@@ -8,14 +8,13 @@
#include <asm/asm-offsets.h>
#include <asm/syscall.h>

+#define __SYSCALL_X32(nr, sym, qual)
+
#define __SYSCALL_64(nr, sym, qual) extern asmlinkage long sym(const struct pt_regs *);
-#define __SYSCALL_X32(nr, sym, qual) __SYSCALL_64(nr, sym, qual)
#include <asm/syscalls_64.h>
#undef __SYSCALL_64
-#undef __SYSCALL_X32

#define __SYSCALL_64(nr, sym, qual) [nr] = sym,
-#define __SYSCALL_X32(nr, sym, qual)

asmlinkage const sys_call_ptr_t sys_call_table[__NR_syscall_max+1] = {
/*
@@ -25,25 +24,3 @@ asmlinkage const sys_call_ptr_t sys_call_table[__NR_syscall_max+1] = {
[0 ... __NR_syscall_max] = &__x64_sys_ni_syscall,
#include <asm/syscalls_64.h>
};
-
-#undef __SYSCALL_64
-#undef __SYSCALL_X32
-
-#ifdef CONFIG_X86_X32_ABI
-
-#define __SYSCALL_64(nr, sym, qual)
-#define __SYSCALL_X32(nr, sym, qual) [nr] = sym,
-
-asmlinkage const sys_call_ptr_t x32_sys_call_table[__NR_syscall_x32_max+1] = {
- /*
- * Smells like a compiler bug -- it doesn't work
- * when the & below is removed.
- */
- [0 ... __NR_syscall_x32_max] = &__x64_sys_ni_syscall,
-#include <asm/syscalls_64.h>
-};
-
-#undef __SYSCALL_64
-#undef __SYSCALL_X32
-
-#endif
diff --git a/arch/x86/entry/syscall_x32.c b/arch/x86/entry/syscall_x32.c
new file mode 100644
index 0000000..d144ced
--- /dev/null
+++ b/arch/x86/entry/syscall_x32.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0
+/* System call table for x32 ABI. */
+
+#include <linux/linkage.h>
+#include <linux/sys.h>
+#include <linux/cache.h>
+#include <linux/syscalls.h>
+#include <asm/asm-offsets.h>
+#include <asm/syscall.h>
+
+#define __SYSCALL_64(nr, sym, qual)
+
+#define __SYSCALL_X32(nr, sym, qual) extern asmlinkage long sym(const struct pt_regs *);
+#include <asm/syscalls_64.h>
+#undef __SYSCALL_X32
+
+#define __SYSCALL_X32(nr, sym, qual) [nr] = sym,
+
+asmlinkage const sys_call_ptr_t x32_sys_call_table[__NR_syscall_x32_max+1] = {
+ /*
+ * Smells like a compiler bug -- it doesn't work
+ * when the & below is removed.
+ */
+ [0 ... __NR_syscall_x32_max] = &__x64_sys_ni_syscall,
+#include <asm/syscalls_64.h>
+};
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