aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorAndy Lutomirski <luto@kernel.org>2016-01-28 15:11:22 -0800
committerIngo Molnar <mingo@kernel.org>2016-01-29 09:46:37 +0100
commit32324ce15ea8cb4c8acc28acb2fd36fabf73e9db (patch)
treeb9293fb66ab0b59c779aae7e056be59c8f431c23 /arch
parentfba324744bfd2a7948a7710d7a021d76dafb9b67 (diff)
downloadlinux-32324ce15ea8cb4c8acc28acb2fd36fabf73e9db.tar.gz
x86/syscalls: Remove __SYSCALL_COMMON and __SYSCALL_X32
The common/64/x32 distinction has no effect other than determining which kernels actually support the syscall. Move the logic into syscalltbl.sh. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/58d4a95f40e43b894f93288b4a3633963d0ee22e.1454022279.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/entry/syscall_64.c8
-rw-r--r--arch/x86/entry/syscalls/syscalltbl.sh17
-rw-r--r--arch/x86/kernel/asm-offsets_64.c6
-rw-r--r--arch/x86/um/sys_call_table_64.c3
-rw-r--r--arch/x86/um/user-offsets.c2
5 files changed, 16 insertions, 20 deletions
diff --git a/arch/x86/entry/syscall_64.c b/arch/x86/entry/syscall_64.c
index 41283d22be7a..974fd89ac806 100644
--- a/arch/x86/entry/syscall_64.c
+++ b/arch/x86/entry/syscall_64.c
@@ -6,14 +6,6 @@
#include <asm/asm-offsets.h>
#include <asm/syscall.h>
-#define __SYSCALL_COMMON(nr, sym, compat) __SYSCALL_64(nr, sym, compat)
-
-#ifdef CONFIG_X86_X32_ABI
-# define __SYSCALL_X32(nr, sym, compat) __SYSCALL_64(nr, sym, compat)
-#else
-# define __SYSCALL_X32(nr, sym, compat) /* nothing */
-#endif
-
#define __SYSCALL_64(nr, sym, compat) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
#include <asm/syscalls_64.h>
#undef __SYSCALL_64
diff --git a/arch/x86/entry/syscalls/syscalltbl.sh b/arch/x86/entry/syscalls/syscalltbl.sh
index 167965ee742e..5ebeaf1041e7 100644
--- a/arch/x86/entry/syscalls/syscalltbl.sh
+++ b/arch/x86/entry/syscalls/syscalltbl.sh
@@ -18,6 +18,21 @@ emit() {
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"
+ if [ "$abi" == "COMMON" -o "$abi" == "64" ]; then
+ # COMMON is the same as 64, except that we don't expect X32
+ # programs to use it. Our expectation has nothing to do with
+ # any generated code, so treat them the same.
+ emit 64 "$nr" "$entry" "$compat"
+ elif [ "$abi" == "X32" ]; then
+ # X32 is equivalent to 64 on an X32-compatible kernel.
+ echo "#ifdef CONFIG_X86_X32_ABI"
+ emit 64 "$nr" "$entry" "$compat"
+ echo "#endif"
+ elif [ "$abi" == "I386" ]; then
+ emit "$abi" "$nr" "$entry" "$compat"
+ else
+ echo "Unknown abi $abi" >&2
+ exit 1
+ fi
done
) > "$out"
diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c
index f2edafb5f24e..29db3b3f550c 100644
--- a/arch/x86/kernel/asm-offsets_64.c
+++ b/arch/x86/kernel/asm-offsets_64.c
@@ -5,12 +5,6 @@
#include <asm/ia32.h>
#define __SYSCALL_64(nr, sym, compat) [nr] = 1,
-#define __SYSCALL_COMMON(nr, sym, compat) [nr] = 1,
-#ifdef CONFIG_X86_X32_ABI
-# define __SYSCALL_X32(nr, sym, compat) [nr] = 1,
-#else
-# define __SYSCALL_X32(nr, sym, compat) /* nothing */
-#endif
static char syscalls_64[] = {
#include <asm/syscalls_64.h>
};
diff --git a/arch/x86/um/sys_call_table_64.c b/arch/x86/um/sys_call_table_64.c
index b74ea6c2c0e7..71a497cde921 100644
--- a/arch/x86/um/sys_call_table_64.c
+++ b/arch/x86/um/sys_call_table_64.c
@@ -35,9 +35,6 @@
#define stub_execveat sys_execveat
#define stub_rt_sigreturn sys_rt_sigreturn
-#define __SYSCALL_COMMON(nr, sym, compat) __SYSCALL_64(nr, sym, compat)
-#define __SYSCALL_X32(nr, sym, compat) /* Not supported */
-
#define __SYSCALL_64(nr, sym, compat) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
#include <asm/syscalls_64.h>
diff --git a/arch/x86/um/user-offsets.c b/arch/x86/um/user-offsets.c
index ce7e3607a870..5edf4f4bbf53 100644
--- a/arch/x86/um/user-offsets.c
+++ b/arch/x86/um/user-offsets.c
@@ -15,8 +15,6 @@ static char syscalls[] = {
};
#else
#define __SYSCALL_64(nr, sym, compat) [nr] = 1,
-#define __SYSCALL_COMMON(nr, sym, compat) [nr] = 1,
-#define __SYSCALL_X32(nr, sym, compat) /* Not supported */
static char syscalls[] = {
#include <asm/syscalls_64.h>
};