Commit 454d7ef8 authored by Michael Ellerman's avatar Michael Ellerman

powerpc/syscalls: Add COMPAT_SPU_NEW() macro

Currently the select system call is wired up with the SYSX_SPU()
macro. The SYSX_SPU() is not handled by systbl_chk.c, which means the
syscall number for select is not checked.

That hides the fact that the syscall number for select is actually
__NR__newselect not __NR_select.

In a following patch we'd like to drop ppc32_select() which means
select will become a regular COMPAT_SYS_SPU() syscall. But
COMPAT_SYS_SPU() can't deal with the fact that the syscall number is
actually __NR__newselect. We also can't just redefine __NR_select
because that's still used for the old select call.

So add a new COMPAT_NEW_SPU() that does the same thing as
COMPAT_SYS_SPU() except it encodes that we're using the new number.
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 4c392e65
......@@ -35,6 +35,7 @@
#endif
#define SYSCALL_SPU(func) SYSCALL(func)
#define COMPAT_SYS_SPU(func) COMPAT_SYS(func)
#define COMPAT_SPU_NEW(func) COMPAT_SYS(func)
#define SYSX_SPU(f, f3264, f32) SYSX(f, f3264, f32)
.section .rodata,"a"
......
......@@ -31,6 +31,7 @@
#define SYSCALL_SPU(func) SYSCALL(func)
#define COMPAT_SYS_SPU(func) COMPAT_SYS(func)
#define COMPAT_SPU_NEW(func) COMPAT_SYS(_new##func)
#define SYSX_SPU(f, f3264, f32) SYSX(f, f3264, f32)
/* Just insert a marker for ni_syscalls */
......
......@@ -44,6 +44,7 @@ static void *spu_syscall_table[] = {
#define SYSCALL_SPU(func) sys_##func,
#define COMPAT_SYS_SPU(func) sys_##func,
#define COMPAT_SPU_NEW(func) sys_##func,
#define SYSX_SPU(f, f3264, f32) f,
#include <asm/systbl.h>
......
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