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| author | Michael Ellerman <mpe@ellerman.id.au> | 2018-05-02 16:20:49 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-05-10 16:25:14 +0300 |
| commit | 454d7ef81ad2dc3be2bede61f0703f0e69f21dd3 (patch) | |
| tree | 1bb421f5972a2ca08e8df92e8c5db2615a02aad3 /arch/powerpc/kernel/systbl.S | |
| parent | 4c392e6591e3257ebd08210e1ac0a175eefd0168 (diff) | |
| download | linux-454d7ef81ad2dc3be2bede61f0703f0e69f21dd3.tar.xz | |
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: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/systbl.S')
| -rw-r--r-- | arch/powerpc/kernel/systbl.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/systbl.S b/arch/powerpc/kernel/systbl.S index c7d5216d91d7..919a32746ede 100644 --- a/arch/powerpc/kernel/systbl.S +++ b/arch/powerpc/kernel/systbl.S @@ -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" |