diff options
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 5 | ||||
| -rw-r--r-- | arch/powerpc/kernel/syscalls.c | 17 | ||||
| -rw-r--r-- | arch/powerpc/kernel/systbl.S | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/systbl_chk.c | 2 |
4 files changed, 26 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index d180caf2d6de..afbc20019c2e 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -356,6 +356,11 @@ _GLOBAL(ppc64_swapcontext) bl sys_swapcontext b .Lsyscall_exit +_GLOBAL(ppc_switch_endian) + bl save_nvgprs + bl sys_switch_endian + b .Lsyscall_exit + _GLOBAL(ret_from_fork) bl schedule_tail REST_NVGPRS(r1) diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c index b2702e87db0d..5fa92706444b 100644 --- a/arch/powerpc/kernel/syscalls.c +++ b/arch/powerpc/kernel/syscalls.c @@ -121,3 +121,20 @@ long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low, return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, (u64)len_high << 32 | len_low, advice); } + +long sys_switch_endian(void) +{ + struct thread_info *ti; + + current->thread.regs->msr ^= MSR_LE; + + /* + * Set TIF_RESTOREALL so that r3 isn't clobbered on return to + * userspace. That also has the effect of restoring the non-volatile + * GPRs, so we saved them on the way in here. + */ + ti = current_thread_info(); + ti->flags |= _TIF_RESTOREALL; + + return 0; +} diff --git a/arch/powerpc/kernel/systbl.S b/arch/powerpc/kernel/systbl.S index 7ab5d434e2ee..4d6b1d3a747f 100644 --- a/arch/powerpc/kernel/systbl.S +++ b/arch/powerpc/kernel/systbl.S @@ -22,6 +22,7 @@ #define PPC_SYS(func) .llong DOTSYM(ppc_##func),DOTSYM(ppc_##func) #define OLDSYS(func) .llong DOTSYM(sys_ni_syscall),DOTSYM(sys_ni_syscall) #define SYS32ONLY(func) .llong DOTSYM(sys_ni_syscall),DOTSYM(compat_sys_##func) +#define PPC64ONLY(func) .llong DOTSYM(ppc_##func),DOTSYM(sys_ni_syscall) #define SYSX(f, f3264, f32) .llong DOTSYM(f),DOTSYM(f3264) #else #define SYSCALL(func) .long sys_##func @@ -29,6 +30,7 @@ #define PPC_SYS(func) .long ppc_##func #define OLDSYS(func) .long sys_##func #define SYS32ONLY(func) .long sys_##func +#define PPC64ONLY(func) .long sys_ni_syscall #define SYSX(f, f3264, f32) .long f32 #endif #define SYSCALL_SPU(func) SYSCALL(func) diff --git a/arch/powerpc/kernel/systbl_chk.c b/arch/powerpc/kernel/systbl_chk.c index 238aa63ced8f..2384129f5893 100644 --- a/arch/powerpc/kernel/systbl_chk.c +++ b/arch/powerpc/kernel/systbl_chk.c @@ -21,9 +21,11 @@ #ifdef CONFIG_PPC64 #define OLDSYS(func) -1 #define SYS32ONLY(func) -1 +#define PPC64ONLY(func) __NR_##func #else #define OLDSYS(func) __NR_old##func #define SYS32ONLY(func) __NR_##func +#define PPC64ONLY(func) -1 #endif #define SYSX(f, f3264, f32) -1 |