diff options
Diffstat (limited to 'arch/powerpc/include/asm/vdso/getrandom.h')
| -rw-r--r-- | arch/powerpc/include/asm/vdso/getrandom.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/vdso/getrandom.h b/arch/powerpc/include/asm/vdso/getrandom.h index 501d6bb14e8a..067a5396aac6 100644 --- a/arch/powerpc/include/asm/vdso/getrandom.h +++ b/arch/powerpc/include/asm/vdso/getrandom.h @@ -7,6 +7,8 @@ #ifndef __ASSEMBLY__ +#include <asm/vdso_datapage.h> + static __always_inline int do_syscall_3(const unsigned long _r0, const unsigned long _r3, const unsigned long _r4, const unsigned long _r5) { @@ -41,13 +43,24 @@ static __always_inline ssize_t getrandom_syscall(void *buffer, size_t len, unsig (unsigned long)len, (unsigned long)flags); } -static __always_inline struct vdso_rng_data *__arch_get_vdso_rng_data(void) +static __always_inline const struct vdso_rng_data *__arch_get_vdso_u_rng_data(void) { - return NULL; + struct vdso_rng_data *data; + + asm ( + " bcl 20, 31, .+4 ;" + "0: mflr %0 ;" + " addis %0, %0, (vdso_u_rng_data - 0b)@ha ;" + " addi %0, %0, (vdso_u_rng_data - 0b)@l ;" + : "=r" (data) : : "lr" + ); + + return data; } +#define __arch_get_vdso_u_rng_data __arch_get_vdso_u_rng_data ssize_t __c_kernel_getrandom(void *buffer, size_t len, unsigned int flags, void *opaque_state, - size_t opaque_len, const struct vdso_rng_data *vd); + size_t opaque_len); #endif /* !__ASSEMBLY__ */ |