diff options
| author | Guo Ren <ren_guo@c-sky.com> | 2018-09-05 14:25:14 +0800 |
|---|---|---|
| committer | Guo Ren <ren_guo@c-sky.com> | 2018-10-26 00:54:22 +0800 |
| commit | dd3ef10ea295f8f4181e6044fb19444cad7c6aab (patch) | |
| tree | a866e02f173967c81798428d64a8b0f3f9c8cd6a /arch/csky/abiv1 | |
| parent | e9564df753fd547fcbcd4fd10015c3b1213ef452 (diff) | |
csky: VDSO and rt_sigreturn
This patch adds files related to VDSO and our VDSO only support
rt_sigreturn.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/csky/abiv1')
| -rw-r--r-- | arch/csky/abiv1/inc/abi/vdso.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/csky/abiv1/inc/abi/vdso.h b/arch/csky/abiv1/inc/abi/vdso.h new file mode 100644 index 000000000000..14352f524f1d --- /dev/null +++ b/arch/csky/abiv1/inc/abi/vdso.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include <linux/uaccess.h> + +static inline int setup_vdso_page(unsigned short *ptr) +{ + int err = 0; + + /* movi r1, 127 */ + err |= __put_user(0x67f1, ptr + 0); + /* addi r1, (139 - 127) */ + err |= __put_user(0x20b1, ptr + 1); + /* trap 0 */ + err |= __put_user(0x0008, ptr + 2); + + return err; +} |