| /* SPDX-License-Identifier: GPL-2.0 */ | |
| #ifndef __ASM_CSKY_VDSO_H | |
| #define __ASM_CSKY_VDSO_H | |
| #include <linux/types.h> | |
| /* | |
| * The VDSO symbols are mapped into Linux so we can just use regular symbol | |
| * addressing to get their offsets in userspace. The symbols are mapped at an | |
| * offset of 0, but since the linker must support setting weak undefined | |
| * symbols to the absolute address 0 it also happens to support other low | |
| * addresses even when the code model suggests those low addresses would not | |
| * otherwise be available. | |
| */ | |
| #define VDSO_SYMBOL(base, name) \ | |
| ({ \ | |
| extern const char __vdso_##name[]; \ | |
| (void __user *)((unsigned long)(base) + __vdso_##name); \ | |
| }) | |
| #endif /* __ASM_CSKY_VDSO_H */ |