tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef __ASM_CSKY_VDSO_H
4#define __ASM_CSKY_VDSO_H
5
6#include <linux/types.h>
7
8/*
9 * The VDSO symbols are mapped into Linux so we can just use regular symbol
10 * addressing to get their offsets in userspace. The symbols are mapped at an
11 * offset of 0, but since the linker must support setting weak undefined
12 * symbols to the absolute address 0 it also happens to support other low
13 * addresses even when the code model suggests those low addresses would not
14 * otherwise be available.
15 */
16#define VDSO_SYMBOL(base, name) \
17({ \
18 extern const char __vdso_##name[]; \
19 (void __user *)((unsigned long)(base) + __vdso_##name); \
20})
21
22#endif /* __ASM_CSKY_VDSO_H */