e2c0cdfba7
This patch contains code that is in some way visible to the user: including via system calls, the VDSO, module loading and signal handling. It also contains some generic code that is ABI visible. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/*
|
|
* Copyright (C) 2012 ARM Limited
|
|
* Copyright (C) 2014 Regents of the University of California
|
|
* Copyright (C) 2017 SiFive
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef _ASM_RISCV_VDSO_H
|
|
#define _ASM_RISCV_VDSO_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct vdso_data {
|
|
};
|
|
|
|
/*
|
|
* 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 availiable.
|
|
*/
|
|
#define VDSO_SYMBOL(base, name) \
|
|
({ \
|
|
extern const char __vdso_##name[]; \
|
|
(void __user *)((unsigned long)(base) + __vdso_##name); \
|
|
})
|
|
|
|
#endif /* _ASM_RISCV_VDSO_H */
|