projects / thirdparty / kernel / stable.git / blame
| Commit | Line | Data |
|---|---|---|
| f27bb139 MZ |
1 | /* |
| 2 | * Copyright (C) 2012 ARM Ltd. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License version 2 as | |
| 6 | * published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope that it will be useful, | |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 11 | * GNU General Public License for more details. | |
| 12 | * | |
| 13 | * You should have received a copy of the GNU General Public License | |
| 14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 15 | */ | |
| 16 | #ifndef __ASM_SYSCALL_H | |
| 17 | #define __ASM_SYSCALL_H | |
| 18 | ||
| 875cbf3e AT |
19 | #include <uapi/linux/audit.h> |
| 20 | #include <linux/compat.h> | |
| f27bb139 MZ |
21 | #include <linux/err.h> |
| 22 | ||
| 4378a7d4 | 23 | typedef long (*syscall_fn_t)(struct pt_regs *regs); |
| 27d83e68 MR |
24 | |
| 25 | extern const syscall_fn_t sys_call_table[]; | |
| f27bb139 | 26 | |
| 3b714275 MR |
27 | #ifdef CONFIG_COMPAT |
| 28 | extern const syscall_fn_t compat_sys_call_table[]; | |
| 29 | #endif | |
| 30 | ||
| f27bb139 MZ |
31 | static inline int syscall_get_nr(struct task_struct *task, |
| 32 | struct pt_regs *regs) | |
| 33 | { | |
| 34 | return regs->syscallno; | |
| 35 | } | |
| 36 | ||
| 37 | static inline void syscall_rollback(struct task_struct *task, | |
| 38 | struct pt_regs *regs) | |
| 39 | { | |
| 40 | regs->regs[0] = regs->orig_x0; | |
| 41 | } | |
| 42 | ||
| 43 | ||
| 44 | static inline long syscall_get_error(struct task_struct *task, | |
| 45 | struct pt_regs *regs) | |
| 46 | { | |
| 47 | unsigned long error = regs->regs[0]; | |
| 48 | return IS_ERR_VALUE(error) ? error : 0; | |
| 49 | } | |
| 50 | ||
| 51 | static inline long syscall_get_return_value(struct task_struct *task, | |
| 52 | struct pt_regs *regs) | |
| 53 | { | |
| 54 | return regs->regs[0]; | |
| 55 | } | |
| 56 | ||
| 57 | static inline void syscall_set_return_value(struct task_struct *task, | |
| 58 | struct pt_regs *regs, | |
| 59 | int error, long val) | |
| 60 | { | |
| 61 | regs->regs[0] = (long) error ? error : val; | |
| 62 | } | |
| 63 | ||
| 64 | #define SYSCALL_MAX_ARGS 6 | |
| 65 | ||
| 66 | static inline void syscall_get_arguments(struct task_struct *task, | |
| 67 | struct pt_regs *regs, | |
| f27bb139 MZ |
68 | unsigned long *args) |
| 69 | { | |
| b35f549d SRRH |
70 | args[0] = regs->orig_x0; |
| 71 | args++; | |
| f27bb139 | 72 | |
| b35f549d | 73 | memcpy(args, ®s->regs[1], 5 * sizeof(args[0])); |
| f27bb139 MZ |
74 | } |
| 75 | ||
| 76 | static inline void syscall_set_arguments(struct task_struct *task, | |
| 77 | struct pt_regs *regs, | |
| f27bb139 MZ |
78 | const unsigned long *args) |
| 79 | { | |
| 32d92586 SRV |
80 | regs->orig_x0 = args[0]; |
| 81 | args++; | |
| 82 | ||
| 83 | memcpy(®s->regs[1], args, 5 * sizeof(args[0])); | |
| f27bb139 MZ |
84 | } |
| 85 | ||
| 875cbf3e AT |
86 | /* |
| 87 | * We don't care about endianness (__AUDIT_ARCH_LE bit) here because | |
| 88 | * AArch64 has the same system calls both on little- and big- endian. | |
| 89 | */ | |
| 90 | static inline int syscall_get_arch(void) | |
| 91 | { | |
| 92 | if (is_compat_task()) | |
| 93 | return AUDIT_ARCH_ARM; | |
| 94 | ||
| 95 | return AUDIT_ARCH_AARCH64; | |
| 96 | } | |
| 97 | ||
| f27bb139 | 98 | #endif /* __ASM_SYSCALL_H */ |