| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | /* |
| 3 | * Copyright Altera Corporation (C) <2014>. All rights reserved |
| 4 | */ |
| 5 | |
| 6 | #ifndef __ASM_NIOS2_SYSCALL_H__ |
| 7 | #define __ASM_NIOS2_SYSCALL_H__ |
| 8 | |
| 9 | #include <uapi/linux/audit.h> |
| 10 | #include <linux/err.h> |
| 11 | #include <linux/sched.h> |
| 12 | |
| 13 | static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) |
| 14 | { |
| 15 | return regs->r2; |
| 16 | } |
| 17 | |
| 18 | static inline void syscall_rollback(struct task_struct *task, |
| 19 | struct pt_regs *regs) |
| 20 | { |
| 21 | regs->r2 = regs->orig_r2; |
| 22 | regs->r7 = regs->orig_r7; |
| 23 | } |
| 24 | |
| 25 | static inline long syscall_get_error(struct task_struct *task, |
| 26 | struct pt_regs *regs) |
| 27 | { |
| 28 | return regs->r7 ? regs->r2 : 0; |
| 29 | } |
| 30 | |
| 31 | static inline long syscall_get_return_value(struct task_struct *task, |
| 32 | struct pt_regs *regs) |
| 33 | { |
| 34 | return regs->r2; |
| 35 | } |
| 36 | |
| 37 | static inline void syscall_set_return_value(struct task_struct *task, |
| 38 | struct pt_regs *regs, int error, long val) |
| 39 | { |
| 40 | if (error) { |
| 41 | /* error < 0, but nios2 uses > 0 return value */ |
| 42 | regs->r2 = -error; |
| 43 | regs->r7 = 1; |
| 44 | } else { |
| 45 | regs->r2 = val; |
| 46 | regs->r7 = 0; |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | static inline void syscall_get_arguments(struct task_struct *task, |
| 51 | struct pt_regs *regs, unsigned long *args) |
| 52 | { |
| 53 | *args++ = regs->r4; |
| 54 | *args++ = regs->r5; |
| 55 | *args++ = regs->r6; |
| 56 | *args++ = regs->r7; |
| 57 | *args++ = regs->r8; |
| 58 | *args = regs->r9; |
| 59 | } |
| 60 | |
| 61 | static inline void syscall_set_arguments(struct task_struct *task, |
| 62 | struct pt_regs *regs, const unsigned long *args) |
| 63 | { |
| 64 | regs->r4 = *args++; |
| 65 | regs->r5 = *args++; |
| 66 | regs->r6 = *args++; |
| 67 | regs->r7 = *args++; |
| 68 | regs->r8 = *args++; |
| 69 | regs->r9 = *args; |
| 70 | } |
| 71 | |
| 72 | static inline int syscall_get_arch(struct task_struct *task) |
| 73 | { |
| 74 | return AUDIT_ARCH_NIOS2; |
| 75 | } |
| 76 | |
| 77 | #endif |