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 78