1 /* 2 * OpenRISC Linux 3 * 4 * Linux architectural port borrowing liberally from similar works of 5 * others. All original copyrights apply as per the original source 6 * declaration. 7 * 8 * OpenRISC implementation: 9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> 10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> 11 * et al. 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 */ 18 19 #ifndef __ASM_OPENRISC_SYSCALL_H__ 20 #define __ASM_OPENRISC_SYSCALL_H__ 21 22 #include <linux/err.h> 23 #include <linux/sched.h> 24 25 static inline int 26 syscall_get_nr(struct task_struct *task, struct pt_regs *regs) 27 { 28 return regs->syscallno ? regs->syscallno : -1; 29 } 30 31 static inline void 32 syscall_rollback(struct task_struct *task, struct pt_regs *regs) 33 { 34 regs->gpr[11] = regs->orig_gpr11; 35 } 36 37 static inline long 38 syscall_get_error(struct task_struct *task, struct pt_regs *regs) 39 { 40 return IS_ERR_VALUE(regs->gpr[11]) ? regs->gpr[11] : 0; 41 } 42 43 static inline long 44 syscall_get_return_value(struct task_struct *task, struct pt_regs *regs) 45 { 46 return regs->gpr[11]; 47 } 48 49 static inline void 50 syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, 51 int error, long val) 52 { 53 if (error) 54 regs->gpr[11] = -error; 55 else 56 regs->gpr[11] = val; 57 } 58 59 static inline void 60 syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, 61 unsigned int i, unsigned int n, unsigned long *args) 62 { 63 BUG_ON(i + n > 6); 64 65 memcpy(args, ®s->gpr[3 + i], n * sizeof(args[0])); 66 } 67 68 static inline void 69 syscall_set_arguments(struct task_struct *task, struct pt_regs *regs, 70 unsigned int i, unsigned int n, const unsigned long *args) 71 { 72 BUG_ON(i + n > 6); 73 74 memcpy(®s->gpr[3 + i], args, n * sizeof(args[0])); 75 } 76 77 #endif 78