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 <uapi/linux/audit.h> 23 #include <linux/err.h> 24 #include <linux/sched.h> 25 26 static inline int 27 syscall_get_nr(struct task_struct *task, struct pt_regs *regs) 28 { 29 return regs->orig_gpr11; 30 } 31 32 static inline void 33 syscall_rollback(struct task_struct *task, struct pt_regs *regs) 34 { 35 regs->gpr[11] = regs->orig_gpr11; 36 } 37 38 static inline long 39 syscall_get_error(struct task_struct *task, struct pt_regs *regs) 40 { 41 return IS_ERR_VALUE(regs->gpr[11]) ? regs->gpr[11] : 0; 42 } 43 44 static inline long 45 syscall_get_return_value(struct task_struct *task, struct pt_regs *regs) 46 { 47 return regs->gpr[11]; 48 } 49 50 static inline void 51 syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, 52 int error, long val) 53 { 54 regs->gpr[11] = (long) error ?: val; 55 } 56 57 static inline void 58 syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, 59 unsigned int i, unsigned int n, unsigned long *args) 60 { 61 BUG_ON(i + n > 6); 62 63 memcpy(args, ®s->gpr[3 + i], n * sizeof(args[0])); 64 } 65 66 static inline void 67 syscall_set_arguments(struct task_struct *task, struct pt_regs *regs, 68 unsigned int i, unsigned int n, const unsigned long *args) 69 { 70 BUG_ON(i + n > 6); 71 72 memcpy(®s->gpr[3 + i], args, n * sizeof(args[0])); 73 } 74 75 static inline int syscall_get_arch(void) 76 { 77 return AUDIT_ARCH_OPENRISC; 78 } 79 #endif 80