arch/openrisc/include/asm/syscall.h

   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, &regs->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(&regs->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