LXR linux/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
  26static inline int
  27syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
  28{
  29        return regs->orig_gpr11;
  30}
  31
  32static inline void
  33syscall_rollback(struct task_struct *task, struct pt_regs *regs)
  34{
  35        regs->gpr[11] = regs->orig_gpr11;
  36}
  37
  38static inline long
  39syscall_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
  44static inline long
  45syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
  46{
  47        return regs->gpr[11];
  48}
  49
  50static inline void
  51syscall_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
  57static inline void
  58syscall_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
  66static inline void
  67syscall_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
  75static inline int syscall_get_arch(void)
  76{
  77        return AUDIT_ARCH_OPENRISC;
  78}
  79#endif
  80