LXR linux/arch/openrisc/include/asm/syscall.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * OpenRISC Linux
   4 *
   5 * Linux architectural port borrowing liberally from similar works of
   6 * others.  All original copyrights apply as per the original source
   7 * declaration.
   8 *
   9 * OpenRISC implementation:
  10 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
  11 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  12 * et al.
  13 */
  14
  15#ifndef __ASM_OPENRISC_SYSCALL_H__
  16#define __ASM_OPENRISC_SYSCALL_H__
  17
  18#include <uapi/linux/audit.h>
  19#include <linux/err.h>
  20#include <linux/sched.h>
  21
  22static inline int
  23syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
  24{
  25        return regs->orig_gpr11;
  26}
  27
  28static inline void
  29syscall_rollback(struct task_struct *task, struct pt_regs *regs)
  30{
  31        regs->gpr[11] = regs->orig_gpr11;
  32}
  33
  34static inline long
  35syscall_get_error(struct task_struct *task, struct pt_regs *regs)
  36{
  37        return IS_ERR_VALUE(regs->gpr[11]) ? regs->gpr[11] : 0;
  38}
  39
  40static inline long
  41syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
  42{
  43        return regs->gpr[11];
  44}
  45
  46static inline void
  47syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
  48                         int error, long val)
  49{
  50        regs->gpr[11] = (long) error ?: val;
  51}
  52
  53static inline void
  54syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
  55                      unsigned long *args)
  56{
  57        memcpy(args, &regs->gpr[3], 6 * sizeof(args[0]));
  58}
  59
  60static inline void
  61syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
  62                      const unsigned long *args)
  63{
  64        memcpy(&regs->gpr[3], args, 6 * sizeof(args[0]));
  65}
  66
  67static inline int syscall_get_arch(struct task_struct *task)
  68{
  69        return AUDIT_ARCH_OPENRISC;
  70}
  71#endif
  72