cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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syscall.h (1478B)

      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 int syscall_get_arch(struct task_struct *task)
     61{
     62	return AUDIT_ARCH_OPENRISC;
     63}
     64#endif