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 (1697B)

      1/* SPDX-License-Identifier: GPL-2.0+ */
      2/*
      3 * Author: Hanlu Li <lihanlu@loongson.cn>
      4 *         Huacai Chen <chenhuacai@loongson.cn>
      5 *
      6 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
      7 */
      8
      9#ifndef __ASM_LOONGARCH_SYSCALL_H
     10#define __ASM_LOONGARCH_SYSCALL_H
     11
     12#include <linux/compiler.h>
     13#include <uapi/linux/audit.h>
     14#include <linux/elf-em.h>
     15#include <linux/kernel.h>
     16#include <linux/sched.h>
     17#include <linux/uaccess.h>
     18#include <asm/ptrace.h>
     19#include <asm/unistd.h>
     20
     21extern void *sys_call_table[];
     22
     23static inline long syscall_get_nr(struct task_struct *task,
     24				  struct pt_regs *regs)
     25{
     26	return regs->regs[11];
     27}
     28
     29static inline void syscall_rollback(struct task_struct *task,
     30				    struct pt_regs *regs)
     31{
     32        regs->regs[4] = regs->orig_a0;
     33}
     34
     35static inline long syscall_get_error(struct task_struct *task,
     36				     struct pt_regs *regs)
     37{
     38	unsigned long error = regs->regs[4];
     39
     40	return IS_ERR_VALUE(error) ? error : 0;
     41}
     42
     43static inline long syscall_get_return_value(struct task_struct *task,
     44					    struct pt_regs *regs)
     45{
     46	return regs->regs[4];
     47}
     48
     49static inline void syscall_set_return_value(struct task_struct *task,
     50					    struct pt_regs *regs,
     51					    int error, long val)
     52{
     53	regs->regs[4] = (long) error ? error : val;
     54}
     55
     56static inline void syscall_get_arguments(struct task_struct *task,
     57					 struct pt_regs *regs,
     58					 unsigned long *args)
     59{
     60	args[0] = regs->orig_a0;
     61	memcpy(&args[1], &regs->regs[5], 5 * sizeof(long));
     62}
     63
     64static inline int syscall_get_arch(struct task_struct *task)
     65{
     66	return AUDIT_ARCH_LOONGARCH64;
     67}
     68
     69static inline bool arch_syscall_is_vdso_sigreturn(struct pt_regs *regs)
     70{
     71	return false;
     72}
     73
     74#endif	/* __ASM_LOONGARCH_SYSCALL_H */