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-generic.h (1612B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Access to user system call parameters and results
      4 *
      5 * See asm-generic/syscall.h for function descriptions.
      6 *
      7 * Copyright (C) 2015 Mickaël Salaün <mic@digikod.net>
      8 */
      9
     10#ifndef __UM_SYSCALL_GENERIC_H
     11#define __UM_SYSCALL_GENERIC_H
     12
     13#include <asm/ptrace.h>
     14#include <linux/err.h>
     15#include <linux/sched.h>
     16#include <sysdep/ptrace.h>
     17
     18static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
     19{
     20
     21	return PT_REGS_SYSCALL_NR(regs);
     22}
     23
     24static inline void syscall_rollback(struct task_struct *task,
     25				    struct pt_regs *regs)
     26{
     27	/* do nothing */
     28}
     29
     30static inline long syscall_get_error(struct task_struct *task,
     31				     struct pt_regs *regs)
     32{
     33	const long error = regs_return_value(regs);
     34
     35	return IS_ERR_VALUE(error) ? error : 0;
     36}
     37
     38static inline long syscall_get_return_value(struct task_struct *task,
     39					    struct pt_regs *regs)
     40{
     41	return regs_return_value(regs);
     42}
     43
     44static inline void syscall_set_return_value(struct task_struct *task,
     45					    struct pt_regs *regs,
     46					    int error, long val)
     47{
     48	PT_REGS_SET_SYSCALL_RETURN(regs, (long) error ?: val);
     49}
     50
     51static inline void syscall_get_arguments(struct task_struct *task,
     52					 struct pt_regs *regs,
     53					 unsigned long *args)
     54{
     55	const struct uml_pt_regs *r = &regs->regs;
     56
     57	*args++ = UPT_SYSCALL_ARG1(r);
     58	*args++ = UPT_SYSCALL_ARG2(r);
     59	*args++ = UPT_SYSCALL_ARG3(r);
     60	*args++ = UPT_SYSCALL_ARG4(r);
     61	*args++ = UPT_SYSCALL_ARG5(r);
     62	*args   = UPT_SYSCALL_ARG6(r);
     63}
     64
     65/* See arch/x86/um/asm/syscall.h for syscall_get_arch() definition. */
     66
     67#endif	/* __UM_SYSCALL_GENERIC_H */