68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
||
|
|
/*
|
||
|
|
* Access to user system call parameters and results
|
||
|
|
*
|
||
|
|
* See asm-generic/syscall.h for function descriptions.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2015 Mickaël Salaün <mic@digikod.net>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __UM_SYSCALL_GENERIC_H
|
||
|
|
#define __UM_SYSCALL_GENERIC_H
|
||
|
|
|
||
|
|
#include <asm/ptrace.h>
|
||
|
|
#include <linux/err.h>
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include <sysdep/ptrace.h>
|
||
|
|
|
||
|
|
static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
|
||
|
|
return PT_REGS_SYSCALL_NR(regs);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void syscall_rollback(struct task_struct *task,
|
||
|
|
struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
/* do nothing */
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long syscall_get_error(struct task_struct *task,
|
||
|
|
struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
const long error = regs_return_value(regs);
|
||
|
|
|
||
|
|
return IS_ERR_VALUE(error) ? error : 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long syscall_get_return_value(struct task_struct *task,
|
||
|
|
struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
return regs_return_value(regs);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void syscall_set_return_value(struct task_struct *task,
|
||
|
|
struct pt_regs *regs,
|
||
|
|
int error, long val)
|
||
|
|
{
|
||
|
|
PT_REGS_SET_SYSCALL_RETURN(regs, (long) error ?: val);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void syscall_get_arguments(struct task_struct *task,
|
||
|
|
struct pt_regs *regs,
|
||
|
|
unsigned long *args)
|
||
|
|
{
|
||
|
|
const struct uml_pt_regs *r = ®s->regs;
|
||
|
|
|
||
|
|
*args++ = UPT_SYSCALL_ARG1(r);
|
||
|
|
*args++ = UPT_SYSCALL_ARG2(r);
|
||
|
|
*args++ = UPT_SYSCALL_ARG3(r);
|
||
|
|
*args++ = UPT_SYSCALL_ARG4(r);
|
||
|
|
*args++ = UPT_SYSCALL_ARG5(r);
|
||
|
|
*args = UPT_SYSCALL_ARG6(r);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* See arch/x86/um/asm/syscall.h for syscall_get_arch() definition. */
|
||
|
|
|
||
|
|
#endif /* __UM_SYSCALL_GENERIC_H */
|