Viewing file:  syscall.h (2.2 KB) -rw-r--r--
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/*
* Copyright (C) 2011 Texas Instruments Incorporated
* Author: Mark Salter <msalter@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __ASM_C6X_SYSCALL_H
#define __ASM_C6X_SYSCALL_H
#include <linux/err.h>
#include <linux/sched.h>
static inline int syscall_get_nr(struct task_struct *task,
struct pt_regs *regs)
{
return regs->b0;
}
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)
{
return IS_ERR_VALUE(regs->a4) ? regs->a4 : 0;
}
static inline long syscall_get_return_value(struct task_struct *task,
struct pt_regs *regs)
{
return regs->a4;
}
static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs,
int error, long val)
{
regs->a4 = error ?: val;
}
static inline void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs, unsigned int i,
unsigned int n, unsigned long *args)
{
switch (i) {
case 0:
if (!n--)
break;
*args++ = regs->a4;
case 1:
if (!n--)
break;
*args++ = regs->b4;
case 2:
if (!n--)
break;
*args++ = regs->a6;
case 3:
if (!n--)
break;
*args++ = regs->b6;
case 4:
if (!n--)
break;
*args++ = regs->a8;
case 5:
if (!n--)
break;
*args++ = regs->b8;
case 6:
if (!n--)
break;
default:
BUG();
}
}
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned int i, unsigned int n,
const unsigned long *args)
{
switch (i) {
case 0:
if (!n--)
break;
regs->a4 = *args++;
case 1:
if (!n--)
break;
regs->b4 = *args++;
case 2:
if (!n--)
break;
regs->a6 = *args++;
case 3:
if (!n--)
break;
regs->b6 = *args++;
case 4:
if (!n--)
break;
regs->a8 = *args++;
case 5:
if (!n--)
break;
regs->a9 = *args++;
case 6:
if (!n)
break;
default:
BUG();
}
}
#endif /* __ASM_C6X_SYSCALLS_H */
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