89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
|
/*
|
||
|
|
* Access to user system call parameters and results
|
||
|
|
*
|
||
|
|
* Copyright (C) 2008 Intel Corp. Shaohua Li <shaohua.li@intel.com>
|
||
|
|
*
|
||
|
|
* This copyrighted material is made available to anyone wishing to use,
|
||
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
||
|
|
* of the GNU General Public License v.2.
|
||
|
|
*
|
||
|
|
* See asm-generic/syscall.h for descriptions of what we must do here.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _ASM_SYSCALL_H
|
||
|
|
#define _ASM_SYSCALL_H 1
|
||
|
|
|
||
|
|
#include <uapi/linux/audit.h>
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include <linux/err.h>
|
||
|
|
|
||
|
|
static inline long syscall_get_nr(struct task_struct *task,
|
||
|
|
struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
if ((long)regs->cr_ifs < 0) /* Not a syscall */
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
return regs->r15;
|
||
|
|
}
|
||
|
|
|
||
|
|
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 regs->r10 == -1 ? regs->r8:0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long syscall_get_return_value(struct task_struct *task,
|
||
|
|
struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
return regs->r8;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void syscall_set_return_value(struct task_struct *task,
|
||
|
|
struct pt_regs *regs,
|
||
|
|
int error, long val)
|
||
|
|
{
|
||
|
|
if (error) {
|
||
|
|
/* error < 0, but ia64 uses > 0 return value */
|
||
|
|
regs->r8 = -error;
|
||
|
|
regs->r10 = -1;
|
||
|
|
} else {
|
||
|
|
regs->r8 = val;
|
||
|
|
regs->r10 = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
extern void ia64_syscall_get_set_arguments(struct task_struct *task,
|
||
|
|
struct pt_regs *regs, unsigned int i, unsigned int n,
|
||
|
|
unsigned long *args, int rw);
|
||
|
|
static inline void syscall_get_arguments(struct task_struct *task,
|
||
|
|
struct pt_regs *regs,
|
||
|
|
unsigned int i, unsigned int n,
|
||
|
|
unsigned long *args)
|
||
|
|
{
|
||
|
|
BUG_ON(i + n > 6);
|
||
|
|
|
||
|
|
ia64_syscall_get_set_arguments(task, regs, i, n, args, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void syscall_set_arguments(struct task_struct *task,
|
||
|
|
struct pt_regs *regs,
|
||
|
|
unsigned int i, unsigned int n,
|
||
|
|
unsigned long *args)
|
||
|
|
{
|
||
|
|
BUG_ON(i + n > 6);
|
||
|
|
|
||
|
|
ia64_syscall_get_set_arguments(task, regs, i, n, args, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int syscall_get_arch(void)
|
||
|
|
{
|
||
|
|
return AUDIT_ARCH_IA64;
|
||
|
|
}
|
||
|
|
#endif /* _ASM_SYSCALL_H */
|