| /* |
| * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #ifndef _ASM_SYSCALL_H |
| #define _ASM_SYSCALL_H 1 |
| |
| #include <asm/unistd.h> // NR_syscalls |
| #include <asm/ptrace.h> // in_syscall() |
| |
| static inline long syscall_get_nr(struct task_struct *task, |
| struct pt_regs *regs) |
| { |
| if (user_mode(regs) && in_syscall(regs)) |
| return regs->orig_r8; |
| else |
| return -1; |
| } |
| |
| /* |
| * @i: argument index [0,5] |
| * @n: number of arguments; n+i must be [1,6]. |
| */ |
| static inline void syscall_get_arguments(struct task_struct *task, |
| struct pt_regs *regs, |
| unsigned int i, unsigned int n, |
| unsigned long *args) |
| { |
| unsigned long *inside_ptregs = &(regs->r0); |
| inside_ptregs -= i; |
| |
| BUG_ON((i + n) > 6); |
| |
| while(n--) { |
| args[i++] = (*inside_ptregs); |
| inside_ptregs--; |
| } |
| } |
| |
| #endif |
