LXR linux/arch/blackfin/include/asm/ptrace.h

   1/*
   2 * Copyright 2004-2008 Analog Devices Inc.
   3 *
   4 * Licensed under the GPL-2 or later.
   5 */
   6#ifndef _BFIN_PTRACE_H
   7#define _BFIN_PTRACE_H
   8
   9#include <uapi/asm/ptrace.h>
  10
  11#ifndef __ASSEMBLY__
  12
  13/* user_mode returns true if only one bit is set in IPEND, other than the
  14   master interrupt enable.  */
  15#define user_mode(regs) (!(((regs)->ipend & ~0x10) & (((regs)->ipend & ~0x10) - 1)))
  16
  17#define arch_has_single_step()  (1)
  18/* common code demands this function */
  19#define ptrace_disable(child) user_disable_single_step(child)
  20#define current_user_stack_pointer() rdusp()
  21
  22extern int is_user_addr_valid(struct task_struct *child,
  23                              unsigned long start, unsigned long len);
  24
  25/*
  26 * Get the address of the live pt_regs for the specified task.
  27 * These are saved onto the top kernel stack when the process
  28 * is not running.
  29 *
  30 * Note: if a user thread is execve'd from kernel space, the
  31 * kernel stack will not be empty on entry to the kernel, so
  32 * ptracing these tasks will fail.
  33 */
  34#define task_pt_regs(task) \
  35        (struct pt_regs *) \
  36            ((unsigned long)task_stack_page(task) + \
  37             (THREAD_SIZE - sizeof(struct pt_regs)))
  38
  39#include <asm-generic/ptrace.h>
  40
  41#endif                          /* __ASSEMBLY__ */
  42#endif                          /* _BFIN_PTRACE_H */
  43