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
  21 extern int is_user_addr_valid(struct task_struct *child,
  22                               unsigned long start, unsigned long len);
  23
  24 /*
  25  * Get the address of the live pt_regs for the specified task.
  26  * These are saved onto the top kernel stack when the process
  27  * is not running.
  28  *
  29  * Note: if a user thread is execve'd from kernel space, the
  30  * kernel stack will not be empty on entry to the kernel, so
  31  * ptracing these tasks will fail.
  32  */
  33 #define task_pt_regs(task) \
  34         (struct pt_regs *) \
  35             ((unsigned long)task_stack_page(task) + \
  36              (THREAD_SIZE - sizeof(struct pt_regs)))
  37
  38 #include <asm-generic/ptrace.h>
  39
  40 #endif                          /* __ASSEMBLY__ */
  41 #endif                          /* _BFIN_PTRACE_H */