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
  22 extern 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 */