arch/cris/kernel/ptrace.c

   1 /*
   2  *  linux/arch/cris/kernel/ptrace.c
   3  *
   4  * Parts taken from the m68k port.
   5  *
   6  * Copyright (c) 2000, 2001, 2002 Axis Communications AB
   7  *
   8  * Authors:   Bjorn Wesen
   9  *
  10  * $Log: ptrace.c,v $
  11  * Revision 1.10  2004/09/22 11:50:01  orjanf
  12  * * Moved get_reg/put_reg to arch-specific files.
  13  * * Added functions to access debug registers (CRISv32).
  14  * * Added support for PTRACE_SINGLESTEP (CRISv32).
  15  * * Added S flag to CCS_MASK (CRISv32).
  16  *
  17  * Revision 1.9  2003/07/04 12:56:11  tobiasa
  18  * Moved arch-specific code to arch-specific files.
  19  *
  20  * Revision 1.8  2003/04/09 05:20:47  starvik
  21  * Merge of Linux 2.5.67
  22  *
  23  * Revision 1.7  2002/11/27 08:42:34  starvik
  24  * Argument to user_regs() is thread_info*
  25  *
  26  * Revision 1.6  2002/11/20 11:56:11  starvik
  27  * Merge of Linux 2.5.48
  28  *
  29  * Revision 1.5  2002/11/18 07:41:19  starvik
  30  * Removed warning
  31  *
  32  * Revision 1.4  2002/11/11 12:47:28  starvik
  33  * SYSCALL_TRACE has been moved to thread flags
  34  *
  35  * Revision 1.3  2002/02/05 15:37:18  bjornw
  36  * * Add do_notify_resume (replaces do_signal in the callchain)
  37  * * syscall_trace is now do_syscall_trace
  38  * * current->ptrace flag PT_TRACESYS -> PT_SYSCALLTRACE
  39  * * Keep track of the current->work.syscall_trace counter
  40  *
  41  * Revision 1.2  2001/12/18 13:35:20  bjornw
  42  * Applied the 2.4.13->2.4.16 CRIS patch to 2.5.1 (is a copy of 2.4.15).
  43  *
  44  * Revision 1.8  2001/11/12 18:26:21  pkj
  45  * Fixed compiler warnings.
  46  *
  47  * Revision 1.7  2001/09/26 11:53:49  bjornw
  48  * PTRACE_DETACH works more simple in 2.4.10
  49  *
  50  * Revision 1.6  2001/07/25 16:08:47  bjornw
  51  * PTRACE_ATTACH bulk moved into arch-independent code in 2.4.7
  52  *
  53  * Revision 1.5  2001/03/26 14:24:28  orjanf
  54  * * Changed loop condition.
  55  * * Added comment documenting non-standard ptrace behaviour.
  56  *
  57  * Revision 1.4  2001/03/20 19:44:41  bjornw
  58  * Use the user_regs macro instead of thread.esp0
  59  *
  60  * Revision 1.3  2000/12/18 23:45:25  bjornw
  61  * Linux/CRIS first version
  62  *
  63  *
  64  */
  65
  66 #include <linux/kernel.h>
  67 #include <linux/sched.h>
  68 #include <linux/mm.h>
  69 #include <linux/smp.h>
  70 #include <linux/smp_lock.h>
  71 #include <linux/errno.h>
  72 #include <linux/ptrace.h>
  73 #include <linux/user.h>
  74
  75 #include <asm/uaccess.h>
  76 #include <asm/page.h>
  77 #include <asm/pgtable.h>
  78 #include <asm/system.h>
  79 #include <asm/processor.h>
  80
  81
  82 /* notification of userspace execution resumption
  83  * - triggered by current->work.notify_resume
  84  */
  85 extern int do_signal(int canrestart, sigset_t *oldset, struct pt_regs *regs);
  86
  87
  88 void do_notify_resume(int canrestart, sigset_t *oldset, struct pt_regs *regs,
  89                       __u32 thread_info_flags  )
  90 {
  91         /* deal with pending signal delivery */
  92         if (thread_info_flags & _TIF_SIGPENDING)
  93                 do_signal(canrestart,oldset,regs);
  94 }