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/*
* linux/arch/cris/kernel/ptrace.c
*
* Parts taken from the m68k port.
*
* Copyright (c) 2000, 2001, 2002 Axis Communications AB
*
* Authors: Bjorn Wesen
*
* $Log: ptrace.c,v $
* Revision 1.9 2003/07/04 12:56:11 tobiasa
* Moved arch-specific code to arch-specific files.
*
* Revision 1.8 2003/04/09 05:20:47 starvik
* Merge of Linux 2.5.67
*
* Revision 1.7 2002/11/27 08:42:34 starvik
* Argument to user_regs() is thread_info*
*
* Revision 1.6 2002/11/20 11:56:11 starvik
* Merge of Linux 2.5.48
*
* Revision 1.5 2002/11/18 07:41:19 starvik
* Removed warning
*
* Revision 1.4 2002/11/11 12:47:28 starvik
* SYSCALL_TRACE has been moved to thread flags
*
* Revision 1.3 2002/02/05 15:37:18 bjornw
* * Add do_notify_resume (replaces do_signal in the callchain)
* * syscall_trace is now do_syscall_trace
* * current->ptrace flag PT_TRACESYS -> PT_SYSCALLTRACE
* * Keep track of the current->work.syscall_trace counter
*
* Revision 1.2 2001/12/18 13:35:20 bjornw
* Applied the 2.4.13->2.4.16 CRIS patch to 2.5.1 (is a copy of 2.4.15).
*
* Revision 1.8 2001/11/12 18:26:21 pkj
* Fixed compiler warnings.
*
* Revision 1.7 2001/09/26 11:53:49 bjornw
* PTRACE_DETACH works more simple in 2.4.10
*
* Revision 1.6 2001/07/25 16:08:47 bjornw
* PTRACE_ATTACH bulk moved into arch-independent code in 2.4.7
*
* Revision 1.5 2001/03/26 14:24:28 orjanf
* * Changed loop condition.
* * Added comment documenting non-standard ptrace behaviour.
*
* Revision 1.4 2001/03/20 19:44:41 bjornw
* Use the user_regs macro instead of thread.esp0
*
* Revision 1.3 2000/12/18 23:45:25 bjornw
* Linux/CRIS first version
*
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/processor.h>
/*
* Get contents of register REGNO in task TASK.
*/
inline long get_reg(struct task_struct *task, unsigned int regno)
{
/* USP is a special case, it's not in the pt_regs struct but
* in the tasks thread struct
*/
if (regno == PT_USP)
return task->thread.usp;
else if (regno < PT_MAX)
return ((unsigned long *)user_regs(task->thread_info))[regno];
else
return 0;
}
/*
* Write contents of register REGNO in task TASK.
*/
inline int put_reg(struct task_struct *task, unsigned int regno,
unsigned long data)
{
if (regno == PT_USP)
task->thread.usp = data;
else if (regno < PT_MAX)
((unsigned long *)user_regs(task->thread_info))[regno] = data;
else
return -1;
return 0;
}
/* notification of userspace execution resumption
* - triggered by current->work.notify_resume
*/
extern int do_signal(int canrestart, sigset_t *oldset, struct pt_regs *regs);
void do_notify_resume(int canrestart, sigset_t *oldset, struct pt_regs *regs,
__u32 thread_info_flags )
{
/* deal with pending signal delivery */
if (thread_info_flags & _TIF_SIGPENDING)
do_signal(canrestart,oldset,regs);
}
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