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 */
11
12#include <linux/kernel.h>
13#include <linux/sched.h>
14#include <linux/mm.h>
15#include <linux/smp.h>
16#include <linux/errno.h>
17#include <linux/ptrace.h>
18#include <linux/user.h>
19#include <linux/tracehook.h>
20
21#include <asm/uaccess.h>
22#include <asm/page.h>
23#include <asm/pgtable.h>
24#include <asm/processor.h>
25
26
27/* notification of userspace execution resumption
28 * - triggered by current->work.notify_resume
29 */
30extern int do_signal(int canrestart, struct pt_regs *regs);
31
32
33void do_notify_resume(int canrestart, struct pt_regs *regs,
34		      __u32 thread_info_flags)
35{
36	/* deal with pending signal delivery */
37	if (thread_info_flags & _TIF_SIGPENDING)
38		do_signal(canrestart,regs);
39
40	if (thread_info_flags & _TIF_NOTIFY_RESUME) {
41		clear_thread_flag(TIF_NOTIFY_RESUME);
42		tracehook_notify_resume(regs);
43	}
44}
45
46void do_work_pending(int syscall, struct pt_regs *regs,
47		     unsigned int thread_flags)
48{
49	do {
50		if (likely(thread_flags & _TIF_NEED_RESCHED)) {
51			schedule();
52		} else {
53			if (unlikely(!user_mode(regs)))
54				return;
55			local_irq_enable();
56			if (thread_flags & _TIF_SIGPENDING) {
57				do_signal(syscall, regs);
58				syscall = 0;
59			} else {
60				clear_thread_flag(TIF_NOTIFY_RESUME);
61				tracehook_notify_resume(regs);
62			}
63		}
64		local_irq_disable();
65		thread_flags = current_thread_info()->flags;
66	} while (thread_flags & _TIF_WORK_MASK);
67}
68