1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 
 4 */
 5
 6#include <linux/init.h>
 7#include <linux/sched/mm.h>
 8#include <linux/sched/task_stack.h>
 9#include <linux/sched/task.h>
10
11#include <as-layout.h>
12#include <kern.h>
13#include <os.h>
14#include <skas.h>
15
16extern void start_kernel(void);
17
18static int __init start_kernel_proc(void *unused)
19{
20	int pid;
21
22	block_signals_trace();
23	pid = os_getpid();
24
25	cpu_tasks[0].pid = pid;
26	cpu_tasks[0].task = current;
27
28	start_kernel();
29	return 0;
30}
31
32extern int userspace_pid[];
33
34extern char cpu0_irqstack[];
35
36int __init start_uml(void)
37{
38	stack_protections((unsigned long) &cpu0_irqstack);
39	set_sigstack(cpu0_irqstack, THREAD_SIZE);
40
41	init_new_thread_signals();
42
43	init_task.thread.request.u.thread.proc = start_kernel_proc;
44	init_task.thread.request.u.thread.arg = NULL;
45	return start_idle_thread(task_stack_page(&init_task),
46				 &init_task.thread.switch_buf);
47}
48
49unsigned long current_stub_stack(void)
50{
51	if (current->mm == NULL)
52		return 0;
53
54	return current->mm->context.id.stack;
55}

 
 1/*
 2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 3 * Licensed under the GPL
 4 */
 5
 6#include <linux/init.h>
 7#include <linux/sched.h>
 
 
 
 8#include <as-layout.h>
 9#include <kern.h>
10#include <os.h>
11#include <skas.h>
12
13extern void start_kernel(void);
14
15static int __init start_kernel_proc(void *unused)
16{
17	int pid;
18
19	block_signals();
20	pid = os_getpid();
21
22	cpu_tasks[0].pid = pid;
23	cpu_tasks[0].task = current;
24
25	start_kernel();
26	return 0;
27}
28
29extern int userspace_pid[];
30
31extern char cpu0_irqstack[];
32
33int __init start_uml(void)
34{
35	stack_protections((unsigned long) &cpu0_irqstack);
36	set_sigstack(cpu0_irqstack, THREAD_SIZE);
37
38	init_new_thread_signals();
39
40	init_task.thread.request.u.thread.proc = start_kernel_proc;
41	init_task.thread.request.u.thread.arg = NULL;
42	return start_idle_thread(task_stack_page(&init_task),
43				 &init_task.thread.switch_buf);
44}
45
46unsigned long current_stub_stack(void)
47{
48	if (current->mm == NULL)
49		return 0;
50
51	return current->mm->context.id.stack;
52}