LXR linux/arch/um/kernel/skas/process.c

   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}
  53