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/*
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include "linux/init.h"
#include "linux/sched.h"
#include "as-layout.h"
#include "kern.h"
#include "os.h"
#include "skas.h"
int new_mm(unsigned long stack)
{
int fd, err;
fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0);
if (fd < 0)
return fd;
if (skas_needs_stub) {
err = map_stub_pages(fd, STUB_CODE, STUB_DATA, stack);
if (err) {
os_close_file(fd);
return err;
}
}
return fd;
}
extern void start_kernel(void);
static int __init start_kernel_proc(void *unused)
{
int pid;
block_signals();
pid = os_getpid();
cpu_tasks[0].pid = pid;
cpu_tasks[0].task = current;
#ifdef CONFIG_SMP
init_cpu_online(get_cpu_mask(0));
#endif
start_kernel();
return 0;
}
extern int userspace_pid[];
extern char cpu0_irqstack[];
int __init start_uml(void)
{
stack_protections((unsigned long) &cpu0_irqstack);
set_sigstack(cpu0_irqstack, THREAD_SIZE);
if (proc_mm) {
userspace_pid[0] = start_userspace(0);
if (userspace_pid[0] < 0) {
printf("start_uml - start_userspace returned %d\n",
userspace_pid[0]);
exit(1);
}
}
init_new_thread_signals();
init_task.thread.request.u.thread.proc = start_kernel_proc;
init_task.thread.request.u.thread.arg = NULL;
return start_idle_thread(task_stack_page(&init_task),
&init_task.thread.switch_buf);
}
unsigned long current_stub_stack(void)
{
if (current->mm == NULL)
return 0;
return current->mm->context.id.stack;
}
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