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