text: /*
   * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   * Licensed under the GPL
   */
  
  #ifndef __KERN_UTIL_H__
  #define __KERN_UTIL_H__
  
  #include <sysdep/ptrace.h>
  #include <sysdep/faultinfo.h>
  
  struct siginfo;
  
  extern int uml_exitcode;
  
  extern int ncpus;
  extern int kmalloc_ok;
  
  #define UML_ROUND_UP(addr) \
  	((((unsigned long) addr) + PAGE_SIZE - 1) & PAGE_MASK)
  
  extern unsigned long alloc_stack(int order, int atomic);
  extern void free_stack(unsigned long stack, int order);
  
  struct pt_regs;
  extern void do_signal(struct pt_regs *regs);
  extern void interrupt_end(void);
  extern void relay_signal(int sig, struct siginfo *si, struct uml_pt_regs *regs);
  
  extern unsigned long segv(struct faultinfo fi, unsigned long ip,
  			  int is_user, struct uml_pt_regs *regs);
  extern int handle_page_fault(unsigned long address, unsigned long ip,
  			     int is_write, int is_user, int *code_out);
  
  extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs);
  extern int smp_sigio_handler(void);
  extern void initial_thread_cb(void (*proc)(void *), void *arg);
  extern int is_syscall(unsigned long addr);
  
  extern void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
  
  extern int start_uml(void);
  extern void paging_init(void);
  
  extern void uml_cleanup(void);
  extern void do_uml_exitcalls(void);
  
  /*
   * Are we disallowed to sleep? Used to choose between GFP_KERNEL and
   * GFP_ATOMIC.
   */
  extern int __cant_sleep(void);
  extern int get_current_pid(void);
  extern int copy_from_user_proc(void *to, void *from, int size);
  extern int cpu(void);
  extern char *uml_strdup(const char *string);
  
  extern unsigned long to_irq_stack(unsigned long *mask_out);
  extern unsigned long from_irq_stack(int nested);
  
  extern void syscall_trace(struct uml_pt_regs *regs, int entryexit);
  extern int singlestepping(void *t);
  
  extern void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
  extern void bus_handler(int sig, struct siginfo *si, struct uml_pt_regs *regs);
  extern void winch(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
  extern void fatal_sigsegv(void) __attribute__ ((noreturn));
  
  
  #endif
  