1/* 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 3 * Licensed under the GPL 4 */ 5 6#ifndef __KERN_UTIL_H__ 7#define __KERN_UTIL_H__ 8 9#include "sysdep/ptrace.h" 10#include "sysdep/faultinfo.h" 11 12extern int uml_exitcode; 13 14extern int ncpus; 15extern int kmalloc_ok; 16 17#define UML_ROUND_UP(addr) \ 18 ((((unsigned long) addr) + PAGE_SIZE - 1) & PAGE_MASK) 19 20extern unsigned long alloc_stack(int order, int atomic); 21extern void free_stack(unsigned long stack, int order); 22 23extern int do_signal(void); 24extern void copy_sc(struct uml_pt_regs *regs, void *from); 25extern void interrupt_end(void); 26extern void relay_signal(int sig, struct uml_pt_regs *regs); 27 28extern unsigned long segv(struct faultinfo fi, unsigned long ip, 29 int is_user, struct uml_pt_regs *regs); 30extern int handle_page_fault(unsigned long address, unsigned long ip, 31 int is_write, int is_user, int *code_out); 32 33extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs); 34extern int smp_sigio_handler(void); 35extern void initial_thread_cb(void (*proc)(void *), void *arg); 36extern int is_syscall(unsigned long addr); 37extern void timer_handler(int sig, struct uml_pt_regs *regs); 38 39extern void timer_handler(int sig, struct uml_pt_regs *regs); 40 41extern int start_uml(void); 42extern void paging_init(void); 43 44extern void uml_cleanup(void); 45extern void do_uml_exitcalls(void); 46 47/* 48 * Are we disallowed to sleep? Used to choose between GFP_KERNEL and 49 * GFP_ATOMIC. 50 */ 51extern int __cant_sleep(void); 52extern void *get_current(void); 53extern int copy_from_user_proc(void *to, void *from, int size); 54extern int cpu(void); 55extern char *uml_strdup(const char *string); 56 57extern unsigned long to_irq_stack(unsigned long *mask_out); 58extern unsigned long from_irq_stack(int nested); 59 60extern void syscall_trace(struct uml_pt_regs *regs, int entryexit); 61extern int singlestepping(void *t); 62 63extern void segv_handler(int sig, struct uml_pt_regs *regs); 64extern void bus_handler(int sig, struct uml_pt_regs *regs); 65extern void winch(int sig, struct uml_pt_regs *regs); 66extern void fatal_sigsegv(void) __attribute__ ((noreturn)); 67 68 69#endif 70