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 12 struct siginfo; 13 14 extern int uml_exitcode; 15 16 extern int ncpus; 17 extern int kmalloc_ok; 18 19 #define UML_ROUND_UP(addr) \ 20 ((((unsigned long) addr) + PAGE_SIZE - 1) & PAGE_MASK) 21 22 extern unsigned long alloc_stack(int order, int atomic); 23 extern void free_stack(unsigned long stack, int order); 24 25 extern int do_signal(void); 26 extern void interrupt_end(void); 27 extern void relay_signal(int sig, struct siginfo *si, struct uml_pt_regs *regs); 28 29 extern unsigned long segv(struct faultinfo fi, unsigned long ip, 30 int is_user, struct uml_pt_regs *regs); 31 extern int handle_page_fault(unsigned long address, unsigned long ip, 32 int is_write, int is_user, int *code_out); 33 34 extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs); 35 extern int smp_sigio_handler(void); 36 extern void initial_thread_cb(void (*proc)(void *), void *arg); 37 extern int is_syscall(unsigned long addr); 38 39 extern void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs); 40 41 extern int start_uml(void); 42 extern void paging_init(void); 43 44 extern void uml_cleanup(void); 45 extern void do_uml_exitcalls(void); 46 47 /* 48 * Are we disallowed to sleep? Used to choose between GFP_KERNEL and 49 * GFP_ATOMIC. 50 */ 51 extern int __cant_sleep(void); 52 extern int get_current_pid(void); 53 extern int copy_from_user_proc(void *to, void *from, int size); 54 extern int cpu(void); 55 extern char *uml_strdup(const char *string); 56 57 extern unsigned long to_irq_stack(unsigned long *mask_out); 58 extern unsigned long from_irq_stack(int nested); 59 60 extern void syscall_trace(struct uml_pt_regs *regs, int entryexit); 61 extern int singlestepping(void *t); 62 63 extern void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs); 64 extern void bus_handler(int sig, struct siginfo *si, struct uml_pt_regs *regs); 65 extern void winch(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs); 66 extern void fatal_sigsegv(void) __attribute__ ((noreturn)); 67 68 69 #endif 70