1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 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 struct pt_regs; 26 extern void do_signal(struct pt_regs *regs); 27 extern void interrupt_end(void); 28 extern void relay_signal(int sig, struct siginfo *si, struct uml_pt_regs *regs); 29 30 extern unsigned long segv(struct faultinfo fi, unsigned long ip, 31 int is_user, struct uml_pt_regs *regs); 32 extern int handle_page_fault(unsigned long address, unsigned long ip, 33 int is_write, int is_user, int *code_out); 34 35 extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs); 36 extern int smp_sigio_handler(void); 37 extern void initial_thread_cb(void (*proc)(void *), void *arg); 38 extern int is_syscall(unsigned long addr); 39 40 extern void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs); 41 42 extern int start_uml(void); 43 extern void paging_init(void); 44 45 extern void uml_cleanup(void); 46 extern void do_uml_exitcalls(void); 47 48 /* 49 * Are we disallowed to sleep? Used to choose between GFP_KERNEL and 50 * GFP_ATOMIC. 51 */ 52 extern int __cant_sleep(void); 53 extern int get_current_pid(void); 54 extern int copy_from_user_proc(void *to, void *from, int size); 55 extern int cpu(void); 56 extern char *uml_strdup(const char *string); 57 58 extern unsigned long to_irq_stack(unsigned long *mask_out); 59 extern unsigned long from_irq_stack(int nested); 60 61 extern void syscall_trace(struct uml_pt_regs *regs, int entryexit); 62 extern int singlestepping(void *t); 63 64 extern void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs); 65 extern void bus_handler(int sig, struct siginfo *si, struct uml_pt_regs *regs); 66 extern void winch(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs); 67 extern void fatal_sigsegv(void) __attribute__ ((noreturn)); 68 69 70 #endif 71