1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun #ifndef __KERN_UTIL_H__ 7*4882a593Smuzhiyun #define __KERN_UTIL_H__ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #include <sysdep/ptrace.h> 10*4882a593Smuzhiyun #include <sysdep/faultinfo.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun struct siginfo; 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun extern int uml_exitcode; 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun extern int ncpus; 17*4882a593Smuzhiyun extern int kmalloc_ok; 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun #define UML_ROUND_UP(addr) \ 20*4882a593Smuzhiyun ((((unsigned long) addr) + PAGE_SIZE - 1) & PAGE_MASK) 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun extern unsigned long alloc_stack(int order, int atomic); 23*4882a593Smuzhiyun extern void free_stack(unsigned long stack, int order); 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun struct pt_regs; 26*4882a593Smuzhiyun extern void do_signal(struct pt_regs *regs); 27*4882a593Smuzhiyun extern void interrupt_end(void); 28*4882a593Smuzhiyun extern void relay_signal(int sig, struct siginfo *si, struct uml_pt_regs *regs); 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun extern unsigned long segv(struct faultinfo fi, unsigned long ip, 31*4882a593Smuzhiyun int is_user, struct uml_pt_regs *regs); 32*4882a593Smuzhiyun extern int handle_page_fault(unsigned long address, unsigned long ip, 33*4882a593Smuzhiyun int is_write, int is_user, int *code_out); 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs); 36*4882a593Smuzhiyun extern int smp_sigio_handler(void); 37*4882a593Smuzhiyun extern void initial_thread_cb(void (*proc)(void *), void *arg); 38*4882a593Smuzhiyun extern int is_syscall(unsigned long addr); 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun extern void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs); 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun extern void uml_pm_wake(void); 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun extern int start_uml(void); 45*4882a593Smuzhiyun extern void paging_init(void); 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun extern void uml_cleanup(void); 48*4882a593Smuzhiyun extern void do_uml_exitcalls(void); 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun /* 51*4882a593Smuzhiyun * Are we disallowed to sleep? Used to choose between GFP_KERNEL and 52*4882a593Smuzhiyun * GFP_ATOMIC. 53*4882a593Smuzhiyun */ 54*4882a593Smuzhiyun extern int __cant_sleep(void); 55*4882a593Smuzhiyun extern int get_current_pid(void); 56*4882a593Smuzhiyun extern int copy_from_user_proc(void *to, void *from, int size); 57*4882a593Smuzhiyun extern int cpu(void); 58*4882a593Smuzhiyun extern char *uml_strdup(const char *string); 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun extern unsigned long to_irq_stack(unsigned long *mask_out); 61*4882a593Smuzhiyun extern unsigned long from_irq_stack(int nested); 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun extern void syscall_trace(struct uml_pt_regs *regs, int entryexit); 64*4882a593Smuzhiyun extern int singlestepping(void *t); 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun extern void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs); 67*4882a593Smuzhiyun extern void bus_handler(int sig, struct siginfo *si, struct uml_pt_regs *regs); 68*4882a593Smuzhiyun extern void winch(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs); 69*4882a593Smuzhiyun extern void fatal_sigsegv(void) __attribute__ ((noreturn)); 70*4882a593Smuzhiyun 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun #endif 73