kern_util.h

 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
12struct siginfo;
13
14extern int uml_exitcode;
15
16extern int kmalloc_ok;
17
18extern unsigned long alloc_stack(int order, int atomic);
19extern void free_stack(unsigned long stack, int order);
20
21struct pt_regs;
22extern void do_signal(struct pt_regs *regs);
23extern void interrupt_end(void);
24extern void relay_signal(int sig, struct siginfo *si, struct uml_pt_regs *regs,
25			 void *mc);
26
27extern unsigned long segv(struct faultinfo fi, unsigned long ip,
28			  int is_user, struct uml_pt_regs *regs,
29			  void *mc);
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 void initial_thread_cb(void (*proc)(void *), void *arg);
35
36extern void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
37
38extern void uml_pm_wake(void);
39
40extern int start_uml(void);
41extern void paging_init(void);
42
43extern void uml_cleanup(void);
44extern void do_uml_exitcalls(void);
45
46/*
47 * Are we disallowed to sleep? Used to choose between GFP_KERNEL and
48 * GFP_ATOMIC.
49 */
50extern int __uml_cant_sleep(void);
51extern int get_current_pid(void);
52extern int copy_from_user_proc(void *to, void *from, int size);
53extern char *uml_strdup(const char *string);
54int uml_need_resched(void);
55
56extern unsigned long to_irq_stack(unsigned long *mask_out);
57extern unsigned long from_irq_stack(int nested);
58
59extern int singlestepping(void);
60
61extern void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs,
62			 void *mc);
63extern void winch(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs,
64		  void *mc);
65extern void fatal_sigsegv(void) __attribute__ ((noreturn));
66
67void um_idle_sleep(void);
68
69void kasan_map_memory(void *start, size_t len);
70
71#endif