include/shared/kern_util.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
0004  */
0005
0006 #ifndef __KERN_UTIL_H__
0007 #define __KERN_UTIL_H__
0008
0009 #include <sysdep/ptrace.h>
0010 #include <sysdep/faultinfo.h>
0011
0012 struct siginfo;
0013
0014 extern int uml_exitcode;
0015
0016 extern int ncpus;
0017 extern int kmalloc_ok;
0018
0019 #define UML_ROUND_UP(addr) \
0020     ((((unsigned long) addr) + PAGE_SIZE - 1) & PAGE_MASK)
0021
0022 extern unsigned long alloc_stack(int order, int atomic);
0023 extern void free_stack(unsigned long stack, int order);
0024
0025 struct pt_regs;
0026 extern void do_signal(struct pt_regs *regs);
0027 extern void interrupt_end(void);
0028 extern void relay_signal(int sig, struct siginfo *si, struct uml_pt_regs *regs);
0029
0030 extern unsigned long segv(struct faultinfo fi, unsigned long ip,
0031               int is_user, struct uml_pt_regs *regs);
0032 extern int handle_page_fault(unsigned long address, unsigned long ip,
0033                  int is_write, int is_user, int *code_out);
0034
0035 extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs);
0036 extern void initial_thread_cb(void (*proc)(void *), void *arg);
0037 extern int is_syscall(unsigned long addr);
0038
0039 extern void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
0040
0041 extern void uml_pm_wake(void);
0042
0043 extern int start_uml(void);
0044 extern void paging_init(void);
0045
0046 extern void uml_cleanup(void);
0047 extern void do_uml_exitcalls(void);
0048
0049 /*
0050  * Are we disallowed to sleep? Used to choose between GFP_KERNEL and
0051  * GFP_ATOMIC.
0052  */
0053 extern int __cant_sleep(void);
0054 extern int get_current_pid(void);
0055 extern int copy_from_user_proc(void *to, void *from, int size);
0056 extern char *uml_strdup(const char *string);
0057
0058 extern unsigned long to_irq_stack(unsigned long *mask_out);
0059 extern unsigned long from_irq_stack(int nested);
0060
0061 extern int singlestepping(void *t);
0062
0063 extern void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
0064 extern void bus_handler(int sig, struct siginfo *si, struct uml_pt_regs *regs);
0065 extern void winch(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
0066 extern void fatal_sigsegv(void) __attribute__ ((noreturn));
0067
0068 void um_idle_sleep(void);
0069
0070 #endif