root/arch/um/include/shared/kern_util.h

INCLUDED FROM

   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