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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/um/include/shared/kern_util.h
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/* SPDX-License-Identifier: GPL-2.0 */

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/*

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 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)

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 */

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#ifndef __KERN_UTIL_H__

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#define __KERN_UTIL_H__

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#include <sysdep/ptrace.h>

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#include <sysdep/faultinfo.h>

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struct siginfo;

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extern int uml_exitcode;

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extern int kmalloc_ok;

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#define UML_ROUND_UP(addr) \

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	((((unsigned long) addr) + PAGE_SIZE - 1) & PAGE_MASK)

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extern unsigned long alloc_stack(int order, int atomic);

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extern void free_stack(unsigned long stack, int order);

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struct pt_regs;

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extern void do_signal(struct pt_regs *regs);

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extern void interrupt_end(void);

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extern void relay_signal(int sig, struct siginfo *si, struct uml_pt_regs *regs,

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			 void *mc);

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extern unsigned long segv(struct faultinfo fi, unsigned long ip,

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			  int is_user, struct uml_pt_regs *regs,

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			  void *mc);

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extern int handle_page_fault(unsigned long address, unsigned long ip,

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			     int is_write, int is_user, int *code_out);

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extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs);

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extern void initial_thread_cb(void (*proc)(void *), void *arg);

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extern void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);

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extern void uml_pm_wake(void);

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extern int start_uml(void);

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extern void paging_init(void);

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extern int parse_iomem(char *str, int *add);

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extern void uml_cleanup(void);

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extern void do_uml_exitcalls(void);

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/*

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 * Are we disallowed to sleep? Used to choose between GFP_KERNEL and

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 * GFP_ATOMIC.

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 */

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extern int __uml_cant_sleep(void);

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extern int get_current_pid(void);

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extern int copy_from_user_proc(void *to, void *from, int size);

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extern char *uml_strdup(const char *string);

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extern unsigned long to_irq_stack(unsigned long *mask_out);

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extern unsigned long from_irq_stack(int nested);

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extern int singlestepping(void);

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extern void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs,

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			 void *mc);

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extern void winch(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs,

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		  void *mc);

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extern void fatal_sigsegv(void) __attribute__ ((noreturn));

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void um_idle_sleep(void);

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void kasan_map_memory(void *start, size_t len);

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#endif

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