fixup.h File Reference

#include <stdint.h>
#include <stddef.h>

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Classes
struct	_fixup_entry

Functions
uint64_t	__search_fixup_table (uint64_t fault_pc)
	__search_fixup_table – searches alternative address to jump when kernel hits data abort exception
long	__bordoisila_copy_from_user (void *dst, const void *usrc, size_t n)
	__bordoisila_copy_from_user – copy data from user to kernel memory
long	__bordoisila_copy_to_user (void *udst, const void *src, size_t n)
	__bordoisila_copy_to_user – copy to user memory from kernel memory
void	__bordoisila_fixup_table_check ()
	__bordoisila_fixup_table_check – could be called during kernel initialization to check fixup addresses

Detailed Description

BSD 2-Clause License

Copyright (c) 2022-2025, Manas Kamal Choudhury All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Function Documentation

__bordoisila_copy_from_user()

long __bordoisila_copy_from_user ( void *  dst, const void *  usrc, size_t  n  )

extern

__bordoisila_copy_from_user – copy data from user to kernel memory

Parameters

dst	– destination kernel memory
usrc	– user source memory
n	– number of bytes to copy

__bordoisila_copy_to_user()

long __bordoisila_copy_to_user ( void *  udst, const void *  src, size_t  n  )

extern

__bordoisila_copy_to_user – copy to user memory from kernel memory

Parameters

udst	– user space destination memory
src	– kernel source memory
n	– number of bytes to copy

__bordoisila_fixup_table_check()

void __bordoisila_fixup_table_check ( )

extern

__bordoisila_fixup_table_check – could be called during kernel initialization to check fixup addresses

__search_fixup_table()

uint64_t __search_fixup_table ( uint64_t  fault_pc )

extern

__search_fixup_table – searches alternative address to jump when kernel hits data abort exception

Parameters

fault_pc

– faulting instruction pointer