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/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* 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.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 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 OWNER 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.
*/
#ifndef _SYS_MMAN_H_
#define _SYS_MMAN_H_
#include <sys/types.h>
#include <sys/syscall.h>
#if defined(_KERNEL)
#include <sys/tree.h>
#include <vm/vm_obj.h>
#endif /* _KERNEL */
/*
* If we are in kernel space, all defines we want are
* in vm/pmap.h
*/
#if !defined(_KERNEL)
#define PROT_WRITE 0x00000001
#define PROT_EXEC 0x00000002
#define PROT_NONE 0x00000004
#define PROT_READ PROT_NONE
#endif /* !_KERNEL */
/* mmap() flags */
#define MAP_SHARED 0x0001
#define MAP_PRIVATE 0x0002
#define MAP_FIXED 0x0004
#define MAP_ANON 0x0008
#if defined(_KERNEL)
/*
* The mmap ledger entry
*
* @va_start: Starting virtual address.
* @obj: VM object representing this entry.
*/
struct mmap_entry {
vaddr_t va_start;
struct vm_object *obj;
size_t size;
RBT_ENTRY(mmap_entry) hd;
};
/*
* The mmap ledger is a per-process structure that
* describes memory mappings made using mmap()
*
* @hd: Red-black tree of mmap_entry structures
* @nbytes: Total bytes mapped.
*/
struct mmap_lgdr {
RBT_HEAD(lgdr_entries, mmap_entry) hd;
size_t nbytes;
};
/* Kernel munmap() routine */
int munmap_at(void *addr, size_t len);
/* Kernel mmap() routine */
void *mmap_at(void *addr, size_t len, int prot, int flags,
int fildes, off_t off);
int mmap_entrycmp(const struct mmap_entry *a, const struct mmap_entry *b);
RBT_PROTOTYPE(lgdr_entries, mmap_entry, hd, mmap_entrycmp)
#endif /* _KERNEL */
/* Syscall layer */
scret_t mmap(struct syscall_args *scargs);
scret_t munmap(struct syscall_args *scargs);
#endif /* !_SYS_MMAN_H_ */
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