mman.h File Reference

Go to the source code of this file.

Macros
#define	PROT_NONE   0x00
#define	PROT_READ   0x01
#define	PROT_WRITE   0x02
#define	PROT_EXEC   0x04
#define	MAP_FILE   0x0010
#define	MAP_ANON   0x0020
#define	MAP_FIXED   0x0040

Functions
int	getpagesizes (size_t *pagesize, int nlem)
void *	mmap (void *addr, size_t len, int prot, int flags, int fd, off_t offset)
int	munmap (void *addr, size_t len)
int	mprotect (void *addr, size_t len, int prot)
int	madvise (void *addr, size_t len, int behav)

Macro Definition Documentation

MAP_ANON

#define MAP_ANON   0x0020

Definition at line 11 of file mman.h.

MAP_FILE

#define MAP_FILE   0x0010

Definition at line 10 of file mman.h.

MAP_FIXED

#define MAP_FIXED   0x0040

Definition at line 12 of file mman.h.

PROT_EXEC

#define PROT_EXEC   0x04

Definition at line 8 of file mman.h.

PROT_NONE

#define PROT_NONE   0x00

Definition at line 5 of file mman.h.

PROT_READ

#define PROT_READ   0x01

Definition at line 6 of file mman.h.

PROT_WRITE

#define PROT_WRITE   0x02

Definition at line 7 of file mman.h.

Function Documentation

getpagesizes()

int getpagesizes	(	size_t *	pagesize,
		int	nlem
	)

Definition at line 16 of file mman.c.

{
#if defined(__x86_64__)
    if (pagesize) {
        if (nelem >= 1)
            pagesize[0] = PGSIZE;
        if (nelem >= 2)
            pagesize[1] = LARGE_PGSIZE;
        if (nelem >= 3)
            pagesize[2] = HUGE_PGSIZE;
        return (nelem > 3 ? 3 : nelem);
    }
    return 3;
#else
#error "Unsupported Architecture!"
#endif
}

madvise()

int madvise	(	void *	addr,
		size_t	len,
		int	behav
	)

Definition at line 71 of file mman.c.

{
    return 0;
}

mmap()

void * mmap	(	void *	addr,
		size_t	len,
		int	prot,
		int	flags,
		int	fd,
		off_t	offset
	)

Definition at line 35 of file mman.c.

{
    void *realAddr;
 
    if (!(flags & MAP_FIXED)) {
        // Find an address
    }
 
    if (flags & MAP_ANON) {
        realAddr = OSMemMap(addr, len, prot | flags);
    } else {
        abort();
    }
 
    // XXX: Update mapping
 
    return realAddr;
}

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mprotect()

int mprotect	(	void *	addr,
		size_t	len,
		int	prot
	)

Definition at line 63 of file mman.c.

{
    // XXX: Update mappings
 
    return OSMemProtect(addr, len, prot);
}

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munmap()

int munmap	(	void *	addr,
		size_t	len
	)

Definition at line 55 of file mman.c.

{
    // XXX: Update mappings
 
    return OSMemUnmap(addr, len);
}

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