memory.h File Reference

Custom memory manipulation functions. More...

#include <basics.h>
#include <limine.h>

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Classes
struct	memory_context

Functions
void *	memcpy (void *dest, const void *src, size_t n)
	Copies a block of memory from a source location to a destination location.
void *	memset (void *s, int c, size_t n)
	Sets a block of memory to a specified value.
void *	memmove (void *dest, const void *src, size_t n)
	Copies a block of memory from a source location to a destination location, possibly overlapping.
int	memcmp (const void *s1, const void *s2, size_t n)
	Compares two blocks of memory.
void	memory_dump (const void *start, const void *end)
	Dump memory content from start to end.
void *	allocate_memory_at_address (int64 phys_addr, size_t size)
	Allocates memory at an specific address.
void	display_memory_formatted (struct memory_context *memory)
	Display the formatted memory context.
void	analyze_memory_map (struct memory_context *memory, volatile struct limine_memmap_request memory_map_request)
	Reads the Limine memory map and saves to an usable context.
uint64_t	getCR2 ()
	Returns the CR2 register.

Detailed Description

Custom memory manipulation functions.

This header file defines custom memory manipulation functions that are equivalent to the standard C library functions memcpy, memset, memmove, and memcmp.

Definition in file memory.h.

Function Documentation

allocate_memory_at_address()

void * allocate_memory_at_address	(	int64	phys_addr,
		size_t	size )

Allocates memory at an specific address.

Parameters

phys_addr	Physical address to allocate memory.
size	Size of the memory to allocate.

Returns

Pointer to the allocated memory, or NULL if allocation fails.

analyze_memory_map()

void analyze_memory_map	(	struct memory_context *	memory,
		volatile struct limine_memmap_request	memory_map_request )

Reads the Limine memory map and saves to an usable context.

Parameters

memory	The memory context.
memory_map_request	Limine Memory Mam Request.

display_memory_formatted()

void display_memory_formatted

(

struct memory_context *

memory

)

Display the formatted memory context.

Parameters

memory

The memory context to display.

getCR2()

uint64_t getCR2

(

)

Returns the CR2 register.

Returns

uint64_t value of CR2.

memcmp()

int memcmp	(	const void *	s1,
		const void *	s2,
		size_t	n )

Compares two blocks of memory.

This function compares the first 'n' bytes of memory in 's1' and 's2'.

Parameters

s1	Pointer to the first memory location.
s2	Pointer to the second memory location.
n	Number of bytes to compare.

Returns

0 if the memory blocks are equal, a negative value if 's1' is less than 's2, and a positive value if 's1' is greater than 's2'.

memcpy()

void * memcpy	(	void *	dest,
		const void *	src,
		size_t	n )

Copies a block of memory from a source location to a destination location.

This function copies 'n' bytes of memory from 'src' to 'dest'. The source and destination memory areas should not overlap.

Parameters

dest	Pointer to the destination memory location.
src	Pointer to the source memory location.
n	Number of bytes to copy.

Returns

A pointer to the destination memory location 'dest'.

memmove()

void * memmove	(	void *	dest,
		const void *	src,
		size_t	n )

Copies a block of memory from a source location to a destination location, possibly overlapping.

This function copies 'n' bytes of memory from 'src' to 'dest'. The source and destination memory areas may overlap. In such cases, it ensures the correct copy by choosing the appropriate copy direction.

Parameters

dest	Pointer to the destination memory location.
src	Pointer to the source memory location.
n	Number of bytes to copy.

Returns

A pointer to the destination memory location 'dest'.

memory_dump()

void memory_dump	(	const void *	start,
		const void *	end )

Dump memory content from start to end.

This function iterates through the memory addresses from start to end and prints the address and corresponding value in hexadecimal format.

Parameters

start	Pointer to the start address of the memory to be dumped.
end	Pointer to the end address of the memory to be dumped.

memset()

void * memset	(	void *	s,
		int	c,
		size_t	n )

Sets a block of memory to a specified value.

This function sets the first 'n' bytes of the memory block at 's' to the value 'c'.

Parameters

s	Pointer to the memory location.
c	Value to set (as an integer).
n	Number of bytes to set.

Returns

A pointer to the memory location 's'.