#include "elf.h"

#include <magenta/config.h>
#include <stdio.h>
#include <stdlib.h>

#define LD_NAME              "ld64.so"
#define LD_IMAGE_BASE_OFFSET 1024

extern char _DYNAMIC[];
extern char _ld_image_base[];
extern char _ld_image_limit[];

struct elf_image *get_self(void)
{
	struct elf_image *self = malloc(sizeof *self);
	memset(self, 0x0, sizeof *self);

	snprintf(
		self->e_leaf.l_name,
		sizeof self->e_leaf.l_name,
		"%s",
		LD_NAME);
	kern_config_get(
		KERN_CFG_PAGE_SIZE,
		&self->e_page_size,
		sizeof self->e_page_size);

	self->e_base = (virt_addr_t)_ld_image_base - LD_IMAGE_BASE_OFFSET;
	self->e_length = (virt_addr_t)_ld_image_limit - self->e_base;
	if (self->e_length & (self->e_page_size - 1)) {
		self->e_length &= ~(self->e_page_size - 1);
		self->e_length += self->e_page_size;
	}

	self->e_dynamic.p_type = PT_DYNAMIC;
	self->e_dynamic.p_align = 8;
	self->e_dynamic.p_memsz = self->e_dynamic.p_filesz = (size_t)-1;
	self->e_dynamic.p_vaddr = (virt_addr_t)_DYNAMIC - self->e_base;

	elf_image_parse_dynamic(self);

	return self;
}