#include <stdio.h>
#include <stdlib.h>

#include "elf.h"

int main(int argc, char** argv)
{
	FILE* fp;
	long file_size;

	fp = fopen("testfile", "rb");

	fseek(fp, 0, SEEK_END);
	file_size = ftell(fp);
	fseek(fp, 0, SEEK_SET);
	printf("size: %d!!\n", file_size);
	
	uint8_t* file = (uint8_t*)malloc(file_size);

	fread(file, 1, file_size, fp);

	Elf32_Ehdr *elf_ehdr = (Elf32_Ehdr*)file;

	int program_header_table_entry_count = elf_ehdr->e_phnum;
	int program_header_table_entry_size = elf_ehdr->e_phentsize;

	printf("magic: %s, type: %d, entry: 0x%X\n", elf_ehdr->e_ident, elf_ehdr->e_type, elf_ehdr->e_entry);
	printf("PHNUM: %d\n", program_header_table_entry_count);
	printf("PHENTSIZE: %d\n\n", program_header_table_entry_size);

	for(int i = 0; i < program_header_table_entry_count; i++)
	{
		Elf32_Phdr *elf_phdr = (Elf32_Phdr *)((uint32_t)file + elf_ehdr->e_phoff +
                                          i * elf_ehdr->e_phentsize);

		printf("HEADER %d, type: 0x%X, vaddr: 0x%X, paddr: 0x%X, memsz: 0x%X\n", i, elf_phdr->p_type, elf_phdr->p_vaddr, elf_phdr->p_paddr, elf_phdr->p_memsz);
		if(elf_phdr->p_type != PT_LOAD)
		{
			printf("not PT_LOAD, skipping...\n");
			continue;
		}
		int pages_needed = elf_phdr->p_memsz / 0x1000;
		printf("pages needed: %d\n", pages_needed);
		///////////////////////////
		//MAP HERE
		///////////////////////////
		
		//memcpy(elf_phdr->p_vaddr, file+elf_phdr->p_offset, elf_phdr->p_filesz);

		uint32_t file_start = elf_phdr->p_vaddr + elf_phdr->p_filesz;
		uint32_t file_end = elf_phdr->p_vaddr + pages_needed * 0x1000;
		//memset(file_start, 0, file_end - file_start);

		printf("p_filesz: 0x%X (%d)\n", elf_phdr->p_filesz, elf_phdr->p_filesz);
		
		

		printf("================================\n\n\n\n");
	}

	fclose(fp);
	free(file);
	return 0;
}