#ifndef LOADER_H
#define LOADER_H
#include <stdint.h>
#include <stdio.h>
typedef unsigned int 	Elf32_Addr;
typedef unsigned short 	Elf32_Half;
typedef unsigned int 	Elf32_Off;
typedef int 			Elf32_Sword;
typedef unsigned int 	Elf32_Word;

#define EI_NIDENT 16

typedef struct {
	unsigned char e_ident[EI_NIDENT];
	Elf32_Half e_type;
	Elf32_Half e_machine;
	Elf32_Word e_version;
	Elf32_Addr e_entry;
	Elf32_Off  e_phoff;
	Elf32_Off  e_shoff;
	Elf32_Word e_flags;
	Elf32_Half e_ehsize;
	Elf32_Half e_phentsize;
	Elf32_Half e_phnum;
	Elf32_Half e_shentsize;
	Elf32_Half e_shnum;
	Elf32_Half e_shstrndx;
} Elf32_Ehdr;

#define SHT_STRTAB 3

typedef struct {
	Elf32_Word sh_name;
	Elf32_Word sh_type;
	Elf32_Word sh_flags;
	Elf32_Addr sh_addr;
	Elf32_Off  sh_offset;
	Elf32_Word sh_size;
	Elf32_Word sh_link;
	Elf32_Word sh_info;
	Elf32_Word sh_addralign;
	Elf32_Word sh_entsize;
} Elf32_Shdr;

#define PT_LOAD 1
typedef struct {
	Elf32_Word p_type;
	Elf32_Off p_offset;
	Elf32_Addr p_vaddr;
	Elf32_Addr p_paddr;
	Elf32_Word p_filesz;
	Elf32_Word p_memsz;
	Elf32_Word p_flags;
	Elf32_Word p_align;
} Elf32_Phdr;

#define MAX_SEG_CNT 10
typedef struct {
	uint32_t offset; 	// base address
	uint32_t size;		// size
	char *content;
} segment_t;

extern segment_t segments[MAX_SEG_CNT];
extern uint32_t segment_cnt;

void ehdr_stats(Elf32_Ehdr *hdrp);
int load_shdrs(FILE *file, Elf32_Ehdr *ehdr, Elf32_Shdr *shdrs);
int load_strtab(FILE *file, Elf32_Shdr *shdr, char *buf);
int load_phdrs(FILE *file, Elf32_Ehdr *shdr, Elf32_Phdr *phdrs);
int load_psegs(FILE *file, Elf32_Ehdr *ehdr, Elf32_Phdr *phdrs);
#endif