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#ifndef ELF_UTILS_H_
#define ELF_UTILS_H_
#include <elf.h>
#include <stdlib.h>
#include <sys/module.h>
/**
* elf_get_header - Returns a pointer to the ELF header structure.
* @elf_image: pointer to the ELF file image in memory
*/
static inline Elf_Ehdr *elf_get_header(void *elf_image) {
return (Elf_Ehdr*)elf_image;
}
/**
* elf_get_pht - Returns a pointer to the first entry in the PHT.
* @elf_image: pointer to the ELF file image in memory
*/
static inline Elf_Phdr *elf_get_pht(void *elf_image) {
Elf_Ehdr *elf_hdr = elf_get_header(elf_image);
return (Elf_Phdr*)((Elf_Off)elf_hdr + elf_hdr->e_phoff);
}
//
/**
* elf_get_ph - Returns the element with the given index in the PTH
* @elf_image: pointer to the ELF file image in memory
* @index: the index of the PHT entry to look for
*/
static inline Elf_Phdr *elf_get_ph(void *elf_image, int index) {
Elf_Phdr *elf_pht = elf_get_pht(elf_image);
Elf_Ehdr *elf_hdr = elf_get_header(elf_image);
return (Elf_Phdr*)((Elf_Off)elf_pht + index * elf_hdr->e_phentsize);
}
/**
* elf_hash - Returns the index in a SysV hash table for the symbol name.
* @name: the name of the symbol to look for
*/
extern unsigned long elf_hash(const unsigned char *name);
/**
* elf_gnu_hash - Returns the index in a GNU hash table for the symbol name.
* @name: the name of the symbol to look for
*/
extern unsigned long elf_gnu_hash(const unsigned char *name);
/**
* elf_malloc - Allocates memory to be used by ELF module contents.
* @memptr: pointer to a variable to hold the address of the allocated block.
* @alignment: alignment constraints of the block
* @size: the required size of the block
*/
extern int elf_malloc(void **memptr, size_t alignment, size_t size);
/**
* elf_free - Releases memory previously allocated by elf_malloc.
* @memptr: the address of the allocated block
*/
extern void elf_free(char *memptr);
#endif /*ELF_UTILS_H_*/
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