| #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_*/ |