1 #ifndef ELF_UTILS_H_ 2 #define ELF_UTILS_H_ 3 4 #include <elf.h> 5 #include <stdlib.h> 6 7 /** 8 * elf_get_header - Returns a pointer to the ELF header structure. 9 * @elf_image: pointer to the ELF file image in memory 10 */ elf_get_header(void * elf_image)11static inline Elf32_Ehdr *elf_get_header(void *elf_image) 12 { 13 return (Elf32_Ehdr *) elf_image; 14 } 15 16 /** 17 * elf_get_pht - Returns a pointer to the first entry in the PHT. 18 * @elf_image: pointer to the ELF file image in memory 19 */ elf_get_pht(void * elf_image)20static inline Elf32_Phdr *elf_get_pht(void *elf_image) 21 { 22 Elf32_Ehdr *elf_hdr = elf_get_header(elf_image); 23 24 return (Elf32_Phdr *) ((Elf32_Off) elf_hdr + elf_hdr->e_phoff); 25 } 26 27 // 28 /** 29 * elf_get_ph - Returns the element with the given index in the PTH 30 * @elf_image: pointer to the ELF file image in memory 31 * @index: the index of the PHT entry to look for 32 */ elf_get_ph(void * elf_image,int index)33static inline Elf32_Phdr *elf_get_ph(void *elf_image, int index) 34 { 35 Elf32_Phdr *elf_pht = elf_get_pht(elf_image); 36 Elf32_Ehdr *elf_hdr = elf_get_header(elf_image); 37 38 return (Elf32_Phdr *) ((Elf32_Off) elf_pht + index * elf_hdr->e_phentsize); 39 } 40 41 /** 42 * elf_hash - Returns the index in a SysV hash table for the symbol name. 43 * @name: the name of the symbol to look for 44 */ 45 extern unsigned long elf_hash(const unsigned char *name); 46 47 /** 48 * elf_gnu_hash - Returns the index in a GNU hash table for the symbol name. 49 * @name: the name of the symbol to look for 50 */ 51 extern unsigned long elf_gnu_hash(const unsigned char *name); 52 53 /** 54 * elf_malloc - Allocates memory to be used by ELF module contents. 55 * @memptr: pointer to a variable to hold the address of the allocated block. 56 * @alignment: alignment constraints of the block 57 * @size: the required size of the block 58 */ 59 extern int elf_malloc(void **memptr, size_t alignment, size_t size); 60 61 /** 62 * elf_free - Releases memory previously allocated by elf_malloc. 63 * @memptr: the address of the allocated block 64 */ 65 extern void elf_free(void *memptr); 66 67 #endif /*ELF_UTILS_H_ */ 68