68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
#ifndef ELF_UTILS_H_
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#define ELF_UTILS_H_
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#include <elf.h>
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#include <stdlib.h>
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/**
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* elf_get_header - Returns a pointer to the ELF header structure.
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* @elf_image: pointer to the ELF file image in memory
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*/
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static inline Elf32_Ehdr *elf_get_header(void *elf_image)
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{
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return (Elf32_Ehdr *) elf_image;
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}
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/**
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* elf_get_pht - Returns a pointer to the first entry in the PHT.
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* @elf_image: pointer to the ELF file image in memory
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*/
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static inline Elf32_Phdr *elf_get_pht(void *elf_image)
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{
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Elf32_Ehdr *elf_hdr = elf_get_header(elf_image);
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return (Elf32_Phdr *) ((Elf32_Off) elf_hdr + elf_hdr->e_phoff);
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}
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//
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/**
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* elf_get_ph - Returns the element with the given index in the PTH
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* @elf_image: pointer to the ELF file image in memory
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* @index: the index of the PHT entry to look for
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*/
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static inline Elf32_Phdr *elf_get_ph(void *elf_image, int index)
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{
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Elf32_Phdr *elf_pht = elf_get_pht(elf_image);
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Elf32_Ehdr *elf_hdr = elf_get_header(elf_image);
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return (Elf32_Phdr *) ((Elf32_Off) elf_pht + index * elf_hdr->e_phentsize);
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}
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/**
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* elf_hash - Returns the index in a SysV hash table for the symbol name.
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* @name: the name of the symbol to look for
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*/
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extern unsigned long elf_hash(const unsigned char *name);
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/**
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* elf_gnu_hash - Returns the index in a GNU hash table for the symbol name.
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* @name: the name of the symbol to look for
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*/
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extern unsigned long elf_gnu_hash(const unsigned char *name);
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/**
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* elf_malloc - Allocates memory to be used by ELF module contents.
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* @memptr: pointer to a variable to hold the address of the allocated block.
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* @alignment: alignment constraints of the block
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* @size: the required size of the block
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*/
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extern int elf_malloc(void **memptr, size_t alignment, size_t size);
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/**
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* elf_free - Releases memory previously allocated by elf_malloc.
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* @memptr: the address of the allocated block
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*/
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extern void elf_free(void *memptr);
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#endif /*ELF_UTILS_H_ */
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