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/* elfparse.h
* Copyright 2014 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Elf parsing.
*/
#ifndef _ELFPARSE_H_
#define _ELFPARSE_H_
#include <elf.h>
/*
* These structs come from elf.h
* The version in elf.h do not pack these structs so
* portability could be an issue.
* The compiler could mess with aligmment depending on arch
* so I'm redefining them here and packing them to 1-byte alignment.
*/
#if !defined(EI_NIDENT)
#define EI_NIDENT (16)
#endif
#pragma pack(push)
#pragma pack(1)
typedef struct
{
unsigned char e_ident[EI_NIDENT]; /* Magic number and other info */
Elf32_Half e_type; /* Object file type */
Elf32_Half e_machine; /* Architecture */
Elf32_Word e_version; /* Object file version */
Elf32_Addr e_entry; /* Entry point virtual address */
Elf32_Off e_phoff; /* Program header table file offset */
Elf32_Off e_shoff; /* Section header table file offset */
Elf32_Word e_flags; /* Processor-specific flags */
Elf32_Half e_ehsize; /* ELF header size in bytes */
Elf32_Half e_phentsize; /* Program header table entry size */
Elf32_Half e_phnum; /* Program header table entry count */
Elf32_Half e_shentsize; /* Section header table entry size */
Elf32_Half e_shnum; /* Section header table entry count */
Elf32_Half e_shstrndx; /* Section header string table index */
} Minijail_Elf32_Ehdr;
typedef struct
{
unsigned char e_ident[EI_NIDENT]; /* Magic number and other info */
Elf64_Half e_type; /* Object file type */
Elf64_Half e_machine; /* Architecture */
Elf64_Word e_version; /* Object file version */
Elf64_Addr e_entry; /* Entry point virtual address */
Elf64_Off e_phoff; /* Program header table file offset */
Elf64_Off e_shoff; /* Section header table file offset */
Elf64_Word e_flags; /* Processor-specific flags */
Elf64_Half e_ehsize; /* ELF header size in bytes */
Elf64_Half e_phentsize; /* Program header table entry size */
Elf64_Half e_phnum; /* Program header table entry count */
Elf64_Half e_shentsize; /* Section header table entry size */
Elf64_Half e_shnum; /* Section header table entry count */
Elf64_Half e_shstrndx; /* Section header string table index */
} Minijail_Elf64_Ehdr;
typedef struct
{
Elf32_Word p_type; /* Segment type */
Elf32_Off p_offset; /* Segment file offset */
Elf32_Addr p_vaddr; /* Segment virtual address */
Elf32_Addr p_paddr; /* Segment physical address */
Elf32_Word p_filesz; /* Segment size in file */
Elf32_Word p_memsz; /* Segment size in memory */
Elf32_Word p_flags; /* Segment flags */
Elf32_Word p_align; /* Segment alignment */
} Minijail_Elf32_Phdr;
typedef struct
{
Elf64_Word p_type; /* Segment type */
Elf64_Word p_flags; /* Segment flags */
Elf64_Off p_offset; /* Segment file offset */
Elf64_Addr p_vaddr; /* Segment virtual address */
Elf64_Addr p_paddr; /* Segment physical address */
Elf64_Xword p_filesz; /* Segment size in file */
Elf64_Xword p_memsz; /* Segment size in memory */
Elf64_Xword p_align; /* Segment alignment */
} Minijail_Elf64_Phdr;
#pragma pack(pop)
/* End of definitions from elf.h */
enum ElfTypeEnum { ELFERROR=0, ELFSTATIC=1, ELFDYNAMIC=2 };
typedef enum ElfTypeEnum ElfType;
/*
* This is the initial amount of the ELF file we try and read.
* It is the same value that the kernel uses (BINPRM_BUF_SIZE).
*/
#define HEADERSIZE 128
ElfType get_elf_linkage(const char *path);
#endif /* _ELFPARSE_H_ */
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