elf.h

来自「umon bootloader source code, support mip」· C头文件 代码 · 共 148 行

/* elf.h:
 *	Used to support ELF file format in TFS.
 *	The data in this header file is built primarily from information in
 *	the book "Understanding ELF Object Files and Debugging Tools"
 *	All page references in comments refer to that book.
 *
 *	General notice:
 *	This code is part of a boot-monitor package developed as a generic base
 *	platform for embedded system designs.  As such, it is likely to be
 *	distributed to various projects beyond the control of the original
 *	author.  Please notify the author of any enhancements made or bugs found
 *	so that all may benefit from the changes.  In addition, notification back
 *	to the author will allow the new user to pick up changes that may have
 *	been made by other users after this version of the code was distributed.
 *
 *	Note1: the majority of this code was edited with 4-space tabs.
 *	Note2: as more and more contributions are accepted, the term "author"
 *		   is becoming a mis-representation of credit.
 *
 *	Original author:	Ed Sutter
 *	Email:				[e-mail]
 *	Phone:				[phone]
 */

typedef unsigned short	Elf32_Half;
typedef unsigned long	Elf32_Word;
typedef unsigned long   Elf32_Addr;
typedef unsigned long	Elf32_Off;

/* Size of ELF identification field. */
#define EI_NIDENT	16

/* e_type values... */
#define ET_NONE		0
#define ET_REL		1
#define ET_EXEC		2
#define ET_DYN		3
#define ET_CORE		4
#define ET_LOPROC	0xff00
#define ET_HIPROC	0xffff


struct elf_fhdr {		/* pg 12 */
	unsigned char	e_ident[EI_NIDENT];
	Elf32_Half		e_type;
	Elf32_Half		e_machine;
	Elf32_Word		e_version;
	Elf32_Addr		e_entry;
	Elf32_Off		e_phoff;
	Elf32_Off		e_shoff;
	Elf32_Word		e_flags;
	Elf32_Half		e_ehsize;
	Elf32_Half		e_phentsize;
	Elf32_Half		e_phnum;
	Elf32_Half		e_shentsize;
	Elf32_Half		e_shnum;
	Elf32_Half		e_shstrndx;
};

#define ELFFHDR	struct elf_fhdr

/* sh_flags values... */
#define SHF_WRITE		0x1
#define SHF_ALLOC		0x2
#define SHF_EXECINSTR	0x4
#define SHF_MASKPROC	0xf0000000

/* sh_type values... */
#define SHT_NULL		0
#define SHT_PROGBITS	1
#define SHT_SYMTAB		2
#define SHT_STRTAB		3
#define SHT_RELA		4
#define SHT_HASH		5
#define SHT_DYNAMIC		6
#define SHT_NOTE		7
#define SHT_NOBITS		8
#define SHT_REL			9
#define SHT_SHLIB		10
#define SHT_DYNSYM		11
#define SHT_LOPROC		0x70000000
#define SHT_HIPROC		0x7fffffff
#define SHT_LOUSER		0x80000000
#define SHT_HIUSER		0x8fffffff

struct elf_shdr {		/* pg 19 */
	Elf32_Word		sh_name;
	Elf32_Word		sh_type;
	Elf32_Word		sh_flags;
	Elf32_Addr		sh_addr;
	Elf32_Off		sh_offset;
	Elf32_Word		sh_size;
	Elf32_Word		sh_link;
	Elf32_Word		sh_info;
	Elf32_Word		sh_addralign;
	Elf32_Word		sh_entsize;
};

#define ELFSHDR	struct elf_shdr

#define PT_NULL		0
#define PT_LOAD		1
#define PT_DYNAMIC	2
#define PT_INTERP	3
#define PT_NOTE		4
#define PT_SHLIB	5
#define PT_PHDR		6
#define PT_LOPROC	0x70000000
#define PT_HIPROC	0x7fffffff

struct elf_phdr {		/* pg 42 */
	Elf32_Word		p_type;
	Elf32_Off		p_offset;
	Elf32_Addr		p_vaddr;
	Elf32_Addr		p_paddr;
	Elf32_Word		p_filesz;
	Elf32_Word		p_memsz;
	Elf32_Word		p_flags;
	Elf32_Word		p_align;
};

#define ELFPHDR	struct elf_phdr

#define STB_LOCAL	0
#define STB_GLOBAL	1
#define STB_WEAK	2
#define STB_LOPROC	13
#define STB_HIPROC	15

#define STT_NOTYPE	0
#define STT_OBJECT	1
#define STT_FUNC	2
#define STT_SECTION	3
#define STT_FILE	4
#define STT_LOPROC	13
#define STT_HIPROC	15

#define SHN_UNDEF	0

struct elf_sym {
	Elf32_Word		st_name;
	Elf32_Addr		st_value;
	Elf32_Word		st_size;
	unsigned char	st_info;
	unsigned char	st_other;
	Elf32_Half		st_shndx;
};