103 lines
3.6 KiB
C
103 lines
3.6 KiB
C
/* The ELF header resides at the beginning of an ELF file.
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* It identifies the file as an ELF file and contains the information
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* necessary for interpreting the contents of the file and locating
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* the other components of the file.
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* REF: https://gabi.xinuos.com/elf/02-eheader.html#elf-header
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*/
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#ifndef BFPG_ELF_HEADER_H
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# define BFPG_ELF_HEADER_H
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# include "eint.h"
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# define EI_NIDENT (16)
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typedef struct {
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unsigned char e_ident[EI_NIDENT];
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Elf32_Half e_type;
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Elf32_Half e_machine;
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Elf32_Word e_version;
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Elf32_Addr e_entry;
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Elf32_Off e_phoff;
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Elf32_Off e_shoff;
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Elf32_Word e_flags;
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Elf32_Half e_ehsize;
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Elf32_Half e_phentsize;
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Elf32_Half e_phnum;
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Elf32_Half e_shentsize;
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Elf32_Half e_shnum;
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Elf32_Half e_shstrndx;
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} Elf32_Ehdr;
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typedef struct {
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unsigned char e_ident[EI_NIDENT];
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Elf64_Half e_type;
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Elf64_Half e_machine;
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Elf64_Word e_version;
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Elf64_Addr e_entry;
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Elf64_Off e_phoff;
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Elf64_Off e_shoff;
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Elf64_Word e_flags;
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Elf64_Half e_ehsize;
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Elf64_Half e_phentsize;
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Elf64_Half e_phnum;
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Elf64_Half e_shentsize;
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Elf64_Half e_shnum;
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Elf64_Half e_shstrndx;
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} Elf64_Ehdr;
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/* == ElfN_Ehdr.e_ident[] ==
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* EI_* macros define indexes into this this, and are followed
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* by a series a macros defining legal values for that index.
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*/
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/* XXX: WARNING: TODO :WARNING :XXX */
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# define E_IDENT_DESC ( \
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"The initial bytes of an ELF file.\n\n" \
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"Marks the file as an object file and provides machine-independent " \
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"data with which to parse and interpret the file’s contents." )
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/* == ElfN_Ehdr.e_type == */
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enum e_type_t {
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ET_NONE = 0, /* No file type */
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ET_REL = 1, /* Relocatable file */
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ET_EXEC = 2, /* Executable file */
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ET_DYN = 3, /* Shared object file */
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ET_CORE = 4, /* Core file */
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ET_LOOS = 0xfe00, /* OS-specific range start */
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ET_HIOS = 0xfeff, /* OS-specific range end */
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ET_LOPROC = 0xff00, /* Processor-specific range start */
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ET_HIPROC = 0xffff, /* Processor-specific range end */
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};
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# define E_TYPE_DESC ( \
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"Identifies the object file type.\n\n" \
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"ET_CORE is reserved and largely used by core files. " \
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"However the actual file contents are left unspecified. " \
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"Allowing projects to define their own extensions.\n\n" \
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"Values ET_LOOS through ET_HIOS (inclusive) are reserved " \
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"for OS-specific object file types.\n\n" \
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"Values ET_LOPROC through ET_HIPROC (inclusive) are reserved " \
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"for processor-specific object file types." )
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/* == ElfN_Ehdr.e_machine == */
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enum e_machine_t {
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/* XXX: WARNING: TODO :WARNING :XXX */
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};
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#define E_MACHINE_DESC ()
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/* == ElfN_Ehdr.e_version == */
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enum e_version_t {
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EV_NONE = 0, /* Invalid version */
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EV_CURRENT = 1, /* Current Version */
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};
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#define E_VERSION_DESC ( \
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"Version of ELF used.\n\n" \
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"EV_CURRENT signifies the original file format. " \
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"Extensions will use higher e_machine numbers" )
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/* == ElfN_Ehdr.e_entry == */
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#define E_ENTRY_DESC ( \
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"Virtual address of the entry point.\n\n" \
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"The system first transfers control to this virtual address, " \
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"thus starting the process. If the file has no associated entry point, " \
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"this member holds zero." )
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#endif /* BFPG_ELF_HEADER_H */
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