̾??

elf — ELF ?¹Է????Х??ʥ??ե??????Υե????ޥå?

????

<elf.h>

????

?إå??ե????? <elf.h> ?ϡ?ELF ?¹Է????Х??ʥ??ե??????Υե????ޥåȤ????????Ƥ??ޤ??? ELF ?ˤ????̤μ¹Բ?ǽ?ե????롢?????ֲ?ǽ?ʥ??֥??????ȥե????롢 ?????ե????롢??ͭ?饤?֥??꤬?????ޤ???

ELF ?ե??????ե????ޥåȤ??ȤäƤ??? ?¹Բ?ǽ?ե??????? ELF ?إå????????ޤ??? ?????ơ??ץ????????إå??ơ??֥뤫?? ???????????إå??ơ??֥롢???뤤?Ϥ???ξ????³???ޤ??? ELF ?إå??ϡ????˥ե??????Υ??ե??å? 0 ?ˤ????ޤ??? ?ץ????????إå??ơ??֥??? ???????????إå??ơ??֥??Υե????????Υ??ե??åȤϡ? ELF ?إå????????????Ƥ??ޤ??? 2 ?ĤΥơ??֥??ϡ??ե?????????ħ?λĤ?????ʬ?򵭽Ҥ??ޤ???

?ͥ??ƥ??֥??????ƥ??????? ELF ?Х??ʥ??ե??????????????륢?ץꥱ?????????ϡ? ???Υ??????????ɤ? <elf.h> ?򥤥󥯥롼?ɤ????????Ǥ??ߤޤ??? ???????Υ??ץꥱ?????????ϡ?????̾ “Elf_xxx” ?ˤ??????????פȹ?¤?Τؤλ??Ȥ??ޤ?ɬ?פ????ꡢ “ELF_xxx” ?ˤ????ޥ????ؤλ??Ȥ??ޤ?ɬ?פ??????Ǥ??礦?? ???Τ褦?ˤ??Ƶ??Ҥ??줿???ץꥱ?????????ϡ? ?ɤΤ褦?ʥ??????ƥ??????Ǥ??äƤ⡢ ?ۥ??Ȥ? 32 ?ӥåȤʤΤ??????뤤?? 64 ?ӥåȤʤΤ? ?Ȥ??????Ȥ򵤤ˤ??ʤ??ǡ??????ѥ?????ǽ?Ǥ???

̤?ΤΥ??????ƥ??????? ELF ?ե???????????????ɬ?פ????륢?ץꥱ?????????ϡ? <elf.h> ?ǤϤʤ??? <sys/elf32.h> ?? <sys/elf64.h> ??ξ???򥤥󥯥롼?ɤ???ɬ?פ??????ޤ??? ?????ˡ????ƤΥ????פȹ?¤?Τϡ? “Elf32_xxx” ?? “Elf64_xxx” ?ˤ??äƶ??̤???ɬ?פ??????ޤ??? ?ޥ????ϡ? “ELF32_xxx” ?ޤ??? “ELF64_xxx” ?ˤ??äƶ??̤???ɬ?פ??????ޤ???

?????ƥ??Υ??????ƥ????㤬???Ȥ????Ǥ??äƤ⡢???? <sys/elf_generic.h> ?????Ǥʤ??? <sys/elf_common.h> ?⥤?󥯥롼?ɤ??ޤ???

???????Υإå??ե??????Ǥϡ? ???Ǹ??ڤ????إå??? C ??¤?ΤȤ??Ƶ??Ҥ??? ?????˲ä???ưŪ???????????? ?????֥??????????ȥ????ܥ??ơ??֥??Τ????ι?¤?Τ??ޤ??Ǥ??ޤ???

?ʲ??Υ????פ???32 ?ӥåȥ??????ƥ??????Τ????˻Ȥ????Ƥ??ޤ?:

Elf32_Addr	????̵???ץ??????ॢ?ɥ쥹
Elf32_Half	????̵???ϡ??ե?ɥե???????
Elf32_Off	????̵???ե????륪?ե??å?
Elf32_Sword	?????դ???????
Elf32_Word	?ե??????ɤޤ???????̵????????
Elf32_Size	????̵?????֥??????ȥ?????

64 ?ӥåȥ??????ƥ??????Ѥ˰ʲ??Υ????פ??Ѱդ????Ƥ??ޤ?:

Elf64_Addr	????̵???ץ??????ॢ?ɥ쥹
Elf64_Half	????̵???ϡ??ե?ɥե???????
Elf64_Off	????̵???ե????륪?ե??å?
Elf64_Sword	?????դ???????
Elf64_Word	?ե??????ɤޤ???????̵????????
Elf64_Size	????̵?????֥??????ȥ?????
Elf64_Quarter	????̵????????????ɥե???????

ELF ?ե??????ե????ޥåȤ????????????ƤΥǡ?????¤?ϡ? ??Ϣ???륯?饹?Τ????? “??????” ???????ȶ???Ĵ???Υ????ɥ饤???˽??äƤ??ޤ??? ɬ?פʤ??С??ǡ?????¤?ϡ?4 ?Х??ȥ??֥??????Ȥ? 4 ?Х??ȶ????Ȥʤ뤳?Ȥ??ݾڤ??뤿???ˡ? ??¤?ΤΥ???????????Ū?? 4 ???ܿ??ˤ????Ȥ????ä????ʤǡ? ????Ū?ʥѥǥ??󥰤??ޤ??ޤ???

ELF ?إå??ϡ?Elf32_Ehdr ???ޤ??? Elf64_Ehdr ???ˤ??äƵ??Ҥ????Ƥ??ޤ?:

typedef struct {
        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;
} Elf32_Ehdr;

typedef struct {
	unsigned char   e_ident[EI_NIDENT];
	Elf64_Quarter   e_type;
	Elf64_Quarter   e_machine;
	Elf64_Half      e_version;
	Elf64_Addr      e_entry;
	Elf64_Off       e_phoff;
	Elf64_Off       e_shoff;
	Elf64_Half      e_flags;
	Elf64_Quarter   e_ehsize;
	Elf64_Quarter   e_phentsize;
	Elf64_Quarter   e_phnum;
	Elf64_Quarter   e_shentsize;
	Elf64_Quarter   e_shnum;
	Elf64_Quarter   e_shstrndx;
} Elf64_Ehdr;

?ե??????ɤϡ??ʲ??ΰ?̣?????äƤ??ޤ?:

?¹Բ?ǽ?ե??????ޤ??϶?ͭ???֥??????ȥե??????Υץ????????إå??ơ??֥??ϡ? ??¤?Τ??????Ǥ??? ?ƹ?¤?Τϡ? ?ץ????????¹Ԥ˥????ƥबɬ?פȤ??롢?????????????ξ????򵭽Ҥ??ޤ??? ???֥??????ȥե??????? ?????????? ?ϡ?1 ?İʾ??? ?????????? ???ޤߤޤ??? ?ץ????????إå??ϡ? ?¹Բ?ǽ?ե??????ȶ?ͭ???֥??????ȥե??????????ǰ?̣???????ޤ??? ?ե??????ϡ?ELF ?إå??? e_phentsize ?? e_phnum ?????ФǤ??켫?ȤΥץ????????إå????????????ꤷ?ޤ??? ELF ?¹Է????Υإå???Ʊ?ͤˡ? ?ץ????????إå??⥢?????ƥ??????˽????ۤʤ??С??????????????ޤ?:

typedef struct {
        Elf32_Word      p_type;
        Elf32_Off       p_offset;
        Elf32_Addr      p_vaddr;
        Elf32_Addr      p_paddr;
        Elf32_Size      p_filesz;
        Elf32_Size      p_memsz;
        Elf32_Word      p_flags;
        Elf32_Size      p_align;
} Elf32_Phdr;

typedef struct {
        Elf64_Half      p_type;
        Elf64_Half      p_flags;
        Elf64_Off       p_offset;
        Elf64_Addr      p_vaddr;
        Elf64_Addr      p_paddr;
        Elf64_Size      p_filesz;
        Elf64_Size      p_memsz;
        Elf64_Size      p_align;
} Elf64_Phdr;

32 ?ӥåȤ? 64 ?ӥåȤΥץ????????إå??δ֤μ??ʺ??ϡ? ??¤?????? p_flags ?????Фΰ??֤????Ǥ???

?ե??????Υ??????????إå??ơ??֥??ϡ? ???ƤΥե??????Υ??????????ΰ??ַ???????ǽ?Ȥ??ޤ??? ???????????إå??ơ??֥??ϡ?Elf32_Shdr ?ޤ??? Elf64_Shdr ??¤?Τ??????Ǥ??? ELF ?إå??? e_shoff ?????Фϡ? ???????????إå??ơ??֥??Ρ??ե???????Ƭ?????ΥХ??ȥ??ե??åȤ?Ϳ???ޤ??? e_shnum ?ϡ????????????إå??ơ??֥??Υ????ȥ??????????ޤ??? e_shentsize ?ϡ??ƥ????ȥ????礭?????Х??Ȥǻ????ޤ???

???????????إå??ơ??֥륤???ǥå????ϡ???????????ź???Ǥ??? ???????????إå??ơ??֥륤???ǥå????ˤϡ?ͽ???Τ??Τ??????ޤ??? ???֥??????ȥե??????ˤϡ????????̤ʥ????ǥå????ˤϥ????????󤬤????ޤ???:

SHN_UNDEF

?????ͤϡ?̤????????¸?ߤ??ʤ?????̵?ط??Ǥ??뤫?? ??̣???ʤ??????????󻲾Ȥ򼨤??ޤ??? ?㤨?С????????????ֹ? SHN_UNDEF ?????????Ф? “????” ?????륷???ܥ??ϡ?̤?????Υ????ܥ??Ǥ???

SHN_LORESERVE

?????ͤϡ?ͽ???Υ????ǥå??????ϰϤβ??¤????ꤷ?ޤ???

SHN_LOPROC

?????ͤ??? SHN_HIPROC ?ʲ??ϡ??ץ????å???ͭ?Υ??ޥ??ƥ??????Τ?????ͽ?󤵤??Ƥ??ޤ???

SHN_HIPROC

?????ͤ??? SHN_LOPROC ?ʾ??ϡ??ץ????å???ͭ?Υ??ޥ??ƥ??????Τ?????ͽ?󤵤??Ƥ??ޤ???

SHN_ABS

?????ͤϡ??б????뻲?Ȥ??????ͤǤ??뤳?Ȥ????ꤷ?ޤ??? ?㤨?С????????????ֹ? SHN_ABS ?????????Ф??????????륷???ܥ??ϡ?????Ū?ʿ??ͤ??????? ?????֤ˤ??äƱƶ????????ޤ?????

SHN_COMMON

???Υ????????󤫤??????Ф??????????륷???ܥ??ϡ????̥????ܥ??Ǥ??ꡢ Fortran ?? COMMON ???ΰ褬???ݤ????Ƥ??ʤ? C ?γ????ѿ??????????ޤ???

SHN_HIRESERVE

?????ͤϡ?ͽ?󥤥??ǥå????ϰϤξ??¤????ꤷ?ޤ??? ?????ϰϤϡ? SHN_LORESERVE ?? SHN_HIRESERVE ?δ֤Ǥ??ꡢξü???ޤߤޤ??? ???????????إå??ơ??֥??ϡ?ͽ???Υ????ǥå????Τ????˥????ȥ????ޤߤޤ?????

???????????إå??ϡ??ʲ??ι?¤?Τ??????ޤ?:

typedef struct {
	Elf32_Word      sh_name;
	Elf32_Word      sh_type;
	Elf32_Word      sh_flags;
	Elf32_Addr      sh_addr;
	Elf32_Off       sh_offset;
	Elf32_Size      sh_size;
	Elf32_Word      sh_link;
	Elf32_Word      sh_info;
	Elf32_Size      sh_addralign;
	Elf32_Size      sh_entsize;
} Elf32_Shdr;

typedef struct {
	Elf64_Half      sh_name;
	Elf64_Half      sh_type;
	Elf64_Size      sh_flags;
	Elf64_Addr      sh_addr;
	Elf64_Off       sh_offset;
	Elf64_Size      sh_size;
	Elf64_Half      sh_link;
	Elf64_Half      sh_info;
	Elf64_Size      sh_addralign;
	Elf64_Size      sh_entsize;
} Elf64_Shdr;

sh_name

???Υ????Фϡ?????????????̾???????ꤷ?ޤ??? ?????ͤϡ????????????إå?ʸ?????ơ??֥륻?????????ؤ? ?????ǥå????Ǥ??ꡢ?̥?ʸ???ǽ?????ʸ?????ξ?????Ϳ???ޤ???

sh_type

???Υ????Фϡ????????????????Ƥȥ??ޥ??ƥ???????ʬ?ष?ޤ???

SHT_NULL

?????ͤϡ????????????إå????Գ????Ǥ??뤳?Ȥ򼨤??ޤ??? ??Ϣ?Ť????줿?????????????????ޤ????? ???????????إå???¾?Υ????Фϡ?̤?????ͤ??????ޤ???

SHT_PROGBITS

???Υ??????????ϡ??ץ????????ˤ??ä??????????????????????ޤ??? ?ե????ޥåȤȰ?̣?ϡ??ץ????????????ˤ??äƤΤ߷??ꤵ???ޤ???

SHT_SYMTAB

???Υ??????????ϡ??????ܥ??ơ??֥????????ޤ??? ????Ū?ˡ? SHT_SYMTAB ?ϥ??󥯥??ǥ??åȤΤ????Υ????ܥ????󶡤??ޤ??? ?????Ϥޤ???ưŪ???󥯤ˤ????Ѳ?ǽ?Ǥ??? ?????ϴ????ʥ????ܥ??ơ??֥??Ǥ??뤿?ᡢ ưŪ???󥯤Τ????ˤ???ɬ?פ?¿???Υ????ܥ????ޤ????礬?????ޤ??? ???֥??????ȥե??????ϡ? SHN_DYNSYM ?????????????ޤळ?Ȥ??Ǥ??ޤ???

SHT_STRTAB

???Υ??????????ϡ?ʸ?????ơ??֥????????ޤ??? ???֥??????ȥե??????ϡ?ʣ????ʸ?????ơ??֥륻?????????????????ޤ???

SHT_RELA

???Υ??????????ϡ?????Ū?ʲÿ??????ġ??????֥????ȥ????????ޤ??? ?㤨?С????֥??????ȥե??????? 32 ?ӥåȥ??饹?Υ????? Elf32_Rela ?????????ޤ??? ???֥??????Ȥϡ?ʣ???κ????֥??????????????????ޤ???

SHT_HASH

???Υ??????????ϡ??????ܥ??ϥå????ơ??֥????????ޤ??? ưŪ???󥯤˴?Ϣ?????????֥??????Ȥϡ? ?????ܥ??ϥå????ơ??֥????ޤ?ɬ?פ??????ޤ??? ???֥??????ȥե??????ϡ?ñ???Υϥå????ơ??֥??Τߤ????????ޤ???

SHT_DYNAMIC

???Υ??????????ϡ?ưŪ???󥯤Τ????˾??????????ޤ??? ???֥??????ȥե??????ϡ?ñ????ưŪ???????????Τߤ????????ޤ???

SHT_NOTE

???Υ??????????ϡ??????Ф???????ˡ?ǥե??????˰??򤹤????????????ޤ???

SHT_NOBITS

???Υ????פΥ??????????ϡ??ե????????ζ??֤???ͭ???ޤ??󤬡? SHN_PROGBITS ?˻??Ƥ??ޤ??? ???Υ??????????ϥХ??Ȥ??ޤߤޤ??󤬡? sh_offset ?????Фϳ?ǰ???Υե????륪?ե??åȤ??ޤߤޤ???

SHT_REL

???Υ??????????ϡ?????Ū?ʲÿ?̵???κ????֥??ե??åȤ??????ޤ??? ?㤨?С????֥??????ȥե??????? 32 ?ӥåȥ??饹?Υ????? Elf32_Rel ?????????ޤ??? ???֥??????ȥե??????ϡ?ʣ???κ????֥??????????????????ޤ???

SHT_SHLIB

???Υ??????????ϡ?ͽ?󤵤??Ƥ??ꡢ?????????Ƥ??ʤ????ޥ??ƥ????????????ޤ???

SHT_DYNSYM

???Υ??????????ϡ?ưŪ???󥯥????ܥ??κǾ??Υ??åȤ??????ޤ??? ???֥??????ȥե??????ϡ? SHN_SYMTAB ?????????????ޤळ?Ȥ??Ǥ??ޤ???

SHT_LOPROC

?????ͤ??? SHT_HIPROC ?ʲ??ϡ??ץ????å???ͭ?Υ??ޥ??ƥ??????Τ?????ͽ?󤵤??Ƥ??ޤ???

SHT_HIPROC

?????ͤ??? SHT_LOPROC ?ʾ??ϡ??ץ????å???ͭ?Υ??ޥ??ƥ??????Τ?????ͽ?󤵤??Ƥ??ޤ???

SHT_LOUSER

?????ͤϡ????ץꥱ?????????ץ????????Τ?????ͽ?󤵤??Ƥ??? ?????ǥå????ϰϤβ??¤????ꤷ?ޤ???

SHT_HIUSER

?????ͤϡ????ץꥱ?????????ץ????????Τ?????ͽ?󤵤??Ƥ??? ?????ǥå????ϰϤξ??¤????ꤷ?ޤ??? SHT_LOUSER ?? SHT_HIUSER ?δ֤Υ????????󥿥??פϡ? ???ץꥱ?????????ˤ??äƻ??Ѳ?ǽ?Ǥ??ꡢ ???ߤޤ??Ͼ????Υ????ƥ??????????????󥿥??פȾ??ͤ??ޤ?????

sh_flags

???????????ϡ???¿??°???򵭽Ҥ??? 1 ?ӥåȥե饰?򥵥ݡ??Ȥ??ޤ??? ?ե饰?ӥåȤ? sh_flags ?ǥ??åȤ??????ʤ??С????Υ???????????°???? “????” ?ˤʤ??ޤ??? ?????Ǥʤ????С?°???? “????” ?Ǥ??뤫?????ƤϤޤ??ޤ????? ̤????°???ϡ?0 ?˥??åȤ????ޤ???

SHF_WRITE

???????????ϡ??ץ??????¹Ԥδ֡??񤭹??߲?ǽ?Ǥ????٤??ǡ??????ޤߤޤ???

SHF_ALLOC

???????????ϡ??ץ??????¹Ԥδ֡???????????ͭ???ޤ??? ???楻?????????ˤϡ? ???֥??????ȥե??????Υ????ꥤ?᡼????¸?ߤ??ʤ????Τ??????ޤ??? ???Τ褦?ʥ??????????Ǥϡ?????°???ϥ??դǤ???

SHF_EXECINSTR

???????????ϡ??¹Բ?ǽ?ʵ?????̿?????ޤߤޤ???

SHF_MASKPROC

???Υޥ????Ǵޤޤ??????ƤΥӥåȤϡ? ?ץ????å???ͭ?Υ??ޥ??ƥ??????Τ????˳??ݤ????ޤ???

sh_addr

?????????󤬥ץ??????Υ????ꥤ?᡼???˸????????硢 ???Υ????Фϡ????????????κǽ??ΥХ??Ȥ?¸?ߤ??륢?ɥ쥹???????ޤ??? ?????Ǥʤ????硢???Υ????Ф? 0 ???ޤߤޤ???

sh_offset

???Υ??????ͤϡ? ???Υ??????????Ρ??ե???????Ƭ?????ΥХ??ȥ??ե??åȤ?Ϳ???ޤ??? 1 ?ĤΥ????????󥿥??ס????ʤ??? SHT_NOBITS ?ϡ??ե????????ζ??֤???ͭ?????? ???? sh_offset ?????Фϡ??ե????????γ?ǰ???ΰ??֤????ꤷ?ޤ???

sh_size

???Υ????Фϡ????????????ΥХ??ȤǤ??礭?????????ޤ??? ?????????󥿥??פ? SHT_NOBITS ?Ǥʤ??¤ꡢ???????????ϥե????????? sh_size ?Х??Ȥ???ͭ???ޤ??? ?????? SHT_NOBITS ?Υ??????????? 0 ?ʳ????礭???????????ޤ????? ?ե????????ζ??֤???ͭ???ޤ?????

sh_link

???Υ????Фϡ? ???????????إå??ơ??֥륤???ǥå??????󥯤??????ޤ??? ???β????ϡ??????????󥿥??װ?¸?Ǥ???

sh_info

???Υ????Фϡ? ?ɲþ??????????ޤ??? ???β????ϡ??????????󥿥??װ?¸?Ǥ???

sh_addralign

?㴳?Υ??????????ˤϡ????ɥ쥹?????????󤬤????ޤ??? ?????????󤬥??֥???ɤ????Ĥʤ??С? ?????ƥ??ϥ??֥???ɶ????? ?????????????Τ??ݾڤ???ɬ?פ??????ޤ??? sh_addr ???ͤϡ? sh_addralign ?dz??ä??ͤ? 0 ?Ȥʤ뤳?Ȥ?ɬ?פǤ??? 0 ?????? 2 ??沾??????????????ޤ???0 ?ޤ??? 1 ???ͤϡ? ???????????ˤ϶????????󤬤ʤ????Ȥ???̣???ޤ???

sh_entsize

?㴳?Υ??????????ϡ? ????Ĺ?????ȥ??Υơ??֥????????ޤ??? ?㤨?Х????ܥ??ơ??֥뤬?????˳??????ޤ??? ???Τ褦?ʥ??????????Τ????ˡ? ???Υ????Фϡ??ƥ????ȥ??ΥХ??ȤǤ??礭????Ϳ???ޤ??? ?????????󤬸??ꥵ?????Υ????ȥ??Υơ??֥????????ʤ??ʤ??С? ???Υ????Ф? 0 ???ޤߤޤ???

?͡??ʥ????????󤬡??ץ????????????????????????ޤ?:

.bss

???Υ??????????Ͻ??????????ʤ??ǡ??????????? ?ץ????????Υ????ꥤ?᡼???ˤʤ??ޤ??? ?????Ǥϡ? ?ץ??????೫?ϻ??˥????ƥब?ǡ????? 0 ?????????ޤ??? ???Υ??????????ϡ??????? SHT_NOBITS ?Ǥ??? °???????פϡ? SHF_ALLOC ?? SHF_WRITE ?Ǥ???

.comment

???Υ??????????ϡ??С??????????????????????ޤ??? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? °???????פϻȤ????ޤ?????

.data

???Υ??????????Ͻ????????줿?ǡ??????????? ?ץ????????Υ????ꥤ?᡼???ˤʤ??ޤ??? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? °???????פϡ? SHF_ALLOC ?? SHF_WRITE ?Ǥ???

.data1

???Υ??????????Ͻ????????줿?ǡ??????????? ?ץ????????Υ????ꥤ?᡼???ˤʤ??ޤ??? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? °???????פϡ? SHF_ALLOC ?? SHF_WRITE ?Ǥ???

.debug

???Υ??????????ϡ??????ܥ??å??ǥХå??󥰤Τ????ξ??????????ޤ??? ???Ƥϡ??????????Ƥ??ޤ????? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? °???????פϻȤ????ޤ?????

.dynamic

???Υ??????????ϡ?ưŪ???󥯾??????????ޤ??? ????????????°???ϡ? SHF_ALLOC ?ӥåȤ??ޤߤޤ??? SHF_WRITE ?ӥåȤ????åȤ????뤫?ݤ??ϡ??ץ????å???¸?Ǥ??? ???Υ??????????ϡ??????? SHT_DYNAMIC ?Ǥ??? ????°???򸫤Ƥ?????????

.dynstr

???Υ??????????ϡ?ưŪ???󥯤Τ?????ɬ?פȤ?????ʸ???????????ޤ??? ?????ư??̤ˤϡ?̾????ɽ??????ʸ?????Ǥ??ꡢ ?????ܥ??ơ??֥륨???ȥ??ȷ????դ??????Ƥ??ޤ??? ???Υ??????????ϡ??????? SHT_STRTAB ?Ǥ??? ?Ȥ?????°???????פϡ? SHF_ALLOC ?Ǥ???

.dynsym

???Υ??????????ϡ?ưŪ???󥯥????ܥ??ơ??֥????????ޤ??? ???Υ??????????ϡ??????? SHT_DYNSYM ?Ǥ??? ?Ȥ?????°???ϡ? SHF_ALLOC ?Ǥ???

.fini

???Υ??????????ϡ??ץ???????λ?????ɤμ¹Բ?ǽ̿?????????ޤ??? ?ץ????????????ｪλ???ˡ? ?????ƥ??Ϥ??Υ??????????Υ????ɤ??¹Ԥ??ޤ??? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? ?Ȥ?????°???ϡ? SHF_ALLOC ?? SHF_EXECINSTR ?Ǥ???

.got

???Υ??????????ϡ????????Х륪?ե??åȥơ??֥????????ޤ??? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? °???ϡ??ץ????å???¸?Ǥ???

.hash

???Υ??????????ϡ??????ܥ??ϥå????ơ??֥????????ޤ??? ???Υ??????????ϡ??????? SHT_HASH ?Ǥ??? ?Ȥ?????°???ϡ? SHF_ALLOC ?Ǥ???

.init

???Υ??????????ϡ??ץ????????????????ɤμ¹Բ?ǽ̿?????????ޤ??? ?ץ????????¹Գ??ϻ??ˡ? ?ᥤ???ץ??????२???ȥ??ݥ????Ȥ??ƤӽФ????ˡ? ?????ƥ??Ϥ??Υ??????????Υ????ɤ??¹Ԥ??ޤ??? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? ?Ȥ?????°???ϡ? SHF_ALLOC ?? SHF_EXECINSTR ?Ǥ???

.interp

???Υ??????????ϡ??ץ??????।?󥿥ץ꥿?Υѥ?̾???????ޤ??? ?ե????뤬???Υ????????????ޤ??????ɲ?ǽ?ʥ????????Ȥ????Ĥʤ??С? ????????????°???? SHF_ALLOC ?ӥåȤ??ޤߤޤ??? ?????Ǥʤ????硢???ΥӥåȤϥ??դǤ??? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ???

.line

???Υ??????????ϥ????ܥ??å??ǥХå??󥰤Τ????˹??ֹ????????????ޤ??? ?????ϡ??ץ??????ॽ?????ȥޥ??󥳡??ɤδ֤δط??򵭽Ҥ??ޤ??? ???Ƥϡ??????????Ƥ??ޤ????? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? °???????פϻȤ????ޤ?????

.note

???Υ??????????ϡ????ǵ??Ҥ????? “Note Section” ?ե????ޥåȤǡ????????????ޤ??? ???Υ??????????ϡ??????? SHT_NOTE ?Ǥ??? °???????פϻȤ????ޤ?????

.plt

???Υ??????????ϡ??ץ????????????󥱡????ơ??֥????????ޤ??? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? °???ϥץ????å???¸?Ǥ???

.relNAME

???Υ??????????ϡ??????Τ褦?˺????־??????????ޤ??? ?ե????뤬?????֤??ޤ??????ɲ?ǽ?ʥ????????Ȥ????Ĥʤ??С? ????????????°???? SHF_ALLOC ?ӥåȤ??ޤߤޤ??? ?????Ǥʤ????硢???ΥӥåȤϥ??դǤ??? ?????ˤ??ꡢ?????֤????륻???????󤫤? “NAME” ??Ϳ???????ޤ??? .text ?Τ????κ????֥??????????ϡ??̾?̾?? .rel.text ???????ޤ??? ???Υ??????????ϡ??????? SHT_REL ?Ǥ???

.relaNAME

???Υ??????????ϡ??????Τ褦?˺????־??????????ޤ??? ?ե????뤬?????֤??ޤ??????ɲ?ǽ?ʥ????????Ȥ????Ĥʤ??С? ????????????°???? SHF_ALLOC ?ӥåȤ??ޤߤޤ??? ?????Ǥʤ????硢???ΥӥåȤϥ??դǤ??? ?????ˤ??ꡢ?????֤????륻???????󤫤? “NAME” ??Ϳ???????ޤ??? .text ?Τ????κ????֥??????????ϡ??̾?̾?? .rela.text ???????ޤ??? ???Υ??????????ϡ??????? SHT_RELA ?Ǥ???

.rodata

???Υ????????????ɤ߼??????ѥǡ??????????? ŵ??Ū?ˤϥץ????????᡼???ν񤭹????Բĥ????????Ȥˤʤ??ޤ??? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? ?Ȥ?????°???ϡ? SHF_ALLOC ?Ǥ???

.rodata1

???Υ????????????ɤ߼??????ѥǡ??????????? ŵ??Ū?ˤϥץ????????᡼???ν񤭹????Բĥ????????Ȥˤʤ??ޤ??? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? ?Ȥ?????°???ϡ? SHF_ALLOC ?Ǥ???

.shstrtab

???Υ??????????ϥ?????????̾???????ޤ??? ???Υ??????????ϡ??????? SHT_STRTAB ?Ǥ??? °???????פϻȤ????ޤ?????

.strtab

???Υ???????????ʸ???????????ޤ??? ????Ū?ˤ?̾????ɽ??????ʸ?????Ǥ??ꡢ ?????ܥ??ơ??֥륨???ȥ??ȷ????դ??????Ƥ??ޤ??? ?ե????뤬?????ܥ?ʸ?????ơ??֥????ޤ??????ɲ?ǽ?ʥ????????Ȥ????Ĥʤ??С? ????????????°???? SHF_ALLOC ?ӥåȤ??ޤߤޤ??? ?????Ǥʤ????硢???ΥӥåȤϥ??դǤ??? ???Υ??????????ϡ??????? SHT_STRTAB ?Ǥ???

.symtab

???Υ??????????ϡ??????ܥ??ơ??֥????????ޤ??? ?ե????뤬?????ܥ??ơ??֥????ޤ??????ɲ?ǽ?ʥ????????Ȥ????Ĥʤ??С? ????????????°???? SHF_ALLOC ?ӥåȤ??ޤߤޤ??? ?????Ǥʤ????硢???ΥӥåȤϥ??դǤ??? ???Υ??????????ϡ??????? SHT_SYMTAB ?Ǥ???

.text

???Υ??????????ϡ??ץ????????? “?ƥ?????” ?????ʤ????¹Բ?ǽ̿?????????ޤ??? ???Υ??????????ϡ??????? SHT_PROGBITS ?Ǥ??? ?Ȥ?????°???ϡ? SHF_ALLOC ?? SHF_EXECINSTR ?Ǥ???

.jcr

???Υ??????????ϡ???Ͽ??????ɬ?פ????? Java ???饹?ξ??????????ޤ???

.eh_frame

???Υ??????????ϡ?C++ ?㳰?????˻??Ѥ????????????????ޤ???

ʸ?????ơ??֥륻?????????ϡ??̥?ʸ???ǽ?????ʸ?????????󥹷????????ޤ??? ???????ϡ????̤?ʸ?????ȸƤФ??ޤ??? ???֥??????ȥե??????ϡ? ?????ܥ??ȥ?????????̾??ɽ?????뤿???ˤ???????ʸ???????Ȥ??ޤ??? ʸ?????ơ??֥륻?????????Υ????ǥå????Ȥ??ơ?ʸ?????򻲾Ȥ??ޤ??? ?ǽ??ΥХ??? (?????ǥå??? 0) ?ϡ? ñ???Υ̥?ʸ???????Ĥ??????????ޤ??? Ʊ?ͤˡ?ʸ?????ơ??֥??κǽ??Х??Ȥϥ̥?ʸ???Ǥ??????????????Τǡ? ʸ???????Τ??ʥ뽪ü?????Ƥ??뤳?Ȥ??ݾڤ??ޤ???

???֥??????ȥե??????Υ????ܥ??ơ??֥??ϡ? ?ץ????????Υ????ܥ??????Ȼ??Ȥΰ??ַ?????ɬ?פʾ??????ݻ????ޤ??? ?????ܥ??ơ??֥륤???ǥå????ϡ???????????ź???Ǥ???

typedef struct {
	Elf32_Word      st_name;
	Elf32_Addr      st_value;
	Elf32_Size      st_size;
	unsigned char   st_info;
	unsigned char   st_other;
	Elf32_Half      st_shndx;
} Elf32_Sym;

typedef struct {
	Elf64_Half      st_name;
	unsigned char   st_info;
	unsigned char   st_other;
	Elf64_Quarter   st_shndx;
	Elf64_Addr      st_value;
	Elf64_Size      st_size;
} Elf64_Sym;

st_name

???Υ????Фϡ????֥??????ȥե??????? ?????ܥ?ʸ?????ơ??֥??ؤΥ????ǥå??????????ޤ??? ?????ܥ?ʸ?????ơ??֥??ϡ??????ܥ?̾??ʸ??ɽ?????????ޤ??? ?ͤ? 0 ?ʳ??Ǥ????ʤ??С? ?????ϥ????ܥ?̾??Ϳ????ʸ?????ơ??֥륤???ǥå????򼨤??ޤ??? ?????Ǥʤ????硢?????ܥ??ơ??֥??ˤ?̾?????????ޤ?????

st_value

???Υ????Фϡ???Ϣ?????????ܥ????ͤ?Ϳ???ޤ???

st_size

¿???Υ????ܥ??ϡ???Ϣ?????礭?????????ޤ??? ?????ܥ??ˤ??礭????̵????̤?ΤǤ??????硢???Υ????Ф? 0 ?Ǥ???

st_info

???Υ????Фϡ??????ܥ??Υ????פ?«??°???????ꤷ?ޤ?:

STT_NOTYPE

?????ܥ??Υ????פϡ??????????ޤ?????

STT_OBJECT

?????ܥ??ϡ??ǡ??????֥??????Ȥȷ????դ??????Ƥ??ޤ???

STT_FUNC

?????ܥ??ϡ??ؿ??ޤ???¾?μ¹Բ?ǽ?????ɤȷ????դ??????Ƥ??ޤ???

STT_SECTION

?????ܥ??ϡ????????????ȷ????դ??????Ƥ??ޤ??? ???Υ????פΥ????ܥ??ơ??֥륨???ȥ??ϡ? ???˺????֤Τ?????¸?ߤ??ơ??̾? STB_LOCAL «?????????ޤ???

STT_FILE

?????ˤ??ꡢ?????ܥ???̾???ϡ? ???֥??????ȥե??????ȴ?Ϣ???륽?????ե???????̾????Ϳ???ޤ??? ¸?ߤ??????硢?ե????륷???ܥ??? STB_LOCAL «?????????????Υ????????󥤥??ǥå????? SHN_ABS ?Ǥ??ꡢ ?????ϥե???????¾?? STB_LOCAL ?????ܥ??????Ԥ??ޤ???

STT_LOPROC

?????ͤ??? STT_HIPROC ?ʲ??ϡ??ץ????å??˸?ͭ?Υ??ޥ??ƥ??????Τ?????ͽ?󤵤??Ƥ??ޤ???

STT_HIPROC

?????ͤ??? STT_LOPROC ?ʾ??ϡ??ץ????å??˸?ͭ?Υ??ޥ??ƥ??????Τ?????ͽ?󤵤??Ƥ??ޤ???

STB_LOCAL

?????????ʥ????ܥ??ϡ? ???????????????ޤ??Ǥ??륪?֥??????ȥե??????γ?¦?ˤϡ??????ޤ????? Ʊ??̾???Υ????????ʥ????ܥ??ϡ? ???ߤ??Τ????ޤ򤹤뤳?Ȥʤ?ʣ???ե???????¸?ߤ????ޤ???

STB_GLOBAL

???????Х륷???ܥ??ϡ????礵???Ƥ??????ƤΥ??֥??????ȥե????뤫?鸫???ޤ??? ?????ե??????ˤ??륰?????Х륷???ܥ????????ϡ? ?̥ե???????Ʊ???????ܥ???̤???????Ȥ???­?????ޤ???

STB_WEAK

?夤?????ܥ??ϥ??????Х륷???ܥ??˻??Ƥ??ޤ??? ?????????????????????㤤ͥ?????̤??????ޤ???

STB_LOPROC

?????ͤ??? STB_HIPROC ?ʲ??ϡ??ץ????å??˸?ͭ?Υ??ޥ??ƥ??????Τ?????ͽ?󤵤??Ƥ??ޤ???

STB_HIPROC

?????ͤ??? STB_LOPROC ?ʾ??ϡ??ץ????å??˸?ͭ?Υ??ޥ??ƥ??????Τ?????ͽ?󤵤??Ƥ??ޤ???

«???ȥ????ץե??????ɤΥѥå??????ӥ????ѥå??ѤΥޥ??????????ޤ?:

ELF32_ST_BIND(info)

?ޤ??? ELF64_ST_BIND(info) ?ϡ?«???? st_info ?ͤ??????Ф??ޤ???

ELF64_ST_TYPE(info)

?ޤ??? ELF32_ST_TYPE(info) ?ϡ??????פ? st_info ?ͤ??????Ф??ޤ???

ELF32_ST_INFO(bind, type)

?ޤ??? ELF64_ST_INFO(bind, type) ?ϡ?«???ȥ????פ? st_info ?ͤ??Ѵ????ޤ???

st_other

???Υ????Фϡ????? 0 ???????????????줿??̣???????ޤ?????

st_shndx

???????륷???ܥ??ơ??֥륨???ȥ??ϡ? ?ʤ??餫?Υ??????????˴ؤ??? “?????????Ƥ??ޤ?” ?? ???Υ????Фϡ???Ϣ???륻?????????إå??ơ??֥륤???ǥå??????????ޤ???

?????֤ϡ??????ܥ뻲?Ȥȥ????ܥ?????????³?????????Ǥ??? ?????ֲ?ǽ?ʥե??????ϡ????????Υ????????????Ƥ? ??????ˡ?򵭽Ҥ?????????????ɬ?פ??????ޤ??? ???Τ褦?ˤ??ơ??¹Բ?ǽ?ե??????ȶ?ͭ???֥??????ȥե????뤬?? ?ץ??????Υץ??????।?᡼???Τ????????????????????Ƥޤ??? ?????֥????ȥ??ϡ????????Υǡ????Ǥ???

?ÿ???ɬ?פȤ??ʤ??????ֹ?¤??:

typedef struct {
	Elf32_Addr      r_offset;
	Elf32_Word      r_info;
} Elf32_Rel;

typedef struct {
	Elf64_Addr      r_offset;
	Elf64_Size      r_info;
} Elf64_Rel;

?ÿ???ɬ?פȤ????????ֹ?¤??:

typedef struct {
	Elf32_Addr      r_offset;
	Elf32_Word      r_info;
	Elf32_Sword     r_addend;
} Elf32_Rela;

typedef struct {
	Elf64_Addr      r_offset;
	Elf64_Size      r_info;
	Elf64_Off       r_addend;
} Elf64_Rela;

r_offset

???Υ????Фϡ???????ư????Ŭ?Ѥ?????????Ϳ???ޤ??? ?????ֲ?ǽ?ʥե??????Ǥϡ? ?ͤϡ??????֤ˤ??äƱƶ????????뵭??ñ?̤? ????????????Ƭ?????ΥХ??ȥ??ե??åȤǤ??? ?¹Բ?ǽ?ե??????ޤ??϶??ѥ??֥??????ȤǤϡ? ?ͤϡ??????֤ˤ??äƱƶ????????뵭??ñ?̤β??ۥ??ɥ쥹?Ǥ???

r_info

???Υ????Фϡ? ?????֤????륷???ܥ??ơ??֥륤???ǥå????ȡ? ???Ѥ????????֤Υ????פ?Ϳ???ޤ??? ?????֥????פϡ??ץ????å???¸?Ǥ??? ?ƥ????Ȥ??????֥????ȥ??κ????֥????פޤ??? ?????ܥ??ơ??֥륤???ǥå????򻲾Ȥ????Ȥ??? ?????ȥ??? r_info ?????Ф??Ф??????줾?? ELF_[32|64]_R_TYPE ?ޤ??? ELF[32|64]_R_SYM ??Ŭ?Ѥ??????̤???̣???Ƥ??ޤ???

r_addend

???Υ????Фϡ??????βÿ??????ꤷ?ޤ??? ?????ϡ??????ֲ?ǽ?ʥե??????ɤ? ??Ǽ???????ͤ??׻????뤿???˻??Ѥ????ޤ???

??Ϣ????

as(1), gdb(1), ld(1), objdump(1), execve(2), core(5) Hewlett Packard, Elf-64 Object File Format. Santa Cruz Operation, System V Application Binary Interface. Unix System Laboratories, Object Files, Executable and Linking Format (ELF).

????

ELF ?إå??ե??????ϡ? FreeBSD 2.2.6 ???о줷?ޤ????? ELF ???Ȥϡ??ǽ??? AT&T System V UNIX ???о줷?ޤ????? ELF ?ե????ޥåȤϡ?ɸ???Ȥ??ƺ??Ѥ????Ƥ??ޤ???

????

???Υޥ˥奢???ڡ????ϡ?BSDi ?? BSD/OS elf(5) ?Υޥ˥奢???ڡ????˿?ȯ?????ơ? Jeroen Ruigrok van der Werven ⟨asmodai@FreeBSD.org⟩ ???񤭤ޤ?????