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Dynamic ELF stub
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Alex
136
include/elf.h
136
include/elf.h
@ -133,6 +133,26 @@ typedef struct elf64_sym
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Elf64_Xword st_size; /* Associated symbol size */
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} Elf64_Sym;
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struct Elf32_Dyn
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{
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Elf32_Sword d_tag; /* Type of dynamic table entry. */
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union
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{
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Elf32_Word d_val; /* Integer value of entry. */
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Elf32_Addr d_ptr; /* Pointer value of entry. */
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} d_un;
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};
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struct Elf64_Dyn
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{
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Elf64_Sxword d_tag; /* Type of dynamic table entry. */
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union
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{
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Elf64_Xword d_val; /* Integer value of entry. */
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Elf64_Addr d_ptr; /* Pointer value of entry. */
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} d_un;
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};
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enum Elf_Ident
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{
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EI_MAG0 = 0, // 0x7F
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@ -248,50 +268,78 @@ enum SegmentTypes
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PT_HIPROC = 0x7fffffff
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};
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#define DT_NULL 0 /* Marks end of dynamic section */
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#define DT_NEEDED 1 /* Name of needed library */
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#define DT_PLTRELSZ 2 /* Size in bytes of PLT relocs */
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#define DT_PLTGOT 3 /* Processor defined value */
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#define DT_HASH 4 /* Address of symbol hash table */
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#define DT_STRTAB 5 /* Address of string table */
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#define DT_SYMTAB 6 /* Address of symbol table */
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#define DT_RELA 7 /* Address of Rela relocs */
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#define DT_RELASZ 8 /* Total size of Rela relocs */
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#define DT_RELAENT 9 /* Size of one Rela reloc */
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#define DT_STRSZ 10 /* Size of string table */
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#define DT_SYMENT 11 /* Size of one symbol table entry */
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#define DT_INIT 12 /* Address of init function */
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#define DT_FINI 13 /* Address of termination function */
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#define DT_SONAME 14 /* Name of shared object */
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#define DT_RPATH 15 /* Library search path (deprecated) */
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#define DT_SYMBOLIC 16 /* Start symbol search here */
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#define DT_REL 17 /* Address of Rel relocs */
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#define DT_RELSZ 18 /* Total size of Rel relocs */
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#define DT_RELENT 19 /* Size of one Rel reloc */
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#define DT_PLTREL 20 /* Type of reloc in PLT */
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#define DT_DEBUG 21 /* For debugging; unspecified */
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#define DT_TEXTREL 22 /* Reloc might modify .text */
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#define DT_JMPREL 23 /* Address of PLT relocs */
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#define DT_BIND_NOW 24 /* Process relocations of object */
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#define DT_INIT_ARRAY 25 /* Array with addresses of init fct */
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#define DT_FINI_ARRAY 26 /* Array with addresses of fini fct */
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#define DT_INIT_ARRAYSZ 27 /* Size in bytes of DT_INIT_ARRAY */
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#define DT_FINI_ARRAYSZ 28 /* Size in bytes of DT_FINI_ARRAY */
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#define DT_RUNPATH 29 /* Library search path */
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#define DT_FLAGS 30 /* Flags for the object being loaded */
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#define DT_ENCODING 32 /* Start of encoded range */
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#define DT_PREINIT_ARRAY 32 /* Array with addresses of preinit fct*/
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#define DT_PREINIT_ARRAYSZ 33 /* size in bytes of DT_PREINIT_ARRAY */
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#define DT_SYMTAB_SHNDX 34 /* Address of SYMTAB_SHNDX section */
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#define DT_RELRSZ 35 /* Total size of RELR relative relocations */
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#define DT_RELR 36 /* Address of RELR relative relocations */
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#define DT_RELRENT 37 /* Size of one RELR relative relocaction */
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#define DT_NUM 38 /* Number used */
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#define DT_LOOS 0x6000000d /* Start of OS-specific */
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#define DT_HIOS 0x6ffff000 /* End of OS-specific */
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#define DT_LOPROC 0x70000000 /* Start of processor-specific */
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#define DT_HIPROC 0x7fffffff /* End of processor-specific */
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#define DT_PROCNUM DT_MIPS_NUM /* Most used by any processor */
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/* https://docs.oracle.com/cd/E19683-01/817-3677/chapter6-42444/index.html */
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enum DynamicArrayTags
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{
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DT_NULL = 0,
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DT_NEEDED = 1,
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DT_PLTRELSZ = 2,
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DT_PLTGOT = 3,
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DT_HASH = 4,
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DT_STRTAB = 5,
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DT_SYMTAB = 6,
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DT_RELA = 7,
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DT_RELASZ = 8,
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DT_RELAENT = 9,
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DT_STRSZ = 10,
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DT_SYMENT = 11,
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DT_INIT = 12,
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DT_FINI = 13,
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DT_SONAME = 14,
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DT_RPATH = 15,
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DT_SYMBOLIC = 16,
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DT_REL = 17,
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DT_RELSZ = 18,
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DT_RELENT = 19,
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DT_PLTREL = 20,
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DT_DEBUG = 21,
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DT_TEXTREL = 22,
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DT_JMPREL = 23,
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DT_BIND_NOW = 24,
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DT_INIT_ARRAY = 25,
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DT_FINI_ARRAY = 26,
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DT_INIT_ARRAYSZ = 27,
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DT_FINI_ARRAYSZ = 28,
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DT_RUNPATH = 29,
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DT_FLAGS = 30,
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DT_ENCODING = 32,
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DT_PREINIT_ARRAY = 32,
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DT_PREINIT_ARRAYSZ = 33,
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DT_LOOS = 0x6000000d,
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DT_SUNW_RTLDINF = 0x6000000e,
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DT_HIOS = 0x6ffff000,
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DT_VALRNGLO = 0x6ffffd00,
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DT_CHECKSUM = 0x6ffffdf8,
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DT_PLTPADSZ = 0x6ffffdf9,
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DT_MOVEENT = 0x6ffffdfa,
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DT_MOVESZ = 0x6ffffdfb,
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DT_FEATURE_1 = 0x6ffffdfc,
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DT_POSFLAG_1 = 0x6ffffdfd,
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DT_SYMINSZ = 0x6ffffdfe,
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DT_SYMINENT = 0x6ffffdff,
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DT_VALRNGHI = 0x6ffffdff,
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DT_ADDRRNGLO = 0x6ffffe00,
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DT_CONFIG = 0x6ffffefa,
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DT_DEPAUDIT = 0x6ffffefb,
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DT_AUDIT = 0x6ffffefc,
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DT_PLTPAD = 0x6ffffefd,
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DT_MOVETAB = 0x6ffffefe,
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DT_SYMINFO = 0x6ffffeff,
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DT_ADDRRNGHI = 0x6ffffeff,
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DT_RELACOUNT = 0x6ffffff9,
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DT_RELCOUNT = 0x6ffffffa,
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DT_FLAGS_1 = 0x6ffffffb,
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DT_VERDEF = 0x6ffffffc,
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DT_VERDEFNUM = 0x6ffffffd,
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DT_VERNEED = 0x6ffffffe,
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DT_VERNEEDNUM = 0x6fffffff,
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DT_LOPROC = 0x70000000,
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DT_SPARC_REGISTER = 0x70000001,
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DT_AUXILIARY = 0x7ffffffd,
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DT_USED = 0x7ffffffe,
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DT_FILTER = 0x7fffffff,
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DT_HIPROC = 0x7fffffff
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};
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// used for Elf64_Sym st_info
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#define ELF32_ST_BIND(info) ((info) >> 4)
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