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// Copyright (c) 2020 Johannes Stoelp
#pragma once
#include <stdint.h>
/// --------------
/// Program Header
/// --------------
#define PT_NULL 0 /* ignored */
#define PT_LOAD 1 /* Mark loadable segment (allowed p_memsz > p_filesz). */
#define PT_DYNAMIC 2 /* Location of .dynamic section */
#define PT_INTERP 3 /* Location of .interp section */
#define PT_NOTE 4 /* Location of auxiliary information */
#define PT_SHLIB 5 /* Reserved, but unspecified semantic */
#define PT_PHDR 6 /* Location & size of program headers itself */
#define PT_GNU_EH_FRAME 0x6474e550 /* [x86-64] stack unwinding tables */
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7fffffff
#define PF_X 0x1 /* Phdr flag eXecute flag bitmask */
#define PF_W 0x2 /* Phdr flag Write flag bitmask */
#define PF_R 0x4 /* Phdr flag Read flag bitmask */
typedef struct {
uint32_t type; // Segment kind.
uint32_t flags; // Flags describing Segment attributes like R, W, X.
uint64_t offset; // Offset into the file where the Segment starts.
uint64_t vaddr; // Virtual address of first byte of Segment in memory.
uint64_t paddr; // Physical address, ignored in our case.
uint64_t filesz; // Number of bytes of the Segment in the file image.
uint64_t memsz; // Number of bytes of the segement in memory.
uint64_t align;
} Elf64Phdr;
/// ---------------
/// Dynamic Section
/// ---------------
#define DT_NULL 0 /* [ignored] Marks end of dynamic section */
#define DT_NEEDED 1 /* [val] Name of needed library */
#define DT_PLTRELSZ 2 /* [val] Size in bytes of PLT relocs */
#define DT_PLTGOT 3 /* [ptr] Processor defined value */
#define DT_HASH 4 /* [ptr] Address of symbol hash table */
#define DT_STRTAB 5 /* [ptr] Address of string table */
#define DT_SYMTAB 6 /* [ptr] Address of symbol table */
#define DT_RELA 7 /* [ptr] Address of Rela relocs */
#define DT_RELASZ 8 /* [val] Total size of Rela relocs */
#define DT_RELAENT 9 /* [val] Size of one Rela reloc */
#define DT_STRSZ 10 /* [val] Size of string table */
#define DT_SYMENT 11 /* [val] Size of one symbol table entry */
#define DT_INIT 12 /* [ptr] Address of init function */
#define DT_FINI 13 /* [ptr] Address of termination function */
#define DT_SONAME 14 /* [val] Name of shared object */
#define DT_RPATH 15 /* [val] Library search path (deprecated) */
#define DT_SYMBOLIC 16 /* [ignored] Start symbol search here */
#define DT_REL 17 /* [ptr] Address of Rel relocs */
#define DT_RELSZ 18 /* [val] Total size of Rel relocs */
#define DT_RELENT 19 /* [val] Size of one Rel reloc */
#define DT_PLTREL 20 /* [val] Type of reloc in PLT */
#define DT_DEBUG 21 /* [ptr] For debugging; unspecified */
#define DT_TEXTREL 22 /* [ignored] Reloc might modify .text */
#define DT_JMPREL 23 /* [ptr] Address of PLT relocs */
#define DT_BIND_NOW 24 /* [ignored] Process relocations of object */
#define DT_MAX_CNT 25
typedef struct {
uint64_t tag;
union {
uint64_t val;
void* ptr;
};
} Elf64Dyn;
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