From ef6a411ce8ff615d65e2be105834c2fdbe557de1 Mon Sep 17 00:00:00 2001 From: johannst Date: Sat, 20 Mar 2021 02:34:01 +0100 Subject: Split common headers in header/src files. --- lib/include/elf.h | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 lib/include/elf.h (limited to 'lib/include/elf.h') diff --git a/lib/include/elf.h b/lib/include/elf.h new file mode 100644 index 0000000..a0fe6f7 --- /dev/null +++ b/lib/include/elf.h @@ -0,0 +1,75 @@ +// Copyright (c) 2020 Johannes Stoelp + +#pragma once + +#include + +/// -------------- +/// 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; -- cgit v1.2.3