From 05f740db6fe966d32256d4ed3b897f7b3e051fff Mon Sep 17 00:00:00 2001 From: johannst Date: Sun, 25 Apr 2021 23:38:36 +0200 Subject: added support for R_X86_64_64/R_X86_64_RELATIVE relocations + added init/fini --- lib/include/elf.h | 64 ++++++++++++++++++++++++++++++------------------------- 1 file changed, 35 insertions(+), 29 deletions(-) (limited to 'lib') diff --git a/lib/include/elf.h b/lib/include/elf.h index f0a0940..7a2e597 100644 --- a/lib/include/elf.h +++ b/lib/include/elf.h @@ -84,32 +84,36 @@ typedef struct { /// 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 +#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_INIT_ARRAY 25 /* [ptr] Address of array of initialization functions */ +#define DT_FINI_ARRAY 26 /* [ptr] Address of array of termination functions */ +#define DT_INIT_ARRAYSZ 27 /* [val] Size in bytes of the initialization array */ +#define DT_FINI_ARRAYSZ 28 /* [val] Size in bytes of the termination array */ +#define DT_MAX_CNT 29 typedef struct { uint64_t tag; @@ -167,6 +171,8 @@ typedef struct { #define ELF64_R_TYPE(i) ((i)&0xffffffffL) // x86_64 relocation types. -#define R_X86_64_COPY 5 /* Copy content from sym addr to relocation address */ -#define R_X86_64_GLOB_DAT 6 /* Address affected by relocation: `offset` (+ base) */ -#define R_X86_64_JUMP_SLOT 7 /* Address affected by relocation: `offset` (+ base) */ +#define R_X86_64_64 1 /* Absolute 64bit address, address affected by relocation: `base + offset` */ +#define R_X86_64_COPY 5 /* Copy content from sym addr to relocation address: `base + offset` */ +#define R_X86_64_GLOB_DAT 6 /* Address affected by relocation: `base + offset` */ +#define R_X86_64_JUMP_SLOT 7 /* Address affected by relocation: `base + offset` */ +#define R_X86_64_RELATIVE 8 /* Relative address *`base + offset` = `base + addend` */ -- cgit v1.2.3