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aos/include/elf/elf.h
Daniel Schwyn 6d444bf552 Main handout 
Signed-off-by: Daniel Schwyn <daniel.schwyn@inf.ethz.ch>
2022-03-03 14:57:51 +01:00

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/** \file
* \brief ELF file format definitions
*/
/*
* Copyright (c) 2007-2010, ETH Zurich.
* Copyright (c) 2015, Hewlett Packard Enterprise Development LP.
* All rights reserved.
*
* This file is distributed under the terms in the attached LICENSE file.
* If you do not find this file, copies can be found by writing to:
* ETH Zurich D-INFK, Universitaetstrasse 6, CH-8092 Zurich. Attn: Systems Group.
*/
/*-
* Copyright (c) 1998 John D. Polstra.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/sys/sys/elf_common.h,v 1.23 2007/12/02 00:05:18 jb Exp $
*/
#ifndef ELF_H
#define ELF_H
#include <sys/cdefs.h>
__BEGIN_DECLS
/* Indexes into the e_ident array. Keep synced with
http://www.sco.com/developers/gabi/latest/ch4.eheader.html */
#define EI_MAG0 0 /* Magic number, byte 0. */
#define EI_MAG1 1 /* Magic number, byte 1. */
#define EI_MAG2 2 /* Magic number, byte 2. */
#define EI_MAG3 3 /* Magic number, byte 3. */
#define EI_CLASS 4 /* Class of machine. */
#define EI_DATA 5 /* Data format. */
#define EI_VERSION 6 /* ELF format version. */
#define EI_OSABI 7 /* Operating system / ABI identification */
#define EI_ABIVERSION 8 /* ABI version */
#define OLD_EI_BRAND 8 /* Start of architecture identification. */
#define EI_PAD 9 /* Start of padding (per SVR4 ABI). */
#define EI_NIDENT 16 /* Size of e_ident array. */
/* Values for the magic number bytes. */
#define ELFMAG0 0x7f
#define ELFMAG1 'E'
#define ELFMAG2 'L'
#define ELFMAG3 'F'
#define ELFMAG "\177ELF" /* magic string */
#define SELFMAG 4 /* magic string size */
/* Values for e_ident[EI_VERSION] and e_version. */
#define EV_NONE 0
#define EV_CURRENT 1
/* Values for e_ident[EI_CLASS]. */
#define ELFCLASSNONE 0 /* Unknown class. */
#define ELFCLASS32 1 /* 32-bit architecture. */
#define ELFCLASS64 2 /* 64-bit architecture. */
/* Values for e_ident[EI_DATA]. */
#define ELFDATANONE 0 /* Unknown data format. */
#define ELFDATA2LSB 1 /* 2's complement little-endian. */
#define ELFDATA2MSB 2 /* 2's complement big-endian. */
/* Values for e_ident[EI_OSABI]. */
#define ELFOSABI_NONE 0 /* UNIX System V ABI */
#define ELFOSABI_HPUX 1 /* HP-UX operating system */
#define ELFOSABI_NETBSD 2 /* NetBSD */
#define ELFOSABI_LINUX 3 /* GNU/Linux */
#define ELFOSABI_HURD 4 /* GNU/Hurd */
#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */
#define ELFOSABI_SOLARIS 6 /* Solaris */
#define ELFOSABI_AIX 7 /* AIX */
#define ELFOSABI_IRIX 8 /* IRIX */
#define ELFOSABI_FREEBSD 9 /* FreeBSD */
#define ELFOSABI_TRU64 10 /* TRU64 UNIX */
#define ELFOSABI_MODESTO 11 /* Novell Modesto */
#define ELFOSABI_OPENBSD 12 /* OpenBSD */
#define ELFOSABI_OPENVMS 13 /* Open VMS */
#define ELFOSABI_NSK 14 /* HP Non-Stop Kernel */
#define ELFOSABI_ARM 97 /* ARM */
#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
#define ELFOSABI_SYSV ELFOSABI_NONE /* symbol used in old spec */
#define ELFOSABI_MONTEREY ELFOSABI_AIX /* Monterey */
/* e_ident */
#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
(ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
(ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
(ehdr).e_ident[EI_MAG3] == ELFMAG3)
/* Values for e_type. */
#define ET_NONE 0 /* Unknown type. */
#define ET_REL 1 /* Relocatable. */
#define ET_EXEC 2 /* Executable. */
#define ET_DYN 3 /* Shared object. */
#define ET_CORE 4 /* Core file. */
#define ET_LOOS 0xfe00 /* First operating system specific. */
#define ET_HIOS 0xfeff /* Last operating system-specific. */
#define ET_LOPROC 0xff00 /* First processor-specific. */
#define ET_HIPROC 0xffff /* Last processor-specific. */
/* Values for e_machine. */
#define EM_NONE 0 /* Unknown machine. */
#define EM_M32 1 /* AT&T WE32100. */
#define EM_SPARC 2 /* Sun SPARC. */
#define EM_386 3 /* Intel i386. */
#define EM_68K 4 /* Motorola 68000. */
#define EM_88K 5 /* Motorola 88000. */
#define EM_860 7 /* Intel i860. */
#define EM_MIPS 8 /* MIPS R3000 Big-Endian only. */
#define EM_S370 9 /* IBM System/370. */
#define EM_MIPS_RS3_LE 10 /* MIPS R3000 Little-Endian. */
#define EM_PARISC 15 /* HP PA-RISC. */
#define EM_VPP500 17 /* Fujitsu VPP500. */
#define EM_SPARC32PLUS 18 /* SPARC v8plus. */
#define EM_960 19 /* Intel 80960. */
#define EM_PPC 20 /* PowerPC 32-bit. */
#define EM_PPC64 21 /* PowerPC 64-bit. */
#define EM_S390 22 /* IBM System/390. */
#define EM_V800 36 /* NEC V800. */
#define EM_FR20 37 /* Fujitsu FR20. */
#define EM_RH32 38 /* TRW RH-32. */
#define EM_RCE 39 /* Motorola RCE. */
#define EM_ARM 40 /* ARM. */
#define EM_SH 42 /* Hitachi SH. */
#define EM_SPARCV9 43 /* SPARC v9 64-bit. */
#define EM_TRICORE 44 /* Siemens TriCore embedded processor. */
#define EM_ARC 45 /* Argonaut RISC Core. */
#define EM_H8_300 46 /* Hitachi H8/300. */
#define EM_H8_300H 47 /* Hitachi H8/300H. */
#define EM_H8S 48 /* Hitachi H8S. */
#define EM_H8_500 49 /* Hitachi H8/500. */
#define EM_IA_64 50 /* Intel IA-64 Processor. */
#define EM_MIPS_X 51 /* Stanford MIPS-X. */
#define EM_COLDFIRE 52 /* Motorola ColdFire. */
#define EM_68HC12 53 /* Motorola M68HC12. */
#define EM_MMA 54 /* Fujitsu MMA. */
#define EM_PCP 55 /* Siemens PCP. */
#define EM_NCPU 56 /* Sony nCPU. */
#define EM_NDR1 57 /* Denso NDR1 microprocessor. */
#define EM_STARCORE 58 /* Motorola Star*Core processor. */
#define EM_ME16 59 /* Toyota ME16 processor. */
#define EM_ST100 60 /* STMicroelectronics ST100 processor. */
#define EM_TINYJ 61 /* Advanced Logic Corp. TinyJ processor. */
#define EM_X86_64 62 /* Advanced Micro Devices x86-64 */
#define EM_AMD64 EM_X86_64 /* Advanced Micro Devices x86-64 (compat) */
#define EM_K1OM 181 /* Intel K1OM (Xeon Phi) */
#define EM_AARCH64 183 /* ARM 64 bit */
/* Non-standard or deprecated. */
#define EM_486 6 /* Intel i486. */
#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */
#define EM_ALPHA_STD 41 /* Digital Alpha (standard value). */
#define EM_ALPHA 0x9026 /* Alpha (written in the absence of an ABI) */
/* Special section indexes. */
#define SHN_UNDEF 0 /* Undefined, missing, irrelevant. */
#define SHN_LORESERVE 0xff00 /* First of reserved range. */
#define SHN_LOPROC 0xff00 /* First processor-specific. */
#define SHN_HIPROC 0xff1f /* Last processor-specific. */
#define SHN_LOOS 0xff20 /* First operating system-specific. */
#define SHN_HIOS 0xff3f /* Last operating system-specific. */
#define SHN_ABS 0xfff1 /* Absolute values. */
#define SHN_COMMON 0xfff2 /* Common data. */
#define SHN_XINDEX 0xffff /* Escape -- index stored elsewhere. */
#define SHN_HIRESERVE 0xffff /* Last of reserved range. */
/* sh_type */
#define SHT_NULL 0 /* inactive */
#define SHT_PROGBITS 1 /* program defined information */
#define SHT_SYMTAB 2 /* symbol table section */
#define SHT_STRTAB 3 /* string table section */
#define SHT_RELA 4 /* relocation section with addends */
#define SHT_HASH 5 /* symbol hash table section */
#define SHT_DYNAMIC 6 /* dynamic section */
#define SHT_NOTE 7 /* note section */
#define SHT_NOBITS 8 /* no space section */
#define SHT_REL 9 /* relocation section - no addends */
#define SHT_SHLIB 10 /* reserved - purpose unknown */
#define SHT_DYNSYM 11 /* dynamic symbol table section */
#define SHT_INIT_ARRAY 14 /* Initialization function pointers. */
#define SHT_FINI_ARRAY 15 /* Termination function pointers. */
#define SHT_PREINIT_ARRAY 16 /* Pre-initialization function ptrs. */
#define SHT_GROUP 17 /* Section group. */
#define SHT_SYMTAB_SHNDX 18 /* Section indexes (see SHN_XINDEX). */
#define SHT_LOOS 0x60000000 /* First of OS specific semantics */
#define SHT_HIOS 0x6fffffff /* Last of OS specific semantics */
#define SHT_LOPROC 0x70000000 /* reserved range for processor */
#define SHT_AMD64_UNWIND 0x70000001 /* unwind information */
#define SHT_HIPROC 0x7fffffff /* specific section header types */
#define SHT_LOUSER 0x80000000 /* reserved range for application */
#define SHT_HIUSER 0xffffffff /* specific indexes */
/* Flags for sh_flags. */
#define SHF_WRITE 0x1 /* Section contains writable data. */
#define SHF_ALLOC 0x2 /* Section occupies memory. */
#define SHF_EXECINSTR 0x4 /* Section contains instructions. */
#define SHF_MERGE 0x10 /* Section may be merged. */
#define SHF_STRINGS 0x20 /* Section contains strings. */
#define SHF_INFO_LINK 0x40 /* sh_info holds section index. */
#define SHF_LINK_ORDER 0x80 /* Special ordering requirements. */
#define SHF_OS_NONCONFORMING 0x100 /* OS-specific processing required. */
#define SHF_GROUP 0x200 /* Member of section group. */
#define SHF_TLS 0x400 /* Section contains TLS data. */
#define SHF_MASKOS 0x0ff00000 /* OS-specific semantics. */
#define SHF_MASKPROC 0xf0000000 /* Processor-specific semantics. */
/* Values for p_type. */
#define PT_NULL 0 /* Unused entry. */
#define PT_LOAD 1 /* Loadable segment. */
#define PT_DYNAMIC 2 /* Dynamic linking information segment. */
#define PT_INTERP 3 /* Pathname of interpreter. */
#define PT_NOTE 4 /* Auxiliary information. */
#define PT_SHLIB 5 /* Reserved (not used). */
#define PT_PHDR 6 /* Location of program header itself. */
#define PT_TLS 7 /* Thread local storage segment */
#define PT_LOOS 0x60000000 /* First OS-specific. */
#define PT_BF_RELOC PT_LOOS /* Barrelfish relocatable segment. */
#define PT_SUNW_UNWIND 0x6464e550 /* amd64 UNWIND program header */
#define PT_GNU_EH_FRAME 0x6474e550
#define PT_LOSUNW 0x6ffffffa
#define PT_SUNWBSS 0x6ffffffa /* Sun Specific segment */
#define PT_SUNWSTACK 0x6ffffffb /* describes the stack segment */
#define PT_SUNWDTRACE 0x6ffffffc /* private */
#define PT_SUNWCAP 0x6ffffffd /* hard/soft capabilities segment */
#define PT_HISUNW 0x6fffffff
#define PT_HIOS 0x6fffffff /* Last OS-specific. */
#define PT_LOPROC 0x70000000 /* First processor-specific type. */
#define PT_HIPROC 0x7fffffff /* Last processor-specific type. */
/* Values for p_flags. */
#define PF_X 0x1 /* Executable. */
#define PF_W 0x2 /* Writable. */
#define PF_R 0x4 /* Readable. */
#define PF_MASKOS 0x0ff00000 /* Operating system-specific. */
#define PF_MASKPROC 0xf0000000 /* Processor-specific. */
/* Extended program header index. */
#define PN_XNUM 0xffff
/* Values for d_tag. */
#define DT_NULL 0 /* Terminating entry. */
#define DT_NEEDED 1 /* String table offset of a needed shared
library. */
#define DT_PLTRELSZ 2 /* Total size in bytes of PLT relocations. */
#define DT_PLTGOT 3 /* Processor-dependent address. */
#define DT_HASH 4 /* Address of symbol hash table. */
#define DT_STRTAB 5 /* Address of string table. */
#define DT_SYMTAB 6 /* Address of symbol table. */
#define DT_RELA 7 /* Address of ElfNN_Rela relocations. */
#define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */
#define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */
#define DT_STRSZ 10 /* Size of string table. */
#define DT_SYMENT 11 /* Size of each symbol table entry. */
#define DT_INIT 12 /* Address of initialization function. */
#define DT_FINI 13 /* Address of finalization function. */
#define DT_SONAME 14 /* String table offset of shared object
name. */
#define DT_RPATH 15 /* String table offset of library path. [sup] */
#define DT_SYMBOLIC 16 /* Indicates "symbolic" linking. [sup] */
#define DT_REL 17 /* Address of ElfNN_Rel relocations. */
#define DT_RELSZ 18 /* Total size of ElfNN_Rel relocations. */
#define DT_RELENT 19 /* Size of each ElfNN_Rel relocation. */
#define DT_PLTREL 20 /* Type of relocation used for PLT. */
#define DT_DEBUG 21 /* Reserved (not used). */
#define DT_TEXTREL 22 /* Indicates there may be relocations in
non-writable segments. [sup] */
#define DT_JMPREL 23 /* Address of PLT relocations. */
#define DT_BIND_NOW 24 /* [sup] */
#define DT_INIT_ARRAY 25 /* Address of the array of pointers to
initialization functions */
#define DT_FINI_ARRAY 26 /* Address of the array of pointers to
termination functions */
#define DT_INIT_ARRAYSZ 27 /* Size in bytes of the array of
initialization functions. */
#define DT_FINI_ARRAYSZ 28 /* Size in bytes of the array of
terminationfunctions. */
#define DT_RUNPATH 29 /* String table offset of a null-terminated
library search path string. */
#define DT_FLAGS 30 /* Object specific flag values. */
#define DT_ENCODING 32 /* Values greater than or equal to DT_ENCODING
and less than DT_LOOS follow the rules for
the interpretation of the d_un union
as follows: even == 'd_ptr', even == 'd_val'
or none */
#define DT_PREINIT_ARRAY 32 /* Address of the array of pointers to
pre-initialization functions. */
#define DT_PREINIT_ARRAYSZ 33 /* Size in bytes of the array of
pre-initialization functions. */
#define DT_MAXPOSTAGS 34 /* number of positive tags */
#define DT_LOOS 0x6000000d /* First OS-specific */
#define DT_SUNW_AUXILIARY 0x6000000d /* symbol auxiliary name */
#define DT_SUNW_RTLDINF 0x6000000e /* ld.so.1 info (private) */
#define DT_SUNW_FILTER 0x6000000f /* symbol filter name */
#define DT_SUNW_CAP 0x60000010 /* hardware/software */
#define DT_HIOS 0x6ffff000 /* Last OS-specific */
/*
* DT_* entries which fall between DT_VALRNGHI & DT_VALRNGLO use the
* Dyn.d_un.d_val field of the Elf*_Dyn structure.
*/
#define DT_VALRNGLO 0x6ffffd00
#define DT_CHECKSUM 0x6ffffdf8 /* elf checksum */
#define DT_PLTPADSZ 0x6ffffdf9 /* pltpadding size */
#define DT_MOVEENT 0x6ffffdfa /* move table entry size */
#define DT_MOVESZ 0x6ffffdfb /* move table size */
#define DT_FEATURE_1 0x6ffffdfc /* feature holder */
#define DT_POSFLAG_1 0x6ffffdfd /* flags for DT_* entries, effecting */
/* the following DT_* entry. */
/* See DF_P1_* definitions */
#define DT_SYMINSZ 0x6ffffdfe /* syminfo table size (in bytes) */
#define DT_SYMINENT 0x6ffffdff /* syminfo entry size (in bytes) */
#define DT_VALRNGHI 0x6ffffdff
/*
* DT_* entries which fall between DT_ADDRRNGHI & DT_ADDRRNGLO use the
* Dyn.d_un.d_ptr field of the Elf*_Dyn structure.
*
* If any adjustment is made to the ELF object after it has been
* built, these entries will need to be adjusted.
*/
#define DT_ADDRRNGLO 0x6ffffe00
#define DT_CONFIG 0x6ffffefa /* configuration information */
#define DT_DEPAUDIT 0x6ffffefb /* dependency auditing */
#define DT_AUDIT 0x6ffffefc /* object auditing */
#define DT_PLTPAD 0x6ffffefd /* pltpadding (sparcv9) */
#define DT_MOVETAB 0x6ffffefe /* move table */
#define DT_SYMINFO 0x6ffffeff /* syminfo table */
#define DT_ADDRRNGHI 0x6ffffeff
#define DT_VERSYM 0x6ffffff0 /* Address of versym section. */
#define DT_RELACOUNT 0x6ffffff9 /* number of RELATIVE relocations */
#define DT_RELCOUNT 0x6ffffffa /* number of RELATIVE relocations */
#define DT_FLAGS_1 0x6ffffffb /* state flags - see DF_1_* defs */
#define DT_VERDEF 0x6ffffffc /* Address of verdef section. */
#define DT_VERDEFNUM 0x6ffffffd /* Number of elems in verdef section */
#define DT_VERNEED 0x6ffffffe /* Address of verneed section. */
#define DT_VERNEEDNUM 0x6fffffff /* Number of elems in verneed section */
#define DT_LOPROC 0x70000000 /* First processor-specific type. */
#define DT_DEPRECATED_SPARC_REGISTER 0x7000001
#define DT_AUXILIARY 0x7ffffffd /* shared library auxiliary name */
#define DT_USED 0x7ffffffe /* ignored - same as needed */
#define DT_FILTER 0x7fffffff /* shared library filter name */
#define DT_HIPROC 0x7fffffff /* Last processor-specific type. */
/* Values for DT_FLAGS */
#define DF_ORIGIN 0x0001 /* Indicates that the object being loaded may
make reference to the $ORIGIN substitution
string */
#define DF_SYMBOLIC 0x0002 /* Indicates "symbolic" linking. */
#define DF_TEXTREL 0x0004 /* Indicates there may be relocations in
non-writable segments. */
#define DF_BIND_NOW 0x0008 /* Indicates that the dynamic linker should
process all relocations for the object
containing this entry before transferring
control to the program. */
#define DF_STATIC_TLS 0x0010 /* Indicates that the shared object or
executable contains code using a static
thread-local storage scheme. */
/* Values for n_type. Used in core files. */
#define NT_PRSTATUS 1 /* Process status. */
#define NT_FPREGSET 2 /* Floating point registers. */
#define NT_PRPSINFO 3 /* Process state info. */
/* Symbol Binding - ELFNN_ST_BIND - st_info */
#define STB_LOCAL 0 /* Local symbol */
#define STB_GLOBAL 1 /* Global symbol */
#define STB_WEAK 2 /* like global - lower precedence */
#define STB_LOOS 10 /* Reserved range for operating system */
#define STB_HIOS 12 /* specific semantics. */
#define STB_LOPROC 13 /* reserved range for processor */
#define STB_HIPROC 15 /* specific semantics. */
/* Symbol type - ELFNN_ST_TYPE - st_info */
#define STT_NOTYPE 0 /* Unspecified type. */
#define STT_OBJECT 1 /* Data object. */
#define STT_FUNC 2 /* Function. */
#define STT_SECTION 3 /* Section. */
#define STT_FILE 4 /* Source file. */
#define STT_COMMON 5 /* Uninitialized common block. */
#define STT_TLS 6 /* TLS object. */
#define STT_NUM 7
#define STT_LOOS 10 /* Reserved range for operating system */
#define STT_HIOS 12 /* specific semantics. */
#define STT_LOPROC 13 /* reserved range for processor */
#define STT_HIPROC 15 /* specific semantics. */
/* Symbol visibility - ELFNN_ST_VISIBILITY - st_other */
#define STV_DEFAULT 0x0 /* Default visibility (see binding). */
#define STV_INTERNAL 0x1 /* Special meaning in relocatable objects. */
#define STV_HIDDEN 0x2 /* Not visible. */
#define STV_PROTECTED 0x3 /* Visible but not preemptible. */
/* Special symbol table indexes. */
#define STN_UNDEF 0 /* Undefined symbol index. */
/* Symbol versioning flags. */
#define VER_DEF_CURRENT 1
#define VER_DEF_IDX(x) VER_NDX(x)
#define VER_FLG_BASE 0x01
#define VER_FLG_WEAK 0x02
#define VER_NEED_CURRENT 1
#define VER_NEED_WEAK (1u << 15)
#define VER_NEED_HIDDEN VER_NDX_HIDDEN
#define VER_NEED_IDX(x) VER_NDX(x)
#define VER_NDX_LOCAL 0
#define VER_NDX_GLOBAL 1
#define VER_NDX_GIVEN 2
#define VER_NDX_HIDDEN (1u << 15)
#define VER_NDX(x) ((x) & ~(1u << 15))
#define CA_SUNW_NULL 0
#define CA_SUNW_HW_1 1 /* first hardware capabilities entry */
#define CA_SUNW_SF_1 2 /* first software capabilities entry */
/*
* Syminfo flag values
*/
#define SYMINFO_FLG_DIRECT 0x0001 /* symbol ref has direct association */
/* to object containing defn. */
#define SYMINFO_FLG_PASSTHRU 0x0002 /* ignored - see SYMINFO_FLG_FILTER */
#define SYMINFO_FLG_COPY 0x0004 /* symbol is a copy-reloc */
#define SYMINFO_FLG_LAZYLOAD 0x0008 /* object containing defn should be */
/* lazily-loaded */
#define SYMINFO_FLG_DIRECTBIND 0x0010 /* ref should be bound directly to */
/* object containing defn. */
#define SYMINFO_FLG_NOEXTDIRECT 0x0020 /* don't let an external reference */
/* directly bind to this symbol */
#define SYMINFO_FLG_FILTER 0x0002 /* symbol ref is associated to a */
#define SYMINFO_FLG_AUXILIARY 0x0040 /* standard or auxiliary filter */
/*
* Syminfo.si_boundto values.
*/
#define SYMINFO_BT_SELF 0xffff /* symbol bound to self */
#define SYMINFO_BT_PARENT 0xfffe /* symbol bound to parent */
#define SYMINFO_BT_NONE 0xfffd /* no special symbol binding */
#define SYMINFO_BT_EXTERN 0xfffc /* symbol defined as external */
#define SYMINFO_BT_LOWRESERVE 0xff00 /* beginning of reserved entries */
/*
* Syminfo version values.
*/
#define SYMINFO_NONE 0 /* Syminfo version */
#define SYMINFO_CURRENT 1
#define SYMINFO_NUM 2
#define ELF64_R_SYM(i) ((i) >> 32)
#define ELF64_R_TYPE(i) ((i) & 0xffffffffL)
#define ELF32_R_SYM(i) ((i)>>8)
#define ELF32_R_TYPE(i) ((uint8_t)(i))
#define ELF32_R_INFO(s,t) (((s)<<8)+(uint8_t)(t))
/* AMD x86-64 relocations. */
#define R_X86_64_NONE 0 /* No relocation. */
#define R_X86_64_64 1 /* Add 64 bit symbol value. */
#define R_X86_64_PC32 2 /* PC-relative 32 bit signed sym value. */
#define R_X86_64_GOT32 3 /* PC-relative 32 bit GOT offset. */
#define R_X86_64_PLT32 4 /* PC-relative 32 bit PLT offset. */
#define R_X86_64_COPY 5 /* Copy data from shared object. */
#define R_X86_64_GLOB_DAT 6 /* Set GOT entry to data address. */
#define R_X86_64_JMP_SLOT 7 /* Set GOT entry to code address. */
#define R_X86_64_RELATIVE 8 /* Add load address of shared object. */
#define R_X86_64_GOTPCREL 9 /* Add 32 bit signed pcrel offset to GOT. */
#define R_X86_64_32 10 /* Add 32 bit zero extended symbol value */
#define R_X86_64_32S 11 /* Add 32 bit sign extended symbol value */
#define R_X86_64_16 12 /* Add 16 bit zero extended symbol value */
#define R_X86_64_PC16 13 /* Add 16 bit signed extended pc relative symbol value */
#define R_X86_64_8 14 /* Add 8 bit zero extended symbol value */
#define R_X86_64_PC8 15 /* Add 8 bit signed extended pc relative symbol value */
#define R_X86_64_DTPMOD64 16 /* ID of module containing symbol */
#define R_X86_64_DTPOFF64 17 /* Offset in TLS block */
#define R_X86_64_TPOFF64 18 /* Offset in static TLS block */
#define R_X86_64_TLSGD 19 /* PC relative offset to GD GOT entry */
#define R_X86_64_TLSLD 20 /* PC relative offset to LD GOT entry */
#define R_X86_64_DTPOFF32 21 /* Offset in TLS block */
#define R_X86_64_GOTTPOFF 22 /* PC relative offset to IE GOT entry */
#define R_X86_64_TPOFF32 23 /* Offset in static TLS block */
/* i386 relocations. */
#define R_386_NONE 0 /* No relocation. */
#define R_386_32 1 /* Add symbol value. */
#define R_386_PC32 2 /* Add PC-relative symbol value. */
#define R_386_GOT32 3 /* Add PC-relative GOT offset. */
#define R_386_PLT32 4 /* Add PC-relative PLT offset. */
#define R_386_COPY 5 /* Copy data from shared object. */
#define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */
#define R_386_JMP_SLOT 7 /* Set GOT entry to code address. */
#define R_386_RELATIVE 8 /* Add load address of shared object. */
#define R_386_GOTOFF 9 /* Add GOT-relative symbol address. */
#define R_386_GOTPC 10 /* Add PC-relative GOT table address. */
#define R_386_TLS_TPOFF 14 /* Negative offset in static TLS block */
#define R_386_TLS_IE 15 /* Absolute address of GOT for -ve static TLS */
#define R_386_TLS_GOTIE 16 /* GOT entry for negative static TLS block */
#define R_386_TLS_LE 17 /* Negative offset relative to static TLS */
#define R_386_TLS_GD 18 /* 32 bit offset to GOT (index,off) pair */
#define R_386_TLS_LDM 19 /* 32 bit offset to GOT (index,zero) pair */
#define R_386_TLS_GD_32 24 /* 32 bit offset to GOT (index,off) pair */
#define R_386_TLS_GD_PUSH 25 /* pushl instruction for Sun ABI GD sequence */
#define R_386_TLS_GD_CALL 26 /* call instruction for Sun ABI GD sequence */
#define R_386_TLS_GD_POP 27 /* popl instruction for Sun ABI GD sequence */
#define R_386_TLS_LDM_32 28 /* 32 bit offset to GOT (index,zero) pair */
#define R_386_TLS_LDM_PUSH 29 /* pushl instruction for Sun ABI LD sequence */
#define R_386_TLS_LDM_CALL 30 /* call instruction for Sun ABI LD sequence */
#define R_386_TLS_LDM_POP 31 /* popl instruction for Sun ABI LD sequence */
#define R_386_TLS_LDO_32 32 /* 32 bit offset from start of TLS block */
#define R_386_TLS_IE_32 33 /* 32 bit offset to GOT static TLS offset entry */
#define R_386_TLS_LE_32 34 /* 32 bit offset within static TLS block */
#define R_386_TLS_DTPMOD32 35 /* GOT entry containing TLS index */
#define R_386_TLS_DTPOFF32 36 /* GOT entry containing TLS offset */
#define R_386_TLS_TPOFF32 37 /* GOT entry of -ve static TLS offset */
/* ARM relocations. A LOT MISSING! */
#define R_ARM_NONE 0
#define R_ARM_ABS32 2
#define R_ARM_RELATIVE 23
/* AARCH64 relocations. A LOT MISSING! */
#define R_AARCH64_NONE 0
#define R_AARCH64_ABS64 257
#define R_AARCH64_RELATIVE 1027
/**
* \brief ELF64 file header.
*/
struct Elf64_Ehdr {
uint8_t e_ident[EI_NIDENT];
uint16_t e_type;
uint16_t e_machine;
uint32_t e_version;
uint64_t e_entry;
uint64_t e_phoff;
uint64_t e_shoff;
uint32_t e_flags;
uint16_t e_ehsize;
uint16_t e_phentsize;
uint16_t e_phnum;
uint16_t e_shentsize;
uint16_t e_shnum;
uint16_t e_shstrndx;
} __attribute__ ((packed));
/**
* \brief ELF64 program header.
*/
struct Elf64_Phdr {
uint32_t p_type;
uint32_t p_flags;
uint64_t p_offset;
uint64_t p_vaddr;
uint64_t p_paddr;
uint64_t p_filesz;
uint64_t p_memsz;
uint64_t p_align;
} __attribute__ ((packed));
/**
* \brief ELF64 section header.
*/
struct Elf64_Shdr {
uint32_t sh_name;
uint32_t sh_type;
uint64_t sh_flags;
uint64_t sh_addr;
uint64_t sh_offset;
uint64_t sh_size;
uint32_t sh_link;
uint32_t sh_info;
uint64_t sh_addralign;
uint64_t sh_entsize;
} __attribute__ ((packed));
/**
* \brief ELF64 relocation entry.
*/
struct Elf64_Rela {
uint64_t r_offset;
uint64_t r_info;
int64_t r_addend;
} __attribute__ ((packed));
struct Elf64_Rel {
uint64_t r_offset;
uint64_t r_info;
} __attribute__ ((packed));
/**
* \brief ELF64 symbol table entry.
*/
struct Elf64_Sym {
uint32_t st_name;
uint8_t st_info;
uint8_t st_other;
uint16_t st_shndx;
uint64_t st_value;
uint64_t st_size;
} __attribute__ ((packed));
/**
* \brief ELF64 Dynamic section entry
*/
struct Elf64_Dyn {
int64_t d_tag;
union {
uint64_t d_val;
uint64_t d_ptr;
} d_un;
} __attribute__ ((packed));
/**
* \brief ELF32 file header.
*/
struct Elf32_Ehdr {
uint8_t e_ident[EI_NIDENT]; // 00
uint16_t e_type; // 16
uint16_t e_machine; // 18
uint32_t e_version; // 20
uint32_t e_entry; // 24
uint32_t e_phoff; // 28
uint32_t e_shoff; // 32
uint32_t e_flags; // 36
uint16_t e_ehsize; // 40
uint16_t e_phentsize; // 42
uint16_t e_phnum; // 44
uint16_t e_shentsize; // 46
uint16_t e_shnum; // 48
uint16_t e_shstrndx; // 50
};
/**
* \brief ELF32 program header.
*/
struct Elf32_Phdr {
uint32_t p_type; // 0
uint32_t p_offset; // 4
uint32_t p_vaddr; // 8
uint32_t p_paddr; // 12
uint32_t p_filesz; // 16
uint32_t p_memsz; // 20
uint32_t p_flags; // 24
uint32_t p_align; // 28
};
/**
* \brief ELF32 section header.
*/
struct Elf32_Shdr {
uint32_t sh_name; // 0
uint32_t sh_type; // 4
uint32_t sh_flags; // 8
uint32_t sh_addr; // 12
uint32_t sh_offset; // 16
uint32_t sh_size; // 20
uint32_t sh_link; // 24
uint32_t sh_info; // 28
uint32_t sh_addralign; // 32
uint32_t sh_entsize; // 36
};
/**
* \brief ELF32 relocation entry.
*/
struct Elf32_Rel {
uint32_t r_offset;
uint32_t r_info;
};
/**
* \brief ELF32 relocation entry with addend.
*/
struct Elf32_Rela {
uint32_t r_offset;
uint32_t r_info;
int32_t r_addend;
};
/**
* \brief ELF32 symbol table entry.
*/
struct Elf32_Sym {
uint32_t st_name;
uint32_t st_value;
uint32_t st_size;
uint8_t st_info;
uint8_t st_other;
uint16_t st_shndx;
};
struct Elf32_Dyn {
int32_t d_tag;
union {
uint32_t d_val;
uint32_t d_ptr;
} d_un;
} __attribute__ ((packed));
/**
* \brief ELF32 note entry
*/
struct Elf32_Nhdr {
uint32_t n_namesz;
uint32_t n_descsz;
uint32_t n_type;
};
/* A GNU build id (SHA-1 hash). */
#define NT_GNU_BUILD_ID 3
struct Elf64_Shdr *
elf64_find_section_header_type(struct Elf64_Shdr *shdr,
uint32_t entries, uint32_t type);
struct Elf32_Shdr *
elf32_find_section_header_type(struct Elf32_Shdr *shdr,
uint32_t entries, uint32_t type);
struct Elf64_Shdr *
elf64_find_section_header_name(genvaddr_t elf_base, size_t elf_bytes,
const char* section_name);
struct Elf32_Shdr *
elf32_find_section_header_name(genvaddr_t elf_base, size_t elf_bytes,
const char* section_name);
struct Elf64_Shdr *
elf64_find_symtab(genvaddr_t elf_base, size_t elf_bytes);
struct Elf32_Shdr *
elf32_find_symtab(genvaddr_t elf_base, size_t elf_bytes);
struct Elf64_Sym *
elf64_find_symbol_by_name(genvaddr_t elf_base, size_t elf_bytes,
const char *name, uint8_t contains, uint8_t type,
uintptr_t *index);
struct Elf32_Sym *
elf32_find_symbol_by_name(genvaddr_t elf_base, size_t elf_bytes,
const char *name,
uint8_t contains, uint8_t type,
uintptr_t *index);
uint32_t
elf64_count_symbol_by_name(genvaddr_t elf_base, size_t elf_bytes,
const char *name, uint8_t contains, uint8_t type,
size_t *ret_bytes);
uint32_t
elf32_count_symbol_by_name(genvaddr_t elf_base, size_t elf_bytes,
const char *name, uint8_t contains, uint8_t type,
size_t *ret_bytes);
struct Elf64_Sym *
elf64_find_symbol_by_addr(genvaddr_t elf_base, size_t elf_bytes,
lvaddr_t addr, uintptr_t *index);
struct Elf32_Sym *
elf32_find_symbol_by_addr(genvaddr_t elf_base, size_t elf_bytes,
lvaddr_t addr, uintptr_t *index);
const char *
elf64_get_symbolname(struct Elf64_Ehdr *head, struct Elf64_Sym *sym);
const char *
elf32_get_symbolname(struct Elf32_Ehdr *head, struct Elf32_Sym *sym);
void elf64_relocate(genvaddr_t dst, genvaddr_t src,
struct Elf64_Rela * rela, size_t size,
struct Elf64_Sym * symtab, size_t symsize,
genvaddr_t start, void *vbase);
void elf32_relocate(genvaddr_t dst, genvaddr_t src,
struct Elf32_Rel * rela, size_t size,
struct Elf32_Sym * symtab, size_t symsize,
genvaddr_t start, void *vbase);
typedef errval_t (*elf_allocator_fn)(void *state, genvaddr_t base,
size_t size, uint32_t flags, void **ret);
errval_t elf64_load(uint16_t em_machine, elf_allocator_fn allocate_func,
void *state, lvaddr_t base, size_t size,
genvaddr_t *retentry,
genvaddr_t *ret_tlsbase, size_t *ret_tlsinitlen,
size_t *ret_tlstotallen);
errval_t elf32_load(uint16_t em_machine, elf_allocator_fn allocate_func,
void *state, lvaddr_t base,
size_t size, genvaddr_t *retentry,
genvaddr_t *ret_tlsbase, size_t *ret_tlsinitlen,
size_t *ret_tlstotallen);
errval_t elf_load(uint16_t em_machine, elf_allocator_fn allocate_func,
void *state, lvaddr_t base,
size_t size, genvaddr_t *retentry);
errval_t elf_load_tls(uint16_t em_machine, elf_allocator_fn allocate_func,
void *state, lvaddr_t base,
size_t size, genvaddr_t *retentry,
genvaddr_t *ret_tlsbase, size_t *ret_tlsinitlen,
size_t *ret_tlstotallen);
size_t elf_virtual_size(lvaddr_t base);
errval_t elf_get_eh_info(lvaddr_t elfbase, size_t elfsize,
lvaddr_t *eh_frame, size_t *eh_frame_size,
lvaddr_t *eh_frame_hdr, size_t *eh_frame_hdr_size);
genvaddr_t elf_virtual_base32(struct Elf32_Ehdr *ehead);
genvaddr_t elf_virtual_base64(struct Elf64_Ehdr *ehead);
genvaddr_t elf_virtual_base(lvaddr_t base);
__END_DECLS
#endif // ELF_H
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