9ec0f03a0d
Add support for PT_GNU_RELRO. This allows the static linker to indicate that certain regions of memory should be marked as "read-only" after dynamic linking is complete. See: * http://www.akkadia.org/drepper/nonselsec.pdf (section 6) * http://tk-blog.blogspot.com/2009/02/relro-not-so-well-known-memory.html Note that this change has no effect on Android right now, because we don't compile our code with relro enabled. Change-Id: I6541f8775367e8558b4388f7d105b1ae6e8f046b
136 lines
5.7 KiB
C
136 lines
5.7 KiB
C
/* $OpenBSD: exec_elf.h,v 1.41 2006/01/06 18:53:05 millert Exp $ */
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/*
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* Copyright (c) 1995, 1996 Erik Theisen. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This is the ELF ABI header file
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* formerly known as "elf_abi.h".
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*/
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#ifndef _SYS_EXEC_ELF_H_
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#define _SYS_EXEC_ELF_H_
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#include <machine/_types.h>
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#include <machine/exec.h>
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#include <linux/elf.h>
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/* e_ident[] Operating System/ABI */
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#define ELFOSABI_SYSV 0 /* UNIX System V ABI */
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#define ELFOSABI_HPUX 1 /* HP-UX operating system */
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#define ELFOSABI_NETBSD 2 /* NetBSD */
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#define ELFOSABI_LINUX 3 /* GNU/Linux */
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#define ELFOSABI_HURD 4 /* GNU/Hurd */
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#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */
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#define ELFOSABI_SOLARIS 6 /* Solaris */
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#define ELFOSABI_MONTEREY 7 /* Monterey */
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#define ELFOSABI_IRIX 8 /* IRIX */
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#define ELFOSABI_FREEBSD 9 /* FreeBSD */
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#define ELFOSABI_TRU64 10 /* TRU64 UNIX */
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#define ELFOSABI_MODESTO 11 /* Novell Modesto */
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#define ELFOSABI_OPENBSD 12 /* OpenBSD */
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#define ELFOSABI_ARM 97 /* ARM */
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#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
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/* e_ident */
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#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
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(ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
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(ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
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(ehdr).e_ident[EI_MAG3] == ELFMAG3)
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/* e_machine */
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#define EM_NONE 0 /* No Machine */
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#define EM_M32 1 /* AT&T WE 32100 */
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#define EM_SPARC 2 /* SPARC */
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#define EM_386 3 /* Intel 80386 */
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#define EM_68K 4 /* Motorola 68000 */
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#define EM_88K 5 /* Motorola 88000 */
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#define EM_486 6 /* Intel 80486 - unused? */
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#define EM_860 7 /* Intel 80860 */
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#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */
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/*
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* Don't know if EM_MIPS_RS4_BE,
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* EM_SPARC64, EM_PARISC,
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* or EM_PPC are ABI compliant
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*/
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#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */
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#define EM_SPARC64 11 /* SPARC v9 64-bit unoffical */
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#define EM_PARISC 15 /* HPPA */
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#define EM_SPARC32PLUS 18 /* Enhanced instruction set SPARC */
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#define EM_PPC 20 /* PowerPC */
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#define EM_ARM 40 /* Advanced RISC Machines ARM */
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#define EM_ALPHA 41 /* DEC ALPHA */
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#define EM_SPARCV9 43 /* SPARC version 9 */
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#define EM_ALPHA_EXP 0x9026 /* DEC ALPHA */
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#define EM_AMD64 62 /* AMD64 architecture */
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#define EM_VAX 75 /* DEC VAX */
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#define EM_NUM 15 /* number of machine types */
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/* Section names */
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#define ELF_BSS ".bss" /* uninitialized data */
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#define ELF_DATA ".data" /* initialized data */
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#define ELF_DEBUG ".debug" /* debug */
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#define ELF_DYNAMIC ".dynamic" /* dynamic linking information */
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#define ELF_DYNSTR ".dynstr" /* dynamic string table */
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#define ELF_DYNSYM ".dynsym" /* dynamic symbol table */
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#define ELF_FINI ".fini" /* termination code */
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#define ELF_GOT ".got" /* global offset table */
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#define ELF_HASH ".hash" /* symbol hash table */
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#define ELF_INIT ".init" /* initialization code */
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#define ELF_REL_DATA ".rel.data" /* relocation data */
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#define ELF_REL_FINI ".rel.fini" /* relocation termination code */
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#define ELF_REL_INIT ".rel.init" /* relocation initialization code */
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#define ELF_REL_DYN ".rel.dyn" /* relocaltion dynamic link info */
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#define ELF_REL_RODATA ".rel.rodata" /* relocation read-only data */
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#define ELF_REL_TEXT ".rel.text" /* relocation code */
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#define ELF_RODATA ".rodata" /* read-only data */
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#define ELF_SHSTRTAB ".shstrtab" /* section header string table */
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#define ELF_STRTAB ".strtab" /* string table */
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#define ELF_SYMTAB ".symtab" /* symbol table */
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#define ELF_TEXT ".text" /* code */
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/* Symbol Binding - ELF32_ST_BIND - st_info */
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#define STB_LOCAL 0 /* Local symbol */
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#define STB_GLOBAL 1 /* Global symbol */
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#define STB_WEAK 2 /* like global - lower precedence */
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#define STB_NUM 3 /* number of symbol bindings */
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#define STB_LOPROC 13 /* reserved range for processor */
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#define STB_HIPROC 15 /* specific symbol bindings */
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/* Symbol type - ELF32_ST_TYPE - st_info */
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#define STT_NOTYPE 0 /* not specified */
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#define STT_OBJECT 1 /* data object */
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#define STT_FUNC 2 /* function */
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#define STT_SECTION 3 /* section */
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#define STT_FILE 4 /* file */
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#define STT_NUM 5 /* number of symbol types */
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#define STT_LOPROC 13 /* reserved range for processor */
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#define STT_HIPROC 15 /* specific symbol types */
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#define PT_GNU_RELRO 0x6474e552 /* Read-only post relocation */
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#endif /* _SYS_EXEC_ELF_H_ */
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