mirror of
https://gitlab.com/freepascal.org/fpc/source.git
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686 lines
20 KiB
ObjectPascal
686 lines
20 KiB
ObjectPascal
{
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Copyright (c) 1998-2006 by Peter Vreman
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Contains ELF definitions
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit elfbase;
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{$i fpcdefs.inc}
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interface
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const
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EI_MAG0 = 0;
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ELFMAG0 = $7F;
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EI_MAG1 = 1;
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ELFMAG1 = ord('E');
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EI_MAG2 = 2;
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ELFMAG2 = ord('L');
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EI_MAG3 = 3;
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ELFMAG3 = ord('F');
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EI_CLASS = 4;
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ELFCLASSNONE = 0;
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ELFCLASS32 = 1;
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ELFCLASS64 = 2;
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EI_DATA = 5;
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ELFDATANONE = 0;
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ELFDATA2LSB = 1;
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ELFDATA2MSB = 2;
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EI_VERSION = 6;
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EI_OSABI = 7;
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ELFOSABI_NONE = 0; { UNIX System V ABI }
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ELFOSABI_HPUX = 1; { HP-UX operating system }
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ELFOSABI_NETBSD = 2; { NetBSD }
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ELFOSABI_LINUX = 3; { GNU/Linux }
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ELFOSABI_HURD = 4; { GNU/Hurd }
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ELFOSABI_SOLARIS = 6; { Solaris }
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ELFOSABI_AIX = 7; { AIX }
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ELFOSABI_IRIX = 8; { IRIX }
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ELFOSABI_FREEBSD = 9; { FreeBSD }
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ELFOSABI_TRU64 = 10; { TRU64 UNIX }
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ELFOSABI_MODESTO = 11; { Novell Modesto }
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ELFOSABI_OPENBSD = 12; { OpenBSD }
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ELFOSABI_OPENVMS = 13; { OpenVMS }
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ELFOSABI_NSK = 14; { Hewlett-Packard Non-Stop Kernel }
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ELFOSABI_AROS = 15; { AROS }
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ELFOSABI_FENIXOS = 16; { FenixOS }
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ELFOSABI_C6000_ELFABI = 64; { Bare-metal TMS320C6000 }
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ELFOSABI_C6000_LINUX = 65; { Linux TMS320C6000 }
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ELFOSABI_ARM = 97; { ARM }
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ELFOSABI_STANDALONE = 255; { Standalone (embedded) application }
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EI_ABIVERSION = 8;
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EI_PAD = 9;
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{ ELFHeader.e_type }
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ET_NONE = 0;
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ET_REL = 1;
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ET_EXEC = 2;
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ET_DYN = 3;
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ET_CORE = 4;
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{ ELFHeader.e_machine }
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EM_SPARC = 2;
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EM_386 = 3;
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EM_M68K = 4;
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EM_MIPS = 8;
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EM_PPC = 20;
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EM_ARM = 40;
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EM_X86_64 = 62;
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{ ElfSechdr.sh_num }
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SHN_UNDEF = 0;
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SHN_LORESERVE = $FF00;
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SHN_ABS = $fff1;
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SHN_COMMON = $fff2;
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{ ElfSechdr.sh_type }
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SHT_NULL = 0;
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SHT_PROGBITS = 1;
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SHT_SYMTAB = 2;
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SHT_STRTAB = 3;
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SHT_RELA = 4;
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SHT_HASH = 5;
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SHT_DYNAMIC = 6;
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SHT_NOTE = 7;
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SHT_NOBITS = 8;
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SHT_REL = 9;
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SHT_SHLIB = 10;
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SHT_DYNSYM = 11;
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SHT_INIT_ARRAY = 14;
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SHT_FINI_ARRAY = 15;
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SHT_PREINIT_ARRAY = 16;
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SHT_GROUP = 17;
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SHT_SYMTAB_SHNDX = 18;
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SHT_GNU_ATTRIBUTES = $6ffffff5;
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SHT_GNU_HASH = $6ffffff6;
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SHT_GNU_LIBLIST = $6ffffff7;
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SHT_GNU_verdef = $6ffffffd;
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SHT_GNU_verneed = $6ffffffe;
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SHT_GNU_versym = $6fffffff;
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{ ElfSechdr.sh_flags }
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SHF_WRITE = 1;
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SHF_ALLOC = 2;
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SHF_EXECINSTR = 4;
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SHF_MERGE = 16;
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SHF_STRINGS = 32;
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SHF_INFO_LINK = 64;
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SHF_LINK_ORDER = 128;
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SHF_OS_NONCONFORMING = 256;
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SHF_GROUP = 512;
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SHF_TLS = 1024;
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STB_LOCAL = 0;
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STB_GLOBAL = 1;
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STB_WEAK = 2;
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STT_NOTYPE = 0;
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STT_OBJECT = 1;
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STT_FUNC = 2;
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STT_SECTION = 3;
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STT_FILE = 4;
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STT_COMMON = 5;
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STT_TLS = 6;
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STT_GNU_IFUNC = 10;
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{ program header types }
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PT_NULL = 0;
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PT_LOAD = 1;
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PT_DYNAMIC = 2;
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PT_INTERP = 3;
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PT_NOTE = 4;
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PT_SHLIB = 5;
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PT_PHDR = 6;
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PT_TLS = 7;
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PT_LOOS = $60000000;
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PT_HIOS = $6FFFFFFF;
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PT_LOPROC = $70000000;
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PT_HIPROC = $7FFFFFFF;
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PT_GNU_EH_FRAME = PT_LOOS + $474e550; { Frame unwind information }
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PT_GNU_STACK = PT_LOOS + $474e551; { Stack flags }
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PT_GNU_RELRO = PT_LOOS + $474e552; { Read-only after relocation }
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{ program header flags }
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PF_X = 1;
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PF_W = 2;
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PF_R = 4;
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PF_MASKOS = $0FF00000; { OS-specific reserved bits }
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PF_MASKPROC = $F0000000; { Processor-specific reserved bits }
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{ .dynamic tags }
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DT_NULL = 0;
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DT_NEEDED = 1;
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DT_PLTRELSZ = 2;
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DT_PLTGOT = 3;
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DT_HASH = 4;
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DT_STRTAB = 5;
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DT_SYMTAB = 6;
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DT_RELA = 7;
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DT_RELASZ = 8;
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DT_RELAENT = 9;
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DT_STRSZ = 10;
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DT_SYMENT = 11;
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DT_INIT = 12;
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DT_FINI = 13;
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DT_SONAME = 14;
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DT_RPATH = 15;
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DT_SYMBOLIC = 16;
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DT_REL = 17;
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DT_RELSZ = 18;
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DT_RELENT = 19;
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DT_PLTREL = 20;
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DT_DEBUG = 21;
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DT_TEXTREL = 22;
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DT_JMPREL = 23;
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DT_BIND_NOW = 24;
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DT_INIT_ARRAY = 25;
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DT_FINI_ARRAY = 26;
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DT_INIT_ARRAYSZ = 27;
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DT_FINI_ARRAYSZ = 28;
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DT_RUNPATH = 29;
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DT_FLAGS = 30;
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DT_ENCODING = 32;
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DT_PREINIT_ARRAY = 32;
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DT_PREINIT_ARRAYSZ = 33;
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DT_NUM = 34;
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DT_LOOS = $6000000D;
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DT_HIOS = $6ffff000;
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DT_LOPROC = $70000000;
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DT_HIPROC = $7fffffff;
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DT_RELACOUNT = $6ffffff9;
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DT_RELCOUNT = $6ffffffa;
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DT_FLAGS_1 = $6ffffffb;
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DT_VERDEF = $6ffffffc;
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DT_VERDEFNUM = $6ffffffd;
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DT_VERNEED = $6ffffffe;
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DT_VERNEEDNUM = $6fffffff;
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{ GNU extension to Solaris versioning scheme }
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DT_VERSYM = $6ffffff0;
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GRP_COMDAT = 1;
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{ DT_FLAGS }
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DF_ORIGIN = 1;
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DF_SYMBOLIC = 2; // supersedes DT_SYMBOLIC
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DF_TEXTREL = 4; // supersedes DT_TEXTREL
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DF_BIND_NOW = 8; // supersedes DT_BIND_NOW
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DF_STATIC_TLS = 16;
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{ DT_FLAGS_1 }
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DF_1_NOW = $01;
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DF_1_GLOBAL = $02;
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DF_1_GROUP = $04;
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DF_1_NODELETE = $08;
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DF_1_LOADFLTR = $10;
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DF_1_INITFIRST = $20;
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DF_1_NOOPEN = $40;
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DF_1_ORIGIN = $80;
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DF_1_DIRECT = $100;
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DF_1_TRANS = $200;
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DF_1_INTERPOSE = $400;
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DF_1_NODEFLIB = $800;
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DF_1_NODUMP = $1000;
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DF_1_CONFALT = $2000;
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type
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TElfIdent = array[0..15] of byte;
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{ Structures which are written directly to the output file }
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TElf32header=record
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e_ident : TElfIdent;
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e_type : word;
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e_machine : word;
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e_version : longword;
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e_entry : longword; { entrypoint }
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e_phoff : longword; { program header offset }
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e_shoff : longword; { sections header offset }
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e_flags : longword;
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e_ehsize : word; { elf header size in bytes }
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e_phentsize : word; { size of an entry in the program header array }
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e_phnum : word; { 0..e_phnum-1 of entrys }
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e_shentsize : word; { size of an entry in sections header array }
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e_shnum : word; { 0..e_shnum-1 of entrys }
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e_shstrndx : word; { index of string section header }
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end;
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TElf32sechdr=record
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sh_name : longword;
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sh_type : longword;
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sh_flags : longword;
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sh_addr : longword;
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sh_offset : longword;
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sh_size : longword;
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sh_link : longword;
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sh_info : longword;
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sh_addralign : longword;
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sh_entsize : longword;
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end;
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TElf32proghdr=record
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p_type : longword;
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p_offset : longword;
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p_vaddr : longword;
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p_paddr : longword;
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p_filesz : longword;
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p_memsz : longword;
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p_flags : longword;
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p_align : longword;
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end;
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TElf32reloc=record
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address : longword;
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info : longword; { bit 0-7: type, 8-31: symbol }
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addend : longint;
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end;
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TElf32symbol=record
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st_name : longword;
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st_value : longword;
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st_size : longword;
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st_info : byte; { bit 0-3: type, 4-7: bind }
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st_other : byte;
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st_shndx : word;
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end;
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TElf32Dyn=record
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d_tag: longword;
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case integer of
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0: (d_val: longword);
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1: (d_ptr: longword);
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end;
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telf64header=record
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e_ident : TElfIdent;
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e_type : word;
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e_machine : word;
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e_version : longword;
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e_entry : qword; { entrypoint }
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e_phoff : qword; { program header offset }
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e_shoff : qword; { sections header offset }
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e_flags : longword;
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e_ehsize : word; { elf header size in bytes }
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e_phentsize : word; { size of an entry in the program header array }
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e_phnum : word; { 0..e_phnum-1 of entrys }
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e_shentsize : word; { size of an entry in sections header array }
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e_shnum : word; { 0..e_shnum-1 of entrys }
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e_shstrndx : word; { index of string section header }
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end;
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TElf64sechdr=record
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sh_name : longword;
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sh_type : longword;
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sh_flags : qword;
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sh_addr : qword;
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sh_offset : qword;
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sh_size : qword;
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sh_link : longword;
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sh_info : longword;
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sh_addralign : qword;
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sh_entsize : qword;
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end;
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telf64proghdr=record
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p_type : longword;
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p_flags : longword;
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p_offset : qword;
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p_vaddr : qword;
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p_paddr : qword;
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p_filesz : qword;
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p_memsz : qword;
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p_align : qword;
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end;
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telf64reloc=record
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address : qword;
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info : qword; { bit 0-31: type, 32-63: symbol }
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addend : int64; { signed! }
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end;
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telf64symbol=record
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st_name : longword;
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st_info : byte; { bit 0-3: type, 4-7: bind }
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st_other : byte;
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st_shndx : word;
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st_value : qword;
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st_size : qword;
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end;
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TElf64Dyn=record
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d_tag: qword;
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case integer of
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0: (d_val: qword);
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1: (d_ptr: qword);
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end;
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{ The following records are same for 32 and 64 bit ELF files }
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TElfVerdef=record
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vd_version: word; { =VER_DEF_CURRENT }
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vd_flags: word;
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vd_ndx: word;
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vd_cnt: word; { number of verdaux records }
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vd_hash: longword; { ELF hash of version name }
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vd_aux: longword; { offset to verdaux records }
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vd_next: longword; { offset to next verdef record }
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end;
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TElfVerdaux=record
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vda_name: longword;
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vda_next: longword;
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end;
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TElfVerneed=record
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vn_version: word; { =VER_NEED_CURRENT }
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vn_cnt: word;
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vn_file: longword;
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vn_aux: longword;
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vn_next: longword;
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end;
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TElfVernaux=record
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vna_hash: longword;
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vna_flags: word;
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vna_other: word;
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vna_name: longword;
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vna_next: longword;
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end;
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const
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VERSYM_VERSION = $7FFF;
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VERSYM_HIDDEN = $8000;
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VER_NDX_LOCAL = 0;
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VER_NDX_GLOBAL = 1;
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{ TElfverdef.vd_version }
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VER_DEF_CURRENT = 1;
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{ TElfverneed.vn_version }
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VER_NEED_CURRENT = 1;
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{ TElfverdef.vn_flags }
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VER_FLG_BASE = 1;
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VER_FLG_WEAK = 2;
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VER_FLG_INFO = 4;
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procedure MayBeSwapHeader(var h : telf32header);
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procedure MayBeSwapHeader(var h : telf64header);
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procedure MayBeSwapHeader(var h : telf32proghdr);
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procedure MayBeSwapHeader(var h : telf64proghdr);
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procedure MaybeSwapSecHeader(var h : telf32sechdr);
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procedure MaybeSwapSecHeader(var h : telf64sechdr);
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procedure MaybeSwapElfSymbol(var h : telf32symbol);
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procedure MaybeSwapElfSymbol(var h : telf64symbol);
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procedure MaybeSwapElfReloc(var h : telf32reloc);
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procedure MaybeSwapElfReloc(var h : telf64reloc);
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procedure MaybeSwapElfDyn(var h : telf32dyn);
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procedure MaybeSwapElfDyn(var h : telf64dyn);
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procedure MaybeSwapElfverdef(var h: TElfverdef);
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procedure MaybeSwapElfverdaux(var h: TElfverdaux);
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procedure MaybeSwapElfverneed(var h: TElfverneed);
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procedure MaybeSwapElfvernaux(var h: TElfvernaux);
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implementation
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uses
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systems;
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procedure MayBeSwapHeader(var h : telf32header);
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begin
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if source_info.endian<>target_info.endian then
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with h do
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begin
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e_type:=swapendian(e_type);
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e_machine:=swapendian(e_machine);
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e_version:=swapendian(e_version);
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e_entry:=swapendian(e_entry);
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e_phoff:=swapendian(e_phoff);
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e_shoff:=swapendian(e_shoff);
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e_flags:=swapendian(e_flags);
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e_ehsize:=swapendian(e_ehsize);
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e_phentsize:=swapendian(e_phentsize);
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e_phnum:=swapendian(e_phnum);
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e_shentsize:=swapendian(e_shentsize);
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e_shnum:=swapendian(e_shnum);
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e_shstrndx:=swapendian(e_shstrndx);
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end;
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end;
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procedure MayBeSwapHeader(var h : telf64header);
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begin
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if source_info.endian<>target_info.endian then
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with h do
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begin
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e_type:=swapendian(e_type);
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e_machine:=swapendian(e_machine);
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e_version:=swapendian(e_version);
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e_entry:=swapendian(e_entry);
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e_phoff:=swapendian(e_phoff);
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e_shoff:=swapendian(e_shoff);
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e_flags:=swapendian(e_flags);
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e_ehsize:=swapendian(e_ehsize);
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e_phentsize:=swapendian(e_phentsize);
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e_phnum:=swapendian(e_phnum);
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e_shentsize:=swapendian(e_shentsize);
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e_shnum:=swapendian(e_shnum);
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e_shstrndx:=swapendian(e_shstrndx);
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end;
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end;
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procedure MayBeSwapHeader(var h : telf32proghdr);
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begin
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if source_info.endian<>target_info.endian then
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with h do
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begin
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p_align:=swapendian(p_align);
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p_filesz:=swapendian(p_filesz);
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p_flags:=swapendian(p_flags);
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p_memsz:=swapendian(p_memsz);
|
|
p_offset:=swapendian(p_offset);
|
|
p_paddr:=swapendian(p_paddr);
|
|
p_type:=swapendian(p_type);
|
|
p_vaddr:=swapendian(p_vaddr);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MayBeSwapHeader(var h : telf64proghdr);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
p_align:=swapendian(p_align);
|
|
p_filesz:=swapendian(p_filesz);
|
|
p_flags:=swapendian(p_flags);
|
|
p_memsz:=swapendian(p_memsz);
|
|
p_offset:=swapendian(p_offset);
|
|
p_paddr:=swapendian(p_paddr);
|
|
p_type:=swapendian(p_type);
|
|
p_vaddr:=swapendian(p_vaddr);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapSecHeader(var h : telf32sechdr);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
sh_name:=swapendian(sh_name);
|
|
sh_type:=swapendian(sh_type);
|
|
sh_flags:=swapendian(sh_flags);
|
|
sh_addr:=swapendian(sh_addr);
|
|
sh_offset:=swapendian(sh_offset);
|
|
sh_size:=swapendian(sh_size);
|
|
sh_link:=swapendian(sh_link);
|
|
sh_info:=swapendian(sh_info);
|
|
sh_addralign:=swapendian(sh_addralign);
|
|
sh_entsize:=swapendian(sh_entsize);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapSecHeader(var h : telf64sechdr);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
sh_name:=swapendian(sh_name);
|
|
sh_type:=swapendian(sh_type);
|
|
sh_flags:=swapendian(sh_flags);
|
|
sh_addr:=swapendian(sh_addr);
|
|
sh_offset:=swapendian(sh_offset);
|
|
sh_size:=swapendian(sh_size);
|
|
sh_link:=swapendian(sh_link);
|
|
sh_info:=swapendian(sh_info);
|
|
sh_addralign:=swapendian(sh_addralign);
|
|
sh_entsize:=swapendian(sh_entsize);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapElfSymbol(var h : telf32symbol);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
st_name:=swapendian(st_name);
|
|
st_value:=swapendian(st_value);
|
|
st_size:=swapendian(st_size);
|
|
st_shndx:=swapendian(st_shndx);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapElfSymbol(var h : telf64symbol);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
st_name:=swapendian(st_name);
|
|
st_value:=swapendian(st_value);
|
|
st_size:=swapendian(st_size);
|
|
st_shndx:=swapendian(st_shndx);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapElfReloc(var h : telf32reloc);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
address:=swapendian(address);
|
|
info:=swapendian(info);
|
|
addend:=swapendian(addend);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapElfReloc(var h : telf64reloc);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
address:=swapendian(address);
|
|
info:=swapendian(info);
|
|
addend:=swapendian(addend);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapElfDyn(var h : telf32dyn);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
d_tag:=swapendian(d_tag);
|
|
d_val:=swapendian(d_val);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapElfDyn(var h : telf64dyn);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
d_tag:=swapendian(d_tag);
|
|
d_val:=swapendian(d_val);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapElfverdef(var h: TElfverdef);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
vd_version:=swapendian(vd_version);
|
|
vd_flags:=swapendian(vd_flags);
|
|
vd_ndx:=swapendian(vd_ndx);
|
|
vd_cnt:=swapendian(vd_cnt);
|
|
vd_hash:=swapendian(vd_hash);
|
|
vd_aux:=swapendian(vd_aux);
|
|
vd_next:=swapendian(vd_next);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapElfverdaux(var h: TElfverdaux);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
vda_name:=swapendian(vda_name);
|
|
vda_next:=swapendian(vda_next);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapElfverneed(var h: TElfverneed);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
vn_version:=swapendian(vn_version);
|
|
vn_cnt:=swapendian(vn_cnt);
|
|
vn_file:=swapendian(vn_file);
|
|
vn_aux:=swapendian(vn_aux);
|
|
vn_next:=swapendian(vn_next);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure MaybeSwapElfvernaux(var h: TElfvernaux);
|
|
begin
|
|
if source_info.endian<>target_info.endian then
|
|
with h do
|
|
begin
|
|
vna_hash:=swapendian(vna_hash);
|
|
vna_flags:=swapendian(vna_flags);
|
|
vna_other:=swapendian(vna_other);
|
|
vna_name:=swapendian(vna_name);
|
|
vna_next:=swapendian(vna_next);
|
|
end;
|
|
end;
|
|
|
|
end.
|