| /* |
| * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2018, Red Hat Inc. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.tools.jaotc.binformat.elf; |
| |
| /** |
| * |
| * Support for the creation of Elf Object files. Current support is limited to 64 bit x86_64. |
| * |
| */ |
| |
| final class Elf { |
| //@formatter:off |
| /** |
| * Elf64_Ehdr structure defines |
| */ |
| enum Elf64_Ehdr { |
| e_ident( 0,16), |
| e_type(16, 2), |
| e_machine(18, 2), |
| e_version(20, 4), |
| e_entry(24, 8), |
| e_phoff(32, 8), |
| e_shoff(40, 8), |
| e_flags(48, 4), |
| e_ehsize(52, 2), |
| e_phentsize(54, 2), |
| e_phnum(56, 2), |
| e_shentsize(58, 2), |
| e_shnum(60, 2), |
| e_shstrndx(62, 2); |
| |
| final int off; |
| final int sz; |
| |
| Elf64_Ehdr(int offset, int size) { |
| this.off = offset; |
| this.sz = size; |
| } |
| |
| static int totalsize = 64; |
| |
| /** |
| * Elf64_Ehdr defines |
| */ |
| |
| /** |
| * e_ident |
| */ |
| static final int EI_MAG0 = 0; |
| static final byte ELFMAG0 = 0x7f; |
| static final int EI_MAG1 = 1; |
| static final byte ELFMAG1 = 0x45; |
| static final int EI_MAG2 = 2; |
| static final byte ELFMAG2 = 0x4c; |
| static final int EI_MAG3 = 3; |
| static final byte ELFMAG3 = 0x46; |
| static final int EI_CLASS = 4; |
| static final byte ELFCLASS64 = 0x2; |
| |
| static final int EI_DATA = 5; |
| static final byte ELFDATA2LSB = 0x1; |
| |
| static final int EI_VERSION = 6; |
| static final byte EV_CURRENT = 0x1; |
| |
| static final int EI_OSABI = 7; |
| static final byte ELFOSABI_NONE = 0x0; |
| |
| /** |
| * e_type |
| */ |
| static final char ET_REL = 0x1; |
| |
| /** |
| * e_machine |
| */ |
| static final char EM_NONE = 0; |
| static final char EM_X86_64 = 62; |
| static final char EM_AARCH64 = 183; |
| |
| } |
| |
| /** |
| * Elf64_Shdr structure defines |
| */ |
| enum Elf64_Shdr { |
| sh_name( 0, 4), |
| sh_type( 4, 4), |
| sh_flags( 8, 8), |
| sh_addr(16, 8), |
| sh_offset(24, 8), |
| sh_size(32, 8), |
| sh_link(40, 4), |
| sh_info(44, 4), |
| sh_addralign(48, 8), |
| sh_entsize(56, 8); |
| |
| final int off; |
| final int sz; |
| |
| Elf64_Shdr(int offset, int size) { |
| this.off = offset; |
| this.sz = size; |
| } |
| |
| static int totalsize = 64; |
| |
| /** |
| * Elf64_Shdr defines |
| */ |
| |
| /** |
| * sh_type |
| */ |
| static final int SHT_PROGBITS = 0x1; |
| static final int SHT_SYMTAB = 0x2; |
| static final int SHT_STRTAB = 0x3; |
| static final int SHT_RELA = 0x4; |
| static final int SHT_NOBITS = 0x8; |
| static final int SHT_REL = 0x9; |
| |
| static final byte SHN_UNDEF = 0x0; |
| |
| /** |
| * sh_flag |
| */ |
| static final int SHF_WRITE = 0x1; |
| static final int SHF_ALLOC = 0x2; |
| static final int SHF_EXECINSTR = 0x4; |
| |
| } |
| |
| /** |
| * Symbol table entry definitions |
| * |
| * Elf64_Sym structure defines |
| */ |
| enum Elf64_Sym { |
| st_name( 0, 4), |
| st_info( 4, 1), |
| st_other( 5, 1), |
| st_shndx( 6, 2), |
| st_value( 8, 8), |
| st_size(16, 8); |
| |
| final int off; |
| final int sz; |
| |
| Elf64_Sym(int offset, int size) { |
| this.off = offset; |
| this.sz = size; |
| } |
| |
| static int totalsize = 24; |
| |
| /* ST_BIND is in bits 4-7 of st_info. ST_TYPE is in low 4 bits */ |
| static final byte STB_LOCAL = 0x0; |
| static final byte STB_GLOBAL = 0x1; |
| |
| static final byte STT_NOTYPE = 0x0; |
| static final byte STT_OBJECT = 0x1; |
| static final byte STT_FUNC = 0x2; |
| |
| static byte ELF64_ST_INFO(byte bind, byte type) { |
| return (byte)(((bind) << 4) + ((type) & 0xf)); |
| } |
| |
| } |
| |
| /** |
| * Elf64_Rel structure defines |
| */ |
| enum Elf64_Rel { |
| r_offset( 0, 8), |
| r_info( 8, 8); |
| |
| final int off; |
| final int sz; |
| |
| Elf64_Rel(int offset, int size) { |
| this.off = offset; |
| this.sz = size; |
| } |
| |
| static int totalsize = 16; |
| |
| /** |
| * Relocation types |
| */ |
| |
| static final int R_X86_64_NONE = 0x0; |
| static final int R_X86_64_64 = 0x1; |
| static final int R_X86_64_PC32 = 0x2; |
| static final int R_X86_64_PLT32 = 0x4; |
| static final int R_X86_64_GOTPCREL = 0x9; |
| |
| static final int R_AARCH64_NONE = 256; |
| static final int R_AARCH64_ABS64 = 257; |
| static final int R_AARCH64_CALL26 = 283; |
| static final int R_AARCH64_ADR_GOT_PAGE = 311; |
| static final int R_AARCH64_LD64_GOT_LO12_NC = 312; |
| |
| static final int R_AARCH64_MOVW_UABS_G0_NC = 264; |
| static final int R_AARCH64_MOVW_UABS_G1_NC = 266; |
| static final int R_AARCH64_MOVW_UABS_G2_NC = 268; |
| |
| static final int R_AARCH64_ADR_PREL_PG_HI21 = 275; |
| static final int R_AARCH64_ADD_ABS_LO12_NC = 277; |
| static final int R_AARCH64_LDST64_ABS_LO12_NC = 286; |
| } |
| |
| /** |
| * Elf64_Rela structure defines |
| */ |
| enum Elf64_Rela { |
| r_offset( 0, 8), |
| r_info( 8, 8), |
| r_addend(16, 8); |
| |
| final int off; |
| final int sz; |
| |
| Elf64_Rela(int offset, int size) { |
| this.off = offset; |
| this.sz = size; |
| } |
| |
| static int totalsize = 24; |
| |
| static final int R_X86_64_NONE = 0x0; |
| static final int R_X86_64_64 = 0x1; |
| static final int R_X86_64_PC32 = 0x2; |
| static final int R_X86_64_PLT32 = 0x4; |
| static final int R_X86_64_GOTPCREL = 0x9; |
| |
| static final int R_AARCH64_NONE = 256; |
| static final int R_AARCH64_ABS64 = 257; |
| static final int R_AARCH64_CALL26 = 283; |
| static final int R_AARCH64_ADR_GOT_PAGE = 311; |
| static final int R_AARCH64_LD64_GOT_LO12_NC = 312; |
| |
| static final int R_AARCH64_MOVW_UABS_G0_NC = 264; |
| static final int R_AARCH64_MOVW_UABS_G1_NC = 266; |
| static final int R_AARCH64_MOVW_UABS_G2_NC = 268; |
| |
| static final int R_AARCH64_ADR_PREL_PG_HI21 = 275; |
| static final int R_AARCH64_ADD_ABS_LO12_NC = 277; |
| static final int R_AARCH64_LDST64_ABS_LO12_NC = 286; |
| |
| static long ELF64_R_INFO(int symidx, int type) { |
| return (((long)symidx << 32) + type); |
| } |
| |
| } |
| //@formatter:on |
| } |
