load_elf.cpp revision 1.1.2.2
1 1.1.2.2 bouyer /* $NetBSD: load_elf.cpp,v 1.1.2.2 2001/02/11 19:09:56 bouyer Exp $ */ 2 1.1.2.2 bouyer 3 1.1.2.2 bouyer /*- 4 1.1.2.2 bouyer * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 1.1.2.2 bouyer * All rights reserved. 6 1.1.2.2 bouyer * 7 1.1.2.2 bouyer * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 bouyer * by UCHIYAMA Yasushi. 9 1.1.2.2 bouyer * 10 1.1.2.2 bouyer * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 bouyer * modification, are permitted provided that the following conditions 12 1.1.2.2 bouyer * are met: 13 1.1.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 bouyer * documentation and/or other materials provided with the distribution. 18 1.1.2.2 bouyer * 3. All advertising materials mentioning features or use of this software 19 1.1.2.2 bouyer * must display the following acknowledgement: 20 1.1.2.2 bouyer * This product includes software developed by the NetBSD 21 1.1.2.2 bouyer * Foundation, Inc. and its contributors. 22 1.1.2.2 bouyer * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1.2.2 bouyer * contributors may be used to endorse or promote products derived 24 1.1.2.2 bouyer * from this software without specific prior written permission. 25 1.1.2.2 bouyer * 26 1.1.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1.2.2 bouyer * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1.2.2 bouyer * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1.2.2 bouyer * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1.2.2 bouyer * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1.2.2 bouyer * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1.2.2 bouyer * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1.2.2 bouyer * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1.2.2 bouyer * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1.2.2 bouyer * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1.2.2 bouyer * POSSIBILITY OF SUCH DAMAGE. 37 1.1.2.2 bouyer */ 38 1.1.2.2 bouyer 39 1.1.2.2 bouyer #include <load.h> 40 1.1.2.2 bouyer #include <load_elf.h> 41 1.1.2.2 bouyer #include <console.h> 42 1.1.2.2 bouyer #include <memory.h> 43 1.1.2.2 bouyer #include <file.h> 44 1.1.2.2 bouyer 45 1.1.2.2 bouyer ElfLoader::ElfLoader(Console *&cons, MemoryManager *&mem) 46 1.1.2.2 bouyer : Loader(cons, mem) 47 1.1.2.2 bouyer { 48 1.1.2.2 bouyer DPRINTF((TEXT("Loader: ELF\n"))); 49 1.1.2.2 bouyer } 50 1.1.2.2 bouyer 51 1.1.2.2 bouyer ElfLoader::~ElfLoader(void) 52 1.1.2.2 bouyer { 53 1.1.2.2 bouyer } 54 1.1.2.2 bouyer 55 1.1.2.2 bouyer BOOL 56 1.1.2.2 bouyer ElfLoader::setFile(File *&file) 57 1.1.2.2 bouyer { 58 1.1.2.2 bouyer Loader::setFile(file); 59 1.1.2.2 bouyer 60 1.1.2.2 bouyer /* read ELF header and check it */ 61 1.1.2.2 bouyer if (!read_header()) 62 1.1.2.2 bouyer return FALSE; 63 1.1.2.2 bouyer /* read program header */ 64 1.1.2.2 bouyer size_t sz = _eh.e_phnum * _eh.e_phentsize; 65 1.1.2.2 bouyer 66 1.1.2.2 bouyer return _file->read(_ph, sz, _eh.e_phoff) == sz; 67 1.1.2.2 bouyer } 68 1.1.2.2 bouyer 69 1.1.2.2 bouyer size_t 70 1.1.2.2 bouyer ElfLoader::memorySize() 71 1.1.2.2 bouyer { 72 1.1.2.2 bouyer int i; 73 1.1.2.2 bouyer Elf_Phdr *ph = _ph; 74 1.1.2.2 bouyer size_t sz = 0; 75 1.1.2.2 bouyer 76 1.1.2.2 bouyer DPRINTF((TEXT("file size: "))); 77 1.1.2.2 bouyer for (i = 0; i < _eh.e_phnum; i++, ph++) { 78 1.1.2.2 bouyer if (ph->p_type == PT_LOAD) { 79 1.1.2.2 bouyer size_t filesz = ph->p_filesz; 80 1.1.2.2 bouyer DPRINTF((TEXT("+0x%x"), filesz)); 81 1.1.2.2 bouyer sz += _mem->roundPage(filesz); 82 1.1.2.2 bouyer } 83 1.1.2.2 bouyer } 84 1.1.2.2 bouyer DPRINTF((TEXT(" = 0x%x byte\n"), sz)); 85 1.1.2.2 bouyer return sz; 86 1.1.2.2 bouyer } 87 1.1.2.2 bouyer 88 1.1.2.2 bouyer kaddr_t 89 1.1.2.2 bouyer ElfLoader::jumpAddr() 90 1.1.2.2 bouyer { 91 1.1.2.2 bouyer DPRINTF((TEXT("kernel entry address: 0x%08x\n"), _eh.e_entry)); 92 1.1.2.2 bouyer return _eh.e_entry; 93 1.1.2.2 bouyer } 94 1.1.2.2 bouyer 95 1.1.2.2 bouyer BOOL 96 1.1.2.2 bouyer ElfLoader::load() 97 1.1.2.2 bouyer { 98 1.1.2.2 bouyer Elf_Phdr *ph; 99 1.1.2.2 bouyer int i; 100 1.1.2.2 bouyer 101 1.1.2.2 bouyer _load_segment_start(); 102 1.1.2.2 bouyer 103 1.1.2.2 bouyer for (i = 0, ph = _ph; i < _eh.e_phnum; i++, ph++) { 104 1.1.2.2 bouyer if (ph->p_type == PT_LOAD) { 105 1.1.2.2 bouyer size_t filesz = ph->p_filesz; 106 1.1.2.2 bouyer size_t memsz = ph->p_memsz; 107 1.1.2.2 bouyer vaddr_t kv = ph->p_vaddr; 108 1.1.2.2 bouyer off_t fileofs = ph->p_offset; 109 1.1.2.2 bouyer DPRINTF((TEXT("[%d] vaddr 0x%08x file size 0x%x mem size 0x%x\n"), 110 1.1.2.2 bouyer i, kv, filesz, memsz)); 111 1.1.2.2 bouyer _load_segment(kv, memsz, fileofs, filesz); 112 1.1.2.2 bouyer } 113 1.1.2.2 bouyer } 114 1.1.2.2 bouyer /* tag chain still opening */ 115 1.1.2.2 bouyer 116 1.1.2.2 bouyer return TRUE; 117 1.1.2.2 bouyer } 118 1.1.2.2 bouyer 119 1.1.2.2 bouyer BOOL 120 1.1.2.2 bouyer ElfLoader::read_header(void) 121 1.1.2.2 bouyer { 122 1.1.2.2 bouyer // read ELF header 123 1.1.2.2 bouyer _file->read(&_eh, sizeof(Elf_Ehdr), 0); 124 1.1.2.2 bouyer 125 1.1.2.2 bouyer // check ELF Magic. 126 1.1.2.2 bouyer if (!is_elf_file()) { 127 1.1.2.2 bouyer DPRINTF((TEXT("not a ELF file.\n"))); 128 1.1.2.2 bouyer return FALSE; 129 1.1.2.2 bouyer } 130 1.1.2.2 bouyer 131 1.1.2.2 bouyer // Windows CE is 32bit little-endian only. 132 1.1.2.2 bouyer if (_eh.e_ident[EI_DATA] != ELFDATA2LSB || 133 1.1.2.2 bouyer _eh.e_ident[EI_CLASS] != ELFCLASS32) { 134 1.1.2.2 bouyer DPRINTF((TEXT("invalid class/data(%d/%d)\n"), 135 1.1.2.2 bouyer _eh.e_ident[EI_CLASS], _eh.e_ident[EI_DATA])); 136 1.1.2.2 bouyer return FALSE; 137 1.1.2.2 bouyer } 138 1.1.2.2 bouyer 139 1.1.2.2 bouyer // Is native architecture? 140 1.1.2.2 bouyer switch(_eh.e_machine) { 141 1.1.2.2 bouyer ELF32_MACHDEP_ID_CASES; 142 1.1.2.2 bouyer default: 143 1.1.2.2 bouyer DPRINTF((TEXT("not a native architecture. machine = %d\n"), 144 1.1.2.2 bouyer _eh.e_machine)); 145 1.1.2.2 bouyer return FALSE; 146 1.1.2.2 bouyer } 147 1.1.2.2 bouyer 148 1.1.2.2 bouyer /* Check object type */ 149 1.1.2.2 bouyer if (_eh.e_type != ET_EXEC) { 150 1.1.2.2 bouyer DPRINTF((TEXT("not a executable file. type = %d\n"), 151 1.1.2.2 bouyer _eh.e_type)); 152 1.1.2.2 bouyer return FALSE; 153 1.1.2.2 bouyer } 154 1.1.2.2 bouyer 155 1.1.2.2 bouyer if (_eh.e_phoff == 0 || _eh.e_phnum == 0 || _eh.e_phnum > 16 || 156 1.1.2.2 bouyer _eh.e_phentsize != sizeof(Elf_Phdr)) { 157 1.1.2.2 bouyer DPRINTF((TEXT("invalid program header infomation.\n"))); 158 1.1.2.2 bouyer return FALSE; 159 1.1.2.2 bouyer } 160 1.1.2.2 bouyer 161 1.1.2.2 bouyer return TRUE; 162 1.1.2.2 bouyer } 163
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