1 /* $NetBSD: netbsd.cpp,v 1.2 2013/06/20 13:36:48 kiyohara Exp $ */ 2 /* 3 * Copyright (c) 2012 KIYOHARA Takashi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #include <e32cons.h> 28 #include <e32std.h> 29 #include <f32file.h> 30 31 #include "e32boot.h" 32 #include "elf.h" 33 #include "netbsd.h" 34 35 36 NetBSD * 37 NetBSD::New(const TDesC &aFilename) 38 { 39 NetBSD *netbsd = NULL; 40 RFs fsSession; 41 RFile file; 42 TInt size; 43 union { 44 Elf32_Ehdr elf; 45 } hdr; 46 47 /* Connect to FileServer Session */ 48 User::LeaveIfError(fsSession.Connect()); 49 50 User::LeaveIfError(file.Open(fsSession, aFilename, EFileRead)); 51 User::LeaveIfError(file.Size(size)); 52 53 TPtr hdrBuf((TUint8 *)&hdr, sizeof(hdr)); 54 User::LeaveIfError(file.Read(hdrBuf)); 55 /* Currently support is ELF only. */ 56 if (Mem::Compare((TUint8 *)hdr.elf.e_ident, SELFMAG, 57 (TUint8 *)ELFMAG, SELFMAG) == 0) { 58 netbsd = new (ELeave) ELF(size); 59 } else 60 User::Leave(KErrNotSupported); 61 TInt pos = 0; 62 User::LeaveIfError(file.Seek(ESeekStart, pos)); 63 64 TPtr fileBuf(netbsd->Buffer, size); 65 User::LeaveIfError(file.Read(fileBuf)); 66 if (fileBuf.Length() != size) 67 User::Leave(KErrNotFound); 68 file.Close(); 69 70 /* Close FileServer Session */ 71 fsSession.Close(); 72 73 netbsd->LoadDescriptor = 74 (struct loaddesc *)PAGE_ALIGN(User::AllocL(ALIGN_SAFE_PAGE_SIZE)); 75 76 return netbsd; 77 } 78 79 NetBSD * 80 NetBSD::New(const TDesC &aFilename, const TDesC &aArgs) 81 { 82 NetBSD *netbsd = New(aFilename); 83 84 netbsd->Args = &aArgs; 85 86 return netbsd; 87 } 88 89 90 void 91 ELF::ParseHeader(void) 92 { 93 struct loaddesc *loaddesc = LoadDescriptor; 94 Elf32_Ehdr ehdr; 95 Elf32_Phdr *phdr = NULL; 96 int PhdrSize, i; 97 98 Mem::Copy(&ehdr, Buffer, sizeof(ehdr)); 99 PhdrSize = sizeof(Elf32_Phdr) * ehdr.e_phnum; 100 phdr = (Elf32_Phdr *) new (ELeave) TUint8[PhdrSize]; 101 Mem::Copy(phdr, Buffer + ehdr.e_phoff, PhdrSize); 102 103 for (i = 0; i < ehdr.e_phnum; i++) { 104 if (phdr[i].p_type != PT_LOAD || 105 (phdr[i].p_flags & (PF_W | PF_X)) == 0) 106 continue; 107 108 loaddesc->addr = VTOP(phdr[i].p_vaddr); 109 loaddesc->offset = phdr[i].p_offset; 110 loaddesc->size = phdr[i].p_filesz; 111 loaddesc++; 112 } 113 /* Terminate loaddesc. */ 114 loaddesc->addr = 0xffffffff; 115 loaddesc->offset = 0xffffffff; 116 loaddesc->size = 0xffffffff; 117 118 EntryPoint = ehdr.e_entry; 119 } 120