120 lines
3.3 KiB
C++
120 lines
3.3 KiB
C++
/* $NetBSD: netbsd.cpp,v 1.2 2013/06/20 13:36:48 kiyohara Exp $ */
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/*
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* Copyright (c) 2012 KIYOHARA Takashi
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* 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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*
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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
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <e32cons.h>
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#include <e32std.h>
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#include <f32file.h>
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#include "e32boot.h"
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#include "elf.h"
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#include "netbsd.h"
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NetBSD *
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NetBSD::New(const TDesC &aFilename)
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{
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NetBSD *netbsd = NULL;
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RFs fsSession;
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RFile file;
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TInt size;
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union {
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Elf32_Ehdr elf;
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} hdr;
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/* Connect to FileServer Session */
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User::LeaveIfError(fsSession.Connect());
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User::LeaveIfError(file.Open(fsSession, aFilename, EFileRead));
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User::LeaveIfError(file.Size(size));
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TPtr hdrBuf((TUint8 *)&hdr, sizeof(hdr));
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User::LeaveIfError(file.Read(hdrBuf));
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/* Currently support is ELF only. */
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if (Mem::Compare((TUint8 *)hdr.elf.e_ident, SELFMAG,
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(TUint8 *)ELFMAG, SELFMAG) == 0) {
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netbsd = new (ELeave) ELF(size);
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} else
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User::Leave(KErrNotSupported);
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TInt pos = 0;
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User::LeaveIfError(file.Seek(ESeekStart, pos));
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TPtr fileBuf(netbsd->Buffer, size);
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User::LeaveIfError(file.Read(fileBuf));
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if (fileBuf.Length() != size)
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User::Leave(KErrNotFound);
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file.Close();
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/* Close FileServer Session */
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fsSession.Close();
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netbsd->LoadDescriptor =
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(struct loaddesc *)PAGE_ALIGN(User::AllocL(ALIGN_SAFE_PAGE_SIZE));
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return netbsd;
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}
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NetBSD *
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NetBSD::New(const TDesC &aFilename, const TDesC &aArgs)
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{
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NetBSD *netbsd = New(aFilename);
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netbsd->Args = &aArgs;
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return netbsd;
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}
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void
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ELF::ParseHeader(void)
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{
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struct loaddesc *loaddesc = LoadDescriptor;
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Elf32_Ehdr ehdr;
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Elf32_Phdr *phdr = NULL;
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int PhdrSize, i;
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Mem::Copy(&ehdr, Buffer, sizeof(ehdr));
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PhdrSize = sizeof(Elf32_Phdr) * ehdr.e_phnum;
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phdr = (Elf32_Phdr *) new (ELeave) TUint8[PhdrSize];
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Mem::Copy(phdr, Buffer + ehdr.e_phoff, PhdrSize);
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for (i = 0; i < ehdr.e_phnum; i++) {
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if (phdr[i].p_type != PT_LOAD ||
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(phdr[i].p_flags & (PF_W | PF_X)) == 0)
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continue;
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loaddesc->addr = VTOP(phdr[i].p_vaddr);
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loaddesc->offset = phdr[i].p_offset;
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loaddesc->size = phdr[i].p_filesz;
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loaddesc++;
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}
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/* Terminate loaddesc. */
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loaddesc->addr = 0xffffffff;
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loaddesc->offset = 0xffffffff;
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loaddesc->size = 0xffffffff;
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EntryPoint = ehdr.e_entry;
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}
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