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/* $Id$ */
/** @file
* IPRT - Binary Image Loader, Executable and Linker Format (ELF).
*/
/*
* Copyright (C) 2006-2010 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP RTLOGGROUP_LDR
#include <iprt/ldr.h>
#include "internal/iprt.h"
#include <iprt/alloc.h>
#include <iprt/assert.h>
#include <iprt/string.h>
#include <iprt/log.h>
#include <iprt/err.h>
#include "internal/ldrELF32.h"
#include "internal/ldrELF64.h"
#include "internal/ldrELFi386.h"
#include "internal/ldrELFAmd64.h"
#include "internal/ldr.h"
/*******************************************************************************
* Defined Constants And Macros *
*******************************************************************************/
/** Finds an ELF symbol table string. */
#define ELF_STR(pHdrs, iStr) ((pHdrs)->pStr + (iStr))
/** Finds an ELF section header string. */
#define ELF_SH_STR(pHdrs, iStr) ((pHdrs)->pShStr + (iStr))
/*******************************************************************************
* Internal Functions *
*******************************************************************************/
#ifdef LOG_ENABLED
static const char *rtldrElfGetShdrType(uint32_t iType);
#endif
/* Select ELF mode and include the template. */
#define ELF_MODE 32
#define Elf_Reloc Elf_Rel
#include "ldrELFRelocatable.cpp.h"
#undef ELF_MODE
#undef Elf_Reloc
#define ELF_MODE 64
#define Elf_Reloc Elf_Rela
#include "ldrELFRelocatable.cpp.h"
#undef ELF_MODE
#undef Elf_Reloc
#ifdef LOG_ENABLED
/**
* Gets the section type.
*
* @returns Pointer to read only string.
* @param iType The section type index.
*/
static const char *rtldrElfGetShdrType(uint32_t iType)
{
switch (iType)
{
case SHT_NULL: return "SHT_NULL";
case SHT_PROGBITS: return "SHT_PROGBITS";
case SHT_SYMTAB: return "SHT_SYMTAB";
case SHT_STRTAB: return "SHT_STRTAB";
case SHT_RELA: return "SHT_RELA";
case SHT_HASH: return "SHT_HASH";
case SHT_DYNAMIC: return "SHT_DYNAMIC";
case SHT_NOTE: return "SHT_NOTE";
case SHT_NOBITS: return "SHT_NOBITS";
case SHT_REL: return "SHT_REL";
case SHT_SHLIB: return "SHT_SHLIB";
case SHT_DYNSYM: return "SHT_DYNSYM";
default:
return "";
}
}
#endif
/**
* Open an ELF image.
*
* @returns iprt status code.
* @param pReader The loader reader instance which will provide the raw image bits.
* @param fFlags Reserved, MBZ.
* @param enmArch Architecture specifier.
* @param phLdrMod Where to store the handle.
* @param pErrInfo Where to return extended error information. Optional.
*/
int rtldrELFOpen(PRTLDRREADER pReader, uint32_t fFlags, RTLDRARCH enmArch, PRTLDRMOD phLdrMod, PRTERRINFO pErrInfo)
{
const char *pszLogName = pReader->pfnLogName(pReader); NOREF(pszLogName);
/*
* Read the ident to decide if this is 32-bit or 64-bit
* and worth dealing with.
*/
uint8_t e_ident[EI_NIDENT];
int rc = pReader->pfnRead(pReader, &e_ident, sizeof(e_ident), 0);
if (RT_FAILURE(rc))
return rc;
if ( e_ident[EI_MAG0] != ELFMAG0
|| e_ident[EI_MAG1] != ELFMAG1
|| e_ident[EI_MAG2] != ELFMAG2
|| e_ident[EI_MAG3] != ELFMAG3
|| ( e_ident[EI_CLASS] != ELFCLASS32
&& e_ident[EI_CLASS] != ELFCLASS64)
)
{
Log(("RTLdrELF: %s: Unsupported/invalid ident %.*Rhxs\n", pszLogName, sizeof(e_ident), e_ident));
return VERR_BAD_EXE_FORMAT;
}
if (e_ident[EI_DATA] != ELFDATA2LSB)
{
Log(("RTLdrELF: %s: ELF endian %x is unsupported\n", e_ident[EI_DATA]));
return VERR_LDRELF_ODD_ENDIAN;
}
if (e_ident[EI_CLASS] == ELFCLASS32)
rc = rtldrELF32Open(pReader, fFlags, enmArch, phLdrMod);
else
rc = rtldrELF64Open(pReader, fFlags, enmArch, phLdrMod);
return rc;
}
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