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/* $Id: ldrEx.cpp $ */
/** @file
* IPRT - Binary Image Loader, Extended Features.
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* 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.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP RTLOGGROUP_LDR
#include <iprt/ldr.h>
#include <iprt/alloc.h>
#include <iprt/assert.h>
#include <iprt/log.h>
#include <iprt/string.h>
#include <iprt/err.h>
#include "internal/ldr.h"
#include "internal/ldrMZ.h"
/**
* Open part with reader.
*
* @returns iprt status code.
* @param pReader The loader reader instance which will provide the raw image bits.
* @param phMod Where to store the handle.
*/
int rtldrOpenWithReader(PRTLDRREADER pReader, PRTLDRMOD phMod)
{
/*
* Read and verify the file signature.
*/
union
{
char ach[4];
uint16_t au16[2];
uint32_t u32;
} uSign;
int rc = pReader->pfnRead(pReader, &uSign, sizeof(uSign), 0);
if (RT_FAILURE(rc))
return rc;
#ifndef LDR_WITH_KLDR
if ( uSign.au16[0] != IMAGE_DOS_SIGNATURE
&& uSign.u32 != IMAGE_NT_SIGNATURE
&& uSign.u32 != IMAGE_ELF_SIGNATURE
&& uSign.au16[0] != IMAGE_LX_SIGNATURE)
{
Log(("rtldrOpenWithReader: %s: unknown magic %#x / '%.4s\n", pReader->pfnLogName(pReader), uSign.u32, &uSign.ach[0]));
return VERR_INVALID_EXE_SIGNATURE;
}
#endif
uint32_t offHdr = 0;
if (uSign.au16[0] == IMAGE_DOS_SIGNATURE)
{
rc = pReader->pfnRead(pReader, &offHdr, sizeof(offHdr), RT_OFFSETOF(IMAGE_DOS_HEADER, e_lfanew));
if (RT_FAILURE(rc))
return rc;
if (offHdr <= sizeof(IMAGE_DOS_HEADER))
{
Log(("rtldrOpenWithReader: %s: no new header / invalid offset %#RX32\n", pReader->pfnLogName(pReader), offHdr));
return VERR_INVALID_EXE_SIGNATURE;
}
rc = pReader->pfnRead(pReader, &uSign, sizeof(uSign), offHdr);
if (RT_FAILURE(rc))
return rc;
if ( uSign.u32 != IMAGE_NT_SIGNATURE
&& uSign.au16[0] != IMAGE_LX_SIGNATURE
&& uSign.au16[0] != IMAGE_LE_SIGNATURE
&& uSign.au16[0] != IMAGE_NE_SIGNATURE)
{
Log(("rtldrOpenWithReader: %s: unknown new magic %#x / '%.4s\n", pReader->pfnLogName(pReader), uSign.u32, &uSign.ach[0]));
return VERR_INVALID_EXE_SIGNATURE;
}
}
/*
* Create image intepreter instance depending on the signature.
*/
if (uSign.u32 == IMAGE_NT_SIGNATURE)
#ifdef LDR_WITH_PE
rc = rtldrPEOpen(pReader, offHdr, phMod);
#else
rc = VERR_PE_EXE_NOT_SUPPORTED;
#endif
else if (uSign.u32 == IMAGE_ELF_SIGNATURE)
#if defined(LDR_WITH_ELF)
rc = rtldrELFOpen(pReader, phMod);
#else
rc = VERR_ELF_EXE_NOT_SUPPORTED;
#endif
else if (uSign.au16[0] == IMAGE_LX_SIGNATURE)
#ifdef LDR_WITH_LX
rc = rtldrLXOpen(pReader, offHdr, phMod);
#else
rc = VERR_LX_EXE_NOT_SUPPORTED;
#endif
else if (uSign.au16[0] == IMAGE_LE_SIGNATURE)
#ifdef LDR_WITH_LE
rc = rtldrLEOpen(pReader, phMod);
#else
rc = VERR_LE_EXE_NOT_SUPPORTED;
#endif
else if (uSign.au16[0] == IMAGE_NE_SIGNATURE)
#ifdef LDR_WITH_NE
rc = rtldrNEOpen(pReader, phMod);
#else
rc = VERR_NE_EXE_NOT_SUPPORTED;
#endif
else if (uSign.au16[0] == IMAGE_DOS_SIGNATURE)
#ifdef LDR_WITH_MZ
rc = rtldrMZOpen(pReader, phMod);
#else
rc = VERR_MZ_EXE_NOT_SUPPORTED;
#endif
else if (/* uSign.u32 == IMAGE_AOUT_A_SIGNATURE
|| uSign.u32 == IMAGE_AOUT_Z_SIGNATURE*/ /** @todo find the aout magics in emx or binutils. */
0)
#ifdef LDR_WITH_AOUT
rc = rtldrAOUTOpen(pReader, phMod);
#else
rc = VERR_AOUT_EXE_NOT_SUPPORTED;
#endif
else
{
#ifndef LDR_WITH_KLDR
Log(("rtldrOpenWithReader: %s: the format isn't implemented %#x / '%.4s\n", pReader->pfnLogName(pReader), uSign.u32, &uSign.ach[0]));
#endif
rc = VERR_INVALID_EXE_SIGNATURE;
}
#ifdef LDR_WITH_KLDR
/* Try kLdr if it's a format we don't recognize. */
if (rc <= VERR_INVALID_EXE_SIGNATURE && rc > VERR_BAD_EXE_FORMAT)
rc = rtldrkLdrOpen(pReader, phMod);
#endif
LogFlow(("rtldrOpenWithReader: %s: returns %Rrc *phMod=%p\n", pReader->pfnLogName(pReader), rc, *phMod));
return rc;
}
/**
* Gets the size of the loaded image.
* This is only supported for modules which has been opened using RTLdrOpen() and RTLdrOpenBits().
*
* @returns image size (in bytes).
* @returns ~(size_t)0 on if not opened by RTLdrOpen().
* @param hLdrMod Handle to the loader module.
* @remark Not supported for RTLdrLoad() images.
*/
RTDECL(size_t) RTLdrSize(RTLDRMOD hLdrMod)
{
LogFlow(("RTLdrSize: hLdrMod=%RTldrm\n", hLdrMod));
/*
* Validate input.
*/
AssertMsgReturn(rtldrIsValid(hLdrMod), ("hLdrMod=%p\n", hLdrMod), ~(size_t)0);
PRTLDRMODINTERNAL pMod = (PRTLDRMODINTERNAL)hLdrMod;
AssertMsgReturn(pMod->eState == LDR_STATE_OPENED, ("eState=%d\n", pMod->eState), ~(size_t)0);
/*
* Do it.
*/
size_t cb = pMod->pOps->pfnGetImageSize(pMod);
LogFlow(("RTLdrSize: returns %zu\n", cb));
return cb;
}
/**
* Loads the image into a buffer provided by the user and applies fixups
* for the given base address.
*
* @returns iprt status code.
* @param hLdrMod The load module handle.
* @param pvBits Where to put the bits.
* Must be as large as RTLdrSize() suggests.
* @param BaseAddress The base address.
* @param pfnGetImport Callback function for resolving imports one by one.
* @param pvUser User argument for the callback.
* @remark Not supported for RTLdrLoad() images.
*/
RTDECL(int) RTLdrGetBits(RTLDRMOD hLdrMod, void *pvBits, RTUINTPTR BaseAddress, PFNRTLDRIMPORT pfnGetImport, void *pvUser)
{
LogFlow(("RTLdrGetBits: hLdrMod=%RTldrm pvBits=%p BaseAddress=%RTptr pfnGetImport=%p pvUser=%p\n",
hLdrMod, pvBits, BaseAddress, pfnGetImport, pvUser));
/*
* Validate input.
*/
AssertMsgReturn(rtldrIsValid(hLdrMod), ("hLdrMod=%p\n", hLdrMod), VERR_INVALID_HANDLE);
AssertMsgReturn(VALID_PTR(pvBits), ("pvBits=%p\n", pvBits), VERR_INVALID_PARAMETER);
AssertMsgReturn(VALID_PTR(pfnGetImport), ("pfnGetImport=%p\n", pfnGetImport), VERR_INVALID_PARAMETER);
PRTLDRMODINTERNAL pMod = (PRTLDRMODINTERNAL)hLdrMod;
AssertMsgReturn(pMod->eState == LDR_STATE_OPENED, ("eState=%d\n", pMod->eState), VERR_WRONG_ORDER);
/*
* Do it.
*/
int rc = pMod->pOps->pfnGetBits(pMod, pvBits, BaseAddress, pfnGetImport, pvUser);
LogFlow(("RTLdrGetBits: returns %Rrc\n",rc));
return rc;
}
/**
* Relocates bits after getting them.
* Useful for code which moves around a bit.
*
* @returns iprt status code.
* @param hLdrMod The loader module handle.
* @param pvBits Where the image bits are.
* Must've been passed to RTLdrGetBits().
* @param NewBaseAddress The new base address.
* @param OldBaseAddress The old base address.
* @param pfnGetImport Callback function for resolving imports one by one.
* @param pvUser User argument for the callback.
* @remark Not supported for RTLdrLoad() images.
*/
RTDECL(int) RTLdrRelocate(RTLDRMOD hLdrMod, void *pvBits, RTUINTPTR NewBaseAddress, RTUINTPTR OldBaseAddress,
PFNRTLDRIMPORT pfnGetImport, void *pvUser)
{
LogFlow(("RTLdrRelocate: hLdrMod=%RTldrm pvBits=%p NewBaseAddress=%RTptr OldBaseAddress=%RTptr pfnGetImport=%p pvUser=%p\n",
hLdrMod, pvBits, NewBaseAddress, OldBaseAddress, pfnGetImport, pvUser));
/*
* Validate input.
*/
AssertMsgReturn(rtldrIsValid(hLdrMod), ("hLdrMod=%p\n", hLdrMod), VERR_INVALID_HANDLE);
AssertMsgReturn(VALID_PTR(pvBits), ("pvBits=%p\n", pvBits), VERR_INVALID_PARAMETER);
AssertMsgReturn(VALID_PTR(pfnGetImport), ("pfnGetImport=%p\n", pfnGetImport), VERR_INVALID_PARAMETER);
PRTLDRMODINTERNAL pMod = (PRTLDRMODINTERNAL)hLdrMod;
AssertMsgReturn(pMod->eState == LDR_STATE_OPENED, ("eState=%d\n", pMod->eState), VERR_WRONG_ORDER);
/*
* Do it.
*/
int rc = pMod->pOps->pfnRelocate(pMod, pvBits, NewBaseAddress, OldBaseAddress, pfnGetImport, pvUser);
LogFlow(("RTLdrRelocate: returns %Rrc\n", rc));
return rc;
}
/**
* Gets the address of a named exported symbol.
*
* This function differs from the plain one in that it can deal with
* both GC and HC address sizes, and that it can calculate the symbol
* value relative to any given base address.
*
* @returns iprt status code.
* @param hLdrMod The loader module handle.
* @param pvBits Optional pointer to the loaded image.
* Set this to NULL if no RTLdrGetBits() processed image bits are available.
* Not supported for RTLdrLoad() images and must be NULL.
* @param BaseAddress Image load address.
* Not supported for RTLdrLoad() images and must be 0.
* @param pszSymbol Symbol name.
* @param pValue Where to store the symbol value.
*/
RTDECL(int) RTLdrGetSymbolEx(RTLDRMOD hLdrMod, const void *pvBits, RTUINTPTR BaseAddress, const char *pszSymbol, RTUINTPTR *pValue)
{
LogFlow(("RTLdrGetSymbolEx: hLdrMod=%RTldrm pvBits=%p BaseAddress=%RTptr pszSymbol=%p:{%s} pValue\n",
hLdrMod, pvBits, BaseAddress, pszSymbol, pszSymbol, pValue));
/*
* Validate input.
*/
AssertMsgReturn(rtldrIsValid(hLdrMod), ("hLdrMod=%p\n", hLdrMod), VERR_INVALID_HANDLE);
AssertMsgReturn(!pvBits || VALID_PTR(pvBits), ("pvBits=%p\n", pvBits), VERR_INVALID_PARAMETER);
AssertMsgReturn(pszSymbol, ("pszSymbol=%p\n", pszSymbol), VERR_INVALID_PARAMETER);
AssertMsgReturn(VALID_PTR(pValue), ("pValue=%p\n", pvBits), VERR_INVALID_PARAMETER);
PRTLDRMODINTERNAL pMod = (PRTLDRMODINTERNAL)hLdrMod;
//AssertMsgReturn(pMod->eState == LDR_STATE_OPENED, ("eState=%d\n", pMod->eState), VERR_WRONG_ORDER);
/*
* Do it.
*/
int rc;
if (pMod->pOps->pfnGetSymbolEx)
rc = pMod->pOps->pfnGetSymbolEx(pMod, pvBits, BaseAddress, pszSymbol, pValue);
else if (!BaseAddress && !pvBits)
{
void *pvValue;
rc = pMod->pOps->pfnGetSymbol(pMod, pszSymbol, &pvValue);
if (RT_SUCCESS(rc))
*pValue = (uintptr_t)pvValue;
}
else
AssertMsgFailedReturn(("BaseAddress=%RTptr pvBits=%p\n", BaseAddress, pvBits), VERR_INVALID_FUNCTION);
LogFlow(("RTLdrGetSymbolEx: returns %Rrc *pValue=%p\n", rc, *pValue));
return rc;
}
/**
* Enumerates all symbols in a module.
*
* @returns iprt status code.
* @param hLdrMod The loader module handle.
* @param fFlags Flags indicating what to return and such.
* @param pvBits Optional pointer to the loaded image.
* Set this to NULL if no RTLdrGetBits() processed image bits are available.
* @param BaseAddress Image load address.
* @param pfnCallback Callback function.
* @param pvUser User argument for the callback.
* @remark Not supported for RTLdrLoad() images.
*/
RTDECL(int) RTLdrEnumSymbols(RTLDRMOD hLdrMod, unsigned fFlags, const void *pvBits, RTUINTPTR BaseAddress, PFNRTLDRENUMSYMS pfnCallback, void *pvUser)
{
LogFlow(("RTLdrEnumSymbols: hLdrMod=%RTldrm fFlags=%#x pvBit=%p BaseAddress=%RTptr pfnCallback=%p pvUser=%p\n",
hLdrMod, fFlags, pvBits, BaseAddress, pfnCallback, pvUser));
/*
* Validate input.
*/
AssertMsgReturn(rtldrIsValid(hLdrMod), ("hLdrMod=%p\n", hLdrMod), VERR_INVALID_HANDLE);
AssertMsgReturn(!pvBits || VALID_PTR(pvBits), ("pvBits=%p\n", pvBits), VERR_INVALID_PARAMETER);
AssertMsgReturn(VALID_PTR(pfnCallback), ("pfnCallback=%p\n", pfnCallback), VERR_INVALID_PARAMETER);
PRTLDRMODINTERNAL pMod = (PRTLDRMODINTERNAL)hLdrMod;
//AssertMsgReturn(pMod->eState == LDR_STATE_OPENED, ("eState=%d\n", pMod->eState), VERR_WRONG_ORDER);
/*
* Do it.
*/
int rc = pMod->pOps->pfnEnumSymbols(pMod, fFlags, pvBits, BaseAddress, pfnCallback, pvUser);
LogFlow(("RTLdrEnumSymbols: returns %Rrc\n", rc));
return rc;
}
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