/**
* 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.
*/
int rtldrELFOpen(PRTLDRREADER pReader, uint32_t fFlags, RTLDRARCH enmArch, PRTLDRMOD phLdrMod)
{
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;
}
/**
* Open part with reader.
*
* @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 phMod Where to store the handle.
*/
int rtldrOpenWithReader(PRTLDRREADER pReader, uint32_t fFlags, RTLDRARCH enmArch, 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 interpreter instance depending on the signature.
*/
if (uSign.u32 == IMAGE_NT_SIGNATURE)
#ifdef LDR_WITH_PE
rc = rtldrPEOpen(pReader, fFlags, enmArch, offHdr, phMod);
#else
rc = VERR_PE_EXE_NOT_SUPPORTED;
#endif
else if (uSign.u32 == IMAGE_ELF_SIGNATURE)
/** @copydoc KLDRRDROPS::pfnName */
static const char * rtkldrRdr_Name(PKRDR pRdr)
{
PRTLDRREADER pReader = ((PRTKLDRRDR)pRdr)->pReader;
return pReader->pfnLogName(pReader);
}
/** @copydoc KLDRRDROPS::pfnTell */
static KFOFF rtkldrRdr_Tell( PKRDR pRdr)
{
PRTLDRREADER pReader = ((PRTKLDRRDR)pRdr)->pReader;
return (KFOFF)pReader->pfnTell(pReader);
}
/** @copydoc KLDRRDROPS::pfnAllUnmap */
static int rtkldrRdr_AllUnmap(PKRDR pRdr, const void *pvBits)
{
PRTLDRREADER pReader = ((PRTKLDRRDR)pRdr)->pReader;
int rc = pReader->pfnUnmap(pReader, pvBits);
return rtkldrConvertErrorFromIPRT(rc);
}
/** @copydoc KLDRRDROPS::pfnRead */
static int rtkldrRdr_Read( PKRDR pRdr, void *pvBuf, KSIZE cb, KFOFF off)
{
PRTLDRREADER pReader = ((PRTKLDRRDR)pRdr)->pReader;
int rc = pReader->pfnRead(pReader, pvBuf, cb, off);
return rtkldrConvertErrorFromIPRT(rc);
}
/** @copydoc KLDRRDROPS::pfnDestroy */
static int rtkldrRdr_Destroy( PKRDR pRdr)
{
PRTLDRREADER pReader = ((PRTKLDRRDR)pRdr)->pReader;
int rc = pReader->pfnDestroy(pReader);
return rtkldrConvertErrorFromIPRT(rc);
}
