ldrELFRelocatable.cpp.h revision aecfb54650da43792aad73bb37c7dfe0f0b1239f
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * IPRT - Binary Image Loader, Template for ELF Relocatable Images.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Copyright (C) 2006-2007 Oracle Corporation
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * available from http://www.virtualbox.org. This file is free software;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * you can redistribute it and/or modify it under the terms of the GNU
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * General Public License (GPL) as published by the Free Software
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * The contents of this file may alternatively be used under the terms
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * of the Common Development and Distribution License Version 1.0
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * VirtualBox OSE distribution, in which case the provisions of the
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * CDDL are applicable instead of those of the GPL.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * You may elect to license modified versions of this file under the
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * terms and conditions of either the GPL or the CDDL or both.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/*******************************************************************************
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync* Defined Constants And Macros *
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync*******************************************************************************/
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync#define RTLDRMODELF RTLDRELF_MID(RTLDRMODELF,RT_NOTHING)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync#define PRTLDRMODELF RTLDRELF_MID(PRTLDRMODELF,RT_NOTHING)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync#define ELF_R_SYM(info) RTLDRELF_MID(ELF,_R_SYM)(info)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync#define ELF_R_TYPE(info) RTLDRELF_MID(ELF,_R_TYPE)(info)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync#define ELF_R_INFO(sym, type) RTLDRELF_MID(ELF,_R_INFO)(sym, type)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync#define ELF_ST_BIND(info) RTLDRELF_MID(ELF,_ST_BIND)(info)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/*******************************************************************************
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync* Structures and Typedefs *
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync*******************************************************************************/
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * The ELF loader structure.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsynctypedef struct RTLDRMODELF
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** Core module structure. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** Pointer to the reader instance. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** Pointer to readonly mapping of the image bits.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * This mapping is provided by the pReader. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const void *pvBits;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** The ELF header. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** Pointer to our copy of the section headers.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * The virtual addresses in this array is the 0 based assignments we've given the image.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Not valid if the image is DONE. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** The size of the loaded image. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** The symbol section index. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** Number of symbols in the table. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** Pointer to symbol table within RTLDRMODELF::pvBits. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** The string section index. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** Size of the string table. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** Pointer to string table within RTLDRMODELF::pvBits. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const char *pStr;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Maps the image bits into memory and resolve pointers into it.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @returns iprt status code.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pModElf The ELF loader module instance data.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param fNeedsBits Set if we actually need the pvBits member.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * If we don't, we can simply read the string and symbol sections, thus saving memory.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic int RTLDRELF_NAME(MapBits)(PRTLDRMODELF pModElf, bool fNeedsBits)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync int rc = pModElf->pReader->pfnMap(pModElf->pReader, &pModElf->pvBits);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const uint8_t *pu8 = (const uint8_t *)pModElf->pvBits;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pModElf->paSyms = (const Elf_Sym *)(pu8 + pModElf->paShdrs[pModElf->iSymSh].sh_offset);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pModElf->pStr = (const char *)(pu8 + pModElf->paShdrs[pModElf->iStrSh].sh_offset);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Get the symbol and symbol value.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @returns iprt status code.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pModElf The ELF loader module instance data.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param BaseAddr The base address which the module is being fixedup to.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pfnGetImport The callback function to use to resolve imports (aka unresolved externals).
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pvUser User argument to pass to the callback.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param iSym The symbol to get.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param ppSym Where to store the symbol pointer on success. (read only)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pSymValue Where to store the symbol value on success.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic int RTLDRELF_NAME(Symbol)(PRTLDRMODELF pModElf, Elf_Addr BaseAddr, PFNRTLDRIMPORT pfnGetImport, void *pvUser,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Elf_Size iSym, const Elf_Sym **ppSym, Elf_Addr *pSymValue)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Validate and find the symbol.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgFailed(("iSym=%d is an invalid symbol index!\n", iSym));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgFailed(("iSym=%d st_name=%d str sh_size=%d\n", iSym, pSym->st_name, pModElf->cbStr));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const char *pszName = ELF_STR(pModElf, pSym->st_name);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Determine the symbol value.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Symbols needs different treatment depending on which section their are in.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Undefined and absolute symbols goes into special non-existing sections.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Undefined symbol, needs resolving.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Since ELF has no generic concept of importing from specific module (the OS/2 ELF format
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * has but that's a OS extension and only applies to programs and dlls), we'll have to ask
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * the resolver callback to do a global search.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* Try to resolve the symbol. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync int rc = pfnGetImport(&pModElf->Core, "", pszName, ~0, &Value, pvUser);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgFailed(("Failed to resolve '%s' rc=%Rrc\n", pszName, rc));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgFailed(("Symbol value overflowed! '%s'\n", pszName));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log2(("rtldrELF: #%-3d - UNDEF " FMT_ELF_ADDR " '%s'\n", iSym, *pSymValue, pszName));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Absolute symbols needs no fixing since they are, well, absolute.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log2(("rtldrELF: #%-3d - ABS " FMT_ELF_ADDR " '%s'\n", iSym, *pSymValue, pszName));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * All other symbols are addressed relative to their section and need to be fixed up.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* what about common symbols? */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync ("iSym=%d st_shndx=%d e_shnum=%d pszName=%s\n", iSym, pSym->st_shndx, pModElf->Ehdr.e_shnum, pszName));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync *pSymValue = pSym->st_value + pModElf->paShdrs[pSym->st_shndx].sh_addr + BaseAddr;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log2(("rtldrELF: #%-3d - %5d " FMT_ELF_ADDR " '%s'\n", iSym, pSym->st_shndx, *pSymValue, pszName));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Applies the fixups for a sections.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @returns iprt status code.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pModElf The ELF loader module instance data.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param BaseAddr The base address which the module is being fixedup to.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pfnGetImport The callback function to use to resolve imports (aka unresolved externals).
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pvUser User argument to pass to the callback.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param SecAddr The section address. This is the address the relocations are relative to.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param cbSec The section size. The relocations must be inside this.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pu8SecBaseR Where we read section bits from.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pu8SecBaseW Where we write section bits to.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pvRelocs Pointer to where we read the relocations from.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param cbRelocs Size of the relocations.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic int RTLDRELF_NAME(RelocateSection)(PRTLDRMODELF pModElf, Elf_Addr BaseAddr, PFNRTLDRIMPORT pfnGetImport, void *pvUser,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const Elf_Addr SecAddr, Elf_Size cbSec, const uint8_t *pu8SecBaseR, uint8_t *pu8SecBaseW,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Iterate the relocations.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * The relocations are stored in an array of Elf32_Rel records and covers the entire relocation section.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const Elf_Reloc *paRels = (const Elf_Reloc *)pvRelocs;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const unsigned iRelMax = (unsigned)(cbRelocs / sizeof(paRels[0]));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn(iRelMax == cbRelocs / sizeof(paRels[0]), (FMT_ELF_SIZE "\n", cbRelocs / sizeof(paRels[0])), VERR_IMAGE_TOO_BIG);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Get the symbol.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync int rc = RTLDRELF_NAME(Symbol)(pModElf, BaseAddr, pfnGetImport, pvUser, ELF_R_SYM(paRels[iRel].r_info), &pSym, &SymValue);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log3(("rtldrELF: " FMT_ELF_ADDR " %02x %06x - " FMT_ELF_ADDR " %3d %02x %s\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync paRels[iRel].r_offset, ELF_R_TYPE(paRels[iRel].r_info), (unsigned)ELF_R_SYM(paRels[iRel].r_info),
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync SymValue, (unsigned)pSym->st_shndx, pSym->st_info, ELF_STR(pModElf, pSym->st_name)));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Apply the fixup.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn(paRels[iRel].r_offset < cbSec, (FMT_ELF_ADDR " " FMT_ELF_SIZE "\n", paRels[iRel].r_offset, cbSec), VERR_LDRELF_INVALID_RELOCATION_OFFSET);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const Elf_Addr *pAddrR = (const Elf_Addr *)(pu8SecBaseR + paRels[iRel].r_offset); /* Where to read the addend. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Elf_Addr *pAddrW = (Elf_Addr *)(pu8SecBaseW + paRels[iRel].r_offset); /* Where to write the fixup. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Absolute addressing.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log4((FMT_ELF_ADDR": R_386_32 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync SecAddr + paRels[iRel].r_offset + BaseAddr, Value, SymValue));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * PC relative addressing.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const Elf_Addr SourceAddr = SecAddr + paRels[iRel].r_offset + BaseAddr; /* Where the source really is. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const Elf_Addr Value = SymValue + *(uint32_t *)pAddrR - SourceAddr;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log4((FMT_ELF_ADDR": R_386_PC32 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* ignore */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Absolute addressing
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const Elf_Addr Value = SymValue + paRels[iRel].r_addend;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log4((FMT_ELF_ADDR": R_X86_64_64 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync SecAddr + paRels[iRel].r_offset + BaseAddr, Value, SymValue));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Truncated 32-bit value (zero-extendedable to the 64-bit value).
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const Elf_Addr Value = SymValue + paRels[iRel].r_addend;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log4((FMT_ELF_ADDR": R_X86_64_32 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync SecAddr + paRels[iRel].r_offset + BaseAddr, Value, SymValue));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn((Elf_Addr)*(uint32_t *)pAddrW == Value, ("Value=" FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Truncated 32-bit value (sign-extendedable to the 64-bit value).
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const Elf_Addr Value = SymValue + paRels[iRel].r_addend;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log4((FMT_ELF_ADDR": R_X86_64_32S Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync SecAddr + paRels[iRel].r_offset + BaseAddr, Value, SymValue));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn((Elf_Addr)*(int32_t *)pAddrW == Value, ("Value=" FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG); /** @todo check the sign-extending here. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * PC relative addressing.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const Elf_Addr SourceAddr = SecAddr + paRels[iRel].r_offset + BaseAddr; /* Where the source really is. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const Elf_Addr Value = SymValue + paRels[iRel].r_addend - SourceAddr;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log4((FMT_ELF_ADDR": R_X86_64_PC32 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn((Elf_Addr)*(int32_t *)pAddrW == Value, ("Value=" FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG); /** @todo check the sign-extending here. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* ignore */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgFailed(("Unknown relocation type: %d (iRel=%d iRelMax=%d)\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::pfnClose */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(Close)(PRTLDRMODINTERNAL pMod)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::Done */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(Done)(PRTLDRMODINTERNAL pMod)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync NOREF(pMod); /*PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;*/
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** @todo Have to think more about this .... */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::EnumSymbols */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(EnumSymbols)(PRTLDRMODINTERNAL pMod, unsigned fFlags, const void *pvBits, RTUINTPTR BaseAddress,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Validate the input.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn((RTUINTPTR)BaseAddr == BaseAddress, ("#RTptr", BaseAddress), VERR_IMAGE_BASE_TOO_HIGH);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Make sure we've got the string and symbol tables. (We don't need the pvBits.)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Enumerate the symbol table.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Skip imports (undefined).
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Calc value and get name.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* absolute symbols are not subject to any relocation. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync else if (paSyms[iSym].st_shndx < pModElf->Ehdr.e_shnum)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* relative to the section. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Value = BaseAddr + paSyms[iSym].st_value + pModElf->paShdrs[paSyms[iSym].st_shndx].sh_addr;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgFailed(("Arg! paSyms[%u].st_shndx=" FMT_ELF_HALF "\n", iSym, paSyms[iSym].st_shndx));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const char *pszName = ELF_STR(pModElf, paSyms[iSym].st_name);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync || ELF_ST_BIND(paSyms[iSym].st_info) == STB_GLOBAL)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Call back.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn(Value == (RTUINTPTR)Value, (FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync rc = pfnCallback(pMod, pszName, ~0, (RTUINTPTR)Value, pvUser);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::GetImageSize */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(size_t) RTLDRELF_NAME(GetImageSize)(PRTLDRMODINTERNAL pMod)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::GetBits */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(GetBits)(PRTLDRMODINTERNAL pMod, void *pvBits, RTUINTPTR BaseAddress, PFNRTLDRIMPORT pfnGetImport, void *pvUser)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * This operation is currently only available on relocatable images.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Executable images are not supported yet!\n", pModElf->pReader->pfnLogName(pModElf->pReader)));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Dynamic images are not supported yet!\n", pModElf->pReader->pfnLogName(pModElf->pReader)));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Load the bits into pvBits.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync for (unsigned iShdr = 0; iShdr < pModElf->Ehdr.e_shnum; iShdr++)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn((size_t)paShdrs[iShdr].sh_size == (size_t)paShdrs[iShdr].sh_size, (FMT_ELF_SIZE "\n", paShdrs[iShdr].sh_size), VERR_IMAGE_TOO_BIG);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync memset((uint8_t *)pvBits + paShdrs[iShdr].sh_addr, 0, (size_t)paShdrs[iShdr].sh_size);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync int rc = pModElf->pReader->pfnRead(pModElf->pReader, (uint8_t *)pvBits + paShdrs[iShdr].sh_addr,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync (size_t)paShdrs[iShdr].sh_size, paShdrs[iShdr].sh_offset);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Read error when reading " FMT_ELF_SIZE " bytes at " FMT_ELF_OFF ", iShdr=%d\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync paShdrs[iShdr].sh_size, paShdrs[iShdr].sh_offset, iShdr));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Relocate the image.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync return pModElf->Core.pOps->pfnRelocate(pMod, pvBits, BaseAddress, ~(RTUINTPTR)0, pfnGetImport, pvUser);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::Relocate */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(Relocate)(PRTLDRMODINTERNAL pMod, void *pvBits, RTUINTPTR NewBaseAddress,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync RTUINTPTR OldBaseAddress, PFNRTLDRIMPORT pfnGetImport, void *pvUser)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const char *pszLogName = pModElf->pReader->pfnLogName(pModElf->pReader);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * This operation is currently only available on relocatable images.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Executable images are not supported yet!\n", pszLogName));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Dynamic images are not supported yet!\n", pszLogName));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Validate the input.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn((RTUINTPTR)BaseAddr == NewBaseAddress, ("#RTptr", NewBaseAddress), VERR_IMAGE_BASE_TOO_HIGH);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Map the image bits if not already done and setup pointer into it.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Iterate the sections looking for interesting SHT_REL[A] sections.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * SHT_REL[A] sections have the section index of the section they contain fixups
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * for in the sh_info member.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log2(("rtLdrElf: %s: Fixing up image\n", pszLogName));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync for (unsigned iShdr = 0; iShdr < pModElf->Ehdr.e_shnum; iShdr++)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Skip sections without interest to us.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const Elf_Shdr *pShdr = &paShdrs[pShdrRel->sh_info]; /* the section to fixup. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Relocate the section.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log2(("rtldrELF: %s: Relocation records for #%d [%s] (sh_info=%d sh_link=%d) found in #%d [%s] (sh_info=%d sh_link=%d)\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pszLogName, (int)pShdrRel->sh_info, ELF_STR(pModElf, pShdr->sh_name), (int)pShdr->sh_info, (int)pShdr->sh_link,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync iShdr, ELF_STR(pModElf, pShdrRel->sh_name), (int)pShdrRel->sh_info, (int)pShdrRel->sh_link));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** @todo Make RelocateSection a function pointer so we can select the one corresponding to the machine when opening the image. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync rc = RTLDRELF_NAME(RelocateSection)(pModElf, BaseAddr, pfnGetImport, pvUser,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync (const uint8_t *)pModElf->pvBits + pShdr->sh_offset,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync (const uint8_t *)pModElf->pvBits + pShdrRel->sh_offset,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::pfnGetSymbolEx */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(GetSymbolEx)(PRTLDRMODINTERNAL pMod, const void *pvBits, RTUINTPTR BaseAddress, const char *pszSymbol, RTUINTPTR *pValue)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Validate the input.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn((RTUINTPTR)BaseAddr == BaseAddress, ("#RTptr", BaseAddress), VERR_IMAGE_BASE_TOO_HIGH);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Map the image bits if not already done and setup pointer into it.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Calc all kinds of pointers before we start iterating the symbol table.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* Undefined symbols are not exports, they are imports. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync && ( ELF_ST_BIND(paSyms[iSym].st_info) == STB_GLOBAL
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* Validate the name string and try match with it. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync if (!strcmp(pszSymbol, pStr + paSyms[iSym].st_name))
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* matched! */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* absolute symbols are not subject to any relocation. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync else if (paSyms[iSym].st_shndx < pModElf->Ehdr.e_shnum)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* relative to the section. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Value = BaseAddr + paSyms[iSym].st_value + pModElf->paShdrs[paSyms[iSym].st_shndx].sh_addr;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgFailed(("Arg. paSyms[iSym].st_shndx=%d\n", paSyms[iSym].st_shndx));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn(Value == (RTUINTPTR)Value, (FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgFailed(("String outside string table! iSym=%d paSyms[iSym].st_name=%#x\n", iSym, paSyms[iSym].st_name));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::pfnEnumDbgInfo */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(EnumDbgInfo)(PRTLDRMODINTERNAL pMod, const void *pvBits,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync return VERR_NOT_IMPLEMENTED; NOREF(pModElf); NOREF(pfnCallback); NOREF(pvUser);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::pfnEnumSegments. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(EnumSegments)(PRTLDRMODINTERNAL pMod, PFNRTLDRENUMSEGS pfnCallback, void *pvUser)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync return VERR_NOT_IMPLEMENTED; NOREF(pModElf); NOREF(pfnCallback); NOREF(pvUser);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::pfnLinkAddressToSegOffset. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(LinkAddressToSegOffset)(PRTLDRMODINTERNAL pMod, RTLDRADDR LinkAddress,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync return VERR_NOT_IMPLEMENTED; NOREF(pModElf); NOREF(LinkAddress); NOREF(piSeg); NOREF(poffSeg);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::pfnLinkAddressToRva. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(LinkAddressToRva)(PRTLDRMODINTERNAL pMod, RTLDRADDR LinkAddress, PRTLDRADDR pRva)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync return VERR_NOT_IMPLEMENTED; NOREF(pModElf); NOREF(LinkAddress); NOREF(pRva);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::pfnSegOffsetToRva. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(SegOffsetToRva)(PRTLDRMODINTERNAL pMod, uint32_t iSeg, RTLDRADDR offSeg,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync return VERR_NOT_IMPLEMENTED; NOREF(pModElf); NOREF(iSeg); NOREF(offSeg); NOREF(pRva);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/** @copydoc RTLDROPS::pfnRvaToSegOffset. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic DECLCALLBACK(int) RTLDRELF_NAME(RvaToSegOffset)(PRTLDRMODINTERNAL pMod, RTLDRADDR Rva,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync return VERR_NOT_IMPLEMENTED; NOREF(pModElf); NOREF(Rva); NOREF(piSeg); NOREF(poffSeg);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * The ELF module operations.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Validates the ELF header.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @returns iprt status code.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pEhdr Pointer to the ELF header.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pszLogName The log name.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param cbRawImage The size of the raw image.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic int RTLDRELF_NAME(ValidateElfHeader)(const Elf_Ehdr *pEhdr, const char *pszLogName, uint64_t cbRawImage,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync RT_ELEMENTS(pEhdr->e_ident), &pEhdr->e_ident[0], pEhdr->e_type, pEhdr->e_version,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pEhdr->e_entry, pEhdr->e_phoff, pEhdr->e_shoff,pEhdr->e_flags, pEhdr->e_ehsize, pEhdr->e_phentsize,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pEhdr->e_phnum, pEhdr->e_shentsize, pEhdr->e_shnum, pEhdr->e_shstrndx));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Invalid ELF magic (%.*Rhxs)\n", pszLogName, sizeof(pEhdr->e_ident), pEhdr->e_ident)); NOREF(pszLogName);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync if (pEhdr->e_ident[EI_CLASS] != RTLDRELF_SUFF(ELFCLASS))
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Invalid ELF class (%.*Rhxs)\n", pszLogName, sizeof(pEhdr->e_ident), pEhdr->e_ident));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: ELF endian %x is unsupported\n", pEhdr->e_ident[EI_DATA]));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: ELF version %x is unsupported\n", pEhdr->e_version));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Elf header e_ehsize is %d expected %d!\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Elf header e_phentsize is %d expected %d!\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pszLogName, pEhdr->e_phentsize, sizeof(Elf_Phdr)));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Elf header e_shentsize is %d expected %d!\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pszLogName, pEhdr->e_shentsize, sizeof(Elf_Shdr)));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: image type %#x is not supported!\n", pszLogName, pEhdr->e_type));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: machine type %u is not supported!\n", pEhdr->e_machine));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: The program headers overlap with the ELF header! e_phoff=" FMT_ELF_OFF "\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync if ( pEhdr->e_phoff + pEhdr->e_phnum * pEhdr->e_phentsize > cbRawImage
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync || pEhdr->e_phoff + pEhdr->e_phnum * pEhdr->e_phentsize < pEhdr->e_phoff)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: The program headers extends beyond the file! e_phoff=" FMT_ELF_OFF " e_phnum=" FMT_ELF_HALF "\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: The section headers overlap with the ELF header! e_shoff=" FMT_ELF_OFF "\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync if ( pEhdr->e_shoff + pEhdr->e_shnum * pEhdr->e_shentsize > cbRawImage
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync || pEhdr->e_shoff + pEhdr->e_shnum * pEhdr->e_shentsize < pEhdr->e_shoff)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: The section headers extends beyond the file! e_shoff=" FMT_ELF_OFF " e_shnum=" FMT_ELF_HALF "\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Gets the section header name.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @returns pszName.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pReader The loader reader instance.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pEhdr The elf header.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param offName The offset of the section header name.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pszName Where to store the name.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param cbName The size of the buffer pointed to by pszName.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncconst char *RTLDRELF_NAME(GetSHdrName)(PRTLDRMODELF pModElf, Elf_Word offName, char *pszName, size_t cbName)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync RTFOFF off = pModElf->paShdrs[pModElf->Ehdr.e_shstrndx].sh_offset + offName;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync int rc = pModElf->pReader->pfnRead(pModElf->pReader, pszName, cbName - 1, off);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* read by for byte. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync rc = pModElf->pReader->pfnRead(pModElf->pReader, pszName + i, 1, off);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Validates a section header.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @returns iprt status code.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pModElf Pointer to the module structure.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param iShdr The index of section header which should be validated.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * The section headers are found in the pModElf->paShdrs array.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pszLogName The log name.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param cbRawImage The size of the raw image.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic int RTLDRELF_NAME(ValidateSectionHeader)(PRTLDRMODELF pModElf, unsigned iShdr, const char *pszLogName, RTFOFF cbRawImage)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pShdr->sh_name, RTLDRELF_NAME(GetSHdrName)(pModElf, pShdr->sh_name, szSectionName, sizeof(szSectionName)),
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pShdr->sh_type, rtldrElfGetShdrType(pShdr->sh_type), pShdr->sh_flags, pShdr->sh_addr,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pShdr->sh_offset, pShdr->sh_size, pShdr->sh_link, pShdr->sh_info, pShdr->sh_addralign,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Shdr #%d: sh_link (%d) is beyond the end of the section table (%d)!\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pszLogName, iShdr, pShdr->sh_link, pModElf->Ehdr.e_shnum)); NOREF(pszLogName);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /** @todo find specs and check up which sh_info fields indicates section table entries */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync case 12301230:
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Shdr #%d: sh_info (%d) is beyond the end of the section table (%d)!\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pszLogName, iShdr, pShdr->sh_link, pModElf->Ehdr.e_shnum));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * For these types sh_info doesn't have any special meaning, or anything which
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * we need/can validate now.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Warning, unknown type %d!\n", pszLogName, pShdr->sh_type));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Shdr #%d: sh_offset (" FMT_ELF_OFF ") + sh_size (" FMT_ELF_XWORD " = %RTfoff) is beyond the end of the file (%RTfoff)!\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pszLogName, iShdr, pShdr->sh_offset, pShdr->sh_size, offEnd, cbRawImage));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrELF: %s: Shdr #%d: sh_offset (" FMT_ELF_OFF ") + sh_size (" FMT_ELF_XWORD ") is starting in the ELF header!\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pszLogName, iShdr, pShdr->sh_offset, pShdr->sh_size, cbRawImage));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Opens an ELF image, fixed bitness.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @returns iprt status code.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param pReader The loader reader instance which will provide the raw image bits.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param fFlags Reserved, MBZ.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param enmArch Architecture specifier.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * @param phLdrMod Where to store the handle.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsyncstatic int RTLDRELF_NAME(Open)(PRTLDRREADER pReader, uint32_t fFlags, RTLDRARCH enmArch, PRTLDRMOD phLdrMod)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync const char *pszLogName = pReader->pfnLogName(pReader);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Create the loader module instance.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync PRTLDRMODELF pModElf = (PRTLDRMODELF)RTMemAllocZ(sizeof(*pModElf));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync //pModElf->pvBits = NULL;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync //pModElf->Ehdr = {0};
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync //pModElf->paShdrs = NULL;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync //pModElf->paSyms = NULL;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync //pModElf->pStr = NULL;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Read and validate the ELF header and match up the CPU architecture.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync int rc = pReader->pfnRead(pReader, &pModElf->Ehdr, sizeof(pModElf->Ehdr), 0);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync RTLDRARCH enmArchImage = RTLDRARCH_INVALID; /* shut up gcc */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync rc = RTLDRELF_NAME(ValidateElfHeader)(&pModElf->Ehdr, pszLogName, cbRawImage, &enmArchImage);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Read the section headers.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Elf_Shdr *paShdrs = (Elf_Shdr *)RTMemAlloc(pModElf->Ehdr.e_shnum * sizeof(Elf_Shdr));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync rc = pReader->pfnRead(pReader, paShdrs, pModElf->Ehdr.e_shnum * sizeof(Elf_Shdr),
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Validate the section headers, allocate memory for the sections (determine the image size),
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * and find relevant sections.
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync for (unsigned i = 0; i < pModElf->Ehdr.e_shnum; i++)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync rc = RTLDRELF_NAME(ValidateSectionHeader)(pModElf, i, pszLogName, cbRawImage);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* Allocate memory addresses for the section. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync ? RT_ALIGN_T(pModElf->cbImage, paShdrs[i].sh_addralign, Elf_Addr)
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pModElf->cbImage = (size_t)paShdrs[i].sh_addr + (size_t)paShdrs[i].sh_size;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertMsgReturn(pModElf->cbImage == paShdrs[i].sh_addr + paShdrs[i].sh_size,
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync (FMT_ELF_ADDR "\n", paShdrs[i].sh_addr + paShdrs[i].sh_size),
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log2(("RTLdrElf: %s: Assigned " FMT_ELF_ADDR " to section #%d\n", pszLogName, paShdrs[i].sh_addr, i));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync /* We're looking for symbol tables. */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log(("RTLdrElf: %s: Multiple symbol tabs! iSymSh=%d i=%d\n", pszLogName, pModElf->iSymSh, i));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pModElf->cSyms = (unsigned)(paShdrs[i].sh_size / sizeof(Elf_Sym));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertReturn(pModElf->cSyms == paShdrs[i].sh_size / sizeof(Elf_Sym), VERR_IMAGE_TOO_BIG);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pModElf->cbStr = (unsigned)paShdrs[pModElf->iStrSh].sh_size;
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync AssertReturn(pModElf->cbStr == paShdrs[pModElf->iStrSh].sh_size, VERR_IMAGE_TOO_BIG);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync } /* for each section header */
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync Log2(("RTLdrElf: iSymSh=%u cSyms=%u iStrSh=%u cbStr=%u rc=%Rrc cbImage=%#zx\n",
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pModElf->iSymSh, pModElf->cSyms, pModElf->iStrSh, pModElf->cbStr, rc, pModElf->cbImage));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * Are the section headers fine?
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync * We require there to be symbol & string tables (at least for the time being).
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync pModElf->Core.pOps = &RTLDRELF_MID(s_rtldrElf,Ops);
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync LogFlow(("%s: %s: returns VINF_SUCCESS *phLdrMod=%p\n", __FUNCTION__, pszLogName, *phLdrMod));
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync/*******************************************************************************
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync* Cleanup Constants And Macros *
cabde247f900dcf6e58d009bbdd15099c028c6fcvboxsync*******************************************************************************/