| 1 | /* $Id: ldrELF.cpp 5421 2007-10-21 21:02:00Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * innotek Portable Runtime - Binary Image Loader, Executable and Linker Format (ELF).
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2007 innotek GmbH
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License as published by the Free Software Foundation,
|
|---|
| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
|
|---|
| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
|
|---|
| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | */
|
|---|
| 17 |
|
|---|
| 18 |
|
|---|
| 19 | /*******************************************************************************
|
|---|
| 20 | * Header Files *
|
|---|
| 21 | *******************************************************************************/
|
|---|
| 22 | #define LOG_GROUP RTLOGGROUP_LDR
|
|---|
| 23 | #include <iprt/ldr.h>
|
|---|
| 24 | #include <iprt/alloc.h>
|
|---|
| 25 | #include <iprt/assert.h>
|
|---|
| 26 | #include <iprt/string.h>
|
|---|
| 27 | #include <iprt/log.h>
|
|---|
| 28 | #include <iprt/err.h>
|
|---|
| 29 | #include "internal/ldrELF32.h"
|
|---|
| 30 | #include "internal/ldrELF64.h"
|
|---|
| 31 | #include "internal/ldrELFi386.h"
|
|---|
| 32 | #include "internal/ldrELFAmd64.h"
|
|---|
| 33 | #include "internal/ldr.h"
|
|---|
| 34 |
|
|---|
| 35 |
|
|---|
| 36 |
|
|---|
| 37 | /*******************************************************************************
|
|---|
| 38 | * Defined Constants And Macros *
|
|---|
| 39 | *******************************************************************************/
|
|---|
| 40 | /** Finds an ELF string. */
|
|---|
| 41 | #define ELF_STR(pHdrs, iStr) ((pHdrs)->pStr + (iStr))
|
|---|
| 42 |
|
|---|
| 43 |
|
|---|
| 44 |
|
|---|
| 45 | /*******************************************************************************
|
|---|
| 46 | * Internal Functions *
|
|---|
| 47 | *******************************************************************************/
|
|---|
| 48 | #ifdef LOG_ENABLED
|
|---|
| 49 | static const char *rtldrElfGetShdrType(uint32_t iType);
|
|---|
| 50 | #endif
|
|---|
| 51 |
|
|---|
| 52 |
|
|---|
| 53 | /* Select ELF mode and include the template. */
|
|---|
| 54 | #define ELF_MODE 32
|
|---|
| 55 | #define Elf_Reloc Elf_Rel
|
|---|
| 56 | #include "ldrELFRelocatable.cpp.h"
|
|---|
| 57 | #undef ELF_MODE
|
|---|
| 58 | #undef Elf_Reloc
|
|---|
| 59 |
|
|---|
| 60 |
|
|---|
| 61 | #define ELF_MODE 64
|
|---|
| 62 | #define Elf_Reloc Elf_Rela
|
|---|
| 63 | #include "ldrELFRelocatable.cpp.h"
|
|---|
| 64 | #undef ELF_MODE
|
|---|
| 65 | #undef Elf_Reloc
|
|---|
| 66 |
|
|---|
| 67 |
|
|---|
| 68 | #ifdef LOG_ENABLED
|
|---|
| 69 | /**
|
|---|
| 70 | * Gets the section type.
|
|---|
| 71 | *
|
|---|
| 72 | * @returns Pointer to read only string.
|
|---|
| 73 | * @param iType The section type index.
|
|---|
| 74 | */
|
|---|
| 75 | static const char *rtldrElfGetShdrType(uint32_t iType)
|
|---|
| 76 | {
|
|---|
| 77 | switch (iType)
|
|---|
| 78 | {
|
|---|
| 79 | case SHT_NULL: return "SHT_NULL";
|
|---|
| 80 | case SHT_PROGBITS: return "SHT_PROGBITS";
|
|---|
| 81 | case SHT_SYMTAB: return "SHT_SYMTAB";
|
|---|
| 82 | case SHT_STRTAB: return "SHT_STRTAB";
|
|---|
| 83 | case SHT_RELA: return "SHT_RELA";
|
|---|
| 84 | case SHT_HASH: return "SHT_HASH";
|
|---|
| 85 | case SHT_DYNAMIC: return "SHT_DYNAMIC";
|
|---|
| 86 | case SHT_NOTE: return "SHT_NOTE";
|
|---|
| 87 | case SHT_NOBITS: return "SHT_NOBITS";
|
|---|
| 88 | case SHT_REL: return "SHT_REL";
|
|---|
| 89 | case SHT_SHLIB: return "SHT_SHLIB";
|
|---|
| 90 | case SHT_DYNSYM: return "SHT_DYNSYM";
|
|---|
| 91 | default:
|
|---|
| 92 | return "";
|
|---|
| 93 | }
|
|---|
| 94 | }
|
|---|
| 95 | #endif
|
|---|
| 96 |
|
|---|
| 97 |
|
|---|
| 98 | /**
|
|---|
| 99 | * Open an ELF image.
|
|---|
| 100 | *
|
|---|
| 101 | * @returns iprt status code.
|
|---|
| 102 | * @param pReader The loader reader instance which will provide the raw image bits.
|
|---|
| 103 | * @param phLdrMod Where to store the handle.
|
|---|
| 104 | */
|
|---|
| 105 | int rtldrELFOpen(PRTLDRREADER pReader, PRTLDRMOD phLdrMod)
|
|---|
| 106 | {
|
|---|
| 107 | const char *pszLogName = pReader->pfnLogName(pReader); NOREF(pszLogName);
|
|---|
| 108 |
|
|---|
| 109 | /*
|
|---|
| 110 | * Read the ident to decide if this is 32-bit or 64-bit
|
|---|
| 111 | * and worth dealing with.
|
|---|
| 112 | */
|
|---|
| 113 | uint8_t e_ident[EI_NIDENT];
|
|---|
| 114 | int rc = pReader->pfnRead(pReader, &e_ident, sizeof(e_ident), 0);
|
|---|
| 115 | if (RT_FAILURE(rc))
|
|---|
| 116 | return rc;
|
|---|
| 117 | if ( e_ident[EI_MAG0] != ELFMAG0
|
|---|
| 118 | || e_ident[EI_MAG1] != ELFMAG1
|
|---|
| 119 | || e_ident[EI_MAG2] != ELFMAG2
|
|---|
| 120 | || e_ident[EI_MAG3] != ELFMAG3
|
|---|
| 121 | || ( e_ident[EI_CLASS] != ELFCLASS32
|
|---|
| 122 | && e_ident[EI_CLASS] != ELFCLASS64)
|
|---|
| 123 | )
|
|---|
| 124 | {
|
|---|
| 125 | Log(("RTLdrELF: %s: Unsupported/invalid ident %.*Rhxs\n", pszLogName, sizeof(e_ident), e_ident));
|
|---|
| 126 | return VERR_BAD_EXE_FORMAT;
|
|---|
| 127 | }
|
|---|
| 128 | if (e_ident[EI_DATA] != ELFDATA2LSB)
|
|---|
| 129 | {
|
|---|
| 130 | Log(("RTLdrELF: %s: ELF endian %x is unsupported\n", e_ident[EI_DATA]));
|
|---|
| 131 | return VERR_LDRELF_ODD_ENDIAN;
|
|---|
| 132 | }
|
|---|
| 133 | if (e_ident[EI_CLASS] == ELFCLASS32)
|
|---|
| 134 | rc = rtldrELF32Open(pReader, phLdrMod);
|
|---|
| 135 | else
|
|---|
| 136 | rc = rtldrELF64Open(pReader, phLdrMod);
|
|---|
| 137 | return rc;
|
|---|
| 138 | }
|
|---|
| 139 |
|
|---|
