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1 /*
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2 * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.debugger.posix.elf;
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26
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27 public interface ELFSectionHeader {
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28 /** Undefined section header index. */
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29 public static final int NDX_UNDEFINED = 0;
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30 /** Lower bound section header index. */
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31 public static final int NDX_LORESERVE = 0xff00;
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32 /** Lower bound section header index reserved for processor specific
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33 * semantics. */
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34 public static final int NDX_LOPROC = 0xff00;
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35 /** Upper bound section header index reserved for processor specific
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36 * semantics. */
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37 public static final int NDX_HIPROC = 0xff1f;
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38 /** Absolute values for the corresponding reference. Symbols defined
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39 * relative to section number NDX_ABS have absolute values and are not
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40 * affected by relocation. */
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41 public static final int NDX_ABS = 0xfff1;
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42 /** Symbols defined relative to this section are common symbols, such
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43 * as FORTRAN, COMMON or unallocated C external variables. */
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44 public static final int NDX_COMMON = 0xfff2;
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45 /** Upper bound section header index. */
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46 public static final int NDX_HIRESERVE = 0xffff;
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47
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48 /** Section is inactive. */
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49 public static final int TYPE_NULL = 0;
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50 /** Section holds information defined by the program. */
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51 public static final int TYPE_PROGBITS = 1;
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52 /** Section holds symbol table information for link editing. It may also
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53 * be used to store symbols for dynamic linking. */
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54 public static final int TYPE_SYMTBL = 2;
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55 /** Section holds string table information. */
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56 public static final int TYPE_STRTBL = 3;
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57 /** Section holds relocation entries with explicit addends. */
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58 public static final int TYPE_RELO_EXPLICIT = 4;
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59 /** Section holds symbol hash table. */
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60 public static final int TYPE_HASH = 5;
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61 /** Section holds information for dynamic linking. */
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62 public static final int TYPE_DYNAMIC = 6;
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63 /** Section holds information that marks the file. */
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64 public static final int TYPE_NOTE = 7;
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65 /** Section occupies no space but resembles TYPE_PROGBITS. */
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66 public static final int TYPE_NOBITS = 8;
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67 /** Section holds relocation entries without explicit addends. */
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68 public static final int TYPE_RELO = 9;
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69 /** Section is reserved but has unspecified semantics. */
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70 public static final int TYPE_SHLIB = 10;
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71 /** Section holds a minimum set of dynamic linking symbols. */
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72 public static final int TYPE_DYNSYM = 11;
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73 /** Lower bound section type that contains processor specific semantics. */
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74 public static final int TYPE_LOPROC = 0x70000000;
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75 /** Upper bound section type that contains processor specific semantics. */
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76 public static final int TYPE_HIPROC = 0x7fffffff;
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77 /** Lower bound of the range of indexes reserved for application
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78 * programs. */
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79 public static final int TYPE_LOUSER = 0x80000000;
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80 /** Upper bound of the range of indexes reserved for application
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81 * programs. */
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82 public static final int TYPE_HIUSER = 0xffffffff;
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83
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84 /** Flag informing that this section contains data that should be writable
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85 * during process execution. */
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86 public static final int FLAG_WRITE = 0x1;
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87 /** Flag informing that section occupies memory during process
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88 * execution. */
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89 public static final int FLAG_ALLOC = 0x2;
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90 /** Flag informaing that section contains executable machine
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91 * instructions. */
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92 public static final int FLAG_EXEC_INSTR = 0x4;
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93 /** Flag informing that all the bits in the mask are reserved for processor
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94 * specific semantics. */
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95 public static final int FLAG_MASK = 0xf0000000;
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96
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97 /** Section header name identifying the section as a string table. */
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98 public static final String STRING_TABLE_NAME = ".strtab";
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99 /** Section header name identifying the section as a dynamic string
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100 * table. */
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101 public static final String DYNAMIC_STRING_TABLE_NAME = ".dynstr";
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102 /** Returns the type of section header. */
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103 public int getType();
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104 /** Returns the number of symbols in this section or 0 if none. */
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105 public int getNumberOfSymbols();
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106 /** Returns the symbol at the specified index. The ELF symbol at index 0
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107 * is the undefined symbol. */
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108 public ELFSymbol getELFSymbol(int index);
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109 /** Returns the string table for this section or null if one does not
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110 * exist. */
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111 public ELFStringTable getStringTable();
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112 /** Returns the hash table for this section or null if one does not
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113 * exist. NOTE: currently the ELFHashTable does not work and this method
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114 * will always return null. */
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115 public ELFHashTable getHashTable();
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116 public int getLink();
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117 /** Returns the name of the section or null if the section has no name. */
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118 public String getName();
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119 /** Returns the offset in bytes to the beginning of the section. */
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120 public int getOffset();
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121 }
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