............................Contents


Preface	xiii
1. Introduction	1
...Link-Editing	2
...Runtime Linking	3
......Dynamic Executables	3
......Shared Objects	4
...Related Topics	4
......Dynamic Linking	4
......Application Binary Interfaces	5
......Support Tools	5
2. Link-Editor	7
...Overview	7
...Invoking the Link-Editor	8
......Direct Invocation	9
......Using a Compiler Driver	9


...Specifying the Link-Editor Options	10
...Input File Processing	11
......Archive Processing	12
......Shared Object Processing	13
......Linking with Additional Libraries	14
......Initialization and Termination Sections	19
...Symbol Processing	21
......Symbol Resolution	21
......Undefined Symbols	27
......Tentative Symbol Order Within the Output File	31
......Defining Additional Symbols	32
......Reducing Symbol Scope	37
...Generating the Output Image	42
...Link-Editor Support Interface	43
......Invoking the Support Interface	43
......Support Interface Functions	44
......Support Interface Example	46
...Debugging Aids	48
3. Runtime Linker	53
...Overview	53
...Locating Shared Object Dependencies	54
......Directories Searched by the Runtime Linker	55
...Relocation Processing	57
......Symbol Lookup	59


......When Relocations are Performed	60
......Relocation Errors	61
...Loading Additional Objects	62
...Initialization and Termination Routines	64
...Security	64
...Runtime Linking Programming Interface	65
......Loading Additional Objects	67
......Relocation Processing	69
......Obtaining New Symbols	73
...Debugging Aids	77
4. Shared Objects	83
...Overview	83
...Naming Conventions	84
......Recording a Shared Object Name	86
...Shared Objects with Dependencies	89
...Dependency Ordering	90
...Shared Objects as Filters	91
......Generating a Standard Filter	92
......Generating an Auxiliary Filter	95
... Performance Considerations	96
......Useful Tools	97
......The Underlying System	100
......Position-Independent Code	100
......Maximizing Shareability	102


......Minimizing Paging Activity	105
......Relocations	106
......Profiling Shared Objects	111
5. Versioning	115
...Overview	115
...Interface Compatibility	116
...Internal Versioning	117
......Creating a Version Definition	118
......Binding to a Version Definition	126
......Specifying a Version Binding	132
......Relocatable Objects	135
...External Versioning	135
......Coordination of Versioned Filenames	136
6. Object Files	139
...Introduction	139
...File Format	140
......Data Representation	141
......ELF Header	142
......ELF Identification	146
......Sections	148
......Special Sections	157
......String Table	161
......Symbol Table	162
......Relocation	167


......Versioning Information	181
......Note Section	187
...Dynamic Linking	189
......Program Header	189
......Program Loading (Processor-Specific)	195
......Runtime Linker	205
......Hash Table	224
......Initialization and Termination Functions	225
7. Mapfile Option	227
...Introduction	227
...Using the Mapfile Option	228
...Mapfile Structure and Syntax	228
......Segment Declarations	229
......Mapping Directives	233
......Size-Symbol Declarations	236
......File Control Directives	236
...Mapping Example	236
...Mapfile Option Defaults	239
...Internal Map Structure	240
...Error Messages	243
......Warnings	243
......Fatal Errors	244
A. Link-Editor Quick Reference	245
...Static Mode	245


......Building a Relocatable Object	246
......Building a Static Executable	246
...Dynamic Mode	246
......Building a Shared Object	246
......Building a Dynamic Executable	248
B. Versioning Quick Reference	249
...Naming Conventions	250
...Defining a Shared Object's Interface	251
...Versioning a Shared Object	252
......Versioning an Existing (Non-versioned) Shared Object	253
...Updating a Versioned Shared Object	253
......Adding New Symbols	254
......Internal Implementation Changes	255
......New Symbols and Internal Implementation Changes	255
......Migrating Symbols to a Standard Interface	256
Index	261