............................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	20
......Symbol Resolution	21
......Undefined Symbols	27
......Tentative Symbol Order Within the Output File	31
......Defining Additional Symbols	32
...Generating the Output Image	33
...Debugging Aids	34
3. Runtime Linker	39
...Overview	39
...Locating Shared Object Dependencies	40
......Directories Searched by the Runtime Linker	40
...Relocation Processing	43
......Symbol Lookup	45
......When Relocations are Performed	46
......Relocation Errors	47
...Adding Additional Objects	48
...Initialization and Termination Routines	50
...Runtime Linking Programming Interface	50


......Adding Additional Objects	52
......Relocation Processing	54
......Obtaining New Symbols	58
...Debugging Aids	62
4. Shared Objects	67
...Overview	67
...Naming Conventions	68
......Recording a Shared Object Name	69
...Versioning	73
......Coordination Of Binding Requirements	74
...Shared Objects With Dependencies	76
...Dependency Ordering	77
...Shared Objects as Filters	78
...Performance Considerations	81
......Useful Tools	81
......The Underlying System	84
......Position-Independent Code	85
......Maximizing Shareability	86
......Minimizing Paging Activity	89
......Relocations	90
5. Object Files	97
...Introduction	97
...File Format	98
......Data Representation	99


...ELF Header	100
......Section Header	106
......String Table	118
......Symbol Table	119
......Relocation	124
...Dynamic Linking	131
......Program Header	132
......Program Loading (Processor-Specific)	140
......Runtime Linker	147
......Hash Table	161
6. Mapfile Option	165
...Introduction	165
...Using the Mapfile Option	166
...Mapfile Structure and Syntax	166
......Segment Declarations	167
......Mapping Directives	171
......Size-Symbol Declarations	173
...Mapping Example	173
...Mapfile Option Defaults	175
...Internal Map Structure	176
...Error Messages	179
......Warnings	179
......Fatal Errors	180
A. Link-Editor Quick Reference	183


...Static Mode	183
......Building a Relocatable Object	184
......Building a Static Executable	184
...Dynamic Mode	184
......Building a Shared Object	184
......Building a Dynamic Executable	185
Index	187