Computer Systems: A Programmer's Perspective (3rd Edition)
3rd Edition
ISBN: 9780134092669
Author: Bryant, Randal E. Bryant, David R. O'Hallaron, David R., Randal E.; O'Hallaron, Bryant/O'hallaron
Publisher: PEARSON
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Question
Chapter 7.5, Problem 7.1PP
Program Plan Intro
Sections in relocatable object files:
There are many sections in a relocatable object file. They are given below:
- “.text”:
- It is the machine code of the compiled program.
- “.rodata”:
- This section is used to read only the data in the format such as
- Strings in “printf” statements.
- Jump tables for switch statements.
- This section is used to read only the data in the format such as
- “.data”:
- This section is used in the initialized “C” variables of global variable and static “C” variables.
- Local “C” variables are initialized at execution time on the stack.
- It does not show in either the “.data” or “.bss” sections.
- “.bss”:
- It is used in the uninitialized global and static “C” variables, along with any global or static variables that are assigned to zero.
- “.symtab”:
- It is a symbol table.
- It contains the information about functions and global variables that are defined and referenced in the program.
- “.rel.text”:
- This section contains a list of locations in the “.text” section.
- It will require to be changed once the linker merges this object file with others.
- This section contains a list of locations in the “.text” section.
- “.rel.data”:
- This section contains relocation information for any global variables that are referenced or defined by the module.
- “.debug”:
- It is a symbol table for debugging
- It contains entries for following
- Definition of Local variables, global variables and typedefs variables and original “C” source file.
- “.line”:
- It is a mapping between line numbers in the given program
- That is in original “C” source program and machine code instructions in the “.text” section.
- It is a mapping between line numbers in the given program
- “.strtab”:
- It is a string table.
- It contains symbol tables in the “.symtab” and “.debug” sections.
- It is the table for section names in the section headers.
- It is a string table.
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Chapter 7 Solutions
Computer Systems: A Programmer's Perspective (3rd Edition)
Ch. 7.5 - Prob. 7.1PPCh. 7.6 - Practice Problem 7.2 (solution page 718) In this...Ch. 7.6 - Practice Problem 7.3 (solution page 718) Let a and...Ch. 7.7 - Prob. 7.4PPCh. 7.7 - Prob. 7.5PPCh. 7 - This problem concerns the m. o module from Figure...Ch. 7 - Without changing any variable names, modify bar5.c...Ch. 7 - Prob. 7.8HWCh. 7 - Consider the following program, which consists of...Ch. 7 - Let a and b denote object modules or static...
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