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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Expert Solution & Answer
Chapter 7.7, Problem 7.4PP
A.
Explanation of Solution
Hex address of the relocated reference to “sum”:
From the given Figure 7.12(a), the function “sum” in line 5 is
4004de: e8 05 00 00 00callq 4004e8 <sum>sum()
From the given Figure 7.12(a), the value of “ADDR(s)”, “ADDR(r.symbol)” and “r.addend” is given below
Now calculate the reference address for given line using the below formula.
B.
Explanation of Solution
Hex value of the relocated reference to “sum”:
From the given Figure 7.12(a), the function “sum” in line 5 is
4004de: e8 05 00 00 00callq 4004e8 <sum>sum()
From the given Figure 7.12(a), the value of “ADDR(s)”, “ADDR(r.symbol)” and “r.addend” is given below
Now calculate the reference address for given line using the below formula.
Then,
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Problem 3) One of the automatic memory deallocations is based on scope of a variable stored in a
memory. Give a Java/etc code in which variable will be deallocated when scope of the variable is over.
Explain in your example when the variable is stored in the memory and when it is deallocated.
Q1) Consider a simple traffic light system to regulate safe pedestrian crossing on a busy lane. Consider the following system requirement:(SysReq:)The traffic lights shall allow pedestrians to safely cross the lane by stopping cars
together with the following software requirements:
(SofReq1:)The light switch for pedestrians will be set to 'green' within x seconds after the pedestrian button has been pressed.
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[1] (
Show your work. Show hoe you compute memory address by using the effective memory
address computation.
Assume the following values are stored at the indicated memory addresses and
registers:
Address Value
0x100
OxFF
0x104
OxAB
0x108
0x13
0x10c
0x11
Register
%rax
%rcx
%rdx
$0x108
(%rax)
4(%rax)
9(%rax, %rdx)
260(%rcx,%rdx)
OxFC (,%rcx, 4)
(%rax, %rdx, 4)
Value
0x100
0x1
0x3
Fill in the following table showing the values for the indicated operands:
Operand
Value
%rax
0x104
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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