COP 3402 Computer Science I Fall 2000 - Assignment # 2
Your assignment is to write a loader that reads the object code output by Pass2 and loads it into memory.
There is an example below that shows sample input and the expected output for that input. This
assignment must be written in standard C and will be graded on the Olympus system using the gcc
compiler. Make sure your program works under those conditions.
Rather than actually load the program's object code into a machine, you will be displaying the contents of
the object code file in a format that shows that you correctly read and broke apart the various items.
Input format:
The input format is an object code file produced by Pass2, therefore the format is described in the Pass 2
document. The example below shows a sample input file called ex3.obj and should be compared to the
format described in the Pass 2 document and the output shown below.
The line breaks after the first and next-to-last lines are deliberate, the other line breaks are a result of line
wrapping in the word processor. Therefore, you should consider that there are only 3 lines in this file, the
first line starting with the word PROGRAM, the second line starting with the number 2403 and the third
line starting with the word EXTERN.
The output file name should be based on the input file name, but with the .obj extension changed to .ld
(see the example below).
Output format:
Your program's output goes to a text file and should match the output format shown in the example.
The box below shows the correct screen output format for the above input. Make sure that the phrase
"Your Name Here" is replaced by your actual name. The text in italic indicates the user's input. All other
text is generated by your program.
This assignment is due in class on Thursday Nov 30.
Late assignments must be in by the final exam on Dec 7.
PROGRAM8EXAMPLE3006A
240300004004000A5084000248840002A88050002D400010806418001C84001A48840002C7FFFFE8
1C600028D0000000596F7572204E616D650000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000
EXTERN030ASUBROUTINE05MYLIB0000005805SQRTF07MATHLIB0000005C04SUB205MYLIB00000060
COP 3402 Fall 2000 - Assembler Project
Loader Assignment - Your Name Here
Enter input filename: ex3.obj
Starting loader on: ex3.obj...
Loader output written to: ex3.ld
