Assignment 5: C and Assembly Code Tutorial: Computing Sums

My ID

Ioannis Chatziantoniou csd5193

1) My answers about x86asm.s

(a) The sum from 11 to 1000 is 500445

(b) H antigrafi kai h symplirwsi sxoliwn egine sto arxeio x86asm_comments.s

(c) gdb trexei kanonika to ektelesimo kai emfanizetai oti kai sto (a)

(d) O arithmos entolwn stin main einai 19 .
Afairoyme tin duo dieuthinsis . Tin arxi tis main (0x8049162)
kai to telos tis poy kanei return (0x804919b)
804919b-8049162=57 +1 logw tis main ara 58 Bytes
To breakpoint to bazw me offset 27 (line 33) (stin prwti entoli stin L2)

(e) p(int)S -> Output: $1=500445
p(int*) &S -> Output: $2=(int*)0x804c01c
p(char*) &Msg -> Output: $3=0x804c020 "The sum from 11 to %d is %d\n"

To programma ektypwnei : The sum from 11 to 1000 is 99

2) My answers about sum.c

(a) The sum from 11 to 1000 is 500445

(b) O arithmos entolwn stin main einai 28

(c) Compile to sum.c me arguments kai ektipwnetai oti kai sto (a)

(d) O arithmos entolwn einai 29 kai o arithmos twn Byte einai
0x80490b1-0x8049050 = 97 +1 logw tis main ara 98 Bytes
To breakpoints to bazw se offset = 13 (line 15) ekei opoy teleiwnei
h while tis main

(e) p Sum -> Output: $1= 500445
p &Sum -> Output: $2= (int*)0x804c024 < Sum >
p n -> Output: $3= 10
p &n -> Output: $4= (int*)0x804c01c < n >

To programma ksana typwnei : The sum from 11 to 1000 is 500445

(f) The sum from 11 to 1000 is 495450

3) My answers about x86sum.c

(a) to programma typwnei : The sum from 11 to 1000 is 500445

(b) o arithmos entolwn tis main sto .s arxeio einai 25

(c) to programma ektypwnei : The sum from 11 to 1000 is 500445

Make Repository Private and Add TAs as Members

You can make the repo private and add TAs as members by hand or using the private.py script

By Hand

1. Go to Project Settings -> General
2. Visibility
3. Change Project Visibility to Private

Also add the TA in your project

1. Go to ProjectSettings -> Members
2. Add Iacovos Kolokasis as a Developer

Using the Script

The private.py script is written in Python 3. To run private.py script, please have Python 3.4 or higher, Git 1.8 or higher and python-gitlab installed.

• Install gitlab lib

pip3 install --upgrade python-gitlab --user

• Run the script

python3 private.py -t <personal token> -p <project_ id>

Submission

• You should submit the source files of each assignment. Do not submit the object or executable file
• Commit all files (not executables or object files!)

git add file1.c file2.c file3.c
git commit -m "Commit message"
git push