E Task Project -- System Calls

You have to present the E2 and E3 tasks personally. E0 and E1 are evaluated automatically by the Upload System.

WARNING: This information might be out of date. This version is up-to-date for the summer term 2016.

Your task is to create a program in assembly language (x86) for computing Fibonacci number without using any other libraries. For reading a value from stdin and printing the result use “int 0x80” system call. Details are in the PDF provided.

cfibo.c -- Reference implementation in C language

cfibo_errchk.c -- Reference implementation in C language with error checking

Makefile for E0 task

Please upload only .s file with assembly code.

E0_Syscalls (PDF)

Support information and specification (PDF)

Inline assembly info (PDF)

Inline assembly at linux-insides

Create a program that:

• opens a (text) file named file.txt (in the current directory)
• reads the first 100 characters from the file (or the whole file if it is shorter)
• prints the first line read to the stdout (a line is terminated by the EOL character)
• executes a program /bin/date (using a syscall execve())

Implement the program using system calls only. Do not use standard C libraries – Use gcc parameters -nostdlib -nostdinc for compilation.

Implement the task in one .c file. You can eventually create a few other included files .h. Upload the solution file (single .c in a ZIP archive) using the Upload System.

Support materials and E2 task specs (PDF)

OS kernel source (tar.gz)

GCC inline assembler howto (online)

Upload only changed files to the Upload System, i.e. only ec.cc.

E3 specification (PDF)