ToolChain


A Toolchain is the set of Programming Tools that are used to create software. The Tools are used in a chain , so that the output of each tool becomes the input for the next tool.

 

Editor:

Editor is program in which we can write our code and edit that code. Gedit , kwrite are the examples of editors.

 

File name : Demo.c

#include<stdio.h>

#define MAX 10

int Add(int No1, int No2)

{

Int Ans; //Local Variable

Ans = No1 + No2 + MAX ;

printf(“Addition of Two Numbers is %d”,Ans);

return Ans;

}

 

Pre-processor:

The Pre-processors provide the ability for the inclusion of header files, macro expantion, conditional compilation,and line control.

Pre-processor takes lines beginning with ‘#’ as a directives. Because it does not know about the underlying language.

After Preprocessing it will give the expanded code as a output having extension .i.

 

File name : Demo.i

int printf( const char * format, …);

int scanf( const char * format, …);

int Add(int No1, int No2)

{

int Ans;

Ans = No1 + No2 + 10 ;

printf(“Addition of Two Numbers is %d”,Ans);

return Ans;

}

 

Tool Chain Bucket

 

Compiler :

Compiler is the program which is used for translating source code from a high level programming language (like c,c++) to lower level programming language (like machine language).So, in this case we consider that output is in assembly language having extention .asm or .s.File name : Demo.asmAdd: PUSH ECX PUSH EDX ADD ECX,EDX ADD ECX,10 MOV EAX,ECXRETN

 

Assembler :

Assembler is a program which translates assembly language program to an object file , which

contains the code in machine language. Object file does contain the machine code but still it is non-executable.

 

Extention of object file is .obj.

 

File name : Demo.obj

10110110111000101001010

10101110100010100101010

10111011101110101110110

00101110111011101110101

00100010000100001001010

10111011101110110111101

01000100001111101110101

 

Linker :

A Linker is a program which takes one or more object files and combines them into a single

executable program having extension .exe.

 

File name : Demo.exe

 

Demo.obj Other.obj

10110110111000101001110 10100110111000101001010

10101110100010100001010 10110111111000101001010

10111011101110101010110 10110110111000101001011

10101110111011101110101 + 00100010000100001001110

10100010000100001001010 00100010000100001001011

00111011101110110111101 00100010000100001001011

11000100001111101110101 10111011101110101110111

 

Demo.exe

10101110100010100101010

10111011101110101110110

00101110111011101110101

00100010000100001001010

10111011101110110111101

01000100001111101110101

10101110100010100101010

10111011101110101110110

00101110111011101110101

00100010000100001001010

10111011101110110111101

01000100001111101110101

 

Loader :

A Loader is a program which is the part of OS i.e. operating system that is responsible for loading programs.

It places program in memory (RAM) and prepares them for the execution and loading a program

involves reading a contents of an executable file like text , data into the memory.

 

Demo.exe running in RAM

10101110100010100101010

10111011101110101110110

00101110111011101110101

00100010000100001001010

10111011101110110111101

01000100001111101110101

10101110100010100101010

10111011101110101110110

00101110111011101110101

00100010000100001001010

10111011101110110111101

01000100001111101110101

 

Tool Chain

 

Set of the Commands which will elaborate the Toolchain components :-

Step 1. Create a file name as Demo.c which contains simple C program.

 

Step 2. Compile that file using command

# gcc -S -o Demo.S Demo.c

This command gives output file in assembly language named as Demo.S

 

Step 3. Pass that Assembly file to assembler which gives output as a object file named as

Demo.o

# as -o Demo.o Demo.S

 

Step 4. Pass that object file to Linker which gives output as a executable file.

# ld -o Demo -lc -dynamic-linker /lib/ld-linux.so.2 Demo.o -e main

 

Step 5. Run that executable using

# ./Demo

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About Sourabh Bhunje

Sourabh Bhunje, B.E. IT from Pune University. Currently Working at Techliebe. Professional Skills: Programming - Software & Mobile, Web & Graphic Design, Localization, Content Writing, Sub-Titling etc.

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