Question

Please explain answer.

data in address 0x00000004: 0x15

Get 4 bytes of data from address 0x00000004, assume Little-Endian byte ordering in memory

Answer 1

I am guessing you are trying to examine a memory address while you are debugging. In gdb you can do this:

For this purpose we can use the examine command. This command is used to look at a certain address of memory in a variety of ways. This command expects two arguments when it's used: the location is memory to examine and how to display that memory.

Syntax:- x/FMT Size_letter(without space) Address

FMT is how you want to format content when it is displayed on screen. The possible values are:

t : binary; f : float; a : address; c : char; z : hex; s : string,....

Size Letter represent the size of the output.

b : byte; h : halfword(2 byte); w : word(4byte); g : giant(8byte)

Now the command we need will be

x/zw 0x00000004

This means that print 4 bytes of the given memory location in hexadecimal.

Hope this helps. If you have any queries or suggestions regarding the answers please leave them in the comments section so I can update and improve the answer. Thank you.