serge1/ELFIO

Entry of elf executable

circutrider21 opened this issue · 3 comments

circutrider21 commented

This is more of a question than a issue, but how do we determine the entry address of a elf executable. In the tutorial, the entry address was 0x08048000, but I have no idea where that number came from.

Any explanation would be be helpful

PS: Could someone also explain align and what is is, Thanks!

serge1 commented

Hi,

The entry address is the code location where a program starts its execution. Usually, a linker sets this address on base of ‘_start’ label.

For the case of the ‘writer’ example, the code starts at the first address. The code resides in ‘text_seg’ segment. This segment is placed at address 0x08048000. Therefore, the start address is also set to be equal to 0x08048000.

Best regards,
Serge

serge1 commented

The similar comment has been added to the example source file

circutrider21 commented

Thanks!