Hi !

Thanks for your answears.
Can you give le the link where i can find "Understanding the linux system
startup " please ?
Regards

Gnoleba
Le 6 juil. 2016 04:00, "arshad hussain" [off-list ref] a ?crit :

quoted

On 04-Jul-2016, at 2:30 pm, Gnoleba GNOGBO [off-list ref] wrote:

Hi !

I had read a lot of book and link about initialization of the boot

starting of linux.

quoted

I read that , after the post by the bios the mbr is loaded in memory

which routine load this sector ?

This is architecture specific and is done by BIOS.

quoted

In this sector  of 512 bytes we have 440 bytes for a routine what is the

function of this routine ?

Actually its 446 bytes. These are executable code.

16bytes per partition * 4 = 64bytes + (0xAA55) 2 bytes for MBR Marker =
66bytes

512 - 66 = 446 bytes

quoted

When this routine is executed ?

Just after POST. Done by BIOS.

quoted

The 2 bytes with 0xAA55 what is its function ?

Its denotes that the sector is executable. Can also be seen as Marker.

quoted

Who load it in memory ? And the all book i had read said the mbr load

the loader grub How ? And the grub launch the kernel, ok . How this grub is
load ? By which programm ?

quoted

So, i would like that someone give me the names of routines, the order

of their launching and which load or execute what until the grub ex?cution ?

I would suggest work it floppy on qemu/bochs first to understand then
gradually
move on to partition tables and boot loaders.

Read ?Understanding the linux kernel? - System Startup chapter for
thorough understanding.

Thanks.

quoted

Thank you for your help.
Greg i am waiting a lot from you !

Best regards
Gnoleba GNOGBO

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