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" <arshad.super@xxxxxxxxx> a écrit :
> On 04-Jul-2016, at 2:30 pm, Gnoleba GNOGBO <gnognoleba@xxxxxxxxx> wrote:
>
> Hi !
>
> I had read a lot of book and link about initialization of the boot starting of linux.
>
> 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.
> 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
> When this routine is executed ?
Just after POST. Done by BIOS.
> The 2 bytes with 0xAA55 what is its function ?
Its denotes that the sector is executable. Can also be seen as Marker.
> 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 ?
> 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 exécution ?
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.
>
> Thank you for your help.
> Greg i am waiting a lot from you !
>
> Best regards
> Gnoleba GNOGBO
>
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