Re: Bios , Mbr, Grub

[Gnoleba GNOGBO]

OK !
THANKS A LOT !

Gnoleba



2016-07-05 12:32 GMT+00:00 Daniel. :

> It is not a link, it's a command, the link is this:
> http://git.savannah.gnu.org/cgit/grub.git/tree/
>
> 2016-07-05 3:17 GMT-03:00 Ricardo Ribalda Delgado <
> ricardo.riba...@gmail.com>:
> > https://git-scm.com/book/en/v2
> >
> > On 5 Jul 2016 08:16, "Gnoleba GNOGBO"  wrote:
> >>
> >> Hi Ricardo !
> >>
> >> Your link is wrong : not found
> >> Gnoleba
> >>
> >> Le 4 juil. 2016 12:10, "Ricardo Ribalda Delgado"
> >>  a écrit :
> >>>
> >>> git clone git://git.savannah.gnu.org/grub.git
> >>> find grub/boot/i386/pc/
> >>>
> >>>
> >>> On Mon, Jul 4, 2016 at 11:00 AM, Gnoleba GNOGBO 
> >>> 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 ?
> >>> > In this sector  of 512 bytes we have 440 bytes for a routine what is
> >>> > the
> >>> > function of this routine ? When this routine is executed ? The 2
> bytes
> >>> > with
> >>> > 0xAA55 what is its function ? 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
> >>> > ?
> >>> >
> >>> > Thank you for your help.
> >>> > Greg i am waiting a lot from you !
> >>> >
> >>> > Best regards
> >>> > Gnoleba GNOGBO
> >>> >
> >>> >
> >>> > ___
> >>> > Kernelnewbies mailing list
> >>> > Kernelnewbies@kernelnewbies.org
> >>> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> >>> >
> >>>
> >>>
> >>>
> >>> --
> >>> Ricardo Ribalda
> >
> >
> > ___
> > Kernelnewbies mailing list
> > Kernelnewbies@kernelnewbies.org
> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> >
>
>
>
> --
> "Do or do not. There is no try"
>   Yoda Master
>



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*Gnoleba GNOGBO*

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Re: Bios , Mbr, Grub

[arshad hussain]

> On 04-Jul-2016, at 2:30 pm, Gnoleba GNOGBO  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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> Kernelnewbies@kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies


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Re: Bios , Mbr, Grub

[Gnoleba GNOGBO]

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"  a écrit :

>
> > On 04-Jul-2016, at 2:30 pm, Gnoleba GNOGBO  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
> >
> > ___
> > Kernelnewbies mailing list
> > Kernelnewbies@kernelnewbies.org
> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
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Re: Bios , Mbr, Grub

[Ricardo Ribalda Delgado]

https://git-scm.com/book/en/v2
On 5 Jul 2016 08:16, "Gnoleba GNOGBO"  wrote:

> Hi Ricardo !
>
> Your link is wrong : not found
> Gnoleba
> Le 4 juil. 2016 12:10, "Ricardo Ribalda Delgado" <
> ricardo.riba...@gmail.com> a écrit :
>
>> git clone git://git.savannah.gnu.org/grub.git
>> find grub/boot/i386/pc/
>>
>>
>> On Mon, Jul 4, 2016 at 11:00 AM, Gnoleba GNOGBO 
>> 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 ?
>> > In this sector  of 512 bytes we have 440 bytes for a routine what is the
>> > function of this routine ? When this routine is executed ? The 2 bytes
>> with
>> > 0xAA55 what is its function ? 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
>> ?
>> >
>> > Thank you for your help.
>> > Greg i am waiting a lot from you !
>> >
>> > Best regards
>> > Gnoleba GNOGBO
>> >
>> >
>> > ___
>> > Kernelnewbies mailing list
>> > Kernelnewbies@kernelnewbies.org
>> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>> >
>>
>>
>>
>> --
>> Ricardo Ribalda
>>
>
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Re: Bios , Mbr, Grub

[Gnoleba GNOGBO]

Hi Ricardo !

Your link is wrong : not found
Gnoleba
Le 4 juil. 2016 12:10, "Ricardo Ribalda Delgado" 
a écrit :

> git clone git://git.savannah.gnu.org/grub.git
> find grub/boot/i386/pc/
>
>
> On Mon, Jul 4, 2016 at 11:00 AM, Gnoleba GNOGBO 
> 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 ?
> > In this sector  of 512 bytes we have 440 bytes for a routine what is the
> > function of this routine ? When this routine is executed ? The 2 bytes
> with
> > 0xAA55 what is its function ? 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 ?
> >
> > Thank you for your help.
> > Greg i am waiting a lot from you !
> >
> > Best regards
> > Gnoleba GNOGBO
> >
> >
> > ___
> > Kernelnewbies mailing list
> > Kernelnewbies@kernelnewbies.org
> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> >
>
>
>
> --
> Ricardo Ribalda
>
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Re: Bios , Mbr, Grub

[Ricardo Ribalda Delgado]

git clone git://git.savannah.gnu.org/grub.git
find grub/boot/i386/pc/


On Mon, Jul 4, 2016 at 11:00 AM, Gnoleba GNOGBO  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 ?
> In this sector  of 512 bytes we have 440 bytes for a routine what is the
> function of this routine ? When this routine is executed ? The 2 bytes with
> 0xAA55 what is its function ? 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 ?
>
> Thank you for your help.
> Greg i am waiting a lot from you !
>
> Best regards
> Gnoleba GNOGBO
>
>
> ___
> Kernelnewbies mailing list
> Kernelnewbies@kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>



-- 
Ricardo Ribalda

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