----- Original Message -----
From: "Vijaymahantesh Kalakoti" <vijayck@sasken.com>
To: <kernelnewbies@nl.linux.org>
Sent: Tuesday, June 15, 2004 6:30 PM
Subject: Query on do_initcalls() function.
>
> Hi all,
>
> I am going through the kernel bootup sequence.
> When the function do_initcalls() is called
>
> The definition of the function is;
>
> static void __init do_initcalls(void)
> {
> initcall_t *call;
>
> call = &__initcall_start;
> do {
> (*call)();
> call++;
> } while (call < &__initcall_end);
>
> /* Make sure there is no pending stuff from the initcall
> sequence */
> flush_scheduled_tasks();
> }
>
> 1. Here __initcall_start variable is being used. But I couldn't understand
> what it is? Where it is being initialized ??
This variable represents a section in executable and is initialized by
linker. Read your linker script to get more information about this variable.
Or in your source, you can find gcc __attribute__ which puts function calls
in __initcall_start section.
>
> 2. What is role of these *.S files like the arch/sh/boot/compressed/head.S
> files in the linux kernel.??
These are architecture dependent kernel startup files written in assembly.
Basic initialization and such kind of stuff goes here.
Regards
Mohanlal
> Could u pls help me out in this regard?
>
> --
> -----------------------------------
> Thanks & Regards
> vijay kalkoti
> -----------------------------------
>
>
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