From: carlo.caione@gmail.com (Carlo Caione)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Query on linker scripts
Date: Sat, 24 Mar 2012 16:26:38 +0100 [thread overview]
Message-ID: <4F6DE7AE.9070808@gmail.com> (raw)
In-Reply-To: <CAKuUYSw=_zZykPWeTbJsGEYPPSroWK+whm0o5L_PnCManVcrng@mail.gmail.com>
On 24/03/2012 05:43, Vaibhav Jain wrote:
> Hi,
[cut]
> is confusing. An example is the use of symbols sbss and ebss in the bss
> section as show in the script below
> ENTRY (loader)
> SECTIONS
> {
> . = 0x00100000;
> .text ALIGN (0x1000) :
> {
> *(.text)
> }
> .rodata ALIGN (0x1000) :
> {
> *(.rodata*)
> }
> .data ALIGN (0x1000) :
> {
> *(.data)
> }
> .bss :
> {
> sbss = .;
> *(COMMON)
> *(.bss)
> ebss = .;
> }
> }
I'm not sure if you are OT, anyway...
i.e. they are useful if you want to clear the bss section before execution.
[snippet for ARM proc]
...
ldr r2, =_sbss
b LoopFillZerobss
/* Zero fill the bss segment. */
FillZerobss:
movs r3, #0
str r3, [r2], #4
LoopFillZerobss:
ldr r3, = _ebss
cmp r2, r3
bcc FillZerobss
...
--
Carlo Caione
next prev parent reply other threads:[~2012-03-24 15:26 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-24 4:43 Query on linker scripts Vaibhav Jain
2012-03-24 15:26 ` Carlo Caione [this message]
-- strict thread matches above, loose matches on Subject: below --
2012-03-24 18:45 Pranay Kumar Srivastava
[not found] ` <CAKuUYSwPiuGTa+8r6O+-GMLu9e6dXOXNfDHu4UBx2yvrHcQyvw@mail.gmail.com>
2012-03-26 6:41 ` Pranay Kumar Srivastava
2012-03-26 11:01 ` Vaibhav Jain
2012-03-26 11:54 ` Pranay Kumar Srivastava
2012-03-27 1:38 ` Vaibhav Jain
2012-03-27 11:00 ` Pranay Kumar Srivastava
2012-03-26 15:14 ` Dave Hylands
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