[U-Boot] u-boot.lds i686-pc-linux-gnu-ld section .start16 overlaps section .text

[U-Boot] u-boot.lds i686-pc-linux-gnu-ld section .start16 overlaps section .text

[LanceZ]

Hi I add a ethernet driver to u-boot, when I compile the source tree, I got
the following link error, can anyone please suggest me how to fix the error?

i686-pc-linux-gnu-ld:
 section .start16 [05ffff00 -> 05ffffba] overlaps section .text [05fe0000 ->
06011b85]
i686-pc-linux-gnu-ld:
 section .reset [05fffff0 -> 05ffffff] overlaps section .text [05fe0000 ->
06011b85]
make: *** [u-boot] Error 1

I searched in Google, and someone suggest that I can modify u-boot.lds to
fix the error, but I do not know how to do that.  appreciate it if anyone
can give me a hint or a solution.

Thanks



-- 
View this message in context: http://www.nabble.com/u-boot.lds---i686-pc-linux-gnu-ld-section-.start16-overlaps-section-.text-tp20828386p20828386.html
Sent from the Uboot - Users mailing list archive at Nabble.com.

[U-Boot] u-boot.lds i686-pc-linux-gnu-ld section .start16 overlapssection .text

[Vignesh Kumar B]

Hi,

It seems ur linker script is overlapping both the sections .start16 and
text and similarly the reset and text.
Try to change the boundary limits for the sections to prevent conflicts,
this is due to the new addition of the driver code.


Thanks & Regards,
Vignesh Kumar B


-----Original Message-----
From: u-boot-bounces@lists.denx.de [mailto:u-boot-bounces at lists.denx.de]
On Behalf Of LanceZ
Sent: Thursday, December 04, 2008 12:38 PM
To: u-boot at lists.denx.de
Subject: [U-Boot] u-boot.lds i686-pc-linux-gnu-ld section .start16
overlapssection .text


Hi I add a ethernet driver to u-boot, when I compile the source tree, I
got
the following link error, can anyone please suggest me how to fix the
error?

i686-pc-linux-gnu-ld:
 section .start16 [05ffff00 -> 05ffffba] overlaps section .text
[05fe0000 ->
06011b85]
i686-pc-linux-gnu-ld:
 section .reset [05fffff0 -> 05ffffff] overlaps section .text [05fe0000
->
06011b85]
make: *** [u-boot] Error 1

I searched in Google, and someone suggest that I can modify u-boot.lds
to
fix the error, but I do not know how to do that.  appreciate it if
anyone
can give me a hint or a solution.

Thanks



-- 
View this message in context:
http://www.nabble.com/u-boot.lds---i686-pc-linux-gnu-ld-section-.start16
-overlaps-section-.text-tp20828386p20828386.html
Sent from the Uboot - Users mailing list archive at Nabble.com.

_______________________________________________
U-Boot mailing list
U-Boot at lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot

Thanks & Regards,
Vignesh Kumar B




Disclaimer:
This message and any attachment(s) contained here are information that
is confidential, proprietary to HCL Technologies and its customers.
Contents may be privileged or otherwise protected by law. The
information is solely intended for the individual or the entity it is
addressed to. If you are not the intended recipient of this message, you
are not authorized to read, forward, print, retain, copy or disseminate
this message or any part of it. If you have received this e-mail in
error, please notify the sender immediately by return e-mail and delete
it from your computer.


-----Original Message-----
From: u-boot-bounces@lists.denx.de [mailto:u-boot-bounces at lists.denx.de]
On Behalf Of LanceZ
Sent: Thursday, December 04, 2008 12:38 PM
To: u-boot at lists.denx.de
Subject: [U-Boot] u-boot.lds i686-pc-linux-gnu-ld section .start16
overlapssection .text


Hi I add a ethernet driver to u-boot, when I compile the source tree, I
got
the following link error, can anyone please suggest me how to fix the
error?

i686-pc-linux-gnu-ld:
 section .start16 [05ffff00 -> 05ffffba] overlaps section .text
[05fe0000 ->
06011b85]
i686-pc-linux-gnu-ld:
 section .reset [05fffff0 -> 05ffffff] overlaps section .text [05fe0000
->
06011b85]
make: *** [u-boot] Error 1

I searched in Google, and someone suggest that I can modify u-boot.lds
to
fix the error, but I do not know how to do that.  appreciate it if
anyone
can give me a hint or a solution.

Thanks



-- 
View this message in context:
http://www.nabble.com/u-boot.lds---i686-pc-linux-gnu-ld-section-.start16
-overlaps-section-.text-tp20828386p20828386.html
Sent from the Uboot - Users mailing list archive at Nabble.com.

_______________________________________________
U-Boot mailing list
U-Boot at lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot

DISCLAIMER:
-----------------------------------------------------------------------------------------------------------------------

The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only.
It shall not attach any liability on the originator or HCL or its affiliates. Any views or opinions presented in 
this email are solely those of the author and may not necessarily reflect the opinions of HCL or its affiliates.
Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of 
this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have 
received this email in error please delete it and notify the sender immediately. Before opening any mail and 
attachments please check them for viruses and defect.

-----------------------------------------------------------------------------------------------------------------------

[U-Boot] u-boot.lds i686-pc-linux-gnu-ld section .start16 overlapssection .text

[Lance Zhang]

Vignesh, Thank you very much.

>Try to change the boundary limits for the sections to prevent
conflicts,
>this is due to the new addition of the driver code.
I am not familiar with the liker script.
Can I simplely modify the following codes in u-boot.lds
	. = 0xff00;
 	.start16 : AT (0x05ffff00) { *(.start16); }
 
 	. = 0xfff0;
 	.reset : AT (0x05fffff0) { *(.reset); }

To 
	. = 0xff00;
 	.start16 : AT (0x06ffff00) { *(.start16); }
 
 	. = 0xfff0;
 	.reset : AT (0x06fffff0) { *(.reset); }

The compilation is Ok, but the file size is 26M, it is very large.

Can you told me how to change the lds file. Thanks very much

The errors outputted by ld
i686-pc-linux-gnu-ld:
 section .start16 [05ffff00 -> 05ffffba] overlaps section .text
[05fe0000 -> 06011b85]
i686-pc-linux-gnu-ld:
 section .reset [05fffff0 -> 05ffffff] overlaps section .text [05fe0000
-> 06011b85]
make: *** [u-boot] Error 1

The lds contents:
OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
 OUTPUT_ARCH(i386)
 ENTRY(_start)
 
 SECTIONS
 {
 	/* here is where we are in flash: last 128k */
 	. = 0x05fe0000;
 
 	.text  : { *(.text); }
 
 	. = ALIGN(4);
 	.rodata : { *(.rodata) *(.rodata.str1.1) *(.rodata.str1.32) }
 
 
 	/* define its reloation address as off in RAM at 1M below 64M
line,  but use 
 	 * AT () to make its load address right here, after previous
 	 */
 	. = 0x2000;

 	_i386boot_romdata_dest = ABSOLUTE(.);
 	.data : AT ( LOADADDR(.rodata) + SIZEOF(.rodata) ) { *(.data) }
 	_i386boot_romdata_start = LOADADDR(.data);
 
 	__u_boot_cmd_start = .;
 	.u_boot_cmd : AT ( LOADADDR (.data ) + SIZEOF (.data) ) {
*(.u_boot_cmd) }
 	__u_boot_cmd_end = .;

  	.got : AT ( LOADADDR(.u_boot_cmd) + SIZEOF(.u_boot_cmd) ) {
*(.got) }
 	_i386boot_romdata_size = SIZEOF(.data) + SIZEOF(.got) + SIZEOF
(.u_boot_cmd);
 
 	. = 0x8000;
 	_i386boot_bss_start = ABSOLUTE(.);
 	.bss : { *(.bss) }
 	_i386boot_bss_size = SIZEOF(.bss);
 
 	/* 16bit realmode trampoline code */
 	.realmode 0x7c0 : AT ( LOADADDR(.got) + SIZEOF(.got) ) {
*(.realmode) }
 
 	_i386boot_realmode = LOADADDR(.realmode);
 	_i386boot_realmode_size = SIZEOF(.realmode);
 
 	/* 16bit BIOS emulation code (just enough to boot Linux) */
 	.bios 0 : AT ( LOADADDR(.realmode) + SIZEOF(.realmode) ) {
*(.bios) }
 
 	_i386boot_bios = LOADADDR(.bios);
 	_i386boot_bios_size = SIZEOF(.bios);
 
 
 	/* The load addresses below assumes that the flash
 	 * will be mapped so that 0x3fe0000 == 0xffff0000
 	 * at reset time
 	 *
 	 * The fe00 and ff00 offsets of the start32 and start16
 	 * segments are arbitrary, the just have to be mapped
 	 * at reset and the code have to fit.
 	 * The fff0 offset of reset is important, however.
 	 */
 
 	. = 0xfffffe00;
 	.start32 : AT (0x05fffe00) { *(.start32); }
 
 	. = 0xff00;
 	.start16 : AT (0x05ffff00) { *(.start16); }
 
 	. = 0xfff0;
 	.reset : AT (0x05fffff0) { *(.reset); }
 	_i386boot_end = (LOADADDR(.reset) + SIZEOF(.reset) );
 }

[U-Boot] u-boot.lds i686-pc-linux-gnu-ld section .start16 overlapssection .text

[Graeme Russ]

Hi Lance,

I've been working on the i386 build for a while now and have some knowledge
 of the linker script for this particular port so hopefully I can give some
meaningful advice....

Lance Zhang wrote:
> Vignesh, Thank you very much.
> 
>> Try to change the boundary limits for the sections to prevent
> conflicts,
>> this is due to the new addition of the driver code.

There should have been a fair amount of space left in the binary. For
example, my current build has a gap from 0x14cca to 0x3f7ff (~170kB) in a
256kB binary so there should be plenty of room to add an Ethernet driver

> I am not familiar with the liker script.
> Can I simplely modify the following codes in u-boot.lds
> 	. = 0xff00;
>  	.start16 : AT (0x05ffff00) { *(.start16); }
>  
>  	. = 0xfff0;
>  	.reset : AT (0x05fffff0) { *(.reset); }
> 
> To 
> 	. = 0xff00;
>  	.start16 : AT (0x06ffff00) { *(.start16); }
>  
>  	. = 0xfff0;
>  	.reset : AT (0x06fffff0) { *(.reset); }

Probably not. The locations of .start16 and .reset must be very carefully
set. .reset must occupy the last 16 bytes of your binary image. The i386
starts executing code 16 bytes before the very end if its (real mode)
address space. Other CPUs start at 0x0000000 which makes life a lot easier

.start16 is the code that switches the CPU into protected mode. Until then,
branch distances are (fairly) short, so .start16 needs to be close to .reset

> 
> The compilation is Ok, but the file size is 26M, it is very large.
> 
> Can you told me how to change the lds file. Thanks very much
> 
> The errors outputted by ld
> i686-pc-linux-gnu-ld:
>  section .start16 [05ffff00 -> 05ffffba] overlaps section .text
> [05fe0000 -> 06011b85]

If you look at the layout of the various sections in the binary now, .text
occupies 0x05fe0000 -> 0x06011b85 and .reset occupies 0x06fffff0 -> 0x06ffffff

0x06ffffff (end of .reset) - 0x05fe0000 (start of .text) = 0x101ffff
(~16MB) and most of this is just empty space (0x06011b86 -> 0x06fffeff -
end of .text to start of .start16) - The extra 10M is a bit of a mystery -
maybe more space between sections

Have a look at u-boot.map - This file is generated by the linker and it
will tell you exactly where it put everything

Also, .text section (the one that holds all the code) looks to be very big:

0x06011b85 - 0x05fe0000 = 0x31b85 (~200kB)

You bootloader image will be bigger than this still after all the .data
sections are added (printf strings etc)

> i686-pc-linux-gnu-ld:
>  section .reset [05fffff0 -> 05ffffff] overlaps section .text [05fe0000
> -> 06011b85]
> make: *** [u-boot] Error 1
> 
> The lds contents:
> OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
>  OUTPUT_ARCH(i386)
>  ENTRY(_start)
>  
>  SECTIONS
>  {
>  	/* here is where we are in flash: last 128k */

This looks like a problem - Your flash is only 128k, but you code is at
least 200k

<snip> - Remainder of script looks OK

I would stick to the original linker script and try to figure out why .text
 grew so much. Have a look at u-boot.map and try to figure out what is
using all the space

Regards,

Graeme

[U-Boot] u-boot.lds i686-pc-linux-gnu-ld section .start16 overlapssection .text

[Lance Zhang]

>Have a look at u-boot.map - This file is generated by the linker and it
will >tell you exactly where it put everything
>Also, .text section (the one that holds all the code) looks to be very
big:
>0x06011b85 - 0x05fe0000 = 0x31b85 (~200kB)

Graeme, Thank you very much.

I know the root cause, the Ethernet driver use lots of address space. I
ported the driver from a Linux driver (wireless Linux Ethernet driver),
just modified some u-boot incompatible functions. And the codes are very
large. I will remove some codes


But when I remove the Ethernet module, I looked the System.map file and
found that I can only use 6312 bytes space. It will be difficult for me
to reduce the wireless Ethernet driver into 6312bytes. Anyway Thanks for
the explanations.

Lance Zhang

[U-Boot] u-boot.lds i686-pc-linux-gnu-ld section .start16 overlapssection .text

[Graeme Russ]

Lance Zhang wrote:
>> Have a look at u-boot.map - This file is generated by the linker and it
> will >tell you exactly where it put everything
>> Also, .text section (the one that holds all the code) looks to be very
> big:
>> 0x06011b85 - 0x05fe0000 = 0x31b85 (~200kB)
> 
> Graeme, Thank you very much.
> 
> I know the root cause, the Ethernet driver use lots of address space. I
> ported the driver from a Linux driver (wireless Linux Ethernet driver),
> just modified some u-boot incompatible functions. And the codes are very
> large. I will remove some codes
> 
> 
> But when I remove the Ethernet module, I looked the System.map file and
> found that I can only use 6312 bytes space. It will be difficult for me

Hmm, I have 170kB free - minus 128kB (assuming you're using a 128kB flash
rather than my 256kB) leaves 42kB, so you are using ~36kB more than my 86kB
Looks like you may have some places to carve out some code.

> to reduce the wireless Ethernet driver into 6312bytes. Anyway Thanks for
> the explanations.

Good luck, glad to be of service

> 
> Lance Zhang

Graeme

[U-Boot] u-boot.lds i686-pc-linux-gnu-ld section .start16 overlapssection .text

[LanceZ]

>Hmm, I have 170kB free - minus 128kB (assuming you're using a 128kB flash
>rather than my 256kB) leaves 42kB, so you are using ~36kB more than my 86kB
>Looks like you may have some places to carve out some code.


>Good luck, glad to be of service
I changed the space to 256KB, and build OK.  Thanks for all the help


-- 
View this message in context: http://www.nabble.com/u-boot.lds---i686-pc-linux-gnu-ld-section-.start16-overlaps-section-.text-tp20828386p20968976.html
Sent from the Uboot - Users mailing list archive at Nabble.com.