We are using ptxdist [1] and the OSELAS toolchains for building Linux and the software around it for our embedded target, which is a at91sam9g20 on a board similar (not identical) to the ek board. Compiling the at91bootstrap with the 2011.03.1 toolchain including gcc 4.5.2, glibc 2.13 and binutils 2.21 worked fine. After upgrading to OSELAS toolchain 2011.11.0 with gcc 4.6.2, glibc 2.14.1 and binutils 2.21.1a building at91bootstrap fails with the following error:



While compiling works, the linker seems to have a problem. I searched the web and only found this:

http://lists.busybox.net/pipermail/buil ... 43505.html

No answer with solution, not very helpful so far.

Has anybody experienced similar problems here and already got a solution or at least a hint how to solve this issue? Maybe a patch I didn't find?

Greets

[1] http://www.ptxdist.org/

I just started trying to compile this project and have encountered the same error. My toolchain is a little different than yours (I'm using YAGARTO), and I'm compiling for a different board (the at91sam9m10g45ek).

I haven't figured out how to make this problem go away yet...just figured I'd let you know that you're not alone. If you've already managed to come by a solution, could you post some hint at how you fixed it here? Otherwise I will try to update whatever I find as a workaround later.

Thanks.

The comment on the Web site you refer to says:

I noticed some "3" versions of the Bootstrap on the Linux4Sam site before, but really didn't know what to make of them. They looked a bit like works-in-progress, so I figured I would stick with the oft-mentioned (and I assumed reliable) v. 1.16.

After the "overlap" linker error that we both experienced, I decided to download the "3" patch from the FTP link above. I just wanted to compare the two projects so that I could at least get v. 1.16 up and running. I concentrated on the "elf32-littlearm.lds" file, as this is where I figured the memory mapping specifications for .text and .data would reside. Modifiying this file, I definitely got things working...I was able to replace the original Linux4Sam AT91 bootstrap file with mine, load it to the board, and actually boot into Linux. I call that a success.

I'll step through what I did in a little more detail. First, I compiled the v. 1.16 bootstrap project and waited for the "overlap" error to appear again. This build does generate a .map file, which I set aside. Then I modified the "elf32-littlearm.lds" file with some code from the "3" patch .lds file. I compiled the v. 1.16 bootstrap with this modification. Next, I diff'd the .map files. No surprise, these files were different. There isn't a huge difference in these files, but I will highlight what I think were the most important items.

The .map file generated with the ORIGINAL v. 1.16 bootstrap project looked like this:

The .map file generated with the MODIFIED v. 1.16 bootstrap project looked like this:

The original output file generated .text.startup code at location 0x00301114, which happened to be a location greater than 0x0030113c, where the .data section started. Hence the overlap. The modified code realigned the .text.startup code into location 0x0030113c, eliminating the overlap.

Here is what I did to the .lds file:

I added this (just before the .data section:


And I modified the .data section like this (just replaced the data location) :

As I've said, all of this seems to work just fine. However, I haven't really done much with .lds files before...I knew they existed, but I'm taking baby steps into the world of ARM development, so this was something new for me to work with. Someone else may say that I should have modified the v. 1.16 .lds file differently, or that I should not have modified it at all. I am definitely open to insight and suggestions. From the way it sounds, though, gcc 4.6.2 seems to want this file modified.

I integrated this in my project and it compiles again. I didn't have time yet to test it on the target hardware, will try this next week. Thank you so far!

Had this tested now and it works, at least my target boots. I'll paste the patch, because uploading does not work because .patch, .diff and even .txt are no allowed file extensions for this board.