Hi,
we've kind of run into an interesting situation recently, but might be
of interest for various folks trying to reduce the image sizes.
our AM335x device has a limited amount of sram.. and the SPL tries to
fit into it (a bit tricky given the restricted space we have on it on
certain class of devices).
arch/arm/mach-omap2/am33xx/u-boot-spl.lds is a bit custom tailored
around this.
Key in this is:
. = ALIGN(4);
.rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } >.sram
. = ALIGN(4);
.data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram
Now, our jenkins build system happens to use a varied build path and
uses O= path. to simplify the details:
mkdir
/tmp/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/cccccccccccccccccccccccccccccccccccccccccccccccccc
mkdir
/tmp/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/cccccccccccccccccccccccccccccccccccccccccccccccccc/b
git clone u-boot
cd u-boot
git clean -fdx
make CROSS_COMPILE=arm-linux-gnueabihf- O=../b am335x_evm_defconfig
make CROSS_COMPILE=arm-linux-gnueabihf- O=../b all
depending on depth of the path, this would fail.. a little bit of
headscratching later..
when using O= build system uses absolute paths, which translates to
__FILE__ being absolute paths as well..
in u-boot, any printf("%s", __FILE__) makes u-boot allocate this file
path in rodata.
So, depending on how deep the path is rodata size varies and ends up
pushing .data out of sram max range.
we dont really care to put a print of complete absolute path anyways,
and I am not really sure of a clean way to resolve this:
a) override __FILE__ with something.. -Wbuiltin-macro-redefined kicks in
b) replace usage of __FILE__ with something like __FILENAME__ as
recommended by [1]
What is the suggestion we do?
[1] http://stackoverflow.com/questions/8487986/file-macro-shows-full-path
--
Regards,
Nishanth Menon
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
