[U-Boot] [PATCH] ARMv7: Fix linker errors across toolchain versions
Albert ARIBAUD
albert.aribaud at free.fr
Wed Dec 1 22:39:38 CET 2010
This one is a conundrum.
Using 2010q1, building omap3_evm causes a linker warning
"arm-none-linux-gnueabi-ld: u-boot: section .bss vma 0x8003e8f0 overlaps
previous sections" while building omap3_beagle does not cause any linker
warning.
Both boards use the same armv7 u-boot.lds and have a .bss which is way
bigger than the .rel.dyn plus .dynsym sections that it does overlay.
IOW, they have a similar layout for .rel.dyn, .dynsym and .bss, but one
gets the warning and one does not.
The one difference a readelf shows is that for beagle, there is only one
segment:
00 .text .rodata .hash .data .got.plt .u_boot_cmd .rel.dyn .dynsym
While for evm there is
00 .text .rodata .hash .data .got.plt .u_boot_cmd .rel.dyn .bss
01 .dynsym
Note that .bss has appeared in segment 00 for evm, whereas it was absent
for beagle, and that .dynsym was rejected to a second segment -- why? I
don't know.
Note: I've tried with putting input sections .rel.dyn and .dynsym into a
single output section .rel.dyn: this makes the second segment disappear,
but for evm the warning remains and .bss remains in the segment.
Amicalement,
--
Albert.
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