On 10.05.17 15:41, Manfred Schlaegl wrote:
Using u-boot-2017.05 on i.MX6UL we ran into following problem: Initially U-Boot could be started normally. If we added one random command in configuration, the newly generated image hung at startup (last output was DRAM: 256 MiB).
We tracked this down to a data abort within relocation (relocated_code).
relocated_code in arch/arm/lib/relocate.S copies 8 bytes per loop iteration until the source pointer is equal to __image_copy_end. In a good case __image_copy_end was aligned to 8 bytes, so the loop stopped as suggested, but in an errornous case __image_copy_end was not aligned to 8 bytes, so the loop ran out of bounds and caused a data abort exception.
This patches solves the issue by aligning __image_copy_end to 8 byte using the linker script related to arm.
I don't know if it's the correct way to solve this, so some review would be very appreciated.
I think it makes sense, but needs a comment next to the ALIGN() command. Also please make sure you update all the other lds files as well, so that people don't run into it by accident.
Alex