On Thu, Aug 03, 2023 at 04:12:18PM +0800, Kevin Chen wrote:
When PIE is enabled in start.S, u-boot/-spl use __rel_dyn_start and _rel_dyn_end symbol to be loaded to and executed at a different address than it was linked at.
u-boot-spl.lds is used in SPL build, but relocation information section(.rela*) were discarded. In line number 80 in arch/arm/cpu/armv8/u-boot-spl.lds /DISCARD/ : { *(.rela*) }
If PIE enabled in SPL, __rel_dyn_start which is defined as .rel_dyn_start in sections.c will be apended to the end of .bss section.
In our ASPEED case, size of .bss section would let .rel_dyn_start without 8-byte alignment, leading to alignment fault when executing ldp instuction in pie_fix_loop.
Signed-off-by: Kevin Chen kevin_chen@aspeedtech.com
Applied to u-boot/next, thanks!