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 <[email protected]>
---
arch/arm/cpu/armv8/start.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S
index f3ea858577..6cc1d26e5e 100644
--- a/arch/arm/cpu/armv8/start.S
+++ b/arch/arm/cpu/armv8/start.S
@@ -58,7 +58,7 @@ reset:
.globl save_boot_params_ret
save_boot_params_ret:
-#if CONFIG_POSITION_INDEPENDENT
+#if CONFIG_POSITION_INDEPENDENT && !defined(CONFIG_SPL_BUILD)
/* Verify that we're 4K aligned. */
adr x0, _start
ands x0, x0, #0xfff
--
2.41.0
