On 9/4/20 3:07 AM, Edgar E. Iglesias wrote:
From: "Edgar E. Iglesias" edgar.iglesias@xilinx.com
Mention the requirement of 4K aligned load addresses in the help section for the POSITION_INDEPENDENT option.
Suggested-by: Michal Simek michal.simek@xilinx.com Signed-off-by: Edgar E. Iglesias edgar.iglesias@xilinx.com
arch/arm/Kconfig | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index f30c2639ec..c144c08612 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -21,6 +21,9 @@ config POSITION_INDEPENDENT information that is embedded in the binary to support U-Boot relocating itself to the top-of-RAM later during execution.
When this option is enabled, U-Boot needs to be loaded at a4K aligned address.
I don't believe this restriction should be documented as part of POSITION_INDEPENDENT; the restriction always exists at least for 64-bit ARM, since arch/arm/lib/relocate_64.S relocate_code uses the same assembly sequence that imposes this restriction, and IIUC that code is unconditionally used.