From: "Edgar E. Iglesias" edgar.iglesias@xilinx.com
This fixes some build issues with large (> 1MB) PIE U-Boot setups. We also document the 4K aligned load address requirement and add an early run-time check for it.
As requested by reviewers, I've also added a runtime check for non-PIE builds to trap the startup sequence early if the start address doesn't match between run-time and link-time.
Cheers, Edgar
ChangeLog: v2 -> v3: * Add non-PIE start address (run vs link-time) check * Move 4K aligment Kconfig help description * Fix load of __bss_start * Use x0 rather than x1 in PIE load-address check * Add missing tabs * Add load-address check for non-PIE * U-boot -> U-Boot in a few places * Tweak commit messages
v1 -> v2: * Fix adr of _start in arch/arm/lib/crt0_64.S * Add early check and bail out into a WFI loop when not 4K aligned * Document the 4K alignement requirement in Kconfig
Edgar E. Iglesias (4): arm64: Mention 4K aligned load addresses in the PIE Kconfig help arm64: Trap PIE builds early if load address is not 4K aligned arm64: Add support for larger PIE U-Boot arm64: Trap non-PIE builds early if starting from wrong address
arch/arm/Kconfig | 4 ++-- arch/arm/cpu/armv8/start.S | 36 ++++++++++++++++++++++++++++++++++-- arch/arm/lib/crt0_64.S | 8 +++++++- 3 files changed, 43 insertions(+), 5 deletions(-)