From: "Edgar E. Iglesias" <edgar.igles...@xilinx.com>
Linking a U-boot larger than 1MB fails with PIE enabled:
u-boot/arch/arm/cpu/armv8/start.S:71:(.text+0x3c): relocation
truncated to fit: R_AARCH64_ADR_PREL_LO21 against symbol `__rel_dyn_end'
defined in .bss_start section in u-boot.
This extends the supported range by using adrp & add to load symbols
early while starting up.
Signed-off-by: Edgar E. Iglesias <edgar.igles...@xilinx.com>
---
arch/arm/cpu/armv8/start.S | 6 ++++--
arch/arm/lib/crt0_64.S | 3 ++-
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S
index 732bc385d4..335783014c 100644
--- a/arch/arm/cpu/armv8/start.S
+++ b/arch/arm/cpu/armv8/start.S
@@ -84,8 +84,10 @@ pie_fixup:
adr x0, _start /* x0 <- Runtime value of _start */
ldr x1, _TEXT_BASE /* x1 <- Linked value of _start */
sub x9, x0, x1 /* x9 <- Run-vs-link offset */
- adr x2, __rel_dyn_start /* x2 <- Runtime &__rel_dyn_start */
- adr x3, __rel_dyn_end /* x3 <- Runtime &__rel_dyn_end */
+ adrp x2, __rel_dyn_start /* x2 <- Runtime &__rel_dyn_start */
+ add x2, x2, #:lo12:__rel_dyn_start
+ adrp x3, __rel_dyn_end /* x3 <- Runtime &__rel_dyn_end */
+ add x3, x3, #:lo12:__rel_dyn_end
pie_fix_loop:
ldp x0, x1, [x2], #16 /* (x0, x1) <- (Link location, fixup) */
ldr x4, [x2], #8 /* x4 <- addend */
diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S
index 04afa518ac..f28071a238 100644
--- a/arch/arm/lib/crt0_64.S
+++ b/arch/arm/lib/crt0_64.S
@@ -102,7 +102,8 @@ ENTRY(_main)
adr lr, relocation_return
#if CONFIG_POSITION_INDEPENDENT
/* Add in link-vs-runtime offset */
- adr x0, _start /* x0 <- Runtime value of _start */
+ adrp x0, _start /* x0 <- Runtime value of _start */
+ add x0, x0, #:lo12:_start
ldr x9, _TEXT_BASE /* x9 <- Linked value of _start */
sub x9, x9, x0 /* x9 <- Run-vs-link offset */
add lr, lr, x9
--
2.25.1
