[PATCH v1] xen/riscv: make calculation of stack address PC-relative

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

The patch is needed to keep all addresses PC-relative.

Pseudoinstruction 'la' can be transformed to 'auipc/addi' or
'auipc/l{w|d}'. It depends on the .option directive: nopic and pic.

Right now, 'la' transforms to 'auipc/l{w|d}', which in case of
cpu0_boot_stack[] will lead to the usage of _GLOBAL_OFFSET_TABLE_
where all addresses will be without counting that it might happen
that linker address != load address.

To be sure that SP is loaded always PC-relative address
'la' should be changed to 'lla', which always transforms to
'auipc/addi'.

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
---
 xen/arch/riscv/riscv64/head.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/riscv/riscv64/head.S b/xen/arch/riscv/riscv64/head.S
index 8887f0cbd4..e12d2a7cf3 100644
--- a/xen/arch/riscv/riscv64/head.S
+++ b/xen/arch/riscv/riscv64/head.S
@@ -27,7 +27,7 @@ ENTRY(start)
         add     t3, t3, __SIZEOF_POINTER__
         bltu    t3, t4, .L_clear_bss
 
-        la      sp, cpu0_boot_stack
+        lla     sp, cpu0_boot_stack
         li      t0, STACK_SIZE
         add     sp, sp, t0
 
-- 
2.39.2