riscv: semihosting: correct alignment
Commit 7400d34ba992 ("riscv: semihosting: replace inline assembly with
assembly file") reduced the alignment of function smh_trap().
As described in the "RISC-V Semihosting" specification [1] the ssli,
ebreak, and srai statements must all reside in the same memory page.
[1] RISC-V Semihosting, Version 0.4, 12th June 2024
https://github.com/riscv-non-isa/riscv-semihosting
Fixes: 7400d34ba992 ("riscv: semihosting: replace inline assembly with assembly file")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/arch/riscv/lib/semihosting.S b/arch/riscv/lib/semihosting.S
index c0c571b..49bb419 100644
--- a/arch/riscv/lib/semihosting.S
+++ b/arch/riscv/lib/semihosting.S
@@ -8,7 +8,7 @@
.pushsection .text.smh_trap, "ax"
ENTRY(smh_trap)
- .align 2
+ .align 4 /* keep slli, ebreak, srai in same page */
.option push
.option norvc /* semihosting sequence must be 32-bit wide */