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new ca92c208c1 arch/arm64: generate error if context size is not aligned
to 16bytes
ca92c208c1 is described below
commit ca92c208c1ba8879c79504834b5200d36f8d2741
Author: Neo Xu <[email protected]>
AuthorDate: Wed Feb 5 11:01:38 2025 +0800
arch/arm64: generate error if context size is not aligned to 16bytes
Make sure the registers context size is aligned to 16bytes as required by
armv8-a.
This issue has been reported earlier, thus make sense to make sure it won't
happen in future.
Signed-off-by: Neo Xu <[email protected]>
---
arch/arm64/include/irq.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/include/irq.h b/arch/arm64/include/irq.h
index 485d70492f..b07bab39b3 100644
--- a/arch/arm64/include/irq.h
+++ b/arch/arm64/include/irq.h
@@ -228,6 +228,10 @@
#define XCPTCONTEXT_REGS (ARM64_CONTEXT_REGS + FPU_CONTEXT_REGS)
#define XCPTCONTEXT_SIZE (8 * XCPTCONTEXT_REGS)
+#if XCPTCONTEXT_SIZE % 16 != 0
+# error "ARM64_CONTEXT_REGS and FPU_CONTEXT_REGS must be an even number to
ensure the stack is aligned to 16 bytes"
+#endif
+
/* Friendly register names */
#define REG_FP REG_X29
