From: Richard Henderson <richard.henderson@linaro.org>
Date: Wed, 13 Sep 2023 00:18:37 +0000 (-0700)
Subject: accel/tcg: Validate placement of CPUNegativeOffsetState
X-Git-Tag: v8.2.0-rc0~89^2~34
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5d30bdcb1b72ec1d44397ee7047417617066d97a;p=thirdparty%2Fqemu.git

accel/tcg: Validate placement of CPUNegativeOffsetState

Verify that the distance between CPUNegativeOffsetState and
CPUArchState is no greater than any alignment requirements.

Reviewed-by: Anton Johansson <anjo@rev.ng>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---

diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h
index 230525ebf79..ed7747a5f16 100644
--- a/include/exec/cpu-all.h
+++ b/include/exec/cpu-all.h
@@ -457,6 +457,12 @@ static inline CPUState *env_cpu(CPUArchState *env)
     return &env_archcpu(env)->parent_obj;
 }
 
+/*
+ * Validate placement of CPUNegativeOffsetState.
+ */
+QEMU_BUILD_BUG_ON(offsetof(ArchCPU, env) - offsetof(ArchCPU, neg) >=
+                  sizeof(CPUNegativeOffsetState) + __alignof(CPUArchState));
+
 /**
  * env_neg(env)
  * @env: The architecture environment