devel@nongnu.org
Cc: peter.mayd...@linaro.org
Subject: Re: [PATCH 1/2] target/arm: Handle IC IVAU to improve compatibility
with JITs
Date: Sun, 11 Jun 2023 19:47:58 +0300
11.06.2023 14:53, John Högberg wrote:
...
>
> +#ifdef CONFIG_USER_ONLY
> +/*
> + * `IC IVAU` is handled to improve c
11.06.2023 14:53, John Högberg wrote:
...
+#ifdef CONFIG_USER_ONLY
+/*
+ * `IC IVAU` is handled to improve compatibility with JITs that dual-
map their
+ * code to get around W^X restrictions, where one region is writable
and the
+ * other is executable.
The patches seems to be line-wrap-dam
Unlike architectures with precise self-modifying code semantics
(e.g. x86) ARM processors do not maintain coherency for instruction
execution and memory, and require the explicit use of cache
management instructions as well as an instruction barrier to make
code updates visible (the latter on every
