Changeset abb70fc3 in mainline

Timestamp:

2023-10-22T16:41:50Z (13 months ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

b7493ea0

Parents:

590cb6d2

git-author:

Vojtech Horky <vojtech.horky@…> (2023-07-13 19:21:47)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2023-10-22 16:41:50)

Message:

Silence compiler when accessing low memory addresses

File:

• kernel/meson.build (modified) (1 diff)

kernel/meson.build

@@ -101 +101 @@
 kernel_c_args = arch_kernel_c_args + kernel_defs + [
         '-ffreestanding',
-        # TODO: remove this flag
-        cc.get_supported_arguments([ '-Wno-cast-function-type' ]),
+
+        cc.get_supported_arguments([
+                # TODO: remove this flag
+                '-Wno-cast-function-type',
+
+                # When accessing specific memory addresses that are below
+                # normal page size, the compiler may assume that we actually
+                # dereferenced NULL pointer and warns us about that.
+                # But in kernel we often need to access these addresses
+                # directly hence we need to ignore these warnings.
+                #
+                # TODO: might make more sense to disable this selectively
+                # in specific files (or better yet, for specific lines).
+                '--param=min-pagesize=0',
+        ]),
 ]