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[PATCH] misra: allow using binary literals in c99 as an extension.
- To: xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Nicola Vetrini <nicola.vetrini@xxxxxxxxx>
- Date: Tue, 6 Jan 2026 18:50:08 +0100
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- Cc: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>, Doug Goldstein <cardoe@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Tue, 06 Jan 2026 17:50:48 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
From: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
There is consensus towards using more binary literals in Xen,
so they are enabled both for X86_64 and ARM64.
Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
---
automation/eclair_analysis/ECLAIR/toolchain.ecl | 5 +++++
docs/misra/C-language-toolchain.rst | 4 ++++
2 files changed, 9 insertions(+)
diff --git a/automation/eclair_analysis/ECLAIR/toolchain.ecl
b/automation/eclair_analysis/ECLAIR/toolchain.ecl
index 4bc88aa029..da00c2198a 100644
--- a/automation/eclair_analysis/ECLAIR/toolchain.ecl
+++ b/automation/eclair_analysis/ECLAIR/toolchain.ecl
@@ -332,3 +332,8 @@ ext_sizeof_alignof_void_type"
-doc_begin="See Section \"4.13 Preprocessing Directives\" of "GCC_MANUAL" and
Section \"11.1 Implementation-defined behavior\" of "CPP_MANUAL"."
-config=STD.inclexpd,behavior={c99, GCC_X86_64, "specified"}
-doc_end
+
+-doc_begin="See Section \"6.65 Binary Constants using the '0b' Prefix\" of
"GCC_MANUAL"."
+-config=STD.ltrlbin,behavior={c99, GCC_ARM64, "specified"}
+-config=STD.ltrlbin,behavior={c99, GCC_X86_64, "specified"}
+-doc_end
diff --git a/docs/misra/C-language-toolchain.rst
b/docs/misra/C-language-toolchain.rst
index ec0c9953be..5d418e262a 100644
--- a/docs/misra/C-language-toolchain.rst
+++ b/docs/misra/C-language-toolchain.rst
@@ -218,6 +218,10 @@ The table columns are as follows:
- All architectures
- See Section "6.3 Labels as Values" of GCC_MANUAL.
+ * - Binary constants
+ - ARM64, X86_64
+ - See Section "6.65 Binary Constants using the '0b' Prefix"
+
Translation Limits
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2.52.0
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