From 17e66ca9188b423eee35e6b4bf878e62d3879a04 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Petr=20Bene=C5=A1?= Date: Wed, 27 Aug 2025 10:28:44 +0200 Subject: [PATCH] tools: add sizeof_field and endof_field macros MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit * `sizeof_field` returns the size of a specific struct member * `endof_field` returns the offset to the end of the member within the struct It will be useful in upcoming layout checks of SMBIOS structs. Signed-off-by: Petr Beneš Acked-by: Anthony PERARD --- tools/include/xen-tools/common-macros.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/include/xen-tools/common-macros.h b/tools/include/xen-tools/common-macros.h index 0088208c2e..9838a108aa 100644 --- a/tools/include/xen-tools/common-macros.h +++ b/tools/include/xen-tools/common-macros.h @@ -83,6 +83,11 @@ #define __packed __attribute__((__packed__)) #endif +#define sizeof_field(type, member) sizeof(((type *)NULL)->member) + +#define endof_field(type, member) \ + (offsetof(type, member) + sizeof_field(type, member)) + #define container_of(ptr, type, member) ({ \ typeof(((type *)0)->member) *mptr__ = (ptr); \ (type *)((char *)mptr__ - offsetof(type, member)); \