[Xen-devel] [PATCH v2 17/62] x86: introduce ELFNOTE macro

[Wei Liu <wei.liu2@xxxxxxxxxx>]

It is needed later for introducing PVH entry point.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
v2:
1. Specify section attribute and type.
2. Use p2align.
3. Align instructions.
4. Haven't used .L or turned it into assembly macro.
---
 xen/include/asm-x86/asm_defns.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/xen/include/asm-x86/asm_defns.h b/xen/include/asm-x86/asm_defns.h
index 7e8838e49b..eb25097de5 100644
--- a/xen/include/asm-x86/asm_defns.h
+++ b/xen/include/asm-x86/asm_defns.h
@@ -336,4 +336,16 @@ static always_inline void stac(void)
 #define REX64_PREFIX "rex64/"
 #endif
 
+#define ELFNOTE(name, type, desc)           \
+    .pushsection .note.name, "a", @note   ; \
+    .p2align 2                            ; \
+    .long 2f - 1f       /* namesz */      ; \
+    .long 4f - 3f       /* descsz */      ; \
+    .long type          /* type   */      ; \
+1:  .asciz #name        /* name   */      ; \
+2:  .p2align 2                            ; \
+3:  desc                /* desc   */      ; \
+4:  .p2align 2                            ; \
+    .popsection
+
 #endif /* __X86_ASM_DEFNS_H__ */
-- 
2.11.0


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