From: Noah Goldstein <goldstein.w.n@gmail.com>
To: libc-alpha@sourceware.org
Subject: [PATCH v1 1/2] x86: Modify ENTRY in sysdep.h so that p2align can be specified
Date: Tue, 21 Sep 2021 19:50:18 -0500 [thread overview]
Message-ID: <20210922005018.1542107-1-goldstein.w.n@gmail.com> (raw)
No bug.
This change adds a new macro ENTRY_P2ALIGN which takes a second
argument, log2 of the desired function alignment.
The old ENTRY(name) macro is just ENTRY_P2ALIGN(name, 4) so this
doesn't affect any existing functionality.
---
sysdeps/x86/sysdep.h | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/sysdeps/x86/sysdep.h b/sysdeps/x86/sysdep.h
index cac1d762fb..8d4f4b9fd2 100644
--- a/sysdeps/x86/sysdep.h
+++ b/sysdeps/x86/sysdep.h
@@ -78,15 +78,19 @@ enum cf_protection_level
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
/* Define an entry point visible from C. */
-#define ENTRY(name) \
+#define ENTRY_P2ALIGN(name, alignment) \
.globl C_SYMBOL_NAME(name); \
.type C_SYMBOL_NAME(name),@function; \
- .align ALIGNARG(4); \
+ .align ALIGNARG(12); \
+ .align ALIGNARG(alignment); \
C_LABEL(name) \
cfi_startproc; \
_CET_ENDBR; \
CALL_MCOUNT
+/* Common entry 16 byte aligns. */
+#define ENTRY(name) ENTRY_P2ALIGN (name, 4)
+
#undef END
#define END(name) \
cfi_endproc; \
--
2.25.1
next reply other threads:[~2021-09-22 0:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-22 0:50 Noah Goldstein [this message]
2021-09-22 0:50 ` [PATCH v1 2/2] x86: Optimize memcmp-evex-movbe.S for frontend behavior and size Noah Goldstein
2021-09-22 0:52 ` Noah Goldstein
2021-09-27 16:07 ` Noah Goldstein
2021-10-05 16:32 ` Noah Goldstein
2021-10-12 15:24 ` H.J. Lu
2021-10-12 17:43 ` Noah Goldstein
2022-04-23 1:17 ` Sunil Pandey
2021-09-22 5:16 ` [PATCH v2 1/2] x86: Modify ENTRY in sysdep.h so that p2align can be specified Noah Goldstein
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