From: Joao Moreira <joao.moreira@intel.com>
To: musl@lists.openwall.com
Subject: [musl] [PATCH 2/4] Add ENDBRANCH64 and ENDBRANCH32 macro definitions
Date: Mon, 19 Oct 2020 15:43:40 -0700 [thread overview]
Message-ID: <20201019224342.53303-3-joao.moreira@intel.com> (raw)
In-Reply-To: <20201019224342.53303-1-joao.moreira@intel.com>
Define ENDBRANCH64 and ENDBRANCH32 macros to endbr64 and endbr32 instructions,
respectively, in case the flag CET_IBT is set. If the flag is not set, the
macros are defined to nothing.
These macros will later be used to properly add endbranch instruction to
x86 and i386 assembly functions.
Signed-off-by: Joao Moreira <joao.moreira@intel.com>
---
src/include/ibt.s | 13 +++++++++++++
1 file changed, 13 insertions(+)
create mode 100644 src/include/ibt.s
diff --git a/src/include/ibt.s b/src/include/ibt.s
new file mode 100644
index 00000000..2f16006f
--- /dev/null
+++ b/src/include/ibt.s
@@ -0,0 +1,13 @@
+.ifdef CET_IBT
+ .macro ENDBRANCH64
+ endbr64
+ .endm
+ .macro ENDBRANCH32
+ endbr32
+ .endm
+.else
+ .macro ENDBRANCH64
+ .endm
+ .macro ENDBRANCH32
+ .endm
+.endif
--
2.27.0
next prev parent reply other threads:[~2020-10-19 22:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-19 22:43 [musl] [PATCH 0/4] Add CET IBT Support to MUSL Joao Moreira
2020-10-19 22:43 ` [musl] [PATCH 1/4] Support ASFLAGS in configure and Makefile Joao Moreira
2020-10-19 22:43 ` Joao Moreira [this message]
2020-10-19 22:43 ` [musl] [PATCH 3/4] Add endbr64 to x86_64 assembly functions Joao Moreira
2020-10-19 22:43 ` [musl] [PATCH 4/4] Add endbr32 to i386 " Joao Moreira
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