You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
2.7 KiB
68 lines
2.7 KiB
From a88781954a875c4f00883eba6a8c5d172c4f5c17 Mon Sep 17 00:00:00 2001
|
|
From: Nick Terrell <terrelln@fb.com>
|
|
Date: Wed, 13 Mar 2024 09:58:34 -0700
|
|
Subject: [PATCH] [asm][aarch64] Mark that BTI and PAC are supported
|
|
|
|
Mark that `huf_decompress_amd64.S` supports BTI and PAC, which it trivially does because it is empty for aarch64.
|
|
|
|
The issue only requested BTI markings, but it also makes sense to mark PAC, which is the only other feature.
|
|
|
|
Also run add a test for this mode to the ARM64 QEMU test. Before this PR it warns on `huf_decompress_amd64.S`, after it doesn't.
|
|
|
|
Fixes Issue #3841.
|
|
---
|
|
.github/workflows/dev-short-tests.yml | 1 +
|
|
lib/decompress/huf_decompress_amd64.S | 23 ++++++++++++++++++++++-
|
|
2 files changed, 23 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/.github/workflows/dev-short-tests.yml b/.github/workflows/dev-short-tests.yml
|
|
index b2aaff89cf7..5324b38d9ac 100644
|
|
--- a/.github/workflows/dev-short-tests.yml
|
|
+++ b/.github/workflows/dev-short-tests.yml
|
|
@@ -409,6 +409,7 @@ jobs:
|
|
- name: ARM64
|
|
if: ${{ matrix.name == 'ARM64' }}
|
|
run: |
|
|
+ LDFLAGS="-static -z force-bti" MOREFLAGS="-mbranch-protection=standard" CC=$XCC QEMU_SYS=$XEMU make clean check
|
|
LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make clean check
|
|
- name: PPC
|
|
if: ${{ matrix.name == 'PPC' }}
|
|
diff --git a/lib/decompress/huf_decompress_amd64.S b/lib/decompress/huf_decompress_amd64.S
|
|
index 3b96b44612f..78da291ee3c 100644
|
|
--- a/lib/decompress/huf_decompress_amd64.S
|
|
+++ b/lib/decompress/huf_decompress_amd64.S
|
|
@@ -10,11 +10,32 @@
|
|
|
|
#include "../common/portability_macros.h"
|
|
|
|
+#if defined(__ELF__) && defined(__GNUC__)
|
|
/* Stack marking
|
|
* ref: https://wiki.gentoo.org/wiki/Hardened/GNU_stack_quickstart
|
|
*/
|
|
-#if defined(__ELF__) && defined(__GNUC__)
|
|
.section .note.GNU-stack,"",%progbits
|
|
+
|
|
+#if defined(__aarch64__)
|
|
+/* Mark that this assembly supports BTI & PAC, because it is empty for aarch64.
|
|
+ * See: https://github.com/facebook/zstd/issues/3841
|
|
+ * See: https://gcc.godbolt.org/z/sqr5T4ffK
|
|
+ * See: https://lore.kernel.org/linux-arm-kernel/20200429211641.9279-8-broonie@kernel.org/
|
|
+ * See: https://reviews.llvm.org/D62609
|
|
+ */
|
|
+.pushsection .note.gnu.property, "a"
|
|
+.p2align 3
|
|
+.long 4 /* size of the name - "GNU\0" */
|
|
+.long 0x10 /* size of descriptor */
|
|
+.long 0x5 /* NT_GNU_PROPERTY_TYPE_0 */
|
|
+.asciz "GNU"
|
|
+.long 0xc0000000 /* pr_type - GNU_PROPERTY_AARCH64_FEATURE_1_AND */
|
|
+.long 4 /* pr_datasz - 4 bytes */
|
|
+.long 3 /* pr_data - GNU_PROPERTY_AARCH64_FEATURE_1_BTI | GNU_PROPERTY_AARCH64_FEATURE_1_PAC */
|
|
+.p2align 3 /* pr_padding - bring everything to 8 byte alignment */
|
|
+.popsection
|
|
+#endif
|
|
+
|
|
#endif
|
|
|
|
#if ZSTD_ENABLE_ASM_X86_64_BMI2
|