From: Peter Zijlstra <peterz@infradead.org>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
alyssa.milburn@intel.com, scott.d.constable@intel.com,
joao@overdrivepizza.com, andrew.cooper3@citrix.com,
jpoimboe@kernel.org, jose.marchesi@oracle.com,
hjl.tools@gmail.com, ndesaulniers@google.com,
samitolvanen@google.com, nathan@kernel.org, ojeda@kernel.org,
kees@kernel.org, alexei.starovoitov@gmail.com
Subject: [PATCH 12/14] x86: Hacks for hacked up llvm
Date: Fri, 27 Sep 2024 21:49:08 +0200 [thread overview]
Message-ID: <20240927194925.603504509@infradead.org> (raw)
In-Reply-To: <20240927194856.096003183@infradead.org>
XXX do this nicely once the llvm hacks are done nice
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/x86/Kconfig | 8 ++++----
arch/x86/include/asm/linkage.h | 2 ++
2 files changed, 6 insertions(+), 4 deletions(-)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2444,10 +2444,10 @@ config CC_HAS_ENTRY_PADDING
config FUNCTION_PADDING_CFI
int
- default 59 if FUNCTION_ALIGNMENT_64B
- default 27 if FUNCTION_ALIGNMENT_32B
- default 11 if FUNCTION_ALIGNMENT_16B
- default 3 if FUNCTION_ALIGNMENT_8B
+ default 57 if FUNCTION_ALIGNMENT_64B
+ default 25 if FUNCTION_ALIGNMENT_32B
+ default 9 if FUNCTION_ALIGNMENT_16B
+ default 1 if FUNCTION_ALIGNMENT_8B
default 0
# Basically: FUNCTION_ALIGNMENT - 5*CFI_CLANG
--- a/arch/x86/include/asm/linkage.h
+++ b/arch/x86/include/asm/linkage.h
@@ -102,6 +102,8 @@
CFI_PRE_PADDING \
.byte 0xb8 ASM_NL \
.long __kcfi_typeid_##name ASM_NL \
+ .byte 0xb0 ASM_NL \
+ .byte 0x7f ASM_NL \
CFI_POST_PADDING \
SYM_FUNC_END(__cfi_##name)
next prev parent reply other threads:[~2024-09-27 19:50 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-27 19:48 [PATCH 00/14] x86/ibt: FineIBT-BHI Peter Zijlstra
2024-09-27 19:48 ` [PATCH 01/14] x86/cfi: Wreck things Peter Zijlstra
2024-09-27 23:15 ` Josh Poimboeuf
2024-09-28 13:31 ` Peter Zijlstra
2024-09-30 21:42 ` Josh Poimboeuf
2024-09-27 19:48 ` [PATCH 02/14] x86/boot: Mark start_secondary() with __noendbr Peter Zijlstra
2024-09-27 19:48 ` [PATCH 03/14] x86/alternative: Simplify callthunk patching Peter Zijlstra
2024-09-27 23:27 ` Josh Poimboeuf
2024-09-27 19:49 ` [PATCH 04/14] objtool/x86: Add .tail_call_sites Peter Zijlstra
2024-09-27 23:42 ` Josh Poimboeuf
2024-10-09 15:25 ` Peter Zijlstra
2024-10-10 4:55 ` Josh Poimboeuf
2024-09-27 19:49 ` [PATCH 05/14] objtool: Rename the skylake hack to --direct-call Peter Zijlstra
2024-09-27 19:49 ` [PATCH 06/14] x86/traps: Prepare for ENDBR poison UD1 usage Peter Zijlstra
2024-09-27 19:49 ` [PATCH 07/14] x86/ibt: Clean up is_endbr() Peter Zijlstra
2024-09-28 0:04 ` Josh Poimboeuf
2024-09-28 13:08 ` Peter Zijlstra
2024-09-29 17:32 ` Alexei Starovoitov
2024-09-30 8:30 ` Peter Zijlstra
2024-09-30 9:33 ` Peter Zijlstra
2024-09-30 16:43 ` Alexei Starovoitov
2024-09-30 20:58 ` Andrii Nakryiko
2024-09-27 19:49 ` [PATCH 08/14] x86/ibt: Clean up poison_endbr() Peter Zijlstra
2024-09-27 19:49 ` [PATCH 09/14] x86/ibt: Implement IBT+ Peter Zijlstra
2024-09-28 1:07 ` Josh Poimboeuf
2024-09-28 13:12 ` Peter Zijlstra
2024-09-29 17:38 ` Alexei Starovoitov
2024-09-30 8:23 ` Peter Zijlstra
2024-09-30 17:00 ` Alexei Starovoitov
2024-11-05 10:40 ` Peter Zijlstra
2024-09-27 19:49 ` [PATCH 10/14] x86/early_printk: Harden early_serial Peter Zijlstra
2024-09-27 19:49 ` [PATCH 11/14] llvm: kCFI pointer stuff Peter Zijlstra
2024-09-29 17:53 ` Alexei Starovoitov
2024-09-30 8:27 ` Peter Zijlstra
2024-09-30 16:59 ` Alexei Starovoitov
2024-10-01 10:21 ` Peter Zijlstra
2024-10-02 16:48 ` Alexei Starovoitov
2024-10-30 6:29 ` Constable, Scott D
2024-10-30 20:07 ` Constable, Scott D
2024-09-27 19:49 ` Peter Zijlstra [this message]
2024-09-27 19:49 ` [PATCH 13/14] x86: BHI stubs Peter Zijlstra
2024-09-28 1:37 ` Josh Poimboeuf
2024-09-28 13:23 ` Peter Zijlstra
2024-09-30 21:30 ` Josh Poimboeuf
2024-09-30 21:46 ` Josh Poimboeuf
2024-09-30 22:23 ` Andrew Cooper
2024-09-30 22:38 ` Josh Poimboeuf
2024-09-30 22:52 ` Andrew Cooper
2024-10-01 11:03 ` Peter Zijlstra
2024-10-01 11:20 ` Andrew Cooper
2024-10-03 12:17 ` Peter Zijlstra
2024-10-03 13:59 ` Andrew Cooper
2024-10-14 17:50 ` Constable, Scott D
2024-10-14 21:54 ` Andrew Cooper
2024-10-21 15:06 ` Constable, Scott D
2024-10-29 5:59 ` Joao Moreira
2024-09-27 19:49 ` [PATCH 14/14] x86/fineibt: Add FineIBT+BHI mitigation Peter Zijlstra
2024-09-28 1:50 ` Josh Poimboeuf
2024-09-28 13:16 ` Peter Zijlstra
2024-10-28 5:45 ` Constable, Scott D
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