Re: [PATCH v7 5/6] x86/vdso: Use CFI macros in __vdso_sgx_enter_enclave()

From
Jens Remus <hidden>
Date
2026-02-06 15:05:37
Also in
bpf, linux-mm, lkml
Reply to
Jens Remus, 2026-02-03
On 2/3/2026 6:19 PM, Jens Remus wrote:
quoted hunk ↗ jump to hunk
From: Josh Poimboeuf <jpoimboe@kernel.org>

Use the CFI macros instead of the raw .cfi_* directives to be consistent
with the rest of the VDSO asm.  It's also easier on the eyes.

No functional changes.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Jens Remus <redacted>
---
 arch/x86/entry/vdso/vdso64/vsgx.S | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/arch/x86/entry/vdso/vdso64/vsgx.S b/arch/x86/entry/vdso/vdso64/vsgx.S
index c0342238c976..8d7b8eb45c50 100644
--- a/arch/x86/entry/vdso/vdso64/vsgx.S
+++ b/arch/x86/entry/vdso/vdso64/vsgx.S
@@ -24,13 +24,14 @@
 .section .text, "ax"
 
 SYM_FUNC_START(__vdso_sgx_enter_enclave)
+	SYM_F_ALIGN
Somehow I missed Steven's v6 and any of it's review feedback, where Josh
noticed that this added SYM_F_ALIGN somehow creeped in and should be
dropped:
https://lore.kernel.org/all/amh7fzsjx4p5nowy3b3j6blkty5ojqf7jawtlslexwzdbxrhc3@zersgacmcnai/ (local)
quoted hunk ↗ jump to hunk
 	push	%rbp
-	.cfi_adjust_cfa_offset	8
-	.cfi_rel_offset		%rbp, 0
+	CFI_ADJUST_CFA_OFFSET	8
+	CFI_REL_OFFSET		%rbp, 0
 	mov	%rsp, %rbp
-	.cfi_def_cfa_register	%rbp
+	CFI_DEF_CFA_REGISTER	%rbp
 	push	%rbx
-	.cfi_rel_offset		%rbx, -8
+	CFI_REL_OFFSET		%rbx, -8
 
 	mov	%ecx, %eax
 .Lenter_enclave:
@@ -77,13 +78,11 @@ SYM_FUNC_START(__vdso_sgx_enter_enclave)
 .Lout:
 	pop	%rbx
 	leave
-	.cfi_def_cfa		%rsp, 8
+	CFI_DEF_CFA		%rsp, 8
 	RET
 
-	/* The out-of-line code runs with the pre-leave stack frame. */
-	.cfi_def_cfa		%rbp, 16
-
 .Linvalid_input:
+	CFI_DEF_CFA		%rbp, 16
 	mov	$(-EINVAL), %eax
 	jmp	.Lout
 
Regards,
Jens
-- 
Jens Remus
Linux on Z Development (D3303)
jremus@de.ibm.com / jremus@linux.ibm.com

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Thread (20 messages) 20 messages, 3 authors, last reply 2026-02-07
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