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Peter Anvin" , Mathieu Desnoyers , Kees Cook , Sam James , Andy Lutomirski Cc: Jens Remus , bpf@vger.kernel.org, linux-mm@kvack.org, Namhyung Kim , Andrii Nakryiko , "Jose E. Marchesi" , Beau Belgrave , Florian Weimer , "Carlos O'Donell" , Masami Hiramatsu , Jiri Olsa , Arnaldo Carvalho de Melo , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Heiko Carstens , Vasily Gorbik , Ilya Leoshkevich , "Steven Rostedt (Google)" Subject: [PATCH v10 3/6] x86/asm: Use CFI_* macros in SYM_FUNC_* macros so they can be added to VDSO Date: Tue, 5 May 2026 14:33:37 +0200 Message-ID: <20260505123340.3770025-4-jremus@linux.ibm.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260505123340.3770025-1-jremus@linux.ibm.com> References: <20260505123340.3770025-1-jremus@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=XPQAjwhE c=1 sm=1 tr=0 ts=69f9e3ad cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=HSAZBKcgB-AHDwtM:21 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=VwQbUJbxAAAA:8 a=meVymXHHAAAA:8 a=oGMlB6cnAAAA:8 a=VnNF1IyMAAAA:8 a=i3XSr9hboEKZ3AC0laIA:9 a=2JgSa4NbpEOStq-L5dxp:22 a=NdAtdrkLVvyUPsUoGJp4:22 X-Proofpoint-ORIG-GUID: 35CngOw5o1TcLHbOe1fTc6Tnvv3ir5zu X-Proofpoint-GUID: BAuJCiNjBlWBPSAQfA6QLGY-tMeDFuL1 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTA1MDExNCBTYWx0ZWRfXz11+5X+/XGVo MK6RIRalrORnpcTVrmZwhfOPU0vkULbu5nbxw0+YQUCRnxfYr/cI5QmUXQO9ERpATHop/VP2jjo E1uxGe6GftYqSecg61HhBTL6BwTZ0Bl5Iw9wTmWDQVsydgXjDWRSJauNS1ANwy9HIdA3N5ORJfn xMM6jBwQ/ufhOwfMH+U1aSD2M16Z/7kReoGfC4HFZ2pop5OJ5doWgRTLskRpjlUKfiaQYzUFMMt nJEK7eSCU3/ndieHj07QFdE8EQ1ZWZiqeulV08M3EQzlKGyVI9CsKvwEvlDpw3+5yIMd82L7qy8 EOMhqYH4/3vBTGRmBULqYGtTYxqHonatHwJSYj3sLvP/EPw6ye4q4gqbHjkASgtZZeRJUsgoxkL eFfUvOD43o0h7eoxSMNnaUgXluR4ucgWcFxfMXi/b/K1+dI6L3Chc34nAlovmPfKshs4y2ms98r DL6kq8VQT81YJuBSaFQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-05_02,2026-04-30_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 spamscore=0 priorityscore=1501 impostorscore=0 phishscore=0 malwarescore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605050114 From: Josh Poimboeuf Add CFI_STARTPROC and CFI_ENDPROC annotations to the SYM_FUNC_* macros so the VDSO asm functions don't need to add them manually. Note this only affects VDSO, the CFI_* macros are empty for the kernel proper. Signed-off-by: Josh Poimboeuf Signed-off-by: Steven Rostedt (Google) Acked-by: H. Peter Anvin (Intel) Signed-off-by: Jens Remus --- arch/x86/entry/vdso/common/vdso-layout.lds.S | 2 +- .../x86/entry/vdso/vdso64/vgetrandom-chacha.S | 2 -- arch/x86/entry/vdso/vdso64/vsgx.S | 4 --- arch/x86/include/asm/linkage.h | 33 +++++++++++++++---- arch/x86/include/asm/vdso.h | 1 - 5 files changed, 28 insertions(+), 14 deletions(-) diff --git a/arch/x86/entry/vdso/common/vdso-layout.lds.S b/arch/x86/entry/vdso/common/vdso-layout.lds.S index a1e30be3e83d..856b8b9d278c 100644 --- a/arch/x86/entry/vdso/common/vdso-layout.lds.S +++ b/arch/x86/entry/vdso/common/vdso-layout.lds.S @@ -1,5 +1,5 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#include +#include #include #include diff --git a/arch/x86/entry/vdso/vdso64/vgetrandom-chacha.S b/arch/x86/entry/vdso/vdso64/vgetrandom-chacha.S index cc82da9216fb..a33212594731 100644 --- a/arch/x86/entry/vdso/vdso64/vgetrandom-chacha.S +++ b/arch/x86/entry/vdso/vdso64/vgetrandom-chacha.S @@ -22,7 +22,6 @@ CONSTANTS: .octa 0x6b20657479622d323320646e61707865 * rcx: number of 64-byte blocks to write to output */ SYM_FUNC_START(__arch_chacha20_blocks_nostack) - CFI_STARTPROC .set output, %rdi .set key, %rsi .set counter, %rdx @@ -175,5 +174,4 @@ SYM_FUNC_START(__arch_chacha20_blocks_nostack) pxor temp,temp ret - CFI_ENDPROC SYM_FUNC_END(__arch_chacha20_blocks_nostack) diff --git a/arch/x86/entry/vdso/vdso64/vsgx.S b/arch/x86/entry/vdso/vdso64/vsgx.S index 37a3d4c02366..c0342238c976 100644 --- a/arch/x86/entry/vdso/vdso64/vsgx.S +++ b/arch/x86/entry/vdso/vdso64/vsgx.S @@ -24,8 +24,6 @@ .section .text, "ax" SYM_FUNC_START(__vdso_sgx_enter_enclave) - /* Prolog */ - .cfi_startproc push %rbp .cfi_adjust_cfa_offset 8 .cfi_rel_offset %rbp, 0 @@ -143,8 +141,6 @@ SYM_FUNC_START(__vdso_sgx_enter_enclave) jle .Lout jmp .Lenter_enclave - .cfi_endproc - _ASM_VDSO_EXTABLE_HANDLE(.Lenclu_eenter_eresume, .Lhandle_exception) SYM_FUNC_END(__vdso_sgx_enter_enclave) diff --git a/arch/x86/include/asm/linkage.h b/arch/x86/include/asm/linkage.h index a7294656ad90..c2ca8117376f 100644 --- a/arch/x86/include/asm/linkage.h +++ b/arch/x86/include/asm/linkage.h @@ -40,6 +40,10 @@ #ifdef __ASSEMBLER__ +#ifndef LINKER_SCRIPT +#include +#endif + #if defined(CONFIG_MITIGATION_RETHUNK) && !defined(__DISABLE_EXPORTS) && !defined(BUILD_VDSO) #define RET jmp __x86_return_thunk #else /* CONFIG_MITIGATION_RETPOLINE */ @@ -112,34 +116,51 @@ # define SYM_FUNC_ALIAS_MEMFUNC SYM_FUNC_ALIAS #endif +#define __SYM_FUNC_START \ + CFI_STARTPROC ASM_NL + +#define __SYM_FUNC_END \ + CFI_ENDPROC ASM_NL + /* SYM_TYPED_FUNC_START -- use for indirectly called globals, w/ CFI type */ #define SYM_TYPED_FUNC_START(name) \ SYM_TYPED_START(name, SYM_L_GLOBAL, SYM_F_ALIGN) \ + __SYM_FUNC_START \ ENDBR /* SYM_FUNC_START -- use for global functions */ #define SYM_FUNC_START(name) \ - SYM_START(name, SYM_L_GLOBAL, SYM_F_ALIGN) + SYM_START(name, SYM_L_GLOBAL, SYM_F_ALIGN) \ + __SYM_FUNC_START /* SYM_FUNC_START_NOALIGN -- use for global functions, w/o alignment */ #define SYM_FUNC_START_NOALIGN(name) \ - SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE) + SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE) \ + __SYM_FUNC_START /* SYM_FUNC_START_LOCAL -- use for local functions */ #define SYM_FUNC_START_LOCAL(name) \ - SYM_START(name, SYM_L_LOCAL, SYM_F_ALIGN) + SYM_START(name, SYM_L_LOCAL, SYM_F_ALIGN) \ + __SYM_FUNC_START /* SYM_FUNC_START_LOCAL_NOALIGN -- use for local functions, w/o alignment */ #define SYM_FUNC_START_LOCAL_NOALIGN(name) \ - SYM_START(name, SYM_L_LOCAL, SYM_A_NONE) + SYM_START(name, SYM_L_LOCAL, SYM_A_NONE) \ + __SYM_FUNC_START /* SYM_FUNC_START_WEAK -- use for weak functions */ #define SYM_FUNC_START_WEAK(name) \ - SYM_START(name, SYM_L_WEAK, SYM_F_ALIGN) + SYM_START(name, SYM_L_WEAK, SYM_F_ALIGN) \ + __SYM_FUNC_START /* SYM_FUNC_START_WEAK_NOALIGN -- use for weak functions, w/o alignment */ #define SYM_FUNC_START_WEAK_NOALIGN(name) \ - SYM_START(name, SYM_L_WEAK, SYM_A_NONE) + SYM_START(name, SYM_L_WEAK, SYM_A_NONE) \ + __SYM_FUNC_START + +#define SYM_FUNC_END(name) \ + __SYM_FUNC_END \ + SYM_END(name, SYM_T_FUNC) /* * Expose 'sym' to the startup code in arch/x86/boot/startup/, by emitting an diff --git a/arch/x86/include/asm/vdso.h b/arch/x86/include/asm/vdso.h index f2d49212ae90..bbe270483e3e 100644 --- a/arch/x86/include/asm/vdso.h +++ b/arch/x86/include/asm/vdso.h @@ -2,7 +2,6 @@ #ifndef _ASM_X86_VDSO_H #define _ASM_X86_VDSO_H -#include #include #include -- 2.51.0