From: Thomas Gleixner tglx@linutronix.de
commit 8eb5d34e77c63fde8af21c691bcf6e3cd87f7829 upstream.
Create SYM_F_ALIGN to differentiate alignment requirements between SYM_CODE and SYM_FUNC.
This distinction is useful later when adding padding in front of functions; IOW this allows following the compiler's patchable-function-entry option.
[peterz: Changelog]
Change-Id: I4f9bc0507e5c3fdb3e0839806989efc305e0a758 Signed-off-by: Thomas Gleixner tglx@linutronix.de Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Link: https://lore.kernel.org/r/20220915111143.824822743@infradead.org [cascardo: adjust for missing commit c4691712b546 ("x86/linkage: Add ENDBR to SYM_FUNC_START*()")] Signed-off-by: Thadeu Lima de Souza Cascardo cascardo@igalia.com --- arch/x86/include/asm/linkage.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/linkage.h b/arch/x86/include/asm/linkage.h index 3d7293d52950..04a333c334ae 100644 --- a/arch/x86/include/asm/linkage.h +++ b/arch/x86/include/asm/linkage.h @@ -11,11 +11,15 @@ #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0))) #endif /* CONFIG_X86_32 */
-#ifdef __ASSEMBLY__ - #define __ALIGN .balign CONFIG_FUNCTION_ALIGNMENT, 0x90; #define __ALIGN_STR __stringify(__ALIGN)
+#define ASM_FUNC_ALIGN __ALIGN_STR +#define __FUNC_ALIGN __ALIGN +#define SYM_F_ALIGN __FUNC_ALIGN + +#ifdef __ASSEMBLY__ + #if defined(CONFIG_RETHUNK) && !defined(__DISABLE_EXPORTS) && !defined(BUILD_VDSO) #define RET jmp __x86_return_thunk #else /* CONFIG_RETPOLINE */