From 00725bd30ccc0f455a7d1fb8ada9fc789a6584da Mon Sep 17 00:00:00 2001 Message-ID: <00725bd30ccc0f455a7d1fb8ada9fc789a6584da.1752857321.git.sam@gentoo.org> In-Reply-To: <7f56d9ee24976d45babdc3856c85d47df2ae8a13.1752857321.git.sam@gentoo.org> References: <7f56d9ee24976d45babdc3856c85d47df2ae8a13.1752857321.git.sam@gentoo.org> From: Josh Poimboeuf Date: Wed, 16 Jul 2025 20:49:21 -0400 Subject: [PATCH 11/34] unwind_user/x86: Enable frame pointer unwinding on x86 Use ARCH_INIT_USER_FP_FRAME to describe how frame pointers are unwound on x86, and enable CONFIG_HAVE_UNWIND_USER_FP accordingly so the unwind_user interfaces can be used. Signed-off-by: Josh Poimboeuf Signed-off-by: Steven Rostedt (Google) --- arch/x86/Kconfig | 1 + arch/x86/include/asm/unwind_user.h | 11 +++++++++++ 2 files changed, 12 insertions(+) create mode 100644 arch/x86/include/asm/unwind_user.h diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 8bed9030ad473..7f46835238416 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -302,6 +302,7 @@ config X86 select HAVE_SYSCALL_TRACEPOINTS select HAVE_UACCESS_VALIDATION if HAVE_OBJTOOL select HAVE_UNSTABLE_SCHED_CLOCK + select HAVE_UNWIND_USER_FP if X86_64 select HAVE_USER_RETURN_NOTIFIER select HAVE_GENERIC_VDSO select VDSO_GETRANDOM if X86_64 diff --git a/arch/x86/include/asm/unwind_user.h b/arch/x86/include/asm/unwind_user.h new file mode 100644 index 0000000000000..8597857bf8965 --- /dev/null +++ b/arch/x86/include/asm/unwind_user.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_X86_UNWIND_USER_H +#define _ASM_X86_UNWIND_USER_H + +#define ARCH_INIT_USER_FP_FRAME \ + .cfa_off = (s32)sizeof(long) * 2, \ + .ra_off = (s32)sizeof(long) * -1, \ + .fp_off = (s32)sizeof(long) * -2, \ + .use_fp = true, + +#endif /* _ASM_X86_UNWIND_USER_H */ -- 2.50.1