From: Josh Poimboeuf <jpoimboe@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
Indu Bhagat <indu.bhagat@oracle.com>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
linux-perf-users@vger.kernel.org, Mark Brown <broonie@kernel.org>,
linux-toolchains@vger.kernel.org
Subject: [PATCH RFC 07/10] unwind/x86: Add HAVE_USER_UNWIND
Date: Wed, 8 Nov 2023 16:41:12 -0800 [thread overview]
Message-ID: <28efef61435d2fbb42bf26277adae0c630e05cf4.1699487758.git.jpoimboe@kernel.org> (raw)
In-Reply-To: <cover.1699487758.git.jpoimboe@kernel.org>
Use ARCH_INIT_USER_FP_FRAME to describe how frame pointers are unwound
on x86, and enable HAVE_USER_UNWIND accordinlgy so the user unwind
interfaces can be used.
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
---
arch/x86/Kconfig | 1 +
arch/x86/include/asm/user_unwind.h | 11 +++++++++++
2 files changed, 12 insertions(+)
create mode 100644 arch/x86/include/asm/user_unwind.h
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index cacf11ac4b10..95939cd54dfe 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -278,6 +278,7 @@ config X86
select HAVE_UACCESS_VALIDATION if HAVE_OBJTOOL
select HAVE_UNSTABLE_SCHED_CLOCK
select HAVE_USER_RETURN_NOTIFIER
+ select HAVE_USER_UNWIND
select HAVE_GENERIC_VDSO
select HOTPLUG_PARALLEL if SMP && X86_64
select HOTPLUG_SMT if SMP
diff --git a/arch/x86/include/asm/user_unwind.h b/arch/x86/include/asm/user_unwind.h
new file mode 100644
index 000000000000..caa6266abbb4
--- /dev/null
+++ b/arch/x86/include/asm/user_unwind.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_USER_UNWIND_H
+#define _ASM_X86_USER_UNWIND_H
+
+#define ARCH_INIT_USER_FP_FRAME \
+ .ra_off = sizeof(long) * -1, \
+ .cfa_off = sizeof(long) * 2, \
+ .fp_off = sizeof(long) * -2, \
+ .use_fp = true,
+
+#endif /* _ASM_X86_USER_UNWIND_H */
--
2.41.0
next prev parent reply other threads:[~2023-11-09 0:44 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-09 0:41 [PATCH RFC 00/10] perf: user space sframe unwinding Josh Poimboeuf
2023-11-09 0:41 ` [PATCH RFC 01/10] perf: Remove get_perf_callchain() 'init_nr' argument Josh Poimboeuf
2023-11-11 6:09 ` Namhyung Kim
2023-11-09 0:41 ` [PATCH RFC 02/10] perf: Remove get_perf_callchain() 'crosstask' argument Josh Poimboeuf
2023-11-11 6:11 ` Namhyung Kim
2023-11-11 20:53 ` Jordan Rome
2023-11-09 0:41 ` [PATCH RFC 03/10] perf: Simplify get_perf_callchain() user logic Josh Poimboeuf
2023-11-11 6:11 ` Namhyung Kim
2023-11-09 0:41 ` [PATCH RFC 04/10] perf: Introduce deferred user callchains Josh Poimboeuf
2023-11-11 6:57 ` Namhyung Kim
2023-11-11 18:49 ` Josh Poimboeuf
2023-11-11 18:54 ` Josh Poimboeuf
2023-11-13 16:56 ` Namhyung Kim
2023-11-13 17:21 ` Peter Zijlstra
2023-11-13 17:48 ` Namhyung Kim
2023-11-13 18:49 ` Peter Zijlstra
2023-11-13 19:16 ` Namhyung Kim
2023-11-15 16:13 ` Namhyung Kim
2023-11-20 14:03 ` Peter Zijlstra
2023-11-09 0:41 ` [PATCH RFC 05/10] perf/x86: Add HAVE_PERF_CALLCHAIN_DEFERRED Josh Poimboeuf
2023-11-09 0:41 ` [PATCH RFC 06/10] unwind: Introduce generic user space unwinding interfaces Josh Poimboeuf
2023-11-09 0:41 ` Josh Poimboeuf [this message]
2023-11-09 0:41 ` [PATCH RFC 08/10] perf/x86: Use user_unwind interface Josh Poimboeuf
2023-11-09 0:41 ` [PATCH RFC 09/10] unwind: Introduce SFrame user space unwinding Josh Poimboeuf
2023-11-09 19:31 ` Indu Bhagat
2023-11-09 19:37 ` Josh Poimboeuf
2023-11-09 19:49 ` Steven Rostedt
2023-11-09 19:53 ` Josh Poimboeuf
2023-11-09 0:41 ` [PATCH RFC 10/10] unwind/x86/64: Add HAVE_USER_UNWIND_SFRAME Josh Poimboeuf
2023-11-09 0:45 ` [PATCH RFC 00/10] perf: user space sframe unwinding Josh Poimboeuf
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