From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Masami Hiramatsu <mhiramat@kernel.org>
Subject: [for-linus][PATCH 17/27] objtool: Add frame-pointer-specific function ignore
Date: Tue, 05 Oct 2021 09:57:50 -0400 [thread overview]
Message-ID: <20211005135828.704082376@goodmis.org> (raw)
In-Reply-To: 20211005135733.485175654@goodmis.org
From: Josh Poimboeuf <jpoimboe@redhat.com>
Add a CONFIG_FRAME_POINTER-specific version of
STACK_FRAME_NON_STANDARD() for the case where a function is
intentionally missing frame pointer setup, but otherwise needs
objtool/ORC coverage when frame pointers are disabled.
Link: https://lkml.kernel.org/r/163163047364.489837.17377799909553689661.stgit@devnote2
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Tested-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
include/linux/objtool.h | 12 ++++++++++++
tools/include/linux/objtool.h | 12 ++++++++++++
2 files changed, 24 insertions(+)
diff --git a/include/linux/objtool.h b/include/linux/objtool.h
index 7e72d975cb76..aca52db2f3f3 100644
--- a/include/linux/objtool.h
+++ b/include/linux/objtool.h
@@ -66,6 +66,17 @@ struct unwind_hint {
static void __used __section(".discard.func_stack_frame_non_standard") \
*__func_stack_frame_non_standard_##func = func
+/*
+ * STACK_FRAME_NON_STANDARD_FP() is a frame-pointer-specific function ignore
+ * for the case where a function is intentionally missing frame pointer setup,
+ * but otherwise needs objtool/ORC coverage when frame pointers are disabled.
+ */
+#ifdef CONFIG_FRAME_POINTER
+#define STACK_FRAME_NON_STANDARD_FP(func) STACK_FRAME_NON_STANDARD(func)
+#else
+#define STACK_FRAME_NON_STANDARD_FP(func)
+#endif
+
#else /* __ASSEMBLY__ */
/*
@@ -127,6 +138,7 @@ struct unwind_hint {
#define UNWIND_HINT(sp_reg, sp_offset, type, end) \
"\n\t"
#define STACK_FRAME_NON_STANDARD(func)
+#define STACK_FRAME_NON_STANDARD_FP(func)
#else
#define ANNOTATE_INTRA_FUNCTION_CALL
.macro UNWIND_HINT sp_reg:req sp_offset=0 type:req end=0
diff --git a/tools/include/linux/objtool.h b/tools/include/linux/objtool.h
index 7e72d975cb76..aca52db2f3f3 100644
--- a/tools/include/linux/objtool.h
+++ b/tools/include/linux/objtool.h
@@ -66,6 +66,17 @@ struct unwind_hint {
static void __used __section(".discard.func_stack_frame_non_standard") \
*__func_stack_frame_non_standard_##func = func
+/*
+ * STACK_FRAME_NON_STANDARD_FP() is a frame-pointer-specific function ignore
+ * for the case where a function is intentionally missing frame pointer setup,
+ * but otherwise needs objtool/ORC coverage when frame pointers are disabled.
+ */
+#ifdef CONFIG_FRAME_POINTER
+#define STACK_FRAME_NON_STANDARD_FP(func) STACK_FRAME_NON_STANDARD(func)
+#else
+#define STACK_FRAME_NON_STANDARD_FP(func)
+#endif
+
#else /* __ASSEMBLY__ */
/*
@@ -127,6 +138,7 @@ struct unwind_hint {
#define UNWIND_HINT(sp_reg, sp_offset, type, end) \
"\n\t"
#define STACK_FRAME_NON_STANDARD(func)
+#define STACK_FRAME_NON_STANDARD_FP(func)
#else
#define ANNOTATE_INTRA_FUNCTION_CALL
.macro UNWIND_HINT sp_reg:req sp_offset=0 type:req end=0
--
2.32.0
next prev parent reply other threads:[~2021-10-05 14:03 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-05 13:57 [for-linus][PATCH 00/27] tracing: Updates for 5.16 Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 01/27] kprobes: Do not use local variable when creating debugfs file Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 02/27] kprobes: Use helper to parse boolean input from userspace Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 03/27] kprobe: Simplify prepare_kprobe() by dropping redundant version Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 04/27] csky: ftrace: Drop duplicate implementation of arch_check_ftrace_location() Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 05/27] kprobes: Make arch_check_ftrace_location static Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 06/27] kprobes: treewide: Cleanup the error messages for kprobes Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 07/27] kprobes: Fix coding style issues Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 08/27] kprobes: Use IS_ENABLED() instead of kprobes_built_in() Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 09/27] kprobes: Add assertions for required lock Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 10/27] kprobes: treewide: Use kprobe_opcode_t * for the code address in get_optimized_kprobe() Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 11/27] kprobes: Use bool type for functions which returns boolean value Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 12/27] ia64: kprobes: Fix to pass correct trampoline address to the handler Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 13/27] kprobes: treewide: Replace arch_deref_entry_point() with dereference_symbol_descriptor() Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 14/27] kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler() Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 15/27] kprobes: treewide: Make it harder to refer kretprobe_trampoline directly Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 16/27] kprobes: Add kretprobe_find_ret_addr() for searching return address Steven Rostedt
2021-10-05 13:57 ` Steven Rostedt [this message]
2021-10-05 13:57 ` [for-linus][PATCH 18/27] objtool: Ignore unwind hints for ignored functions Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 19/27] x86/kprobes: Add UNWIND_HINT_FUNC on kretprobe_trampoline() Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 20/27] ARC: Add instruction_pointer_set() API Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 21/27] ia64: " Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 22/27] arm: kprobes: Make space for instruction pointer on stack Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 23/27] kprobes: Enable stacktrace from pt_regs in kretprobe handler Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 24/27] x86/kprobes: Push a fake return address at kretprobe_trampoline Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 25/27] x86/unwind: Recover kretprobe trampoline entry Steven Rostedt
2021-10-05 13:57 ` [for-linus][PATCH 26/27] tracing: Show kretprobe unknown indicator only for kretprobe_trampoline Steven Rostedt
2021-10-05 13:58 ` [for-linus][PATCH 27/27] x86/kprobes: Fixup return address in generic trampoline handler Steven Rostedt
2021-10-05 15:00 ` [for-linus][PATCH 00/27] tracing: Updates for 5.16 Steven Rostedt
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