From: madvenka@linux.microsoft.com
To: mark.rutland@arm.com, broonie@kernel.org, jpoimboe@redhat.com,
ardb@kernel.org, nobuta.keiya@fujitsu.com,
sjitindarsingh@gmail.com, catalin.marinas@arm.com,
will@kernel.org, jmorris@namei.org,
linux-arm-kernel@lists.infradead.org,
live-patching@vger.kernel.org, linux-kernel@vger.kernel.org,
madvenka@linux.microsoft.com
Subject: [PATCH v11 2/5] arm64: Rename unwinder functions
Date: Tue, 23 Nov 2021 13:37:20 -0600 [thread overview]
Message-ID: <20211123193723.12112-3-madvenka@linux.microsoft.com> (raw)
In-Reply-To: <20211123193723.12112-1-madvenka@linux.microsoft.com>
From: "Madhavan T. Venkataraman" <madvenka@linux.microsoft.com>
Rename unwinder functions for consistency and better naming.
- Rename start_backtrace() to unwind_start().
- Rename unwind_frame() to unwind_next().
- Rename walk_stackframe() to unwind().
Signed-off-by: Madhavan T. Venkataraman <madvenka@linux.microsoft.com>
---
arch/arm64/kernel/stacktrace.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
index 7217c4f63ef7..918852cd2681 100644
--- a/arch/arm64/kernel/stacktrace.c
+++ b/arch/arm64/kernel/stacktrace.c
@@ -33,8 +33,8 @@
*/
-static void start_backtrace(struct stackframe *frame, unsigned long fp,
- unsigned long pc)
+static void unwind_start(struct stackframe *frame, unsigned long fp,
+ unsigned long pc)
{
frame->fp = fp;
frame->pc = pc;
@@ -45,7 +45,7 @@ static void start_backtrace(struct stackframe *frame, unsigned long fp,
/*
* Prime the first unwind.
*
- * In unwind_frame() we'll check that the FP points to a valid stack,
+ * In unwind_next() we'll check that the FP points to a valid stack,
* which can't be STACK_TYPE_UNKNOWN, and the first unwind will be
* treated as a transition to whichever stack that happens to be. The
* prev_fp value won't be used, but we set it to 0 such that it is
@@ -63,8 +63,8 @@ static void start_backtrace(struct stackframe *frame, unsigned long fp,
* records (e.g. a cycle), determined based on the location and fp value of A
* and the location (but not the fp value) of B.
*/
-static int notrace unwind_frame(struct task_struct *tsk,
- struct stackframe *frame)
+static int notrace unwind_next(struct task_struct *tsk,
+ struct stackframe *frame)
{
unsigned long fp = frame->fp;
struct stack_info info;
@@ -104,7 +104,7 @@ static int notrace unwind_frame(struct task_struct *tsk,
/*
* Record this frame record's values and location. The prev_fp and
- * prev_type are only meaningful to the next unwind_frame() invocation.
+ * prev_type are only meaningful to the next unwind_next() invocation.
*/
frame->fp = READ_ONCE_NOCHECK(*(unsigned long *)(fp));
frame->pc = READ_ONCE_NOCHECK(*(unsigned long *)(fp + 8));
@@ -137,27 +137,27 @@ static int notrace unwind_frame(struct task_struct *tsk,
return 0;
}
-NOKPROBE_SYMBOL(unwind_frame);
+NOKPROBE_SYMBOL(unwind_next);
-static void notrace walk_stackframe(struct task_struct *tsk,
- unsigned long fp, unsigned long pc,
- bool (*fn)(void *, unsigned long), void *data)
+static void notrace unwind(struct task_struct *tsk,
+ unsigned long fp, unsigned long pc,
+ bool (*fn)(void *, unsigned long), void *data)
{
struct stackframe frame;
- start_backtrace(&frame, fp, pc);
+ unwind_start(&frame, fp, pc);
while (1) {
int ret;
if (!fn(data, frame.pc))
break;
- ret = unwind_frame(tsk, &frame);
+ ret = unwind_next(tsk, &frame);
if (ret < 0)
break;
}
}
-NOKPROBE_SYMBOL(walk_stackframe);
+NOKPROBE_SYMBOL(unwind);
static bool dump_backtrace_entry(void *arg, unsigned long where)
{
@@ -210,5 +210,5 @@ noinline notrace void arch_stack_walk(stack_trace_consume_fn consume_entry,
fp = thread_saved_fp(task);
pc = thread_saved_pc(task);
}
- walk_stackframe(task, fp, pc, consume_entry, cookie);
+ unwind(task, fp, pc, consume_entry, cookie);
}
--
2.25.1
next prev parent reply other threads:[~2021-11-23 19:37 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <8b861784d85a21a9bf08598938c11aff1b1249b9>
2021-11-23 19:37 ` [PATCH v11 0/5] arm64: Reorganize the unwinder and implement stack trace reliability checks madvenka
2021-11-23 19:37 ` [PATCH v11 1/5] arm64: Call stack_backtrace() only from within walk_stackframe() madvenka
2021-11-25 13:48 ` Mark Brown
2021-11-30 15:05 ` Mark Rutland
2021-11-30 17:13 ` Madhavan T. Venkataraman
2021-11-30 18:29 ` Mark Rutland
2021-11-30 20:29 ` Madhavan T. Venkataraman
2021-12-10 4:13 ` Madhavan T. Venkataraman
2021-11-23 19:37 ` madvenka [this message]
2021-11-24 17:10 ` [PATCH v11 2/5] arm64: Rename unwinder functions Mark Brown
2021-11-30 15:08 ` Mark Rutland
2021-11-30 17:15 ` Madhavan T. Venkataraman
2021-11-23 19:37 ` [PATCH v11 3/5] arm64: Make the unwind loop in unwind() similar to other architectures madvenka
2021-11-25 14:30 ` Mark Brown
2021-11-23 19:37 ` [PATCH v11 4/5] arm64: Introduce stack trace reliability checks in the unwinder madvenka
2021-11-25 14:56 ` Mark Brown
2021-11-25 16:59 ` Madhavan T. Venkataraman
2021-11-26 13:29 ` Mark Brown
2021-11-26 17:23 ` Madhavan T. Venkataraman
2021-11-23 19:37 ` [PATCH v11 5/5] arm64: Create a list of SYM_CODE functions, check return PC against list madvenka
2021-11-25 15:05 ` Mark Brown
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