69 lines
1.8 KiB
Diff
69 lines
1.8 KiB
Diff
From 99fe993477b73fab9aeffb8ed96c79319f2abfff Mon Sep 17 00:00:00 2001
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From: Joel Severin <joel.severin@icemanor.se>
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Date: Sun, 14 Sep 2025 17:03:25 +0200
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Subject: [PATCH] Allow architecture-specific panic handling
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Debugging panics can be made much easier in hosted architectures (like
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Wasm) if they can intercept panic() calls right when they happen.
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---
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include/asm-generic/Kbuild | 1 +
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include/asm-generic/panic.h | 12 ++++++++++++
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kernel/panic.c | 3 +++
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3 files changed, 16 insertions(+)
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create mode 100644 include/asm-generic/panic.h
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diff --git a/include/asm-generic/Kbuild b/include/asm-generic/Kbuild
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index 941be574b..f1feb32a4 100644
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--- a/include/asm-generic/Kbuild
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+++ b/include/asm-generic/Kbuild
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@@ -42,6 +42,7 @@ mandatory-y += mmu_context.h
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mandatory-y += module.h
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mandatory-y += module.lds.h
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mandatory-y += msi.h
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+mandatory-y += panic.h
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mandatory-y += pci.h
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mandatory-y += percpu.h
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mandatory-y += pgalloc.h
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diff --git a/include/asm-generic/panic.h b/include/asm-generic/panic.h
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new file mode 100644
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index 000000000..5f1a0ac69
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--- /dev/null
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+++ b/include/asm-generic/panic.h
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@@ -0,0 +1,12 @@
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+/* SPDX-License-Identifier: GPL-2.0 */
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+
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+#ifndef _ASM_GENERIC_PANIC_H
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+#define _ASM_GENERIC_PANIC_H
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+
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+#ifndef CONFIG_ARCH_HAVE_PANIC_NOTIFY
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+static inline void arch_panic_notify(const char *msg)
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+{
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+}
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+#endif
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+
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+#endif /* _ASM_GENERIC_PANIC_H */
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diff --git a/kernel/panic.c b/kernel/panic.c
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index c990ada85..c2343cfc9 100644
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--- a/kernel/panic.c
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+++ b/kernel/panic.c
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@@ -36,6 +36,7 @@
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#include <linux/sysfs.h>
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#include <linux/context_tracking.h>
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#include <trace/events/error_report.h>
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+#include <asm/panic.h>
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#include <asm/sections.h>
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#define PANIC_TIMER_STEP 100
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@@ -397,6 +398,8 @@ void panic(const char *fmt, ...)
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panic_print_sys_info(true);
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+ arch_panic_notify(buf);
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+
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if (!panic_blink)
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panic_blink = no_blink;
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--
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2.25.1
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