From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/lib/Kconfig.kgdb | 47 +++++++++++++++++++++++++++++++++++++++++++----
1 files changed, 43 insertions(+), 4 deletions(-)
diff --git a/kernel/lib/Kconfig.kgdb b/kernel/lib/Kconfig.kgdb
index ab4ff0e..05dae05 100644
--- a/kernel/lib/Kconfig.kgdb
+++ b/kernel/lib/Kconfig.kgdb
@@ -1,5 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-only
config HAVE_ARCH_KGDB
+ bool
+
+# set if architecture has the its kgdb_arch_handle_qxfer_pkt
+# function to enable gdb stub to address XML packet sent from GDB.
+config HAVE_ARCH_KGDB_QXFER_PKT
bool
menuconfig KGDB
@@ -17,6 +23,21 @@
unsure, say N.
if KGDB
+
+config KGDB_HONOUR_BLOCKLIST
+ bool "KGDB: use kprobe blocklist to prohibit unsafe breakpoints"
+ depends on HAVE_KPROBES
+ depends on MODULES
+ select KPROBES
+ default y
+ help
+ If set to Y the debug core will use the kprobe blocklist to
+ identify symbols where it is unsafe to set breakpoints.
+ In particular this disallows instrumentation of functions
+ called during debug trap handling and thus makes it very
+ difficult to inadvertently provoke recursive trap handling.
+
+ If unsure, say Y.
config KGDB_SERIAL_CONSOLE
tristate "KGDB: use kgdb over the serial console"
@@ -63,9 +84,9 @@
depends on X86 || MIPS
default n
help
- This will add an extra call back to kgdb for the breakpoint
- exception handler which will allow kgdb to step through a
- notify handler.
+ This will add an extra call back to kgdb for the breakpoint
+ exception handler which will allow kgdb to step through a
+ notify handler.
config KGDB_KDB
bool "KGDB_KDB: include kdb frontend for kgdb"
@@ -95,7 +116,7 @@
The config option merely sets the default at boot time. Both
issuing 'echo X > /sys/module/kdb/parameters/cmd_enable' or
- setting with kdb.cmd_enable=X kernel command line option will
+ setting with kdb.cmd_enable=X kernel command line option will
override the default settings.
config KDB_KEYBOARD
@@ -123,4 +144,22 @@
CONFIG_KDB_CONTINUE_CATASTROPHIC == 2. KDB forces a reboot.
If you are not sure, say 0.
+config ARCH_HAS_EARLY_DEBUG
+ bool
+ default n
+ help
+ If an architecture can definitely handle entering the debugger
+ when early_param's are parsed then it select this config.
+ Otherwise, if "kgdbwait" is passed on the kernel command line it
+ won't actually be processed until dbg_late_init() just after the
+ call to kgdb_arch_late() is made.
+
+ NOTE: Even if this isn't selected by an architecture we will
+ still try to register kgdb to handle breakpoints and crashes
+ when early_param's are parsed, we just won't act on the
+ "kgdbwait" parameter until dbg_late_init(). If you get a
+ crash and try to drop into kgdb somewhere between these two
+ places you might or might not end up being able to use kgdb
+ depending on exactly how far along the architecture has initted.
+
endif # KGDB
--
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