change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

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