75 lines
2 KiB
Text
75 lines
2 KiB
Text
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menu "Kernel hacking"
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source "lib/Kconfig.debug"
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config EARLY_PRINTK
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bool "Early printk"
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depends on EMBEDDED && DEBUG_KERNEL
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default n
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help
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Write kernel log output directly into the VGA buffer or to a serial
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port.
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This is useful for kernel debugging when your machine crashes very
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early before the console code is initialized. For normal operation
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it is not recommended because it looks ugly and doesn't cooperate
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with klogd/syslogd or the X server. You should normally N here,
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unless you want to debug such a crash.
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config DEBUG_STACKOVERFLOW
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bool "Check for stack overflows"
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depends on DEBUG_KERNEL
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config DEBUG_PAGEALLOC
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bool "Page alloc debugging"
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depends on DEBUG_KERNEL
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help
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Unmap pages from the kernel linear mapping after free_pages().
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This results in a large slowdown, but helps to find certain types
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of memory corruptions.
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config GDBSTUB
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bool "Remote GDB kernel debugging"
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depends on DEBUG_KERNEL
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select DEBUG_INFO
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select FRAME_POINTER
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help
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If you say Y here, it will be possible to remotely debug the kernel
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using gdb. This enlarges your kernel ELF image disk size by several
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megabytes and requires a machine with more than 16 MB, better 32 MB
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RAM to avoid excessive linking time. This is only useful for kernel
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hackers. If unsure, say N.
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choice
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prompt "GDB stub port"
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default GDBSTUB_UART1
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depends on GDBSTUB
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help
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Select the on-CPU port used for GDB-stub
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config GDBSTUB_UART0
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bool "/dev/ttyS0"
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config GDBSTUB_UART1
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bool "/dev/ttyS1"
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endchoice
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config GDBSTUB_IMMEDIATE
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bool "Break into GDB stub immediately"
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depends on GDBSTUB
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help
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If you say Y here, GDB stub will break into the program as soon as
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possible, leaving the program counter at the beginning of
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start_kernel() in init/main.c.
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config GDB_CONSOLE
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bool "Console output to GDB"
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depends on GDBSTUB
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help
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If you are using GDB for remote debugging over a serial port and
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would like kernel messages to be formatted into GDB $O packets so
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that GDB prints them as program output, say 'Y'.
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endmenu
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