mirror of https://gitee.com/openkylin/linux.git
48 lines
1.5 KiB
Plaintext
48 lines
1.5 KiB
Plaintext
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menu "Kernel hacking"
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source "lib/Kconfig.debug"
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config STRICT_DEVMEM
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bool "Filter access to /dev/mem"
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depends on MMU
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---help---
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If this option is disabled, you allow userspace (root) access to all
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of memory, including kernel and userspace memory. Accidental
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access to this is obviously disastrous, but specific access can
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be used by people debugging the kernel.
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If this option is switched on, the /dev/mem file only allows
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userspace access to memory mapped peripherals.
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If in doubt, say Y.
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config EARLY_PRINTK
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def_bool DEBUG_OCD
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help
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Write kernel log output directly into the ocd or to a serial 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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# These options are only for real kernel hackers who want to get their hands dirty.
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config DEBUG_LL
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bool "Kernel low-level debugging functions"
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depends on DEBUG_KERNEL
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help
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Say Y here to include definitions of printascii, printch, printhex
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in the kernel. This is helpful if you are debugging code that
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executes before the console is initialized.
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config DEBUG_OCD
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bool "Kernel low-level debugging via On-Chip-Debugger"
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depends on DEBUG_LL
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default y
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help
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Say Y here if you want the debug print routines to direct their
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output to the UniCore On-Chip-Debugger channel using CP #1.
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endmenu
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