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129 lines
3.8 KiB
129 lines
3.8 KiB
menu "Kernel hacking"
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config TRACE_IRQFLAGS_SUPPORT
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def_bool y
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config DEBUG_VERBOSE
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bool "Verbose fault messages"
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default y
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select PRINTK
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help
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When a program crashes due to an exception, or the kernel detects
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an internal error, the kernel can print a not so brief message
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explaining what the problem was. This debugging information is
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useful to developers and kernel hackers when tracking down problems,
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but mostly meaningless to other people. This is always helpful for
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debugging but serves no purpose on a production system.
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Most people should say N here.
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config PROTECT_KERNEL
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default y
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bool 'Enable Kernel range register Protection'
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help
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Adds code to enable/disable range registers to protect static
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kernel code/data from userspace. Currently the ranges covered
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do no protect kernel loadable modules or dynamically allocated
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kernel data.
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config NO_KERNEL_MSG
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bool "Suppress Kernel BUG Messages"
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help
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Do not output any debug BUG messages within the kernel.
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config EARLY_PRINTK
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bool "Use the driver that you selected as console also for early printk (to debug kernel bootup)."
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default n
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help
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If you want to use the serdes driver (console=ttyUS0) for
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early printk, you must also supply an additional kernel boot
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parameter like this:
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serdes=ioportaddr,irq,clockrate,baud
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For an IP7160RGW eval board, you could use this:
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serdes=0x2004000,61,250000000,57600
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which will let you see early printk output at 57600 baud.
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config STOP_ON_TRAP
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bool "Enable stopping at the LDSR for all traps"
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default n
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help
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Cause the LDSR to stop all threads whenever a trap is about to be serviced
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config STOP_ON_BUG
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bool "Enable stopping on failed BUG_ON()"
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default n
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help
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Cause all BUG_ON failures to stop all threads
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config DEBUG_IRQMEASURE
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bool "Enable IRQ handler measurements"
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default n
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help
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When enabled each IRQ's min/avg/max times will be printed. If the handler
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re-enables interrupt, the times will show the full time including to service
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nested interrupts. See /proc/irq_measurements.
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config DEBUG_PCIMEASURE
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bool "Enable PCI transaction measurements"
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default n
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help
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When enabled the system will measure the min/avg/max timer for each PCI transactions.
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See /proc/pci_measurements.
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config ACCESS_OK_CHECKS_ENABLED
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bool "Enable user space access checks"
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default n
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help
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Enabling this check causes the kernel to verify that addresses passed
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to the kernel by the user space code are within the processes
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address space. On a no-mmu system, this is done by examining the
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processes memory data structures (adversly affecting performance) but
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ensuring that a process does not ask the kernel to violate another
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processes address space. Sadly, the kernel uses access_ok() for
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address that are in the kernel which results in a large volume of
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false positives.
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choice
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prompt "Unaligned Access Support"
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default UNALIGNED_ACCESS_ENABLED
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help
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Kernel / Userspace unaligned access handling.
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config UNALIGNED_ACCESS_ENABLED
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bool "Kernel and Userspace"
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help
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config UNALIGNED_ACCESS_USERSPACE_ONLY
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bool "Userspace Only"
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help
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config UNALIGNED_ACCESS_DISABLED
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bool "Disabled"
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help
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endchoice
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config DEBUG_STACKOVERFLOW
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bool "Check for stack overflows"
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default n
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depends on DEBUG_KERNEL
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help
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This option will cause messages to be printed if free kernel stack space
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drops below a certain limit (THREAD_SIZE /8).
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config DEBUG_STACK_USAGE
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bool "Stack utilization instrumentation"
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default n
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depends on DEBUG_KERNEL
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help
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Enables the display of the minimum amount of free kernel stack which each
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task has ever had available in the sysrq-T and sysrq-P debug output.
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This option will slow down process creation somewhat.
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source "lib/Kconfig.debug"
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endmenu
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