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You must build the kernel with the following configuration options. Not that =y means they must be enabled, and =n means  means they just be disabled. Please use menuconfig to confirm each one.

Note that some of these configurations can only be enabled if CONFIG_EXPERT=y.

• CONFIG_DEBUG_INFO=y
• CONFIG_DEBUG_INFO_REDUCED=n
• CONFIG_DEBUG_INFO_SPLIT=n
• CONFIG_RANDOMIZE_BASE=n
• CONFIG_EXPERT=y
• CONFIG_UNMAP_KERNEL_AT_EL0=n

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To debug modules:

• CONFIG_KALLSYMS=y

To make sure the HW breakpoint resources are not touched during boot :(as in, when the kernel boots, it clears all hardware breakpoints)

• CONFIG_CORESIGHT=n
• PERF_EVENTS=n

To remove code optimization:

• Because of the default compiler optimization level (-O2), stepping thru the code may be problematic / unpredictable. Using menuconfig you can only select between -O2 and -Os (CC_OPTIMIZE_FOR_PERFORMANCE, CC_OPTIMIZE_FOR_SIZE). There's also a relatively new CC_OPTIMIZE_FOR_PERFORMANCE_O3 to select -O3 but no real way to choose a lower optimization level. It is not mandatory but to get a code flow that is easier to follow, you can manually hack the main Makefile (the one at the base of the source tree) and turn -O2 into -O1:

Kernel Boot Arguments:

You need to add the follow to your kernel boot arguments:

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