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https://github.com/crash-utility/crash
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cf42161624
With Linux 5.4 and later kernels that contain commit
7e35b42591c058b91282f95ce3b2cf0c05ffe93d ("kbuild: remove SUBDIRS
support"), "make" command in the memory_driver directory doesn't
build crash memory driver module as expected. Add "M=" to fix.
Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
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| .. | ||
| crash.c | ||
| Makefile | ||
| README | ||
For live system analysis, the physical memory source must be one of the following devices: /dev/mem /proc/kcore /dev/crash If the live system kernel was configured with CONFIG_STRICT_DEVMEM or CONFIG_HARDENED_USERCOPY, then /dev/mem cannot be used. If the live system kernel was configured without CONFIG_PROC_KCORE, or if /proc/kcore is non-functional, then /proc/kcore cannot be used. The third alternative is this /dev/crash driver. Presuming that /lib/modules/`uname -r`/build points to a kernel build tree or kernel "devel" package tree, the module can simply be built and installed like so: # make ... # insmod crash.ko Once installed, the /dev/crash driver will be used by default for live system crash sessions.