Re: [Crash-utility] [PATCH 0/2] Generalize KASLR calculation and use it for KDUMPs

Commit 45b74b89530d611b3fa95a1041e158fbb865fa84 added support for calculating phys_base and kernel offset for KASLR-enabled kernels on SADUMPs by using a technique developed by Takao Indoh. Originally, the patchset included support for KDUMPs, but this was dropped in v2, as it was deemed unnecessary due to the implementation of the vmcoreinfo device in QEMU. Sadly, there are many reasons for which the vmcoreinfo device may not be present in the moment of taking the memory dump from a VM, ranging from a Host running older QEMU/libvirt versions, to misconfigured VMs or environments running Hypervisors that doesn't support this device. This patchset generalizes the kaslr related functions from sadump.c moving them to kaslr_helper.c, and makes KDUMP analysis fallback to KASLR offset calculation if vmcoreinfo data is missing. These changes have been successfully tested with a 3.10.0-830.el7.x86_64 under the following conditions: - kdump with KASLR and vmcoreinfo - kdump with KASLR but no vmcoreinfo - kdump without KASLR ("nokaslr" kernel command line option) It was also tested that a "crash" patched with these changes still builds and runs (live and kdump debugging) on an aarch64 machine. Sergio Lopez (2): Move kaslr related functions from sadump.c to kaslr_helper.c kdump: if vmcoreinfo is missing, try to infer kaslr offset Makefile | 7 +- defs.h | 15 ++ kaslr_helper.c | 466 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ netdump.c | 73 +++++++++ netdump.h | 1 + sadump.c | 487 +++++---------------------------------------------------- symbols.c | 29 ++-- x86_64.c | 14 +- 8 files changed, 629 insertions(+), 463 deletions(-) create mode 100644 kaslr_helper.c -- 2.14.3