----- Original Message ----- > I'm trying to add crash support for kdumps from kASLR'd kernels. I've > got it working with a few small changes and I wanted to solicit > comments before sending a patch. Excellent! > 1) The --reloc flag appears to specify an offset to be subtracted from > the loaded address, when the aslr offset is added. It's annoying to > try to specify negative numbers on the command line, so I'd like to > add another argument --aslr which is the same as --reloc but negates > the value. Not a problem. In fact, since they really are different concepts, I'd prefer it. But can you make it --kalsr? A couple questions -- how would the user know what the offset is? And I had thought that the upstream discussion was geared towards making it work automatically -- at least with kdump dumpfiles -- such that the kASLR offset would be made a VMCOREINFO item? > 2) There are some symbols which should not be relocated. Specifically > the per_cpu section symbols are zero based offsets which should not > have the offset apply. Additionally there are VDSO symbols which are > fixed even with kASLR enabled. To fix this I'd like to add code to > iterate through the section and find the end of the last section and > only apply the relocation value to values after the start of text but > before the end of the last section. Right... > thanks, > Andy Good to hear from you -- I figured that when I saw your subscription request, with it being the first/only "google.com" address ever, that something interesting was forthcoming... Thanks, Dave Anderson -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
