Messages in this thread | | | Date | Tue, 16 Feb 2016 09:23:02 +0100 | From | Torsten Duwe <> | Subject | Re: [PATCH v8 8/8] livepatch: Detect offset for the ftrace location during build |
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On Tue, Feb 16, 2016 at 11:17:02AM +0530, Kamalesh Babulal wrote: > * Petr Mladek <pmladek@suse.com> [2016-02-12 17:45:17]: > > int test(int a) > > { > > + printk("%d\n", a); > > return ++a; > > } > > Thanks. This workaround, helped to load sample livepatch module.
N.b.: if you try to livepatch/trace such a leaf function without global dependencies, it will crash if that function got called with a different TOC value. Hence this whole testing.
You may alternatively try my gcc patch ;-)
Another caveat is functions with stack arguments (>8 args, varargs). My code needs special precautions then because of the return helper.
Torsten
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