On Tue, Jan 27, 2015 at 6:21 AM, Yue Chen <ycyc321_at_gmail.com> wrote: > My purpose is to modify kernel function instructions directly through > memory at runtime. > > First I use "objdump -S kernel" to see the function names and their > addresses. And then I use pointers to peek into the content at certain > function address area (.text segment). However, their content is different > from the result from "objdump -S kernel". I use a FreeBSD 10.1 kernel, > which has no ASLR supported as I know. > > Is it because that the kernel function addresses are relocated? Or some > kernel functions are not loaded into memory? Or is it not suitable to peek > kernel ".text" content from a kernel module? > > I only "objdump -S" the built "kernel" with debug symbols, not ".ko" files. Take a look at this branch: https://github.com/HardenedBSD/hardenedBSD/tree/hardened/current/intel-smap > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org"Received on Tue Jan 27 2015 - 12:14:30 UTC
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