Date: Thu, 12 Mar 2015 10:57 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-hackers@freebsd.org Cc: Yue Chen <ycyc321@gmail.com> Subject: Re: [Rebuild Kernel] Part of the kernel functions are not recompiled when rebuilding the kernel Message-ID: <2868982.gUMQ0OnoyR@ralph.baldwin.cx> In-Reply-To: <CAKtBrB5pgj_zYFeZyOvPKdfVkJdq2o5G9feNLfm84F%2Bq3%2BMMXg@mail.gmail.com> References: <CAKtBrB5pgj_zYFeZyOvPKdfVkJdq2o5G9feNLfm84F%2Bq3%2BMMXg@mail.gmail.com>
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On Monday, March 09, 2015 04:18:07 PM Yue Chen wrote: > Hi all, > > When I used my customized LLVM (insert some instructions after each basic > block) to rebuild the 10.1-RELEASE kernel, I found that about 10% of the > kernel functions (in a continuous address range, in "objdump -S kernel", > about 79%-88%) are not recompiled with my LLVM (does not have the feature > of my customized LLVM). For example, these functions: > > calc_rebuild_progress > ID_TO_VDEV > ldm_spinup_vdev > hpt27xx_ldm_suspend > ldm_start_rebuild > hptnr_ldm_acquire_lock > __ldm_finish_cmd > > I believe the rebuilding process would do a CLEAN first. Maybe something is > wrong with my building process? I followed the instructions here: > https://www.freebsd.org/doc/en/books/handbook/kernelconfig-building.html > > Or these functions are in kernel modules that are statically linked? Some drivers ship with pre-compiled .o files provided by external vendors and not the source. Several hpt drivers are this way, so I suspect that is what you are running into. -- John Baldwin
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