boot2 overflow when building with clang

John Baldwin jhb at freebsd.org
Fri Mar 9 19:29:59 UTC 2012


On Thursday, March 08, 2012 7:16:52 pm Dimitry Andric wrote:
> On 2012-03-07 05:51, Jia-Shiun Li wrote:
> > I am not familiar with boot2, but it looks like allocated size for
> > boot2 is not enough to hold code generated by clang. Reverting r232570
> > fixes it.
> 
> Please test the attached diff.  Since it modifies bsd.sys.mk, either run
> "make install" in share/mk, or use "make buildenv" before rebuilding
> sys/boot/i386/boot2.
> 
> It would also be nice if you could test the actual installation of the
> bootstrap, and its proper operation.  However, be sure to have some way
> of recovering the first 16 sectors of your disk before you do so. :)

The changes to boot2.c are all bugs unfortunately.  boot2's bss is not zero'd.


-- 
John Baldwin


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