- It is opt-out for now so as to give it maximum testing, but it may be
turned opt-in for stable branches depending on the consensus. You
can turn it off with WITHOUT_SSP.
- WITHOUT_SSP was previously used to disable the build of GNU libssp.
It is harmless to steal the knob as SSP symbols have been provided
by libc for a long time, GNU libssp should not have been much used.
- SSP is disabled in a few corners such as system bootstrap programs
(sys/boot), process bootstrap code (rtld, csu) and SSP symbols themselves.
- It should be safe to use -fstack-protector-all to build world, however
libc will be automatically downgraded to -fstack-protector because it
breaks rtld otherwise.
- This option is unavailable on ia64.
Enable GCC stack protection (aka Propolice) for kernel:
- It is opt-out for now so as to give it maximum testing.
- Do not compile your kernel with -fstack-protector-all, it won't work.
Submitted by: Jeremie Le Hen <jeremie@le-hen.org>
a variety of bootloaders. This sometimes means that different loader
scripts are required within one ${MACHINE_ARCH}, which makes the
current practice of using ldscript.${MACHINE_ARCH} unsuitable.
Instead, make the default the current convention and allow the ld
scripts to be overridden as necessary.
If we aren't arm, pc98 or sun4v, then enable treating warnings like
errors. That doesn't mean these platforms aren't -Werror clean, just
that we haven't enforced it before. Someone with some spare time
should investigate these three platforms to see if any can be removed.
shared code infrastructure that is family specific and
modular. There is also support for our latest gigabit
nic, the 82575 that is MSI/X and multiqueue capable.
The new shared code changes some interfaces to the core
code but testing at Intel has been going on for months,
it is fairly stable.
I have attempted to be careful in retaining any fixes that
CURRENT had and we did not, I apologize in advance if any
thing gets clobbered, I'm sure I'll hear about it :)
Approved by pdeuskar
i386). Use -mprofiler-epilogue again, and don't use -finstrument-functions.
The former has been fixed for arches that implement high-res profiling,
and the latter has been useless for kernel profiling since gcc-3.4
when it started forcing -fno-inline. -fno-inline gives a kernel with
performance characteristics too different from a normal kernel to be
worth profiling, by turning off inlining of all the little optimized
functions in headers. This interacts especially badly with FreeBSD's
use of "static inline" for all inlines in headers, by creating many
separate copies of the little functions, so not inlining tends to
increase cache pressure where it should reduce it, and (since gprof(1)
doesn't understand the copies) the statistics for the little functions
are hard to interpret even if you want them.
part of the hal distribution early on when the hal was built for
each os but it's been portable for a long time so move the os-specific
code out (and off the vendor branch)
o correct the copyright on ah_osdep.?; it was mistakenly given a
restricted license and not a dual-bsd/gpl license
o remove the module api definition as it was never used
o fixup include paths for move of ah_osdep.h
MFC after: 2 weeks
modules along with kernel.
After this change it is possible to embrace opt_*.h includes with ifdef
HAVE_KERNEL_OPTION_HEADERS. And thus, avoid editing a lot of Makefiles
in modules directory each time we introduce a new opt_xxx.h.
Requested by: bde
Also, move the -I stuff to the centralized kern.pre.mk. However, it
might be better to add these flags to files.conf. This is a short
term fix to fix the broken builds on my machine (I don't have a valid
/sys link).
provides truer debugger stack traces. For those that want to stick with
-O2 kernel builds, one should probably add -fno-optimize-sibling-calls
so that each stack frame as a frame pointer.
It is semi-promissed by the Release Engineers that when RELENG_6 is
created we go back to -O2.
Desired by: scottl, jhb
problem I had but it's happening in code that is messing around with
register windows - I'm willing to live with that piece being sensitive
to this and it looks like the other problems we had reported lately
are not fixed by using -O instead of -O2.
Sorry for the churn. Looks like I need a second pointy hat. Someone
tells me they stack well. :-))))
-O2 on kernel compiles after all. While working on adding a KASSERT
to sparc64/sparc64/rwindow.c I found that it was "position sensitive",
putting it above a call to flushw() instead of below caused corruption
of processes on the system. jake and jhb have both confirmed there is
no obvious explanation for that. The exact same kernel code does not
have the process corruption problem if compiled with -O instead of -O2.
There have been signs of similar issues floated on the sparc64@ mailing
list, lets see if this helps make them go away.
Note this isn't an optimal fix as far as the file format goes, if this
disgusts too many people I'll fix it the right way. Since compiling
with something other than -O is a known problem this format would prevent
a change to the default causing grief. And this may also help motivate
finding out what the compiler is doing wrong so we can shift back to
using -O2. :-)
My turn for the pointy hat... One of the florescent ones...
MFC after: 2 days
your (network) modules as well as any userland that might make sense of
sizeof(struct ifnet).
This does not change the queueing yet. These changes will follow in a
seperate commit. Same with the driver changes, which need case by case
evaluation.
__FreeBSD_version bump will follow.
Tested-by: (i386)LINT
