Commit Graph

58 Commits

Author SHA1 Message Date
Warner Losh
e0a04e7474 Bump down the inline limit on MIPS. 2009-03-03 18:53:47 +00:00
Nathan Whitehorn
5b4975b180 Explicitly disable generation of Altivec instructions in the kernel on PowerPC,
and add support to allow users to set their CPUTYPE in make.conf.
2009-02-22 18:45:30 +00:00
Warner Losh
a30c29f9f5 Disable SSP for mips until support is added to the base architecture. 2008-07-23 06:16:34 +00:00
Olivier Houchard
7cff8ceafb Disable SSP for the kernel on arm as well (see rev 180605).
I overlooked this because a SSP kernel booted for me.

Apologises to:	ticso
2008-07-22 09:38:12 +00:00
Ruslan Ermilov
042df2e2da Enable GCC stack protection (aka Propolice) for userland:
- 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>
2008-06-25 21:33:28 +00:00
Andrey A. Chernov
64982acf50 Add -mno-sse3 for amd64 case too
PR:             123518
Submitted by:   Marc Olzheim <marcolz@stack.nl>
2008-05-10 20:46:07 +00:00
Oleksandr Tymoshenko
578328c977 Define INLINE_LIMIT and additional CFLAGS for mips.
Approved by:	cognet (mentor)
2008-04-29 11:28:10 +00:00
David E. O'Brien
9eef6e338b Temporarily add 'WITH_GCC3' that removes -Wno-pointer-sign from the
compiler invocation.  This is just to help get over the hump of people
tracking down bugs that may cross the GCC 4.2 upgrade.
It is envisioned that this option goes away after a suitable amount
of time.
2007-05-24 21:53:42 +00:00
Alexander Kabaev
42f17ea912 Add -Wno-pointer-sign to CWARNFLAGS.
Switch ia64 kernels to -fpic. This is likely wrong, but at least gets
ia64 kernels to compile and link with GCC 4.2. The previous -mno-sdata
trick is not working anymore.
2007-05-19 04:45:54 +00:00
Kip Macy
f592bb74a5 Fix module loading for sparc on machines with greater than 1GB of RAM
t1# uname -m
sparc64
t1# sysctl hw.physmem
hw.physmem: 17150509056
t1# kldload reiserfs
t1# kldstat
Id Refs Address            Size     Name
 1    3 0xc0000000 58cc38   kernel
 2    1 0xcbe70000 234000   xfs.ko
 3    1 0xcc0b6000 110000   reiserfs.ko
2006-11-26 23:16:46 +00:00
David E. O'Brien
1de763bd77 Create new dialect knob, as setting the language dialect isn't a warning flag. 2006-06-29 21:15:25 +00:00
Ruslan Ermilov
a2f3563e84 Enable -Wundef warnings for kernel/module compiles. From cpp.info:
`-Wundef'
     Warn whenever an identifier which is not a macro is encountered in
     an `#if' directive, outside of `defined'.  Such identifiers are
     replaced with zero.
2006-05-30 19:18:01 +00:00
John Baldwin
67ab9fd759 First pass at removing Alpha kernel support. 2006-05-11 22:25:28 +00:00
Andrey A. Chernov
64b3210d91 Add -mno-sse3 for prescott/nocona 2005-07-15 11:45:30 +00:00
Peter Wemm
8d2046fa1e Since the question keeps coming up, explain why the -mno-sse etc switches
are there and that it does not have an effect on user applications.
2005-03-31 22:53:58 +00:00
David E. O'Brien
0c3a1acbbb Remove OBE comment about AMD64 memory model. 2005-03-15 18:44:51 +00:00
David E. O'Brien
0ed36875f4 Ensure GCC does not use FP registers in integer code.
I think all we really need is -fno-sse2.
I really don't like cluttering up the compiler invocation,
but this bigger hammer will fix reported problems for now.
2005-03-15 18:43:36 +00:00
Olivier Houchard
d6301dcdbb Define INLINE_LIMIT for arm. 2004-05-14 13:35:46 +00:00
Tom Rhodes
06d6e4fcfe This are the build infrastructure changes to allow to use the
Intel C/C++ compiler (lang/icc) to build the kernel.

The icc CPUTYPE CFLAGS use icc v7 syntax, icc v8 moans about them, but
doesn't abort. They also produce CPU specific code (new instructions
of the CPU, not only CPU specific scheduling), so if you get coredumps
with signal 4 (SIGILL, illegal instruction) you've used the wrong
CPUTYPE.

Incarnations of this patch survive gcc compiles and my make universe.
I use it on my desktop.

To use it update share/mk, add
	/usr/local/intel/compiler70/ia32/bin	(icc v7, works)
or
	/usr/local/intel_cc_80/bin		(icc v8, doesn't work)
to your PATH, make sure you have a new kernel compile directory
(e.g. MYKERNEL_icc) and run
	CFLAGS="-O2 -ip" CC=icc make depend
	CFLAGS="-O2 -ip" CC=icc make
in it.

Don't compile with -ipo, the build infrastructure uses ld directly to
link the kernel and the modules, but -ipo needs the link step to be
performed with Intel's linker.

Problems with icc v8:
 - panic: npx0 cannot be emulated on an SMP system
 - UP: first start of /bin/sh results in a FP exception

Parts of this commit contains suggestions or submissions from
Marius Strobl <marius@alchemy.franken.de>.

Reviewed by:	silence on -arch
Submitted by:	netchild
2004-03-12 21:36:12 +00:00
David E. O'Brien
4338438bf3 Lower i386's INLINE_LIMIT to AMD64's level. 2004-03-03 09:35:06 +00:00
Peter Wemm
4e37bb8f5d Reduce the inline limit from 20000 to 8000 after the previous changes
to simplify the curthread expansion some months ago.
2004-02-06 20:40:04 +00:00
David E. O'Brien
813dd1729c Add PowerPC CFLAGS.
Submitted by:	gallatin
2003-12-07 09:56:30 +00:00
Peter Wemm
5064105e52 Move the inline limit default variable to a per-arch place. For example,
the amd64 implementation of the pcpu macros is even more verbose than on
i386 and that causes gcc to way overestimate the complexity of this
2-instruction macro.  The other platforms can probably lower their
default values.
2003-11-04 23:29:17 +00:00
Peter Wemm
edd1f930aa Update the kernel compile flags inside the .if ${MACHINE_ARCH} == "amd64"
section to stop gcc generating the dwarf2 .eh_frame unwind tables.  It
is dead weight for the time being.  Maybe it can be used to perform
stack traces and/or get the location of function arguments in ddb, but
that requires a dwarf2 runtime interpreter, which we do not have.

Approved by:	re (amd64 "safe" bits)
2003-05-30 01:06:58 +00:00
Peter Wemm
3c9a3c9ca3 Major pmap rework to take advantage of the larger address space on amd64
systems.  Of note:
- Implement a direct mapped region using 2MB pages.  This eliminates the
  need for temporary mappings when getting ptes.  This supports up to
  512GB of physical memory for now.  This should be enough for a while.
- Implement a 4-tier page table system.  Most of the infrastructure is
  there for 128TB of userland virtual address space, but only 512GB is
  presently enabled due to a mystery bug somewhere.  The design of this
  was heavily inspired by the alpha pmap.c.
- The kernel is moved into the negative address space(!).
- The kernel has 2GB of KVM available.
- Provide a uma memory allocator to use the direct map region to take
  advantage of the 2MB TLBs.
- Fixed some assumptions in the bus_space macros about the ability
  to fit virtual addresses in an 'int'.

Notable missing things:
- pmap_growkernel() should be able to grow to 512GB of KVM by expanding
  downwards below kernbase.  The kernel must be at the top 2GB of the
  negative address space because of gcc code generation strategies.
- need to fix the >512GB user vm code.

Approved by:	re (blanket)
2003-05-23 05:04:54 +00:00
David E. O'Brien
1d7157c5c3 Use C99 for the kernel. 2003-05-03 18:05:56 +00:00
Peter Wemm
a15febf91b Add AMD64 hooks 2003-04-30 22:22:29 +00:00
Jake Burkholder
53faa77b2f Sync with bsd.kern.mk.
Reminded by:	bde
2003-02-28 06:49:59 +00:00
Marcel Moolenaar
8f6a0ee959 ia64 specific CFLAGS change:
Fix the "@gprel relocation against dynamic symbol xxx" linker error.

Variables defined in the link unit and small enough to be put in the
short data section will have a gp-relative access sequence (using the
@gprel relocation). It is invalid to have @gprel relocations in shared
libraries, because they are to be resolved by the static linker and
not the dynamic linker. The -fpic option will cause @ltoff relocations
for @gprel relocations, but the side-effects are untested (if any).
Instead, disable/eliminate the short data section to achieve the same.
2002-10-13 02:52:22 +00:00
Bruce Evans
c6a1c7c5b9 Use the -mno-align-long-strings on i386's to debloat the kernel a little.
This reduces the size of GENERIC's text space by 73999 bytes (about 2%).
The bloat is from approximately 3437 strings longer than 31 characters
being padded to a 32-byte boundary.
2002-10-04 12:54:36 +00:00
Peter Wemm
c253d72f0a Bump the -mev56 to -mev6. Otherwise, when you compile with gcc using
ev6 or pca56 etc this downgrades the cpu specification passed to gas.
As a result, gas will fail when gcc generates media instructions (in
uipc_usrreq.c).  This only affects what gas will accept, not what gcc
generates or what our *.s file contain.
2002-09-06 07:27:41 +00:00
Bruce Evans
64fc62d407 Turned format checking back on. It was left turned off for too long after
the gcc lossage that caused it to be turned off was fixed.

Tested with:	i386/{GENERIC,LINT,...}, alpha/GENERIC
2002-08-25 08:05:02 +00:00
Peter Wemm
e09d00a880 For now, make the .ifdef GCC3 case default. We should change -Wno-format
back to -fformat-extensions (or whatever) when we have the functionality.
We are gaining warnings again that should be fixed but the are being hidden
by NO_WERROR and all the -Wformat noise.
2002-05-24 01:02:45 +00:00
David E. O'Brien
856f29cf94 Use -ffreestanding for kernel bits unconditionally. 2002-05-04 20:07:33 +00:00
Peter Wemm
ea8f3ee347 This will have to be revised, but allow putting 'makeoptions GCC3=true'
in a kernel config file.  This should minimize the tearing-out-hair process
while updating the kernel for gcc-3 compliance.
2001-09-10 06:23:33 +00:00
Assar Westerlund
51bb585207 revert previous accidental commit 2001-07-22 00:12:23 +00:00
Assar Westerlund
57762323e5 get rid of some printf and pointer type warnings 2001-07-22 00:12:22 +00:00
Doug Rabson
0d409bfdac Add section for building ia64 kernels. 2000-10-16 20:04:52 +00:00
Doug Rabson
20b11a6003 Reserve register t7 on alpha to point at per-cpu global variables. 2000-04-28 08:44:42 +00:00
Mike Pritchard
b453864c6a Fix the grammar in my previous commit "lose" -> "loss".
I should have done it that way in the first place.

Pointed-out-by:  bde
2000-04-24 08:50:15 +00:00
Mike Pritchard
a9914af5ff Fix a typo in the comments.
Submitted by:	Allen Campbell <allenc@verinet.com>
2000-04-23 16:32:21 +00:00
David E. O'Brien
54d477a4f1 Make "-mpreferred-stack-boundary=2" the default on the i386.
This reduces the size of the kernel and modules when compiled with GCC 2.95.
1999-11-17 07:30:35 +00:00
Peter Wemm
7f3dea244c $Id$ -> $FreeBSD$ 1999-08-28 00:22:10 +00:00
Bruce Evans
9a6c0bd6c9 Fixed comment and whitespace lossage in recent commits. The -W flag
is not implied by -Wall as claimed by gcc.1.  Adding it causes a
measly 7193 new warnings for LINT, mostly for "unused parameter" and
"comparison between signed and unsigned".
1999-01-29 10:57:18 +00:00
Matthew Dillon
a91f66d4f6 Cleanup bsd.kern.mk after last commit. 1999-01-29 06:22:19 +00:00
Matthew Dillon
0bcef6efa1 Turn on -Wall and -Wcast-qual 1999-01-27 22:53:58 +00:00
Doug Rabson
65be2aace6 Move some compile flags from the kernel makefile to bsd.kern.mk so that
kernel modules are built with the right flags.

Suggested by: Andrew Gallatin <gallatin@cs.duke.edu>
1998-12-17 22:36:21 +00:00
Archie Cobbs
072fd7d9e7 Add -Wunused to kernel build flags.
Reviewed by:	cvs-committers@freebsd.org
1998-12-14 21:03:27 +00:00
Bruce Evans
405b59bcb5 Turned on -Wformat -fformat-extensions. -fformat-extensions requires a
-current version of gcc.  Without it, -Wformat would complain about all
the nonstandard %[Dbrz] formats in the kernel.
1998-09-09 10:04:58 +00:00
Bruce Evans
89f9e39f19 Added -ansi to CWARNFLAGS so that ANSI errors don't come back. 1998-05-01 18:13:37 +00:00