Commit Graph

45 Commits

Author SHA1 Message Date
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
Bruce Evans
7ffe3d1c5d Oops, comment lines can't be indented either. 1997-10-21 10:39:27 +00:00
Bruce Evans
1bfc282680 Oops, comment lines can't be continued. 1997-10-21 10:36:07 +00:00
Bruce Evans
6e47de28bb Added -Wuninitialized to CWARNFLAGS. Warnings about uninitialialized
variables were lost when we removed -W, and 23 new ones including at
least one serious one have crept in for LINT.

Restored -Winline to CFLAGS.  This gives only 3 old warnings and 1 new
for LINT.
1997-10-21 06:53:24 +00:00
Peter Wemm
b97fa2ef50 Revert $FreeBSD$ to $Id$ 1997-02-22 14:13:04 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Bruce Evans
a400403a8c Turned off -W and -Winline so that the warnings that should be fixed for
2.2 are more obvious.  -Winline is unimportant, but -W gives thousands
of warnings for comparisions.  Turning off -W also loses warnings for:
- auto variables clobbered by longjmp.  Not much of a problem in the kernel.
- functions returning without a value.  I don't like losing this.
- an expression statement or the left side of a comma operand contains no
  side effects.  Turning this off also stops warnings for the low quality
  debugging macros in gsc.c and lpt.c.

Should be in 2.2.
1996-11-11 15:49:27 +00:00
Bruce Evans
272937b07f Oops, this wasn't supposed to have -Wcast-qual yet.
Also disabled -Wunused.  It caused too many warnings even for me.
The sign mismatch warnings should be fixed first.  They are more
important and harder to disable (they are controlled by -W, which
controls too many things).
1996-10-09 18:41:40 +00:00
Bruce Evans
6b30bfd370 Oops, forgot to cvs add bsd.kern.mk.
Centralized the definition of CWARNFLAGS into bsd.kern.mk.
1996-10-08 22:10:49 +00:00