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331722 |
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29-Mar-2018 |
eadler |
Revert r330897:
This was intended to be a non-functional change. It wasn't. The commit message was thus wrong. In addition it broke arm, and merged crypto related code.
Revert with prejudice.
This revert skips files touched in r316370 since that commit was since MFCed. This revert also skips files that require $FreeBSD$ property changes.
Thank you to those who helped me get out of this mess including but not limited to gonzo, kevans, rgrimes.
Requested by: gjb (re)
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330897 |
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14-Mar-2018 |
eadler |
Partial merge of the SPDX changes
These changes are incomplete but are making it difficult to determine what other changes can/should be merged.
No objections from: pfg
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302408 |
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07-Jul-2016 |
gjb |
Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle. Prune svn:mergeinfo from the new branch, as nothing has been merged here.
Additional commits post-branch will follow.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation |
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286336 |
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05-Aug-2015 |
emaste |
Rationalize BSD license on sys/*/include/in_cksum.h
Remove the advertising clause from the Regents of the University of California's license, per the letter dated July 22, 1999.
Update clause numbering.
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235941 |
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24-May-2012 |
bz |
MFp4 bz_ipv6_fast:
in_cksum.h required ip.h to be included for struct ip. To be able to use some general checksum functions like in_addword() in a non-IPv4 context, limit the (also exported to user space) IPv4 specific functions to the times, when the ip.h header is present and IPVERSION is defined (to 4).
We should consider more general checksum (updating) functions to also allow easier incremental checksum updates in the L3/4 stack and firewalls, as well as ponder further requirements by certain NIC drivers needing slightly different pseudo values in offloading cases. Thinking in terms of a better "library".
Sponsored by: The FreeBSD Foundation Sponsored by: iXsystems
Reviewed by: gnn (as part of the whole) MFC After: 3 days
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194111 |
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13-Jun-2009 |
ed |
Clobber "cc" instead of using volatile; remove obsolete register keyword.
Submitted by: Christoph Mallon
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172835 |
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20-Oct-2007 |
bz |
Fold multiple asm statements into one so that the compiler at a certain optimization level (-march=pentium-mmx for example) does not insert intermediate ops which would trash the carry.
Change both sys/i386/i386/in_cksum.c[1] and sys/i386/include/in_cksum.h.
To my best understanding the same problem was addressed in rev. 1.16 of src/sys/i386/include/in_cksum.h for just a single function 3y ago.
Reviewed by: jhb Submitted by: Zhouyi ZHOU <zhouzhouyi FreeBSD.org> (intial version of [1]) MFC after: 5 days PR: 115678, 69257
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143063 |
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02-Mar-2005 |
joerg |
netchild's mega-patch to isolate compiler dependencies into a central place.
This moves the dependency on GCC's and other compiler's features into the central sys/cdefs.h file, while the individual source files can then refer to #ifdef __COMPILER_FEATURE_FOO where they by now used to refer to #if __GNUC__ > 3.1415 && __BARC__ <= 42.
By now, GCC and ICC (the Intel compiler) have been actively tested on IA32 platforms by netchild. Extension to other compilers is supposed to be possible, of course.
Submitted by: netchild Reviewed by: various developers on arch@, some time ago
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134300 |
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25-Aug-2004 |
obrien |
Fix a bug in in_cksum_hdr w/o -O.
The C code assumes that the carry bit is always kept from the previous operation. However, the pointer indexing requires another add operation. Thus, the carry bit from the first operation is tromped over by the "addl" operation that ends up following it, so the "adcl" that follows that has no effect because the carry bit is cleared before it. The result is checksum failure on received packets.
The larger issue is that there isn't any other way of preventing the compiler inserting arbitrary instructions between different __asm statements (and that the commit message in revision 1.13 of in_cksum.h is wrong on this point). From http://developer.apple.com/documentation/DeveloperTools/gcc-3.3/gcc/Extended-Asm.html ---8<---8<---8<--- You can't expect a sequence of volatile asm instructions to remain perfectly consecutive. If you want consecutive output, use a single asm. Also, GCC will perform some optimizations across a volatile asm instruction; GCC does not "forget everything" when it encounters a volatile asm instruction the way some other compilers do. ---8<---8<---8<---
Also, this change also makes the ASM code much easier to read.
PR: 69257 Submitted by: Mike Bristow <mike@urgle.com>, Qing Li <qing.li@bluecoat.com>
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128019 |
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07-Apr-2004 |
imp |
Remove advertising clause from University of California Regent's license, per letter dated July 22, 1999 and email from Peter Wemm, Alan Cox and Robert Watson.
Approved by: core, peter, alc, rwatson
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126891 |
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12-Mar-2004 |
trhodes |
These are changes to allow to use the Intel C/C++ compiler (lang/icc) to build the kernel. It doesn't affect the operation if gcc.
Most of the changes are just adding __INTEL_COMPILER to #ifdef's, as icc v8 may define __GNUC__ some parts may look strange but are necessary.
Additional changes: - in_cksum.[ch]: * use a generic C version instead of the assembly version in the !gcc case (ASM code breaks with the optimizations icc does) -> no bad checksums with an icc compiled kernel Help from: andre, grehan, das Stolen from: alpha version via ppc version The entire checksum code should IMHO be replaced with the DragonFly version (because it isn't guaranteed future revisions of gcc will include similar optimizations) as in: ---snip--- Revision Changes Path 1.12 +1 -0 src/sys/conf/files.i386 1.4 +142 -558 src/sys/i386/i386/in_cksum.c 1.5 +33 -69 src/sys/i386/include/in_cksum.h 1.5 +2 -0 src/sys/netinet/igmp.c 1.6 +0 -1 src/sys/netinet/in.h 1.6 +2 -0 src/sys/netinet/ip_icmp.c
1.4 +3 -4 src/contrib/ipfilter/ip_compat.h 1.3 +1 -2 src/sbin/natd/icmp.c 1.4 +0 -1 src/sbin/natd/natd.c 1.48 +1 -0 src/sys/conf/files 1.2 +0 -1 src/sys/conf/files.amd64 1.13 +0 -1 src/sys/conf/files.i386 1.5 +0 -1 src/sys/conf/files.pc98 1.7 +1 -1 src/sys/contrib/ipfilter/netinet/fil.c 1.10 +2 -3 src/sys/contrib/ipfilter/netinet/ip_compat.h 1.10 +1 -1 src/sys/contrib/ipfilter/netinet/ip_fil.c 1.7 +1 -1 src/sys/dev/netif/txp/if_txp.c 1.7 +1 -1 src/sys/net/ip_mroute/ip_mroute.c 1.7 +1 -2 src/sys/net/ipfw/ip_fw2.c 1.6 +1 -2 src/sys/netinet/igmp.c 1.4 +158 -116 src/sys/netinet/in_cksum.c 1.6 +1 -1 src/sys/netinet/ip_gre.c 1.7 +1 -2 src/sys/netinet/ip_icmp.c 1.10 +1 -1 src/sys/netinet/ip_input.c 1.10 +1 -2 src/sys/netinet/ip_output.c 1.13 +1 -2 src/sys/netinet/tcp_input.c 1.9 +1 -2 src/sys/netinet/tcp_output.c 1.10 +1 -1 src/sys/netinet/tcp_subr.c 1.10 +1 -1 src/sys/netinet/tcp_syncache.c 1.9 +1 -2 src/sys/netinet/udp_usrreq.c
1.5 +1 -2 src/sys/netinet6/ipsec.c 1.5 +1 -2 src/sys/netproto/ipsec/ipsec.c 1.5 +1 -1 src/sys/netproto/ipsec/ipsec_input.c 1.4 +1 -2 src/sys/netproto/ipsec/ipsec_output.c
and finally remove sys/i386/i386 in_cksum.c sys/i386/include in_cksum.h ---snip--- - endian.h: * DTRT in C++ mode - quad.h: * we don't use gcc v1 anymore, remove support for it Suggested by: bde (long ago) - assym.h: * avoid zero-length arrays (remove dependency on a gcc specific feature) This change changes the contents of the object file, but as it's only used to generate some values for a header, and the generator knows how to handle this, there's no impact in the gcc case. Explained by: bde Submitted by: Marius Strobl <marius@alchemy.franken.de> - aicasm.c: * minor change to teach it about the way icc spells "-nostdinc" Not approved by: gibbs (no reply to my mail) - bump __FreeBSD_version (lang/icc needs to know about the changes)
Incarnations of this patch survive gcc compiles since a loooong time, I use it on my desktop. An icc compiled kernel works since Nov. 2003 (exceptions: snd_* if used as modules), it survives a build of the entire ports collection with icc.
Parts of this commit contains suggestions or submissions from Marius Strobl <marius@alchemy.franken.de>.
Reviewed by: -arch Submitted by: netchild
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98648 |
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22-Jun-2002 |
jdp |
Fix several bugs in the i386 asm statements used to speed up Internet checksumming. These bugs could possibly cause bad code to be generated at elevated optimization levels.
First, eliminate the use of preprocessor magic to form the address fields of asm instructions. It hid the actual addresses being referenced from the compiler. Without knowledge of all the data dependencies, the compiler might possibly use optimizations which would result in incorrect code.
Use "__asm __volatile" rather than "__asm" for instruction sequences that pass information through the condition codes (the carry bit, in this case). Without __volatile, the compiler might add unrelated code between consecutive __asm instructions, modifying the condition codes. I have seen GCC insert stack pointer adjustments in this way, for example. Unfortunately, GCC doesn't provide a way to specify dependencies on the condition codes. You can specify that they are clobbered, but not that you are going to use them as input.
Finally, simplify the LOAD macro. This macro is used as a poor man's prefetch. The simpler version gives the compiler more leeway about just how it performs the prefetch.
MFC after: 1 week
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92761 |
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20-Mar-2002 |
alfred |
Remove __P.
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88118 |
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18-Dec-2001 |
jhb |
Various assembly fixes mostly in the form of using the "+" modifier for output operands to mark them as both input and output rather than listing operands twice.
Reviewed by: bde
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69133 |
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25-Nov-2000 |
alfred |
These files are mpsafe.
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60104 |
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06-May-2000 |
jlemon |
Make in_cksum() a macro call to in_cksum_skip(), since it provides the same functionality. Sharing code should help cache issues.
Remove in_cksum_partial, since its not being used, and we now have a way to compute partial checksums on mbuf chains.
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58698 |
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27-Mar-2000 |
jlemon |
Add support for offloading IP/TCP/UDP checksums to NIC hardware which supports them.
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55205 |
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29-Dec-1999 |
peter |
Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL" is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
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50477 |
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27-Aug-1999 |
peter |
$Id$ -> $FreeBSD$
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28270 |
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16-Aug-1997 |
wollman |
Fix all areas of the system (or at least all those in LINT) to avoid storing socket addresses in mbufs. (Socket buffers are the one exception.) A number of kernel APIs needed to get fixed in order to make this happen. Also, fix three protocol families which kept PCBs in mbufs to not malloc them instead. Delete some old compatibility cruft while we're at it, and add some new routines in the in_cksum family.
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22975 |
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22-Feb-1997 |
peter |
Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not ready for it yet.
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21673 |
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14-Jan-1997 |
jkh |
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.
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15884 |
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23-May-1996 |
wollman |
Add an incremental checksum update routine. Perhaps some i386 assembly guru out there can find a way to take advantage of little-endianness to make this computation more efficient. (I am certain that it can be done, but haven't managed to make it work myself.)
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15291 |
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18-Apr-1996 |
wollman |
Add an inline function to compute the common-case IP header checksum.
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