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1dd4da1459
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Elias Naur 1dd4da1459 liblink, cmd/5a, cmd/5l: restore cgo on older ARM processors 
CL 56120043 fixed TLS handling on ARM after the introduction of
liblink but left older ARM processors broken.

Before liblink, the MRC instruction was replaced with a fallback
on older ARMs. CL 56120043 removed that, because the rewrite matched
bit patterns on the AWORD pseudo-instruction and could therefore change
unrelated AWORDs that happened to match.

This CL adds an AMRC instruction to encode both MRC and MCR previously
encoded as AWORDs. Then, in liblink, the AMRC instructions are either
rewritten to AWORD, or, on goarm < 7, replaced with a branch to the
fallback.

./all.bash completes successfully on an ARMv7 with either GOARM=7 or
GOARM=5. I have verified that the fallback is indeed present in both
runtime.save_gm and runtime.load_gm when GOARM=5 but not when GOARM=7.

If all goes well, this should fix the armv5 builders.

LGTM=iant
R=iant, rsc
CC=golang-codereviews
https://golang.org/cl/55540044
2014-02-03 14:07:54 -08:00
api api: update next.txt 2014-01-22 10:54:51 -08:00
doc effective_go: move 'Type switch' section into 'Control structures' section. 2014-01-23 16:26:42 -08:00
include liblink: include missing pragmas for plan9 formatter 2014-01-22 06:23:19 +01:00
lib lib/codereview: add LGTM= line to commit messages 2014-01-23 15:10:38 -05:00
misc cmd/ld: fix bug with "runtime/cgo" in external link mode 2014-01-30 09:25:47 -08:00
src liblink, cmd/5a, cmd/5l: restore cgo on older ARM processors 2014-02-03 14:07:54 -08:00
test cmd/gc: do not consider length zero arrays as comparable. 2014-01-31 00:30:56 +01:00
.hgignore .hgignore: remove duplicate entry 2013-12-12 19:01:50 -08:00
.hgtags tag go1.2 2013-12-02 09:06:41 +11:00
AUTHORS A+C: Gordon Klaus (individual CLA) 2014-02-03 11:05:51 -08:00
CONTRIBUTORS A+C: Gordon Klaus (individual CLA) 2014-02-03 11:05:51 -08:00
favicon.ico godoc: update favicon 2012-10-11 17:02:36 +11:00
LICENSE doc: update licensing text one more time 2012-03-27 15:09:13 +11:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README README: Fix installation instructions 2013-11-20 13:47:37 -08:00
robots.txt godoc: serve robots.txt raw 2011-02-19 05:46:20 +11:00

README 

This is the source code repository for the Go programming language.  

For documentation about how to install and use Go,
visit http://golang.org/ or load doc/install-source.html
in your web browser.

After installing Go, you can view a nicely formatted
doc/install-source.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install/source.

Unless otherwise noted, the Go source files are distributed
under the BSD-style license found in the LICENSE file.

--

Binary Distribution Notes

If you have just untarred a binary Go distribution, you need to set
the environment variable $GOROOT to the full path of the go
directory (the one containing this README).  You can omit the
variable if you unpack it into /usr/local/go, or if you rebuild
from sources by running all.bash (see doc/install.html).
You should also add the Go binary directory $GOROOT/bin
to your shell's path.

For example, if you extracted the tar file into $HOME/go, you might
put the following in your .profile:

    export GOROOT=$HOME/go
    export PATH=$PATH:$GOROOT/bin

See doc/install.html for more details.