Fixes #4878.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7420052

R=ken2
CC=golang-dev
https://golang.org/cl/7694043

Let's just see what breaks.

R=golang-dev, bradfitz, adg
CC=golang-dev
https://golang.org/cl/7693043

R=ken2
CC=golang-dev
https://golang.org/cl/7626045

R=ken2, ken
CC=golang-dev
https://golang.org/cl/7483045

Tell Windows users how to update Mercurial's library.zip to add some missing dependencies.

Fixes #4745.

R=golang-dev, patrick.allen.higgins, minux.ma, adg
CC=golang-dev
https://golang.org/cl/7558043

"go build" and "go install" were mixing stdout and stderr
from the toolchain, then putting it all on stdout. With this
change, it stays mixed, and is sent to stderr. Because
the toolchain does not create output in a clean compile/install,
sending all output to stderr makese more sense.

Also fix test.bash because of "mktemp: too few X's
in template `testgo'" on Linux.

Fixes #4917.

R=golang-dev, rsc, adg
CC=golang-dev
https://golang.org/cl/7393073

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/7690043

Dynimpname was getting too confusing.
Replace flag-like checks with tests of s->type.

R=ken2
CC=golang-dev
https://golang.org/cl/7594046

Also move symbol names onto lines by themselves: some are very long.
Show relocations.

R=ken2
CC=golang-dev
https://golang.org/cl/7689043

This makes binaries work with OS X nm.

R=ken2
CC=golang-dev
https://golang.org/cl/7558044

I guess it would be too much to ask for gcc on my machine to give
the same errors as gcc on the builder machines.

R=ken2
CC=golang-dev
https://golang.org/cl/7686044

This brings Mach-O generation more in line with ELF generation.

Having separate sections for the symtab and pclntab mean that we
can find them that way, instead of using the deprecated debug segments.
(And the host linker will keep separate sections for us, but probably
not the debug segments.)

R=ken2
CC=golang-dev
https://golang.org/cl/7688043

R=ken2
CC=golang-dev
https://golang.org/cl/7497044

Fixes #4869.
Fixes #5007.
Update #5005.

R=golang-dev, 0xe2.0x9a.0x9b, bradfitz
CC=golang-dev
https://golang.org/cl/7534044

Previously it was evaluated once, so re-using the timeout option
repeatedly would always generate the same deadine.

Also switch to doing just one pass over the options, making
the private interface actually useful.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/7608045

myrtle$ go version
go version devel +d533352b414d Sat Mar 09 05:39:15 2013 +0100 netbsd/386
myrtle$ time go test -ldflags -hostobj ../misc/cgo/test
ok      _/var/project/GoLang/misc/cgo/test      10.962s
   68.63s real    49.60s user    19.06s system
myrtle$ uname -a
NetBSD myrtle.plan9.local 6.0_BETA2 NetBSD 6.0_BETA2 (GENERIC) i386

R=rsc
CC=golang-dev
https://golang.org/cl/7641047

Tested on FreeBSD 9.1 amd64, per rsc's instructions at
https://groups.google.com/d/topic/golang-dev/HjRTLvRsJXo/discussion .

R=golang-dev, lucio.dere, devon.odell, rsc
CC=golang-dev
https://golang.org/cl/7664044

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/7608044

Update #4929

Regenerated from FreeBSD-9.1 for amd64 and 386, FreeBSD-CURRENT for arm.

R=devon.odell, minux.ma, rsc
CC=golang-dev
https://golang.org/cl/7438053

R=golang-dev, andybalholm, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/7485045

The call to the C function runtime.findnull() requires
that we provide the argument at 0(SP).

R=rsc, rminnich, ality
CC=golang-dev
https://golang.org/cl/7559047

The sticking point on 386 has been the "PC relative" relocations
used to point the garbage collection metadata at the type info.
These aren't in the code segment, and I don't trust that the linker
isn't doing something special that would be okay in code but
not when interpreting the pointers as data (for example, a PLT
jump table would be terrible).

Solve the problem in two steps:

1. Handle "PC relative" relocations within a section internally,
so that the external linker never sees them.

2. Move the gcdata and gcbss tables into the rodata section,
where the type information lives, so that the relocations can
be handled internally.

(To answer the obvious question, we make the gc->type
references relative so that they need not be relocated
individually when generating a shared object file.)

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7629043

For  better printing, I recently changed Name to return "<unnamed>" for templates
with empty names, but this causes trouble for the many packages that used "" as
the template name, so restore the old behavior.
It's usually printed as a quoted string anyway, so it should be fine.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/7577044

Fixes #4981.

R=bradfitz, fullung, rsc, minux.ma
CC=golang-dev
https://golang.org/cl/7474047

The information was missing, oddly enough.

R=golang-dev, rsc, iant
CC=golang-dev
https://golang.org/cl/7636044

Also rename the relevant examples and make sure the working one compiles.

R=golang-dev, bradfitz, adg, iant, rsc
CC=golang-dev
https://golang.org/cl/7597043

Fixes #4902

R=golang-dev, alex.brainman, r, google
CC=golang-dev
https://golang.org/cl/7579045

Otherwise the next goroutine run on the m
can get inadvertently locked if it executes a cgo call
that turns on the internal lock.

While we're here, fix the cgo panic unwind to
decrement m->ncgo like the non-panic unwind does.

Fixes #4971.

R=golang-dev, iant, dvyukov
CC=golang-dev
https://golang.org/cl/7627043

Have seen failures with GOMAXPROCS=4 on Windows.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7626043

Before this CL, running

        cd misc/cgo/test
        go test -c
        readelf --dyn-syms test.test | grep cgoexp

turned up many UNDEF symbols corresponding to symbols actually
in the binary but marked only cgo_export_static. Only symbols
marked cgo_export_dynamic should be listed in this mode.
And if the symbol is going to be listed, it should be listed with its
actual address instead of UNDEF.

The Linux dynamic linker didn't care about the seemingly missing
symbols, but the BSD one did.

This CL eliminates the symbols from the dyn-syms table.

R=golang-dev
TBR=golang-dev
CC=golang-dev
https://golang.org/cl/7624043

Fixes #4905.

R=rsc, r, iant, ken
CC=golang-dev
https://golang.org/cl/7583043

- Introduce MaxAlign constant and use in data layout
and ELF section header.

- Allow up to 16-byte alignment for large objects
(will help Keith's hash changes).

- Emit ELF symbol for .rathole (global /dev/null used by 8c).

- Invoke gcc with -m32/-m64 as appropriate.

- Don't invoke gcc if writing the .o file failed.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7563045

Now the default startup is that the program begins at _rt0_386_$GOOS,
which behaves as if calling main(argc, argv). Main jumps to _rt0_386.

This makes the _rt0_386 entry match the expected semantics for
the standard C "main" function, which we can now provide for use when
linking against a standard C library.

386 analogue of https://golang.org/cl/7525043

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7551045

Implement what Chrome calls socket "late binding". See:
https://insouciant.org/tech/connection-management-in-chromium/

In a nutshell, if our HTTP client needs a TCP connection to a
remote host and there's not an idle one available, rather than
kick off a dial and wait for that specific dial, we instead
kick off a dial and wait for either our own dial to finish, or
any other TCP connection to that same host to become
available.

The implementation looks like a classic "Learning Go
Concurrency" slide.

Chrome's commit and numbers:
http://src.chromium.org/viewvc/chrome?view=rev&revision=36230

R=golang-dev, daniel.morsing, adg
CC=golang-dev
https://golang.org/cl/7587043

Change 231af8ac63aa (CL 7314062) made runtime.enteryscall()
set m->mcache = nil, which means that we can no longer use
syscall.errstr in syscall.Syscall and syscall.Syscall6, since it
requires a new buffer to be allocated for holding the error string.
Instead, we use pre-allocated per-M storage to hold error strings
from syscalls made while in entersyscall mode, and call
runtime.findnull to calculate the lengths.

Fixes #4994.

R=rsc, rminnich, ality, dvyukov, rminnich, r
CC=golang-dev
https://golang.org/cl/7567043

This CL splits multicast listener tests into two; for IPv4 and
for IPv6. It also removes redundant test inputs and makes sure
that assignment of multicast interface to stablize the tests.

Fixes #4059.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7565043

Instructions for use in AES hashing.  See CL#7543043

R=rsc
CC=golang-dev
https://golang.org/cl/7548043

The code would violate the contract of cmp64.

Fixes #5002.

R=rsc, golang-dev
CC=golang-dev
https://golang.org/cl/7593043

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7595043