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LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/175480043
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uint16 occupies 2 bytes, not 1
LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/178100043
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TBR=austin
CC=golang-codereviews
https://codereview.appspot.com/179040044
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LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/177090043
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struct siginfo_t's si_addr field is part of a union.
Previously, we represented this union in Go using an opaque
byte array and accessed the si_addr field using unsafe (and
wrong on 386 and arm!) pointer arithmetic. Since si_addr is
the only field we use from this union, this replaces the
opaque byte array with an explicit declaration of the si_addr
field and accesses it directly.
LGTM=minux, rsc
R=rsc, minux
CC=golang-codereviews
https://codereview.appspot.com/179970044
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Previously, this used the top 8 bits of an instruction as a
sort-of opcode and ignored the top two bits of the relative
PC. This worked because these jumps are always negative and
never big enough for the top two bits of the relative PC (also
the bottom 2 bits of the sort-of opcode) to be anything other
than 0b11, but the code is confusing because it doesn't match
the actual structure of the instruction.
Instead, use the real 6 bit opcode and use all 24 bits of
relative PC.
LGTM=rsc
R=rsc, dave
CC=golang-codereviews
https://codereview.appspot.com/179960043
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Previously, lfstack assumed Linux limited user space addresses
to 43 bits on Power64 based on a paper from 2001. It turns
out the limit is now 46 bits, so lfstack was truncating
pointers.
Raise the limit to 48 bits (for some future proofing and to
make it match amd64) and add a self-test that will fail in a
useful way if ever unpack(pack(x)) != x.
With this change, dev.cc passes all.bash on power64le.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/174430043
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conversion
LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/176970043
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This is the power64 component of CL 174950043.
With this, dev.cc compiles on power64 and power64le and passes
most tests if GOGC=off (but crashes in go_bootstrap if GC is
on).
LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/175290043
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Fix a constant conversion error. Add set_{sec,nsec} for
timespec and set_usec for timeval. Fix type of
sigaltstackt.ss_size.
LGTM=rsc
R=rsc, bradfitz
CC=golang-codereviews
https://codereview.appspot.com/180840043
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The power64 equivalent of CL 174860043
LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/179890043
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The power64 equivalent of CL 168510043
LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/178940043
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The power64 equivalent of CL 168500044
LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/175280043
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Eventually I'd like almost everything cmd/dist generates
to be done with 'go generate' and checked in, to simplify
the bootstrap process. The only thing cmd/dist really needs
to do is write things like the current experiment info and
the current version.
This is a first step toward that. It replaces the _NaCl etc
constants with generated ones goos_nacl, goos_darwin,
goarch_386, and so on.
LGTM=dave, austin
R=austin, dave, bradfitz
CC=golang-codereviews, iant, r
https://codereview.appspot.com/174290043
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LGTM=austin
R=austin
CC=golang-codereviews
https://codereview.appspot.com/176990043
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LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/177940043
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LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/169710043
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* _sfloat dispatches to runtime._sfloat2 with the Go calling convention, so the seecond argument is a [15]uint32, not a *[15]uint32.
* adjust _sfloat2 to return the new pc in 68(R13) as expected.
LGTM=rsc
R=minux, austin, rsc
CC=golang-codereviews
https://codereview.appspot.com/174160043
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It's rather unsporting of the kernel to give us a pointer to unaligned memory.
This fixes one crash, the next crash occurs in the soft float emulation.
LGTM=minux, rsc, austin
R=minux, rsc, austin
CC=golang-codereviews
https://codereview.appspot.com/177730043
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Fixes build.
Tested that all these systems can make.bash.
TBR=austin
CC=golang-codereviews
https://codereview.appspot.com/177770043
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While we are here, add the linux/power64 version.
LGTM=austin
R=austin
CC=aram, dvyukov, golang-codereviews
https://codereview.appspot.com/177750043
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TBR=austin
CC=golang-codereviews
https://codereview.appspot.com/176760044
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LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://codereview.appspot.com/176750043
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This is to reduce the delta between dev.cc and dev.garbage to just garbage collector changes.
These are the files that had merge conflicts and have been edited by hand:
malloc.go
mem_linux.go
mgc.go
os1_linux.go
proc1.go
panic1.go
runtime1.go
LGTM=austin
R=austin
CC=golang-codereviews
https://codereview.appspot.com/174180043
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LGTM=rsc
R=golang-codereviews, bradfitz, rsc
CC=golang-codereviews
https://codereview.appspot.com/173200044
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This change fixes the Solaris port.
LGTM=dave, rsc
R=rsc, dave
CC=brad, golang-codereviews
https://codereview.appspot.com/168600045
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LGTM=rsc
R=rsc
CC=dvyukov, golang-codereviews
https://codereview.appspot.com/172530043
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LGTM=rsc
R=rsc, bradfitz
CC=golang-codereviews
https://codereview.appspot.com/171660043
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This was originally done to the C port in rev 17d3b45534b5 and
seemingly got lost during the conversion.
LGTM=bradfitz
R=rsc, bradfitz
CC=golang-codereviews
https://codereview.appspot.com/167700043
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Memory management was consolitated with the BSD ports, since
it was almost identical.
Assembly thunks are gone, being replaced by the new //go:linkname
feature.
This change supersedes CL 138390043 (runtime: convert solaris
netpoll to Go), which was previously reviewed and tested.
This change is only the first step, the port now builds,
but doesn't run. Binaries fail to exec:
ld.so.1: 6.out: fatal: 6.out: TLS requirement failure : TLS support is unavailable
Killed
This seems to happen because binaries don't link with libc.so
anymore. We will have to solve that in a different CL.
Also this change is just a rough translation of the original
C code, cleanup will come in a different CL.
[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]
LGTM=rsc
R=rsc, dave
CC=golang-codereviews, iant, khr, minux, r, rlh
https://codereview.appspot.com/174960043
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LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/175000043
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LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/169490043
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LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/174050043
Committer: Russ Cox <rsc@golang.org>
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Scalararg and ptrarg are not "signal safe".
Go code filling them out can be interrupted by a signal,
and then the signal handler runs, and if it also ends up
in Go code that uses scalararg or ptrarg, now the old
values have been smashed.
For the pieces of code that do need to run in a signal handler,
we introduced onM_signalok, which is really just onM
except that the _signalok is meant to convey that the caller
asserts that scalarg and ptrarg will be restored to their old
values after the call (instead of the usual behavior, zeroing them).
Scalararg and ptrarg are also untyped and therefore error-prone.
Go code can always pass a closure instead of using scalararg
and ptrarg; they were only really necessary for C code.
And there's no more C code.
For all these reasons, delete scalararg and ptrarg, converting
the few remaining references to use closures.
Once those are gone, there is no need for a distinction between
onM and onM_signalok, so replace both with a single function
equivalent to the current onM_signalok (that is, it can be called
on any of the curg, g0, and gsignal stacks).
The name onM and the phrase 'm stack' are misnomers,
because on most system an M has two system stacks:
the main thread stack and the signal handling stack.
Correct the misnomer by naming the replacement function systemstack.
Fix a few references to "M stack" in code.
The main motivation for this change is to eliminate scalararg/ptrarg.
Rick and I have already seen them cause problems because
the calling sequence m.ptrarg[0] = p is a heap pointer assignment,
so it gets a write barrier. The write barrier also uses onM, so it has
all the same problems as if it were being invoked by a signal handler.
We worked around this by saving and restoring the old values
and by calling onM_signalok, but there's no point in keeping this nice
home for bugs around any longer.
This CL also changes funcline to return the file name as a result
instead of filling in a passed-in *string. (The *string signature is
left over from when the code was written in and called from C.)
That's arguably an unrelated change, except that once I had done
the ptrarg/scalararg/onM cleanup I started getting false positives
about the *string argument escaping (not allowed in package runtime).
The compiler is wrong, but the easiest fix is to write the code like
Go code instead of like C code. I am a bit worried that the compiler
is wrong because of some use of uninitialized memory in the escape
analysis. If that's the reason, it will go away when we convert the
compiler to Go. (And if not, we'll debug it the next time.)
LGTM=khr
R=r, khr
CC=austin, golang-codereviews, iant, rlh
https://codereview.appspot.com/174950043
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LGTM=bradfitz, r
R=r, bradfitz
CC=golang-codereviews
https://codereview.appspot.com/167650043
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Last try and then someone with a FreeBSD has to do it.
TBR=r
CC=golang-codereviews
https://codereview.appspot.com/171590043
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TBR=r
CC=golang-codereviews
https://codereview.appspot.com/168600043
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Will prod freebsd build along.
Not claiming it will fix it.
TBR=r
CC=golang-codereviews
https://codereview.appspot.com/171580044
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It builds.
Don't know if it works, but it's a lot closer than having everything in C.
LGTM=r
R=r
CC=golang-codereviews
https://codereview.appspot.com/168590043
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Also include onM_signalok fix from issue 8995.
Fixes linux/arm build.
Fixes issue 8995.
LGTM=r
R=r, dave
CC=golang-codereviews
https://codereview.appspot.com/168580043
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This was recorded as an hg mv instead of an hg cp.
For now a C version is needed for the Go compiler.
TBR=r
CC=golang-codereviews
https://codereview.appspot.com/174020043
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The conversion was done with an automated tool and then
modified only as necessary to make it compile and run.
vlrt.c was only called from C. Pure delete.
[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]
LGTM=r
R=r, austin
CC=dvyukov, golang-codereviews, iant, khr
https://codereview.appspot.com/174860043
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The conversion was done with an automated tool and then
modified only as necessary to make it compile and run.
[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]
LGTM=r
R=r
CC=austin, dvyukov, golang-codereviews, iant, khr
https://codereview.appspot.com/174830044
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The conversion was done with an automated tool and then
modified only as necessary to make it compile and run.
[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]
LGTM=r
R=r, daniel.morsing
CC=austin, dvyukov, golang-codereviews, iant, khr
https://codereview.appspot.com/172260043
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The conversion was done with an automated tool and then
modified only as necessary to make it compile and run.
[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]
LGTM=r
R=r
CC=austin, dvyukov, golang-codereviews, iant, khr
https://codereview.appspot.com/172250044
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The conversion was done with an automated tool and then
modified only as necessary to make it compile and run.
[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]
LGTM=r
R=r, austin
CC=dvyukov, golang-codereviews, iant, khr
https://codereview.appspot.com/172250043
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The conversion was done with an automated tool and then
modified only as necessary to make it compile and run.
In a few cases, defs_$GOOS_$GOARCH.go already existed,
so the target here is defs1_$GOOS_$GOARCH.go.
[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]
LGTM=r
R=r
CC=austin, dvyukov, golang-codereviews, iant, khr
https://codereview.appspot.com/171490043
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float.c held bit patterns for special float64 values,
hiding from the real uses. Rewrite Go code not to
refer to those values directly.
Convert library routines in runtime.c and string.c.
LGTM=r
R=r, dave
CC=austin, dvyukov, golang-codereviews, iant, khr
https://codereview.appspot.com/170330043
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The main change is that #include "zasm_GOOS_GOARCH.h"
is now #include "go_asm.h" and/or #include "go_tls.h".
Also, because C StackGuard is now Go _StackGuard,
the assembly name changes from const_StackGuard to
const__StackGuard.
In asm_$GOARCH.s, add new function getg, formerly
implemented in C.
The renamed atomics now have Go wrappers, to get
escape analysis annotations right. Those wrappers
are in CL 174860043.
LGTM=r, aram
R=r, aram
CC=austin, dvyukov, golang-codereviews, iant, khr
https://codereview.appspot.com/168510043
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This code overused macros and could not be
converted automatically. Instead a new sigctxt
type had to be defined for each os/arch combination,
with a common (implicit) interface used by the
arch-specific signal handler code.
[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]
LGTM=r
R=r
CC=austin, dvyukov, golang-codereviews, iant, khr
https://codereview.appspot.com/168500044
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