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cmd/nm, runtime/cgo: add cgo support for freebsd/arm64

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Based on work by Mikaël Urankar (@MikaelUrankar).

Updates #24715
Updates #35197

Change-Id: I91144101043d67d3f8444bf8389c9606abe2a66c
Reviewed-on: https://go-review.googlesource.com/c/go/+/199919
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser 2019-10-04 10:11:29 +02:00 committed by Tobias Klauser
parent 152dddee7e
commit 33e3983db8
3 changed files with 74 additions and 1 deletions
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2
src/cmd/dist/build.go vendored
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@ -1485,7 +1485,7 @@ var cgoEnabled = map[string]bool{
"freebsd/386": true,
"freebsd/amd64": true,
"freebsd/arm": true,
"freebsd/arm64": false,
"freebsd/arm64": true,
"illumos/amd64": true,
"linux/386": true,
"linux/amd64": true,

5
src/cmd/nm/nm_cgo_test.go
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@ -17,6 +17,11 @@ func canInternalLink() bool {
return false
case "dragonfly":
return false
case "freebsd":
switch runtime.GOARCH {
case "arm64":
return false
}
case "linux":
switch runtime.GOARCH {
case "arm64", "mips64", "mips64le", "mips", "mipsle", "ppc64", "ppc64le":

68
src/runtime/cgo/gcc_freebsd_arm64.c Normal file
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@ -0,0 +1,68 @@
// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include <sys/types.h>
#include <errno.h>
#include <sys/signalvar.h>
#include <pthread.h>
#include <signal.h>
#include <string.h>
#include "libcgo.h"
#include "libcgo_unix.h"
static void* threadentry(void*);
static void (*setg_gcc)(void*);
void
x_cgo_init(G *g, void (*setg)(void*))
{
pthread_attr_t attr;
size_t size;
setg_gcc = setg;
pthread_attr_init(&attr);
pthread_attr_getstacksize(&attr, &size);
g->stacklo = (uintptr)&attr - size + 4096;
pthread_attr_destroy(&attr);
}
void
_cgo_sys_thread_start(ThreadStart *ts)
{
pthread_attr_t attr;
sigset_t ign, oset;
pthread_t p;
size_t size;
int err;
SIGFILLSET(ign);
pthread_sigmask(SIG_SETMASK, &ign, &oset);
pthread_attr_init(&attr);
pthread_attr_getstacksize(&attr, &size);
// Leave stacklo=0 and set stackhi=size; mstart will do the rest.
ts->g->stackhi = size;
err = _cgo_try_pthread_create(&p, &attr, threadentry, ts);
pthread_sigmask(SIG_SETMASK, &oset, nil);
if (err != 0) {
fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err));
abort();
}
}
extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
static void*
threadentry(void *v)
{
ThreadStart ts;
ts = *(ThreadStart*)v;
free(v);
crosscall1(ts.fn, setg_gcc, (void*)ts.g);
return nil;
}