From 47ab3d4a42e9ab51c465c4322d2ec233f6324e6b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 15:16:40 +0200 Subject: Adding upstream version 1.18.10. Signed-off-by: Daniel Baumann --- src/runtime/cgo/gcc_netbsd_arm.c | 79 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 src/runtime/cgo/gcc_netbsd_arm.c (limited to 'src/runtime/cgo/gcc_netbsd_arm.c') diff --git a/src/runtime/cgo/gcc_netbsd_arm.c b/src/runtime/cgo/gcc_netbsd_arm.c new file mode 100644 index 0000000..b0c80ea --- /dev/null +++ b/src/runtime/cgo/gcc_netbsd_arm.c @@ -0,0 +1,79 @@ +// Copyright 2013 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 +#include +#include +#include +#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 crosscall_arm1(void (*fn)(void), void (*setg_gcc)(void*), void *g); +static void* +threadentry(void *v) +{ + ThreadStart ts; + stack_t ss; + + ts = *(ThreadStart*)v; + free(v); + + // On NetBSD, a new thread inherits the signal stack of the + // creating thread. That confuses minit, so we remove that + // signal stack here before calling the regular mstart. It's + // a bit baroque to remove a signal stack here only to add one + // in minit, but it's a simple change that keeps NetBSD + // working like other OS's. At this point all signals are + // blocked, so there is no race. + memset(&ss, 0, sizeof ss); + ss.ss_flags = SS_DISABLE; + sigaltstack(&ss, nil); + + crosscall_arm1(ts.fn, setg_gcc, (void*)ts.g); + return nil; +} -- cgit v1.2.3