all: add 1.21_freebsd

1.21_freebsd/runtime/cgo/gcc_freebsd_amd64.c.patch

@@ -0,0 +1,60 @@
+//--from
+#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"
+//--to
+#include <sys/types.h>
+#include <errno.h>
+#include <pthread.h>
+#include <string.h>
+#include "libcgo.h"
+#include "libcgo_unix.h"
+//--from
+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) {
+		fatalf("pthread_create failed: %s", strerror(err));
+	}
+}
+//--to
+void
+_cgo_sys_thread_start(ThreadStart *ts)
+{
+	pthread_attr_t attr;
+	pthread_t p;
+	size_t size;
+	int err;
+
+	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);
+
+	if (err != 0) {
+		fatalf("pthread_create failed: %s", strerror(err));
+	}
+}

1.21_freebsd/runtime/cgo/gcc_freebsd_sigaction.c.patch

@@ -0,0 +1,4 @@
+//--from
+//go:build freebsd && amd64
+//--to
+//go:build ignore

1.21_freebsd/runtime/cgo/gcc_mmap.c.patch

@@ -0,0 +1,4 @@
+//--from
+//go:build (linux && (amd64 || arm64 || ppc64le)) || (freebsd && amd64)
+//--to
+//go:build (linux && (amd64 || arm64 || ppc64le))

1.21_freebsd/runtime/cgo/gcc_setenv.c.patch

@@ -0,0 +1,26 @@
+//--from
+void
+x_cgo_setenv(char **arg)
+{
+	_cgo_tsan_acquire();
+	setenv(arg[0], arg[1], 1);
+	_cgo_tsan_release();
+}
+//--to
+void
+x_cgo_setenv(char **arg)
+{
+}
+//--from
+void
+x_cgo_unsetenv(char **arg)
+{
+	_cgo_tsan_acquire();
+	unsetenv(arg[0]);
+	_cgo_tsan_release();
+}
+//--to
+void
+x_cgo_unsetenv(char **arg)
+{
+}

1.21_freebsd/runtime/cgo/mmap.go.patch

@@ -0,0 +1,4 @@
+//--from
+//go:build (linux && amd64) || (linux && arm64) || (freebsd && amd64)
+//--to
+//go:build (linux && amd64) || (linux && arm64)

1.21_freebsd/runtime/cgo/sigaction.go.patch

@@ -0,0 +1,4 @@
+//--from
+//go:build (linux && amd64) || (freebsd && amd64) || (linux && arm64) || (linux && ppc64le)
+//--to
+//go:build (linux && amd64) || (linux && arm64) || (linux && ppc64le)

1.21_freebsd/runtime/os_freebsd.go.patch

@@ -0,0 +1,15 @@
+//--from
+func sysSigaction(sig uint32, new, old *sigactiont) {
+//--to
+func sysSigaction(sig uint32, new, old *sigactiont) {
+	return
+//--from
+func getncpu() int32 {
+//--to
+func getncpu() int32 {
+	return 13 // TODO: Add a C file.
+//--from
+func getPageSize() uintptr {
+//--to
+func getPageSize() uintptr {
+	return 16384 // TODO: Enable to change by an argument.

1.21_freebsd/runtime/runtime1.go.patch

@@ -0,0 +1,5 @@
+//--append
+// Expose the entry point for some special environments.
+
+//go:cgo_export_static _rt0_amd64_freebsd_lib
+//go:cgo_export_dynamic _rt0_amd64_freebsd_lib