This is an automated email from the ASF dual-hosted git repository.
jerzy pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/mynewt-core.git
commit 532a5af5721273a905dd4eee73ca54af7a2a4df0
Author: Jerzy Kasenberg <jerzy.kasenb...@codecoup.pl>
AuthorDate: Wed May 31 13:12:48 2023 +0200
libc: Add newlib-nano support
If default baselibc does not provide functionality application needs
it is possible now to set syscfg LIBC to nano to disable
baselibc and enabled gcc provided newlib-nano
Signed-off-by: Jerzy Kasenberg <jerzy.kasenb...@codecoup.pl>
---
libc/nano/pkg.yml | 31 +++++++++++++++++++
libc/nano/src/start.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++
libc/nano/src/syscalls.c | 69 +++++++++++++++++++++++++++++++++++++++++
libc/pkg.yml | 29 ++++++++++++++++++
libc/syscfg.yml | 27 ++++++++++++++++
5 files changed, 236 insertions(+)
diff --git a/libc/nano/pkg.yml b/libc/nano/pkg.yml
new file mode 100644
index 000000000..e9391eacd
--- /dev/null
+++ b/libc/nano/pkg.yml
@@ -0,0 +1,31 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+pkg.name: libc/nano
+pkg.description: Newlib nano for embedded mynewt.
+pkg.keywords:
+ - libc
+
+pkg.deps:
+
+pkg.lflags:
+ - -specs=nano.specs
+ - -u_close
+ - -u_sbrk
+
diff --git a/libc/nano/src/start.c b/libc/nano/src/start.c
new file mode 100644
index 000000000..4aaaf997e
--- /dev/null
+++ b/libc/nano/src/start.c
@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include <stdlib.h>
+#include "os/mynewt.h"
+
+extern int main(int argc, char **argv);
+void __libc_init_array(void);
+
+/*
+ * Rudimentary startup function.
+ */
+void _start(void)
+{
+ /*
+ * Run global objects constructors.
+ * Call to this function is ofter found in startup files.
+ * mynewt did not use this pattern hence we have single place
+ * for all MCU just here
+ */
+ __libc_init_array();
+
+#if !MYNEWT_VAL(OS_SCHEDULING)
+ int rc;
+
+ rc = main(0, NULL);
+ exit(rc);
+#else
+ os_init(main);
+ os_start();
+#endif
+}
+
+__attribute__((weak)) void
+_init(void)
+{
+}
+
+__attribute__((weak)) void
+_fini(void)
+{
+}
+
+extern void (*__preinit_array_start[])(void);
+extern void (*__preinit_array_end[])(void);
+extern void (*__init_array_start[])(void);
+extern void (*__init_array_end[])(void);
+
+void
+__libc_init_array(void)
+{
+ size_t count;
+ size_t i;
+
+ count = __preinit_array_end - __preinit_array_start;
+ for (i = 0; i < count; i++)
+ __preinit_array_start[i]();
+
+ _init();
+
+ count = __init_array_end - __init_array_start;
+ for (i = 0; i < count; i++)
+ __init_array_start[i]();
+}
diff --git a/libc/nano/src/syscalls.c b/libc/nano/src/syscalls.c
new file mode 100644
index 000000000..644cf0672
--- /dev/null
+++ b/libc/nano/src/syscalls.c
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include <sys/stat.h>
+#include <syscfg/syscfg.h>
+
+#include <console/console.h>
+
+int
+_write(int fd, char *ptr, int len)
+{
+ (void)fd, (void)ptr;
+
+ if (fd == 1 || fd == 2) {
+ console_write(ptr, len);
+ }
+ return len;
+}
+
+int
+_close(int fd)
+{
+ (void)fd;
+ return 0;
+}
+
+int
+_fstat(int fd, struct stat *st)
+{
+ (void)fd, (void)st;
+ return 0;
+}
+
+int
+_isatty(int fd)
+{
+ (void)fd;
+ return 0;
+}
+
+int
+_read(int fd, char *ptr, int len)
+{
+ (void)fd, (void)ptr, (void)len;
+ return 0;
+}
+
+int
+_lseek(int fd, int ptr, int dir)
+{
+ (void)fd, (void)ptr, (void)dir;
+ return 0;
+}
diff --git a/libc/pkg.yml b/libc/pkg.yml
new file mode 100644
index 000000000..ba7caa8ed
--- /dev/null
+++ b/libc/pkg.yml
@@ -0,0 +1,29 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+pkg.name: libc
+pkg.description: Standard C library selector.
+pkg.keywords:
+ - libc
+
+pkg.deps.'LIBC=="baselibc"':
+ - libc/baselibc
+
+pkg.deps.'LIBC=="nano"':
+ - libc/nano
diff --git a/libc/syscfg.yml b/libc/syscfg.yml
new file mode 100644
index 000000000..c4a242b1c
--- /dev/null
+++ b/libc/syscfg.yml
@@ -0,0 +1,27 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+syscfg.defs:
+ LIBC:
+ description: "Chooses c library implementation"
+ value: baselibc
+ choices:
+ - baselibc
+ # nano is provided by gcc
+ - nano
