examples/fdpicxip, testing/fs/xipfs: FDPIC modules executed in place from XIPFS

examples/fdpicxip/CMakeLists.txt

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+# ##############################################################################
+# apps/examples/fdpicxip/CMakeLists.txt
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# 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.
+#
+# ##############################################################################
+
+if(CONFIG_EXAMPLES_FDPICXIP)
+  nuttx_add_application(NAME fdpicxip SRCS fdpicxip_main.c)
+endif()

examples/fdpicxip/Kconfig

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+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config EXAMPLES_FDPICXIP
+	tristate "FDPIC modules executed in place from xipfs demo"
+	depends on FS_XIPFS && FDPIC && LIBC_EXECFUNCS
+	default n
+	---help---
+		Write FDPIC modules into xipfs at run time, the way a download
+		would, then run them.  Their text is executed directly out of
+		flash and shared between concurrent instances, while each
+		instance gets its own data.
+
+		Subcommands:
+
+		  qsort   one self-contained module, two instances
+		  solib   a shared library across two instances
+		  cxx     the same in C++, checking global constructors ran
+		  jmprel  a module whose imports are all in DT_JMPREL
+
+		With no subcommand, qsort runs.
+
+		The modules are embedded in the image as C headers.  Their
+		sources are in modules/, which rebuilds the headers on an
+		explicit 'make regen': linking one needs arm-uclinuxfdpiceabi
+		binutils, which this build does not.
+
+		This demonstrates; it does not assert.  For the assertions see
+		the fdpic and reject sections of CONFIG_TESTING_FS_XIPFS.
+
+if EXAMPLES_FDPICXIP
+
+config EXAMPLES_FDPICXIP_MOUNTPT
+	string "xipfs mountpoint"
+	default "/mnt/xipfs"
+
+endif # EXAMPLES_FDPICXIP

examples/fdpicxip/Make.defs

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+############################################################################
+# apps/examples/fdpicxip/Make.defs
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# 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.
+#
+############################################################################
+
+ifneq ($(CONFIG_EXAMPLES_FDPICXIP),)
+CONFIGURED_APPS += $(APPDIR)/examples/fdpicxip
+endif

examples/fdpicxip/Makefile

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+############################################################################
+# apps/examples/fdpicxip/Makefile
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# 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 $(APPDIR)/Make.defs
+
+# FDPIC modules executed in place from xipfs.  The modules are embedded as
+# headers, built from the sources in modules/ by an explicit 'make regen'
+# there: linking one needs arm-uclinuxfdpiceabi binutils, which this build
+# does not.
+
+MAINSRC   = fdpicxip_main.c
+
+PROGNAME  = fdpicxip
+PRIORITY  = SCHED_PRIORITY_DEFAULT
+STACKSIZE = $(CONFIG_DEFAULT_TASK_STACKSIZE)
+MODULE    = $(CONFIG_EXAMPLES_FDPICXIP)
+
+include $(APPDIR)/Application.mk