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nuttx/tools/LibTargets.mk
Pavel Pisa 380198c985 symtab/, tools/: NuttX provides lists of available syscalls and library functions and tools to process them. The lists can be used to build symbol table which allows runtime program loading which can reuse functions already compiled into NuttX system image. List processing, compilation and linking to the final system image has been possible only under manual control until now. 
Provided changes add option (CONFIG_EXECFUNCS_GENERATE_SYSTEM_SYMTAB) to build complete list of available functions and syscalls automatically.  The symbolic table is generated in form libsymtab.a which can be reused by application or directly pull in when "g_symtab" and "g_nsymbols" variables are requested by EXECFUNCS configuration.

I have tried to follow mechanisms for library compilation in different kernel protection modes but tested only flat no-MMU build. The basic assumption is that this library and libraries providing syscall stubs and C-library functions are available in user-space context and initial application (usually NSH) registers the symbol table through IOCTL.  The table can be reused then by another applications in their address space as kernel allows. Simple for flat or protected mode, I am not sure if really support in MMU mode. It is highly probable that I have made some mistake, overlooked something, but functionality is optional (should not cause troubles in any mode if disabled) and main purpose is to lower memory overhead when more applications are loaded on memory constrained system which usually use direct kernel calling without protection or address space separation. If the table should be provided by kernel to applications then makefiles has to be adjusted.
2019-08-13 09:09:43 -06:00

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############################################################################
# tools/LibTargets.mk
#
# Copyright (C) 2007-2012, 2014, 2019 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
# Archive targets. The target build sequence will first create a series of
# libraries, one per configured source file directory. The final NuttX
# execution will then be built from those libraries. The following targets
# build those libraries.
#
# Possible kernel-mode builds
libs$(DELIM)libc$(DELIM)libkc$(LIBEXT): context
$(Q) $(MAKE) -C libs$(DELIM)libc TOPDIR="$(TOPDIR)" libkc$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libkc$(LIBEXT): libs$(DELIM)libc$(DELIM)libkc$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
libs$(DELIM)libnx$(DELIM)libknx$(LIBEXT): context
$(Q) $(MAKE) -C libs$(DELIM)libnx TOPDIR="$(TOPDIR)" libknx$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libknx$(LIBEXT): libs$(DELIM)libnx$(DELIM)libknx$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
mm$(DELIM)libkmm$(LIBEXT): context
$(Q) $(MAKE) -C mm TOPDIR="$(TOPDIR)" libkmm$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libkmm$(LIBEXT): mm$(DELIM)libkmm$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
$(ARCH_SRC)$(DELIM)libkarch$(LIBEXT): context
$(Q) $(MAKE) -C $(ARCH_SRC) TOPDIR="$(TOPDIR)" libkarch$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libkarch$(LIBEXT): $(ARCH_SRC)$(DELIM)libkarch$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
pass1$(DELIM)libpass1$(LIBEXT): context
$(Q) $(MAKE) -C pass1 TOPDIR="$(TOPDIR)" libpass1$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libpass1$(LIBEXT): pass1$(DELIM)libpass1$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
sched$(DELIM)libsched$(LIBEXT): context
$(Q) $(MAKE) -C sched TOPDIR="$(TOPDIR)" libsched$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libsched$(LIBEXT): sched$(DELIM)libsched$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
net$(DELIM)libnet$(LIBEXT): context
$(Q) $(MAKE) -C net TOPDIR="$(TOPDIR)" libnet$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libnet$(LIBEXT): net$(DELIM)libnet$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
boards$(DELIM)libboards$(LIBEXT): context
$(Q) $(MAKE) -C boards TOPDIR="$(TOPDIR)" libboards$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libboards$(LIBEXT): boards$(DELIM)libboards$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
crypto$(DELIM)libcrypto$(LIBEXT): context
$(Q) $(MAKE) -C crypto TOPDIR="$(TOPDIR)" libcrypto$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libcrypto$(LIBEXT): crypto$(DELIM)libcrypto$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
fs$(DELIM)libfs$(LIBEXT): context
$(Q) $(MAKE) -C fs TOPDIR="$(TOPDIR)" libfs$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libfs$(LIBEXT): fs$(DELIM)libfs$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
drivers$(DELIM)libdrivers$(LIBEXT): context
$(Q) $(MAKE) -C drivers TOPDIR="$(TOPDIR)" libdrivers$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libdrivers$(LIBEXT): drivers$(DELIM)libdrivers$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
binfmt$(DELIM)libbinfmt$(LIBEXT): context
$(Q) $(MAKE) -C binfmt TOPDIR="$(TOPDIR)" libbinfmt$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libbinfmt$(LIBEXT): binfmt$(DELIM)libbinfmt$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
graphics$(DELIM)libgraphics$(LIBEXT): context
$(Q) $(MAKE) -C graphics TOPDIR="$(TOPDIR)" libgraphics$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libgraphics$(LIBEXT): graphics$(DELIM)libgraphics$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
audio$(DELIM)libaudio$(LIBEXT): context
$(Q) $(MAKE) -C audio TOPDIR="$(TOPDIR)" libaudio$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libaudio$(LIBEXT): audio$(DELIM)libaudio$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
video$(DELIM)libvideo$(LIBEXT): context
$(Q) $(MAKE) -C video TOPDIR="$(TOPDIR)" libvideo$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libvideo$(LIBEXT): video$(DELIM)libvideo$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
wireless$(DELIM)libwireless$(LIBEXT): context
$(Q) $(MAKE) -C wireless TOPDIR="$(TOPDIR)" libwireless$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libwireless$(LIBEXT): wireless$(DELIM)libwireless$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
$(ARCH_SRC)$(DELIM)libarch$(LIBEXT): context
$(Q) $(MAKE) -C $(ARCH_SRC) TOPDIR="$(TOPDIR)" libarch$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libarch$(LIBEXT): $(ARCH_SRC)$(DELIM)libarch$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
libs$(DELIM)libdsp$(DELIM)libdsp$(LIBEXT): context
$(Q) $(MAKE) -C libs$(DELIM)libdsp TOPDIR="$(TOPDIR)" libdsp$(LIBEXT) KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libdsp$(LIBEXT): libs$(DELIM)libdsp$(DELIM)libdsp$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
# Special case
syscall$(DELIM)libstubs$(LIBEXT): context
$(Q) $(MAKE) -C syscall TOPDIR="$(TOPDIR)" libstubs$(LIBEXT) # KERNEL=y EXTRADEFINES=$(KDEFINE)
staging$(DELIM)libstubs$(LIBEXT): syscall$(DELIM)libstubs$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
# Possible user-mode builds
libs$(DELIM)libc$(DELIM)libuc$(LIBEXT): context
$(Q) $(MAKE) -C libs$(DELIM)libc TOPDIR="$(TOPDIR)" libuc$(LIBEXT) KERNEL=n
staging$(DELIM)libuc$(LIBEXT): libs$(DELIM)libc$(DELIM)libuc$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
libs$(DELIM)libnx$(DELIM)libunx$(LIBEXT): context
$(Q) $(MAKE) -C libs$(DELIM)libnx TOPDIR="$(TOPDIR)" libunx$(LIBEXT) KERNEL=n
staging$(DELIM)libunx$(LIBEXT): libs$(DELIM)libnx$(DELIM)libunx$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
mm$(DELIM)libumm$(LIBEXT): context
$(Q) $(MAKE) -C mm TOPDIR="$(TOPDIR)" libumm$(LIBEXT) KERNEL=n
staging$(DELIM)libumm$(LIBEXT): mm$(DELIM)libumm$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
$(ARCH_SRC)$(DELIM)libuarch$(LIBEXT): context
$(Q) $(MAKE) -C $(ARCH_SRC) TOPDIR="$(TOPDIR)" libuarch$(LIBEXT) KERNEL=n
staging$(DELIM)libuarch$(LIBEXT): $(ARCH_SRC)$(DELIM)libuarch$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
libs$(DELIM)libxx$(DELIM)$(LIBXX)$(LIBEXT): context
$(Q) $(MAKE) -C libs$(DELIM)libxx TOPDIR="$(TOPDIR)" $(LIBXX)$(LIBEXT) KERNEL=n
staging$(DELIM)$(LIBXX)$(LIBEXT): libs$(DELIM)libxx$(DELIM)$(LIBXX)$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
$(APPDIR)$(DELIM)libapps$(LIBEXT): context
$(Q) $(MAKE) -C $(APPDIR) TOPDIR="$(TOPDIR)" libapps$(LIBEXT) KERNEL=n
staging$(DELIM)libapps$(LIBEXT): $(APPDIR)$(DELIM)libapps$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
syscall$(DELIM)libproxies$(LIBEXT): context
$(Q) $(MAKE) -C syscall TOPDIR="$(TOPDIR)" libproxies$(LIBEXT) KERNEL=n
staging$(DELIM)libproxies$(LIBEXT): syscall$(DELIM)libproxies$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
symtab$(DELIM)libsymtab$(LIBEXT): context
$(Q) $(MAKE) -C symtab TOPDIR="$(TOPDIR)" libsymtab$(LIBEXT) KERNEL=n
staging$(DELIM)libsymtab$(LIBEXT): symtab$(DELIM)libsymtab$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
# Possible non-kernel builds
libs$(DELIM)libc$(DELIM)libc$(LIBEXT): context
$(Q) $(MAKE) -C libs$(DELIM)libc TOPDIR="$(TOPDIR)" libc$(LIBEXT)
staging$(DELIM)libc$(LIBEXT): libs$(DELIM)libc$(DELIM)libc$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
libs$(DELIM)libnx$(DELIM)libnx$(LIBEXT): context
$(Q) $(MAKE) -C libs$(DELIM)libnx TOPDIR="$(TOPDIR)" libnx$(LIBEXT)
staging$(DELIM)libnx$(LIBEXT): libs$(DELIM)libnx$(DELIM)libnx$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
mm$(DELIM)libmm$(LIBEXT): context
$(Q) $(MAKE) -C mm TOPDIR="$(TOPDIR)" libmm$(LIBEXT)
staging$(DELIM)libmm$(LIBEXT): mm$(DELIM)libmm$(LIBEXT)
$(Q) $(call INSTALL_LIB,$<,$@)
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