3c30cf1f05
task_spawn() and posix_spawn() are NuttX OS interfaces. In PROTECTED and KERNEL build modes, then can be reached from applications only via a system call. Currently, the number of parameters in a system call is limited to six; these spawn function have seven parameters. Rather than extend the maximum number of parameters across all architectures, I opted instead to marshal the seven parameters into a structure.
*
In order to support builtin in function in protected mode, a task_spawn() system call must be supported. Unfortunately this is overly complex because there is a (soft) limit of 6 parameters in a system call; task_spawn has seven paramters. This is a soft limit but still difficult to extend because it involves assembly language changes to numerous architectures. Better to get more creative.
65 lines
2.5 KiB
Plaintext
65 lines
2.5 KiB
Plaintext
############################################################################
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# libs/libc/spawn/Make.defs
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#
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# Copyright (C) 2013 Gregory Nutt. All rights reserved.
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# Author: Gregory Nutt <gnutt@nuttx.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# 3. Neither the name NuttX nor the names of its contributors may be
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# used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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############################################################################
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# Add the spawn C files to the build
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CSRCS += lib_psfa_addaction.c lib_psfa_addclose.c lib_psfa_adddup2.c
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CSRCS += lib_psfa_addopen.c lib_psfa_destroy.c lib_psfa_init.c
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ifeq ($(CONFIG_DEBUG_FEATURES),y)
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CSRCS += lib_psfa_dump.c
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endif
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CSRCS += lib_psa_getflags.c lib_psa_getschedparam.c lib_psa_getschedpolicy.c
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CSRCS += lib_psa_init.c lib_psa_setflags.c lib_psa_setschedparam.c
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CSRCS += lib_psa_setschedpolicy.c lib_psa_getsigmask.c lib_psa_setsigmask.c
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ifneq ($(CONFIG_BUILD_KERNEL),y)
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CSRCS += lib_psa_getstacksize.c lib_psa_setstacksize.c
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endif
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ifeq ($(CONFIG_BUILD_PROTECTED),y)
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CSRCS += lib_task_spawn.c
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endif
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ifeq ($(CONFIG_DEBUG_FEATURES),y)
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CSRCS += lib_psa_dump.c
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endif
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# Add the spawn directory to the build
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DEPPATH += --dep-path spawn
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VPATH += :spawn
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