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Optional canned symtab inclusion to the build. When option CONFIG_LIBC_SYMTAB is selected and symbol table file libc/symtab/canned_symtab.inc is prepared then application can use system provided complete symbol table. The option has substantial effect on system image size. Mainly code/text. If loading of applications at runtime is not planned do not select this. From Pavel Pisa.
This commit is contained in:
Pavel Pisa
Gregory Nutt
@@ -195,6 +195,8 @@ config EXECFUNCS_NSYMBOLS
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symbols in that table. This selection provides the number of
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symbols in the symbol table.
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source libc/symtab/Kconfig
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endif # EXECFUNCS_HAVE_SYMTAB
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endif # LIBC_EXECFUNCS
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@@ -84,6 +84,7 @@ include queue/Make.defs
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include wqueue/Make.defs
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include misc/Make.defs
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include audio/Make.defs
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include symtab/Make.defs
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# REVISIT: Backslash causes problems in $(COBJS) target
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DELIM := $(strip /)
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@@ -0,0 +1,14 @@
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#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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config LIBC_SYMTAB
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bool "Include canned symtab for applications and shell"
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default n
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depends on EXECFUNCS_HAVE_SYMTAB
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---help---
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Build and include default symbol table in the NuttX library.
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The symbol table is selected by call canned_symtab_initialize().
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The table libc/symtab/canned_symtab.inc has to be generated
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by mksymtab manually before this option is selected.
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@@ -0,0 +1,45 @@
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############################################################################
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# libc/symtab/Make.defs
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#
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# Copyright (C) 2015 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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ifeq ($(CONFIG_LIBC_SYMTAB),y)
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# Include canned symtab to the build
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CSRCS += lib_symtab.c
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DEPPATH += --dep-path symtab
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VPATH += :symtab
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endif
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@@ -0,0 +1,19 @@
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symtab
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======
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This directory provide support for canned symbol table which provides
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all/most of system and libc services/functions to the application and NSH.
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The support is selected by CONFIG_LIBC_SYMTAB option and table has to be
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prepared in advance manually.
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It can be prepared from NuttX top level directory by next commands
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cat syscall/syscall.csv libc/libc.csv | sort >libc/symtab/canned_symtab.csv
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tools/mksymtab libc/symtab/canned_symtab.csv libc/symtab/canned_symtab.inc
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Next code selectes canned symtab from application:
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#include <nuttx/binfmt/canned_symtab.h>
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...
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canned_symtab_initialize();
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@@ -0,0 +1,61 @@
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/****************************************************************************
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* libc/symtab/lib_symtab.c
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Canned symtab implemented by Pavel Pisa <ppisa@pikron.com>
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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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#include <nuttx/config.h>
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#ifdef CONFIG_LIBC_SYMTAB
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/compiler.h>
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#include <nuttx/binfmt/symtab.h>
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#include <nuttx/binfmt/canned_symtab.h>
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#include "canned_symtab.inc"
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/************************************************************************
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* Public Functions
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************************************************************************/
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void canned_symtab_initialize(void)
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{
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exec_setsymtab(g_symtab, NSYMBOLS);
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}
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#endif /* CONFIG_LIBC_SYMTAB */
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