93 lines
3.5 KiB
C
93 lines
3.5 KiB
C
/****************************************************************************
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* libs/libc/dlfcn/lib_symtab.c
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*
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* Copyright (C) 2017 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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <dlfcn.h>
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#include <errno.h>
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#include <nuttx/module.h>
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#include <nuttx/lib/modlib.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: dlsymtab
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*
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* Description:
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* dlsymtab() is a non-standard shared library interface. It selects the
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* symbol table to use when binding a shared library to the base firmware
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* which may be in FLASH memory.
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*
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* Input Parameters:
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* symtab - The new symbol table.
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* nsymbols - The number of symbols in the symbol table.
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*
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* Returned Value:
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* Always returns OK.
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*
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****************************************************************************/
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int dlsymtab(FAR const struct symtab_s *symtab, int nsymbols)
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{
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#ifdef CONFIG_BUILD_KERNEL
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/* The KERNEL build is considerably more complex: In order to be shared,
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* the .text portion of the module must be (1) build for PIC/PID operation
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* and (2) must like in a shared memory region accessible from all
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* processes. The .data/.bss portion of the module must be allocated in
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* the user space of each process, but must lie at the same virtual address
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* so that it can be referenced from the one copy of the text in the shared
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* memory region.
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*/
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#warning Missing logic
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return -ENOSYS;
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#else
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/* Set the symbol take information that will be used by this instance of
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* the module library.
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*/
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modlib_setsymtab(symtab, nsymbols);
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return OK;
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#endif
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}
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