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chao an
52482219c8
Renaming "modlib" to "libelf" is more in line with the implementation content, which makes it easier for individual developers to understand the capabilities of this module. CONFIG_LIBC_MODLIB -> CONFIG_LIBC_ELF Signed-off-by: chao an <anchao.archer@bytedance.com>
80 lines
2.8 KiB
C
80 lines
2.8 KiB
C
/****************************************************************************
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* libs/libc/dlfcn/lib_dlsymtab.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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/lib/elf.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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libelf_setsymtab(symtab, nsymbols);
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return OK;
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#endif
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}
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