69 lines
2.7 KiB
C
69 lines
2.7 KiB
C
/****************************************************************************
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* sched/module/mod_modsym.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 <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: modsym
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*
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* Description:
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* modsym() returns the address of a symbol defined within the object that
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* was previously made accessible through a insmod() call. handle is the
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* value returned from a call to insmod() (and which has not since been
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* released via a call to rmmod()), name is the symbol's name as a
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* character string.
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*
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* The returned symbol address will remain valid until rmmod() is called.
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*
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* Input Parameters:
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* handle - The opaque, non-NULL value returned by a previous successful
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* call to insmod().
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* name - A pointer to the symbol name string.
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*
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* Returned Value:
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* The address associated with the symbol is returned on success.
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* If handle does not refer to a valid module opened by insmod(), or if
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* the named symbol cannot be found within any of the objects associated
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* with handle, modsym() will return NULL and the errno variable will be
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* set appropriately.
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*
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* NOTE: This means that the address zero can never be a valid return
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* value.
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*
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****************************************************************************/
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FAR const void *modsym(FAR void *handle, FAR const char *name)
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{
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return modlib_getsymbol(handle, name);
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}
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