ebcb03dce9
to unify the inclusion of symtab.h only from the source files Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/****************************************************************************
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* libs/libc/symtab/symtab_allsyms.c
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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/allsyms.h>
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#include <nuttx/symtab.h>
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/****************************************************************************
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* Public Data
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****************************************************************************/
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extern const struct symtab_s g_allsyms[];
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extern const int g_nallsyms;
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/****************************************************************************
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* Name: allsyms_lookup
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*
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* Description:
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* Find the symbol in the symbol table with the matching name.
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*
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* Returned Value:
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* A reference to the symbol table entry if an entry with the matching
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* name is found; NULL is returned if the entry is not found.
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*
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****************************************************************************/
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static FAR const struct symtab_s *
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allsyms_lookup(FAR const char *name, FAR void *value,
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FAR size_t *size)
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{
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FAR const struct symtab_s *symbol = NULL;
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if (name)
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{
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symbol = symtab_findbyname(g_allsyms, name, g_nallsyms);
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}
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else if (value)
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{
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symbol = symtab_findbyvalue(g_allsyms, value, g_nallsyms);
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}
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if (symbol && symbol != &g_allsyms[g_nallsyms - 1])
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{
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*size = (symbol + 1)->sym_value - symbol->sym_value;
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}
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else
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{
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*size = 0;
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}
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return symbol;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: allsyms_findbyname
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*
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* Description:
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* Find the symbol in the symbol table with the matching name.
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*
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* Returned Value:
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* A reference to the symbol table entry if an entry with the matching
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* name is found; NULL is returned if the entry is not found.
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*
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****************************************************************************/
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FAR const struct symtab_s *allsyms_findbyname(FAR const char *name,
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FAR size_t *size)
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{
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return allsyms_lookup(name, NULL, size);
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}
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/****************************************************************************
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* Name: symtab_findbyvalue
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*
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* Description:
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* Find the symbol in the symbol table whose value closest (but not greater
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* than), the provided value. This version assumes that table is not
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* ordered with respect to symbol value and, hence, access time will be
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* linear with respect to nsyms.
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*
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* Returned Value:
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* A reference to the symbol table entry if an entry with the matching
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* name is found; NULL is returned if the entry is not found.
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*
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****************************************************************************/
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FAR const struct symtab_s *allsyms_findbyvalue(FAR void *value,
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FAR size_t *size)
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{
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return allsyms_lookup(NULL, value, size);
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}
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