131 lines
4.1 KiB
C
131 lines
4.1 KiB
C
/****************************************************************************
|
|
* libs/libc/modlib/modlib_symtab.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <assert.h>
|
|
|
|
#include <nuttx/symtab.h>
|
|
#include <nuttx/lib/modlib.h>
|
|
#include <nuttx/symtab.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_MODLIB_HAVE_SYMTAB
|
|
/* Symbol table used by dlsym */
|
|
|
|
# ifndef CONFIG_MODLIB_SYMTAB_ARRAY
|
|
# error "CONFIG_MODLIB_SYMTAB_ARRAY must be defined"
|
|
# endif
|
|
|
|
/* Number of Symbols in the Table */
|
|
|
|
# ifndef CONFIG_MODLIB_NSYMBOLS_VAR
|
|
# error "CONFIG_MODLIB_NSYMBOLS_VAR must be defined"
|
|
# endif
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_MODLIB_HAVE_SYMTAB
|
|
extern const struct symtab_s CONFIG_MODLIB_SYMTAB_ARRAY[];
|
|
extern int CONFIG_MODLIB_NSYMBOLS_VAR;
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
static FAR const struct symtab_s *g_modlib_symtab;
|
|
static int g_modlib_nsymbols;
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: modlib_getsymtab
|
|
*
|
|
* Description:
|
|
* Get the current kernel symbol table selection as an atomic operation.
|
|
*
|
|
* Input Parameters:
|
|
* symtab - The location to store the symbol table.
|
|
* nsymbols - The location to store the number of symbols in the symbol
|
|
* table.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void modlib_getsymtab(FAR const struct symtab_s **symtab, FAR int *nsymbols)
|
|
{
|
|
DEBUGASSERT(symtab != NULL && nsymbols != NULL);
|
|
|
|
/* Borrow the registry lock to assure atomic access */
|
|
|
|
modlib_registry_lock();
|
|
#ifdef CONFIG_MODLIB_HAVE_SYMTAB
|
|
if (g_modlib_symtab == NULL)
|
|
{
|
|
g_modlib_symtab = CONFIG_MODLIB_SYMTAB_ARRAY;
|
|
g_modlib_nsymbols = CONFIG_MODLIB_NSYMBOLS_VAR;
|
|
}
|
|
#endif
|
|
|
|
*symtab = g_modlib_symtab;
|
|
*nsymbols = g_modlib_nsymbols;
|
|
modlib_registry_unlock();
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: modlib_setsymtab
|
|
*
|
|
* Description:
|
|
* Select a new kernel symbol table selection as an atomic operation.
|
|
*
|
|
* Input Parameters:
|
|
* symtab - The new symbol table.
|
|
* nsymbols - The number of symbols in the symbol table.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void modlib_setsymtab(FAR const struct symtab_s *symtab, int nsymbols)
|
|
{
|
|
/* Borrow the registry lock to assure atomic access */
|
|
|
|
modlib_registry_lock();
|
|
g_modlib_symtab = symtab;
|
|
g_modlib_nsymbols = nsymbols;
|
|
modlib_registry_unlock();
|
|
}
|