2015-12-10 16:53:31 +01:00
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/****************************************************************************
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2018-05-29 21:21:26 +02:00
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* libs/libc/modlib/modlib_symbols.c
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2015-12-10 16:53:31 +01:00
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*
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2020-04-13 17:03:46 +02:00
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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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2015-12-10 16:53:31 +01:00
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*
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2020-04-13 17:03:46 +02:00
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* http://www.apache.org/licenses/LICENSE-2.0
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2015-12-10 16:53:31 +01:00
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*
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2020-04-13 17:03:46 +02:00
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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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2015-12-10 16:53:31 +01:00
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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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2020-11-22 02:15:04 +01:00
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#include <inttypes.h>
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#include <stdint.h>
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2015-12-10 16:53:31 +01:00
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <debug.h>
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2023-07-08 23:23:32 +02:00
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#include <nuttx/symtab.h>
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2017-01-29 15:24:42 +01:00
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#include <nuttx/lib/modlib.h>
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2015-12-10 16:53:31 +01:00
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2022-09-26 08:22:03 +02:00
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#include "libc.h"
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2017-01-29 18:17:29 +01:00
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#include "modlib/modlib.h"
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2015-12-10 16:53:31 +01:00
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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2017-01-27 18:43:27 +01:00
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/* Return values search for exported modules */
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#define SYM_NOT_FOUND 0
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#define SYM_FOUND 1
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct mod_exportinfo_s
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{
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FAR const char *name; /* Symbol name to find */
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FAR struct module_s *modp; /* The module that needs the symbol */
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FAR const struct symtab_s *symbol; /* Symbol info returned (if found) */
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};
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2023-07-09 00:16:11 +02:00
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struct eptable_s
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2022-09-26 08:22:03 +02:00
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{
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2023-07-09 00:16:11 +02:00
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FAR uint8_t *epname; /* Name of global symbol */
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FAR void *epaddr; /* Address of global symbol */
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2022-09-26 08:22:03 +02:00
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};
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2023-07-09 00:16:11 +02:00
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/****************************************************************************
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* Public Data
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****************************************************************************/
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extern struct eptable_s global_table[];
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extern int nglobals;
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2015-12-10 16:53:31 +01:00
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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2017-01-29 18:17:29 +01:00
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* Name: modlib_symname
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2015-12-10 16:53:31 +01:00
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*
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* Description:
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* Get the symbol name in loadinfo->iobuffer[].
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*
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* Returned Value:
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* 0 (OK) is returned on success and a negated errno is returned on
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* failure.
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*
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2020-03-10 06:52:58 +01:00
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* EINVAL - There is something inconsistent in the symbol table (should
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* only happen if the file is corrupted).
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2015-12-10 16:53:31 +01:00
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* ESRCH - Symbol has no name
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*
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****************************************************************************/
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2017-01-29 18:17:29 +01:00
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static int modlib_symname(FAR struct mod_loadinfo_s *loadinfo,
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2022-09-26 08:22:03 +02:00
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FAR const Elf_Sym *sym, Elf_Off sh_offset)
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2015-12-10 16:53:31 +01:00
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{
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FAR uint8_t *buffer;
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off_t offset;
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size_t readlen;
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size_t bytesread;
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int ret;
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/* Get the file offset to the string that is the name of the symbol. The
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* st_name member holds an offset into the file's symbol string table.
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*/
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if (sym->st_name == 0)
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{
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2018-06-01 18:10:17 +02:00
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berr("ERROR: Symbol has no name\n");
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2015-12-10 16:53:31 +01:00
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return -ESRCH;
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}
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2023-07-15 16:24:43 +02:00
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/* Allocate an I/O buffer. This buffer is used by mod_symname() to
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* accumulate the variable length symbol name.
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*/
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ret = modlib_allocbuffer(loadinfo);
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if (ret < 0)
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{
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berr("ERROR: modlib_allocbuffer failed: %d\n", ret);
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return -ENOMEM;
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}
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2022-09-26 08:22:03 +02:00
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offset = sh_offset + sym->st_name;
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2015-12-10 16:53:31 +01:00
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/* Loop until we get the entire symbol name into memory */
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bytesread = 0;
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for (; ; )
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{
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/* Get the number of bytes to read */
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readlen = loadinfo->buflen - bytesread;
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if (offset + readlen > loadinfo->filelen)
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{
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if (loadinfo->filelen <= offset)
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{
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2018-06-01 18:10:17 +02:00
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berr("ERROR: At end of file\n");
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2015-12-10 16:53:31 +01:00
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return -EINVAL;
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}
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readlen = loadinfo->filelen - offset;
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}
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/* Read that number of bytes into the array */
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buffer = &loadinfo->iobuffer[bytesread];
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2017-01-29 18:17:29 +01:00
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ret = modlib_read(loadinfo, buffer, readlen, offset);
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2015-12-10 16:53:31 +01:00
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if (ret < 0)
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{
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2018-06-01 18:10:17 +02:00
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berr("ERROR: modlib_read failed: %d\n", ret);
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2015-12-10 16:53:31 +01:00
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return ret;
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}
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bytesread += readlen;
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/* Did we read the NUL terminator? */
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if (memchr(buffer, '\0', readlen) != NULL)
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{
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/* Yes, the buffer contains a NUL terminator. */
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return OK;
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}
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/* No.. then we have to read more */
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2017-01-29 18:17:29 +01:00
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ret = modlib_reallocbuffer(loadinfo, CONFIG_MODLIB_BUFFERINCR);
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2015-12-10 16:53:31 +01:00
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if (ret < 0)
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{
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2018-06-01 18:10:17 +02:00
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berr("ERROR: mod_reallocbuffer failed: %d\n", ret);
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2015-12-10 16:53:31 +01:00
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return ret;
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}
|
2022-09-26 08:22:03 +02:00
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offset += CONFIG_MODLIB_BUFFERINCR;
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2015-12-10 16:53:31 +01:00
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}
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/* We will not get here */
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return OK;
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}
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2017-01-27 18:43:27 +01:00
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/****************************************************************************
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2017-01-29 18:17:29 +01:00
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* Name: modlib_symcallback
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2017-01-27 18:43:27 +01:00
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*
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* Description:
|
2020-03-10 06:52:58 +01:00
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* modlib_registry_foreach() callback function. Test if the provided
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* module, modp, exports the symbol of interest. If so, return that symbol
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* value and setup the module dependency relationship.
|
2017-01-27 18:43:27 +01:00
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*
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* Returned Value:
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* 0 (OK) is returned on success and a negated errno is returned on
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* failure.
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*
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****************************************************************************/
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2017-01-29 18:17:29 +01:00
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static int modlib_symcallback(FAR struct module_s *modp, FAR void *arg)
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2017-01-27 18:43:27 +01:00
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{
|
2020-03-10 06:52:58 +01:00
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FAR struct mod_exportinfo_s *exportinfo = (FAR struct mod_exportinfo_s *)
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arg;
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2017-01-27 18:43:27 +01:00
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/* Check if this module exports a symbol of that name */
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exportinfo->symbol = symtab_findbyname(modp->modinfo.exports,
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exportinfo->name,
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modp->modinfo.nexports);
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|
2020-03-10 06:52:58 +01:00
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if (exportinfo->symbol != NULL)
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{
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/* Yes.. save the dependency relationship and return SYM_FOUND to
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* stop the traversal.
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*/
|
2017-01-27 18:43:27 +01:00
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2023-10-05 13:42:23 +02:00
|
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#if CONFIG_MODLIB_MAXDEPEND > 0
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int ret = modlib_depend(exportinfo->modp, modp);
|
2020-03-10 06:52:58 +01:00
|
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if (ret < 0)
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|
{
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berr("ERROR: modlib_depend failed: %d\n", ret);
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return ret;
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}
|
2023-10-05 13:42:23 +02:00
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#endif
|
2017-01-27 18:43:27 +01:00
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|
2020-03-10 06:52:58 +01:00
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return SYM_FOUND;
|
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|
|
}
|
2017-01-27 18:43:27 +01:00
|
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|
2020-03-10 06:52:58 +01:00
|
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return SYM_NOT_FOUND;
|
2017-01-27 18:43:27 +01:00
|
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}
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|
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|
|
2015-12-10 16:53:31 +01:00
|
|
|
/****************************************************************************
|
|
|
|
* Public Functions
|
|
|
|
****************************************************************************/
|
|
|
|
|
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|
|
/****************************************************************************
|
2017-01-29 18:17:29 +01:00
|
|
|
* Name: modlib_findsymtab
|
2015-12-10 16:53:31 +01:00
|
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*
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|
|
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* Description:
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|
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* Find the symbol table section.
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*
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* Returned Value:
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|
* 0 (OK) is returned on success and a negated errno is returned on
|
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* failure.
|
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*
|
|
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|
****************************************************************************/
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|
2017-01-29 18:17:29 +01:00
|
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int modlib_findsymtab(FAR struct mod_loadinfo_s *loadinfo)
|
2015-12-10 16:53:31 +01:00
|
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{
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int i;
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|
|
|
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|
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/* Find the symbol table section header and its associated string table */
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for (i = 1; i < loadinfo->ehdr.e_shnum; i++)
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{
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if (loadinfo->shdr[i].sh_type == SHT_SYMTAB)
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{
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loadinfo->symtabidx = i;
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loadinfo->strtabidx = loadinfo->shdr[i].sh_link;
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break;
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}
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}
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|
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|
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/* Verify that there is a symbol and string table */
|
|
|
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|
if (loadinfo->symtabidx == 0)
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{
|
2018-06-01 18:10:17 +02:00
|
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berr("ERROR: No symbols in ELF file\n");
|
2015-12-10 16:53:31 +01:00
|
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|
return -EINVAL;
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|
}
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return OK;
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|
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}
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|
|
|
/****************************************************************************
|
2017-01-29 18:17:29 +01:00
|
|
|
* Name: modlib_readsym
|
2015-12-10 16:53:31 +01:00
|
|
|
*
|
|
|
|
* Description:
|
2019-01-26 18:18:45 +01:00
|
|
|
* Read the ELF symbol structure at the specified index into memory.
|
2015-12-10 16:53:31 +01:00
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* loadinfo - Load state information
|
|
|
|
* index - Symbol table index
|
|
|
|
* sym - Location to return the table entry
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
|
|
* failure.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2017-01-29 18:17:29 +01:00
|
|
|
int modlib_readsym(FAR struct mod_loadinfo_s *loadinfo, int index,
|
2022-09-26 08:22:03 +02:00
|
|
|
FAR Elf_Sym *sym, FAR Elf_Shdr *symtab)
|
2015-12-10 16:53:31 +01:00
|
|
|
{
|
|
|
|
off_t offset;
|
|
|
|
|
|
|
|
/* Verify that the symbol table index lies within symbol table */
|
|
|
|
|
2020-02-08 00:10:23 +01:00
|
|
|
if (index < 0 || index > (symtab->sh_size / sizeof(Elf_Sym)))
|
2015-12-10 16:53:31 +01:00
|
|
|
{
|
2018-06-01 18:10:17 +02:00
|
|
|
berr("ERROR: Bad relocation symbol index: %d\n", index);
|
2015-12-10 16:53:31 +01:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Get the file offset to the symbol table entry */
|
|
|
|
|
2020-02-08 00:10:23 +01:00
|
|
|
offset = symtab->sh_offset + sizeof(Elf_Sym) * index;
|
2015-12-10 16:53:31 +01:00
|
|
|
|
|
|
|
/* And, finally, read the symbol table entry into memory */
|
|
|
|
|
2020-02-08 00:10:23 +01:00
|
|
|
return modlib_read(loadinfo, (FAR uint8_t *)sym, sizeof(Elf_Sym), offset);
|
2015-12-10 16:53:31 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
2017-01-29 18:54:54 +01:00
|
|
|
* Name: modlib_symvalue
|
2015-12-10 16:53:31 +01:00
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Get the value of a symbol. The updated value of the symbol is returned
|
|
|
|
* in the st_value field of the symbol table entry.
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
2022-09-26 08:22:03 +02:00
|
|
|
* modp - Module state information
|
|
|
|
* loadinfo - Load state information
|
|
|
|
* sym - Symbol table entry (value might be undefined)
|
|
|
|
* sh_offset - Offset of strtab
|
2015-12-10 16:53:31 +01:00
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
|
|
* failure.
|
|
|
|
*
|
2020-03-10 06:52:58 +01:00
|
|
|
* EINVAL - There is something inconsistent in the symbol table (should
|
|
|
|
* only happen if the file is corrupted).
|
2015-12-10 16:53:31 +01:00
|
|
|
* ENOSYS - Symbol lies in common
|
|
|
|
* ESRCH - Symbol has no name
|
|
|
|
* ENOENT - Symbol undefined and not provided via a symbol table
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2017-01-29 18:54:54 +01:00
|
|
|
int modlib_symvalue(FAR struct module_s *modp,
|
2022-09-26 08:22:03 +02:00
|
|
|
FAR struct mod_loadinfo_s *loadinfo, FAR Elf_Sym *sym,
|
|
|
|
Elf_Off sh_offset)
|
2015-12-10 16:53:31 +01:00
|
|
|
{
|
|
|
|
FAR const struct symtab_s *symbol;
|
2017-01-27 18:43:27 +01:00
|
|
|
struct mod_exportinfo_s exportinfo;
|
2015-12-10 16:53:31 +01:00
|
|
|
uintptr_t secbase;
|
2018-11-08 14:27:14 +01:00
|
|
|
int nsymbols;
|
2015-12-10 16:53:31 +01:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
switch (sym->st_shndx)
|
|
|
|
{
|
|
|
|
case SHN_COMMON:
|
|
|
|
{
|
|
|
|
/* NuttX ELF modules should be compiled with -fno-common. */
|
|
|
|
|
2018-06-01 18:10:17 +02:00
|
|
|
berr("ERROR: SHN_COMMON: Re-compile with -fno-common\n");
|
2015-12-10 16:53:31 +01:00
|
|
|
return -ENOSYS;
|
|
|
|
}
|
|
|
|
|
|
|
|
case SHN_ABS:
|
|
|
|
{
|
|
|
|
/* st_value already holds the correct value */
|
|
|
|
|
2018-06-01 18:10:17 +02:00
|
|
|
binfo("SHN_ABS: st_value=%08lx\n", (long)sym->st_value);
|
2015-12-10 16:53:31 +01:00
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
case SHN_UNDEF:
|
|
|
|
{
|
|
|
|
/* Get the name of the undefined symbol */
|
|
|
|
|
2022-09-26 08:22:03 +02:00
|
|
|
ret = modlib_symname(loadinfo, sym, sh_offset);
|
2015-12-10 16:53:31 +01:00
|
|
|
if (ret < 0)
|
|
|
|
{
|
|
|
|
/* There are a few relocations for a few architectures that do
|
|
|
|
* no depend upon a named symbol. We don't know if that is the
|
|
|
|
* case here, but return and special error to the caller to
|
|
|
|
* indicate the nameless symbol.
|
|
|
|
*/
|
|
|
|
|
2018-06-01 18:10:17 +02:00
|
|
|
berr("ERROR: SHN_UNDEF: Failed to get symbol name: %d\n", ret);
|
2015-12-10 16:53:31 +01:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2017-01-27 18:43:27 +01:00
|
|
|
/* First check if the symbol is exported by an installed module.
|
|
|
|
* Newest modules are installed at the head of the list. Therefore,
|
|
|
|
* if the symbol is exported by numerous modules, then the most
|
|
|
|
* recently installed will take precedence.
|
|
|
|
*/
|
2015-12-10 16:53:31 +01:00
|
|
|
|
2017-01-27 18:43:27 +01:00
|
|
|
exportinfo.name = (FAR const char *)loadinfo->iobuffer;
|
|
|
|
exportinfo.modp = modp;
|
|
|
|
exportinfo.symbol = NULL;
|
|
|
|
|
2020-03-10 06:52:58 +01:00
|
|
|
ret = modlib_registry_foreach(modlib_symcallback,
|
|
|
|
(FAR void *)&exportinfo);
|
2017-01-27 18:43:27 +01:00
|
|
|
if (ret < 0)
|
|
|
|
{
|
2020-11-22 02:15:04 +01:00
|
|
|
berr("ERROR: modlib_symcallback failed: %d\n", ret);
|
2017-01-27 18:43:27 +01:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
symbol = exportinfo.symbol;
|
|
|
|
|
|
|
|
/* If the symbol is not exported by any module, then check if the
|
|
|
|
* base code exports a symbol of this name.
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (symbol == NULL)
|
|
|
|
{
|
2018-11-08 14:27:14 +01:00
|
|
|
modlib_getsymtab(&symbol, &nsymbols);
|
|
|
|
symbol = symtab_findbyname(symbol, exportinfo.name,
|
|
|
|
nsymbols);
|
2017-01-27 18:43:27 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Was the symbol found from any exporter? */
|
|
|
|
|
|
|
|
if (symbol == NULL)
|
2015-12-10 16:53:31 +01:00
|
|
|
{
|
2018-06-01 18:10:17 +02:00
|
|
|
berr("ERROR: SHN_UNDEF: Exported symbol \"%s\" not found\n",
|
2016-06-12 00:42:42 +02:00
|
|
|
loadinfo->iobuffer);
|
2015-12-10 16:53:31 +01:00
|
|
|
return -ENOENT;
|
|
|
|
}
|
|
|
|
|
2020-04-13 05:54:29 +02:00
|
|
|
/* Yes... add the exported symbol value to the ELF symbol tablei
|
|
|
|
* entry
|
|
|
|
*/
|
2015-12-10 16:53:31 +01:00
|
|
|
|
2020-11-22 02:15:04 +01:00
|
|
|
binfo("SHN_UNDEF: name=%s "
|
|
|
|
"%08" PRIxPTR "+%08" PRIxPTR "=%08" PRIxPTR "\n",
|
|
|
|
loadinfo->iobuffer,
|
|
|
|
(uintptr_t)sym->st_value, (uintptr_t)symbol->sym_value,
|
|
|
|
(uintptr_t)(sym->st_value + symbol->sym_value));
|
2015-12-10 16:53:31 +01:00
|
|
|
|
2020-03-26 07:44:54 +01:00
|
|
|
sym->st_value += ((uintptr_t)symbol->sym_value);
|
2015-12-10 16:53:31 +01:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
{
|
|
|
|
secbase = loadinfo->shdr[sym->st_shndx].sh_addr;
|
|
|
|
|
2022-09-26 08:22:03 +02:00
|
|
|
binfo("Other[%d]: %08" PRIxPTR "+%08" PRIxPTR "=%08" PRIxPTR "\n",
|
|
|
|
sym->st_shndx,
|
2020-11-22 02:15:04 +01:00
|
|
|
(uintptr_t)sym->st_value, secbase,
|
|
|
|
(uintptr_t)(sym->st_value + secbase));
|
2015-12-10 16:53:31 +01:00
|
|
|
|
|
|
|
sym->st_value += secbase;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return OK;
|
|
|
|
}
|
2022-09-26 08:22:03 +02:00
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: modlib_insertsymtab
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Insert a symbol into the modules exportinfo array.
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* modp - Module state information
|
|
|
|
* loadinfo - Load state information
|
|
|
|
* shdr - Symbol table section header
|
|
|
|
* sym - Symbol table entry
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
|
|
* failure.
|
|
|
|
*
|
|
|
|
* EINVAL - There is something inconsistent in the symbol table
|
|
|
|
* (should only happen if the file is corrupted).
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
int modlib_insertsymtab(FAR struct module_s *modp,
|
|
|
|
struct mod_loadinfo_s *loadinfo,
|
|
|
|
FAR Elf_Shdr *shdr, FAR Elf_Sym *sym)
|
|
|
|
{
|
|
|
|
FAR struct symtab_s *symbol;
|
2023-07-09 00:16:11 +02:00
|
|
|
FAR Elf_Shdr *strtab = &loadinfo->shdr[shdr->sh_link];
|
2022-09-26 08:22:03 +02:00
|
|
|
int ret = 0;
|
|
|
|
int i;
|
|
|
|
int j;
|
2023-07-09 00:16:11 +02:00
|
|
|
int nsym;
|
|
|
|
int symcount;
|
2022-09-26 08:22:03 +02:00
|
|
|
|
|
|
|
if (modp->modinfo.exports != NULL)
|
|
|
|
{
|
|
|
|
bwarn("Module export information already present - replacing");
|
2023-08-08 00:39:53 +02:00
|
|
|
modlib_freesymtab((FAR void *)modp);
|
2022-09-26 08:22:03 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Count the "live" symbols */
|
|
|
|
|
2023-07-09 00:16:11 +02:00
|
|
|
nsym = shdr->sh_size / sizeof(Elf_Sym);
|
|
|
|
for (i = 0, symcount = 0; i < nsym; i++)
|
2022-09-26 08:22:03 +02:00
|
|
|
{
|
|
|
|
if (sym[i].st_name != 0)
|
2023-07-09 00:16:11 +02:00
|
|
|
symcount++;
|
2022-09-26 08:22:03 +02:00
|
|
|
}
|
|
|
|
|
2023-07-09 00:16:11 +02:00
|
|
|
if (symcount > 0)
|
2022-09-26 08:22:03 +02:00
|
|
|
{
|
|
|
|
modp->modinfo.exports = symbol =
|
|
|
|
loadinfo->exported =
|
2023-07-09 00:16:11 +02:00
|
|
|
lib_malloc(sizeof(*symbol) * symcount);
|
2022-09-26 08:22:03 +02:00
|
|
|
if (modp->modinfo.exports)
|
|
|
|
{
|
|
|
|
/* Build out module's symbol table */
|
|
|
|
|
2023-07-09 00:16:11 +02:00
|
|
|
modp->modinfo.nexports = symcount;
|
|
|
|
for (i = 0, j = 0; i < nsym; i++)
|
2022-09-26 08:22:03 +02:00
|
|
|
{
|
|
|
|
if (sym[i].st_name != 0)
|
|
|
|
{
|
2023-07-09 00:16:11 +02:00
|
|
|
ret = modlib_symname(loadinfo, &sym[i], strtab->sh_offset);
|
2022-09-26 08:22:03 +02:00
|
|
|
if (ret < 0)
|
|
|
|
{
|
2023-08-08 00:39:53 +02:00
|
|
|
lib_free((FAR void *)modp->modinfo.exports);
|
2022-09-26 08:22:03 +02:00
|
|
|
modp->modinfo.exports = NULL;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2023-08-08 00:39:53 +02:00
|
|
|
symbol[j].sym_name =
|
|
|
|
strdup((FAR char *)loadinfo->iobuffer);
|
|
|
|
symbol[j].sym_value = (FAR const void *)sym[i].st_value;
|
2022-09-26 08:22:03 +02:00
|
|
|
j++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
berr("Unable to get memory for exported symbols table");
|
|
|
|
ret = -ENOMEM;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
2023-07-09 00:16:11 +02:00
|
|
|
* Name: findep
|
2022-09-26 08:22:03 +02:00
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Binary search comparison function
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* c1 - Comparand 1
|
|
|
|
* c2 - Comparand 2
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2023-07-09 00:16:11 +02:00
|
|
|
static int findep(FAR const void *c1, FAR const void *c2)
|
2022-09-26 08:22:03 +02:00
|
|
|
{
|
2023-07-09 00:16:11 +02:00
|
|
|
FAR const struct eptable_s *m1 = (FAR const struct eptable_s *)c1;
|
|
|
|
FAR const struct eptable_s *m2 = (FAR const struct eptable_s *)c2;
|
|
|
|
return strcmp((FAR const char *)m1->epname, (FAR const char *)m2->epname);
|
2022-09-26 08:22:03 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: modlib_findglobal
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Find a symbol in our library entry point table
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* modp - Module state information
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
void *modlib_findglobal(FAR struct module_s *modp,
|
2023-07-09 00:16:11 +02:00
|
|
|
FAR struct mod_loadinfo_s *loadinfo,
|
2022-09-26 08:22:03 +02:00
|
|
|
FAR Elf_Shdr *shdr, FAR Elf_Sym *sym)
|
|
|
|
{
|
2023-07-09 00:16:11 +02:00
|
|
|
FAR Elf_Shdr *strtab = &loadinfo->shdr[shdr->sh_link];
|
2022-09-26 08:22:03 +02:00
|
|
|
int ret;
|
2023-07-09 00:16:11 +02:00
|
|
|
struct eptable_s key;
|
|
|
|
FAR struct eptable_s *res;
|
2022-09-26 08:22:03 +02:00
|
|
|
|
2023-07-09 00:16:11 +02:00
|
|
|
ret = modlib_symname(loadinfo, sym, strtab->sh_offset);
|
2022-09-26 08:22:03 +02:00
|
|
|
if (ret < 0)
|
2023-07-09 00:16:11 +02:00
|
|
|
{
|
2022-09-26 08:22:03 +02:00
|
|
|
return NULL;
|
2023-07-09 00:16:11 +02:00
|
|
|
}
|
2022-09-26 08:22:03 +02:00
|
|
|
|
2023-07-09 00:16:11 +02:00
|
|
|
key.epname = loadinfo->iobuffer;
|
|
|
|
res = bsearch(&key, global_table, nglobals,
|
|
|
|
sizeof(struct eptable_s), findep);
|
2022-09-26 08:22:03 +02:00
|
|
|
if (res != NULL)
|
|
|
|
{
|
2023-07-09 00:16:11 +02:00
|
|
|
return res->epaddr;
|
2022-09-26 08:22:03 +02:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: modlib_freesymtab
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Free a symbol table
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* modp - Module state information
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
void modlib_freesymtab(FAR struct module_s *modp)
|
|
|
|
{
|
|
|
|
FAR const struct symtab_s *symbol;
|
2023-08-08 00:39:53 +02:00
|
|
|
int i;
|
2022-09-26 08:22:03 +02:00
|
|
|
|
2023-08-08 00:39:53 +02:00
|
|
|
if ((symbol = modp->modinfo.exports) != NULL)
|
2022-09-26 08:22:03 +02:00
|
|
|
{
|
2023-08-08 00:39:53 +02:00
|
|
|
for (i = 0; i < modp->modinfo.nexports; i++)
|
2022-09-26 08:22:03 +02:00
|
|
|
{
|
2023-08-08 00:39:53 +02:00
|
|
|
lib_free((FAR void *)symbol[i].sym_name);
|
2022-09-26 08:22:03 +02:00
|
|
|
}
|
|
|
|
|
2023-08-08 00:39:53 +02:00
|
|
|
lib_free((FAR void *)symbol);
|
2022-09-26 08:22:03 +02:00
|
|
|
}
|
|
|
|
}
|