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Diffstat (limited to 'nuttx/binfmt/libelf/libelf_symbols.c')
-rw-r--r--nuttx/binfmt/libelf/libelf_symbols.c329
1 files changed, 0 insertions, 329 deletions
diff --git a/nuttx/binfmt/libelf/libelf_symbols.c b/nuttx/binfmt/libelf/libelf_symbols.c
deleted file mode 100644
index 2d94b11af..000000000
--- a/nuttx/binfmt/libelf/libelf_symbols.c
+++ /dev/null
@@ -1,329 +0,0 @@
-/****************************************************************************
- * binfmt/libelf/libelf_symbols.c
- *
- * Copyright (C) 2012 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
-
-/****************************************************************************
- * Included Files
- ****************************************************************************/
-
-#include <nuttx/config.h>
-
-#include <stdlib.h>
-#include <string.h>
-#include <elf32.h>
-#include <errno.h>
-#include <debug.h>
-
-#include <nuttx/binfmt/elf.h>
-#include <nuttx/binfmt/symtab.h>
-
-#include "libelf.h"
-
-/****************************************************************************
- * Pre-Processor Definitions
- ****************************************************************************/
-
-#ifndef CONFIG_ELF_BUFFERINCR
-# define CONFIG_ELF_BUFFERINCR 32
-#endif
-
-/****************************************************************************
- * Private Constant Data
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: elf_symname
- *
- * Description:
- * Get the symbol name in loadinfo->iobuffer[].
- *
- * Returned Value:
- * 0 (OK) is returned on success and a negated errno is returned on
- * failure.
- *
- ****************************************************************************/
-
-static int elf_symname(FAR struct elf_loadinfo_s *loadinfo,
- FAR const Elf32_Sym *sym)
-{
- FAR uint8_t *buffer;
- off_t offset;
- size_t readlen;
- size_t bytesread;
- int ret;
-
- /* Get the file offset to the string that is the name of the symbol. The
- * st_name member holds an offset into the file's symbol string table.
- */
-
- if (sym->st_name == 0)
- {
- bdbg("Symbol has no name\n");
- return -ENOENT;
- }
-
- offset = loadinfo->shdr[loadinfo->strtabidx].sh_offset + sym->st_name;
-
- /* Loop until we get the entire symbol name into memory */
-
- bytesread = 0;
-
- for (;;)
- {
- /* Get the number of bytes to read */
-
- readlen = loadinfo->buflen - bytesread;
- if (offset + readlen > loadinfo->filelen)
- {
- readlen = loadinfo->filelen - offset;
- if (readlen <= 0)
- {
- bdbg("At end of file\n");
- return -EINVAL;
- }
- }
-
- /* Read that number of bytes into the array */
-
- buffer = &loadinfo->iobuffer[bytesread];
- ret = elf_read(loadinfo, buffer, readlen, offset);
- if (ret < 0)
- {
- bdbg("elf_read failed: %d\n", ret);
- return ret;
- }
-
- bytesread += readlen;
-
- /* Did we read the NUL terminator? */
-
- if (memchr(buffer, '\0', readlen) != NULL)
- {
- /* Yes, the buffer contains a NUL terminator. */
-
- return OK;
- }
-
- /* No.. then we have to read more */
-
- ret = elf_reallocbuffer(loadinfo, CONFIG_ELF_BUFFERINCR);
- if (ret < 0)
- {
- bdbg("elf_reallocbuffer failed: %d\n", ret);
- return ret;
- }
- }
-
- /* We will not get here */
-
- return OK;
-}
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: elf_findsymtab
- *
- * Description:
- * Find the symbol table section.
- *
- * Returned Value:
- * 0 (OK) is returned on success and a negated errno is returned on
- * failure.
- *
- ****************************************************************************/
-
-int elf_findsymtab(FAR struct elf_loadinfo_s *loadinfo)
-{
- int i;
-
- /* Find the symbol table section header and its associated string table */
-
- for (i = 1; i < loadinfo->ehdr.e_shnum; i++)
- {
- if (loadinfo->shdr[i].sh_type == SHT_SYMTAB)
- {
- loadinfo->symtabidx = i;
- loadinfo->strtabidx = loadinfo->shdr[i].sh_link;
- break;
- }
- }
-
- /* Verify that there is a symbol and string table */
-
- if (loadinfo->symtabidx == 0)
- {
- bdbg("No symbols in ELF file\n");
- return -EINVAL;
- }
-
- return OK;
-}
-
-/****************************************************************************
- * Name: elf_readsym
- *
- * Description:
- * Read the ELFT symbol structure at the specfied index into memory.
- *
- * 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.
- *
- ****************************************************************************/
-
-int elf_readsym(FAR struct elf_loadinfo_s *loadinfo, int index,
- FAR Elf32_Sym *sym)
-{
- FAR Elf32_Shdr *symtab = &loadinfo->shdr[loadinfo->symtabidx];
- off_t offset;
-
- /* Verify that the symbol table index lies within symbol table */
-
- if (index < 0 || index > (symtab->sh_size / sizeof(Elf32_Sym)))
- {
- bdbg("Bad relocation symbol index: %d\n", index);
- return -EINVAL;
- }
-
- /* Get the file offset to the symbol table entry */
-
- offset = symtab->sh_offset + sizeof(Elf32_Sym) * index;
-
- /* And, finally, read the symbol table entry into memory */
-
- return elf_read(loadinfo, (FAR uint8_t*)sym, sizeof(Elf32_Sym), offset);
-}
-
-/****************************************************************************
- * Name: elf_symvalue
- *
- * 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:
- * loadinfo - Load state information
- * sym - Symbol table entry (value might be undefined)
- *
- * Returned Value:
- * 0 (OK) is returned on success and a negated errno is returned on
- * failure.
- *
- ****************************************************************************/
-
-int elf_symvalue(FAR struct elf_loadinfo_s *loadinfo, FAR Elf32_Sym *sym,
- FAR const struct symtab_s *exports, int nexports)
-{
- FAR const struct symtab_s *symbol;
- uintptr_t secbase;
- int ret;
-
- switch (sym->st_shndx)
- {
- case SHN_COMMON:
- {
- /* NuttX ELF modules should be compiled with -fno-common. */
-
- bdbg("SHN_COMMON: Re-compile with -fno-common\n");
- return -EINVAL;
- }
-
- case SHN_ABS:
- {
- /* st_value already holds the correct value */
-
- bvdbg("SHN_ABS: st_value=%08lx\n", (long)sym->st_value);
- return OK;
- }
-
- case SHN_UNDEF:
- {
- /* Get the name of the undefined symbol */
-
- ret = elf_symname(loadinfo, sym);
- if (ret < 0)
- {
- bdbg("SHN_UNDEF: Failed to get symbol name: %d\n", ret);
- return ret;
- }
-
- /* Check if the base code exports a symbol of this name */
-
-#ifdef CONFIG_SYMTAB_ORDEREDBYNAME
- symbol = symtab_findorderedbyname(exports, (FAR char *)loadinfo->iobuffer, nexports);
-#else
- symbol = symtab_findbyname(exports, (FAR char *)loadinfo->iobuffer, nexports);
-#endif
- if (!symbol)
- {
- bdbg("SHN_UNDEF: Exported symbol \"%s\" not found\n", loadinfo->iobuffer);
- return -ENOENT;
- }
-
- /* Yes... add the exported symbol value to the ELF symbol table entry */
-
- bvdbg("SHN_ABS: name=%s %08x+%08x=%08x\n",
- loadinfo->iobuffer, sym->st_value, symbol->sym_value,
- sym->st_value + symbol->sym_value);
-
- sym->st_value += (Elf32_Word)((uintptr_t)symbol->sym_value);
- }
- break;
-
- default:
- {
- secbase = loadinfo->shdr[sym->st_shndx].sh_addr;
-
- bvdbg("Other: %08x+%08x=%08x\n",
- sym->st_value, secbase, sym->st_value + secbase);
-
- sym->st_value += secbase;
- }
- break;
- }
-
- return OK;
-}
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