b5cd7c2a82
* build-globals.sh
- Macros for defining symbols etc. based on assembler in use
- Use the System.map to get all the nuttx symbols
* libs/libc/modlib/modlib_globals.S
- Provide an empty skeleton. If the dynamic loading functions
are required then run build-global.sh after a clean build
using the skeleton. This will fill out the skeleton with the
symbols to be available to dynamically loaded modules.
* libs/libc/modlib/modlib_loadhdrs.c
- Fix case where there are no program headers are avaiable
102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/****************************************************************************
|
|
* libs/libc/modlib/modlib_verify.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 <string.h>
|
|
#include <debug.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/elf.h>
|
|
#include <nuttx/lib/modlib.h>
|
|
|
|
/****************************************************************************
|
|
* Private Constant Data
|
|
****************************************************************************/
|
|
|
|
static const char g_modmagic[EI_MAGIC_SIZE] = EI_MAGIC;
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: modlib_verifyheader
|
|
*
|
|
* Description:
|
|
* Given the header from a possible ELF executable, verify that it
|
|
* is an ELF executable.
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
* -ENOEXEC : Not an ELF file
|
|
* -EINVAL : Not a relocatable ELF file or not supported by the current,
|
|
* configured architecture.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int modlib_verifyheader(FAR const Elf_Ehdr *ehdr)
|
|
{
|
|
if (!ehdr)
|
|
{
|
|
berr("ERROR: NULL ELF header!");
|
|
return -ENOEXEC;
|
|
}
|
|
|
|
/* Verify that the magic number indicates an ELF file */
|
|
|
|
if (memcmp(ehdr->e_ident, g_modmagic, EI_MAGIC_SIZE) != 0)
|
|
{
|
|
binfo("Not ELF magic {%02x, %02x, %02x, %02x}\n",
|
|
ehdr->e_ident[0], ehdr->e_ident[1], ehdr->e_ident[2],
|
|
ehdr->e_ident[3]);
|
|
return -ENOEXEC;
|
|
}
|
|
|
|
/* Verify that this is a relocatable file */
|
|
|
|
if (ehdr->e_type != ET_REL)
|
|
{
|
|
if (ehdr->e_type != ET_DYN)
|
|
{
|
|
berr("ERROR: Not a relocatable file: e_type=%d\n", ehdr->e_type);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* Verify that this file works with the currently configured architecture */
|
|
|
|
if (!up_checkarch(ehdr))
|
|
{
|
|
berr("ERROR: Not a supported architecture\n");
|
|
return -ENOEXEC;
|
|
}
|
|
|
|
/* Looks good so far... we still might find some problems later. */
|
|
|
|
return OK;
|
|
}
|