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/****************************************************************************
* binfmt/libnxflat/libnxflat_init.c
*
* Copyright (C) 2009 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 <sys/stat.h>
#include <stdint.h>
#include <string.h>
#include <fcntl.h>
#include <nxflat.h>
#include <debug.h>
#include <errno.h>
#include <arpa/inet.h>
#include <nuttx/binfmt/nxflat.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* CONFIG_DEBUG, CONFIG_DEBUG_VERBOSE, and CONFIG_DEBUG_BINFMT have to be
* defined or CONFIG_NXFLAT_DUMPBUFFER does nothing.
*/
#if !defined(CONFIG_DEBUG_VERBOSE) || !defined (CONFIG_DEBUG_BINFMT)
# undef CONFIG_NXFLAT_DUMPBUFFER
#endif
#ifdef CONFIG_NXFLAT_DUMPBUFFER
# define nxflat_dumpbuffer(m,b,n) bvdbgdumpbuffer(m,b,n)
#else
# define nxflat_dumpbuffer(m,b,n)
#endif
/****************************************************************************
* Private Constant Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxflat_init
*
* Description:
* This function is called to configure the library to process an NXFLAT
* program binary.
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int nxflat_init(const char *filename, struct nxflat_loadinfo_s *loadinfo)
{
uint32_t datastart;
uint32_t dataend;
uint32_t bssend;
int ret;
bvdbg("filename: %s loadinfo: %p\n", filename, loadinfo);
/* Clear the load info structure */
memset(loadinfo, 0, sizeof(struct nxflat_loadinfo_s));
/* Open the binary file */
loadinfo->filfd = open(filename, O_RDONLY);
if (loadinfo->filfd < 0)
{
int errval = errno;
bdbg("Failed to open NXFLAT binary %s: %d\n", filename, errval);
return -errval;
}
/* Read the NXFLAT header from offset 0 */
ret = nxflat_read(loadinfo, (char*)&loadinfo->header,
sizeof(struct nxflat_hdr_s), 0);
if (ret < 0)
{
bdbg("Failed to read NXFLAT header: %d\n", ret);
return ret;
}
nxflat_dumpbuffer("NXFLAT header", (FAR const uint8_t*)&loadinfo->header,
sizeof(struct nxflat_hdr_s));
/* Verify the NXFLAT header */
if (nxflat_verifyheader(&loadinfo->header) != 0)
{
/* This is not an error because we will be called to attempt loading
* EVERY binary. Returning -ENOEXEC simply informs the system that
* the file is not an NXFLAT file. Besides, if there is something worth
* complaining about, nnxflat_verifyheader() has already
* done so.
*/
bdbg("Bad NXFLAT header\n");
return -ENOEXEC;
}
/* Save all of the input values in the loadinfo structure
* and extract some additional information from the xflat
* header. Note that the information in the xflat header is in
* network order.
*/
datastart = ntohl(loadinfo->header.h_datastart);
dataend = ntohl(loadinfo->header.h_dataend);
bssend = ntohl(loadinfo->header.h_bssend);
/* And put this information into the loadinfo structure as well.
*
* Note that:
*
* isize = the address range from 0 up to datastart.
* datasize = the address range from datastart up to dataend
* bsssize = the address range from dataend up to bssend.
*/
loadinfo->entryoffs = ntohl(loadinfo->header.h_entry);
loadinfo->isize = datastart;
loadinfo->datasize = dataend - datastart;
loadinfo->bsssize = bssend - dataend;
loadinfo->stacksize = ntohl(loadinfo->header.h_stacksize);
/* This is the initial dspace size. We'll re-calculate this later
* after the memory has been allocated.
*/
loadinfo->dsize = bssend - datastart;
/* Get the offset to the start of the relocations (we'll relocate
* this later).
*/
loadinfo->relocstart = ntohl(loadinfo->header.h_relocstart);
loadinfo->reloccount = ntohs(loadinfo->header.h_reloccount);
return 0;
}
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