diff options
Diffstat (limited to 'nuttx/binfmt/libnxflat/libnxflat_init.c')
| -rw-r--r-- | nuttx/binfmt/libnxflat/libnxflat_init.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/nuttx/binfmt/libnxflat/libnxflat_init.c b/nuttx/binfmt/libnxflat/libnxflat_init.c new file mode 100644 index 000000000..45f016e27 --- /dev/null +++ b/nuttx/binfmt/libnxflat/libnxflat_init.c @@ -0,0 +1,188 @@ +/**************************************************************************** + * binfmt/libnxflat/libnxflat_init.c + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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/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 bssstart; + 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) + { + bdbg("Failed to open NXFLAT binary %s: %d\n", filename, ret); + return -errno; + } + + /* 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); + bssstart = 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; +} + |