static void mod_dumpinitializer(mod_initializer_t initializer,
FAR struct mod_loadinfo_s *loadinfo)
{
mod_dumpbuffer("Initializer code", (FAR const uint8_t *)initializer,
MIN(loadinfo->textsize - loadinfo->ehdr.e_entry, 512));
}
int mod_initialize(FAR const char *filename,
FAR struct mod_loadinfo_s *loadinfo)
{
int ret;
svdbg("filename: %s loadinfo: %p\n", filename, loadinfo);
/* Clear the load info structure */
memset(loadinfo, 0, sizeof(struct mod_loadinfo_s));
/* Get the length of the file. */
ret = mod_filelen(loadinfo, filename);
if (ret < 0)
{
sdbg("mod_filelen failed: %d\n", ret);
return ret;
}
/* Open the binary file for reading (only) */
loadinfo->filfd = open(filename, O_RDONLY);
if (loadinfo->filfd < 0)
{
int errval = errno;
sdbg("Failed to open ELF binary %s: %d\n", filename, errval);
return -errval;
}
/* Read the ELF ehdr from offset 0 */
ret = mod_read(loadinfo, (FAR uint8_t *)&loadinfo->ehdr,
sizeof(Elf32_Ehdr), 0);
if (ret < 0)
{
sdbg("Failed to read ELF header: %d\n", ret);
return ret;
}
mod_dumpbuffer("ELF header", (FAR const uint8_t *)&loadinfo->ehdr,
sizeof(Elf32_Ehdr));
/* Verify the ELF header */
ret = mod_verifyheader(&loadinfo->ehdr);
if (ret < 0)
{
/* This may not be an error because we will be called to attempt loading
* EVERY binary. If mod_verifyheader() does not recognize the ELF header,
* it will -ENOEXEC whcih simply informs the system that the file is not an
* ELF file. mod_verifyheader() will return other errors if the ELF header
* is not correctly formed.
*/
sdbg("Bad ELF header: %d\n", ret);
return ret;
}
return OK;
}
