Esempio n. 1
0
static void elf_dumpentrypt(FAR struct binary_s *binp,
                            FAR struct elf_loadinfo_s *loadinfo)
{
#ifdef CONFIG_ARCH_ADDRENV
  int ret;

  /* If CONFIG_ARCH_ADDRENV=y, then the loaded ELF lies in a virtual address
   * space that may not be in place now.  elf_addrenv_select() will
   * temporarily instantiate that address space.
   */

  ret = elf_addrenv_select(loadinfo);
  if (ret < 0)
    {
      bdbg("ERROR: elf_addrenv_select() failed: %d\n", ret);
      return;
    }
#endif

  elf_dumpbuffer("Entry code", (FAR const uint8_t *)binp->entrypt,
                 MIN(loadinfo->textsize - loadinfo->ehdr.e_entry, 512));

#ifdef CONFIG_ARCH_ADDRENV
  /* Restore the original address environment */

  ret = elf_addrenv_restore(loadinfo);
  if (ret < 0)
    {
      bdbg("ERROR: elf_addrenv_restore() failed: %d\n", ret);
    }
#endif
}
Esempio n. 2
0
static int elf_loadbinary(struct binary_s *binp)
{
  struct elf_loadinfo_s loadinfo;  /* Contains globals for libelf */
  int                   ret;

  bvdbg("Loading file: %s\n", binp->filename);

  /* Initialize the xflat library to load the program binary. */

  ret = elf_init(binp->filename, &loadinfo);
  elf_dumploadinfo(&loadinfo);
  if (ret != 0)
    {
      bdbg("Failed to initialize for load of ELF program: %d\n", ret);
      goto errout;
    }

  /* Load the program binary */

  ret = elf_load(&loadinfo);
  elf_dumploadinfo(&loadinfo);
  if (ret != 0)
    {
      bdbg("Failed to load ELF program binary: %d\n", ret);
      goto errout_with_init;
    }

  /* Bind the program to the exported symbol table */

  ret = elf_bind(&loadinfo, binp->exports, binp->nexports);
  if (ret != 0)
    {
      bdbg("Failed to bind symbols program binary: %d\n", ret);
      goto errout_with_load;
    }

  /* Return the load information */

  binp->entrypt   = (main_t)(loadinfo.elfalloc + loadinfo.ehdr.e_entry);
  binp->alloc[0]  = (FAR void *)loadinfo.elfalloc;
  binp->stacksize = CONFIG_ELF_STACKSIZE;

#ifdef CONFIG_BINFMT_CONSTRUCTORS
  /* Save information about constructors.  NOTE:  desctructors are not
   * yet supported.
   */

  binp->alloc[1]  = loadinfo.ctoralloc;
  binp->ctors     = loadinfo.ctors;
  binp->nctors    = loadinfo.nctors;

  binp->alloc[2]  = loadinfo.dtoralloc;
  binp->dtors     = loadinfo.dtors;
  binp->ndtors    = loadinfo.ndtors;
#endif

  elf_dumpbuffer("Entry code", (FAR const uint8_t*)binp->entrypt,
                 MIN(loadinfo.allocsize - loadinfo.ehdr.e_entry, 512));

  elf_uninit(&loadinfo);
  return OK;

errout_with_load:
  elf_unload(&loadinfo);
errout_with_init:
  elf_uninit(&loadinfo);
errout:
  return ret;
}
Esempio n. 3
0
static int elf_loadbinary(struct binary_s *binp)
{
  struct elf_loadinfo_s loadinfo;  /* Contains globals for libelf */
  int                   ret;

  bvdbg("Loading file: %s\n", binp->filename);

  /* Initialize the ELF library to load the program binary. */

  ret = elf_init(binp->filename, &loadinfo);
  elf_dumploadinfo(&loadinfo);
  if (ret != 0)
    {
      bdbg("Failed to initialize for load of ELF program: %d\n", ret);
      goto errout;
    }

  /* Load the program binary */

  ret = elf_load(&loadinfo);
  elf_dumploadinfo(&loadinfo);
  if (ret != 0)
    {
      bdbg("Failed to load ELF program binary: %d\n", ret);
      goto errout_with_init;
    }

  /* Bind the program to the exported symbol table */

  ret = elf_bind(&loadinfo, binp->exports, binp->nexports);
  if (ret != 0)
    {
      bdbg("Failed to bind symbols program binary: %d\n", ret);
      goto errout_with_load;
    }

  /* Return the load information */

  binp->entrypt   = (main_t)(loadinfo.elfalloc + loadinfo.ehdr.e_entry);
  binp->stacksize = CONFIG_ELF_STACKSIZE;

  /* Add the ELF allocation to the alloc[] only if there is no address
   * enironment.  If there is an address environment, it will automatically
   * be freed when the function exits
   *
   * REVISIT:  If the module is loaded then unloaded, wouldn't this cause
   * a memory leak?
   */

#ifdef CONFIG_ADDRENV
#  warning "REVISIT"
#else
  binp->alloc[0]  = (FAR void *)loadinfo.elfalloc;
#endif

#ifdef CONFIG_BINFMT_CONSTRUCTORS
  /* Save information about constructors.  NOTE:  desctructors are not
   * yet supported.
   */

  binp->alloc[1]  = loadinfo.ctoralloc;
  binp->ctors     = loadinfo.ctors;
  binp->nctors    = loadinfo.nctors;

  binp->alloc[2]  = loadinfo.dtoralloc;
  binp->dtors     = loadinfo.dtors;
  binp->ndtors    = loadinfo.ndtors;
#endif

#ifdef CONFIG_ADDRENV
  /* Save the address environment.  This will be needed when the module is
   * executed for the up_addrenv_assign() call.
   */

  binp->addrenv   = loadinfo.addrenv;
#endif

  elf_dumpbuffer("Entry code", (FAR const uint8_t*)binp->entrypt,
                 MIN(loadinfo.allocsize - loadinfo.ehdr.e_entry, 512));

  elf_uninit(&loadinfo);
  return OK;

errout_with_load:
  elf_unload(&loadinfo);
errout_with_init:
  elf_uninit(&loadinfo);
errout:
  return ret;
}