lexsup.c

来自「基于4个mips核的noc设计」· C语言 代码 · 共 1,283 行 · 第 1/3 页

	      sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
	      free (command_line.rpath_link);
	      command_line.rpath_link = buf;
	    }
	  break;
	case OPTION_RELAX:
	  command_line.relax = true;
	  break;
	case OPTION_RETAIN_SYMBOLS_FILE:
	  add_keepsyms_file (optarg);
	  break;
	case 'S':
	  link_info.strip = strip_debugger;
	  break;
	case 's':
	  link_info.strip = strip_all;
	  break;
	case OPTION_SHARED:
	  if (config.has_shared)
	    link_info.shared = true;
	  else
	    einfo (_("%P%F: -shared not supported\n"));
	  break;
	case 'h':		/* Used on Solaris.  */
	case OPTION_SONAME:
	  command_line.soname = optarg;
	  break;
	case OPTION_SORT_COMMON:
	  config.sort_common = true;
	  break;
	case OPTION_STATS:
	  config.stats = true;
	  break;
	case OPTION_SYMBOLIC:
	  link_info.symbolic = true;
	  break;
	case 't':
	  trace_files = true;
	  break;
	case 'T':
	  ldfile_open_command_file (optarg);
	  parser_input = input_script;
	  yyparse ();
	  break;
	case OPTION_SECTION_START:
	  {
	    char *optarg2;
	    char *sec_name;
	    int len;

	    /* Check for <something>=<somthing>...  */
	    optarg2 = strchr (optarg, '=');
	    if (optarg2 == NULL)
	      {
		fprintf (stderr,
			 _("%s: Invalid argument to option \"--section-start\"\n"),
			 program_name);
		xexit (1);
	      }

	    optarg2++;

	    /* So far so good.  Are all the args present?  */
	    if ((*optarg == '\0') || (*optarg2 == '\0'))
	      {
		fprintf (stderr,
			 _("%s: Missing argument(s) to option \"--section-start\"\n"),
			 program_name);
		xexit (1);
	      }

	    /* We must copy the section name as set_section_start
	       doesn't do it for us.  */
	    len = optarg2 - optarg;
	    sec_name = xmalloc (len);
	    memcpy (sec_name, optarg, len - 1);
	    sec_name[len - 1] = 0;

	    /* Then set it...  */
	    set_section_start (sec_name, optarg2);
	  }
	  break;
	case OPTION_TARGET_HELP:
	  /* Mention any target specific options.  */
          ldemul_list_emulation_options (stdout);
          exit (0);
	case OPTION_TBSS:
	  set_section_start (".bss", optarg);
	  break;
	case OPTION_TDATA:
	  set_section_start (".data", optarg);
	  break;
	case OPTION_TTEXT:
	  set_section_start (".text", optarg);
	  break;
	case OPTION_TRADITIONAL_FORMAT:
	  link_info.traditional_format = true;
	  break;
	case OPTION_TASK_LINK:
	  link_info.task_link = true;
	  /* Fall through - do an implied -r option.  */
	case OPTION_UR:
	  link_info.relocateable = true;
	  config.build_constructors = true;
	  config.magic_demand_paged = false;
	  config.text_read_only = false;
	  config.dynamic_link = false;
	  break;
	case 'u':
	  ldlang_add_undef (optarg);
	  break;
	case OPTION_UNIQUE:
	  if (optarg != NULL)
	    lang_add_unique (optarg);
	  else
	    config.unique_orphan_sections = true;
	  break;
	case OPTION_VERBOSE:
	  ldversion (1);
	  version_printed = true;
	  trace_file_tries = true;
	  break;
	case 'v':
	  ldversion (0);
	  version_printed = true;
	  break;
	case 'V':
	  ldversion (1);
	  version_printed = true;
	  break;
	case OPTION_VERSION:
	  /* This output is intended to follow the GNU standards document.  */
	  printf ("GNU ld %s\n", ld_program_version);
	  printf (_("Copyright 2001 Free Software Foundation, Inc.\n"));
	  printf (_("\
This program is free software; you may redistribute it under the terms of\n\
the GNU General Public License.  This program has absolutely no warranty.\n"));
	  {
	    ld_emulation_xfer_type **ptr = ld_emulations;

	    printf (_("  Supported emulations:\n"));
	    while (*ptr)
	      {
		printf ("   %s\n", (*ptr)->emulation_name);
		ptr++;
	      }
	  }
	  xexit (0);
	  break;
	case OPTION_VERSION_SCRIPT:
	  /* This option indicates a small script that only specifies
             version information.  Read it, but don't assume that
             we've seen a linker script.  */
	  {
	    boolean hold_had_script;

	    hold_had_script = had_script;
	    ldfile_open_command_file (optarg);
	    had_script = hold_had_script;
	    parser_input = input_version_script;
	    yyparse ();
	  }
	  break;
	case OPTION_VERSION_EXPORTS_SECTION:
	  /* This option records a version symbol to be applied to the
	     symbols listed for export to be found in the object files
	     .exports sections.  */
	  command_line.version_exports_section = optarg;
	  break;
	case OPTION_WARN_COMMON:
	  config.warn_common = true;
	  break;
	case OPTION_WARN_CONSTRUCTORS:
	  config.warn_constructors = true;
	  break;
	case OPTION_WARN_MULTIPLE_GP:
	  config.warn_multiple_gp = true;
	  break;
	case OPTION_WARN_ONCE:
	  config.warn_once = true;
	  break;
	case OPTION_WARN_SECTION_ALIGN:
	  config.warn_section_align = true;
	  break;
	case OPTION_WHOLE_ARCHIVE:
	  whole_archive = true;
	  break;
	case OPTION_WRAP:
	  add_wrap (optarg);
	  break;
	case 'X':
	  link_info.discard = discard_l;
	  break;
	case 'x':
	  link_info.discard = discard_all;
	  break;
	case 'Y':
	  if (strncmp (optarg, "P,", 2) == 0)
	    optarg += 2;
	  default_dirlist = xstrdup (optarg);
	  break;
	case 'y':
	  add_ysym (optarg);
	  break;
	case OPTION_SPLIT_BY_RELOC:
	  if (optarg != NULL)
	    config.split_by_reloc = strtoul (optarg, NULL, 0);
	  else
	    config.split_by_reloc = 32768;
	  break;
	case OPTION_SPLIT_BY_FILE:
	  if (optarg != NULL)
	    config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
	  else
	    config.split_by_file = 1;
	  break;
	case OPTION_CHECK_SECTIONS:
	  command_line.check_section_addresses = true;
	  break;
	case OPTION_NO_CHECK_SECTIONS:
	  command_line.check_section_addresses = false;
	  break;
	case '(':
	  if (ingroup)
	    {
	      fprintf (stderr,
		       _("%s: may not nest groups (--help for usage)\n"),
		       program_name);
	      xexit (1);
	    }
	  lang_enter_group ();
	  ingroup = 1;
	  break;
	case ')':
	  if (! ingroup)
	    {
	      fprintf (stderr,
		       _("%s: group ended before it began (--help for usage)\n"),
		       program_name);
	      xexit (1);
	    }
	  lang_leave_group ();
	  ingroup = 0;
	  break;
	case OPTION_MPC860C0:
	  link_info.mpc860c0 = 20;      /* default value (in bytes) */
	  if (optarg)
	    {
	      unsigned words;

	      words = is_num (optarg, 1, 10, 0);
	      if (words == 0)
		{
		  fprintf (stderr,
			   _("%s: Invalid argument to option \"mpc860c0\"\n"),
			   program_name);
		  xexit (1);
		}
	      link_info.mpc860c0 = words * 4;	/* convert words to bytes */
	    }
	  command_line.relax = true;
	  break;

	case OPTION_INIT:
	  link_info.init_function = optarg;
	  break;

	case OPTION_FINI:
	  link_info.fini_function = optarg;
	  break;
	}
    }

  if (ingroup)
    lang_leave_group ();

  if (default_dirlist != NULL)
    set_default_dirlist (default_dirlist);

}

/* Add the (colon-separated) elements of DIRLIST_PTR to the
   library search path.  */

static void
set_default_dirlist (dirlist_ptr)
     char *dirlist_ptr;
{
  char *p;

  while (1)
    {
      p = strchr (dirlist_ptr, PATH_SEPARATOR);
      if (p != NULL)
	*p = '\0';
      if (*dirlist_ptr != '\0')
	ldfile_add_library_path (dirlist_ptr, true);
      if (p == NULL)
	break;
      dirlist_ptr = p + 1;
    }
}

static void
set_section_start (sect, valstr)
     char *sect, *valstr;
{
  const char *end;
  bfd_vma val = bfd_scan_vma (valstr, &end, 16);
  if (*end)
    einfo (_("%P%F: invalid hex number `%s'\n"), valstr);
  lang_section_start (sect, exp_intop (val));
}

/* Print help messages for the options.  */

static void
help ()
{
  unsigned i;
  const char **targets, **pp;

  printf (_("Usage: %s [options] file...\n"), program_name);

  printf (_("Options:\n"));
  for (i = 0; i < OPTION_COUNT; i++)
    {
      if (ld_options[i].doc != NULL)
	{
	  boolean comma;
	  int len;
	  unsigned j;

	  printf ("  ");

	  comma = false;
	  len = 2;

	  j = i;
	  do
	    {
	      if (ld_options[j].shortopt != '\0'
		  && ld_options[j].control != NO_HELP)
		{
		  printf ("%s-%c", comma ? ", " : "", ld_options[j].shortopt);
		  len += (comma ? 2 : 0) + 2;
		  if (ld_options[j].arg != NULL)
		    {
		      if (ld_options[j].opt.has_arg != optional_argument)
			{
			  printf (" ");
			  ++len;
			}
		      printf ("%s", _(ld_options[j].arg));
		      len += strlen (_(ld_options[j].arg));
		    }
		  comma = true;
		}
	      ++j;
	    }
	  while (j < OPTION_COUNT && ld_options[j].doc == NULL);

	  j = i;
	  do
	    {
	      if (ld_options[j].opt.name != NULL
		  && ld_options[j].control != NO_HELP)
		{
		  int two_dashes =
		    (ld_options[j].control == TWO_DASHES
		     || ld_options[j].control == EXACTLY_TWO_DASHES);
		  
		  printf ("%s-%s%s",
			  comma ? ", " : "",
			  two_dashes ? "-" : "",
			  ld_options[j].opt.name);
		  len += ((comma ? 2 : 0)
			  + 1
			  + (two_dashes ? 1 : 0)
			  + strlen (ld_options[j].opt.name));
		  if (ld_options[j].arg != NULL)
		    {
		      printf (" %s", _(ld_options[j].arg));
		      len += 1 + strlen (_(ld_options[j].arg));
		    }
		  comma = true;
		}
	      ++j;
	    }
	  while (j < OPTION_COUNT && ld_options[j].doc == NULL);

	  if (len >= 30)
	    {
	      printf ("\n");
	      len = 0;
	    }

	  for (; len < 30; len++)
	    putchar (' ');

	  printf ("%s\n", _(ld_options[i].doc));
	}
    }

  /* Note: Various tools (such as libtool) depend upon the
     format of the listings below - do not change them.  */
  /* xgettext:c-format */
  printf (_("%s: supported targets:"), program_name);
  targets = bfd_target_list ();
  for (pp = targets; *pp != NULL; pp++)
    printf (" %s", *pp);
  free (targets);
  printf ("\n");

  /* xgettext:c-format */
  printf (_("%s: supported emulations: "), program_name);
  ldemul_list_emulations (stdout);
  printf ("\n");

  /* xgettext:c-format */
  printf (_("%s: emulation specific options:\n"), program_name);
  ldemul_list_emulation_options (stdout);
  printf ("\n");

  printf (_("Report bugs to %s\n"), REPORT_BUGS_TO);
}