Initial revision

From-SVN: r287

gcc/collect2.c

+/* Collect static initialization info into data structures
+   that can be traversed by C++ initialization and finalization
+   routines.
+
+   Copyright (C) 1992 Free Software Foundation, Inc.
+   Contributed by Chris Smith (csmith@convex.com).
+   Heavily modified by Michael Meissner (meissner@osf.org),
+   Per Bothner (bothner@cygnus.com), and John Gilmore (gnu@cygnus.com).
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+/* Build tables of static constructors and destructors and run ld. */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include "gstddef.h"
+#include <errno.h>
+#include <signal.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#define COLLECT
+
+#include "config.h"
+
+#ifndef __STDC__
+#include "gvarargs.h"
+#define generic char
+#define PROTO(x) ()
+#define const
+
+#else
+#include "stdarg.h"
+#define generic void
+#define PROTO(x) x
+#endif
+
+#ifdef OBJECT_FORMAT_ROSE
+
+#ifdef _OSF_SOURCE
+#define USE_MMAP
+#endif
+
+#ifdef USE_MMAP
+#include <sys/mman.h>
+#endif
+
+#include <unistd.h>
+#include <mach_o_format.h>
+#include <mach_o_header.h>
+#include <mach_o_vals.h>
+#include <mach_o_types.h>
+#endif /* OBJECT_FORMAT_ROSE */
+
+/* Default flags to pass to nm.  */
+#ifndef NM_FLAGS
+#define NM_FLAGS "-p"
+#endif
+
+#ifdef USG
+#define vfork fork
+#endif
+
+/* On MSDOS, write temp files in current dir
+   because there's no place else we can expect to use.  */
+#if __MSDOS__
+#ifndef P_tmpdir
+#define P_tmpdir "./"
+#endif
+#endif
+
+
+/* Linked lists of constructor and destructor names. */
+
+struct id 
+{
+  struct id *next;
+  int sequence;
+  char name[1];
+};
+
+struct head
+{
+  struct id *first;
+  struct id *last;
+  int number;
+};
+
+/* Enumeration giving which pass this is for scanning the program file.  */
+
+enum pass {
+  PASS_FIRST,				/* without constructors */
+  PASS_SECOND				/* with constructors linked in */
+};
+
+extern char *sys_siglist[];
+extern char *version_string;
+
+static int vflag;			/* true if -v */
+static int rflag;			/* true if -r */
+
+static int debug;			/* true if -debug */
+
+static int   temp_filename_length;	/* Length of temp_filename */
+static char *temp_filename;		/* Base of temp filenames */
+static char *c_file;			/* <xxx>.c for constructor/destructor list. */
+static char *o_file;			/* <xxx>.o for constructor/destructor list. */
+static char *nm_file_name;		/* pathname of nm */
+
+static struct head constructors;	/* list of constructors found */
+static struct head destructors;		/* list of destructors found */
+
+extern char *getenv		PROTO((	const char * ));
+extern char *mktemp		PROTO((	char * ));
+extern int   vfork		PROTO(( void ));
+static void  add_to_list	PROTO((	struct head *headp, char *name ));
+static void  scan_prog_file	PROTO((	char *, enum pass ));
+static void  fork_execute	PROTO((	char *, char **argv ));
+static void  do_wait		PROTO((	char * ));
+static void  write_c_file	PROTO((	FILE *, char * ));
+static void  my_exit		PROTO(( int ));
+static void  handler		PROTO(( int ));
+static void  maybe_unlink	PROTO(( char * ));
+static void  choose_temp_base	PROTO(( void ));
+
+generic		*xcalloc	PROTO((	size_t, size_t ));
+generic		*xmalloc	PROTO((	size_t ));
+
+
+
+#if !defined(HAVE_STRERROR) && !defined(_OSF_SOURCE)
+
+char *strerror (e)
+     int e;
+{
+  extern char *sys_errlist[];
+  extern int sys_nerr;
+  static char buffer[30];
+
+  if (!e)
+    return "";
+
+  if (e > 0 && e < sys_nerr)
+    return sys_errlist[e];
+
+  sprintf (buffer, "Unknown error %d", e);
+  return buffer;
+}
+
+#endif
+
+
+/* Delete tempfiles and exit function.  */
+
+static void
+my_exit (status)
+     int status;
+{
+  if (c_file[0])
+    maybe_unlink (c_file);
+
+  if (o_file[0])
+    maybe_unlink (o_file);
+
+  exit (status);
+}
+
+
+#ifndef __STDC__
+
+/* Die when sys call fails. */
+
+/*VARARGS*/
+static void
+fatal_perror (va_alist)
+{
+  char *string;
+  va_list vptr;
+  int e = errno;
+
+  va_start (vptr);
+  string = va_arg (vptr, char *);
+  fprintf (stderr, "collect: ");
+  vfprintf (stderr, string, vptr);
+  fprintf (stderr, ": %s\n", strerror (e));
+  va_end (vptr);
+  my_exit (1);
+}
+
+/* Just die. */
+
+/*VARARGS*/
+static void
+fatal (va_alist)
+{
+  char *string;
+  va_list vptr;
+
+  va_start (vptr);
+  string = va_arg (vptr, char *);
+  fprintf (stderr, "collect: ");
+  vfprintf (stderr, string, vptr);
+  fprintf (stderr, "\n");
+  va_end (vptr);
+  my_exit (1);
+}
+
+/* Write error message.  */
+
+/*VARARGS*/
+static void
+error (va_alist)
+{
+  char *string;
+  va_list vptr;
+
+  va_start (vptr);
+  string = va_arg (vptr, char *);
+  fprintf (stderr, "collect: ");
+  vfprintf (stderr, string, vptr);
+  fprintf (stderr, "\n");
+  va_end (vptr);
+}
+
+#else
+
+static void
+fatal_perror (char *string, ...)
+{
+  va_list vptr;
+  int e = errno;
+
+  va_start (vptr, string);
+  fprintf (stderr, "collect: ");
+  vfprintf (stderr, string, vptr);
+  fprintf (stderr, ": %s\n", strerror (e));
+  va_end (vptr);
+  my_exit (1);
+}
+
+/* Just die. */
+
+static void
+fatal (char *string, ...)
+{
+  va_list vptr;
+
+  va_start (vptr, string);
+  fprintf (stderr, "collect: ");
+  vfprintf (stderr, string, vptr);
+  fprintf (stderr, "\n");
+  va_end (vptr);
+  my_exit (1);
+}
+
+/* Write error message.  */
+
+static void
+error (char *string, ...)
+{
+  va_list vptr;
+
+  va_start (vptr, string);
+  fprintf (stderr, "collect: ");
+  vfprintf (stderr, string, vptr);
+  fprintf (stderr, "\n");
+  va_end (vptr);
+}
+#endif
+
+
+/* In case obstack is linked in, and abort is defined to fancy_abort,
+   provide a default entry.  */
+
+void
+fancy_abort ()
+{
+  fatal ("internal error");
+}
+
+
+static void
+handler (signo)
+     int signo;
+{
+  if (c_file[0])
+    maybe_unlink (c_file);
+
+  if (o_file[0])
+    maybe_unlink (o_file);
+
+  signal (signo, SIG_DFL);
+
+  fatal ("Caught signal %d [%s]", signo, sys_siglist[signo]);
+  kill (getpid (), signo);
+}
+
+
+generic *
+xcalloc (size1, size2)
+     size_t size1, size2;
+{
+  generic *ptr = calloc (size1, size2);
+  if (ptr)
+    return ptr;
+
+  fatal ("Out of memory.");
+  return (generic *)0;
+}
+
+generic *
+xmalloc (size)
+     size_t size;
+{
+  generic *ptr = malloc (size);
+  if (ptr)
+    return ptr;
+
+  fatal ("Out of memory.");
+  return (generic *)0;
+}
+
+
+/* Compute a string to use as the base of all temporary file names.
+   It is substituted for %g.  */
+
+static void
+choose_temp_base PROTO((void))
+{
+  char *base = getenv ("TMPDIR");
+  int len;
+
+  if (base == (char *)0)
+    {
+#ifdef P_tmpdir
+      if (access (P_tmpdir, R_OK | W_OK) == 0)
+	base = P_tmpdir;
+#endif
+      if (base == (char *)0)
+	{
+	  if (access ("/usr/tmp", R_OK | W_OK) == 0)
+	    base = "/usr/tmp/";
+	  else
+	    base = "/tmp/";
+	}
+    }
+
+  len = strlen (base);
+  temp_filename = xmalloc (len + sizeof("/ccXXXXXX"));
+  strcpy (temp_filename, base);
+  if (len > 0 && temp_filename[len-1] != '/')
+    temp_filename[len++] = '/';
+  strcpy (temp_filename + len, "ccXXXXXX");
+
+  mktemp (temp_filename);
+  temp_filename_length = strlen (temp_filename);
+}
+
+
+/* Main program. */
+
+int
+main (argc, argv)
+     int argc;
+     char *argv[];
+{
+  char *outfile		= "a.out";
+  char *arg;
+  FILE *outf;
+  char *ld_file_name;
+  char *c_file_name;
+  char *B_option;
+  char *p;
+  char *prefix;
+  char **c_argv		= (char **) xcalloc (sizeof (char *), argc+7);
+  char **c_ptr		= c_argv;
+  char **ld1_argv	= (char **) xcalloc (sizeof (char *), argc+2);
+  char **ld1		= ld1_argv;
+  char **ld2_argv	= (char **) xcalloc (sizeof (char *), argc+5);
+  char **ld2		= ld2_argv;
+  int first_file;
+  int len;
+  int clen;
+
+#ifdef DEBUG
+  debug = 1;
+  vflag = 1;
+#endif
+
+  if (argc < 2)
+    fatal ("no arguments");
+
+  signal (SIGQUIT, handler);
+  signal (SIGINT,  handler);
+  signal (SIGALRM, handler);
+  signal (SIGHUP,  handler);
+  signal (SIGSEGV, handler);
+  signal (SIGBUS,  handler);
+
+  /* Try to discover a valid linker/assembler/nm to use.  */
+  len = strlen (argv[0]);
+  prefix = (char *)0;
+  if (len >= sizeof ("ld")-1)
+    {
+      p = argv[0] + len - sizeof ("ld") + 1;
+      if (strcmp (p, "ld") == 0)
+	{
+	  prefix = argv[0];
+	  *p = '\0';
+	}
+    }
+
+  if (prefix == (char *)0)
+    {
+      p = strrchr (argv[0], '/');
+      if (p != (char *)0)
+	{
+	  prefix = argv[0];
+	  p[1] = '\0';
+	}
+
+#ifdef STANDARD_EXEC_PREFIX
+      else if (access (STANDARD_EXEC_PREFIX, X_OK) == 0)
+	prefix = STANDARD_EXEC_PREFIX;
+#endif
+
+#ifdef MD_EXEC_PREFIX
+      else if (access (MD_EXEC_PREFIX, X_OK) == 0)
+	prefix = MD_EXEC_PREFIX;
+#endif
+
+      else if (access ("/usr/ccs/gcc", X_OK) == 0)
+	prefix = "/usr/ccs/gcc/";
+
+      else if (access ("/usr/ccs/bin", X_OK) == 0)
+	prefix = "/usr/ccs/bin/";
+
+      else
+	prefix = "/bin/";
+    }
+
+  clen = len = strlen (prefix);
+
+#ifdef STANDARD_BIN_PREFIX
+  if (clen < sizeof (STANDARD_BIN_PREFIX) - 1)
+    clen = sizeof (STANDARD_BIN_PREFIX) - 1;
+#endif
+
+  ld_file_name = xcalloc (len + sizeof ("real-ld"), 1);
+  c_file_name  = xcalloc (clen + sizeof ("gcc"), 1);
+  nm_file_name = xcalloc (len + sizeof ("gnm"), 1);
+  B_option     = xcalloc (len + sizeof ("-B"), 1);
+
+  memcpy (ld_file_name, prefix, len);
+  strcpy (ld_file_name + len, "real-ld");
+  if (access (ld_file_name, X_OK) < 0)
+    {
+      strcpy (ld_file_name + len, "gld");
+      if (access (ld_file_name, X_OK) < 0)
+	{
+	  free (ld_file_name);
+#ifdef REAL_LD_FILE_NAME
+	  ld_file_name = REAL_LD_FILE_NAME;
+#else
+	  ld_file_name = (access ("/usr/bin/ld", X_OK) == 0) ? "/usr/bin/ld" : "/bin/ld";
+#endif
+	}
+    }
+
+  memcpy (c_file_name, prefix, len);
+  strcpy (c_file_name + len, "gcc");
+  if (access (c_file_name, X_OK) < 0)
+    {
+#ifdef STANDARD_BIN_PREFIX
+      strcpy (c_file_name, STANDARD_BIN_PREFIX);
+      strcat (c_file_name, "gcc");
+      if (access (c_file_name, X_OK) < 0)
+#endif
+	{
+#ifdef STANDARD_EXEC_PREFIX
+	  strcpy (c_file_name, STANDARD_EXEC_PREFIX);
+	  strcat (c_file_name, "gcc");
+	  if (access (c_file_name, X_OK) < 0)
+#endif
+	    {
+	      strcpy (c_file_name, "gcc");
+	    }
+	}
+    }
+
+  memcpy (nm_file_name, prefix, len);
+  strcpy (nm_file_name + len, "nm");
+  if (access (nm_file_name, X_OK) < 0)
+    {
+      strcpy (nm_file_name + len, "gnm");
+      if (access (nm_file_name, X_OK) < 0)
+	{
+	  free (nm_file_name);
+#ifdef REAL_NM_FILE_NAME
+	  nm_file_name = REAL_NM_FILE_NAME;
+#else
+	  nm_file_name = (access ("/usr/bin/nm", X_OK) == 0) ? "/usr/bin/nm" : "/bin/nm";
+#endif
+	}
+    }
+
+  strcpy (B_option, "-B");
+  strcpy (B_option + sizeof ("-B") - 1, prefix);
+
+  *ld1++ = *ld2++ = "ld";
+
+  /* Make temp file names. */
+  choose_temp_base ();
+  c_file = xcalloc (temp_filename_length + sizeof (".c"), 1);
+  o_file = xcalloc (temp_filename_length + sizeof (".o"), 1);
+  sprintf (c_file, "%s.c", temp_filename);
+  sprintf (o_file, "%s.o", temp_filename);
+  *c_ptr++ = "gcc";
+  *c_ptr++ = "-c";
+  *c_ptr++ = "-o";
+  *c_ptr++ = o_file;
+
+  /* Parse arguments.  Remember output file spec, pass the rest to ld. */
+  /* After the first file, put in the c++ rt0 */
+  first_file = 1;
+  while ((arg = *++argv) != (char *)0)
+    {
+      *ld1++ = *ld2++ = arg;
+
+      if (arg[0] == '-')
+	  switch (arg[1])
+	    {
+	    case 'd':
+	      if (!strcmp (arg, "-debug"))
+		{
+		  debug = 1;
+		  vflag = 1;
+		  ld1--;
+		  ld2--;
+		}
+	      break;
+
+	      /* pass -f<xxx>, -B<xxx>, -b<xxx>, -V<xxx>, and -m<xxx>
+		 options to gcc.  This allows options to be passed
+		 that affect search rules, and the size of pointers. */
+	    case 'b':
+	    case 'B':
+	    case 'f':
+	    case 'm':
+	    case 'V':
+	      if (arg[1] != '\0')
+		{
+		  ld1--;
+		  ld2--;
+		  *c_ptr++ = arg;
+		}
+	      break;
+
+	    case 'o':
+	      outfile = (arg[2] == '\0') ? argv[1] : &arg[2];
+	      break;
+
+	    case 'r':
+	      if (arg[2] == '\0')
+		rflag = 1;
+	      break;
+
+	    case 'v':
+	      if (arg[2] == '\0')
+		vflag = 1;
+	      break;
+	    }
+
+      else if (first_file
+	       && (p = strrchr (arg, '.')) != (char *)0
+	       && strcmp (p, ".o") == 0)
+	{
+	  first_file = 0;
+	  *ld2++ = o_file;
+	}
+    }
+
+  *c_ptr++ = B_option;
+  *c_ptr++ = c_file;
+  *c_ptr = *ld1 = *ld2 = (char *)0;
+
+  if (vflag)
+    {
+      fprintf (stderr, "GNU COLLECT2 version %s", version_string);
+#ifdef TARGET_VERSION
+      TARGET_VERSION;
+#endif
+      fprintf (stderr, "\n");
+    }
+
+  if (debug)
+    {
+      fprintf (stderr, "prefix       = %s\n", prefix);
+      fprintf (stderr, "ld_file_name = %s\n", ld_file_name);
+      fprintf (stderr, "c_file_name  = %s\n", c_file_name);
+      fprintf (stderr, "nm_file_name = %s\n", nm_file_name);
+      fprintf (stderr, "B_option     = %s\n", B_option);
+      fprintf (stderr, "c_file       = %s\n", c_file);
+      fprintf (stderr, "o_file       = %s\n", o_file);
+    }
+
+  /* Load the program, searching all libraries.
+     Examine the namelist with nm and search it for static constructors
+     and destructors to call.
+     Write the constructor and destructor tables to a .s file and reload. */
+
+  fork_execute (ld_file_name, ld1_argv);
+
+  /* If -r, don't build the constructor or destructor list, just return now.  */
+  if (rflag)
+    return 0;
+
+  scan_prog_file (outfile, PASS_FIRST);
+
+  if (debug)
+    {
+      fprintf (stderr, "%d constructor(s) found\n", constructors.number);
+      fprintf (stderr, "%d destructor(s)  found\n", destructors.number);
+    }
+
+  if (constructors.number == 0 && destructors.number == 0)
+    return 0;
+
+  outf = fopen (c_file, "w");
+  if (outf == (FILE *)0)
+    fatal_perror ("Can't write %s", c_file);
+
+  write_c_file (outf, c_file);
+
+  if (fclose (outf))
+    fatal_perror ("Can't close %s", c_file);
+
+  if (debug)
+    {
+      fprintf (stderr, "\n========== outfile = %s, c_file = %s\n", outfile, c_file);
+      write_c_file (stderr, "stderr");
+      fprintf (stderr, "========== end of c_file\n\n");
+    }
+
+  /* Assemble the constructor and destructor tables.
+     Link the tables in with the rest of the program. */
+
+  fork_execute (c_file_name,  c_argv);
+  fork_execute (ld_file_name, ld2_argv);
+
+  /* Let scan_prog_file do any final mods (OSF/rose needs this for
+     constructors/destructors in shared libraries.  */
+  scan_prog_file (outfile, PASS_SECOND);
+
+  maybe_unlink (c_file);
+  maybe_unlink (o_file);
+  return 0;
+}
+
+
+/* Wait for a process to finish, and exit if a non-zero status is found. */
+
+static void
+do_wait (prog)
+     char *prog;
+{
+  int status;
+
+  wait (&status);
+  if (status)
+    {
+      int sig = WTERMSIG (status);
+      int ret;
+
+      if (sig != -1 && sig != 0)
+	{
+	  error ("%s terminated with signal %d [%s]%s",
+		 prog,
+		 sig,
+		 sys_siglist[sig],
+		 (status & 0200) ? ", core dumped" : "");
+
+	  my_exit (127);
+	}
+
+      ret = WEXITSTATUS (status);
+      if (ret != -1 && ret != 0)
+	{
+	  error ("%s returned %d exit status", prog, ret);
+	  my_exit (ret);
+	}
+    }
+}
+
+
+/* Fork and execute a program, and wait for the reply.  */
+
+static void
+fork_execute (prog, argv)
+     char *prog;
+     char **argv;
+{
+  int pid;
+  void (*int_handler) PROTO((int));
+  void (*quit_handler) PROTO((int));
+
+  if (vflag || debug)
+    {
+      char **p_argv;
+      char *str;
+
+      fprintf (stderr, "%s", prog);
+      for (p_argv = &argv[1]; (str = *p_argv) != (char *)0; p_argv++)
+	fprintf (stderr, " %s", str);
+
+      fprintf (stderr, "\n");
+    }
+
+  fflush (stdout);
+  fflush (stderr);
+
+  pid = vfork ();
+  if (pid == -1)
+    fatal_perror ("vfork");
+
+  if (pid == 0)			/* child context */
+    {
+      execvp (prog, argv);
+      fatal_perror ("Execute %s", prog);
+    }
+
+  int_handler  = (void (*)PROTO((int)))signal (SIGINT,  SIG_IGN);
+  quit_handler = (void (*)PROTO((int)))signal (SIGQUIT, SIG_IGN);
+
+  do_wait (prog);
+
+  signal (SIGINT,  int_handler);
+  signal (SIGQUIT, quit_handler);
+}
+
+
+/* Unlink a file unless we are debugging.  */
+
+static void
+maybe_unlink (file)
+     char *file;
+{
+  if (!debug)
+    unlink (file);
+  else
+    fprintf (stderr, "[Leaving %s]\n", file);
+}
+
+
+/* Add a name to a linked list.  */
+
+static void
+add_to_list (head_ptr, name)
+     struct head *head_ptr;
+     char *name;
+{
+  struct id *newid = (struct id *) xcalloc (sizeof (*newid) + strlen (name), 1);
+  static long sequence_number = 0;
+  newid->sequence = ++sequence_number;
+  strcpy (newid->name, name);
+
+  if (head_ptr->first)
+    head_ptr->last->next = newid;
+  else
+    head_ptr->first = newid;
+
+  head_ptr->last = newid;
+  head_ptr->number++;
+}
+
+/* Write: `prefix', the names on list LIST, `suffix'.  */
+
+static void
+write_list (stream, prefix, list)
+     FILE *stream;
+     char *prefix;
+     struct id *list;
+{
+  while (list)
+    {
+      fprintf (stream, "%sx%d,\n", prefix, list->sequence);
+      list = list->next;
+    }
+}
+
+static void
+write_list_with_asm (stream, prefix, list)
+     FILE *stream;
+     char *prefix;
+     struct id *list;
+{
+  while (list)
+    {
+      fprintf (stream, "%sx%d asm (\"%s\");\n",
+	       prefix, list->sequence, list->name);
+      list = list->next;
+    }
+}
+
+/* Write the constructor/destructor tables. */
+
+static void
+write_c_file (stream, name)
+     FILE *stream;
+     char *name;
+{
+  /* Write the tables as C code  */
+
+  fprintf (stream, "typedef void entry_pt();\n\n");
+    
+  write_list_with_asm (stream, "entry_pt ", constructors);
+    
+  fprintf (stream, "\nentry_pt * __CTOR_LIST__[] = {\n");
+  fprintf (stream, "\t(entry_pt *) %d,\n", constructors.number);
+  write_list (stream, "\t", constructors);
+  fprintf (stream, "\t0\n};\n\n");
+
+  write_list_with_asm (stream, "entry_pt ", destructors);
+
+  fprintf (stream, "\nentry_pt * __DTOR_LIST__[] = {\n");
+  fprintf (stream, "\t(entry_pt *) %d,\n", destructors.number);
+  write_list (stream, "\t", destructors);
+  fprintf (stream, "\t0\n};\n\n");
+
+  fprintf (stream, "extern entry_pt __main;\n");
+  fprintf (stream, "entry_pt *__main_reference = __main;\n\n");
+}
+
+
+#ifndef OBJECT_FORMAT_ROSE
+
+/* OSF/rose specific version to scan the name list of the loaded
+   program for the symbols g++ uses for static constructors and
+   destructors.
+
+   The constructor table begins at __CTOR_LIST__ and contains a count
+   of the number of pointers (or -1 if the constructors are built in a
+   separate section by the linker), followed by the pointers to the
+   constructor functions, terminated with a null pointer.  The
+   destructor table has the same format, and begins at __DTOR_LIST__.  */
+
+static void
+scan_prog_file (prog_name, which_pass)
+     char *prog_name;
+     enum pass which_pass;
+{
+  void (*int_handler) PROTO((int));
+  void (*quit_handler) PROTO((int));
+  char *nm_argv[4];
+  int pid;
+  int argc = 0;
+  int pipe_fd[2];
+  char *p, buf[1024];
+  FILE *inf;
+
+  if (which_pass != PASS_FIRST)
+    return;
+
+  nm_argv[ argc++ ] = "nm";
+  if (NM_FLAGS[0] != '\0')
+    nm_argv[ argc++ ] = NM_FLAGS;
+
+  nm_argv[ argc++ ] = prog_name;
+  nm_argv[ argc++ ] = (char *)0;
+
+  if (pipe (pipe_fd) < 0)
+    fatal_perror ("pipe");
+
+  inf = fdopen (pipe_fd[0], "r");
+  if (inf == (FILE *)0)
+    fatal_perror ("fdopen");
+
+  /* Trace if needed.  */
+  if (vflag)
+    {
+      char **p_argv;
+      char *str;
+
+      fprintf (stderr, "%s", nm_file_name);
+      for (p_argv = &nm_argv[1]; (str = *p_argv) != (char *)0; p_argv++)
+	fprintf (stderr, " %s", str);
+
+      fprintf (stderr, "\n");
+    }
+
+  fflush (stdout);
+  fflush (stderr);
+
+  /* Spawn child nm on pipe */
+  pid = vfork ();
+  if (pid == -1)
+    fatal_perror ("vfork");
+
+  if (pid == 0)			/* child context */
+    {
+      /* setup stdout */
+      if (dup2 (pipe_fd[1], 1) < 0)
+	fatal_perror ("Dup2 (%d, 1)", pipe_fd[1]);
+
+      if (close (pipe_fd[0]) < 0)
+	fatal_perror ("Close (%d)", pipe_fd[0]);
+
+      if (close (pipe_fd[1]) < 0)
+	fatal_perror ("Close (%d)", pipe_fd[1]);
+
+      execv (nm_file_name, nm_argv);
+      fatal_perror ("Execute %s", nm_file_name);
+    }
+
+  /* Parent context from here on.  */
+  int_handler  = (void (*)PROTO((int)))signal (SIGINT,  SIG_IGN);
+  quit_handler = (void (*)PROTO((int)))signal (SIGQUIT, SIG_IGN);
+
+  if (close (pipe_fd[1]) < 0)
+    fatal_perror ("Close (%d)", pipe_fd[1]);
+
+  if (debug)
+    fprintf (stderr, "\nnm output with constructors/destructors.\n");
+
+  /* Read each line of nm output.  */
+  while (fgets (buf, sizeof buf, inf) != (char *)0)
+    {
+      int ch, ch2;
+      char *start;
+      char *end;
+
+      /* If it contains a constructor or destructor name, add the name
+	 to the appropriate list. */
+
+      for (p = buf; (ch = *p) != '\0' && ch != '\n' && ch != '_'; p++)
+	;
+
+      if (ch == '\0' || ch == '\n')
+	continue;
+
+      start = p;
+      while ((ch = *p) == '_')	/* skip any extra '_' inserted */
+	p++;
+
+      for (end = p; (ch2 = *end) != '\0' && !isspace (ch2); end++)
+	;
+
+      *end = '\0';
+      if (ch == 'G')
+	{
+	  if (! strncmp (p, "GLOBAL_$I$", 10))
+	    add_to_list (&constructors, p-1);
+
+	  else if (! strncmp (p, "GLOBAL_$D$", 10))
+	    add_to_list (&destructors, p-1);
+
+	  else				/* not a constructor or destructor */
+	    continue;
+	}
+
+      else if (ch == 's' && (p - start) >= 2)
+	{
+	  if (! strncmp (p, "sti__", 5))
+	    add_to_list (&constructors, p-2);
+
+	  else if (! strncmp (p, "std__", 5))
+	    add_to_list (&destructors, p-2);
+
+	  else				/* not a constructor or destructor */
+	    continue;
+	}
+
+      else
+	continue;
+
+      if (debug)
+	fprintf (stderr, "\t%s\n", buf);
+    }
+
+  if (debug)
+    fprintf (stderr, "\n");
+
+  if (fclose (inf) != 0)
+    fatal_perror ("fclose of pipe");
+
+  do_wait (nm_file_name);
+
+  signal (SIGINT,  int_handler);
+  signal (SIGQUIT, quit_handler);
+}
+
+#endif /* !OBJECT_FORMAT_ROSE */
+
+
+/*
+ * OSF/rose specific stuff.
+ */
+
+#ifdef OBJECT_FORMAT_ROSE
+
+/* Union of the various load commands */
+
+typedef union load_union
+{
+  ldc_header_t			hdr;	/* common header */
+  load_cmd_map_command_t	map;	/* map indexing other load cmds */
+  interpreter_command_t		iprtr;	/* interpereter pathname */
+  strings_command_t		str;	/* load commands strings section */
+  region_command_t		region;	/* region load command */
+  reloc_command_t		reloc;	/* relocation section */
+  package_command_t		pkg;	/* package load command */
+  symbols_command_t		sym;	/* symbol sections */
+  entry_command_t		ent;	/* program start section */
+  gen_info_command_t		info;	/* object information */
+  func_table_command_t		func;	/* function constructors/destructors */
+} load_union_t;
+
+/* Structure to point to load command and data section in memory.  */
+
+typedef struct load_all
+{
+  load_union_t *load;			/* load command */
+  char *section;			/* pointer to section */
+} load_all_t;
+
+/* Structure to contain information about a file mapped into memory.  */
+
+struct file_info
+{
+  char *start;				/* start of map */
+  char *name;				/* filename */
+  long	size;				/* size of the file */
+  long  rounded_size;			/* size rounded to page boundary */
+  int	fd;				/* file descriptor */
+  int	rw;				/* != 0 if opened read/write */
+  int	use_mmap;			/* != 0 if mmap'ed */
+};
+
+extern int decode_mach_o_hdr		PROTO((	void *in_bufp,
+						size_t in_bufsize,
+						unsigned long hdr_version,
+						mo_header_t *headerp ));
+
+extern int encode_mach_o_hdr		PROTO((	mo_header_t *headerp,
+						void *out_bufp,
+						size_t out_bufsize ));
+
+static void bad_header			PROTO(( int status ));
+
+static void print_header		PROTO(( mo_header_t *hdr_ptr ));
+
+static void print_load_command		PROTO(( load_union_t *load_hdr,
+					        size_t offset,
+					        int number ));
+
+static void add_func_table		PROTO(( mo_header_t *hdr_p,
+					        load_all_t *load_array,
+					        symbol_info_t *sym,
+					        int type ));
+
+static struct file_info	*read_file	PROTO((	char *, int, int ));
+
+static void end_file			PROTO((	struct file_info * ));
+
+
+/* OSF/rose specific version to scan the name list of the loaded
+   program for the symbols g++ uses for static constructors and
+   destructors.
+
+   The constructor table begins at __CTOR_LIST__ and contains a count
+   of the number of pointers (or -1 if the constructors are built in a
+   separate section by the linker), followed by the pointers to the
+   constructor functions, terminated with a null pointer.  The
+   destructor table has the same format, and begins at __DTOR_LIST__.  */
+
+static void
+scan_prog_file (prog_name, which_pass)
+     char *prog_name;
+     enum pass which_pass;
+{
+  char *obj;
+  mo_header_t hdr;
+  load_all_t *load_array;
+  load_all_t *load_end;
+  load_all_t *load_cmd;
+  int symbol_load_cmds;
+  off_t offset;
+  int i;
+  int num_syms;
+  int status;
+  char *str_sect;
+  struct file_info *obj_file;
+  int prog_fd;
+  mo_lcid_t cmd_strings	  = -1;
+  symbol_info_t *main_sym = 0;
+  int rw		  = (which_pass != PASS_FIRST);
+
+  prog_fd = open (prog_name, (rw) ? O_RDWR : O_RDONLY);
+  if (prog_fd < 0)
+    fatal_perror ("Can't read %s", prog_name);
+
+  obj_file = read_file (prog_name, prog_fd, rw);
+  obj = obj_file->start;
+
+  status = decode_mach_o_hdr (obj, MO_SIZEOF_RAW_HDR, MOH_HEADER_VERSION, &hdr);
+  if (status != MO_HDR_CONV_SUCCESS)
+    bad_header (status);
+
+
+  /* Do some basic sanity checks.  Note we explicitly use the big endian magic number,
+     since the hardware will automatically swap bytes for us on loading little endian
+     integers.  */
+
+#ifndef CROSS_COMPILE
+  if (hdr.moh_magic != MOH_MAGIC_MSB
+      || hdr.moh_header_version != MOH_HEADER_VERSION
+      || hdr.moh_byte_order != OUR_BYTE_ORDER
+      || hdr.moh_data_rep_id != OUR_DATA_REP_ID
+      || hdr.moh_cpu_type != OUR_CPU_TYPE
+      || hdr.moh_cpu_subtype != OUR_CPU_SUBTYPE
+      || hdr.moh_vendor_type != OUR_VENDOR_TYPE)
+    {
+      fatal ("incompatibilities exist between object file & expected values.");
+    }
+#endif
+
+  if (debug)
+    print_header (&hdr);
+
+  offset = hdr.moh_first_cmd_off;
+  load_end = load_array
+    = (load_all_t *) xcalloc (sizeof (load_all_t), hdr.moh_n_load_cmds + 2);
+
+  /* Build array of load commands, calculating the offsets */
+  for (i = 0; i < hdr.moh_n_load_cmds; i++)
+    {
+      load_union_t *load_hdr;		/* load command header */
+
+      load_cmd = load_end++;
+      load_hdr = (load_union_t *) (obj + offset);
+
+      /* If modifing the program file, copy the header.  */
+      if (rw)
+	{
+	  load_union_t *ptr = (load_union_t *) xmalloc (load_hdr->hdr.ldci_cmd_size);
+	  memcpy (ptr, load_hdr, load_hdr->hdr.ldci_cmd_size);
+	  load_hdr = ptr;
+
+	  /* null out old command map, because we will rewrite at the end.  */
+	  if (ptr->hdr.ldci_cmd_type == LDC_CMD_MAP)
+	    {
+	      cmd_strings = ptr->map.lcm_ld_cmd_strings;
+	      ptr->hdr.ldci_cmd_type = LDC_UNDEFINED;
+	    }
+	}
+
+      load_cmd->load = load_hdr;
+      if (load_hdr->hdr.ldci_section_off > 0)
+	load_cmd->section = obj + load_hdr->hdr.ldci_section_off;
+
+      if (debug)
+	print_load_command (load_hdr, offset, i);
+
+      offset += load_hdr->hdr.ldci_cmd_size;
+    }
+
+  /* If the last command is the load command map and is not undefined,
+     decrement the count of load commands.  */
+  if (rw && load_end[-1].load->hdr.ldci_cmd_type == LDC_UNDEFINED)
+    {
+      load_end--;
+      hdr.moh_n_load_cmds--;
+    }
+
+  /* Go through and process each symbol table section.  */
+  symbol_load_cmds = 0;
+  for (load_cmd = load_array; load_cmd < load_end; load_cmd++)
+    {
+      load_union_t *load_hdr = load_cmd->load;
+
+      if (load_hdr->hdr.ldci_cmd_type == LDC_SYMBOLS)
+	{
+	  symbol_load_cmds++;
+
+	  if (debug)
+	    {
+	      char *kind = "uknown";
+
+	      switch (load_hdr->sym.symc_kind)
+		{
+		case SYMC_IMPORTS:	   kind = "imports"; break;
+		case SYMC_DEFINED_SYMBOLS: kind = "defined"; break;
+		case SYMC_STABS:	   kind = "stabs";   break;
+		}
+
+	      fprintf (stderr, "\nProcessing symbol table #%d, offset = 0x%.8lx, kind = %s\n",
+		       symbol_load_cmds, load_hdr->hdr.ldci_section_off, kind);
+	    }
+
+	  if (load_hdr->sym.symc_kind != SYMC_DEFINED_SYMBOLS)
+	    continue;
+
+	  str_sect = load_array[ load_hdr->sym.symc_strings_section ].section;
+	  if (str_sect == (char *)0)
+	    fatal ("string section missing");
+
+	  if (load_cmd->section == (char *)0)
+	    fatal ("section pointer missing");
+
+	  num_syms = load_hdr->sym.symc_nentries;
+	  for (i = 0; i < num_syms; i++)
+	    {
+	      symbol_info_t *sym = ((symbol_info_t *) load_cmd->section) + i;
+	      char *name = sym->si_name.symbol_name + str_sect;
+	      char *name_start = name;
+
+	      if (name[0] != '_')
+		continue;
+
+	      while (*++name == '_')	/* skip any extra '_' inserted */
+		;
+
+	      if (rw)
+		{
+		  if (*name != 'm' || (name - name_start) < 2
+		      || strcmp (name, "main"))
+		    continue;
+
+		  main_sym = sym;
+		}
+
+	      else if (*name == 'G')
+		{
+		  if (! strncmp (name, "GLOBAL_$I$", 10))
+		    add_to_list (&constructors, name_start);
+
+		  else if (! strncmp (name, "GLOBAL_$D$", 10))
+		    add_to_list (&destructors, name_start);
+
+		  else		/* not a constructor or destructor */
+		    continue;
+		}
+
+	      else if (*name == 's' && (name - name_start) > 2)
+		{
+		  if (! strncmp (name, "sti__", 5))
+		    add_to_list (&constructors, name_start);
+
+		  else if (! strncmp (name, "std__", 5))
+		    add_to_list (&destructors, name_start);
+
+		  else		/* not a constructor or destructor */
+		    continue;
+		}
+
+	      else
+		continue;
+
+	      if (debug)
+		fprintf (stderr, "\ttype = 0x%.4x, sc = 0x%.2x, flags = 0x%.8x, name = %.30s\n",
+			 sym->si_type, sym->si_sc_type, sym->si_flags, name);
+	    }
+	}
+    }
+
+  if (symbol_load_cmds == 0)
+    fatal ("no symbol table found.");
+
+  /* Update the program file now, rewrite header and load commands.  At present,
+     we assume that there is enough space after the last load command to insert
+     one more.  Since the first section written out is page aligned, and the
+     number of load commands is small, this is ok for the present.  */
+
+  if (rw)
+    {
+      load_union_t *load_map;
+      size_t size;
+
+      if (cmd_strings == -1)
+	fatal ("no cmd_strings found.");
+
+      /* Add __main to initializer list.  */
+      if (main_sym != (symbol_info_t *)0)
+	add_func_table (&hdr, load_array, main_sym, FNTC_INITIALIZATION);
+
+      if (debug)
+	fprintf (stderr, "\nUpdating header and load commands.\n\n");
+
+      hdr.moh_n_load_cmds++;
+      size = sizeof (load_cmd_map_command_t) + (sizeof (mo_offset_t) * (hdr.moh_n_load_cmds - 1));
+
+      /* Create new load command map.  */
+      if (debug)
+	fprintf (stderr, "load command map, %d cmds, new size %ld.\n",
+		 (int)hdr.moh_n_load_cmds, (long)size);
+
+      load_map = (load_union_t *) xcalloc (1, size);
+      load_map->map.ldc_header.ldci_cmd_type = LDC_CMD_MAP;
+      load_map->map.ldc_header.ldci_cmd_size = size;
+      load_map->map.lcm_ld_cmd_strings = cmd_strings;
+      load_map->map.lcm_nentries = hdr.moh_n_load_cmds;
+      load_array[hdr.moh_n_load_cmds-1].load = load_map;
+
+      offset = hdr.moh_first_cmd_off;
+      for (i = 0; i < hdr.moh_n_load_cmds; i++)
+	{
+	  load_map->map.lcm_map[i] = offset;
+	  if (load_array[i].load->hdr.ldci_cmd_type == LDC_CMD_MAP)
+	    hdr.moh_load_map_cmd_off = offset;
+
+	  offset += load_array[i].load->hdr.ldci_cmd_size;
+	}
+
+      hdr.moh_sizeofcmds = offset - MO_SIZEOF_RAW_HDR;
+
+      if (debug)
+	print_header (&hdr);
+
+      /* Write header */
+      status = encode_mach_o_hdr (&hdr, obj, MO_SIZEOF_RAW_HDR);
+      if (status != MO_HDR_CONV_SUCCESS)
+	bad_header (status);
+
+      if (debug)
+	fprintf (stderr, "writing load commands.\n\n");
+
+      /* Write load commands */
+      offset = hdr.moh_first_cmd_off;
+      for (i = 0; i < hdr.moh_n_load_cmds; i++)
+	{
+	  load_union_t *load_hdr = load_array[i].load;
+	  size_t size = load_hdr->hdr.ldci_cmd_size;
+
+	  if (debug)
+	    print_load_command (load_hdr, offset, i);
+
+	  memcpy (obj + offset, load_hdr, size);
+	  offset += size;
+	}
+    }
+
+  end_file (obj_file);
+
+  if (close (prog_fd))
+    fatal_perror ("Can't close %s", prog_name);
+
+  if (debug)
+    fprintf (stderr, "\n");
+}
+
+
+/* Add a function table to the load commands to call a function
+   on initition or termination of the process.  */
+
+static void
+add_func_table (hdr_p, load_array, sym, type)
+     mo_header_t *hdr_p;		/* pointer to global header */
+     load_all_t *load_array;		/* array of ptrs to load cmds */
+     symbol_info_t *sym;		/* pointer to symbol entry */
+     int type;				/* fntc_type value */
+{
+  /* Add a new load command.  */
+  int num_cmds = ++hdr_p->moh_n_load_cmds;
+  int load_index = num_cmds - 1;
+  size_t size = sizeof (func_table_command_t) + sizeof (mo_addr_t);
+  load_union_t *ptr = xcalloc (1, size);
+  load_all_t *load_cmd;
+  int i;
+
+  /* Set the unresolved address bit in the header to force the loader to be
+     used, since kernel exec does not call the initialization functions.  */
+  hdr_p->moh_flags |= MOH_UNRESOLVED_F;
+
+  load_cmd = &load_array[load_index];
+  load_cmd->load = ptr;
+  load_cmd->section = (char *)0;
+
+  /* Fill in func table load command.  */
+  ptr->func.ldc_header.ldci_cmd_type = LDC_FUNC_TABLE;
+  ptr->func.ldc_header.ldci_cmd_size = size;
+  ptr->func.ldc_header.ldci_section_off = 0;
+  ptr->func.ldc_header.ldci_section_len = 0;
+  ptr->func.fntc_type = type;
+  ptr->func.fntc_nentries = 1;
+
+  /* copy address, turn it from abs. address to (region,offset) if necessary.  */
+  /* Is the symbol already expressed as (region, offset)?  */
+  if ((sym->si_flags & SI_ABSOLUTE_VALUE_F) == 0)
+    {
+      ptr->func.fntc_entry_loc[i].adr_lcid = sym->si_value.def_val.adr_lcid;
+      ptr->func.fntc_entry_loc[i].adr_sctoff = sym->si_value.def_val.adr_sctoff;
+    }
+
+  /* If not, figure out which region it's in.  */
+  else
+    {
+      mo_vm_addr_t addr = sym->si_value.abs_val;
+      int found = 0;
+
+      for (i = 0; i < load_index; i++)
+	{
+	  if (load_array[i].load->hdr.ldci_cmd_type == LDC_REGION)
+	    {
+	      region_command_t *region_ptr = &load_array[i].load->region;
+
+	      if ((region_ptr->regc_flags & REG_ABS_ADDR_F) != 0
+		  && addr >= region_ptr->regc_addr.vm_addr
+		  && addr <= region_ptr->regc_addr.vm_addr + region_ptr->regc_vm_size)
+		{
+		  ptr->func.fntc_entry_loc[0].adr_lcid = i;
+		  ptr->func.fntc_entry_loc[0].adr_sctoff = addr - region_ptr->regc_addr.vm_addr;
+		  found++;
+		  break;
+		}
+	    }
+	}
+
+      if (!found)
+	fatal ("could not convert 0x%l.8x into a region", addr);
+    }
+
+  if (debug)
+    fprintf (stderr,
+	     "%s function, region %d, offset = %ld (0x%.8lx)\n",
+	     (type == FNTC_INITIALIZATION) ? "init" : "term",
+	     (int)ptr->func.fntc_entry_loc[i].adr_lcid,
+	     (long)ptr->func.fntc_entry_loc[i].adr_sctoff,
+	     (long)ptr->func.fntc_entry_loc[i].adr_sctoff);
+
+}
+
+
+/* Print the global header for an OSF/rose object.  */
+
+static void
+print_header (hdr_ptr)
+     mo_header_t *hdr_ptr;
+{
+  fprintf (stderr, "\nglobal header:\n");
+  fprintf (stderr, "\tmoh_magic            = 0x%.8lx\n", hdr_ptr->moh_magic);
+  fprintf (stderr, "\tmoh_major_version    = %d\n", (int)hdr_ptr->moh_major_version);
+  fprintf (stderr, "\tmoh_minor_version    = %d\n", (int)hdr_ptr->moh_minor_version);
+  fprintf (stderr, "\tmoh_header_version   = %d\n", (int)hdr_ptr->moh_header_version);
+  fprintf (stderr, "\tmoh_max_page_size    = %d\n", (int)hdr_ptr->moh_max_page_size);
+  fprintf (stderr, "\tmoh_byte_order       = %d\n", (int)hdr_ptr->moh_byte_order);
+  fprintf (stderr, "\tmoh_data_rep_id      = %d\n", (int)hdr_ptr->moh_data_rep_id);
+  fprintf (stderr, "\tmoh_cpu_type         = %d\n", (int)hdr_ptr->moh_cpu_type);
+  fprintf (stderr, "\tmoh_cpu_subtype      = %d\n", (int)hdr_ptr->moh_cpu_subtype);
+  fprintf (stderr, "\tmoh_vendor_type      = %d\n", (int)hdr_ptr->moh_vendor_type);
+  fprintf (stderr, "\tmoh_load_map_cmd_off = %d\n", (int)hdr_ptr->moh_load_map_cmd_off);
+  fprintf (stderr, "\tmoh_first_cmd_off    = %d\n", (int)hdr_ptr->moh_first_cmd_off);
+  fprintf (stderr, "\tmoh_sizeofcmds       = %d\n", (int)hdr_ptr->moh_sizeofcmds);
+  fprintf (stderr, "\tmon_n_load_cmds      = %d\n", (int)hdr_ptr->moh_n_load_cmds);
+  fprintf (stderr, "\tmoh_flags            = 0x%.8lx", (long)hdr_ptr->moh_flags);
+
+  if (hdr_ptr->moh_flags & MOH_RELOCATABLE_F)
+    fprintf (stderr, ", relocatable");
+
+  if (hdr_ptr->moh_flags & MOH_LINKABLE_F)
+    fprintf (stderr, ", linkable");
+
+  if (hdr_ptr->moh_flags & MOH_EXECABLE_F)
+    fprintf (stderr, ", execable");
+
+  if (hdr_ptr->moh_flags & MOH_EXECUTABLE_F)
+    fprintf (stderr, ", executable");
+
+  if (hdr_ptr->moh_flags & MOH_UNRESOLVED_F)
+    fprintf (stderr, ", unresolved");
+
+  fprintf (stderr, "\n\n");
+  return;
+}
+
+
+/* Print a short summary of a load command.  */
+
+static void
+print_load_command (load_hdr, offset, number)
+     load_union_t *load_hdr;
+     size_t offset;
+     int number;
+{
+  mo_long_t type = load_hdr->hdr.ldci_cmd_type;
+  char *type_str = (char *)0;
+
+  switch (type)
+    {
+    case LDC_UNDEFINED:   type_str = "UNDEFINED";	break;
+    case LDC_CMD_MAP:	  type_str = "CMD_MAP";		break;
+    case LDC_INTERPRETER: type_str = "INTERPRETER";	break;
+    case LDC_STRINGS:	  type_str = "STRINGS";		break;
+    case LDC_REGION:	  type_str = "REGION";		break;
+    case LDC_RELOC:	  type_str = "RELOC";		break;
+    case LDC_PACKAGE:	  type_str = "PACKAGE";		break;
+    case LDC_SYMBOLS:	  type_str = "SYMBOLS";		break;
+    case LDC_ENTRY:	  type_str = "ENTRY";		break;
+    case LDC_FUNC_TABLE:  type_str = "FUNC_TABLE";	break;
+    case LDC_GEN_INFO:	  type_str = "GEN_INFO";	break;
+    }
+
+  fprintf (stderr,
+	   "cmd %2d, sz: 0x%.2lx, coff: 0x%.3lx, doff: 0x%.6lx, dlen: 0x%.6lx",
+	   number,
+	   (long) load_hdr->hdr.ldci_cmd_size,
+	   (long) offset,
+	   (long) load_hdr->hdr.ldci_section_off,
+	   (long) load_hdr->hdr.ldci_section_len);
+
+  if (type_str == (char *)0)
+    fprintf (stderr, ", ty: unknown (%ld)\n", (long) type);
+
+  else if (type != LDC_REGION)
+    fprintf (stderr, ", ty: %s\n", type_str);
+
+  else
+    {
+      char *region = "";
+      switch (load_hdr->region.regc_usage_type)
+	{
+	case REG_TEXT_T:	region = ", .text";	break;
+	case REG_DATA_T:	region = ", .data";	break;
+	case REG_BSS_T:		region = ", .bss";	break;
+	case REG_GLUE_T:	region = ", .glue";	break;
+#if defined (REG_RDATA_T) && defined (REG_SDATA_T) && defined (REG_SBSS_T) /*mips*/
+	case REG_RDATA_T:	region = ", .rdata";	break;
+	case REG_SDATA_T:	region = ", .sdata";	break;
+	case REG_SBSS_T:	region = ", .sbss";	break;
+#endif
+	}
+
+      fprintf (stderr, ", ty: %s, vaddr: 0x%.8lx, vlen: 0x%.6lx%s\n",
+	       type_str,
+	       (long) load_hdr->region.regc_vm_addr,
+	       (long) load_hdr->region.regc_vm_size,
+	       region);
+    }
+
+  return;
+}
+
+
+/* Fatal error when {en,de}code_mach_o_header fails.  */
+
+static void
+bad_header (status)
+     int status;
+{
+  char *msg = (char *)0;
+
+  switch (status)
+    {
+    case MO_ERROR_BAD_MAGIC:		msg = "bad magic number";		break;
+    case MO_ERROR_BAD_HDR_VERS:		msg = "bad header version";		break;
+    case MO_ERROR_BAD_RAW_HDR_VERS:	msg = "bad raw header version";		break;
+    case MO_ERROR_BUF2SML:		msg = "raw header buffer too small";	break;
+    case MO_ERROR_OLD_RAW_HDR_FILE:	msg = "old raw header file";		break;
+    case MO_ERROR_UNSUPPORTED_VERS:	msg = "unsupported version";		break;
+    }
+
+  if (msg == (char *)0)
+    fatal ("unknown {de,en}code_mach_o_hdr return value %d", status);
+  else
+    fatal ("%s", msg);
+}
+
+
+/* Read a file into a memory buffer.  */
+
+static struct file_info *
+read_file (name, fd, rw)
+     char *name;		/* filename */
+     int fd;			/* file descriptor */
+     int rw;			/* read/write */
+{
+  struct stat stat_pkt;
+  struct file_info *p = (struct file_info *) xcalloc (sizeof (struct file_info), 1);
+#ifdef USE_MMAP
+  static int page_size;
+#endif
+
+  if (fstat (fd, &stat_pkt) < 0)
+    fatal_perror ("fstat %s", name);
+
+  p->name	  = name;
+  p->size	  = stat_pkt.st_size;
+  p->rounded_size = stat_pkt.st_size;
+  p->fd		  = fd;
+  p->rw		  = rw;
+
+#ifdef USE_MMAP
+  if (debug)
+    fprintf (stderr, "mmap %s, %s\n", name, (rw) ? "read/write" : "read-only");
+
+  if (page_size == 0)
+    page_size = sysconf (_SC_PAGE_SIZE);
+
+  p->rounded_size = ((p->size + page_size - 1) / page_size) * page_size;
+  p->start = mmap ((caddr_t)0,
+		   (rw) ? p->rounded_size : p->size,
+		   (rw) ? (PROT_READ | PROT_WRITE) : PROT_READ,
+		   MAP_FILE | MAP_VARIABLE | MAP_SHARED,
+		   fd,
+		   0L);
+
+  if (p->start != (char *)0 && p->start != (char *)-1)
+    p->use_mmap = 1;
+
+  else
+#endif /* USE_MMAP */
+    {
+      long len;
+
+      if (debug)
+	fprintf (stderr, "read %s\n", name);
+
+      p->use_mmap = 0;
+      p->start = xmalloc (p->size);
+      if (lseek (fd, 0L, SEEK_SET) < 0)
+	fatal_perror ("lseek to 0 on %s", name);
+
+      len = read (fd, p->start, p->size);
+      if (len < 0)
+	fatal_perror ("read %s", name);
+
+      if (len != p->size)
+	fatal ("read %ld bytes, expected %ld, from %s", len, p->size, name);
+    }
+
+  return p;
+}
+
+
+/* Do anything necessary to write a file back from memory.  */
+
+static void
+end_file (ptr)
+     struct file_info *ptr;	/* file information block */
+{
+#ifdef USE_MMAP
+  if (ptr->use_mmap)
+    {
+      if (ptr->rw)
+	{
+	  if (debug)
+	    fprintf (stderr, "msync %s\n", ptr->name);
+
+	  if (msync (ptr->start, ptr->rounded_size, MS_ASYNC))
+	    fatal_perror ("msync %s", ptr->name);
+	}
+
+      if (debug)
+	fprintf (stderr, "munmap %s\n", ptr->name);
+
+      if (munmap (ptr->start, ptr->size))
+	fatal_perror ("munmap %s", ptr->name);
+    }
+  else
+#endif /* USE_MMAP */
+    {
+      if (ptr->rw)
+	{
+	  long len;
+
+	  if (debug)
+	    fprintf (stderr, "write %s\n", ptr->name);
+
+	  if (lseek (ptr->fd, 0L, SEEK_SET) < 0)
+	    fatal_perror ("lseek to 0 on %s", ptr->name);
+
+	  len = write (ptr->fd, ptr->start, ptr->size);
+	  if (len < 0)
+	    fatal_perror ("read %s", ptr->name);
+
+	  if (len != ptr->size)
+	    fatal ("wrote %ld bytes, expected %ld, to %s", len, ptr->size, ptr->name);
+	}
+
+      free ((generic *)ptr->start);
+    }
+
+  free ((generic *)ptr);
+}
+
+#endif /* OBJECT_FORMAT_ROSE */

gcc/config/vax/vms.h

+/* Output variables, constants and external declarations, for GNU compiler.
+   Copyright (C) 1988 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* This enables certain macros in vax.h, which will make an indirect
+   reference to an external symbol an invalid address.  This needs to be
+   defined before we include vax.h, since it determines which macros
+   are used for GO_IF_*.  */
+
+#define NO_EXTERNAL_INDIRECT_ADDRESS
+
+#include "vax.h"
+
+#undef LIB_SPEC
+#undef CPP_PREDEFINES
+#undef TARGET_VERSION
+#undef TARGET_DEFAULT
+#undef CALL_USED_REGISTERS
+#undef MAYBE_VMS_FUNCTION_PROLOGUE
+
+/* Predefine this in CPP because VMS limits the size of command options
+   and GNU CPP is not used on VMS except with GNU C.  */
+#define CPP_PREDEFINES "-Dvax -Dvms -DVMS -D__GNU__ -D__GNUC__"
+
+/* Strictly speaking, VMS does not use DBX at all, but the interpreter built
+   into gas only speaks straight DBX.  */
+
+#define DEFAULT_GDB_EXTENSIONS 0
+
+/* By default, allow $ to be part of an identifier.  */
+#define DOLLARS_IN_IDENTIFIERS 2
+
+#define TARGET_DEFAULT 1
+#define TARGET_VERSION fprintf (stderr, " (vax vms)");
+
+#define CALL_USED_REGISTERS {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1}
+
+#define __MAIN_NAME " main ("
+/*
+ * The MAYBE_VMS_FUNCTION_PROLOGUE macro works for both gcc and g++.  It
+ * first checks to see if the current routine is "main", which will only
+ * happen for GCC, and add the jsb if it is.  If is not the case then try and 
+ * see if __MAIN_NAME is part of current_function_name, which will only happen
+ * if we are running g++, and add the jsb if it is.  In gcc there should never
+ * be a space in the function name, and in g++ there is always a "(" in the
+ * function name, thus there should never be any confusion.
+ */
+#define MAYBE_VMS_FUNCTION_PROLOGUE(FILE)	\
+{ extern char *current_function_name;		\
+  if (!strcmp ("main", current_function_name))	\
+    fprintf(FILE, "\tjsb _c$main_args\n"); 	\
+  else {					\
+    char *p = current_function_name;		\
+    while (*p != '\0')				\
+      if (*p == *__MAIN_NAME)			\
+        if (strncmp(p, __MAIN_NAME, (sizeof __MAIN_NAME)-1) == 0) {\
+          fprintf(FILE, "\tjsb _c$main_args\n");\
+          break;				\
+        } else					\
+          p++;					\
+      else					\
+        p++;					\
+     };						\
+}
+
+/* This macro definition sets up a default value for `main' to return.  */
+#define DEFAULT_MAIN_RETURN  c_expand_return (integer_one_node)
+
+/* This makes use of a hook in varasm.c to mark all external variables
+   for us.  We use this to make sure that external variables are correctly
+   addressed.  Under VMS there is some brain damage in the linker that requires
+   us to do this.  */
+
+#define ENCODE_SECTION_INFO(decl)  				\
+  if (TREE_EXTERNAL (decl) && TREE_PUBLIC (decl)) 		\
+    SYMBOL_REF_FLAG (XEXP (DECL_RTL (decl), 0)) = 1; 
+
+/* Under VMS we write the actual size of the storage to be allocated even
+   though the symbol is external.  Although it is possible to give external
+   symbols a size of 0 (as unix does), the VMS linker does not make the
+   distinction between a variable definition and an external reference of a
+   variable, and thus the linker will not complain about a missing definition.
+   If we followed the unix example of giving external symbols a size of
+   zero, you tried to link a program where a given variable was externally
+   defined but none of the object modules contained a non-extern definition,
+   the linker would allocate 0 bytes for the variable, and any attempt to
+   use that variable would use the storage allocated to some other variable.
+
+   We must also select either const_section or data_section: this will indicate
+   whether or not the variable will get the readonly bit set.  Since the
+   VMS linker does not distinguish between a variable's definition and an
+   external reference, all usages of a given variable must have the readonly
+   bit set the same way, or the linker will get confused and give warning
+   messages.  */
+
+/* We used to round the size up to a multiple of 4,
+   but that causes linker errors sometimes when the variable was initialized
+   since the size of its definition was not likewise rounded up.  */
+
+#define ASM_OUTPUT_EXTERNAL(FILE,DECL,NAME)				\
+{ if (DECL_INITIAL (DECL) == 0 && TREE_CODE (DECL) != FUNCTION_DECL)	\
+    {									\
+      if (TREE_READONLY (decl) && ! TREE_THIS_VOLATILE (decl))		\
+	const_section ();						\
+      else								\
+	data_section ();						\
+      fputs (".comm ", (FILE));						\
+      assemble_name ((FILE), (NAME));					\
+      if (DECL_SIZE (DECL) == 0)					\
+        fprintf ((FILE), ",0\n");					\
+      else								\
+	{								\
+	  tree size_tree;						\
+	  size_tree = size_binop (CEIL_DIV_EXPR,			\
+	     DECL_SIZE (DECL), size_int (BITS_PER_UNIT));		\
+	  fprintf ((FILE), ",%d\n", TREE_INT_CST_LOW (size_tree));	\
+        }								\
+    }									\
+}
+
+/* Here we redefine ASM_OUTPUT_COMMON to select the data_section or the
+   const_section before writing the ".const" assembler directive.
+   If we were specifying a size of zero for external variables, we would
+   not have to select a section, since the assembler can assume that
+   when the size > 0, the storage is for a non-external, uninitialized
+   variable (for which a "const" declaration would be senseless),
+   and the assembler can make the storage read/write.
+
+   Since the ".const" directive specifies the actual size of the storage used
+   for both external and non-external variables, the assembler cannot
+   make this assumption, and thus it has no way of deciding if storage should
+   be read/write or read-only.  To resolve this, we give the assembler some
+   assistance, in the form of a ".const" or a ".data" directive.
+
+   Under GCC 1.40, external variables were declared with a size of zero.
+   The GNU assembler, GAS, will recognize the "-2" switch when built for VMS;
+   when compiling programs with GCC 2.n this switch should be used or the
+   assembler will not give the read-only attribute to external constants.
+   Failure to use this switch will result in linker warning messages about
+   mismatched psect attributes.  */
+
+#undef ASM_OUTPUT_COMMON
+
+#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)		\
+( ((TREE_READONLY (decl) && ! TREE_THIS_VOLATILE (decl))	\
+   ? (const_section (), 0) : (data_section (), 0)),		\
+  fputs (".comm ", (FILE)),					\
+  assemble_name ((FILE), (NAME)),				\
+  fprintf ((FILE), ",%u\n", (ROUNDED)))
+
+/* We define this to prevent the name mangler from putting dollar signs into
+   function names.  This isn't really needed, but it has been here for
+   some time and  removing it would cause the object files generated by the
+   compiler to be incompatible with the object files from a compiler that
+   had this defined.  Since it does no harm, we leave it in.  */
+
+#define NO_DOLLAR_IN_LABEL
+
+/* Add a "const" section.  This is viewed by the assember as being nearly
+   the same as the "data" section, with the only difference being that a
+   flag is set for variables declared while in the const section.  This
+   flag is used to determine whether or not the read/write bit should be
+   set in the Psect definition.  */
+
+#define EXTRA_SECTIONS in_const
+
+#define EXTRA_SECTION_FUNCTIONS				\
+void							\
+const_section ()					\
+{							\
+  if (in_section != in_const) {				\
+    fprintf(asm_out_file,".const\n");			\
+    in_section = in_const;				\
+  }							\
+}
+
+/* This macro contains the logic to decide which section a variable
+   should be stored in.  Static constant variables go in the text_section,
+   non-const variables go in the data_section, and non-static const
+   variables go in the const_section.
+
+   Since this macro is used in a number of places, we must also be able
+   to decide where to place string constants.  */
+
+#define SELECT_SECTION(T,RELOC)						\
+{									\
+  if (TREE_CODE (T) == VAR_DECL)					\
+    {									\
+      if (TREE_READONLY (T) && ! TREE_THIS_VOLATILE (T))		\
+	{								\
+	  if (TREE_PUBLIC (T))						\
+	    const_section ();						\
+	  else								\
+	    text_section ();						\
+	}								\
+      else								\
+	data_section ();						\
+    }									\
+  if (*tree_code_type[(int) TREE_CODE (T)] == 'c')			\
+    {									\
+      if ((TREE_CODE (T) == STRING_CST && flag_writable_strings))	\
+	data_section ();						\
+      else								\
+	text_section ();						\
+    }									\
+}
+
+/* This is used by a hook in varasm.c to write the assembler directives
+   that are needed to tell the startup code which constructors need to
+   be run.  */
+
+#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)				\
+{									\
+  fprintf ((FILE),".globl $$PsectAttributes_NOOVR$$__gxx_init_1\n"); 	\
+  data_section();							\
+  fprintf ((FILE),"$$PsectAttributes_NOOVR$$__gxx_init_1:\n\t.long\t"); \
+  assemble_name ((FILE), (NAME));					\
+  fputc ('\n', (FILE));							\
+}
+
+/* This is used by a hook in varasm.c to write the assembler directives
+   that are needed to tell the startup code which destructors need to
+   be run.  */
+
+#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)				\
+{									\
+  fprintf ((FILE),".globl $$PsectAttributes_NOOVR$$__gxx_clean_1\n"); 	\
+  data_section();							\
+  fprintf ((FILE),"$$PsectAttributes_NOOVR$$__gxx_clean_1:\n\t.long\t");\
+  assemble_name ((FILE), (NAME));					\
+  fputc ('\n', (FILE));							\
+}
+
+