Initial revision

2 files changed, 347 insertions, 0 deletions

diff --git a/src/prefix-args.c b/src/prefix-args.c
new file mode 100644
index 0000000000..8be1558f08
--- /dev/null
+++ b/src/prefix-args.c
@@ -0,0 +1,53 @@
+/* prefix-args.c - echo each argument, prefixed by a string.
+   Jim Blandy <[email protected]> - September 1992
+
+   When using GCC 2 as the linker in the build process, options
+   intended for the linker need to be prefixed with the "-Xlinker"
+   option.  If an option takes an argument, we need to use -Xlinker
+   twice - once for the option and once for its argument.  For
+   example, to run the linker with the options "-Bstatic" "-e"
+   "_start", you'd need to pass the following options to GCC:
+
+   -Xlinker -Bstatic -Xlinker -e -Xlinker _start.
+
+   The Emacs makefile used to use a Bourne Shell `for' loop to prefix
+   each linker option with "-Xlinker", but 1) the for loop was hairier
+   than one might hope because it had to work when there were no
+   arguments to pass to the linker - the shell barfs on a loop like
+   this:
+
+       for arg in ; do echo -Xlinker "$arg"; done
+
+   and 2) the whole compilation command containing this loop seems to
+   exit with a non-zero status and halt the build under Ultrix.
+
+   If I can't write a completely portable program to do this in C,
+   I'm quitting and taking up gardening.  */
+
+#include <stdio.h>
+
+main (argc, argv)
+     int argc;
+     char **argv;
+{
+  char *progname;
+  char *prefix;
+
+  progname = argv[0];
+  argc--, argv++;
+
+  if (argc < 1)
+    {
+      fprintf (stderr, "Usage: %s PREFIX ARGS...\n\
+Echo each ARG preceded by PREFIX and a space.\n", progname);
+      exit (2);
+    }
+
+  prefix = argv[0];
+  argc--, argv++;
+
+  for (; argc > 0; argc--, argv++)
+    printf ("%s %s%c", prefix, argv[0], (argc > 1) ? ' ' : '\n');
+
+  exit (0);
+}
diff --git a/src/unexapollo.c b/src/unexapollo.c
new file mode 100644
index 0000000000..4c87bfa3fe
--- /dev/null
+++ b/src/unexapollo.c
@@ -0,0 +1,294 @@
+/* unexapollo.c -- COFF File UNEXEC for GNU Emacs on Apollo SR10.x
+   Copyright (C) 1988, 1994 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs 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 Emacs 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 Emacs; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* Written by Leonard N. Zubkoff.  */
+
+#include "config.h"
+#include <fcntl.h>
+
+
+#include <a.out.h>
+#include <sys/file.h>
+#include <apollo/base.h>
+#include <apollo/ios.h>
+#include <apollo/type_uids.h>
+#include <apollo/dst.h>
+
+
+#define DST_RECORD_HDR_SIZE	2
+#define LONG_ALIGN(X)		(((X)+3)&(~3))
+
+
+void
+unexec (target_file_name, source_file_name)
+     char *target_file_name, *source_file_name;
+{
+  struct filehdr file_header;
+  struct aouthdr domain_header;
+  struct scnhdr *section, *sections, *sections_limit;
+  struct scnhdr *first_data_section, *last_data_section;
+  struct scnhdr *rwdi_section, *blocks_section;
+  struct reloc reloc_entry;
+  unsigned long data_size, old_data_section_size, source_file_offset_past_rwdi;
+  unsigned char buffer[4096];
+  long delta_before_rwdi, delta_after_rwdi, byte_count;
+  long first_changed_vaddr, old_rwdi_vaddr, i;
+  ios_$id_t target_file, source_file;
+  status_$t status;
+  /* Open the Source File. */
+  if ((source_file = open (source_file_name, O_RDONLY)) < 0)
+    error ("cannot open source file for input");
+  /* Read the File Header. */
+  if (read (source_file, &file_header, sizeof (file_header)) != sizeof (file_header))
+    error ("cannot read file header");
+  
+  /* Read the Domain Header. */
+  if (read (source_file, &domain_header, sizeof (domain_header))
+      != sizeof (domain_header))
+    error ("cannot read domain header");
+  /* Read the Section Headers. */
+  sections =
+    (struct scnhdr *) malloc (file_header.f_nscns*sizeof (struct scnhdr));
+  if (sections == (struct scnhdr *) 0)
+    error ("cannot allocate section header storage");
+  sections_limit = sections + file_header.f_nscns;
+  if (read (source_file, sections, file_header.f_nscns*sizeof (struct scnhdr))
+      != file_header.f_nscns*sizeof (struct scnhdr))
+    error ("cannot read section headers");
+  /* Compute the new Size of the Data Section. */
+  data_size = sbrk (0) - domain_header.data_start;
+  delta_before_rwdi = delta_after_rwdi = data_size - domain_header.dsize;
+  old_rwdi_vaddr = 0;
+  /* Find and Deallocate the .rwdi Section Information. */
+  for (rwdi_section = sections; rwdi_section != sections_limit; rwdi_section++)
+    if (strcmp (rwdi_section->s_name, ".rwdi") == 0)
+      {
+	/* If there are relocation entries, we cannot "unrelocate" them. */
+	if (rwdi_section->s_nreloc > 0)
+	  error (".rwdi section needs relocation - cannot dump Emacs");
+	delta_after_rwdi = delta_before_rwdi - rwdi_section->s_size;
+	old_rwdi_vaddr = rwdi_section->s_vaddr;
+	rwdi_section->s_paddr = 0;
+	rwdi_section->s_vaddr = 0;
+	rwdi_section->s_scnptr = 0;
+	rwdi_section->s_size = 0;
+	source_file_offset_past_rwdi = (rwdi_section+1)->s_scnptr;
+	break;
+      }
+  /* Skip over the Text Section Headers. */
+  for (section = sections; (section->s_flags & STYP_TEXT) != 0; section++) ;
+  /*
+    Find the First and Last Data Sections and Fixup
+    Section Header Relocation Pointers.
+    */
+  first_data_section = last_data_section = (struct scnhdr *) 0;
+  for (; section != sections_limit; section++)
+    {
+      if ((section->s_flags & STYP_DATA) != 0)
+	{
+	  if (first_data_section == (struct scnhdr *) 0)
+	    first_data_section = section;
+	  last_data_section = section;
+	}
+      if (section->s_relptr != 0)
+	section->s_relptr += delta_after_rwdi;
+    }
+  /* Increment the Size of the Last Data Section. */
+  old_data_section_size = last_data_section->s_size;
+  last_data_section->s_size += delta_before_rwdi;
+  
+  /* Update the File Header and Domain Header. */
+  file_header.f_symptr += delta_after_rwdi;
+  domain_header.dsize = data_size;
+  domain_header.bsize = 0;
+  /* Skip over subsequent Bss Section Headers. */
+  for (section = last_data_section+1;
+       (section->s_flags & STYP_BSS) != 0; section++) ;
+  /* Update the remaining Section Headers. */
+  blocks_section = (struct scnhdr *) 0;
+  first_changed_vaddr = 0;
+  for (; section != sections_limit; section++)
+    {
+      long delta = (section < rwdi_section ? delta_before_rwdi : delta_after_rwdi);
+      if (section->s_paddr != 0)
+	section->s_paddr += delta;
+      if (section->s_vaddr != 0)
+	{
+	  if (first_changed_vaddr == 0)
+	    first_changed_vaddr = section->s_vaddr;
+	  section->s_vaddr += delta;
+	}
+      if (section->s_scnptr != 0)
+	section->s_scnptr += delta;
+      if (strcmp (section->s_name, ".blocks") == 0)
+	blocks_section = section;
+      else if (strcmp (section->s_name, ".sri") == 0 &&
+	       domain_header.o_sri != 0)
+	domain_header.o_sri += delta;
+      else if (strcmp (section->s_name, ".inlib") == 0 &&
+	       domain_header.o_inlib != 0)
+	domain_header.o_inlib += delta;
+    }
+  /* Open the Target File. */
+  ios_$create (target_file_name, strlen (target_file_name), coff_$uid,
+	       ios_$recreate_mode, ios_$write_opt, &target_file, &status);
+  if (status.all != status_$ok)
+    error ("cannot open target file for output");
+  /* Write the File Header. */
+  if (write (target_file, &file_header, sizeof (file_header)) != sizeof (file_header))
+    error ("cannot write file header");
+  /* Write the Domain Header. */
+  if (write (target_file, &domain_header, sizeof (domain_header))
+      != sizeof (domain_header))
+    error ("cannot write domain header");
+  /* Write the Section Headers. */
+  if (write (target_file, sections, file_header.f_nscns*sizeof (struct scnhdr))
+      != file_header.f_nscns*sizeof (struct scnhdr))
+    error ("cannot write section headers");
+  /* Copy the Allocated Sections. */
+  for (section = sections; section != first_data_section; section++)
+    if (section->s_scnptr != 0)
+      CopyData (target_file, source_file, LONG_ALIGN(section->s_size));
+  /* Write the Expanded Data Segment. */
+  if (write (target_file, first_data_section->s_vaddr, data_size) != data_size)
+    error ("cannot write new data section");
+  
+  /* Skip over the Last Data Section and Copy until the .rwdi Section. */
+  if (lseek (source_file, last_data_section->s_scnptr
+	     +old_data_section_size, L_SET) == -1)
+    error ("cannot seek past data section");
+  for (section = last_data_section+1; section != rwdi_section; section++)
+    if (section->s_scnptr != 0)
+      CopyData (target_file, source_file, LONG_ALIGN(section->s_size));
+  /* Skip over the .rwdi Section and Copy Remainder of Source File. */
+  if (lseek (source_file, source_file_offset_past_rwdi, L_SET) == -1)
+    error ("cannot seek past .rwdi section");
+  while ((byte_count = read (source_file, buffer, sizeof (buffer))) > 0)
+    if (write (target_file, buffer, byte_count) != byte_count)
+      error ("cannot write data");
+  /* Unrelocate .data references to Global Symbols. */
+  for (section = first_data_section; section <= last_data_section; section++)
+    for (i = 0; i < section->s_nreloc; i++)
+      {
+	if  (lseek (source_file, section->s_relptr
+		    +i*sizeof (struct reloc)-delta_after_rwdi, L_SET) == -1)
+	  error ("cannot seek to relocation info");
+	if (read (source_file, &reloc_entry, sizeof (reloc_entry))
+	    != sizeof (reloc_entry))
+	  error ("cannot read reloc entry");
+	if (lseek (source_file, reloc_entry.r_vaddr-section->s_vaddr
+		   +section->s_scnptr, L_SET) == -1)
+	  error ("cannot seek to data element");
+	if (lseek (target_file, reloc_entry.r_vaddr-section->s_vaddr
+		   +section->s_scnptr, L_SET) == -1)
+	  error ("cannot seek to data element");
+	if (read (source_file, buffer, 4) != 4)
+	  error ("cannot read data element");
+	if (write (target_file, buffer, 4) != 4)
+	  error ("cannot write data element");
+      }
+  
+  /* Correct virtual addresses in .blocks section. */
+  if (blocks_section != (struct scnhdr *) 0)
+    {
+      dst_rec_t dst_record;
+      dst_rec_comp_unit_t *comp_unit;
+      unsigned short number_of_sections;
+      unsigned long section_base;
+      unsigned long section_offset = 0;
+      /* Find section tables and update section base addresses. */
+      while (section_offset < blocks_section->s_size)
+	{
+	  if (lseek (target_file,
+		     blocks_section->s_scnptr+section_offset, L_SET) == -1)
+	    error ("cannot seek to comp unit record");
+	  /* Handle pad records before the comp unit record. */
+	  if (read (target_file, &dst_record, DST_RECORD_HDR_SIZE)
+	      != DST_RECORD_HDR_SIZE)
+	    error ("cannot read dst record tag");
+	  if (dst_record.rec_type == dst_typ_pad)
+	    section_offset += DST_RECORD_HDR_SIZE;
+	  else if (dst_record.rec_type == dst_typ_comp_unit)
+	    {
+	      comp_unit = &dst_record.rec_data.comp_unit_;
+	      if  (read (target_file, comp_unit, sizeof (*comp_unit))
+		   != sizeof (*comp_unit))
+		error ("cannot read comp unit record");
+	      if (lseek (target_file, blocks_section->s_scnptr
+			 +section_offset
+#if dst_version_major == 1 && dst_version_minor < 4
+			 +comp_unit->section_table
+#else
+			 +comp_unit->section_table.rel_offset
+#endif
+			 +DST_RECORD_HDR_SIZE,
+			 L_SET) == -1)
+		error ("cannot seek to section table");
+	      if (read (target_file, &number_of_sections, sizeof (number_of_sections))
+		  != sizeof (number_of_sections))
+		error ("cannot read section table size");
+	      for (i = 0; i < number_of_sections; i++)
+		{
+		  if (read (target_file, &section_base, sizeof (section_base))
+		      != sizeof (section_base))
+		    error ("cannot read section base value");
+		  if (section_base < first_changed_vaddr)
+		    continue;
+		  else if (section_base < old_rwdi_vaddr)
+		    section_base += delta_before_rwdi;
+		  else section_base += delta_after_rwdi;
+		  if (lseek (target_file, -sizeof (section_base), L_INCR) == -1)
+		    error ("cannot seek to section base value");
+		  if (write (target_file, &section_base, sizeof (section_base))
+		      != sizeof (section_base))
+		    error ("cannot write section base");
+		}
+	      section_offset += comp_unit->data_size;
+	    }
+	  else error ("unexpected dst record type");
+	}
+    }
+  
+  if (close (source_file) == -1)
+    error("cannot close source file");
+  if (close (target_file) == -1)
+    error ("cannot close target file");
+}
+
+
+static
+CopyData (target_file, source_file, total_byte_count)
+     int target_file, source_file;
+     long total_byte_count;
+{
+  unsigned char buffer[4096];
+  long byte_count;
+  while (total_byte_count > 0)
+    {
+      if (total_byte_count > sizeof (buffer))
+	byte_count = sizeof (buffer);
+      else byte_count = total_byte_count;
+      if (read (source_file, buffer, byte_count) != byte_count)
+	error ("cannot read data");
+      if (write (target_file, buffer, byte_count) != byte_count)
+	error ("cannot write data");
+      total_byte_count -= byte_count;
+    }
+}