[Emacs-diffs] Changes to src/unexapollo.c

[Dan Nicolaescu]

CVSROOT:        /cvsroot/emacs
Module name:    emacs
Changes by:     Dan Nicolaescu <dann>   08/01/06 00:56:56

Index: src/unexapollo.c
===================================================================
RCS file: src/unexapollo.c
diff -N src/unexapollo.c
--- src/unexapollo.c    26 Jul 2007 05:27:57 -0000      1.8
+++ /dev/null   1 Jan 1970 00:00:00 -0000
@@ -1,301 +0,0 @@
-/* unexapollo.c -- COFF File UNEXEC for GNU Emacs on Apollo SR10.x
-   Copyright (C) 1988, 1994, 2001, 2002, 2003, 2004,
-                 2005, 2006, 2007  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 3, 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., 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA.  */
-
-/* Written by Leonard N. Zubkoff.  */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#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;
-    }
-}
-
-/* arch-tag: 783ebbdf-7d26-4df8-9469-17a1747dce96
-   (do not change this comment) */