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[xemacs-hg @ 2002-05-16 13:30:23 by ben] ui fixes for things that were bothering me bytecode.c, editfns.c, lisp.h, lread.c: Fix save-restriction to use markers rather than pseudo-markers (integers representing the amount of text on either side of the region). That way, all inserts are handled correctly, not just those inside old restriction. Add buffer argument to save_restriction_save(). process.c: Clean up very dirty and kludgy code that outputs into a buffer -- use proper unwind protects, etc. font-lock.c: Do save-restriction/widen around the function -- otherwise, incorrect results will ensue when a buffer has been narrowed before a call to e.g. `buffer-syntactic-context' -- something that happens quite often. fileio.c: Look for a handler for make-temp-name. window.c, winslots.h: Try to solve this annoying problem: have two frames displaying the buffer, in different places; in one, temporarily switch away to another buffer and then back -- and you've lost your position; it's reset to the other one in the other frame. My current solution involves window-level caches of buffers and points (also a cache for window-start); when set-window-buffer is called, it looks to see if the buffer was previously visited in the window, and if so, uses the most recent point at that time. (It's a marker, so it handles changes.) #### Note: It could be argued that doing it on the frame level would be better -- e.g. if you visit a buffer temporarily through a grep, and then go back to that buffer, you presumably want the grep's position rather than some previous position provided everything was in the same frame, even though the grep was in another window in the frame. However, doing it on the frame level fails when you have two windows on the same frame. Perhaps we keep both a window and a frame cache, and use the frame cache if there are no other windows on the frame showing the buffer, else the window's cache? This is probably something to be configurable using a specifier. Suggestions please please please? window.c: Clean up a bit code that deals with the annoyance of window-point vs. point. dialog.el: Function to ask a multiple-choice question, automatically choosing a dialog box or minibuffer representation as necessary. Generalized version of yes-or-no-p, y-or-n-p. files.el: Use get-user-response to ask "yes/no/diff" question when recovering. "diff" means that a diff is displayed between the current file and the autosave. (Converts/deconverts escape-quoted as necessary. No more complaints from you, Mr. Turnbull!) One known problem: when a dialog is used, it's modal, so you can't scroll the diff. Will fix soon. lisp-mode.el: If we're filling a string, don't treat semicolon as a comment, which would give very unfriendly results. Uses `buffer-syntactic-context'. simple.el: all changes back to the beginning. (Useful if you've saved the file in the middle of the changes.) simple.el: Add option kill-word-into-kill-ring, which controls whether words deleted with kill-word, backward-kill-word, etc. are "cut" into the kill ring, or "cleared" into nothingness. (My preference is the latter, by far. I'd almost go so far as suggesting we make it the default, as you can always select a word and then cut it if you want it cut.) menubar-items.el: Add option corresponding to kill-word-into-kill-ring.
author ben
date Thu, 16 May 2002 13:30:58 +0000
parents 023b83f4e54b
children
line wrap: on
line source

/* unexapollo.c -- COFF File UNEXEC for XEmacs on Apollo SR10.x
   Copyright (C) 1988, 1994 Free Software Foundation, Inc.

This file is part of XEmacs.

XEmacs 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.

XEmacs 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 XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Synched up with: FSF 19.31. */

/* 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)
    signal_error (Qfile_error, "cannot open source file for input", Qunbound);
  /* Read the File Header. */
  if (read (source_file, &file_header, sizeof (file_header)) != sizeof (file_header))
    signal_error (Qfile_error, "cannot read file header", Qunbound);
  
  /* Read the Domain Header. */
  if (read (source_file, &domain_header, sizeof (domain_header))
      != sizeof (domain_header))
    signal_error (Qfile_error, "cannot read domain header", Qunbound);
  /* Read the Section Headers. */
  sections =
    (struct scnhdr *) malloc (file_header.f_nscns*sizeof (struct scnhdr));
  if (sections == (struct scnhdr *) 0)
    out_of_memory ("cannot allocate section header storage", Qunbound);
  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))
    signal_error (Qfile_error, "cannot read section headers", Qunbound);
  /* 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)
	  signal_error (Qio_error, ".rwdi section needs relocation - cannot dump Emacs", Qunbound);
	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)
    signal_error (Qfile_error, "cannot open target file for output", Qunbound);
  /* Write the File Header. */
  if (write (target_file, &file_header, sizeof (file_header)) != sizeof (file_header))
    signal_error (Qfile_error, "cannot write file header", Qunbound);
  /* Write the Domain Header. */
  if (write (target_file, &domain_header, sizeof (domain_header))
      != sizeof (domain_header))
    signal_error (Qfile_error, "cannot write domain header", Qunbound);
  /* Write the Section Headers. */
  if (write (target_file, sections, file_header.f_nscns*sizeof (struct scnhdr))
      != file_header.f_nscns*sizeof (struct scnhdr))
    signal_error (Qfile_error, "cannot write section headers", Qunbound);
  /* 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)
    signal_error (Qfile_error, "cannot write new data section", Qunbound);
  
  /* 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)
    signal_error (Qfile_error, "cannot seek past data section", Qunbound);
  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)
    signal_error (Qfile_error, "cannot seek past .rwdi section", Qunbound);
  while ((byte_count = read (source_file, buffer, sizeof (buffer))) > 0)
    if (write (target_file, buffer, byte_count) != byte_count)
      signal_error (Qfile_error, "cannot write data", Qunbound);
  /* 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)
	  signal_error (Qfile_error, "cannot seek to relocation info", Qunbound);
	if (read (source_file, &reloc_entry, sizeof (reloc_entry))
	    != sizeof (reloc_entry))
	  signal_error (Qfile_error, "cannot read reloc entry", Qunbound);
	if (lseek (source_file, reloc_entry.r_vaddr-section->s_vaddr
		   +section->s_scnptr, L_SET) == -1)
	  signal_error (Qfile_error, "cannot seek to data element", Qunbound);
	if (lseek (target_file, reloc_entry.r_vaddr-section->s_vaddr
		   +section->s_scnptr, L_SET) == -1)
	  signal_error (Qfile_error, "cannot seek to data element", Qunbound);
	if (read (source_file, buffer, 4) != 4)
	  signal_error (Qfile_error, "cannot read data element", Qunbound);
	if (write (target_file, buffer, 4) != 4)
	  signal_error (Qfile_error, "cannot write data element", Qunbound);
      }
  
  /* 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)
	    signal_error (Qfile_error, "cannot seek to comp unit record", Qunbound);
	  /* Handle pad records before the comp unit record. */
	  if (read (target_file, &dst_record, DST_RECORD_HDR_SIZE)
	      != DST_RECORD_HDR_SIZE)
	    signal_error (Qfile_error, "cannot read dst record tag", Qunbound);
	  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))
		signal_error (Qfile_error, "cannot read comp unit record", Qunbound);
	      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)
		signal_error (Qfile_error, "cannot seek to section table", Qunbound);
	      if (read (target_file, &number_of_sections, sizeof (number_of_sections))
		  != sizeof (number_of_sections))
		signal_error (Qfile_error, "cannot read section table size", Qunbound);
	      for (i = 0; i < number_of_sections; i++)
		{
		  if (read (target_file, &section_base, sizeof (section_base))
		      != sizeof (section_base))
		    signal_error (Qfile_error, "cannot read section base value", Qunbound);
		  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)
		    signal_error (Qfile_error, "cannot seek to section base value", Qunbound);
		  if (write (target_file, &section_base, sizeof (section_base))
		      != sizeof (section_base))
		    signal_error (Qfile_error, "cannot write section base", Qunbound);
		}
	      section_offset += comp_unit->data_size;
	    }
	  else signal_error (Qfile_error, "unexpected dst record type", Qunbound);
	}
    }
  
  if (close (source_file) == -1)
    signal_error (Qfile_error, "cannot close source file", Qunbound);
  if (close (target_file) == -1)
    signal_error (Qfile_error, "cannot close target file", Qunbound);
}


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)
	signal_error (Qfile_error, "cannot read data", Qunbound);
      if (write (target_file, buffer, byte_count) != byte_count)
	signal_error (Qfile_error, "cannot write data", Qunbound);
      total_byte_count -= byte_count;
    }
}