Commit 5303ab61 authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

Initial revision

parent fe0066f5
/* prefix-args.c - echo each argument, prefixed by a string.
Jim Blandy <jimb@occs.cs.oberlin.edu> - 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);
}
/* 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;
}
}
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