228 lines
6.3 KiB
C
228 lines
6.3 KiB
C
/* SOM object file format.
|
|
Copyright (C) 1993 Free Software Foundation, Inc.
|
|
|
|
This file is part of GAS, the GNU Assembler.
|
|
|
|
GAS 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.
|
|
|
|
GAS 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 GAS; see the file COPYING. If not, write
|
|
to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
Written by the Center for Software Science at the University of Utah
|
|
and by Cygnus Support. */
|
|
|
|
#include "as.h"
|
|
#include "subsegs.h"
|
|
#include "aout/stab_gnu.h"
|
|
#include "obstack.h"
|
|
|
|
/* SOM does not need any pseudo-ops. */
|
|
|
|
const pseudo_typeS obj_pseudo_table[] =
|
|
{
|
|
{NULL}
|
|
};
|
|
|
|
static int version_seen = 0;
|
|
static int copyright_seen = 0;
|
|
|
|
/* Unused by SOM. */
|
|
void obj_read_begin_hook () {}
|
|
|
|
/* Handle a .version directive. */
|
|
|
|
void
|
|
obj_som_version (unused)
|
|
int unused;
|
|
{
|
|
char *version, c;
|
|
|
|
if (version_seen)
|
|
{
|
|
as_bad ("Only one .version pseudo-op per file!");
|
|
ignore_rest_of_line ();
|
|
return;
|
|
}
|
|
|
|
SKIP_WHITESPACE ();
|
|
if (*input_line_pointer == '\"')
|
|
{
|
|
version = input_line_pointer;
|
|
++input_line_pointer;
|
|
while (is_a_char (next_char_of_string ()))
|
|
;
|
|
c = *input_line_pointer;
|
|
*input_line_pointer = '\000';
|
|
}
|
|
else
|
|
{
|
|
as_bad ("Expected quoted string");
|
|
ignore_rest_of_line ();
|
|
return;
|
|
}
|
|
|
|
version_seen = 1;
|
|
if (bfd_som_attach_aux_hdr (stdoutput, VERSION_AUX_ID, version) == false)
|
|
{
|
|
bfd_perror (stdoutput->filename);
|
|
as_perror ("FATAL: Attaching version header %s", stdoutput->filename);
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
*input_line_pointer = c;
|
|
demand_empty_rest_of_line ();
|
|
}
|
|
|
|
/* Handle a .copyright directive. This probably isn't complete, but
|
|
it's of dubious value anyway and (IMHO) not worth the time to finish.
|
|
If you care about copyright strings that much, you fix it. */
|
|
|
|
void
|
|
obj_som_copyright (unused)
|
|
int unused;
|
|
{
|
|
char *copyright, c;
|
|
|
|
if (copyright_seen)
|
|
{
|
|
as_bad ("Only one .copyright pseudo-op per file!");
|
|
ignore_rest_of_line ();
|
|
return;
|
|
}
|
|
|
|
SKIP_WHITESPACE ();
|
|
if (*input_line_pointer == '\"')
|
|
{
|
|
copyright = input_line_pointer;
|
|
++input_line_pointer;
|
|
while (is_a_char (next_char_of_string ()))
|
|
;
|
|
c = *input_line_pointer;
|
|
*input_line_pointer = '\000';
|
|
}
|
|
else
|
|
{
|
|
as_bad ("Expected quoted string");
|
|
ignore_rest_of_line ();
|
|
return;
|
|
}
|
|
|
|
copyright_seen = 1;
|
|
if (bfd_som_attach_aux_hdr (stdoutput, COPYRIGHT_AUX_ID, copyright) == false)
|
|
{
|
|
bfd_perror (stdoutput->filename);
|
|
as_perror ("FATAL: Attaching copyright header %s", stdoutput->filename);
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
*input_line_pointer = c;
|
|
demand_empty_rest_of_line ();
|
|
}
|
|
|
|
/* Perform any initialization necessary for stabs support.
|
|
|
|
For SOM we need to create the space which will contain the
|
|
two stabs subspaces. Additionally we need to set up the
|
|
space/subspace relationships and set space/subspace attributes
|
|
which BFD does not understand. */
|
|
|
|
void
|
|
obj_som_init_stab_section (seg)
|
|
segT seg;
|
|
{
|
|
segT saved_seg = now_seg;
|
|
segT space;
|
|
subsegT saved_subseg = now_subseg;
|
|
char *p, *file;
|
|
unsigned int stroff;
|
|
|
|
/* Make the space which will contain the debug subspaces. */
|
|
space = bfd_make_section_old_way (stdoutput, "$GDB_DEBUG$");
|
|
|
|
/* Set SOM specific attributes for the space. In particular we set
|
|
the space "defined", "private", "sort_key", and "spnum" values.
|
|
|
|
Due to a bug in pxdb (called by hpux linker), the sort keys
|
|
of the various stabs spaces/subspaces need to be "small". We
|
|
reserve range 72/73 which appear to work well. */
|
|
obj_set_section_attributes (space, 1, 1, 72, 2);
|
|
bfd_set_section_alignment (stdoutput, space, 2);
|
|
|
|
/* Set the containing space for both stab sections to be $GDB_DEBUG$
|
|
(just created above). Also set some attributes which BFD does
|
|
not understand. In particular, access bits, sort keys, and load
|
|
quadrant. */
|
|
obj_set_subsection_attributes (seg, space, 0x1f, 73, 0);
|
|
bfd_set_section_alignment (stdoutput, seg, 2);
|
|
|
|
/* Make some space for the first special stab entry and zero the memory.
|
|
It contains information about the length of this file's
|
|
stab string and the like. Using it avoids the need to
|
|
relocate the stab strings.
|
|
|
|
The $GDB_STRINGS$ space will be created as a side effect of
|
|
the call to get_stab_string_offset. */
|
|
p = frag_more (12);
|
|
memset (p, 0, 12);
|
|
as_where (&file, (unsigned int *) NULL);
|
|
stroff = get_stab_string_offset (file, "$GDB_STRINGS$");
|
|
know (stroff == 1);
|
|
md_number_to_chars (p, stroff, 4);
|
|
seg_info (seg)->stabu.p = p;
|
|
|
|
/* Set the containing space for both stab sections to be $GDB_DEBUG$
|
|
(just created above). Also set some attributes which BFD does
|
|
not understand. In particular, access bits, sort keys, and load
|
|
quadrant. */
|
|
seg = bfd_get_section_by_name (stdoutput, "$GDB_STRINGS$");
|
|
obj_set_subsection_attributes (seg, space, 0x1f, 72, 0);
|
|
bfd_set_section_alignment (stdoutput, seg, 2);
|
|
|
|
subseg_set (saved_seg, saved_subseg);
|
|
}
|
|
|
|
/* Fill in the counts in the first entry in a .stabs section. */
|
|
|
|
static void
|
|
adjust_stab_sections (abfd, sec, xxx)
|
|
bfd *abfd;
|
|
asection *sec;
|
|
PTR xxx;
|
|
{
|
|
asection *strsec;
|
|
char *p;
|
|
int strsz, nsyms;
|
|
|
|
if (strcmp ("$GDB_SYMBOLS$", sec->name))
|
|
return;
|
|
|
|
strsec = bfd_get_section_by_name (abfd, "$GDB_STRINGS$");
|
|
if (strsec)
|
|
strsz = bfd_section_size (abfd, strsec);
|
|
else
|
|
strsz = 0;
|
|
nsyms = bfd_section_size (abfd, sec) / 12 - 1;
|
|
|
|
p = seg_info (sec)->stabu.p;
|
|
assert (p != 0);
|
|
|
|
bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6);
|
|
bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8);
|
|
}
|
|
|
|
/* Called late in the asssembly phase to adjust the special
|
|
stab entry and to set the starting address for each code subspace. */
|
|
|
|
void
|
|
som_frob_file ()
|
|
{
|
|
bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0);
|
|
}
|