1 /* SOM object file format.
2 Copyright (C) 1993 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as
8 published by the Free Software Foundation; either version 2,
9 or (at your option) any later version.
11 GAS is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
14 the GNU General Public License for more details.
16 You should have received a copy of the GNU General Public
17 License along with GAS; see the file COPYING. If not, write
18 to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
20 Written by the Center for Software Science at the University of Utah
21 and by Cygnus Support. */
25 #include "aout/stab_gnu.h"
28 /* SOM does not need any pseudo-ops. */
30 const pseudo_typeS obj_pseudo_table[] =
35 static int version_seen = 0;
36 static int copyright_seen = 0;
39 void obj_read_begin_hook () {}
41 /* Handle a .version directive. */
44 obj_som_version (unused)
51 as_bad ("Only one .version pseudo-op per file!");
52 ignore_rest_of_line ();
57 if (*input_line_pointer == '\"')
59 version = input_line_pointer;
61 while (is_a_char (next_char_of_string ()))
63 c = *input_line_pointer;
64 *input_line_pointer = '\000';
68 as_bad ("Expected quoted string");
69 ignore_rest_of_line ();
74 bfd_som_attach_aux_hdr (stdoutput, VERSION_AUX_ID, version);
75 *input_line_pointer = c;
76 demand_empty_rest_of_line ();
79 /* Handle a .copyright directive. This probably isn't complete, but
80 it's of dubious value anyway and (IMHO) not worth the time to finish.
81 If you care about copyright strings that much, you fix it. */
84 obj_som_copyright (unused)
91 as_bad ("Only one .copyright pseudo-op per file!");
92 ignore_rest_of_line ();
97 if (*input_line_pointer == '\"')
99 copyright = input_line_pointer;
100 ++input_line_pointer;
101 while (is_a_char (next_char_of_string ()))
103 c = *input_line_pointer;
104 *input_line_pointer = '\000';
108 as_bad ("Expected quoted string");
109 ignore_rest_of_line ();
114 bfd_som_attach_aux_hdr (stdoutput, COPYRIGHT_AUX_ID, copyright);
115 *input_line_pointer = c;
116 demand_empty_rest_of_line ();
119 /* Perform any initialization necessary for stabs support.
121 For SOM we need to create the space which will contain the
122 two stabs subspaces. Additionally we need to set up the
123 space/subspace relationships and set space/subspace attributes
124 which BFD does not understand. */
127 obj_som_init_stab_section (seg)
130 segT saved_seg = now_seg;
132 subsegT saved_subseg = now_subseg;
136 /* Make the space which will contain the debug subspaces. */
137 space = bfd_make_section_old_way (stdoutput, "$GDB_DEBUG$");
139 /* Set SOM specific attributes for the space. In particular we set
140 the space "defined", "private", "sort_key", and "spnum" values.
142 Due to a bug in pxdb (called by hpux linker), the sort keys
143 of the various stabs spaces/subspaces need to be "small". We
144 reserve range 72/73 which appear to work well. */
145 obj_set_section_attributes (space, 1, 1, 72, 2);
146 bfd_set_section_alignment (stdoutput, space, 2);
148 /* Set the containing space for both stab sections to be $GDB_DEBUG$
149 (just created above). Also set some attributes which BFD does
150 not understand. In particular, access bits, sort keys, and load
152 obj_set_subsection_attributes (seg, space, 0x1f, 73, 0);
153 bfd_set_section_alignment (stdoutput, seg, 2);
155 /* Make some space for the first stab entry which is special.
156 It contains information about the length of this file's
157 stab string and the like. Using it avoids the need to
158 relocate the stab strings.
160 The $GDB_STRINGS$ space will be created as a side effect of
161 the call to get_stab_string_offset. */
163 as_where (&file, (unsigned int *) NULL);
164 stroff = get_stab_string_offset (file, "$GDB_STRINGS$");
166 md_number_to_chars (p, stroff, 4);
167 seg_info (seg)->stabu.p = p;
169 /* Set the containing space for both stab sections to be $GDB_DEBUG$
170 (just created above). Also set some attributes which BFD does
171 not understand. In particular, access bits, sort keys, and load
173 seg = bfd_get_section_by_name (stdoutput, "$GDB_STRINGS$");
174 obj_set_subsection_attributes (seg, space, 0x1f, 72, 0);
175 bfd_set_section_alignment (stdoutput, seg, 2);
177 subseg_set (saved_seg, saved_subseg);
180 /* Fill in the counts in the first entry in a .stabs section. */
183 adjust_stab_sections (abfd, sec, xxx)
192 if (strcmp ("$GDB_SYMBOLS$", sec->name))
195 strsec = bfd_get_section_by_name (abfd, "$GDB_STRINGS$");
197 strsz = bfd_section_size (abfd, strsec);
200 nsyms = bfd_section_size (abfd, sec) / 12 - 1;
202 p = seg_info (sec)->stabu.p;
205 bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6);
206 bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8);
210 /* Adjust the VMA address for each $CODE$ subspace. */
212 adjust_code_sections (abfd, sec, xxx)
217 static unsigned size_so_far = 0;
219 if (strcmp (sec->name, "$CODE$"))
222 bfd_set_section_vma (stdoutput, sec, size_so_far);
223 size_so_far += bfd_get_section_size_before_reloc (sec);
227 /* Called late in the asssembly phase to adjust the special
228 stab entry and to set the starting address for each code subspace. */
233 bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0);
235 See comment in tc-hppa.c:pa_proc about GDB lossage
236 bfd_map_over_sections (stdoutput, adjust_code_sections, (PTR) 0);