1# This shell script emits a C file. -*- C -*-
2# It does some substitutions.
3if [ -z "$MACHINE" ]; then
4  OUTPUT_ARCH=${ARCH}
5else
6  OUTPUT_ARCH=${ARCH}:${MACHINE}
7fi
8cat >e${EMULATION_NAME}.c <<EOF
9/* This file is is generated by a shell script.  DO NOT EDIT! */
10
11/* Linux a.out emulation code for ${EMULATION_NAME}
12   Copyright 1991, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002, 2003, 2004
13   Free Software Foundation, Inc.
14   Written by Steve Chamberlain <sac@cygnus.com>
15   Linux support by Eric Youngdale <ericy@cais.cais.com>
16
17This file is part of GLD, the Gnu Linker.
18
19This program is free software; you can redistribute it and/or modify
20it under the terms of the GNU General Public License as published by
21the Free Software Foundation; either version 2 of the License, or
22(at your option) any later version.
23
24This program is distributed in the hope that it will be useful,
25but WITHOUT ANY WARRANTY; without even the implied warranty of
26MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
27GNU General Public License for more details.
28
29You should have received a copy of the GNU General Public License
30along with this program; if not, write to the Free Software
31Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
32
33#define TARGET_IS_${EMULATION_NAME}
34
35#include "bfd.h"
36#include "sysdep.h"
37#include "bfdlink.h"
38
39#include "ld.h"
40#include "ldmain.h"
41#include "ldmisc.h"
42#include "ldexp.h"
43#include "ldlang.h"
44#include "ldfile.h"
45#include "ldemul.h"
46
47static void
48gld${EMULATION_NAME}_before_parse (void)
49{
50  ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
51  config.dynamic_link = TRUE;
52  config.has_shared = TRUE;
53}
54
55/* Try to open a dynamic archive.  This is where we know that Linux
56   dynamic libraries have an extension of .sa.  */
57
58static bfd_boolean
59gld${EMULATION_NAME}_open_dynamic_archive
60  (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
61{
62  char *string;
63
64  if (! entry->is_archive)
65    return FALSE;
66
67  string = (char *) xmalloc (strlen (search->name)
68			     + strlen (entry->filename)
69			     + strlen (arch)
70			     + sizeof "/lib.sa");
71
72  sprintf (string, "%s/lib%s%s.sa", search->name, entry->filename, arch);
73
74  if (! ldfile_try_open_bfd (string, entry))
75    {
76      free (string);
77      return FALSE;
78    }
79
80  entry->filename = string;
81
82  return TRUE;
83}
84
85/* This is called by the create_output_section_statements routine via
86   lang_for_each_statement.  It locates any address assignment to
87   .text, and modifies it to include the size of the headers.  This
88   causes -Ttext to mean the starting address of the header, rather
89   than the starting address of .text, which is compatible with other
90   Linux tools.  */
91
92static void
93gld${EMULATION_NAME}_find_address_statement (lang_statement_union_type *s)
94{
95  if (s->header.type == lang_address_statement_enum
96      && strcmp (s->address_statement.section_name, ".text") == 0)
97    {
98      ASSERT (s->address_statement.address->type.node_class == etree_value);
99      s->address_statement.address->value.value += 0x20;
100    }
101}
102
103/* This is called before opening the input BFD's.  */
104
105static void
106gld${EMULATION_NAME}_create_output_section_statements (void)
107{
108  lang_for_each_statement (gld${EMULATION_NAME}_find_address_statement);
109}
110
111/* This is called after the sections have been attached to output
112   sections, but before any sizes or addresses have been set.  */
113
114static void
115gld${EMULATION_NAME}_before_allocation (void)
116{
117  if (link_info.relocatable)
118    return;
119
120  /* Let the backend work out the sizes of any sections required by
121     dynamic linking.  */
122  if (! bfd_${EMULATION_NAME}_size_dynamic_sections (output_bfd, &link_info))
123    einfo ("%P%F: failed to set dynamic section sizes: %E\n");
124}
125
126static char *
127gld${EMULATION_NAME}_get_script (int *isfile)
128EOF
129
130if test -n "$COMPILE_IN"
131then
132# Scripts compiled in.
133
134# sed commands to quote an ld script as a C string.
135sc="-f stringify.sed"
136
137cat >>e${EMULATION_NAME}.c <<EOF
138{
139  *isfile = 0;
140
141  if (link_info.relocatable && config.build_constructors)
142    return
143EOF
144sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
145echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
146sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
147echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
148sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
149echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
150sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
151echo '  ; else return'                                 >> e${EMULATION_NAME}.c
152sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
153echo '; }'                                             >> e${EMULATION_NAME}.c
154
155else
156# Scripts read from the filesystem.
157
158cat >>e${EMULATION_NAME}.c <<EOF
159{
160  *isfile = 1;
161
162  if (link_info.relocatable && config.build_constructors)
163    return "ldscripts/${EMULATION_NAME}.xu";
164  else if (link_info.relocatable)
165    return "ldscripts/${EMULATION_NAME}.xr";
166  else if (!config.text_read_only)
167    return "ldscripts/${EMULATION_NAME}.xbn";
168  else if (!config.magic_demand_paged)
169    return "ldscripts/${EMULATION_NAME}.xn";
170  else
171    return "ldscripts/${EMULATION_NAME}.x";
172}
173EOF
174
175fi
176
177cat >>e${EMULATION_NAME}.c <<EOF
178
179struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
180{
181  gld${EMULATION_NAME}_before_parse,
182  syslib_default,
183  hll_default,
184  after_parse_default,
185  after_open_default,
186  after_allocation_default,
187  set_output_arch_default,
188  ldemul_default_target,
189  gld${EMULATION_NAME}_before_allocation,
190  gld${EMULATION_NAME}_get_script,
191  "${EMULATION_NAME}",
192  "${OUTPUT_FORMAT}",
193  NULL,	/* finish */
194  gld${EMULATION_NAME}_create_output_section_statements,
195  gld${EMULATION_NAME}_open_dynamic_archive,
196  NULL,	/* place orphan */
197  NULL,	/* set symbols */
198  NULL,	/* parse args */
199  NULL,	/* add_options */
200  NULL,	/* handle_option */
201  NULL,	/* unrecognized file */
202  NULL,	/* list options */
203  NULL,	/* recognized file */
204  NULL,	/* find_potential_libraries */
205  NULL	/* new_vers_pattern */
206};
207EOF
208