1# This shell script emits a C file. -*- C -*-
2# It does some substitutions.
3fragment <<EOF
4/* This file is is generated by a shell script.  DO NOT EDIT! */
5
6/* Handle embedded relocs for m68k.
7   Copyright (C) 2000-2016 Free Software Foundation, Inc.
8   Written by Michael Sokolov <msokolov@ivan.Harhan.ORG>, based on generic.em
9   by Steve Chamberlain <steve@cygnus.com>, embedded relocs code based on
10   mipsecoff.em by Ian Lance Taylor <ian@cygnus.com> (now removed).
11
12   This file is part of the GNU Binutils.
13
14   This program is free software; you can redistribute it and/or modify
15   it under the terms of the GNU General Public License as published by
16   the Free Software Foundation; either version 3 of the License, or
17   (at your option) any later version.
18
19   This program is distributed in the hope that it will be useful,
20   but WITHOUT ANY WARRANTY; without even the implied warranty of
21   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22   GNU General Public License for more details.
23
24   You should have received a copy of the GNU General Public License
25   along with this program; if not, write to the Free Software
26   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
27   MA 02110-1301, USA.  */
28
29#define TARGET_IS_${EMULATION_NAME}
30
31#include "sysdep.h"
32#include "bfd.h"
33#include "bfdlink.h"
34
35#include "ld.h"
36#include "ldmain.h"
37#include "ldexp.h"
38#include "ldlang.h"
39#include "ldfile.h"
40#include "ldemul.h"
41#include "ldmisc.h"
42
43static void check_sections (bfd *, asection *, void *);
44
45static void
46gld${EMULATION_NAME}_before_parse (void)
47{
48#ifndef TARGET_			/* I.e., if not generic.  */
49  ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
50#endif /* not TARGET_ */
51}
52
53/* This function is run after all the input files have been opened.
54   We create a .emreloc section for each input file with a non zero
55   .data section.  The BFD backend will fill in these sections with
56   magic numbers which can be used to relocate the data section at run
57   time.  */
58
59static void
60gld${EMULATION_NAME}_after_open (void)
61{
62  bfd *abfd;
63
64  after_open_default ();
65
66  if (! command_line.embedded_relocs
67      || bfd_link_relocatable (&link_info))
68    return;
69
70  for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next)
71    {
72      asection *datasec;
73
74      /* As first-order business, make sure that each input BFD is COFF. It
75         better be, as we are directly calling a COFF backend function.  */
76      if (bfd_get_flavour (abfd) != bfd_target_coff_flavour)
77	einfo ("%F%B: all input objects must be COFF for --embedded-relocs\n");
78
79      datasec = bfd_get_section_by_name (abfd, ".data");
80
81      /* Note that we assume that the reloc_count field has already
82         been set up.  We could call bfd_get_reloc_upper_bound, but
83         that returns the size of a memory buffer rather than a reloc
84         count.  We do not want to call bfd_canonicalize_reloc,
85         because although it would always work it would force us to
86         read in the relocs into BFD canonical form, which would waste
87         a significant amount of time and memory.  */
88      if (datasec != NULL && datasec->reloc_count > 0)
89	{
90	  asection *relsec;
91
92	  relsec = bfd_make_section_with_flags (abfd, ".emreloc",
93						(SEC_ALLOC
94						 | SEC_LOAD
95						 | SEC_HAS_CONTENTS
96						 | SEC_IN_MEMORY));
97	  if (relsec == NULL
98	      || ! bfd_set_section_alignment (abfd, relsec, 2)
99	      || ! bfd_set_section_size (abfd, relsec,
100					 datasec->reloc_count * 12))
101	    einfo ("%F%B: can not create .emreloc section: %E\n");
102	}
103
104      /* Double check that all other data sections are empty, as is
105         required for embedded PIC code.  */
106      bfd_map_over_sections (abfd, check_sections, datasec);
107    }
108}
109
110/* Check that of the data sections, only the .data section has
111   relocs.  This is called via bfd_map_over_sections.  */
112
113static void
114check_sections (bfd *abfd, asection *sec, void *datasec)
115{
116  if ((bfd_get_section_flags (abfd, sec) & SEC_DATA)
117      && sec != datasec
118      && sec->reloc_count != 0)
119    einfo ("%B%X: section %s has relocs; can not use --embedded-relocs\n",
120	   abfd, bfd_get_section_name (abfd, sec));
121}
122
123/* This function is called after the section sizes and offsets have
124   been set.  If we are generating embedded relocs, it calls a special
125   BFD backend routine to do the work.  */
126
127static void
128gld${EMULATION_NAME}_after_allocation (void)
129{
130  bfd *abfd;
131
132  if (! command_line.embedded_relocs
133      || bfd_link_relocatable (&link_info))
134    return;
135
136  for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next)
137    {
138      asection *datasec, *relsec;
139      char *errmsg;
140
141      datasec = bfd_get_section_by_name (abfd, ".data");
142
143      if (datasec == NULL || datasec->reloc_count == 0)
144	continue;
145
146      relsec = bfd_get_section_by_name (abfd, ".emreloc");
147      ASSERT (relsec != NULL);
148
149      if (! bfd_m68k_coff_create_embedded_relocs (abfd, &link_info,
150						   datasec, relsec,
151						   &errmsg))
152	{
153	  if (errmsg == NULL)
154	    einfo ("%B%X: can not create runtime reloc information: %E\n",
155		   abfd);
156	  else
157	    einfo ("%X%B: can not create runtime reloc information: %s\n",
158		   abfd, errmsg);
159	}
160    }
161}
162
163static char *
164gld${EMULATION_NAME}_get_script (int *isfile)
165EOF
166
167if test x"$COMPILE_IN" = xyes
168then
169# Scripts compiled in.
170
171# sed commands to quote an ld script as a C string.
172sc="-f stringify.sed"
173
174fragment <<EOF
175{
176  *isfile = 0;
177
178  if (bfd_link_relocatable (&link_info) && config.build_constructors)
179    return
180EOF
181sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
182echo '  ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
183sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
184echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
185sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
186echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
187sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
188echo '  ; else return'                                 >> e${EMULATION_NAME}.c
189sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
190echo '; }'                                             >> e${EMULATION_NAME}.c
191
192else
193# Scripts read from the filesystem.
194
195fragment <<EOF
196{
197  *isfile = 1;
198
199  if (bfd_link_relocatable (&link_info) && config.build_constructors)
200    return "ldscripts/${EMULATION_NAME}.xu";
201  else if (bfd_link_relocatable (&link_info))
202    return "ldscripts/${EMULATION_NAME}.xr";
203  else if (!config.text_read_only)
204    return "ldscripts/${EMULATION_NAME}.xbn";
205  else if (!config.magic_demand_paged)
206    return "ldscripts/${EMULATION_NAME}.xn";
207  else
208    return "ldscripts/${EMULATION_NAME}.x";
209}
210EOF
211
212fi
213
214fragment <<EOF
215
216struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
217{
218  gld${EMULATION_NAME}_before_parse,
219  syslib_default,
220  hll_default,
221  after_parse_default,
222  gld${EMULATION_NAME}_after_open,
223  gld${EMULATION_NAME}_after_allocation,
224  set_output_arch_default,
225  ldemul_default_target,
226  before_allocation_default,
227  gld${EMULATION_NAME}_get_script,
228  "${EMULATION_NAME}",
229  "${OUTPUT_FORMAT}",
230  finish_default,
231  NULL,	/* create output section statements */
232  NULL,	/* open dynamic archive */
233  NULL,	/* place orphan */
234  NULL,	/* set symbols */
235  NULL,	/* parse args */
236  NULL,	/* add_options */
237  NULL,	/* handle_option */
238  NULL,	/* unrecognized file */
239  NULL,	/* list options */
240  NULL,	/* recognized file */
241  NULL,	/* find_potential_libraries */
242  NULL,	/* new_vers_pattern */
243  NULL	/* extra_map_file_text */
244};
245EOF
246