1 # This shell script emits a C file. -*- C -*-
2 # Copyright 2000, 2001, 2003, 2007 Free Software Foundation, Inc.
3 # Written by Michael Sokolov <msokolov@ivan.Harhan.ORG>, based on armelf.em
5 # This file is part of the GNU Binutils.
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program; if not, write to the Free Software
19 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 # This file is sourced from elf32.em, and defines some extra routines for m68k
24 # embedded systems using ELF and for some other systems using m68k ELF. While
25 # it is sourced from elf32.em for all m68k ELF configurations, here we include
26 # only the features we want depending on the configuration.
30 echo "#define SUPPORT_EMBEDDED_RELOCS" >>e${EMULATION_NAME}.c
36 #ifdef SUPPORT_EMBEDDED_RELOCS
37 static void check_sections (bfd *, asection *, void *);
40 /* This function is run after all the input files have been opened. */
43 m68k_elf_after_open (void)
45 /* Call the standard elf routine. */
46 gld${EMULATION_NAME}_after_open ();
48 #ifdef SUPPORT_EMBEDDED_RELOCS
49 if (command_line.embedded_relocs
50 && (! link_info.relocatable))
54 /* In the embedded relocs mode we create a .emreloc section for each
55 input file with a nonzero .data section. The BFD backend will fill in
56 these sections with magic numbers which can be used to relocate the
57 data section at run time. */
58 for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
62 /* As first-order business, make sure that each input BFD is either
63 COFF or ELF. We need to call a special BFD backend function to
64 generate the embedded relocs, and we have such functions only for
66 if (bfd_get_flavour (abfd) != bfd_target_coff_flavour
67 && bfd_get_flavour (abfd) != bfd_target_elf_flavour)
68 einfo ("%F%B: all input objects must be COFF or ELF for --embedded-relocs\n");
70 datasec = bfd_get_section_by_name (abfd, ".data");
72 /* Note that we assume that the reloc_count field has already
73 been set up. We could call bfd_get_reloc_upper_bound, but
74 that returns the size of a memory buffer rather than a reloc
75 count. We do not want to call bfd_canonicalize_reloc,
76 because although it would always work it would force us to
77 read in the relocs into BFD canonical form, which would waste
78 a significant amount of time and memory. */
79 if (datasec != NULL && datasec->reloc_count > 0)
83 relsec = bfd_make_section (abfd, ".emreloc");
85 || ! bfd_set_section_flags (abfd, relsec,
90 || ! bfd_set_section_alignment (abfd, relsec, 2)
91 || ! bfd_set_section_size (abfd, relsec,
92 datasec->reloc_count * 12))
93 einfo ("%F%B: can not create .emreloc section: %E\n");
96 /* Double check that all other data sections are empty, as is
97 required for embedded PIC code. */
98 bfd_map_over_sections (abfd, check_sections, datasec);
101 #endif /* SUPPORT_EMBEDDED_RELOCS */
104 #ifdef SUPPORT_EMBEDDED_RELOCS
105 /* Check that of the data sections, only the .data section has
106 relocs. This is called via bfd_map_over_sections. */
109 check_sections (bfd *abfd, asection *sec, void *datasec)
111 if ((bfd_get_section_flags (abfd, sec) & SEC_DATA)
113 && sec->reloc_count != 0)
114 einfo ("%B%X: section %s has relocs; can not use --embedded-relocs\n",
115 abfd, bfd_get_section_name (abfd, sec));
118 #endif /* SUPPORT_EMBEDDED_RELOCS */
120 /* This function is called after the section sizes and offsets have
124 m68k_elf_after_allocation (void)
126 /* Call the standard elf routine. */
127 after_allocation_default ();
129 #ifdef SUPPORT_EMBEDDED_RELOCS
130 if (command_line.embedded_relocs
131 && (! link_info.relocatable))
135 /* If we are generating embedded relocs, call a special BFD backend
136 routine to do the work. */
137 for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
139 asection *datasec, *relsec;
142 datasec = bfd_get_section_by_name (abfd, ".data");
144 if (datasec == NULL || datasec->reloc_count == 0)
147 relsec = bfd_get_section_by_name (abfd, ".emreloc");
148 ASSERT (relsec != NULL);
150 if (bfd_get_flavour (abfd) == bfd_target_coff_flavour)
152 if (! bfd_m68k_coff_create_embedded_relocs (abfd, &link_info,
157 einfo ("%B%X: can not create runtime reloc information: %E\n",
160 einfo ("%X%B: can not create runtime reloc information: %s\n",
164 else if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
166 if (! bfd_m68k_elf32_create_embedded_relocs (abfd, &link_info,
171 einfo ("%B%X: can not create runtime reloc information: %E\n",
174 einfo ("%X%B: can not create runtime reloc information: %s\n",
182 #endif /* SUPPORT_EMBEDDED_RELOCS */
187 # We have our own after_open and after_allocation functions, but they call
188 # the standard routines, so give them a different name.
189 LDEMUL_AFTER_OPEN=m68k_elf_after_open
190 LDEMUL_AFTER_ALLOCATION=m68k_elf_after_allocation