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3d3d428f | 1 | # This shell script emits a C file. -*- C -*- |
82704155 | 2 | # Copyright (C) 2007-2019 Free Software Foundation, Inc. |
3d3d428f NC |
3 | # Contributed by M R Swami Reddy <MR.Swami.Reddy@nsc.com> |
4 | # | |
f96b4a7b | 5 | # This file is part of the GNU Binutils. |
3d3d428f NC |
6 | # |
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 | |
f96b4a7b | 9 | # the Free Software Foundation; either version 3 of the License, or |
3d3d428f NC |
10 | # (at your option) any later version. |
11 | # | |
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. | |
16 | # | |
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 | |
f96b4a7b NC |
19 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | # MA 02110-1301, USA. | |
3d3d428f NC |
21 | # |
22 | ||
23 | # This file is sourced from elf32.em, and defines extra cr16-elf | |
24 | # specific routines. | |
25 | # | |
92b93329 | 26 | fragment <<EOF |
3d3d428f NC |
27 | |
28 | #include "ldctor.h" | |
29 | ||
7251ccbf SR |
30 | static void check_sections (bfd *, asection *, void *); |
31 | ||
32 | ||
33 | /* This function is run after all the input files have been opened. */ | |
34 | ||
35 | static void | |
36 | cr16_elf_after_open (void) | |
37 | { | |
38 | /* Call the standard elf routine. */ | |
39 | gld${EMULATION_NAME}_after_open (); | |
40 | ||
d003af55 AM |
41 | if (command_line.embedded_relocs |
42 | && !bfd_link_relocatable (&link_info)) | |
43 | { | |
44 | bfd *abfd; | |
7251ccbf SR |
45 | |
46 | /* In the embedded relocs mode we create a .emreloc section for each | |
47 | input file with a nonzero .data section. The BFD backend will fill in | |
48 | these sections with magic numbers which can be used to relocate the | |
49 | data section at run time. */ | |
c72f2fb2 | 50 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next) |
7251ccbf SR |
51 | { |
52 | asection *datasec; | |
53 | ||
54 | /* As first-order business, make sure that each input BFD is either | |
55 | COFF or ELF. We need to call a special BFD backend function to | |
56 | generate the embedded relocs, and we have such functions only for | |
57 | COFF and ELF. */ | |
58 | if (bfd_get_flavour (abfd) != bfd_target_coff_flavour | |
59 | && bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
df5f2391 | 60 | einfo (_("%F%P: %pB: all input objects must be COFF or ELF " |
d003af55 | 61 | "for --embedded-relocs\n")); |
7251ccbf SR |
62 | |
63 | datasec = bfd_get_section_by_name (abfd, ".data.rel"); | |
64 | ||
65 | /* Note that we assume that the reloc_count field has already | |
66 | been set up. We could call bfd_get_reloc_upper_bound, but | |
67 | that returns the size of a memory buffer rather than a reloc | |
68 | count. We do not want to call bfd_canonicalize_reloc, | |
69 | because although it would always work it would force us to | |
70 | read in the relocs into BFD canonical form, which would waste | |
71 | a significant amount of time and memory. */ | |
72 | if (datasec != NULL && datasec->reloc_count > 0) | |
73 | { | |
74 | asection *relsec; | |
75 | ||
76 | relsec = bfd_make_section (abfd, ".emreloc"); | |
77 | if (relsec == NULL | |
78 | || ! bfd_set_section_flags (abfd, relsec, | |
79 | (SEC_ALLOC | |
80 | | SEC_LOAD | |
81 | | SEC_HAS_CONTENTS | |
82 | | SEC_IN_MEMORY)) | |
83 | || ! bfd_set_section_alignment (abfd, relsec, 2) | |
84 | || ! bfd_set_section_size (abfd, relsec, | |
85 | datasec->reloc_count * 8)) | |
df5f2391 | 86 | einfo (_("%F%P: %pB: can not create .emreloc section: %E\n")); |
7251ccbf SR |
87 | } |
88 | ||
89 | /* Double check that all other data sections are empty, as is | |
90 | required for embedded PIC code. */ | |
e4492aa0 | 91 | bfd_map_over_sections (abfd, check_sections, datasec); |
7251ccbf SR |
92 | } |
93 | } | |
94 | } | |
95 | ||
96 | /* Check that of the data sections, only the .data section has | |
97 | relocs. This is called via bfd_map_over_sections. */ | |
98 | ||
99 | static void | |
100 | check_sections (bfd *abfd, asection *sec, void *datasec) | |
101 | { | |
102 | if ((strncmp (bfd_get_section_name (abfd, sec), ".data.rel", 9) == 0) | |
d003af55 AM |
103 | && sec != datasec |
104 | && sec->reloc_count == 0 ) | |
df5f2391 | 105 | einfo (_("%X%P: %pB: section %s has relocs; can not use --embedded-relocs\n"), |
7251ccbf SR |
106 | abfd, bfd_get_section_name (abfd, sec)); |
107 | } | |
108 | ||
3d3d428f NC |
109 | static void |
110 | cr16elf_after_parse (void) | |
111 | { | |
112 | /* Always behave as if called with --sort-common command line | |
113 | option. | |
114 | This is to emulate the CRTools' method of keeping variables | |
115 | of different alignment in separate sections. */ | |
116 | config.sort_common = TRUE; | |
117 | ||
118 | /* Don't create a demand-paged executable, since this feature isn't | |
119 | meaninful in CR16 embedded systems. Moreover, when magic_demand_paged | |
120 | is true the link sometimes fails. */ | |
121 | config.magic_demand_paged = FALSE; | |
97b11f40 | 122 | |
5fe2850d | 123 | gld${EMULATION_NAME}_after_parse (); |
3d3d428f NC |
124 | } |
125 | ||
126 | /* This is called after the sections have been attached to output | |
127 | sections, but before any sizes or addresses have been set. */ | |
128 | ||
129 | static void | |
130 | cr16elf_before_allocation (void) | |
131 | { | |
132 | /* Call the default first. */ | |
133 | gld${EMULATION_NAME}_before_allocation (); | |
134 | ||
d003af55 AM |
135 | if (command_line.embedded_relocs |
136 | && (!bfd_link_relocatable (&link_info))) | |
137 | { | |
7251ccbf | 138 | |
d003af55 | 139 | bfd *abfd; |
7251ccbf | 140 | |
d003af55 | 141 | /* If we are generating embedded relocs, call a special BFD backend |
7251ccbf | 142 | routine to do the work. */ |
d003af55 AM |
143 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next) |
144 | { | |
7251ccbf SR |
145 | asection *datasec, *relsec; |
146 | char *errmsg; | |
147 | ||
148 | datasec = bfd_get_section_by_name (abfd, ".data.rel"); | |
149 | ||
150 | if (datasec == NULL || datasec->reloc_count == 0) | |
151 | continue; | |
152 | ||
153 | relsec = bfd_get_section_by_name (abfd, ".emreloc"); | |
154 | ASSERT (relsec != NULL); | |
155 | ||
156 | if (! bfd_cr16_elf32_create_embedded_relocs (abfd, &link_info, | |
d003af55 AM |
157 | datasec, relsec, |
158 | &errmsg)) | |
159 | { | |
160 | if (errmsg == NULL) | |
df5f2391 | 161 | einfo (_("%X%P: %pB: can not create runtime reloc information: %E\n"), |
d003af55 AM |
162 | abfd); |
163 | else | |
df5f2391 | 164 | einfo (_("%X%P: %pB: can not create runtime reloc information: %s\n"), |
d003af55 AM |
165 | abfd, errmsg); |
166 | } | |
167 | } | |
168 | } | |
7251ccbf | 169 | |
3d3d428f NC |
170 | /* Enable relaxation by default if the "--no-relax" option was not |
171 | specified. This is done here instead of in the before_parse hook | |
172 | because there is a check in main() to prohibit use of --relax and | |
173 | -r together. */ | |
28d5f677 NC |
174 | if (RELAXATION_DISABLED_BY_DEFAULT) |
175 | ENABLE_RELAXATION; | |
3d3d428f NC |
176 | } |
177 | ||
178 | EOF | |
179 | ||
3d3d428f NC |
180 | # Put these extra cr16-elf routines in ld_${EMULATION_NAME}_emulation |
181 | # | |
7251ccbf | 182 | LDEMUL_AFTER_OPEN=cr16_elf_after_open |
3d3d428f NC |
183 | LDEMUL_AFTER_PARSE=cr16elf_after_parse |
184 | LDEMUL_BEFORE_ALLOCATION=cr16elf_before_allocation |