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3c3bdf30 | 1 | # This shell script emits a C file. -*- C -*- |
4b95cf5c | 2 | # Copyright (C) 2001-2014 Free Software Foundation, Inc. |
3c3bdf30 | 3 | # |
f96b4a7b | 4 | # This file is part of the GNU Binutils. |
3c3bdf30 NC |
5 | # |
6 | # This program is free software; you can redistribute it and/or modify | |
7 | # it under the terms of the GNU General Public License as published by | |
f96b4a7b | 8 | # the Free Software Foundation; either version 3 of the License, or |
3c3bdf30 NC |
9 | # (at your option) any later version. |
10 | # | |
11 | # This program is distributed in the hope that it will be useful, | |
12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | # GNU General Public License for more details. | |
15 | # | |
16 | # You should have received a copy of the GNU General Public License | |
17 | # along with this program; if not, write to the Free Software | |
f96b4a7b NC |
18 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | # MA 02110-1301, USA. | |
3c3bdf30 NC |
20 | # |
21 | ||
a4308b79 | 22 | # This file is sourced from generic.em. |
3c3bdf30 | 23 | |
92b93329 | 24 | fragment <<EOF |
a4308b79 HPN |
25 | /* Need to have this macro defined before mmix-elfnmmo, which uses the |
26 | name for the before_allocation function, defined in ldemul.c (for | |
27 | the mmo "emulation") or in elf32.em (for the elf64mmix | |
28 | "emulation"). */ | |
48fa4a5d | 29 | #define gldmmo_before_allocation before_allocation_default |
8ded5a0f | 30 | |
a4308b79 HPN |
31 | /* We include this header *not* because we expect to handle ELF here |
32 | but because we re-use the map_segments function in elf-generic.em, | |
33 | a file which is rightly somewhat ELF-centric. But this is only to | |
34 | get a weird testcase right; ld-mmix/bpo-22, forcing ELF to be | |
35 | output from the mmo emulation: -m mmo --oformat elf64-mmix! */ | |
8ded5a0f | 36 | #include "elf-bfd.h" |
eaeb0a9d AM |
37 | |
38 | static void gld${EMULATION_NAME}_after_allocation (void); | |
48fa4a5d HPN |
39 | EOF |
40 | ||
92b93329 RM |
41 | source_em ${srcdir}/emultempl/elf-generic.em |
42 | source_em ${srcdir}/emultempl/mmix-elfnmmo.em | |
3c3bdf30 | 43 | |
92b93329 | 44 | fragment <<EOF |
3c3bdf30 | 45 | |
3c3bdf30 NC |
46 | /* Place an orphan section. We use this to put random SEC_CODE or |
47 | SEC_READONLY sections right after MMO_TEXT_SECTION_NAME. Much borrowed | |
48 | from elf32.em. */ | |
49 | ||
c2edb4b8 | 50 | static lang_output_section_statement_type * |
8a99a385 AM |
51 | mmo_place_orphan (asection *s, |
52 | const char *secname, | |
53 | int constraint ATTRIBUTE_UNUSED) | |
3c3bdf30 | 54 | { |
a9ae0bda HPN |
55 | static struct |
56 | { | |
57 | flagword nonzero_flags; | |
58 | struct orphan_save orphansave; | |
59 | } holds[] = | |
60 | { | |
61 | { | |
62 | SEC_CODE | SEC_READONLY, | |
63 | { | |
64 | MMO_TEXT_SECTION_NAME, | |
65 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE, | |
66 | 0, 0, 0, 0 | |
67 | } | |
68 | }, | |
69 | { | |
70 | SEC_LOAD | SEC_DATA, | |
71 | { | |
72 | MMO_DATA_SECTION_NAME, | |
73 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA, | |
74 | 0, 0, 0, 0 | |
75 | } | |
76 | }, | |
77 | { | |
78 | SEC_ALLOC, | |
79 | { | |
80 | ".bss", | |
81 | SEC_ALLOC, | |
82 | 0, 0, 0, 0 | |
83 | } | |
84 | } | |
85 | }; | |
86 | ||
87 | struct orphan_save *place = NULL; | |
afd7a018 | 88 | lang_output_section_statement_type *after; |
3c3bdf30 | 89 | lang_output_section_statement_type *os; |
a9ae0bda | 90 | size_t i; |
3c3bdf30 | 91 | |
a9ae0bda HPN |
92 | /* We have nothing to say for anything other than a final link or |
93 | for sections that are excluded. */ | |
1049f94e | 94 | if (link_info.relocatable |
a9ae0bda | 95 | || (s->flags & SEC_EXCLUDE) != 0) |
c2edb4b8 | 96 | return NULL; |
3c3bdf30 | 97 | |
afd7a018 | 98 | os = lang_output_section_find (secname); |
3c3bdf30 NC |
99 | |
100 | /* We have an output section by this name. Place the section inside it | |
101 | (regardless of whether the linker script lists it as input). */ | |
102 | if (os != NULL) | |
103 | { | |
b9c361e0 | 104 | lang_add_section (&os->children, s, NULL, os); |
c2edb4b8 | 105 | return os; |
3c3bdf30 NC |
106 | } |
107 | ||
a9ae0bda HPN |
108 | /* Check for matching section type flags for sections we care about. |
109 | A section without contents can have SEC_LOAD == 0, but we still | |
110 | want it attached to a sane section so the symbols appear as | |
111 | expected. */ | |
112 | if ((s->flags & (SEC_ALLOC | SEC_READONLY)) != SEC_READONLY) | |
113 | for (i = 0; i < sizeof (holds) / sizeof (holds[0]); i++) | |
114 | if ((s->flags & holds[i].nonzero_flags) != 0) | |
115 | { | |
116 | place = &holds[i].orphansave; | |
117 | if (place->os == NULL) | |
118 | place->os = lang_output_section_find (place->name); | |
119 | break; | |
120 | } | |
121 | ||
122 | if (place == NULL) | |
123 | { | |
124 | /* For other combinations, we have to give up, except we make | |
125 | sure not to place the orphan section after the | |
126 | linker-generated register section; that'd make it continue | |
127 | the reg section and we never want that to happen for orphan | |
128 | sections. */ | |
129 | lang_output_section_statement_type *before; | |
130 | lang_output_section_statement_type *lookup; | |
131 | static struct orphan_save hold_nonreg = | |
132 | { | |
133 | NULL, | |
134 | SEC_READONLY, | |
135 | 0, 0, 0, 0 | |
136 | }; | |
137 | ||
138 | if (hold_nonreg.os == NULL) | |
139 | { | |
140 | before = lang_output_section_find (MMIX_REG_CONTENTS_SECTION_NAME); | |
141 | ||
142 | /* If we have no such section, all fine; we don't care where | |
143 | it's placed. */ | |
144 | if (before == NULL) | |
145 | return NULL; | |
146 | ||
147 | /* We have to find the oss before this one, so we can use that as | |
148 | "after". */ | |
149 | for (lookup = &lang_output_section_statement.head->output_section_statement; | |
150 | lookup != NULL && lookup->next != before; | |
151 | lookup = lookup->next) | |
152 | ; | |
153 | ||
154 | hold_nonreg.os = lookup; | |
155 | } | |
156 | ||
157 | place = &hold_nonreg; | |
158 | } | |
3c3bdf30 | 159 | |
a9ae0bda HPN |
160 | after = place->os; |
161 | if (after == NULL) | |
162 | return NULL; | |
3c3bdf30 | 163 | |
a9ae0bda HPN |
164 | /* If there's an output section by *this* name, we'll use it, regardless |
165 | of actual section flags, in contrast to what's done in elf32.em. */ | |
8a99a385 | 166 | os = lang_insert_orphan (s, secname, 0, after, place, NULL, NULL); |
25844aae | 167 | |
c2edb4b8 | 168 | return os; |
3c3bdf30 NC |
169 | } |
170 | ||
171 | /* Remove the spurious settings of SEC_RELOC that make it to the output at | |
172 | link time. We are as confused as elflink.h:elf_bfd_final_link, and | |
173 | paper over the bug similarly. */ | |
174 | ||
175 | static void | |
0c7a8e5a | 176 | mmo_wipe_sec_reloc_flag (bfd *abfd, asection *sec, void *ptr ATTRIBUTE_UNUSED) |
3c3bdf30 NC |
177 | { |
178 | bfd_set_section_flags (abfd, sec, | |
179 | bfd_get_section_flags (abfd, sec) & ~SEC_RELOC); | |
180 | } | |
181 | ||
182 | /* Iterate with bfd_map_over_sections over mmo_wipe_sec_reloc_flag... */ | |
183 | ||
184 | static void | |
eaeb0a9d | 185 | gld${EMULATION_NAME}_after_allocation (void) |
3c3bdf30 | 186 | { |
f13a99db | 187 | bfd_map_over_sections (link_info.output_bfd, mmo_wipe_sec_reloc_flag, NULL); |
8ded5a0f | 188 | gld${EMULATION_NAME}_map_segments (FALSE); |
3c3bdf30 | 189 | } |
48fa4a5d HPN |
190 | \f |
191 | /* To get on-demand global register allocation right, we need to parse the | |
192 | relocs, like what happens when linking to ELF. It needs to be done | |
193 | before all input sections are supposed to be present. When linking to | |
194 | ELF, it's done when reading symbols. When linking to mmo, we do it | |
195 | when all input files are seen, which is equivalent. */ | |
3c3bdf30 | 196 | |
48fa4a5d | 197 | static void |
0c7a8e5a | 198 | mmo_after_open (void) |
48fa4a5d | 199 | { |
1c5e6447 HPN |
200 | /* When there's a mismatch between the output format and the emulation |
201 | (using weird combinations like "-m mmo --oformat elf64-mmix" for | |
202 | example), we'd count relocs twice because they'd also be counted | |
203 | along the usual route for ELF-only linking, which would lead to an | |
204 | internal accounting error. */ | |
f13a99db | 205 | if (bfd_get_flavour (link_info.output_bfd) != bfd_target_elf_flavour) |
48fa4a5d | 206 | { |
1c5e6447 HPN |
207 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
208 | { | |
209 | if (bfd_get_flavour (is->the_bfd) == bfd_target_elf_flavour | |
210 | && !_bfd_mmix_check_all_relocs (is->the_bfd, &link_info)) | |
211 | einfo ("%X%P: Internal problems scanning %B after opening it", | |
212 | is->the_bfd); | |
213 | } | |
48fa4a5d | 214 | } |
5c3049d2 | 215 | after_open_default (); |
48fa4a5d | 216 | } |
3c3bdf30 NC |
217 | EOF |
218 | ||
219 | LDEMUL_PLACE_ORPHAN=mmo_place_orphan | |
48fa4a5d | 220 | LDEMUL_AFTER_OPEN=mmo_after_open |