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3c3bdf30 | 1 | # This shell script emits a C file. -*- C -*- |
f96b4a7b | 2 | # Copyright 2001, 2002, 2003, 2004, 2006, 2007 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" |
48fa4a5d HPN |
37 | EOF |
38 | ||
92b93329 RM |
39 | source_em ${srcdir}/emultempl/elf-generic.em |
40 | source_em ${srcdir}/emultempl/mmix-elfnmmo.em | |
3c3bdf30 | 41 | |
92b93329 | 42 | fragment <<EOF |
3c3bdf30 | 43 | |
3c3bdf30 NC |
44 | /* Place an orphan section. We use this to put random SEC_CODE or |
45 | SEC_READONLY sections right after MMO_TEXT_SECTION_NAME. Much borrowed | |
46 | from elf32.em. */ | |
47 | ||
b34976b6 | 48 | static bfd_boolean |
7b986e99 | 49 | mmo_place_orphan (asection *s) |
3c3bdf30 | 50 | { |
afd7a018 AM |
51 | static struct orphan_save hold_text = |
52 | { | |
53 | MMO_TEXT_SECTION_NAME, | |
54 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE, | |
55 | 0, 0, 0, 0 | |
56 | }; | |
3c3bdf30 | 57 | struct orphan_save *place; |
afd7a018 AM |
58 | const char *secname; |
59 | lang_output_section_statement_type *after; | |
3c3bdf30 | 60 | lang_output_section_statement_type *os; |
3c3bdf30 NC |
61 | |
62 | /* We have nothing to say for anything other than a final link. */ | |
1049f94e | 63 | if (link_info.relocatable |
afd7a018 | 64 | || (s->flags & (SEC_EXCLUDE | SEC_LOAD)) != SEC_LOAD) |
b34976b6 | 65 | return FALSE; |
3c3bdf30 NC |
66 | |
67 | /* Only care for sections we're going to load. */ | |
afd7a018 AM |
68 | secname = s->name; |
69 | os = lang_output_section_find (secname); | |
3c3bdf30 NC |
70 | |
71 | /* We have an output section by this name. Place the section inside it | |
72 | (regardless of whether the linker script lists it as input). */ | |
73 | if (os != NULL) | |
74 | { | |
7b986e99 | 75 | lang_add_section (&os->children, s, os); |
b34976b6 | 76 | return TRUE; |
3c3bdf30 NC |
77 | } |
78 | ||
79 | /* If this section does not have .text-type section flags or there's no | |
80 | MMO_TEXT_SECTION_NAME, we don't have anything to say. */ | |
afd7a018 | 81 | if ((s->flags & (SEC_CODE | SEC_READONLY)) == 0) |
b34976b6 | 82 | return FALSE; |
3c3bdf30 NC |
83 | |
84 | if (hold_text.os == NULL) | |
afd7a018 | 85 | hold_text.os = lang_output_section_find (hold_text.name); |
3c3bdf30 NC |
86 | |
87 | place = &hold_text; | |
afd7a018 AM |
88 | if (hold_text.os != NULL) |
89 | after = hold_text.os; | |
90 | else | |
91 | after = &lang_output_section_statement.head->output_section_statement; | |
3c3bdf30 NC |
92 | |
93 | /* If there's an output section by this name, we'll use it, regardless | |
94 | of section flags, in contrast to what's done in elf32.em. */ | |
7b986e99 | 95 | os = lang_insert_orphan (s, secname, after, place, NULL, NULL); |
25844aae | 96 | |
3595bd6e HPN |
97 | /* We need an output section for .text as a root, so if there was none |
98 | (might happen with a peculiar linker script such as in "map | |
99 | addresses", map-address.exp), we grab the output section created | |
100 | above. */ | |
101 | if (hold_text.os == NULL) | |
afd7a018 | 102 | hold_text.os = os; |
3c3bdf30 | 103 | |
b34976b6 | 104 | return TRUE; |
3c3bdf30 NC |
105 | } |
106 | ||
107 | /* Remove the spurious settings of SEC_RELOC that make it to the output at | |
108 | link time. We are as confused as elflink.h:elf_bfd_final_link, and | |
109 | paper over the bug similarly. */ | |
110 | ||
111 | static void | |
0c7a8e5a | 112 | mmo_wipe_sec_reloc_flag (bfd *abfd, asection *sec, void *ptr ATTRIBUTE_UNUSED) |
3c3bdf30 NC |
113 | { |
114 | bfd_set_section_flags (abfd, sec, | |
115 | bfd_get_section_flags (abfd, sec) & ~SEC_RELOC); | |
116 | } | |
117 | ||
118 | /* Iterate with bfd_map_over_sections over mmo_wipe_sec_reloc_flag... */ | |
119 | ||
120 | static void | |
0c7a8e5a | 121 | mmo_finish (void) |
3c3bdf30 NC |
122 | { |
123 | bfd_map_over_sections (output_bfd, mmo_wipe_sec_reloc_flag, NULL); | |
8ded5a0f | 124 | gld${EMULATION_NAME}_map_segments (FALSE); |
1e035701 | 125 | finish_default (); |
3c3bdf30 | 126 | } |
48fa4a5d HPN |
127 | \f |
128 | /* To get on-demand global register allocation right, we need to parse the | |
129 | relocs, like what happens when linking to ELF. It needs to be done | |
130 | before all input sections are supposed to be present. When linking to | |
131 | ELF, it's done when reading symbols. When linking to mmo, we do it | |
132 | when all input files are seen, which is equivalent. */ | |
3c3bdf30 | 133 | |
48fa4a5d | 134 | static void |
0c7a8e5a | 135 | mmo_after_open (void) |
48fa4a5d | 136 | { |
1c5e6447 HPN |
137 | /* When there's a mismatch between the output format and the emulation |
138 | (using weird combinations like "-m mmo --oformat elf64-mmix" for | |
139 | example), we'd count relocs twice because they'd also be counted | |
140 | along the usual route for ELF-only linking, which would lead to an | |
141 | internal accounting error. */ | |
142 | if (bfd_get_flavour (output_bfd) != bfd_target_elf_flavour) | |
48fa4a5d | 143 | { |
1c5e6447 HPN |
144 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
145 | { | |
146 | if (bfd_get_flavour (is->the_bfd) == bfd_target_elf_flavour | |
147 | && !_bfd_mmix_check_all_relocs (is->the_bfd, &link_info)) | |
148 | einfo ("%X%P: Internal problems scanning %B after opening it", | |
149 | is->the_bfd); | |
150 | } | |
48fa4a5d HPN |
151 | } |
152 | } | |
3c3bdf30 NC |
153 | EOF |
154 | ||
155 | LDEMUL_PLACE_ORPHAN=mmo_place_orphan | |
156 | LDEMUL_FINISH=mmo_finish | |
48fa4a5d | 157 | LDEMUL_AFTER_OPEN=mmo_after_open |