Commit | Line | Data |
---|---|---|
3c3bdf30 | 1 | # This shell script emits a C file. -*- C -*- |
a4308b79 | 2 | # Copyright 2001, 2002, 2003, 2004, 2006 Free Software Foundation, Inc. |
3c3bdf30 NC |
3 | # |
4 | # This file is part of GLD, the Gnu Linker. | |
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 | |
8 | # the Free Software Foundation; either version 2 of the License, or | |
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 | |
75be928b | 18 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. |
3c3bdf30 NC |
19 | # |
20 | ||
a4308b79 | 21 | # This file is sourced from generic.em. |
3c3bdf30 | 22 | |
48fa4a5d | 23 | cat >>e${EMULATION_NAME}.c <<EOF |
a4308b79 HPN |
24 | /* Need to have this macro defined before mmix-elfnmmo, which uses the |
25 | name for the before_allocation function, defined in ldemul.c (for | |
26 | the mmo "emulation") or in elf32.em (for the elf64mmix | |
27 | "emulation"). */ | |
48fa4a5d | 28 | #define gldmmo_before_allocation before_allocation_default |
8ded5a0f | 29 | |
a4308b79 HPN |
30 | /* We include this header *not* because we expect to handle ELF here |
31 | but because we re-use the map_segments function in elf-generic.em, | |
32 | a file which is rightly somewhat ELF-centric. But this is only to | |
33 | get a weird testcase right; ld-mmix/bpo-22, forcing ELF to be | |
34 | output from the mmo emulation: -m mmo --oformat elf64-mmix! */ | |
8ded5a0f | 35 | #include "elf-bfd.h" |
48fa4a5d HPN |
36 | EOF |
37 | ||
8ded5a0f | 38 | . ${srcdir}/emultempl/elf-generic.em |
3c3bdf30 NC |
39 | . ${srcdir}/emultempl/mmix-elfnmmo.em |
40 | ||
41 | cat >>e${EMULATION_NAME}.c <<EOF | |
42 | ||
3c3bdf30 NC |
43 | /* Place an orphan section. We use this to put random SEC_CODE or |
44 | SEC_READONLY sections right after MMO_TEXT_SECTION_NAME. Much borrowed | |
45 | from elf32.em. */ | |
46 | ||
b34976b6 | 47 | static bfd_boolean |
7b986e99 | 48 | mmo_place_orphan (asection *s) |
3c3bdf30 | 49 | { |
afd7a018 AM |
50 | static struct orphan_save hold_text = |
51 | { | |
52 | MMO_TEXT_SECTION_NAME, | |
53 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE, | |
54 | 0, 0, 0, 0 | |
55 | }; | |
3c3bdf30 | 56 | struct orphan_save *place; |
afd7a018 AM |
57 | const char *secname; |
58 | lang_output_section_statement_type *after; | |
3c3bdf30 | 59 | lang_output_section_statement_type *os; |
3c3bdf30 NC |
60 | |
61 | /* We have nothing to say for anything other than a final link. */ | |
1049f94e | 62 | if (link_info.relocatable |
afd7a018 | 63 | || (s->flags & (SEC_EXCLUDE | SEC_LOAD)) != SEC_LOAD) |
b34976b6 | 64 | return FALSE; |
3c3bdf30 NC |
65 | |
66 | /* Only care for sections we're going to load. */ | |
afd7a018 AM |
67 | secname = s->name; |
68 | os = lang_output_section_find (secname); | |
3c3bdf30 NC |
69 | |
70 | /* We have an output section by this name. Place the section inside it | |
71 | (regardless of whether the linker script lists it as input). */ | |
72 | if (os != NULL) | |
73 | { | |
7b986e99 | 74 | lang_add_section (&os->children, s, os); |
b34976b6 | 75 | return TRUE; |
3c3bdf30 NC |
76 | } |
77 | ||
78 | /* If this section does not have .text-type section flags or there's no | |
79 | MMO_TEXT_SECTION_NAME, we don't have anything to say. */ | |
afd7a018 | 80 | if ((s->flags & (SEC_CODE | SEC_READONLY)) == 0) |
b34976b6 | 81 | return FALSE; |
3c3bdf30 NC |
82 | |
83 | if (hold_text.os == NULL) | |
afd7a018 | 84 | hold_text.os = lang_output_section_find (hold_text.name); |
3c3bdf30 NC |
85 | |
86 | place = &hold_text; | |
afd7a018 AM |
87 | if (hold_text.os != NULL) |
88 | after = hold_text.os; | |
89 | else | |
90 | after = &lang_output_section_statement.head->output_section_statement; | |
3c3bdf30 NC |
91 | |
92 | /* If there's an output section by this name, we'll use it, regardless | |
93 | of section flags, in contrast to what's done in elf32.em. */ | |
7b986e99 | 94 | os = lang_insert_orphan (s, secname, after, place, NULL, NULL); |
25844aae | 95 | |
3595bd6e HPN |
96 | /* We need an output section for .text as a root, so if there was none |
97 | (might happen with a peculiar linker script such as in "map | |
98 | addresses", map-address.exp), we grab the output section created | |
99 | above. */ | |
100 | if (hold_text.os == NULL) | |
afd7a018 | 101 | hold_text.os = os; |
3c3bdf30 | 102 | |
b34976b6 | 103 | return TRUE; |
3c3bdf30 NC |
104 | } |
105 | ||
106 | /* Remove the spurious settings of SEC_RELOC that make it to the output at | |
107 | link time. We are as confused as elflink.h:elf_bfd_final_link, and | |
108 | paper over the bug similarly. */ | |
109 | ||
110 | static void | |
0c7a8e5a | 111 | mmo_wipe_sec_reloc_flag (bfd *abfd, asection *sec, void *ptr ATTRIBUTE_UNUSED) |
3c3bdf30 NC |
112 | { |
113 | bfd_set_section_flags (abfd, sec, | |
114 | bfd_get_section_flags (abfd, sec) & ~SEC_RELOC); | |
115 | } | |
116 | ||
117 | /* Iterate with bfd_map_over_sections over mmo_wipe_sec_reloc_flag... */ | |
118 | ||
119 | static void | |
0c7a8e5a | 120 | mmo_finish (void) |
3c3bdf30 NC |
121 | { |
122 | bfd_map_over_sections (output_bfd, mmo_wipe_sec_reloc_flag, NULL); | |
8ded5a0f | 123 | gld${EMULATION_NAME}_map_segments (FALSE); |
1e035701 | 124 | finish_default (); |
3c3bdf30 | 125 | } |
48fa4a5d HPN |
126 | \f |
127 | /* To get on-demand global register allocation right, we need to parse the | |
128 | relocs, like what happens when linking to ELF. It needs to be done | |
129 | before all input sections are supposed to be present. When linking to | |
130 | ELF, it's done when reading symbols. When linking to mmo, we do it | |
131 | when all input files are seen, which is equivalent. */ | |
3c3bdf30 | 132 | |
48fa4a5d | 133 | static void |
0c7a8e5a | 134 | mmo_after_open (void) |
48fa4a5d | 135 | { |
1c5e6447 HPN |
136 | /* When there's a mismatch between the output format and the emulation |
137 | (using weird combinations like "-m mmo --oformat elf64-mmix" for | |
138 | example), we'd count relocs twice because they'd also be counted | |
139 | along the usual route for ELF-only linking, which would lead to an | |
140 | internal accounting error. */ | |
141 | if (bfd_get_flavour (output_bfd) != bfd_target_elf_flavour) | |
48fa4a5d | 142 | { |
1c5e6447 HPN |
143 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
144 | { | |
145 | if (bfd_get_flavour (is->the_bfd) == bfd_target_elf_flavour | |
146 | && !_bfd_mmix_check_all_relocs (is->the_bfd, &link_info)) | |
147 | einfo ("%X%P: Internal problems scanning %B after opening it", | |
148 | is->the_bfd); | |
149 | } | |
48fa4a5d HPN |
150 | } |
151 | } | |
3c3bdf30 NC |
152 | EOF |
153 | ||
154 | LDEMUL_PLACE_ORPHAN=mmo_place_orphan | |
155 | LDEMUL_FINISH=mmo_finish | |
48fa4a5d | 156 | LDEMUL_AFTER_OPEN=mmo_after_open |