Commit | Line | Data |
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252b5132 | 1 | # This shell script emits a C file. -*- C -*- |
5e2f1575 | 2 | # Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004 |
41392f03 AM |
3 | # Free Software Foundation, Inc. |
4 | # | |
5 | # This file is part of GLD, the Gnu Linker. | |
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 | |
9 | # the Free Software Foundation; either version 2 of the License, or | |
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 | |
19 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
20 | # | |
21 | ||
22 | # This file is sourced from elf32.em, and defines extra arm-elf | |
23 | # specific routines. | |
24 | # | |
25 | cat >>e${EMULATION_NAME}.c <<EOF | |
7ca69e9e | 26 | |
88f7bcd5 NC |
27 | static int no_pipeline_knowledge = 0; |
28 | static char *thumb_entry_symbol = NULL; | |
29 | static bfd *bfd_for_interwork; | |
7ca69e9e | 30 | |
252b5132 | 31 | static void |
0c7a8e5a | 32 | gld${EMULATION_NAME}_before_parse (void) |
252b5132 RH |
33 | { |
34 | #ifndef TARGET_ /* I.e., if not generic. */ | |
5e2f1575 | 35 | ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); |
252b5132 | 36 | #endif /* not TARGET_ */ |
b34976b6 AM |
37 | config.dynamic_link = ${DYNAMIC_LINK-TRUE}; |
38 | config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`; | |
252b5132 RH |
39 | } |
40 | ||
1220a729 | 41 | static void |
0c7a8e5a | 42 | arm_elf_after_open (void) |
1220a729 | 43 | { |
f11523b0 | 44 | if (strstr (bfd_get_target (output_bfd), "arm") == NULL) |
1220a729 | 45 | { |
f11523b0 NC |
46 | /* The arm backend needs special fields in the output hash structure. |
47 | These will only be created if the output format is an arm format, | |
48 | hence we do not support linking and changing output formats at the | |
49 | same time. Use a link followed by objcopy to change output formats. */ | |
50 | einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n"); | |
51 | return; | |
1220a729 NC |
52 | } |
53 | ||
f11523b0 NC |
54 | { |
55 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
56 | { | |
8afb0e02 | 57 | bfd_elf32_arm_add_glue_sections_to_bfd (is->the_bfd, & link_info); |
f11523b0 NC |
58 | } |
59 | } | |
60 | ||
41392f03 AM |
61 | /* Call the standard elf routine. */ |
62 | gld${EMULATION_NAME}_after_open (); | |
1220a729 NC |
63 | } |
64 | ||
8afb0e02 | 65 | static void |
0c7a8e5a | 66 | arm_elf_set_bfd_for_interworking (lang_statement_union_type *statement) |
8afb0e02 NC |
67 | { |
68 | if (statement->header.type == lang_input_section_enum | |
b34976b6 | 69 | && !statement->input_section.ifile->just_syms_flag) |
8afb0e02 | 70 | { |
88f7bcd5 NC |
71 | asection *i = statement->input_section.section; |
72 | asection *output_section = i->output_section; | |
8afb0e02 NC |
73 | |
74 | ASSERT (output_section->owner == output_bfd); | |
75 | ||
76 | if ((output_section->flags & SEC_HAS_CONTENTS) != 0 | |
77 | && (i->flags & SEC_NEVER_LOAD) == 0 | |
78 | && ! i->owner->output_has_begun) | |
79 | { | |
80 | bfd_for_interwork = i->owner; | |
b34976b6 | 81 | bfd_for_interwork->output_has_begun = TRUE; |
8afb0e02 NC |
82 | } |
83 | } | |
84 | } | |
1220a729 | 85 | |
1220a729 | 86 | static void |
0c7a8e5a | 87 | arm_elf_before_allocation (void) |
1220a729 | 88 | { |
88f7bcd5 | 89 | bfd *tem; |
8afb0e02 | 90 | |
41392f03 AM |
91 | /* Call the standard elf routine. */ |
92 | gld${EMULATION_NAME}_before_allocation (); | |
1220a729 | 93 | |
2004afbc NC |
94 | if (link_info.input_bfds != NULL) |
95 | { | |
96 | /* The interworking bfd must be the last one in the link. */ | |
97 | bfd_for_interwork = NULL; | |
98 | for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) | |
b34976b6 | 99 | tem->output_has_begun = FALSE; |
252b5132 | 100 | |
2004afbc | 101 | lang_for_each_statement (arm_elf_set_bfd_for_interworking); |
2004afbc | 102 | for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) |
b34976b6 | 103 | tem->output_has_begun = FALSE; |
8afb0e02 | 104 | |
06aa7234 NC |
105 | /* If bfd_for_interwork is NULL, then there are no loadable sections |
106 | with real contents to be linked, so we are not going to have to | |
107 | create any interworking stubs, so it is OK not to call | |
108 | bfd_elf32_arm_get_bfd_for_interworking. */ | |
109 | if (bfd_for_interwork != NULL) | |
110 | bfd_elf32_arm_get_bfd_for_interworking (bfd_for_interwork, &link_info); | |
2004afbc | 111 | } |
8afb0e02 NC |
112 | /* We should be able to set the size of the interworking stub section. */ |
113 | ||
114 | /* Here we rummage through the found bfds to collect glue information. */ | |
115 | /* FIXME: should this be based on a command line option? krk@cygnus.com */ | |
252b5132 RH |
116 | { |
117 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
118 | { | |
7ca69e9e NC |
119 | if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, & link_info, |
120 | no_pipeline_knowledge)) | |
252b5132 RH |
121 | { |
122 | /* xgettext:c-format */ | |
123 | einfo (_("Errors encountered processing file %s"), is->filename); | |
124 | } | |
125 | } | |
126 | } | |
127 | ||
8afb0e02 | 128 | /* We have seen it all. Allocate it, and carry on. */ |
252b5132 RH |
129 | bfd_elf32_arm_allocate_interworking_sections (& link_info); |
130 | } | |
131 | ||
6f798e5c | 132 | static void |
0c7a8e5a | 133 | arm_elf_finish (void) |
6f798e5c NC |
134 | { |
135 | struct bfd_link_hash_entry * h; | |
136 | ||
c56feb2b AM |
137 | /* Call the elf32.em routine. */ |
138 | gld${EMULATION_NAME}_finish (); | |
139 | ||
88f7bcd5 NC |
140 | if (thumb_entry_symbol == NULL) |
141 | return; | |
0c7a8e5a | 142 | |
88f7bcd5 | 143 | h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, |
b34976b6 | 144 | FALSE, FALSE, TRUE); |
6f798e5c NC |
145 | |
146 | if (h != (struct bfd_link_hash_entry *) NULL | |
147 | && (h->type == bfd_link_hash_defined | |
148 | || h->type == bfd_link_hash_defweak) | |
149 | && h->u.def.section->output_section != NULL) | |
150 | { | |
151 | static char buffer[32]; | |
88f7bcd5 | 152 | bfd_vma val; |
0c7a8e5a | 153 | |
88f7bcd5 NC |
154 | /* Special procesing is required for a Thumb entry symbol. The |
155 | bottom bit of its address must be set. */ | |
156 | val = (h->u.def.value | |
157 | + bfd_get_section_vma (output_bfd, | |
158 | h->u.def.section->output_section) | |
159 | + h->u.def.section->output_offset); | |
0c7a8e5a | 160 | |
88f7bcd5 | 161 | val |= 1; |
6f798e5c | 162 | |
88f7bcd5 | 163 | /* Now convert this value into a string and store it in entry_symbol |
0c7a8e5a | 164 | where the lang_finish() function will pick it up. */ |
88f7bcd5 NC |
165 | buffer[0] = '0'; |
166 | buffer[1] = 'x'; | |
0c7a8e5a | 167 | |
88f7bcd5 | 168 | sprintf_vma (buffer + 2, val); |
6f798e5c | 169 | |
88f7bcd5 NC |
170 | if (entry_symbol.name != NULL && entry_from_cmdline) |
171 | einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), | |
172 | thumb_entry_symbol, entry_symbol.name); | |
173 | entry_symbol.name = buffer; | |
6f798e5c | 174 | } |
88f7bcd5 NC |
175 | else |
176 | einfo (_("%P: warning: connot find thumb start symbol %s\n"), | |
177 | thumb_entry_symbol); | |
6f798e5c NC |
178 | } |
179 | ||
252b5132 RH |
180 | EOF |
181 | ||
41392f03 AM |
182 | # Define some shell vars to insert bits of code into the standard elf |
183 | # parse_args and list_options functions. | |
184 | # | |
185 | PARSE_AND_LIST_PROLOGUE=' | |
186 | #define OPTION_THUMB_ENTRY 301 | |
187 | ' | |
252b5132 | 188 | |
ef5bdbd1 | 189 | PARSE_AND_LIST_SHORTOPTS=p |
252b5132 | 190 | |
41392f03 AM |
191 | PARSE_AND_LIST_LONGOPTS=' |
192 | { "no-pipeline-knowledge", no_argument, NULL, '\'p\''}, | |
193 | { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, | |
194 | ' | |
252b5132 | 195 | |
41392f03 AM |
196 | PARSE_AND_LIST_OPTIONS=' |
197 | fprintf (file, _(" -p --no-pipeline-knowledge Stop the linker knowing about the pipeline length\n")); | |
198 | fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); | |
199 | ' | |
252b5132 | 200 | |
41392f03 AM |
201 | PARSE_AND_LIST_ARGS_CASES=' |
202 | case '\'p\'': | |
203 | no_pipeline_knowledge = 1; | |
204 | break; | |
252b5132 | 205 | |
41392f03 AM |
206 | case OPTION_THUMB_ENTRY: |
207 | thumb_entry_symbol = optarg; | |
208 | break; | |
209 | ' | |
252b5132 | 210 | |
41392f03 AM |
211 | # We have our own after_open and before_allocation functions, but they call |
212 | # the standard routines, so give them a different name. | |
213 | LDEMUL_AFTER_OPEN=arm_elf_after_open | |
214 | LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation | |
252b5132 | 215 | |
41392f03 AM |
216 | # Replace the elf before_parse function with our own. |
217 | LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse | |
252b5132 | 218 | |
41392f03 | 219 | # Call the extra arm-elf function |
a48ca7f2 | 220 | LDEMUL_FINISH=arm_elf_finish |