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${EMULATION_NAME}.c <<EOF | |
7ca69e9e | 26 | |
88f7bcd5 NC |
27 | static int no_pipeline_knowledge = 0; |
28 | static char *thumb_entry_symbol = NULL; | |
29 | static bfd *bfd_for_interwork; | |
e489d0ae | 30 | static int byteswap_code = 0; |
7ca69e9e | 31 | |
252b5132 | 32 | static void |
0c7a8e5a | 33 | gld${EMULATION_NAME}_before_parse (void) |
252b5132 RH |
34 | { |
35 | #ifndef TARGET_ /* I.e., if not generic. */ | |
5e2f1575 | 36 | ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); |
252b5132 | 37 | #endif /* not TARGET_ */ |
b34976b6 AM |
38 | config.dynamic_link = ${DYNAMIC_LINK-TRUE}; |
39 | config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`; | |
252b5132 RH |
40 | } |
41 | ||
1220a729 | 42 | static void |
0c7a8e5a | 43 | arm_elf_after_open (void) |
1220a729 | 44 | { |
f11523b0 | 45 | if (strstr (bfd_get_target (output_bfd), "arm") == NULL) |
1220a729 | 46 | { |
f11523b0 NC |
47 | /* The arm backend needs special fields in the output hash structure. |
48 | These will only be created if the output format is an arm format, | |
49 | hence we do not support linking and changing output formats at the | |
50 | same time. Use a link followed by objcopy to change output formats. */ | |
51 | einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n"); | |
52 | return; | |
1220a729 NC |
53 | } |
54 | ||
f11523b0 NC |
55 | { |
56 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
57 | { | |
8afb0e02 | 58 | bfd_elf32_arm_add_glue_sections_to_bfd (is->the_bfd, & link_info); |
f11523b0 NC |
59 | } |
60 | } | |
61 | ||
41392f03 AM |
62 | /* Call the standard elf routine. */ |
63 | gld${EMULATION_NAME}_after_open (); | |
1220a729 NC |
64 | } |
65 | ||
8afb0e02 | 66 | static void |
0c7a8e5a | 67 | arm_elf_set_bfd_for_interworking (lang_statement_union_type *statement) |
8afb0e02 NC |
68 | { |
69 | if (statement->header.type == lang_input_section_enum | |
57ceae94 AM |
70 | && !statement->input_section.ifile->just_syms_flag |
71 | && (statement->input_section.section->flags & SEC_EXCLUDE) == 0) | |
8afb0e02 | 72 | { |
88f7bcd5 NC |
73 | asection *i = statement->input_section.section; |
74 | asection *output_section = i->output_section; | |
8afb0e02 NC |
75 | |
76 | ASSERT (output_section->owner == output_bfd); | |
77 | ||
78 | if ((output_section->flags & SEC_HAS_CONTENTS) != 0 | |
79 | && (i->flags & SEC_NEVER_LOAD) == 0 | |
80 | && ! i->owner->output_has_begun) | |
81 | { | |
82 | bfd_for_interwork = i->owner; | |
b34976b6 | 83 | bfd_for_interwork->output_has_begun = TRUE; |
8afb0e02 NC |
84 | } |
85 | } | |
86 | } | |
1220a729 | 87 | |
1220a729 | 88 | static void |
0c7a8e5a | 89 | arm_elf_before_allocation (void) |
1220a729 | 90 | { |
88f7bcd5 | 91 | bfd *tem; |
8afb0e02 | 92 | |
41392f03 AM |
93 | /* Call the standard elf routine. */ |
94 | gld${EMULATION_NAME}_before_allocation (); | |
1220a729 | 95 | |
2004afbc NC |
96 | if (link_info.input_bfds != NULL) |
97 | { | |
98 | /* The interworking bfd must be the last one in the link. */ | |
99 | bfd_for_interwork = NULL; | |
100 | for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) | |
b34976b6 | 101 | tem->output_has_begun = FALSE; |
252b5132 | 102 | |
2004afbc | 103 | lang_for_each_statement (arm_elf_set_bfd_for_interworking); |
2004afbc | 104 | for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) |
b34976b6 | 105 | tem->output_has_begun = FALSE; |
8afb0e02 | 106 | |
06aa7234 NC |
107 | /* If bfd_for_interwork is NULL, then there are no loadable sections |
108 | with real contents to be linked, so we are not going to have to | |
109 | create any interworking stubs, so it is OK not to call | |
110 | bfd_elf32_arm_get_bfd_for_interworking. */ | |
111 | if (bfd_for_interwork != NULL) | |
112 | bfd_elf32_arm_get_bfd_for_interworking (bfd_for_interwork, &link_info); | |
2004afbc | 113 | } |
8afb0e02 NC |
114 | /* We should be able to set the size of the interworking stub section. */ |
115 | ||
116 | /* Here we rummage through the found bfds to collect glue information. */ | |
117 | /* FIXME: should this be based on a command line option? krk@cygnus.com */ | |
252b5132 RH |
118 | { |
119 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
120 | { | |
7ca69e9e | 121 | if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, & link_info, |
e489d0ae PB |
122 | no_pipeline_knowledge, |
123 | byteswap_code)) | |
252b5132 RH |
124 | { |
125 | /* xgettext:c-format */ | |
126 | einfo (_("Errors encountered processing file %s"), is->filename); | |
127 | } | |
128 | } | |
129 | } | |
130 | ||
8afb0e02 | 131 | /* We have seen it all. Allocate it, and carry on. */ |
252b5132 RH |
132 | bfd_elf32_arm_allocate_interworking_sections (& link_info); |
133 | } | |
134 | ||
6f798e5c | 135 | static void |
0c7a8e5a | 136 | arm_elf_finish (void) |
6f798e5c NC |
137 | { |
138 | struct bfd_link_hash_entry * h; | |
139 | ||
c56feb2b AM |
140 | /* Call the elf32.em routine. */ |
141 | gld${EMULATION_NAME}_finish (); | |
142 | ||
88f7bcd5 NC |
143 | if (thumb_entry_symbol == NULL) |
144 | return; | |
0c7a8e5a | 145 | |
88f7bcd5 | 146 | h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, |
b34976b6 | 147 | FALSE, FALSE, TRUE); |
6f798e5c NC |
148 | |
149 | if (h != (struct bfd_link_hash_entry *) NULL | |
150 | && (h->type == bfd_link_hash_defined | |
151 | || h->type == bfd_link_hash_defweak) | |
152 | && h->u.def.section->output_section != NULL) | |
153 | { | |
154 | static char buffer[32]; | |
88f7bcd5 | 155 | bfd_vma val; |
0c7a8e5a | 156 | |
88f7bcd5 NC |
157 | /* Special procesing is required for a Thumb entry symbol. The |
158 | bottom bit of its address must be set. */ | |
159 | val = (h->u.def.value | |
160 | + bfd_get_section_vma (output_bfd, | |
161 | h->u.def.section->output_section) | |
162 | + h->u.def.section->output_offset); | |
0c7a8e5a | 163 | |
88f7bcd5 | 164 | val |= 1; |
6f798e5c | 165 | |
88f7bcd5 | 166 | /* Now convert this value into a string and store it in entry_symbol |
0c7a8e5a | 167 | where the lang_finish() function will pick it up. */ |
88f7bcd5 NC |
168 | buffer[0] = '0'; |
169 | buffer[1] = 'x'; | |
0c7a8e5a | 170 | |
88f7bcd5 | 171 | sprintf_vma (buffer + 2, val); |
6f798e5c | 172 | |
88f7bcd5 NC |
173 | if (entry_symbol.name != NULL && entry_from_cmdline) |
174 | einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), | |
175 | thumb_entry_symbol, entry_symbol.name); | |
176 | entry_symbol.name = buffer; | |
6f798e5c | 177 | } |
88f7bcd5 NC |
178 | else |
179 | einfo (_("%P: warning: connot find thumb start symbol %s\n"), | |
180 | thumb_entry_symbol); | |
6f798e5c NC |
181 | } |
182 | ||
252b5132 RH |
183 | EOF |
184 | ||
41392f03 AM |
185 | # Define some shell vars to insert bits of code into the standard elf |
186 | # parse_args and list_options functions. | |
187 | # | |
188 | PARSE_AND_LIST_PROLOGUE=' | |
189 | #define OPTION_THUMB_ENTRY 301 | |
e489d0ae | 190 | #define OPTION_BE8 302 |
41392f03 | 191 | ' |
252b5132 | 192 | |
ef5bdbd1 | 193 | PARSE_AND_LIST_SHORTOPTS=p |
252b5132 | 194 | |
41392f03 AM |
195 | PARSE_AND_LIST_LONGOPTS=' |
196 | { "no-pipeline-knowledge", no_argument, NULL, '\'p\''}, | |
197 | { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, | |
e489d0ae | 198 | { "be8", no_argument, NULL, OPTION_BE8}, |
41392f03 | 199 | ' |
252b5132 | 200 | |
41392f03 AM |
201 | PARSE_AND_LIST_OPTIONS=' |
202 | fprintf (file, _(" -p --no-pipeline-knowledge Stop the linker knowing about the pipeline length\n")); | |
203 | fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); | |
e489d0ae | 204 | fprintf (file, _(" --be8 Oputput BE8 format image\n")); |
41392f03 | 205 | ' |
252b5132 | 206 | |
41392f03 AM |
207 | PARSE_AND_LIST_ARGS_CASES=' |
208 | case '\'p\'': | |
209 | no_pipeline_knowledge = 1; | |
210 | break; | |
252b5132 | 211 | |
41392f03 AM |
212 | case OPTION_THUMB_ENTRY: |
213 | thumb_entry_symbol = optarg; | |
214 | break; | |
e489d0ae PB |
215 | |
216 | case OPTION_BE8: | |
217 | byteswap_code = 1; | |
218 | break; | |
41392f03 | 219 | ' |
252b5132 | 220 | |
41392f03 AM |
221 | # We have our own after_open and before_allocation functions, but they call |
222 | # the standard routines, so give them a different name. | |
223 | LDEMUL_AFTER_OPEN=arm_elf_after_open | |
224 | LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation | |
252b5132 | 225 | |
41392f03 AM |
226 | # Replace the elf before_parse function with our own. |
227 | LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse | |
252b5132 | 228 | |
41392f03 | 229 | # Call the extra arm-elf function |
a48ca7f2 | 230 | LDEMUL_FINISH=arm_elf_finish |