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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 | # | |
3674e28a | 25 | test -z $TARGET2_TYPE && TARGET2_TYPE="rel" |
41392f03 | 26 | cat >>e${EMULATION_NAME}.c <<EOF |
7ca69e9e | 27 | |
88f7bcd5 NC |
28 | static char *thumb_entry_symbol = NULL; |
29 | static bfd *bfd_for_interwork; | |
e489d0ae | 30 | static int byteswap_code = 0; |
9c504268 | 31 | static int target1_is_rel = 0${TARGET1_IS_REL}; |
3674e28a | 32 | static char *target2_type = "${TARGET2_TYPE}"; |
7ca69e9e | 33 | |
252b5132 | 34 | static void |
0c7a8e5a | 35 | gld${EMULATION_NAME}_before_parse (void) |
252b5132 RH |
36 | { |
37 | #ifndef TARGET_ /* I.e., if not generic. */ | |
5e2f1575 | 38 | ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); |
252b5132 | 39 | #endif /* not TARGET_ */ |
b34976b6 AM |
40 | config.dynamic_link = ${DYNAMIC_LINK-TRUE}; |
41 | config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`; | |
252b5132 RH |
42 | } |
43 | ||
1220a729 | 44 | static void |
0c7a8e5a | 45 | arm_elf_after_open (void) |
1220a729 | 46 | { |
f11523b0 | 47 | if (strstr (bfd_get_target (output_bfd), "arm") == NULL) |
1220a729 | 48 | { |
f11523b0 NC |
49 | /* The arm backend needs special fields in the output hash structure. |
50 | These will only be created if the output format is an arm format, | |
51 | hence we do not support linking and changing output formats at the | |
52 | same time. Use a link followed by objcopy to change output formats. */ | |
53 | einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n"); | |
54 | return; | |
1220a729 NC |
55 | } |
56 | ||
f11523b0 NC |
57 | { |
58 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
59 | { | |
8afb0e02 | 60 | bfd_elf32_arm_add_glue_sections_to_bfd (is->the_bfd, & link_info); |
f11523b0 NC |
61 | } |
62 | } | |
63 | ||
41392f03 AM |
64 | /* Call the standard elf routine. */ |
65 | gld${EMULATION_NAME}_after_open (); | |
1220a729 NC |
66 | } |
67 | ||
8afb0e02 | 68 | static void |
0c7a8e5a | 69 | arm_elf_set_bfd_for_interworking (lang_statement_union_type *statement) |
8afb0e02 NC |
70 | { |
71 | if (statement->header.type == lang_input_section_enum | |
57ceae94 AM |
72 | && !statement->input_section.ifile->just_syms_flag |
73 | && (statement->input_section.section->flags & SEC_EXCLUDE) == 0) | |
8afb0e02 | 74 | { |
88f7bcd5 NC |
75 | asection *i = statement->input_section.section; |
76 | asection *output_section = i->output_section; | |
8afb0e02 NC |
77 | |
78 | ASSERT (output_section->owner == output_bfd); | |
79 | ||
b7693d02 DJ |
80 | /* Don't attach the interworking stubs to a dynamic object, to |
81 | an empty section, etc. */ | |
8afb0e02 NC |
82 | if ((output_section->flags & SEC_HAS_CONTENTS) != 0 |
83 | && (i->flags & SEC_NEVER_LOAD) == 0 | |
b7693d02 | 84 | && ! (i->owner->flags & DYNAMIC) |
8afb0e02 NC |
85 | && ! i->owner->output_has_begun) |
86 | { | |
87 | bfd_for_interwork = i->owner; | |
b34976b6 | 88 | bfd_for_interwork->output_has_begun = TRUE; |
8afb0e02 NC |
89 | } |
90 | } | |
91 | } | |
1220a729 | 92 | |
1220a729 | 93 | static void |
0c7a8e5a | 94 | arm_elf_before_allocation (void) |
1220a729 | 95 | { |
88f7bcd5 | 96 | bfd *tem; |
8afb0e02 | 97 | |
41392f03 AM |
98 | /* Call the standard elf routine. */ |
99 | gld${EMULATION_NAME}_before_allocation (); | |
1220a729 | 100 | |
2004afbc NC |
101 | if (link_info.input_bfds != NULL) |
102 | { | |
103 | /* The interworking bfd must be the last one in the link. */ | |
104 | bfd_for_interwork = NULL; | |
105 | for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) | |
b34976b6 | 106 | tem->output_has_begun = FALSE; |
252b5132 | 107 | |
2004afbc | 108 | lang_for_each_statement (arm_elf_set_bfd_for_interworking); |
2004afbc | 109 | for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) |
b34976b6 | 110 | tem->output_has_begun = FALSE; |
8afb0e02 | 111 | |
06aa7234 NC |
112 | /* If bfd_for_interwork is NULL, then there are no loadable sections |
113 | with real contents to be linked, so we are not going to have to | |
114 | create any interworking stubs, so it is OK not to call | |
115 | bfd_elf32_arm_get_bfd_for_interworking. */ | |
116 | if (bfd_for_interwork != NULL) | |
117 | bfd_elf32_arm_get_bfd_for_interworking (bfd_for_interwork, &link_info); | |
2004afbc | 118 | } |
8afb0e02 NC |
119 | /* We should be able to set the size of the interworking stub section. */ |
120 | ||
121 | /* Here we rummage through the found bfds to collect glue information. */ | |
122 | /* FIXME: should this be based on a command line option? krk@cygnus.com */ | |
252b5132 RH |
123 | { |
124 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
125 | { | |
7ca69e9e | 126 | if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, & link_info, |
3674e28a | 127 | byteswap_code)) |
252b5132 RH |
128 | { |
129 | /* xgettext:c-format */ | |
130 | einfo (_("Errors encountered processing file %s"), is->filename); | |
131 | } | |
132 | } | |
133 | } | |
134 | ||
8afb0e02 | 135 | /* We have seen it all. Allocate it, and carry on. */ |
252b5132 RH |
136 | bfd_elf32_arm_allocate_interworking_sections (& link_info); |
137 | } | |
138 | ||
6f798e5c | 139 | static void |
0c7a8e5a | 140 | arm_elf_finish (void) |
6f798e5c NC |
141 | { |
142 | struct bfd_link_hash_entry * h; | |
143 | ||
c56feb2b AM |
144 | /* Call the elf32.em routine. */ |
145 | gld${EMULATION_NAME}_finish (); | |
146 | ||
88f7bcd5 NC |
147 | if (thumb_entry_symbol == NULL) |
148 | return; | |
0c7a8e5a | 149 | |
88f7bcd5 | 150 | h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, |
b34976b6 | 151 | FALSE, FALSE, TRUE); |
6f798e5c NC |
152 | |
153 | if (h != (struct bfd_link_hash_entry *) NULL | |
154 | && (h->type == bfd_link_hash_defined | |
155 | || h->type == bfd_link_hash_defweak) | |
156 | && h->u.def.section->output_section != NULL) | |
157 | { | |
158 | static char buffer[32]; | |
88f7bcd5 | 159 | bfd_vma val; |
0c7a8e5a | 160 | |
88f7bcd5 NC |
161 | /* Special procesing is required for a Thumb entry symbol. The |
162 | bottom bit of its address must be set. */ | |
163 | val = (h->u.def.value | |
164 | + bfd_get_section_vma (output_bfd, | |
165 | h->u.def.section->output_section) | |
166 | + h->u.def.section->output_offset); | |
0c7a8e5a | 167 | |
88f7bcd5 | 168 | val |= 1; |
6f798e5c | 169 | |
88f7bcd5 | 170 | /* Now convert this value into a string and store it in entry_symbol |
0c7a8e5a | 171 | where the lang_finish() function will pick it up. */ |
88f7bcd5 NC |
172 | buffer[0] = '0'; |
173 | buffer[1] = 'x'; | |
0c7a8e5a | 174 | |
88f7bcd5 | 175 | sprintf_vma (buffer + 2, val); |
6f798e5c | 176 | |
88f7bcd5 NC |
177 | if (entry_symbol.name != NULL && entry_from_cmdline) |
178 | einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), | |
179 | thumb_entry_symbol, entry_symbol.name); | |
180 | entry_symbol.name = buffer; | |
6f798e5c | 181 | } |
88f7bcd5 NC |
182 | else |
183 | einfo (_("%P: warning: connot find thumb start symbol %s\n"), | |
184 | thumb_entry_symbol); | |
6f798e5c NC |
185 | } |
186 | ||
3674e28a PB |
187 | /* This is a convenitent point to tell BFD about target specific flags. |
188 | After the output has been created, but before inputs are read. */ | |
189 | static void | |
190 | arm_elf_create_output_section_statements (void) | |
191 | { | |
192 | bfd_elf32_arm_set_target_relocs (&link_info, target1_is_rel, target2_type); | |
193 | } | |
194 | ||
252b5132 RH |
195 | EOF |
196 | ||
41392f03 AM |
197 | # Define some shell vars to insert bits of code into the standard elf |
198 | # parse_args and list_options functions. | |
199 | # | |
200 | PARSE_AND_LIST_PROLOGUE=' | |
201 | #define OPTION_THUMB_ENTRY 301 | |
e489d0ae | 202 | #define OPTION_BE8 302 |
9c504268 PB |
203 | #define OPTION_TARGET1_REL 303 |
204 | #define OPTION_TARGET1_ABS 304 | |
3674e28a | 205 | #define OPTION_TARGET2 305 |
41392f03 | 206 | ' |
252b5132 | 207 | |
ef5bdbd1 | 208 | PARSE_AND_LIST_SHORTOPTS=p |
252b5132 | 209 | |
41392f03 AM |
210 | PARSE_AND_LIST_LONGOPTS=' |
211 | { "no-pipeline-knowledge", no_argument, NULL, '\'p\''}, | |
212 | { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, | |
e489d0ae | 213 | { "be8", no_argument, NULL, OPTION_BE8}, |
9c504268 PB |
214 | { "target1-rel", no_argument, NULL, OPTION_TARGET1_REL}, |
215 | { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS}, | |
3674e28a | 216 | { "target2", required_argument, NULL, OPTION_TARGET2}, |
41392f03 | 217 | ' |
252b5132 | 218 | |
41392f03 | 219 | PARSE_AND_LIST_OPTIONS=' |
41392f03 | 220 | fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); |
e489d0ae | 221 | fprintf (file, _(" --be8 Oputput BE8 format image\n")); |
3674e28a PB |
222 | fprintf (file, _(" --target1=rel Interpret R_ARM_TARGET1 as R_ARM_REL32\n")); |
223 | fprintf (file, _(" --target1=abs Interpret R_ARM_TARGET1 as R_ARM_ABS32\n")); | |
224 | fprintf (file, _(" --target2=<type> Specify definition of R_ARM_TARGET2\n")); | |
41392f03 | 225 | ' |
252b5132 | 226 | |
41392f03 AM |
227 | PARSE_AND_LIST_ARGS_CASES=' |
228 | case '\'p\'': | |
dea514f5 | 229 | /* Only here for backwards compatibility. */ |
41392f03 | 230 | break; |
252b5132 | 231 | |
41392f03 AM |
232 | case OPTION_THUMB_ENTRY: |
233 | thumb_entry_symbol = optarg; | |
234 | break; | |
e489d0ae PB |
235 | |
236 | case OPTION_BE8: | |
237 | byteswap_code = 1; | |
238 | break; | |
9c504268 PB |
239 | |
240 | case OPTION_TARGET1_REL: | |
241 | target1_is_rel = 1; | |
242 | break; | |
243 | ||
244 | case OPTION_TARGET1_ABS: | |
245 | target1_is_rel = 0; | |
246 | break; | |
3674e28a PB |
247 | |
248 | case OPTION_TARGET2: | |
249 | target2_type = optarg; | |
250 | break; | |
41392f03 | 251 | ' |
252b5132 | 252 | |
41392f03 AM |
253 | # We have our own after_open and before_allocation functions, but they call |
254 | # the standard routines, so give them a different name. | |
255 | LDEMUL_AFTER_OPEN=arm_elf_after_open | |
256 | LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation | |
3674e28a | 257 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=arm_elf_create_output_section_statements |
252b5132 | 258 | |
41392f03 AM |
259 | # Replace the elf before_parse function with our own. |
260 | LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse | |
252b5132 | 261 | |
41392f03 | 262 | # Call the extra arm-elf function |
a48ca7f2 | 263 | LDEMUL_FINISH=arm_elf_finish |