Commit | Line | Data |
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252b5132 | 1 | # This shell script emits a C file. -*- C -*- |
aef6203b AM |
2 | # Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
3 | # 2004, 2005 | |
41392f03 AM |
4 | # Free Software Foundation, Inc. |
5 | # | |
6 | # This file is part of GLD, the Gnu Linker. | |
7 | # | |
8 | # This program is free software; you can redistribute it and/or modify | |
9 | # it under the terms of the GNU General Public License as published by | |
10 | # the Free Software Foundation; either version 2 of the License, or | |
11 | # (at your option) any later version. | |
12 | # | |
13 | # This program is distributed in the hope that it will be useful, | |
14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | # GNU General Public License for more details. | |
17 | # | |
18 | # You should have received a copy of the GNU General Public License | |
19 | # along with this program; if not, write to the Free Software | |
75be928b | 20 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. |
41392f03 AM |
21 | # |
22 | ||
23 | # This file is sourced from elf32.em, and defines extra arm-elf | |
24 | # specific routines. | |
25 | # | |
a82644e2 | 26 | test -z "$TARGET2_TYPE" && TARGET2_TYPE="rel" |
41392f03 | 27 | cat >>e${EMULATION_NAME}.c <<EOF |
7ca69e9e | 28 | |
1d022697 PB |
29 | #include "elf/arm.h" |
30 | ||
88f7bcd5 NC |
31 | static char *thumb_entry_symbol = NULL; |
32 | static bfd *bfd_for_interwork; | |
e489d0ae | 33 | static int byteswap_code = 0; |
9c504268 | 34 | static int target1_is_rel = 0${TARGET1_IS_REL}; |
3674e28a | 35 | static char *target2_type = "${TARGET2_TYPE}"; |
319850b4 | 36 | static int fix_v4bx = 0; |
33bfe774 | 37 | static int use_blx = 0; |
7ca69e9e | 38 | |
252b5132 | 39 | static void |
0c7a8e5a | 40 | gld${EMULATION_NAME}_before_parse (void) |
252b5132 RH |
41 | { |
42 | #ifndef TARGET_ /* I.e., if not generic. */ | |
5e2f1575 | 43 | ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); |
252b5132 | 44 | #endif /* not TARGET_ */ |
b34976b6 AM |
45 | config.dynamic_link = ${DYNAMIC_LINK-TRUE}; |
46 | config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`; | |
252b5132 RH |
47 | } |
48 | ||
1220a729 | 49 | static void |
0c7a8e5a | 50 | arm_elf_after_open (void) |
1220a729 | 51 | { |
f11523b0 | 52 | if (strstr (bfd_get_target (output_bfd), "arm") == NULL) |
1220a729 | 53 | { |
f11523b0 NC |
54 | /* The arm backend needs special fields in the output hash structure. |
55 | These will only be created if the output format is an arm format, | |
56 | hence we do not support linking and changing output formats at the | |
57 | same time. Use a link followed by objcopy to change output formats. */ | |
58 | einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n"); | |
59 | return; | |
1220a729 NC |
60 | } |
61 | ||
f11523b0 NC |
62 | { |
63 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
64 | { | |
8afb0e02 | 65 | bfd_elf32_arm_add_glue_sections_to_bfd (is->the_bfd, & link_info); |
f11523b0 NC |
66 | } |
67 | } | |
68 | ||
41392f03 AM |
69 | /* Call the standard elf routine. */ |
70 | gld${EMULATION_NAME}_after_open (); | |
1220a729 NC |
71 | } |
72 | ||
8afb0e02 | 73 | static void |
0c7a8e5a | 74 | arm_elf_set_bfd_for_interworking (lang_statement_union_type *statement) |
8afb0e02 | 75 | { |
7b986e99 | 76 | if (statement->header.type == lang_input_section_enum) |
8afb0e02 | 77 | { |
88f7bcd5 | 78 | asection *i = statement->input_section.section; |
8afb0e02 | 79 | |
7b986e99 AM |
80 | if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag |
81 | && (i->flags & SEC_EXCLUDE) == 0) | |
8afb0e02 | 82 | { |
7b986e99 AM |
83 | asection *output_section = i->output_section; |
84 | ||
85 | ASSERT (output_section->owner == output_bfd); | |
86 | ||
87 | /* Don't attach the interworking stubs to a dynamic object, to | |
88 | an empty section, etc. */ | |
89 | if ((output_section->flags & SEC_HAS_CONTENTS) != 0 | |
90 | && (i->flags & SEC_NEVER_LOAD) == 0 | |
91 | && ! (i->owner->flags & DYNAMIC) | |
92 | && ! i->owner->output_has_begun) | |
93 | { | |
94 | bfd_for_interwork = i->owner; | |
95 | bfd_for_interwork->output_has_begun = TRUE; | |
96 | } | |
8afb0e02 NC |
97 | } |
98 | } | |
99 | } | |
1220a729 | 100 | |
1220a729 | 101 | static void |
0c7a8e5a | 102 | arm_elf_before_allocation (void) |
1220a729 | 103 | { |
88f7bcd5 | 104 | bfd *tem; |
8afb0e02 | 105 | |
2004afbc NC |
106 | if (link_info.input_bfds != NULL) |
107 | { | |
108 | /* The interworking bfd must be the last one in the link. */ | |
109 | bfd_for_interwork = NULL; | |
110 | for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) | |
b34976b6 | 111 | tem->output_has_begun = FALSE; |
252b5132 | 112 | |
2004afbc | 113 | lang_for_each_statement (arm_elf_set_bfd_for_interworking); |
2004afbc | 114 | for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) |
b34976b6 | 115 | tem->output_has_begun = FALSE; |
8afb0e02 | 116 | |
06aa7234 NC |
117 | /* If bfd_for_interwork is NULL, then there are no loadable sections |
118 | with real contents to be linked, so we are not going to have to | |
119 | create any interworking stubs, so it is OK not to call | |
120 | bfd_elf32_arm_get_bfd_for_interworking. */ | |
121 | if (bfd_for_interwork != NULL) | |
122 | bfd_elf32_arm_get_bfd_for_interworking (bfd_for_interwork, &link_info); | |
2004afbc | 123 | } |
8afb0e02 | 124 | |
d504ffc8 DJ |
125 | bfd_elf32_arm_set_byteswap_code (&link_info, byteswap_code); |
126 | ||
127 | /* We should be able to set the size of the interworking stub section. We | |
128 | can't do it until later if we have dynamic sections, though. */ | |
129 | if (! elf_hash_table (&link_info)->dynamic_sections_created) | |
130 | { | |
131 | /* Here we rummage through the found bfds to collect glue information. */ | |
132 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
133 | { | |
134 | if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, | |
135 | &link_info)) | |
252b5132 RH |
136 | /* xgettext:c-format */ |
137 | einfo (_("Errors encountered processing file %s"), is->filename); | |
d504ffc8 DJ |
138 | } |
139 | } | |
252b5132 | 140 | |
063d4ee1 AM |
141 | /* Call the standard elf routine. */ |
142 | gld${EMULATION_NAME}_before_allocation (); | |
143 | ||
8afb0e02 | 144 | /* We have seen it all. Allocate it, and carry on. */ |
252b5132 RH |
145 | bfd_elf32_arm_allocate_interworking_sections (& link_info); |
146 | } | |
147 | ||
6f798e5c | 148 | static void |
0c7a8e5a | 149 | arm_elf_finish (void) |
6f798e5c NC |
150 | { |
151 | struct bfd_link_hash_entry * h; | |
152 | ||
c56feb2b AM |
153 | /* Call the elf32.em routine. */ |
154 | gld${EMULATION_NAME}_finish (); | |
155 | ||
1d022697 PB |
156 | if (thumb_entry_symbol) |
157 | { | |
158 | h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, | |
159 | FALSE, FALSE, TRUE); | |
160 | } | |
161 | else | |
162 | { | |
163 | struct elf_link_hash_entry * eh; | |
164 | ||
165 | if (!entry_symbol.name) | |
166 | return; | |
167 | ||
168 | h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name, | |
169 | FALSE, FALSE, TRUE); | |
170 | eh = (struct elf_link_hash_entry *)h; | |
171 | if (!h || ELF_ST_TYPE(eh->type) != STT_ARM_TFUNC) | |
172 | return; | |
173 | } | |
0c7a8e5a | 174 | |
6f798e5c NC |
175 | |
176 | if (h != (struct bfd_link_hash_entry *) NULL | |
177 | && (h->type == bfd_link_hash_defined | |
178 | || h->type == bfd_link_hash_defweak) | |
179 | && h->u.def.section->output_section != NULL) | |
180 | { | |
181 | static char buffer[32]; | |
88f7bcd5 | 182 | bfd_vma val; |
0c7a8e5a | 183 | |
88f7bcd5 NC |
184 | /* Special procesing is required for a Thumb entry symbol. The |
185 | bottom bit of its address must be set. */ | |
186 | val = (h->u.def.value | |
187 | + bfd_get_section_vma (output_bfd, | |
188 | h->u.def.section->output_section) | |
189 | + h->u.def.section->output_offset); | |
0c7a8e5a | 190 | |
88f7bcd5 | 191 | val |= 1; |
6f798e5c | 192 | |
88f7bcd5 | 193 | /* Now convert this value into a string and store it in entry_symbol |
0c7a8e5a | 194 | where the lang_finish() function will pick it up. */ |
88f7bcd5 NC |
195 | buffer[0] = '0'; |
196 | buffer[1] = 'x'; | |
0c7a8e5a | 197 | |
88f7bcd5 | 198 | sprintf_vma (buffer + 2, val); |
6f798e5c | 199 | |
1d022697 PB |
200 | if (thumb_entry_symbol != NULL && entry_symbol.name != NULL |
201 | && entry_from_cmdline) | |
88f7bcd5 NC |
202 | einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), |
203 | thumb_entry_symbol, entry_symbol.name); | |
204 | entry_symbol.name = buffer; | |
6f798e5c | 205 | } |
88f7bcd5 NC |
206 | else |
207 | einfo (_("%P: warning: connot find thumb start symbol %s\n"), | |
208 | thumb_entry_symbol); | |
6f798e5c NC |
209 | } |
210 | ||
3674e28a PB |
211 | /* This is a convenitent point to tell BFD about target specific flags. |
212 | After the output has been created, but before inputs are read. */ | |
213 | static void | |
214 | arm_elf_create_output_section_statements (void) | |
215 | { | |
319850b4 | 216 | bfd_elf32_arm_set_target_relocs (&link_info, target1_is_rel, target2_type, |
33bfe774 | 217 | fix_v4bx, use_blx); |
3674e28a PB |
218 | } |
219 | ||
252b5132 RH |
220 | EOF |
221 | ||
41392f03 AM |
222 | # Define some shell vars to insert bits of code into the standard elf |
223 | # parse_args and list_options functions. | |
224 | # | |
225 | PARSE_AND_LIST_PROLOGUE=' | |
226 | #define OPTION_THUMB_ENTRY 301 | |
e489d0ae | 227 | #define OPTION_BE8 302 |
9c504268 PB |
228 | #define OPTION_TARGET1_REL 303 |
229 | #define OPTION_TARGET1_ABS 304 | |
3674e28a | 230 | #define OPTION_TARGET2 305 |
33bfe774 JB |
231 | #define OPTION_FIX_V4BX 306 |
232 | #define OPTION_USE_BLX 307 | |
41392f03 | 233 | ' |
252b5132 | 234 | |
ef5bdbd1 | 235 | PARSE_AND_LIST_SHORTOPTS=p |
252b5132 | 236 | |
41392f03 AM |
237 | PARSE_AND_LIST_LONGOPTS=' |
238 | { "no-pipeline-knowledge", no_argument, NULL, '\'p\''}, | |
239 | { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, | |
e489d0ae | 240 | { "be8", no_argument, NULL, OPTION_BE8}, |
9c504268 PB |
241 | { "target1-rel", no_argument, NULL, OPTION_TARGET1_REL}, |
242 | { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS}, | |
3674e28a | 243 | { "target2", required_argument, NULL, OPTION_TARGET2}, |
319850b4 | 244 | { "fix-v4bx", no_argument, NULL, OPTION_FIX_V4BX}, |
33bfe774 | 245 | { "use-blx", no_argument, NULL, OPTION_USE_BLX}, |
41392f03 | 246 | ' |
252b5132 | 247 | |
41392f03 | 248 | PARSE_AND_LIST_OPTIONS=' |
41392f03 | 249 | fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); |
e489d0ae | 250 | fprintf (file, _(" --be8 Oputput BE8 format image\n")); |
3674e28a PB |
251 | fprintf (file, _(" --target1=rel Interpret R_ARM_TARGET1 as R_ARM_REL32\n")); |
252 | fprintf (file, _(" --target1=abs Interpret R_ARM_TARGET1 as R_ARM_ABS32\n")); | |
253 | fprintf (file, _(" --target2=<type> Specify definition of R_ARM_TARGET2\n")); | |
319850b4 | 254 | fprintf (file, _(" --fix-v4bx Rewrite BX rn as MOV pc, rn for ARMv4\n")); |
33bfe774 | 255 | fprintf (file, _(" --use-blx Enable use of BLX instructions\n")); |
41392f03 | 256 | ' |
252b5132 | 257 | |
41392f03 AM |
258 | PARSE_AND_LIST_ARGS_CASES=' |
259 | case '\'p\'': | |
dea514f5 | 260 | /* Only here for backwards compatibility. */ |
41392f03 | 261 | break; |
252b5132 | 262 | |
41392f03 AM |
263 | case OPTION_THUMB_ENTRY: |
264 | thumb_entry_symbol = optarg; | |
265 | break; | |
e489d0ae PB |
266 | |
267 | case OPTION_BE8: | |
268 | byteswap_code = 1; | |
269 | break; | |
9c504268 PB |
270 | |
271 | case OPTION_TARGET1_REL: | |
272 | target1_is_rel = 1; | |
273 | break; | |
274 | ||
275 | case OPTION_TARGET1_ABS: | |
276 | target1_is_rel = 0; | |
277 | break; | |
3674e28a PB |
278 | |
279 | case OPTION_TARGET2: | |
280 | target2_type = optarg; | |
281 | break; | |
319850b4 JB |
282 | |
283 | case OPTION_FIX_V4BX: | |
284 | fix_v4bx = 1; | |
285 | break; | |
33bfe774 JB |
286 | |
287 | case OPTION_USE_BLX: | |
288 | use_blx = 1; | |
289 | break; | |
41392f03 | 290 | ' |
252b5132 | 291 | |
41392f03 AM |
292 | # We have our own after_open and before_allocation functions, but they call |
293 | # the standard routines, so give them a different name. | |
294 | LDEMUL_AFTER_OPEN=arm_elf_after_open | |
295 | LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation | |
3674e28a | 296 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=arm_elf_create_output_section_statements |
252b5132 | 297 | |
41392f03 AM |
298 | # Replace the elf before_parse function with our own. |
299 | LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse | |
252b5132 | 300 | |
41392f03 | 301 | # Call the extra arm-elf function |
a48ca7f2 | 302 | LDEMUL_FINISH=arm_elf_finish |