Commit | Line | Data |
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252b5132 | 1 | # This shell script emits a C file. -*- C -*- |
a2b64bed | 2 | # Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000 |
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${EMULATION_NAME}.c <<EOF | |
7ca69e9e | 26 | |
7ca69e9e | 27 | static int no_pipeline_knowledge = 0; |
41392f03 | 28 | static char *thumb_entry_symbol = NULL; |
7ca69e9e | 29 | |
252b5132 RH |
30 | |
31 | static void | |
32 | gld${EMULATION_NAME}_before_parse () | |
33 | { | |
34 | #ifndef TARGET_ /* I.e., if not generic. */ | |
35 | ldfile_set_output_arch ("`echo ${ARCH}`"); | |
36 | #endif /* not TARGET_ */ | |
31ce0628 NC |
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 | |
41392f03 | 42 | static void arm_elf_after_open PARAMS((void)); |
1220a729 NC |
43 | |
44 | static void | |
41392f03 | 45 | arm_elf_after_open () |
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 | { | |
60 | /* The interworking bfd must be the last one to be processed */ | |
61 | if (!is->next) | |
62 | bfd_elf32_arm_get_bfd_for_interworking (is->the_bfd, & link_info); | |
63 | } | |
64 | } | |
65 | ||
41392f03 AM |
66 | /* Call the standard elf routine. */ |
67 | gld${EMULATION_NAME}_after_open (); | |
1220a729 NC |
68 | } |
69 | ||
1220a729 | 70 | |
41392f03 | 71 | static void arm_elf_before_allocation PARAMS ((void)); |
1220a729 NC |
72 | |
73 | static void | |
41392f03 | 74 | arm_elf_before_allocation () |
1220a729 | 75 | { |
41392f03 AM |
76 | /* Call the standard elf routine. */ |
77 | gld${EMULATION_NAME}_before_allocation (); | |
1220a729 | 78 | |
41392f03 | 79 | /* We should be able to set the size of the interworking stub section */ |
252b5132 RH |
80 | |
81 | /* Here we rummage through the found bfds to collect glue information */ | |
82 | /* FIXME: should this be based on a command line option? krk@cygnus.com */ | |
83 | { | |
84 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
85 | { | |
7ca69e9e NC |
86 | if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, & link_info, |
87 | no_pipeline_knowledge)) | |
252b5132 RH |
88 | { |
89 | /* xgettext:c-format */ | |
90 | einfo (_("Errors encountered processing file %s"), is->filename); | |
91 | } | |
92 | } | |
93 | } | |
94 | ||
95 | /* We have seen it all. Allocate it, and carry on */ | |
96 | bfd_elf32_arm_allocate_interworking_sections (& link_info); | |
97 | } | |
98 | ||
41392f03 AM |
99 | |
100 | static void gld${EMULATION_NAME}_finish PARAMS ((void)); | |
101 | ||
6f798e5c NC |
102 | static void |
103 | gld${EMULATION_NAME}_finish PARAMS((void)) | |
104 | { | |
105 | struct bfd_link_hash_entry * h; | |
106 | ||
107 | if (thumb_entry_symbol == NULL) | |
108 | return; | |
109 | ||
41392f03 AM |
110 | h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, |
111 | false, false, true); | |
6f798e5c NC |
112 | |
113 | if (h != (struct bfd_link_hash_entry *) NULL | |
114 | && (h->type == bfd_link_hash_defined | |
115 | || h->type == bfd_link_hash_defweak) | |
116 | && h->u.def.section->output_section != NULL) | |
117 | { | |
118 | static char buffer[32]; | |
119 | bfd_vma val; | |
120 | ||
121 | /* Special procesing is required for a Thumb entry symbol. The | |
122 | bottom bit of its address must be set. */ | |
123 | val = (h->u.def.value | |
124 | + bfd_get_section_vma (output_bfd, | |
125 | h->u.def.section->output_section) | |
126 | + h->u.def.section->output_offset); | |
127 | ||
128 | val |= 1; | |
129 | ||
130 | /* Now convert this value into a string and store it in entry_symbol | |
131 | where the lang_finish() function will pick it up. */ | |
132 | buffer[0] = '0'; | |
133 | buffer[1] = 'x'; | |
134 | ||
135 | sprintf_vma (buffer + 2, val); | |
136 | ||
137 | if (entry_symbol != NULL && entry_from_cmdline) | |
138 | einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), | |
139 | thumb_entry_symbol, entry_symbol); | |
140 | entry_symbol = buffer; | |
141 | } | |
142 | else | |
41392f03 AM |
143 | einfo (_("%P: warning: connot find thumb start symbol %s\n"), |
144 | thumb_entry_symbol); | |
6f798e5c NC |
145 | } |
146 | ||
252b5132 RH |
147 | EOF |
148 | ||
41392f03 AM |
149 | # Define some shell vars to insert bits of code into the standard elf |
150 | # parse_args and list_options functions. | |
151 | # | |
152 | PARSE_AND_LIST_PROLOGUE=' | |
153 | #define OPTION_THUMB_ENTRY 301 | |
154 | ' | |
252b5132 | 155 | |
41392f03 | 156 | PARSE_AND_LIST_SHORTOPTS=p |
252b5132 | 157 | |
41392f03 AM |
158 | PARSE_AND_LIST_LONGOPTS=' |
159 | { "no-pipeline-knowledge", no_argument, NULL, '\'p\''}, | |
160 | { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, | |
161 | ' | |
252b5132 | 162 | |
41392f03 AM |
163 | PARSE_AND_LIST_OPTIONS=' |
164 | fprintf (file, _(" -p --no-pipeline-knowledge Stop the linker knowing about the pipeline length\n")); | |
165 | fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); | |
166 | ' | |
252b5132 | 167 | |
41392f03 AM |
168 | PARSE_AND_LIST_ARGS_CASES=' |
169 | case '\'p\'': | |
170 | no_pipeline_knowledge = 1; | |
171 | break; | |
252b5132 | 172 | |
41392f03 AM |
173 | case OPTION_THUMB_ENTRY: |
174 | thumb_entry_symbol = optarg; | |
175 | break; | |
176 | ' | |
252b5132 | 177 | |
41392f03 AM |
178 | # We have our own after_open and before_allocation functions, but they call |
179 | # the standard routines, so give them a different name. | |
180 | LDEMUL_AFTER_OPEN=arm_elf_after_open | |
181 | LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation | |
252b5132 | 182 | |
41392f03 AM |
183 | # Replace the elf before_parse function with our own. |
184 | LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse | |
252b5132 | 185 | |
41392f03 AM |
186 | # Call the extra arm-elf function |
187 | LDEMUL_FINISH=gld${EMULATION_NAME}_finish |