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252b5132 RH |
1 | # This shell script emits a C file. -*- C -*- |
2 | # It does some substitutions. | |
3 | cat >e${EMULATION_NAME}.c <<EOF | |
4 | /* This file is is generated by a shell script. DO NOT EDIT! */ | |
5 | ||
6 | /* Linux a.out emulation code for ${EMULATION_NAME} | |
a2b64bed | 7 | Copyright 1991, 1993, 1994, 1995, 1996, 1998, 1999, 2000 |
b71e2778 | 8 | Free Software Foundation, Inc. |
252b5132 RH |
9 | Written by Steve Chamberlain <sac@cygnus.com> |
10 | Linux support by Eric Youngdale <ericy@cais.cais.com> | |
11 | ||
12 | This file is part of GLD, the Gnu Linker. | |
13 | ||
14 | This program is free software; you can redistribute it and/or modify | |
15 | it under the terms of the GNU General Public License as published by | |
16 | the Free Software Foundation; either version 2 of the License, or | |
17 | (at your option) any later version. | |
18 | ||
19 | This program is distributed in the hope that it will be useful, | |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
23 | ||
24 | You should have received a copy of the GNU General Public License | |
25 | along with this program; if not, write to the Free Software | |
26 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
27 | ||
28 | #define TARGET_IS_${EMULATION_NAME} | |
29 | ||
30 | #include "bfd.h" | |
31 | #include "sysdep.h" | |
32 | #include "bfdlink.h" | |
33 | ||
34 | #include "ld.h" | |
35 | #include "ldmain.h" | |
252b5132 RH |
36 | #include "ldmisc.h" |
37 | #include "ldexp.h" | |
38 | #include "ldlang.h" | |
b71e2778 AM |
39 | #include "ldfile.h" |
40 | #include "ldemul.h" | |
252b5132 RH |
41 | |
42 | static void gld${EMULATION_NAME}_before_parse PARAMS ((void)); | |
43 | static boolean gld${EMULATION_NAME}_open_dynamic_archive | |
44 | PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *)); | |
45 | static void gld${EMULATION_NAME}_find_address_statement | |
46 | PARAMS ((lang_statement_union_type *)); | |
47 | static void gld${EMULATION_NAME}_create_output_section_statements | |
48 | PARAMS ((void)); | |
49 | static void gld${EMULATION_NAME}_before_allocation PARAMS ((void)); | |
50 | static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile)); | |
51 | ||
52 | static void | |
53 | gld${EMULATION_NAME}_before_parse() | |
54 | { | |
55 | ldfile_output_architecture = bfd_arch_${ARCH}; | |
56 | config.dynamic_link = true; | |
57 | config.has_shared = true; | |
58 | } | |
59 | ||
60 | /* Try to open a dynamic archive. This is where we know that Linux | |
61 | dynamic libraries have an extension of .sa. */ | |
62 | ||
63 | static boolean | |
64 | gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry) | |
65 | const char *arch; | |
66 | search_dirs_type *search; | |
67 | lang_input_statement_type *entry; | |
68 | { | |
69 | char *string; | |
70 | ||
71 | if (! entry->is_archive) | |
72 | return false; | |
73 | ||
74 | string = (char *) xmalloc (strlen (search->name) | |
75 | + strlen (entry->filename) | |
76 | + strlen (arch) | |
77 | + sizeof "/lib.sa"); | |
78 | ||
79 | sprintf (string, "%s/lib%s%s.sa", search->name, entry->filename, arch); | |
80 | ||
81 | if (! ldfile_try_open_bfd (string, entry)) | |
82 | { | |
83 | free (string); | |
84 | return false; | |
85 | } | |
86 | ||
87 | entry->filename = string; | |
88 | ||
89 | return true; | |
90 | } | |
91 | ||
92 | /* This is called by the create_output_section_statements routine via | |
93 | lang_for_each_statement. It locates any address assignment to | |
94 | .text, and modifies it to include the size of the headers. This | |
95 | causes -Ttext to mean the starting address of the header, rather | |
96 | than the starting address of .text, which is compatible with other | |
97 | Linux tools. */ | |
98 | ||
99 | static void | |
100 | gld${EMULATION_NAME}_find_address_statement (s) | |
101 | lang_statement_union_type *s; | |
102 | { | |
103 | if (s->header.type == lang_address_statement_enum | |
104 | && strcmp (s->address_statement.section_name, ".text") == 0) | |
105 | { | |
106 | ASSERT (s->address_statement.address->type.node_class == etree_value); | |
107 | s->address_statement.address->value.value += 0x20; | |
108 | } | |
109 | } | |
110 | ||
111 | /* This is called before opening the input BFD's. */ | |
112 | ||
113 | static void | |
114 | gld${EMULATION_NAME}_create_output_section_statements () | |
115 | { | |
116 | lang_for_each_statement (gld${EMULATION_NAME}_find_address_statement); | |
117 | } | |
118 | ||
119 | /* This is called after the sections have been attached to output | |
120 | sections, but before any sizes or addresses have been set. */ | |
121 | ||
122 | static void | |
123 | gld${EMULATION_NAME}_before_allocation () | |
124 | { | |
125 | if (link_info.relocateable) | |
126 | return; | |
127 | ||
128 | /* Let the backend work out the sizes of any sections required by | |
129 | dynamic linking. */ | |
130 | if (! bfd_${EMULATION_NAME}_size_dynamic_sections (output_bfd, &link_info)) | |
131 | einfo ("%P%F: failed to set dynamic section sizes: %E\n"); | |
132 | } | |
133 | ||
134 | static char * | |
135 | gld${EMULATION_NAME}_get_script(isfile) | |
136 | int *isfile; | |
137 | EOF | |
138 | ||
139 | if test -n "$COMPILE_IN" | |
140 | then | |
141 | # Scripts compiled in. | |
142 | ||
143 | # sed commands to quote an ld script as a C string. | |
597e2591 | 144 | sc="-f stringify.sed" |
252b5132 RH |
145 | |
146 | cat >>e${EMULATION_NAME}.c <<EOF | |
147 | { | |
148 | *isfile = 0; | |
149 | ||
150 | if (link_info.relocateable == true && config.build_constructors == true) | |
597e2591 | 151 | return |
252b5132 | 152 | EOF |
597e2591 ILT |
153 | sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c |
154 | echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c | |
155 | sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c | |
156 | echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c | |
157 | sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c | |
158 | echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c | |
159 | sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c | |
160 | echo ' ; else return' >> e${EMULATION_NAME}.c | |
161 | sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c | |
162 | echo '; }' >> e${EMULATION_NAME}.c | |
252b5132 RH |
163 | |
164 | else | |
165 | # Scripts read from the filesystem. | |
166 | ||
167 | cat >>e${EMULATION_NAME}.c <<EOF | |
168 | { | |
169 | *isfile = 1; | |
170 | ||
171 | if (link_info.relocateable == true && config.build_constructors == true) | |
172 | return "ldscripts/${EMULATION_NAME}.xu"; | |
173 | else if (link_info.relocateable == true) | |
174 | return "ldscripts/${EMULATION_NAME}.xr"; | |
175 | else if (!config.text_read_only) | |
176 | return "ldscripts/${EMULATION_NAME}.xbn"; | |
177 | else if (!config.magic_demand_paged) | |
178 | return "ldscripts/${EMULATION_NAME}.xn"; | |
179 | else | |
180 | return "ldscripts/${EMULATION_NAME}.x"; | |
181 | } | |
182 | EOF | |
183 | ||
184 | fi | |
185 | ||
186 | cat >>e${EMULATION_NAME}.c <<EOF | |
187 | ||
188 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = | |
189 | { | |
190 | gld${EMULATION_NAME}_before_parse, | |
191 | syslib_default, | |
192 | hll_default, | |
193 | after_parse_default, | |
194 | after_open_default, | |
195 | after_allocation_default, | |
196 | set_output_arch_default, | |
197 | ldemul_default_target, | |
198 | gld${EMULATION_NAME}_before_allocation, | |
199 | gld${EMULATION_NAME}_get_script, | |
200 | "${EMULATION_NAME}", | |
201 | "${OUTPUT_FORMAT}", | |
e1c47aa4 | 202 | NULL, /* finish */ |
252b5132 | 203 | gld${EMULATION_NAME}_create_output_section_statements, |
49bdcdba | 204 | gld${EMULATION_NAME}_open_dynamic_archive, |
e1c47aa4 AM |
205 | NULL, /* place orphan */ |
206 | NULL, /* set symbols */ | |
207 | NULL, /* parse args */ | |
208 | NULL, /* unrecognized file */ | |
209 | NULL, /* list options */ | |
40d109bf AM |
210 | NULL, /* recognized file */ |
211 | NULL /* find_potential_libraries */ | |
252b5132 RH |
212 | }; |
213 | EOF |