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