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252b5132 RH |
1 | # This shell script emits a C file. -*- C -*- |
2 | # It does some substitutions. | |
3 | cat >e${EMULATION_NAME}.c <<EOF | |
4 | /* This file is is generated by a shell script. DO NOT EDIT! */ | |
5 | ||
6 | /* Handle embedded relocs for MIPS. | |
b71e2778 | 7 | Copyright 1994, 95, 97, 99, 2000 Free Software Foundation, Inc. |
252b5132 RH |
8 | Written by Ian Lance Taylor <ian@cygnus.com> based on generic.em. |
9 | ||
10 | This file is part of GLD, the Gnu Linker. | |
11 | ||
12 | This program is free software; you can redistribute it and/or modify | |
13 | it under the terms of the GNU General Public License as published by | |
14 | the Free Software Foundation; either version 2 of the License, or | |
15 | (at your option) any later version. | |
16 | ||
17 | This program is distributed in the hope that it will be useful, | |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU General Public License | |
23 | along with this program; if not, write to the Free Software | |
24 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
25 | ||
26 | #define TARGET_IS_${EMULATION_NAME} | |
27 | ||
28 | #include "bfd.h" | |
29 | #include "sysdep.h" | |
30 | #include "bfdlink.h" | |
31 | ||
32 | #include "ld.h" | |
33 | #include "ldmain.h" | |
252b5132 RH |
34 | #include "ldmisc.h" |
35 | ||
b71e2778 AM |
36 | #include "ldexp.h" |
37 | #include "ldlang.h" | |
38 | #include "ldfile.h" | |
39 | #include "ldemul.h" | |
40 | ||
252b5132 RH |
41 | static void gld${EMULATION_NAME}_before_parse PARAMS ((void)); |
42 | static void gld${EMULATION_NAME}_after_open PARAMS ((void)); | |
43 | static void check_sections PARAMS ((bfd *, asection *, PTR)); | |
44 | static void gld${EMULATION_NAME}_after_allocation PARAMS ((void)); | |
45 | static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile)); | |
46 | ||
47 | static void | |
48 | gld${EMULATION_NAME}_before_parse() | |
49 | { | |
50 | #ifndef TARGET_ /* I.e., if not generic. */ | |
51 | ldfile_output_architecture = bfd_arch_${ARCH}; | |
52 | #endif /* not TARGET_ */ | |
53 | } | |
54 | ||
55 | /* This function is run after all the input files have been opened. | |
56 | We create a .rel.sdata section for each input file with a non zero | |
57 | .sdata section. The BFD backend will fill in these sections with | |
58 | magic numbers which can be used to relocate the data section at run | |
59 | time. This will only do the right thing if all the input files | |
60 | have been compiled using -membedded-pic. */ | |
61 | ||
62 | static void | |
63 | gld${EMULATION_NAME}_after_open () | |
64 | { | |
65 | bfd *abfd; | |
66 | ||
67 | if (! command_line.embedded_relocs | |
68 | || link_info.relocateable) | |
69 | return; | |
70 | ||
71 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) | |
72 | { | |
73 | asection *datasec; | |
74 | ||
57a6fd07 DB |
75 | /* As first-order business, make sure that each input BFD is ECOFF. It |
76 | better be, as we are directly calling an ECOFF backend function. */ | |
77 | if (bfd_get_flavour (abfd) != bfd_target_ecoff_flavour) | |
78 | einfo ("%F%B: all input objects must be ECOFF for --embedded-relocs\n"); | |
79 | ||
252b5132 RH |
80 | datasec = bfd_get_section_by_name (abfd, ".sdata"); |
81 | ||
82 | /* Note that we assume that the reloc_count field has already | |
83 | been set up. We could call bfd_get_reloc_upper_bound, but | |
84 | that returns the size of a memory buffer rather than a reloc | |
85 | count. We do not want to call bfd_canonicalize_reloc, | |
86 | because although it would always work it would force us to | |
87 | read in the relocs into BFD canonical form, which would waste | |
88 | a significant amount of time and memory. */ | |
89 | if (datasec != NULL && datasec->reloc_count > 0) | |
90 | { | |
91 | asection *relsec; | |
92 | ||
93 | relsec = bfd_make_section (abfd, ".rel.sdata"); | |
94 | if (relsec == NULL | |
95 | || ! bfd_set_section_flags (abfd, relsec, | |
96 | (SEC_ALLOC | |
97 | | SEC_LOAD | |
98 | | SEC_HAS_CONTENTS | |
99 | | SEC_IN_MEMORY)) | |
100 | || ! bfd_set_section_alignment (abfd, relsec, 2) | |
101 | || ! bfd_set_section_size (abfd, relsec, | |
102 | datasec->reloc_count * 4)) | |
103 | einfo ("%F%B: can not create .rel.sdata section: %E\n"); | |
104 | } | |
105 | ||
106 | /* Double check that all other data sections are empty, as is | |
107 | required for embedded PIC code. */ | |
108 | bfd_map_over_sections (abfd, check_sections, (PTR) datasec); | |
109 | } | |
110 | } | |
111 | ||
112 | /* Check that of the data sections, only the .sdata section has | |
113 | relocs. This is called via bfd_map_over_sections. */ | |
114 | ||
115 | static void | |
116 | check_sections (abfd, sec, sdatasec) | |
117 | bfd *abfd; | |
118 | asection *sec; | |
119 | PTR sdatasec; | |
120 | { | |
121 | if ((bfd_get_section_flags (abfd, sec) & SEC_CODE) == 0 | |
122 | && sec != (asection *) sdatasec | |
123 | && sec->reloc_count != 0) | |
57a6fd07 | 124 | einfo ("%B%X: section %s has relocs; can not use --embedded-relocs\n", |
252b5132 RH |
125 | abfd, bfd_get_section_name (abfd, sec)); |
126 | } | |
127 | ||
128 | /* This function is called after the section sizes and offsets have | |
129 | been set. If we are generating embedded relocs, it calls a special | |
130 | BFD backend routine to do the work. */ | |
131 | ||
132 | static void | |
133 | gld${EMULATION_NAME}_after_allocation () | |
134 | { | |
135 | bfd *abfd; | |
136 | ||
137 | if (! command_line.embedded_relocs | |
138 | || link_info.relocateable) | |
139 | return; | |
140 | ||
141 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) | |
142 | { | |
143 | asection *datasec, *relsec; | |
144 | char *errmsg; | |
145 | ||
146 | datasec = bfd_get_section_by_name (abfd, ".sdata"); | |
147 | ||
148 | if (datasec == NULL || datasec->reloc_count == 0) | |
149 | continue; | |
150 | ||
151 | relsec = bfd_get_section_by_name (abfd, ".rel.sdata"); | |
152 | ASSERT (relsec != NULL); | |
153 | ||
154 | if (! bfd_mips_ecoff_create_embedded_relocs (abfd, &link_info, | |
155 | datasec, relsec, | |
156 | &errmsg)) | |
157 | { | |
158 | if (errmsg == NULL) | |
159 | einfo ("%B%X: can not create runtime reloc information: %E\n", | |
160 | abfd); | |
161 | else | |
162 | einfo ("%X%B: can not create runtime reloc information: %s\n", | |
163 | abfd, errmsg); | |
164 | } | |
165 | } | |
166 | } | |
167 | ||
168 | static char * | |
169 | gld${EMULATION_NAME}_get_script(isfile) | |
170 | int *isfile; | |
171 | EOF | |
172 | ||
173 | if test -n "$COMPILE_IN" | |
174 | then | |
175 | # Scripts compiled in. | |
176 | ||
177 | # sed commands to quote an ld script as a C string. | |
597e2591 | 178 | sc="-f stringify.sed" |
252b5132 RH |
179 | |
180 | cat >>e${EMULATION_NAME}.c <<EOF | |
181 | { | |
182 | *isfile = 0; | |
183 | ||
184 | if (link_info.relocateable == true && config.build_constructors == true) | |
185 | return | |
186 | EOF | |
187 | sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c | |
188 | echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c | |
189 | sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c | |
190 | echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c | |
191 | sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c | |
192 | echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c | |
193 | sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c | |
194 | echo ' ; else return' >> e${EMULATION_NAME}.c | |
195 | sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c | |
196 | echo '; }' >> e${EMULATION_NAME}.c | |
197 | ||
198 | else | |
199 | # Scripts read from the filesystem. | |
200 | ||
201 | cat >>e${EMULATION_NAME}.c <<EOF | |
202 | { | |
203 | *isfile = 1; | |
204 | ||
205 | if (link_info.relocateable == true && config.build_constructors == true) | |
206 | return "ldscripts/${EMULATION_NAME}.xu"; | |
207 | else if (link_info.relocateable == true) | |
208 | return "ldscripts/${EMULATION_NAME}.xr"; | |
209 | else if (!config.text_read_only) | |
210 | return "ldscripts/${EMULATION_NAME}.xbn"; | |
211 | else if (!config.magic_demand_paged) | |
212 | return "ldscripts/${EMULATION_NAME}.xn"; | |
213 | else | |
214 | return "ldscripts/${EMULATION_NAME}.x"; | |
215 | } | |
216 | EOF | |
217 | ||
218 | fi | |
219 | ||
220 | cat >>e${EMULATION_NAME}.c <<EOF | |
221 | ||
222 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = | |
223 | { | |
224 | gld${EMULATION_NAME}_before_parse, | |
225 | syslib_default, | |
226 | hll_default, | |
227 | after_parse_default, | |
228 | gld${EMULATION_NAME}_after_open, | |
229 | gld${EMULATION_NAME}_after_allocation, | |
230 | set_output_arch_default, | |
231 | ldemul_default_target, | |
232 | before_allocation_default, | |
233 | gld${EMULATION_NAME}_get_script, | |
234 | "${EMULATION_NAME}", | |
e1c47aa4 AM |
235 | "${OUTPUT_FORMAT}", |
236 | NULL, /* finish */ | |
237 | NULL, /* create output section statements */ | |
238 | NULL, /* open dynamic archive */ | |
239 | NULL, /* place orphan */ | |
240 | NULL, /* set symbols */ | |
241 | NULL, /* parse args */ | |
242 | NULL, /* unrecognized file */ | |
243 | NULL, /* list options */ | |
40d109bf AM |
244 | NULL, /* recognized file */ |
245 | NULL /* find_potential_libraries */ | |
252b5132 RH |
246 | }; |
247 | EOF |