| 1 | # This shell script emits a C file. -*- C -*- |
| 2 | # It does some substitutions. |
| 3 | cat >e${EMULATION_NAME}.c <<EOF |
| 4 | /* This file is is generated by a shell script. DO NOT EDIT! */ |
| 5 | |
| 6 | /* Handle embedded relocs for m68k. |
| 7 | Copyright 2000, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
| 8 | Written by Michael Sokolov <msokolov@ivan.Harhan.ORG>, based on generic.em |
| 9 | by Steve Chamberlain <steve@cygnus.com>, embedded relocs code based on |
| 10 | mipsecoff.em by Ian Lance Taylor <ian@cygnus.com>. |
| 11 | |
| 12 | This file is part of GLD, the Gnu Linker. |
| 13 | |
| 14 | This program is free software; you can redistribute it and/or modify |
| 15 | it under the terms of the GNU General Public License as published by |
| 16 | the Free Software Foundation; either version 2 of the License, or |
| 17 | (at your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, |
| 20 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | GNU General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; if not, write to the Free Software |
| 26 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 27 | |
| 28 | #define TARGET_IS_${EMULATION_NAME} |
| 29 | |
| 30 | #include "bfd.h" |
| 31 | #include "sysdep.h" |
| 32 | #include "bfdlink.h" |
| 33 | |
| 34 | #include "ld.h" |
| 35 | #include "ldmain.h" |
| 36 | #include "ldexp.h" |
| 37 | #include "ldlang.h" |
| 38 | #include "ldfile.h" |
| 39 | #include "ldemul.h" |
| 40 | #include "ldmisc.h" |
| 41 | |
| 42 | static void check_sections (bfd *, asection *, void *); |
| 43 | |
| 44 | static void |
| 45 | gld${EMULATION_NAME}_before_parse (void) |
| 46 | { |
| 47 | #ifndef TARGET_ /* I.e., if not generic. */ |
| 48 | ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); |
| 49 | #endif /* not TARGET_ */ |
| 50 | } |
| 51 | |
| 52 | /* This function is run after all the input files have been opened. |
| 53 | We create a .emreloc section for each input file with a non zero |
| 54 | .data section. The BFD backend will fill in these sections with |
| 55 | magic numbers which can be used to relocate the data section at run |
| 56 | time. */ |
| 57 | |
| 58 | static void |
| 59 | gld${EMULATION_NAME}_after_open (void) |
| 60 | { |
| 61 | bfd *abfd; |
| 62 | |
| 63 | if (! command_line.embedded_relocs |
| 64 | || link_info.relocatable) |
| 65 | return; |
| 66 | |
| 67 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) |
| 68 | { |
| 69 | asection *datasec; |
| 70 | |
| 71 | /* As first-order business, make sure that each input BFD is COFF. It |
| 72 | better be, as we are directly calling a COFF backend function. */ |
| 73 | if (bfd_get_flavour (abfd) != bfd_target_coff_flavour) |
| 74 | einfo ("%F%B: all input objects must be COFF for --embedded-relocs\n"); |
| 75 | |
| 76 | datasec = bfd_get_section_by_name (abfd, ".data"); |
| 77 | |
| 78 | /* Note that we assume that the reloc_count field has already |
| 79 | been set up. We could call bfd_get_reloc_upper_bound, but |
| 80 | that returns the size of a memory buffer rather than a reloc |
| 81 | count. We do not want to call bfd_canonicalize_reloc, |
| 82 | because although it would always work it would force us to |
| 83 | read in the relocs into BFD canonical form, which would waste |
| 84 | a significant amount of time and memory. */ |
| 85 | if (datasec != NULL && datasec->reloc_count > 0) |
| 86 | { |
| 87 | asection *relsec; |
| 88 | |
| 89 | relsec = bfd_make_section (abfd, ".emreloc"); |
| 90 | if (relsec == NULL |
| 91 | || ! bfd_set_section_flags (abfd, relsec, |
| 92 | (SEC_ALLOC |
| 93 | | SEC_LOAD |
| 94 | | SEC_HAS_CONTENTS |
| 95 | | SEC_IN_MEMORY)) |
| 96 | || ! bfd_set_section_alignment (abfd, relsec, 2) |
| 97 | || ! bfd_set_section_size (abfd, relsec, |
| 98 | datasec->reloc_count * 12)) |
| 99 | einfo ("%F%B: can not create .emreloc section: %E\n"); |
| 100 | } |
| 101 | |
| 102 | /* Double check that all other data sections are empty, as is |
| 103 | required for embedded PIC code. */ |
| 104 | bfd_map_over_sections (abfd, check_sections, datasec); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | /* Check that of the data sections, only the .data section has |
| 109 | relocs. This is called via bfd_map_over_sections. */ |
| 110 | |
| 111 | static void |
| 112 | check_sections (bfd *abfd, asection *sec, void *datasec) |
| 113 | { |
| 114 | if ((bfd_get_section_flags (abfd, sec) & SEC_DATA) |
| 115 | && sec != datasec |
| 116 | && sec->reloc_count != 0) |
| 117 | einfo ("%B%X: section %s has relocs; can not use --embedded-relocs\n", |
| 118 | abfd, bfd_get_section_name (abfd, sec)); |
| 119 | } |
| 120 | |
| 121 | /* This function is called after the section sizes and offsets have |
| 122 | been set. If we are generating embedded relocs, it calls a special |
| 123 | BFD backend routine to do the work. */ |
| 124 | |
| 125 | static void |
| 126 | gld${EMULATION_NAME}_after_allocation (void) |
| 127 | { |
| 128 | bfd *abfd; |
| 129 | |
| 130 | if (! command_line.embedded_relocs |
| 131 | || link_info.relocatable) |
| 132 | return; |
| 133 | |
| 134 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) |
| 135 | { |
| 136 | asection *datasec, *relsec; |
| 137 | char *errmsg; |
| 138 | |
| 139 | datasec = bfd_get_section_by_name (abfd, ".data"); |
| 140 | |
| 141 | if (datasec == NULL || datasec->reloc_count == 0) |
| 142 | continue; |
| 143 | |
| 144 | relsec = bfd_get_section_by_name (abfd, ".emreloc"); |
| 145 | ASSERT (relsec != NULL); |
| 146 | |
| 147 | if (! bfd_m68k_coff_create_embedded_relocs (abfd, &link_info, |
| 148 | datasec, relsec, |
| 149 | &errmsg)) |
| 150 | { |
| 151 | if (errmsg == NULL) |
| 152 | einfo ("%B%X: can not create runtime reloc information: %E\n", |
| 153 | abfd); |
| 154 | else |
| 155 | einfo ("%X%B: can not create runtime reloc information: %s\n", |
| 156 | abfd, errmsg); |
| 157 | } |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | static char * |
| 162 | gld${EMULATION_NAME}_get_script (int *isfile) |
| 163 | EOF |
| 164 | |
| 165 | if test -n "$COMPILE_IN" |
| 166 | then |
| 167 | # Scripts compiled in. |
| 168 | |
| 169 | # sed commands to quote an ld script as a C string. |
| 170 | sc="-f stringify.sed" |
| 171 | |
| 172 | cat >>e${EMULATION_NAME}.c <<EOF |
| 173 | { |
| 174 | *isfile = 0; |
| 175 | |
| 176 | if (link_info.relocatable && config.build_constructors) |
| 177 | return |
| 178 | EOF |
| 179 | sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c |
| 180 | echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c |
| 181 | sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c |
| 182 | echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c |
| 183 | sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c |
| 184 | echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c |
| 185 | sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c |
| 186 | echo ' ; else return' >> e${EMULATION_NAME}.c |
| 187 | sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c |
| 188 | echo '; }' >> e${EMULATION_NAME}.c |
| 189 | |
| 190 | else |
| 191 | # Scripts read from the filesystem. |
| 192 | |
| 193 | cat >>e${EMULATION_NAME}.c <<EOF |
| 194 | { |
| 195 | *isfile = 1; |
| 196 | |
| 197 | if (link_info.relocatable && config.build_constructors) |
| 198 | return "ldscripts/${EMULATION_NAME}.xu"; |
| 199 | else if (link_info.relocatable) |
| 200 | return "ldscripts/${EMULATION_NAME}.xr"; |
| 201 | else if (!config.text_read_only) |
| 202 | return "ldscripts/${EMULATION_NAME}.xbn"; |
| 203 | else if (!config.magic_demand_paged) |
| 204 | return "ldscripts/${EMULATION_NAME}.xn"; |
| 205 | else |
| 206 | return "ldscripts/${EMULATION_NAME}.x"; |
| 207 | } |
| 208 | EOF |
| 209 | |
| 210 | fi |
| 211 | |
| 212 | cat >>e${EMULATION_NAME}.c <<EOF |
| 213 | |
| 214 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = |
| 215 | { |
| 216 | gld${EMULATION_NAME}_before_parse, |
| 217 | syslib_default, |
| 218 | hll_default, |
| 219 | after_parse_default, |
| 220 | gld${EMULATION_NAME}_after_open, |
| 221 | gld${EMULATION_NAME}_after_allocation, |
| 222 | set_output_arch_default, |
| 223 | ldemul_default_target, |
| 224 | before_allocation_default, |
| 225 | gld${EMULATION_NAME}_get_script, |
| 226 | "${EMULATION_NAME}", |
| 227 | "${OUTPUT_FORMAT}", |
| 228 | finish_default, |
| 229 | NULL, /* create output section statements */ |
| 230 | NULL, /* open dynamic archive */ |
| 231 | NULL, /* place orphan */ |
| 232 | NULL, /* set symbols */ |
| 233 | NULL, /* parse args */ |
| 234 | NULL, /* add_options */ |
| 235 | NULL, /* handle_option */ |
| 236 | NULL, /* unrecognized file */ |
| 237 | NULL, /* list options */ |
| 238 | NULL, /* recognized file */ |
| 239 | NULL, /* find_potential_libraries */ |
| 240 | NULL /* new_vers_pattern */ |
| 241 | }; |
| 242 | EOF |