| 1 | # Copyright (C) 2014-2019 Free Software Foundation, Inc. |
| 2 | # |
| 3 | # Copying and distribution of this file, with or without modification, |
| 4 | # are permitted in any medium without royalty provided the copyright |
| 5 | # notice and this notice are preserved. |
| 6 | # |
| 7 | # Unusual variables checked by this code: |
| 8 | # NOP - four byte opcode for no-op (defaults to 0) |
| 9 | # NO_SMALL_DATA - no .sbss/.sbss2/.sdata/.sdata2 sections if not |
| 10 | # empty. |
| 11 | # DATA_ADDR - if end-of-text-plus-one-page isn't right for data start |
| 12 | # INITIAL_READONLY_SECTIONS - at start of text segment |
| 13 | # OTHER_READONLY_SECTIONS - other than .text .init .rodata ... |
| 14 | # (e.g., .PARISC.milli) |
| 15 | # OTHER_TEXT_SECTIONS - these get put in .text when relocating |
| 16 | # OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ... |
| 17 | # (e.g., .PARISC.global) |
| 18 | # ATTRS_SECTIONS - at the end |
| 19 | # OTHER_SECTIONS - at the end |
| 20 | # EXECUTABLE_SYMBOLS - symbols that must be defined for an |
| 21 | # executable (e.g., _DYNAMIC_LINK) |
| 22 | # TEXT_START_SYMBOLS - symbols that appear at the start of the |
| 23 | # .text section. |
| 24 | # DATA_START_SYMBOLS - symbols that appear at the start of the |
| 25 | # .data section. |
| 26 | # OTHER_GOT_SYMBOLS - symbols defined just before .got. |
| 27 | # OTHER_GOT_SECTIONS - sections just after .got. |
| 28 | # OTHER_SDATA_SECTIONS - sections just after .sdata. |
| 29 | # OTHER_BSS_SYMBOLS - symbols that appear at the start of the |
| 30 | # .bss section besides __bss_start. |
| 31 | # DATA_PLT - .plt should be in data segment, not text segment. |
| 32 | # BSS_PLT - .plt should be in bss segment |
| 33 | # TEXT_DYNAMIC - .dynamic in text segment, not data segment. |
| 34 | # EMBEDDED - whether this is for an embedded system. |
| 35 | # SHLIB_TEXT_START_ADDR - if set, add to SIZEOF_HEADERS to set |
| 36 | # start address of shared library. |
| 37 | # INPUT_FILES - INPUT command of files to always include |
| 38 | # WRITABLE_RODATA - if set, the .rodata section should be writable |
| 39 | # INIT_START, INIT_END - statements just before and just after |
| 40 | # combination of .init sections. |
| 41 | # FINI_START, FINI_END - statements just before and just after |
| 42 | # combination of .fini sections. |
| 43 | # STACK_ADDR - start of a .stack section. |
| 44 | # OTHER_SYMBOLS - symbols to place right at the end of the script. |
| 45 | # |
| 46 | # When adding sections, do note that the names of some sections are used |
| 47 | # when specifying the start address of the next. |
| 48 | # |
| 49 | |
| 50 | # Many sections come in three flavours. There is the 'real' section, |
| 51 | # like ".data". Then there are the per-procedure or per-variable |
| 52 | # sections, generated by -ffunction-sections and -fdata-sections in GCC, |
| 53 | # and useful for --gc-sections, which for a variable "foo" might be |
| 54 | # ".data.foo". Then there are the linkonce sections, for which the linker |
| 55 | # eliminates duplicates, which are named like ".gnu.linkonce.d.foo". |
| 56 | # The exact correspondences are: |
| 57 | # |
| 58 | # Section Linkonce section |
| 59 | # .text .gnu.linkonce.t.foo |
| 60 | # .rodata .gnu.linkonce.r.foo |
| 61 | # .data .gnu.linkonce.d.foo |
| 62 | # .bss .gnu.linkonce.b.foo |
| 63 | # .sdata .gnu.linkonce.s.foo |
| 64 | # .sbss .gnu.linkonce.sb.foo |
| 65 | # .sdata2 .gnu.linkonce.s2.foo |
| 66 | # .sbss2 .gnu.linkonce.sb2.foo |
| 67 | # .debug_info .gnu.linkonce.wi.foo |
| 68 | # |
| 69 | # Each of these can also have corresponding .rel.* and .rela.* sections. |
| 70 | |
| 71 | test -z "$ENTRY" && ENTRY=_start |
| 72 | test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT} |
| 73 | test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT} |
| 74 | if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi |
| 75 | test -z "${ELFSIZE}" && ELFSIZE=32 |
| 76 | test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8" |
| 77 | test -z "$ATTRS_SECTIONS" && ATTRS_SECTIONS=".gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }" |
| 78 | test "$LD_FLAG" = "N" && DATA_ADDR=. |
| 79 | INTERP=".interp ${RELOCATING-0} : { *(.interp) }" |
| 80 | PLT=".plt ${RELOCATING-0} : { *(.plt) }" |
| 81 | DYNAMIC=".dynamic ${RELOCATING-0} : { *(.dynamic) }" |
| 82 | RODATA=".rodata ${RELOCATING-0} : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }" |
| 83 | if test -z "${NO_SMALL_DATA}"; then |
| 84 | SBSS=".sbss ${RELOCATING-0} : |
| 85 | { |
| 86 | ${RELOCATING+PROVIDE (__sbss_start = .);} |
| 87 | ${RELOCATING+PROVIDE (___sbss_start = .);} |
| 88 | *(.dynsbss) |
| 89 | *(.sbss${RELOCATING+ .sbss.* .gnu.linkonce.sb.*}) |
| 90 | *(.scommon) |
| 91 | ${RELOCATING+PROVIDE (__sbss_end = .);} |
| 92 | ${RELOCATING+PROVIDE (___sbss_end = .);} |
| 93 | }" |
| 94 | SBSS2=".sbss2 ${RELOCATING-0} : { *(.sbss2${RELOCATING+ .sbss2.* .gnu.linkonce.sb2.*}) }" |
| 95 | SDATA="/* We want the small data sections together, so single-instruction offsets |
| 96 | can access them all, and initialized data all before uninitialized, so |
| 97 | we can shorten the on-disk segment size. */ |
| 98 | .sdata ${RELOCATING-0} : |
| 99 | { |
| 100 | ${RELOCATING+${SDATA_START_SYMBOLS}} |
| 101 | *(.sdata${RELOCATING+ .sdata.* .gnu.linkonce.s.*}) |
| 102 | }" |
| 103 | SDATA2=".sdata2 ${RELOCATING-0} : { *(.sdata2${RELOCATING+ .sdata2.* .gnu.linkonce.s2.*}) }" |
| 104 | REL_SDATA=".rel.sdata ${RELOCATING-0} : { *(.rel.sdata${RELOCATING+ .rel.sdata.* .rel.gnu.linkonce.s.*}) } |
| 105 | .rela.sdata ${RELOCATING-0} : { *(.rela.sdata${RELOCATING+ .rela.sdata.* .rela.gnu.linkonce.s.*}) }" |
| 106 | REL_SBSS=".rel.sbss ${RELOCATING-0} : { *(.rel.sbss${RELOCATING+ .rel.sbss.* .rel.gnu.linkonce.sb.*}) } |
| 107 | .rela.sbss ${RELOCATING-0} : { *(.rela.sbss${RELOCATING+ .rela.sbss.* .rela.gnu.linkonce.sb.*}) }" |
| 108 | REL_SDATA2=".rel.sdata2 ${RELOCATING-0} : { *(.rel.sdata2${RELOCATING+ .rel.sdata2.* .rel.gnu.linkonce.s2.*}) } |
| 109 | .rela.sdata2 ${RELOCATING-0} : { *(.rela.sdata2${RELOCATING+ .rela.sdata2.* .rela.gnu.linkonce.s2.*}) }" |
| 110 | REL_SBSS2=".rel.sbss2 ${RELOCATING-0} : { *(.rel.sbss2${RELOCATING+ .rel.sbss2.* .rel.gnu.linkonce.sb2.*}) } |
| 111 | .rela.sbss2 ${RELOCATING-0} : { *(.rela.sbss2${RELOCATING+ .rela.sbss2.* .rela.gnu.linkonce.sb2.*}) }" |
| 112 | fi |
| 113 | CTOR=" |
| 114 | ${CONSTRUCTING+${CTOR_START}} |
| 115 | /* gcc uses crtbegin.o to find the start of |
| 116 | the constructors, so we make sure it is |
| 117 | first. Because this is a wildcard, it |
| 118 | doesn't matter if the user does not |
| 119 | actually link against crtbegin.o; the |
| 120 | linker won't look for a file to match a |
| 121 | wildcard. The wildcard also means that it |
| 122 | doesn't matter which directory crtbegin.o |
| 123 | is in. */ |
| 124 | |
| 125 | KEEP (*crtbegin.o(.ctors)) |
| 126 | KEEP (*crtbegin?.o(.ctors)) |
| 127 | |
| 128 | /* We don't want to include the .ctor section from |
| 129 | the crtend.o file until after the sorted ctors. |
| 130 | The .ctor section from the crtend file contains the |
| 131 | end of ctors marker and it must be last */ |
| 132 | |
| 133 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors)) |
| 134 | KEEP (*(SORT(.ctors.*))) |
| 135 | KEEP (*(.ctors)) |
| 136 | ${CONSTRUCTING+${CTOR_END}} |
| 137 | " |
| 138 | DTOR=" |
| 139 | ${CONSTRUCTING+${DTOR_START}} |
| 140 | KEEP (*crtbegin.o(.dtors)) |
| 141 | KEEP (*crtbegin?.o(.dtors)) |
| 142 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors)) |
| 143 | KEEP (*(SORT(.dtors.*))) |
| 144 | KEEP (*(.dtors)) |
| 145 | ${CONSTRUCTING+${DTOR_END}} |
| 146 | " |
| 147 | STACK=" .stack ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} : |
| 148 | { |
| 149 | ${RELOCATING+_stack = .;} |
| 150 | *(.stack) |
| 151 | }" |
| 152 | |
| 153 | test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}" |
| 154 | |
| 155 | cat <<EOF |
| 156 | /* Copyright (C) 2014-2019 Free Software Foundation, Inc. |
| 157 | |
| 158 | Copying and distribution of this script, with or without modification, |
| 159 | are permitted in any medium without royalty provided the copyright |
| 160 | notice and this notice are preserved. */ |
| 161 | |
| 162 | OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}", |
| 163 | "${LITTLE_OUTPUT_FORMAT}") |
| 164 | OUTPUT_ARCH(${OUTPUT_ARCH}) |
| 165 | ${RELOCATING+ENTRY(${ENTRY})} |
| 166 | |
| 167 | ${RELOCATING+${LIB_SEARCH_DIRS}} |
| 168 | ${RELOCATING+/* Do we need any of these for elf? |
| 169 | __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}} */} |
| 170 | ${RELOCATING+${EXECUTABLE_SYMBOLS}} |
| 171 | ${RELOCATING+${INPUT_FILES}} |
| 172 | ${RELOCATING- /* For some reason, the Solaris linker makes bad executables |
| 173 | if gld -r is used and the intermediate file has sections starting |
| 174 | at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld |
| 175 | bug. But for now assigning the zero vmas works. */} |
| 176 | |
| 177 | SECTIONS |
| 178 | { |
| 179 | /* Read-only sections, merged into text segment: */ |
| 180 | ${CREATE_SHLIB-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}} |
| 181 | ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}} |
| 182 | ${CREATE_SHLIB-${INTERP}} |
| 183 | ${INITIAL_READONLY_SECTIONS} |
| 184 | ${TEXT_DYNAMIC+${DYNAMIC}} |
| 185 | .hash ${RELOCATING-0} : { *(.hash) } |
| 186 | .dynsym ${RELOCATING-0} : { *(.dynsym) } |
| 187 | .dynstr ${RELOCATING-0} : { *(.dynstr) } |
| 188 | .gnu.version ${RELOCATING-0} : { *(.gnu.version) } |
| 189 | .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) } |
| 190 | .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) } |
| 191 | |
| 192 | EOF |
| 193 | if [ "x$COMBRELOC" = x ]; then |
| 194 | COMBRELOCCAT=cat |
| 195 | else |
| 196 | COMBRELOCCAT="cat > $COMBRELOC" |
| 197 | fi |
| 198 | eval $COMBRELOCCAT <<EOF |
| 199 | .rel.init ${RELOCATING-0} : { *(.rel.init) } |
| 200 | .rela.init ${RELOCATING-0} : { *(.rela.init) } |
| 201 | .rel.text ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) } |
| 202 | .rela.text ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) } |
| 203 | .rel.fini ${RELOCATING-0} : { *(.rel.fini) } |
| 204 | .rela.fini ${RELOCATING-0} : { *(.rela.fini) } |
| 205 | .rel.rodata ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) } |
| 206 | .rela.rodata ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) } |
| 207 | ${OTHER_READONLY_RELOC_SECTIONS} |
| 208 | .rel.data ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) } |
| 209 | .rela.data ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) } |
| 210 | .rel.ctors ${RELOCATING-0} : { *(.rel.ctors) } |
| 211 | .rela.ctors ${RELOCATING-0} : { *(.rela.ctors) } |
| 212 | .rel.dtors ${RELOCATING-0} : { *(.rel.dtors) } |
| 213 | .rela.dtors ${RELOCATING-0} : { *(.rela.dtors) } |
| 214 | .rel.got ${RELOCATING-0} : { *(.rel.got) } |
| 215 | .rela.got ${RELOCATING-0} : { *(.rela.got) } |
| 216 | ${OTHER_GOT_RELOC_SECTIONS} |
| 217 | ${REL_SDATA} |
| 218 | ${REL_SBSS} |
| 219 | ${REL_SDATA2} |
| 220 | ${REL_SBSS2} |
| 221 | .rel.bss ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) } |
| 222 | .rela.bss ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) } |
| 223 | EOF |
| 224 | if [ -n "$COMBRELOC" ]; then |
| 225 | cat <<EOF |
| 226 | .rel.dyn ${RELOCATING-0} : |
| 227 | { |
| 228 | EOF |
| 229 | sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/ \1/' $COMBRELOC |
| 230 | cat <<EOF |
| 231 | } |
| 232 | .rela.dyn ${RELOCATING-0} : |
| 233 | { |
| 234 | EOF |
| 235 | sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/ \1/' $COMBRELOC |
| 236 | cat <<EOF |
| 237 | } |
| 238 | EOF |
| 239 | fi |
| 240 | cat <<EOF |
| 241 | ${RELOCATING+. = ALIGN(0x1000);} |
| 242 | .rel.plt ${RELOCATING-0} : { *(.rel.plt) } |
| 243 | .rela.plt ${RELOCATING-0} : { *(.rela.plt) } |
| 244 | ${OTHER_PLT_RELOC_SECTIONS} |
| 245 | ${DATA_PLT-${BSS_PLT-${PLT}}} |
| 246 | .text ${RELOCATING-0} : |
| 247 | { |
| 248 | ${RELOCATING+${TEXT_START_SYMBOLS}} |
| 249 | *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*}) |
| 250 | /* .gnu.warning sections are handled specially by elf.em. */ |
| 251 | *(.gnu.warning) |
| 252 | ${RELOCATING+${OTHER_TEXT_SECTIONS}} |
| 253 | } =${NOP-0} |
| 254 | .init ${RELOCATING-0} : |
| 255 | { |
| 256 | ${RELOCATING+${INIT_START}} |
| 257 | KEEP (*(SORT_NONE(.init))) |
| 258 | ${RELOCATING+${INIT_END}} |
| 259 | } =${NOP-0} |
| 260 | .fini ${RELOCATING-0} : |
| 261 | { |
| 262 | ${RELOCATING+${FINI_START}} |
| 263 | KEEP (*(SORT_NONE(.fini))) |
| 264 | ${RELOCATING+${FINI_END}} |
| 265 | } =${NOP-0} |
| 266 | ${RELOCATING+PROVIDE (__etext = .);} |
| 267 | ${RELOCATING+PROVIDE (_etext = .);} |
| 268 | ${RELOCATING+PROVIDE (etext = .);} |
| 269 | ${RELOCATING+. = ALIGN(0x1000);} |
| 270 | ${CREATE_SHLIB-${SDATA2}} |
| 271 | ${CREATE_SHLIB-${SBSS2}} |
| 272 | ${OTHER_READONLY_SECTIONS} |
| 273 | .eh_frame_hdr ${RELOCATING-0} : { *(.eh_frame_hdr) } |
| 274 | |
| 275 | ${RELOCATING+. = ALIGN(0x1000);} |
| 276 | .data ${RELOCATING-0} : |
| 277 | { |
| 278 | ${RELOCATING+*(.rodata .rodata.*) |
| 279 | *(.rodata1) |
| 280 | *(.gnu.linkonce.r.*) |
| 281 | ${DATA_START_SYMBOLS}} |
| 282 | *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*}) |
| 283 | ${CONSTRUCTING+SORT(CONSTRUCTORS)} |
| 284 | ${RELOCATING+KEEP (*(.eh_frame)) |
| 285 | *(.gcc_except_table) |
| 286 | ${CTOR} |
| 287 | ${DTOR} |
| 288 | KEEP (*(.jcr))} |
| 289 | } |
| 290 | .data1 ${RELOCATING-0} : { *(.data1) } |
| 291 | ${RELOCATING+. = ALIGN(0x1000);} |
| 292 | .gcc_except_table ${RELOCATING-0} : { *(.gcc_except_table) } |
| 293 | ${WRITABLE_RODATA+${RODATA}} |
| 294 | ${OTHER_READWRITE_SECTIONS} |
| 295 | ${TEXT_DYNAMIC-${DYNAMIC}} |
| 296 | ${DATA_PLT+${PLT}} |
| 297 | ${RELOCATING+${OTHER_GOT_SYMBOLS}} |
| 298 | .got ${RELOCATING-0} : {${RELOCATING+ *(.got.plt)} *(.got) } |
| 299 | ${OTHER_GOT_SECTIONS} |
| 300 | ${CREATE_SHLIB+${SDATA2}} |
| 301 | ${CREATE_SHLIB+${SBSS2}} |
| 302 | ${SDATA} |
| 303 | ${OTHER_SDATA_SECTIONS} |
| 304 | ${RELOCATING+_edata = .;} |
| 305 | ${RELOCATING+PROVIDE (edata = .);} |
| 306 | ${RELOCATING+__bss_start = .;} |
| 307 | ${RELOCATING+${OTHER_BSS_SYMBOLS}} |
| 308 | ${SBSS} |
| 309 | ${BSS_PLT+${PLT}} |
| 310 | ${RELOCATING+. = ALIGN(0x1000);} |
| 311 | .bss ${RELOCATING-0} : |
| 312 | { |
| 313 | ${RELOCATING+*(.dynbss)} |
| 314 | *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*}) |
| 315 | ${RELOCATING+*(COMMON) |
| 316 | /* Align here to ensure that the .bss section occupies space up to |
| 317 | _end. Align after .bss to ensure correct alignment even if the |
| 318 | .bss section disappears because there are no input sections. */ |
| 319 | . = ALIGN(${ALIGNMENT});} |
| 320 | } |
| 321 | ${RELOCATING+${OTHER_BSS_END_SYMBOLS}} |
| 322 | ${RELOCATING+. = ALIGN(${ALIGNMENT});} |
| 323 | ${RELOCATING+${OTHER_END_SYMBOLS}} |
| 324 | ${RELOCATING+_end = .;} |
| 325 | ${RELOCATING+PROVIDE (end = .);} |
| 326 | ${STACK_ADDR+${STACK}} |
| 327 | |
| 328 | /* Stabs debugging sections. */ |
| 329 | .stab 0 : { *(.stab) } |
| 330 | .stabstr 0 : { *(.stabstr) } |
| 331 | .stab.excl 0 : { *(.stab.excl) } |
| 332 | .stab.exclstr 0 : { *(.stab.exclstr) } |
| 333 | .stab.index 0 : { *(.stab.index) } |
| 334 | .stab.indexstr 0 : { *(.stab.indexstr) } |
| 335 | |
| 336 | .comment 0 : { *(.comment) } |
| 337 | |
| 338 | EOF |
| 339 | |
| 340 | . $srcdir/scripttempl/DWARF.sc |
| 341 | |
| 342 | cat <<EOF |
| 343 | ${ATTRS_SECTIONS} |
| 344 | ${OTHER_SECTIONS} |
| 345 | ${RELOCATING+${OTHER_SYMBOLS}} |
| 346 | } |
| 347 | EOF |