ld/scripttempl/elf.sc

   1 # Copyright (C) 2014-2015 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 none)
   9 #       NO_SMALL_DATA - no .sbss/.sbss2/.sdata/.sdata2 sections if not
  10 #               empty.
  11 #       SMALL_DATA_CTOR - .ctors contains small data.
  12 #       SMALL_DATA_DTOR - .dtors contains small data.
  13 #       DATA_ADDR - if end-of-text-plus-one-page isn't right for data start
  14 #       INITIAL_READONLY_SECTIONS - at start of text segment
  15 #       OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
  16 #               (e.g., .PARISC.milli)
  17 #       OTHER_TEXT_SECTIONS - these get put in .text when relocating
  18 #       INITIAL_READWRITE_SECTIONS - at start of data segment (after relro)
  19 #       OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
  20 #               (e.g., .PARISC.global)
  21 #       OTHER_RELRO_SECTIONS - other than .data.rel.ro ...
  22 #               (e.g. PPC32 .fixup, .got[12])
  23 #       OTHER_BSS_SECTIONS - other than .bss .sbss ...
  24 #       ATTRS_SECTIONS - at the end
  25 #       OTHER_SECTIONS - at the end
  26 #       EXECUTABLE_SYMBOLS - symbols that must be defined for an
  27 #               executable (e.g., _DYNAMIC_LINK)
  28 #       TEXT_START_ADDR - the first byte of the text segment, after any
  29 #               headers.
  30 #       TEXT_BASE_ADDRESS - the first byte of the text segment.
  31 #       TEXT_START_SYMBOLS - symbols that appear at the start of the
  32 #               .text section.
  33 #       DATA_START_SYMBOLS - symbols that appear at the start of the
  34 #               .data section.
  35 #       DATA_END_SYMBOLS - symbols that appear at the end of the
  36 #               writeable data sections.
  37 #       OTHER_GOT_SYMBOLS - symbols defined just before .got.
  38 #       OTHER_GOT_SECTIONS - sections just after .got.
  39 #       OTHER_SDATA_SECTIONS - sections just after .sdata.
  40 #       OTHER_BSS_SYMBOLS - symbols that appear at the start of the
  41 #               .bss section besides __bss_start.
  42 #       PLT_NEXT_DATA - .plt next to data segment when .plt is in text segment.
  43 #       DATA_PLT - .plt should be in data segment, not text segment.
  44 #       PLT_BEFORE_GOT - .plt just before .got when .plt is in data segement.
  45 #       BSS_PLT - .plt should be in bss segment
  46 #       NO_REL_RELOCS - Don't include .rel.* sections in script
  47 #       NO_RELA_RELOCS - Don't include .rela.* sections in script
  48 #       NON_ALLOC_DYN - Place dynamic sections after data segment.
  49 #       TEXT_DYNAMIC - .dynamic in text segment, not data segment.
  50 #       EMBEDDED - whether this is for an embedded system.
  51 #       SHLIB_TEXT_START_ADDR - if set, add to SIZEOF_HEADERS to set
  52 #               start address of shared library.
  53 #       INPUT_FILES - INPUT command of files to always include
  54 #       WRITABLE_RODATA - if set, the .rodata section should be writable
  55 #       INIT_START, INIT_END -  statements just before and just after
  56 #       combination of .init sections.
  57 #       FINI_START, FINI_END - statements just before and just after
  58 #       combination of .fini sections.
  59 #       STACK_ADDR - start of a .stack section.
  60 #       OTHER_SYMBOLS - symbols to place right at the end of the script.
  61 #       ETEXT_NAME - name of a symbol for the end of the text section,
  62 #               normally etext.
  63 #       SEPARATE_CODE - if set, .text and similar sections containing
  64 #               actual machine instructions must be in wholly disjoint
  65 #               pages from any other data, including headers
  66 #       SEPARATE_GOTPLT - if set, .got.plt should be separate output section,
  67 #               so that .got can be in the RELRO area.  It should be set to
  68 #               the number of bytes in the beginning of .got.plt which can be
  69 #               in the RELRO area as well.
  70 #       USER_LABEL_PREFIX - prefix to add to user-visible symbols.
  71 #       RODATA_NAME, SDATA_NAME, SBSS_NAME, BSS_NAME - base parts of names
  72 #               for standard sections, without initial "." or suffixes.
  73 #
  74 # When adding sections, do note that the names of some sections are used
  75 # when specifying the start address of the next.
  76 #
  77
  78 #  Many sections come in three flavours.  There is the 'real' section,
  79 #  like ".data".  Then there are the per-procedure or per-variable
  80 #  sections, generated by -ffunction-sections and -fdata-sections in GCC,
  81 #  and useful for --gc-sections, which for a variable "foo" might be
  82 #  ".data.foo".  Then there are the linkonce sections, for which the linker
  83 #  eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
  84 #  The exact correspondences are:
  85 #
  86 #  Section      Linkonce section
  87 #  .text        .gnu.linkonce.t.foo
  88 #  .rodata      .gnu.linkonce.r.foo
  89 #  .data        .gnu.linkonce.d.foo
  90 #  .bss         .gnu.linkonce.b.foo
  91 #  .sdata       .gnu.linkonce.s.foo
  92 #  .sbss        .gnu.linkonce.sb.foo
  93 #  .sdata2      .gnu.linkonce.s2.foo
  94 #  .sbss2       .gnu.linkonce.sb2.foo
  95 #  .debug_info  .gnu.linkonce.wi.foo
  96 #  .tdata       .gnu.linkonce.td.foo
  97 #  .tbss        .gnu.linkonce.tb.foo
  98 #  .lrodata     .gnu.linkonce.lr.foo
  99 #  .ldata       .gnu.linkonce.l.foo
 100 #  .lbss        .gnu.linkonce.lb.foo
 101 #
 102 #  Each of these can also have corresponding .rel.* and .rela.* sections.
 103
 104 if test -n "$NOP"; then
 105   FILL="=$NOP"
 106 else
 107   FILL=
 108 fi
 109
 110 test -z "$RODATA_NAME" && RODATA_NAME=rodata
 111 test -z "$SDATA_NAME" && SDATA_NAME=sdata
 112 test -z "$SBSS_NAME" && SBSS_NAME=sbss
 113 test -z "$BSS_NAME" && BSS_NAME=bss
 114 test -z "$ENTRY" && ENTRY=${USER_LABEL_PREFIX}_start
 115 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
 116 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
 117 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
 118 test -z "${ELFSIZE}" && ELFSIZE=32
 119 test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
 120 test "$LD_FLAG" = "N" && DATA_ADDR=.
 121 test -z "${ETEXT_NAME}" && ETEXT_NAME=${USER_LABEL_PREFIX}etext
 122 test -n "$CREATE_SHLIB$CREATE_PIE" && test -n "$SHLIB_DATA_ADDR" && COMMONPAGESIZE=""
 123 test -z "$CREATE_SHLIB$CREATE_PIE" && test -n "$DATA_ADDR" && COMMONPAGESIZE=""
 124 test -n "$RELRO_NOW" && unset SEPARATE_GOTPLT
 125 test -z "$ATTRS_SECTIONS" && ATTRS_SECTIONS=".gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }"
 126 DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
 127 DATA_SEGMENT_RELRO_END=""
 128 DATA_SEGMENT_END=""
 129 if test -n "${COMMONPAGESIZE}"; then
 130   DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
 131   DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
 132   DATA_SEGMENT_RELRO_END=". = DATA_SEGMENT_RELRO_END (${SEPARATE_GOTPLT-0}, .);"
 133 fi
 134 if test -z "${INITIAL_READONLY_SECTIONS}${CREATE_SHLIB}"; then
 135   INITIAL_READONLY_SECTIONS=".interp       ${RELOCATING-0} : { *(.interp) }"
 136 fi
 137 if test -z "$PLT"; then
 138   IPLT=".iplt         ${RELOCATING-0} : { *(.iplt) }"
 139   PLT=".plt          ${RELOCATING-0} : { *(.plt)${IREL_IN_PLT+ *(.iplt)} }
 140   ${IREL_IN_PLT-$IPLT}"
 141 fi
 142 test -n "${DATA_PLT-${BSS_PLT-text}}" && TEXT_PLT=
 143 if test -z "$GOT"; then
 144   if test -z "$SEPARATE_GOTPLT"; then
 145     GOT=".got          ${RELOCATING-0} : { *(.got.plt) *(.igot.plt) *(.got) *(.igot) }"
 146   else
 147     GOT=".got          ${RELOCATING-0} : { *(.got) *(.igot) }"
 148     GOTPLT=".got.plt      ${RELOCATING-0} : { *(.got.plt)  *(.igot.plt) }"
 149   fi
 150 fi
 151 REL_IFUNC=".rel.ifunc    ${RELOCATING-0} : { *(.rel.ifunc) }"
 152 RELA_IFUNC=".rela.ifunc   ${RELOCATING-0} : { *(.rela.ifunc) }"
 153 REL_IPLT=".rel.iplt     ${RELOCATING-0} :
 154     {
 155       ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_start = .);}}
 156       *(.rel.iplt)
 157       ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_end = .);}}
 158     }"
 159 RELA_IPLT=".rela.iplt    ${RELOCATING-0} :
 160     {
 161       ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_start = .);}}
 162       *(.rela.iplt)
 163       ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_end = .);}}
 164     }"
 165 DYNAMIC=".dynamic      ${RELOCATING-0} : { *(.dynamic) }"
 166 RODATA=".${RODATA_NAME}       ${RELOCATING-0} : { *(.${RODATA_NAME}${RELOCATING+ .${RODATA_NAME}.* .gnu.linkonce.r.*}) }"
 167 DATARELRO=".data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro .data.rel.ro.* .gnu.linkonce.d.rel.ro.*) }"
 168 DISCARDED="/DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }"
 169 if test -z "${NO_SMALL_DATA}"; then
 170   SBSS=".${SBSS_NAME}         ${RELOCATING-0} :
 171   {
 172     ${RELOCATING+${SBSS_START_SYMBOLS}}
 173     ${CREATE_SHLIB+*(.${SBSS_NAME}2 .${SBSS_NAME}2.* .gnu.linkonce.sb2.*)}
 174     *(.dyn${SBSS_NAME})
 175     *(.${SBSS_NAME}${RELOCATING+ .${SBSS_NAME}.* .gnu.linkonce.sb.*})
 176     *(.scommon)
 177     ${RELOCATING+${SBSS_END_SYMBOLS}}
 178   }"
 179   SBSS2=".${SBSS_NAME}2        ${RELOCATING-0} : { *(.${SBSS_NAME}2${RELOCATING+ .${SBSS_NAME}2.* .gnu.linkonce.sb2.*}) }"
 180   SDATA="/* We want the small data sections together, so single-instruction offsets
 181      can access them all, and initialized data all before uninitialized, so
 182      we can shorten the on-disk segment size.  */
 183   .${SDATA_NAME}        ${RELOCATING-0} :
 184   {
 185     ${RELOCATING+${SDATA_START_SYMBOLS}}
 186     ${CREATE_SHLIB+*(.${SDATA_NAME}2 .${SDATA_NAME}2.* .gnu.linkonce.s2.*)}
 187     *(.${SDATA_NAME}${RELOCATING+ .${SDATA_NAME}.* .gnu.linkonce.s.*})
 188   }"
 189   SDATA2=".${SDATA_NAME}2       ${RELOCATING-0} :
 190   {
 191     ${RELOCATING+${SDATA2_START_SYMBOLS}}
 192     *(.${SDATA_NAME}2${RELOCATING+ .${SDATA_NAME}2.* .gnu.linkonce.s2.*})
 193   }"
 194   REL_SDATA=".rel.${SDATA_NAME}    ${RELOCATING-0} : { *(.rel.${SDATA_NAME}${RELOCATING+ .rel.${SDATA_NAME}.* .rel.gnu.linkonce.s.*}) }
 195   .rela.${SDATA_NAME}   ${RELOCATING-0} : { *(.rela.${SDATA_NAME}${RELOCATING+ .rela.${SDATA_NAME}.* .rela.gnu.linkonce.s.*}) }"
 196   REL_SBSS=".rel.${SBSS_NAME}     ${RELOCATING-0} : { *(.rel.${SBSS_NAME}${RELOCATING+ .rel.${SBSS_NAME}.* .rel.gnu.linkonce.sb.*}) }
 197   .rela.${SBSS_NAME}    ${RELOCATING-0} : { *(.rela.${SBSS_NAME}${RELOCATING+ .rela.${SBSS_NAME}.* .rela.gnu.linkonce.sb.*}) }"
 198   REL_SDATA2=".rel.${SDATA_NAME}2   ${RELOCATING-0} : { *(.rel.${SDATA_NAME}2${RELOCATING+ .rel.${SDATA_NAME}2.* .rel.gnu.linkonce.s2.*}) }
 199   .rela.${SDATA_NAME}2  ${RELOCATING-0} : { *(.rela.${SDATA_NAME}2${RELOCATING+ .rela.${SDATA_NAME}2.* .rela.gnu.linkonce.s2.*}) }"
 200   REL_SBSS2=".rel.${SBSS_NAME}2    ${RELOCATING-0} : { *(.rel.${SBSS_NAME}2${RELOCATING+ .rel.${SBSS_NAME}2.* .rel.gnu.linkonce.sb2.*}) }
 201   .rela.${SBSS_NAME}2   ${RELOCATING-0} : { *(.rela.${SBSS_NAME}2${RELOCATING+ .rela.${SBSS_NAME}2.* .rela.gnu.linkonce.sb2.*}) }"
 202 else
 203   NO_SMALL_DATA=" "
 204 fi
 205 if test -z "${DATA_GOT}"; then
 206   if test -n "${NO_SMALL_DATA}"; then
 207     DATA_GOT=" "
 208   fi
 209 fi
 210 if test -z "${SDATA_GOT}"; then
 211   if test -z "${NO_SMALL_DATA}"; then
 212     SDATA_GOT=" "
 213   fi
 214 fi
 215 test -n "$SEPARATE_GOTPLT" && SEPARATE_GOTPLT=" "
 216 test "${LARGE_SECTIONS}" = "yes" && REL_LARGE="
 217   .rel.ldata    ${RELOCATING-0} : { *(.rel.ldata${RELOCATING+ .rel.ldata.* .rel.gnu.linkonce.l.*}) }
 218   .rela.ldata   ${RELOCATING-0} : { *(.rela.ldata${RELOCATING+ .rela.ldata.* .rela.gnu.linkonce.l.*}) }
 219   .rel.lbss     ${RELOCATING-0} : { *(.rel.lbss${RELOCATING+ .rel.lbss.* .rel.gnu.linkonce.lb.*}) }
 220   .rela.lbss    ${RELOCATING-0} : { *(.rela.lbss${RELOCATING+ .rela.lbss.* .rela.gnu.linkonce.lb.*}) }
 221   .rel.lrodata  ${RELOCATING-0} : { *(.rel.lrodata${RELOCATING+ .rel.lrodata.* .rel.gnu.linkonce.lr.*}) }
 222   .rela.lrodata ${RELOCATING-0} : { *(.rela.lrodata${RELOCATING+ .rela.lrodata.* .rela.gnu.linkonce.lr.*}) }"
 223 test "${LARGE_SECTIONS}" = "yes" && LARGE_BSS="
 224   .lbss ${RELOCATING-0} :
 225   {
 226     *(.dynlbss)
 227     *(.lbss${RELOCATING+ .lbss.* .gnu.linkonce.lb.*})
 228     *(LARGE_COMMON)
 229   }"
 230 test "${LARGE_SECTIONS}" = "yes" && LARGE_SECTIONS="
 231   .lrodata ${RELOCATING-0} ${RELOCATING+ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))} :
 232   {
 233     *(.lrodata${RELOCATING+ .lrodata.* .gnu.linkonce.lr.*})
 234   }
 235   .ldata ${RELOCATING-0} ${RELOCATING+ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))} :
 236   {
 237     *(.ldata${RELOCATING+ .ldata.* .gnu.linkonce.l.*})
 238     ${RELOCATING+. = ALIGN(. != 0 ? ${ALIGNMENT} : 1);}
 239   }"
 240 if test "${ENABLE_INITFINI_ARRAY}" = "yes"; then
 241   SORT_INIT_ARRAY="KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))"
 242   SORT_FINI_ARRAY="KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))"
 243   CTORS_IN_INIT_ARRAY="EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors"
 244   DTORS_IN_FINI_ARRAY="EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors"
 245 else
 246   SORT_INIT_ARRAY="KEEP (*(SORT(.init_array.*)))"
 247   SORT_FINI_ARRAY="KEEP (*(SORT(.fini_array.*)))"
 248   CTORS_IN_INIT_ARRAY=
 249   DTORS_IN_FINI_ARRAY=
 250 fi
 251 INIT_ARRAY=".init_array   ${RELOCATING-0} :
 252   {
 253     ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__init_array_start = .);}}
 254     ${SORT_INIT_ARRAY}
 255     KEEP (*(.init_array ${CTORS_IN_INIT_ARRAY}))
 256     ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__init_array_end = .);}}
 257   }"
 258 FINI_ARRAY=".fini_array   ${RELOCATING-0} :
 259   {
 260     ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__fini_array_start = .);}}
 261     ${SORT_FINI_ARRAY}
 262     KEEP (*(.fini_array ${DTORS_IN_FINI_ARRAY}))
 263     ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__fini_array_end = .);}}
 264   }"
 265 CTOR=".ctors        ${CONSTRUCTING-0} :
 266   {
 267     ${CONSTRUCTING+${CTOR_START}}
 268     /* gcc uses crtbegin.o to find the start of
 269        the constructors, so we make sure it is
 270        first.  Because this is a wildcard, it
 271        doesn't matter if the user does not
 272        actually link against crtbegin.o; the
 273        linker won't look for a file to match a
 274        wildcard.  The wildcard also means that it
 275        doesn't matter which directory crtbegin.o
 276        is in.  */
 277
 278     KEEP (*crtbegin.o(.ctors))
 279     KEEP (*crtbegin?.o(.ctors))
 280
 281     /* We don't want to include the .ctor section from
 282        the crtend.o file until after the sorted ctors.
 283        The .ctor section from the crtend file contains the
 284        end of ctors marker and it must be last */
 285
 286     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))
 287     KEEP (*(SORT(.ctors.*)))
 288     KEEP (*(.ctors))
 289     ${CONSTRUCTING+${CTOR_END}}
 290   }"
 291 DTOR=".dtors        ${CONSTRUCTING-0} :
 292   {
 293     ${CONSTRUCTING+${DTOR_START}}
 294     KEEP (*crtbegin.o(.dtors))
 295     KEEP (*crtbegin?.o(.dtors))
 296     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
 297     KEEP (*(SORT(.dtors.*)))
 298     KEEP (*(.dtors))
 299     ${CONSTRUCTING+${DTOR_END}}
 300   }"
 301 STACK="  .stack        ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
 302   {
 303     ${RELOCATING+${USER_LABEL_PREFIX}_stack = .;}
 304     *(.stack)
 305   }"
 306
 307 TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${TEXT_START_ADDR})"
 308 SHLIB_TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${SHLIB_TEXT_START_ADDR:-0})"
 309
 310 if [ -z "$SEPARATE_CODE" ]; then
 311   SIZEOF_HEADERS_CODE=" + SIZEOF_HEADERS"
 312 else
 313   SIZEOF_HEADERS_CODE=
 314 fi
 315
 316 # If this is for an embedded system, don't add SIZEOF_HEADERS.
 317 if [ -z "$EMBEDDED" ]; then
 318    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}${SIZEOF_HEADERS_CODE}"
 319 else
 320    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
 321 fi
 322
 323 cat <<EOF
 324 /* Copyright (C) 2014-2015 Free Software Foundation, Inc.
 325
 326    Copying and distribution of this script, with or without modification,
 327    are permitted in any medium without royalty provided the copyright
 328    notice and this notice are preserved.  */
 329
 330 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
 331               "${LITTLE_OUTPUT_FORMAT}")
 332 OUTPUT_ARCH(${OUTPUT_ARCH})
 333 ${RELOCATING+ENTRY(${ENTRY})}
 334
 335 ${RELOCATING+${LIB_SEARCH_DIRS}}
 336 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
 337 ${RELOCATING+${INPUT_FILES}}
 338 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
 339   if gld -r is used and the intermediate file has sections starting
 340   at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
 341   bug.  But for now assigning the zero vmas works.  */}
 342
 343 SECTIONS
 344 {
 345   /* Read-only sections, merged into text segment: */
 346   ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+PROVIDE (__executable_start = ${TEXT_START_ADDR}); . = ${TEXT_BASE_ADDRESS};}}}
 347   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR}${SIZEOF_HEADERS_CODE};}}
 348   ${CREATE_PIE+${RELOCATING+PROVIDE (__executable_start = ${SHLIB_TEXT_START_ADDR}); . = ${SHLIB_TEXT_START_ADDR}${SIZEOF_HEADERS_CODE};}}
 349 EOF
 350
 351 emit_early_ro()
 352 {
 353   cat <<EOF
 354   ${INITIAL_READONLY_SECTIONS}
 355   .note.gnu.build-id : { *(.note.gnu.build-id) }
 356 EOF
 357 }
 358
 359 test -n "${SEPARATE_CODE}" || emit_early_ro
 360
 361 test -n "${RELOCATING+0}" || unset NON_ALLOC_DYN
 362 test -z "${NON_ALLOC_DYN}" || TEXT_DYNAMIC=
 363 cat > ldscripts/dyntmp.$$ <<EOF
 364   ${TEXT_DYNAMIC+${DYNAMIC}}
 365   .hash         ${RELOCATING-0} : { *(.hash) }
 366   .gnu.hash     ${RELOCATING-0} : { *(.gnu.hash) }
 367   .dynsym       ${RELOCATING-0} : { *(.dynsym) }
 368   .dynstr       ${RELOCATING-0} : { *(.dynstr) }
 369   .gnu.version  ${RELOCATING-0} : { *(.gnu.version) }
 370   .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
 371   .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
 372 EOF
 373
 374 if [ "x$COMBRELOC" = x ]; then
 375   COMBRELOCCAT="cat >> ldscripts/dyntmp.$$"
 376 else
 377   COMBRELOCCAT="cat > $COMBRELOC"
 378 fi
 379 eval $COMBRELOCCAT <<EOF
 380   ${INITIAL_RELOC_SECTIONS}
 381   .rel.init     ${RELOCATING-0} : { *(.rel.init) }
 382   .rela.init    ${RELOCATING-0} : { *(.rela.init) }
 383   .rel.text     ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
 384   .rela.text    ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
 385   .rel.fini     ${RELOCATING-0} : { *(.rel.fini) }
 386   .rela.fini    ${RELOCATING-0} : { *(.rela.fini) }
 387   .rel.${RODATA_NAME}   ${RELOCATING-0} : { *(.rel.${RODATA_NAME}${RELOCATING+ .rel.${RODATA_NAME}.* .rel.gnu.linkonce.r.*}) }
 388   .rela.${RODATA_NAME}  ${RELOCATING-0} : { *(.rela.${RODATA_NAME}${RELOCATING+ .rela.${RODATA_NAME}.* .rela.gnu.linkonce.r.*}) }
 389   ${OTHER_READONLY_RELOC_SECTIONS}
 390   .rel.data.rel.ro ${RELOCATING-0} : { *(.rel.data.rel.ro${RELOCATING+ .rel.data.rel.ro.* .rel.gnu.linkonce.d.rel.ro.*}) }
 391   .rela.data.rel.ro ${RELOCATING-0} : { *(.rela.data.rel.ro${RELOCATING+ .rela.data.rel.ro.* .rela.gnu.linkonce.d.rel.ro.*}) }
 392   .rel.data     ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
 393   .rela.data    ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
 394   ${OTHER_READWRITE_RELOC_SECTIONS}
 395   .rel.tdata    ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
 396   .rela.tdata   ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
 397   .rel.tbss     ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
 398   .rela.tbss    ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
 399   .rel.ctors    ${RELOCATING-0} : { *(.rel.ctors) }
 400   .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors) }
 401   .rel.dtors    ${RELOCATING-0} : { *(.rel.dtors) }
 402   .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors) }
 403   .rel.got      ${RELOCATING-0} : { *(.rel.got) }
 404   .rela.got     ${RELOCATING-0} : { *(.rela.got) }
 405   ${OTHER_GOT_RELOC_SECTIONS}
 406   ${REL_SDATA}
 407   ${REL_SBSS}
 408   ${REL_SDATA2}
 409   ${REL_SBSS2}
 410   .rel.${BSS_NAME}      ${RELOCATING-0} : { *(.rel.${BSS_NAME}${RELOCATING+ .rel.${BSS_NAME}.* .rel.gnu.linkonce.b.*}) }
 411   .rela.${BSS_NAME}     ${RELOCATING-0} : { *(.rela.${BSS_NAME}${RELOCATING+ .rela.${BSS_NAME}.* .rela.gnu.linkonce.b.*}) }
 412   ${REL_LARGE}
 413   ${IREL_IN_PLT+$REL_IFUNC}
 414   ${IREL_IN_PLT+$RELA_IFUNC}
 415   ${IREL_IN_PLT-$REL_IPLT}
 416   ${IREL_IN_PLT-$RELA_IPLT}
 417 EOF
 418
 419 if [ -n "$COMBRELOC" ]; then
 420 cat >> ldscripts/dyntmp.$$ <<EOF
 421   .rel.dyn      ${RELOCATING-0} :
 422     {
 423 EOF
 424 sed -e '/^[     ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rela\./d;/__rela_iplt_/d;s/^.*: { *\(.*\)}$/      \1/' $COMBRELOC >> ldscripts/dyntmp.$$
 425 cat >> ldscripts/dyntmp.$$ <<EOF
 426     }
 427   .rela.dyn     ${RELOCATING-0} :
 428     {
 429 EOF
 430 sed -e '/^[     ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rel\./d;/__rel_iplt_/d;s/^.*: { *\(.*\)}/      \1/' $COMBRELOC >> ldscripts/dyntmp.$$
 431 cat >> ldscripts/dyntmp.$$ <<EOF
 432     }
 433 EOF
 434 fi
 435
 436 cat >> ldscripts/dyntmp.$$ <<EOF
 437   .rel.plt      ${RELOCATING-0} :
 438     {
 439       *(.rel.plt)
 440       ${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_start = .);}}}
 441       ${IREL_IN_PLT+${RELOCATING+*(.rel.iplt)}}
 442       ${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_end = .);}}}
 443     }
 444   .rela.plt     ${RELOCATING-0} :
 445     {
 446       *(.rela.plt)
 447       ${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_start = .);}}}
 448       ${IREL_IN_PLT+${RELOCATING+*(.rela.iplt)}}
 449       ${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_end = .);}}}
 450     }
 451   ${OTHER_PLT_RELOC_SECTIONS}
 452 EOF
 453
 454 emit_dyn()
 455 {
 456   if test -z "${NO_REL_RELOCS}${NO_RELA_RELOCS}"; then
 457     cat ldscripts/dyntmp.$$
 458   else
 459     if test -z "${NO_REL_RELOCS}"; then
 460       sed -e '/^[       ]*\.rela\.[^}]*$/,/}/d;/^[      ]*\.rela\./d;/__rela_iplt_/d' ldscripts/dyntmp.$$
 461     fi
 462     if test -z "${NO_RELA_RELOCS}"; then
 463       sed -e '/^[       ]*\.rel\.[^}]*$/,/}/d;/^[       ]*\.rel\./d;/__rel_iplt_/d' ldscripts/dyntmp.$$
 464     fi
 465   fi
 466   rm -f ldscripts/dyntmp.$$
 467 }
 468
 469 test -n "${NON_ALLOC_DYN}${SEPARATE_CODE}" || emit_dyn
 470
 471 cat <<EOF
 472   .init         ${RELOCATING-0} :
 473   {
 474     ${RELOCATING+${INIT_START}}
 475     KEEP (*(SORT_NONE(.init)))
 476     ${RELOCATING+${INIT_END}}
 477   } ${FILL}
 478
 479   ${TEXT_PLT+${PLT_NEXT_DATA-${PLT}}}
 480   ${TINY_READONLY_SECTION}
 481   .text         ${RELOCATING-0} :
 482   {
 483     ${RELOCATING+${TEXT_START_SYMBOLS}}
 484     ${RELOCATING+*(.text.unlikely .text.*_unlikely .text.unlikely.*)}
 485     ${RELOCATING+*(.text.exit .text.exit.*)}
 486     ${RELOCATING+*(.text.startup .text.startup.*)}
 487     ${RELOCATING+*(.text.hot .text.hot.*)}
 488     *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
 489     /* .gnu.warning sections are handled specially by elf32.em.  */
 490     *(.gnu.warning)
 491     ${RELOCATING+${OTHER_TEXT_SECTIONS}}
 492   } ${FILL}
 493   .fini         ${RELOCATING-0} :
 494   {
 495     ${RELOCATING+${FINI_START}}
 496     KEEP (*(SORT_NONE(.fini)))
 497     ${RELOCATING+${FINI_END}}
 498   } ${FILL}
 499   ${RELOCATING+PROVIDE (__${ETEXT_NAME} = .);}
 500   ${RELOCATING+PROVIDE (_${ETEXT_NAME} = .);}
 501   ${RELOCATING+PROVIDE (${ETEXT_NAME} = .);}
 502 EOF
 503
 504 if test -n "${SEPARATE_CODE}"; then
 505   if test -n "${RODATA_ADDR}"; then
 506     RODATA_ADDR="\
 507 SEGMENT_START(\"rodata-segment\", ${RODATA_ADDR}) + SIZEOF_HEADERS"
 508   else
 509     RODATA_ADDR="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
 510     RODATA_ADDR="SEGMENT_START(\"rodata-segment\", ${RODATA_ADDR})"
 511   fi
 512   if test -n "${SHLIB_RODATA_ADDR}"; then
 513     SHLIB_RODATA_ADDR="\
 514 SEGMENT_START(\"rodata-segment\", ${SHLIB_RODATA_ADDR}) + SIZEOF_HEADERS"
 515   else
 516     SHLIB_RODATA_ADDR="SEGMENT_START(\"rodata-segment\", ${SHLIB_RODATA_ADDR})"
 517     SHLIB_RODATA_ADDR="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
 518   fi
 519   cat <<EOF
 520   /* Adjust the address for the rodata segment.  We want to adjust up to
 521      the same address within the page on the next page up.  */
 522   ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${RODATA_ADDR};}}}
 523   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_RODATA_ADDR};}}
 524   ${CREATE_PIE+${RELOCATING+. = ${SHLIB_RODATA_ADDR};}}
 525 EOF
 526   emit_early_ro
 527   emit_dyn
 528 fi
 529
 530 cat <<EOF
 531   ${WRITABLE_RODATA-${RODATA}}
 532   .${RODATA_NAME}1      ${RELOCATING-0} : { *(.${RODATA_NAME}1) }
 533   ${CREATE_SHLIB-${SDATA2}}
 534   ${CREATE_SHLIB-${SBSS2}}
 535   ${OTHER_READONLY_SECTIONS}
 536   .eh_frame_hdr : { *(.eh_frame_hdr) }
 537   .eh_frame     ${RELOCATING-0} : ONLY_IF_RO { KEEP (*(.eh_frame)) }
 538   .gcc_except_table ${RELOCATING-0} : ONLY_IF_RO { *(.gcc_except_table
 539   .gcc_except_table.*) }
 540   /* These sections are generated by the Sun/Oracle C++ compiler.  */
 541   .exception_ranges ${RELOCATING-0} : ONLY_IF_RO { *(.exception_ranges
 542   .exception_ranges*) }
 543   ${TEXT_PLT+${PLT_NEXT_DATA+${PLT}}}
 544
 545   /* Adjust the address for the data segment.  We want to adjust up to
 546      the same address within the page on the next page up.  */
 547   ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}}
 548   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
 549   ${CREATE_PIE+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
 550
 551   /* Exception handling  */
 552   .eh_frame     ${RELOCATING-0} : ONLY_IF_RW { KEEP (*(.eh_frame)) }
 553   .gcc_except_table ${RELOCATING-0} : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) }
 554   .exception_ranges ${RELOCATING-0} : ONLY_IF_RW { *(.exception_ranges .exception_ranges*) }
 555
 556   /* Thread Local Storage sections  */
 557   .tdata        ${RELOCATING-0} : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) }
 558   .tbss         ${RELOCATING-0} : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} }
 559
 560   .preinit_array   ${RELOCATING-0} :
 561   {
 562     ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__preinit_array_start = .);}}
 563     KEEP (*(.preinit_array))
 564     ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__preinit_array_end = .);}}
 565   }
 566   ${RELOCATING+${INIT_ARRAY}}
 567   ${RELOCATING+${FINI_ARRAY}}
 568   ${SMALL_DATA_CTOR-${RELOCATING+${CTOR}}}
 569   ${SMALL_DATA_DTOR-${RELOCATING+${DTOR}}}
 570   .jcr          ${RELOCATING-0} : { KEEP (*(.jcr)) }
 571
 572   ${RELOCATING+${DATARELRO}}
 573   ${OTHER_RELRO_SECTIONS}
 574   ${TEXT_DYNAMIC-${DYNAMIC}}
 575   ${DATA_GOT+${RELRO_NOW+${GOT}}}
 576   ${DATA_GOT+${RELRO_NOW+${GOTPLT}}}
 577   ${DATA_GOT+${RELRO_NOW-${SEPARATE_GOTPLT+${GOT}}}}
 578   ${RELOCATING+${DATA_SEGMENT_RELRO_END}}
 579   ${INITIAL_READWRITE_SECTIONS}
 580   ${DATA_GOT+${RELRO_NOW-${SEPARATE_GOTPLT-${GOT}}}}
 581   ${DATA_GOT+${RELRO_NOW-${GOTPLT}}}
 582
 583   ${DATA_PLT+${PLT_BEFORE_GOT-${PLT}}}
 584
 585   .data         ${RELOCATING-0} :
 586   {
 587     ${RELOCATING+${DATA_START_SYMBOLS}}
 588     *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
 589     ${CONSTRUCTING+SORT(CONSTRUCTORS)}
 590   }
 591   .data1        ${RELOCATING-0} : { *(.data1) }
 592   ${WRITABLE_RODATA+${RODATA}}
 593   ${OTHER_READWRITE_SECTIONS}
 594   ${SMALL_DATA_CTOR+${RELOCATING+${CTOR}}}
 595   ${SMALL_DATA_DTOR+${RELOCATING+${DTOR}}}
 596   ${DATA_PLT+${PLT_BEFORE_GOT+${PLT}}}
 597   ${SDATA_GOT+${RELOCATING+${OTHER_GOT_SYMBOLS+. = .; ${OTHER_GOT_SYMBOLS}}}}
 598   ${SDATA_GOT+${GOT}}
 599   ${SDATA_GOT+${OTHER_GOT_SECTIONS}}
 600   ${SDATA}
 601   ${OTHER_SDATA_SECTIONS}
 602   ${RELOCATING+${DATA_END_SYMBOLS-${USER_LABEL_PREFIX}_edata = .; PROVIDE (${USER_LABEL_PREFIX}edata = .);}}
 603   ${RELOCATING+. = .;}
 604   ${RELOCATING+${USER_LABEL_PREFIX}__bss_start = .;}
 605   ${RELOCATING+${OTHER_BSS_SYMBOLS}}
 606   ${SBSS}
 607   ${BSS_PLT+${PLT}}
 608   .${BSS_NAME}          ${RELOCATING-0} :
 609   {
 610    *(.dyn${BSS_NAME})
 611    *(.${BSS_NAME}${RELOCATING+ .${BSS_NAME}.* .gnu.linkonce.b.*})
 612    *(COMMON)
 613    /* Align here to ensure that the .bss section occupies space up to
 614       _end.  Align after .bss to ensure correct alignment even if the
 615       .bss section disappears because there are no input sections.
 616       FIXME: Why do we need it? When there is no .bss section, we don't
 617       pad the .data section.  */
 618    ${RELOCATING+. = ALIGN(. != 0 ? ${ALIGNMENT} : 1);}
 619   }
 620   ${OTHER_BSS_SECTIONS}
 621   ${LARGE_BSS_AFTER_BSS+${LARGE_BSS}}
 622   ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
 623   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 624 EOF
 625
 626 LARGE_DATA_ADDR=". = SEGMENT_START(\"ldata-segment\", ${LARGE_DATA_ADDR-.});"
 627 SHLIB_LARGE_DATA_ADDR=". = SEGMENT_START(\"ldata-segment\", ${SHLIB_LARGE_DATA_ADDR-.});"
 628
 629   cat <<EOF
 630   ${RELOCATING+${CREATE_SHLIB-${CREATE_PIE-${LARGE_DATA_ADDR}}}}
 631   ${RELOCATING+${CREATE_SHLIB+${SHLIB_LARGE_DATA_ADDR}}}
 632   ${RELOCATING+${CREATE_PIE+${SHLIB_LARGE_DATA_ADDR}}}
 633   ${LARGE_SECTIONS}
 634   ${LARGE_BSS_AFTER_BSS-${LARGE_BSS}}
 635   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 636   ${RELOCATING+${OTHER_END_SYMBOLS}}
 637   ${RELOCATING+${END_SYMBOLS-${USER_LABEL_PREFIX}_end = .; PROVIDE (${USER_LABEL_PREFIX}end = .);}}
 638   ${RELOCATING+${DATA_SEGMENT_END}}
 639 EOF
 640
 641 test -z "${NON_ALLOC_DYN}" || emit_dyn
 642
 643 cat <<EOF
 644   /* Stabs debugging sections.  */
 645   .stab          0 : { *(.stab) }
 646   .stabstr       0 : { *(.stabstr) }
 647   .stab.excl     0 : { *(.stab.excl) }
 648   .stab.exclstr  0 : { *(.stab.exclstr) }
 649   .stab.index    0 : { *(.stab.index) }
 650   .stab.indexstr 0 : { *(.stab.indexstr) }
 651
 652   .comment       0 : { *(.comment) }
 653
 654 EOF
 655
 656 . $srcdir/scripttempl/DWARF.sc
 657
 658 cat <<EOF
 659
 660   ${TINY_DATA_SECTION}
 661   ${TINY_BSS_SECTION}
 662
 663   ${STACK_ADDR+${STACK}}
 664   ${ATTRS_SECTIONS}
 665   ${OTHER_SECTIONS}
 666   ${RELOCATING+${OTHER_SYMBOLS}}
 667   ${RELOCATING+${DISCARDED}}
 668 }
 669 EOF