ld/scripttempl/elf64bpf.sc

   1 # Copyright (C) 2014-2023 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_RELRO_SECTIONS_2 - as above, but after .dynamic in text segment
  24 #       OTHER_BSS_SECTIONS - other than .bss .sbss ...
  25 #       ATTRS_SECTIONS - at the end
  26 #       OTHER_SECTIONS - at the end
  27 #       EXECUTABLE_SYMBOLS - symbols that must be defined for an
  28 #               executable (e.g., _DYNAMIC_LINK)
  29 #       TEXT_START_ADDR - the first byte of the text segment, after any
  30 #               headers.
  31 #       TEXT_BASE_ADDRESS - the first byte of the text segment.
  32 #       TEXT_START_SYMBOLS - symbols that appear at the start of the
  33 #               .text section.
  34 #       DATA_START_SYMBOLS - symbols that appear at the start of the
  35 #               .data section.
  36 #       DATA_END_SYMBOLS - symbols that appear at the end of the
  37 #               writeable data sections.
  38 #       OTHER_GOT_SYMBOLS - symbols defined just before .got.
  39 #       OTHER_GOT_SECTIONS - sections just after .got.
  40 #       OTHER_PLT_SECTIONS - sections just after .plt.
  41 #       OTHER_SDATA_SECTIONS - sections just after .sdata.
  42 #       OTHER_BSS_SYMBOLS - symbols that appear at the start of the
  43 #               .bss section besides __bss_start.
  44 #       PLT_NEXT_DATA - .plt next to data segment when .plt is in text segment.
  45 #       DATA_PLT - .plt should be in data segment, not text segment.
  46 #       PLT_BEFORE_GOT - .plt just before .got when .plt is in data segement.
  47 #       BSS_PLT - .plt should be in bss segment
  48 #       NO_REL_RELOCS - Don't include .rel.* sections in script
  49 #       NO_RELA_RELOCS - Don't include .rela.* sections in script
  50 #       NON_ALLOC_DYN - Place dynamic sections after data segment.
  51 #       TEXT_DYNAMIC - .dynamic in text segment, not data segment.
  52 #       EMBEDDED - whether this is for an embedded system.
  53 #       SHLIB_TEXT_START_ADDR - if set, add to SIZEOF_HEADERS to set
  54 #               start address of shared library.
  55 #       INPUT_FILES - INPUT command of files to always include
  56 #       WRITABLE_RODATA - if set, the .rodata section should be writable
  57 #       INIT_START, INIT_END -  statements just before and just after
  58 #       combination of .init sections.
  59 #       FINI_START, FINI_END - statements just before and just after
  60 #       combination of .fini sections.
  61 #       STACK_ADDR - start of a .stack section.
  62 #       OTHER_SYMBOLS - symbols to place right at the end of the script.
  63 #       ETEXT_NAME - name of a symbol for the end of the text section,
  64 #               normally etext.
  65 #       SEPARATE_CODE - if set, .text and similar sections containing
  66 #               actual machine instructions must be in wholly disjoint
  67 #               pages from any other data, including headers
  68 #       SEPARATE_GOTPLT - if set, .got.plt should be separate output section,
  69 #               so that .got can be in the RELRO area.  It should be set to
  70 #               the number of bytes in the beginning of .got.plt which can be
  71 #               in the RELRO area as well.
  72 #       USER_LABEL_PREFIX - prefix to add to user-visible symbols.
  73 #       RODATA_NAME, SDATA_NAME, SBSS_NAME, BSS_NAME - base parts of names
  74 #               for standard sections, without initial "." or suffixes.
  75 #
  76 # When adding sections, do note that the names of some sections are used
  77 # when specifying the start address of the next.
  78 #
  79
  80 #  Many sections come in three flavours.  There is the 'real' section,
  81 #  like ".data".  Then there are the per-procedure or per-variable
  82 #  sections, generated by -ffunction-sections and -fdata-sections in GCC,
  83 #  and useful for --gc-sections, which for a variable "foo" might be
  84 #  ".data.foo".  Then there are the linkonce sections, for which the linker
  85 #  eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
  86 #  The exact correspondences are:
  87 #
  88 #  Section      Linkonce section
  89 #  .text        .gnu.linkonce.t.foo
  90 #  .rodata      .gnu.linkonce.r.foo
  91 #  .data        .gnu.linkonce.d.foo
  92 #  .bss         .gnu.linkonce.b.foo
  93 #  .sdata       .gnu.linkonce.s.foo
  94 #  .sbss        .gnu.linkonce.sb.foo
  95 #  .sdata2      .gnu.linkonce.s2.foo
  96 #  .sbss2       .gnu.linkonce.sb2.foo
  97 #  .debug_info  .gnu.linkonce.wi.foo
  98 #  .tdata       .gnu.linkonce.td.foo
  99 #  .tbss        .gnu.linkonce.tb.foo
 100 #  .lrodata     .gnu.linkonce.lr.foo
 101 #  .ldata       .gnu.linkonce.l.foo
 102 #  .lbss        .gnu.linkonce.lb.foo
 103 #
 104 #  Each of these can also have corresponding .rel.* and .rela.* sections.
 105
 106 if test -n "$NOP"; then
 107   FILL="=$NOP"
 108 else
 109   FILL=
 110 fi
 111
 112 test -n "$CREATE_SHLIB$CREATE_PIE" && CREATE_PIC=" "
 113 test -z "$RODATA_NAME" && RODATA_NAME=rodata
 114 test -z "$SDATA_NAME" && SDATA_NAME=sdata
 115 test -z "$SBSS_NAME" && SBSS_NAME=sbss
 116 test -z "$BSS_NAME" && BSS_NAME=bss
 117 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
 118 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
 119 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
 120 test -z "${ELFSIZE}" && ELFSIZE=32
 121 test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
 122 test "$LD_FLAG" = "N" && DATA_ADDR=.
 123 test -z "${ETEXT_NAME}" && ETEXT_NAME=${USER_LABEL_PREFIX}etext
 124 test -n "$RELRO_NOW" && unset SEPARATE_GOTPLT
 125 test -z "$ATTRS_SECTIONS" && ATTRS_SECTIONS=".gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }"
 126 if test -z "$DATA_SEGMENT_ALIGN"; then
 127   test -n "$CREATE_SHLIB$CREATE_PIE" && test -n "$SHLIB_DATA_ADDR" && COMMONPAGESIZE=""
 128   test -z "$CREATE_SHLIB$CREATE_PIE" && test -n "$DATA_ADDR" && COMMONPAGESIZE=""
 129   DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
 130   DATA_SEGMENT_RELRO_END=""
 131   DATA_SEGMENT_END=""
 132   if test -n "${COMMONPAGESIZE}"; then
 133     if test "${SEGMENT_SIZE}" != "${MAXPAGESIZE}"; then
 134       DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
 135     else
 136       DATA_SEGMENT_ALIGN="DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
 137     fi
 138     DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
 139     DATA_SEGMENT_RELRO_END=". = DATA_SEGMENT_RELRO_END (${SEPARATE_GOTPLT-0}, .);"
 140   fi
 141 fi
 142 if test -z "${INITIAL_READONLY_SECTIONS}${CREATE_SHLIB}"; then
 143   INITIAL_READONLY_SECTIONS=".interp       ${RELOCATING-0} : { *(.interp) }"
 144 fi
 145 if test -z "$PLT"; then
 146   IPLT=".iplt         ${RELOCATING-0} : { *(.iplt) }"
 147   PLT=".plt          ${RELOCATING-0} : { *(.plt)${RELOCATING+${IREL_IN_PLT+ *(.iplt)}} }
 148   ${IREL_IN_PLT-$IPLT}"
 149 fi
 150 test -n "${DATA_PLT-${BSS_PLT-text}}" && TEXT_PLT=
 151 if test -z "$GOT"; then
 152   if test -z "$SEPARATE_GOTPLT"; then
 153     GOT=".got          ${RELOCATING-0} : {${RELOCATING+ *(.got.plt) *(.igot.plt)} *(.got)${RELOCATING+ *(.igot)} }"
 154   else
 155     GOT=".got          ${RELOCATING-0} : { *(.got)${RELOCATING+ *(.igot)} }"
 156     GOTPLT=".got.plt      ${RELOCATING-0} : { *(.got.plt)${RELOCATING+ *(.igot.plt)} }"
 157   fi
 158 fi
 159 REL_IFUNC=".rel.ifunc    ${RELOCATING-0} : { *(.rel.ifunc) }"
 160 RELA_IFUNC=".rela.ifunc   ${RELOCATING-0} : { *(.rela.ifunc) }"
 161 REL_IPLT=".rel.iplt     ${RELOCATING-0} :
 162     {
 163       ${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_start = .);}}
 164       *(.rel.iplt)
 165       ${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_end = .);}}
 166     }"
 167 RELA_IPLT=".rela.iplt    ${RELOCATING-0} :
 168     {
 169       ${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_start = .);}}
 170       *(.rela.iplt)
 171       ${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_end = .);}}
 172     }"
 173 DYNAMIC=".dynamic      ${RELOCATING-0} : { *(.dynamic) }"
 174 RODATA=".${RODATA_NAME}       ${RELOCATING-0} : { *(.${RODATA_NAME}${RELOCATING+ .${RODATA_NAME}.* .gnu.linkonce.r.*}) }"
 175 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.*) }"
 176 DISCARDED="/DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }"
 177 if test -z "${NO_SMALL_DATA}"; then
 178   SBSS=".${SBSS_NAME}         ${RELOCATING-0} :
 179   {
 180     ${RELOCATING+${SBSS_START_SYMBOLS}}
 181     ${CREATE_SHLIB+*(.${SBSS_NAME}2 .${SBSS_NAME}2.* .gnu.linkonce.sb2.*)}
 182     ${RELOCATING+*(.dyn${SBSS_NAME})}
 183     *(.${SBSS_NAME}${RELOCATING+ .${SBSS_NAME}.* .gnu.linkonce.sb.*})
 184     ${RELOCATING+*(.scommon)}
 185     ${RELOCATING+${SBSS_END_SYMBOLS}}
 186   }"
 187   SBSS2=".${SBSS_NAME}2        ${RELOCATING-0} : { *(.${SBSS_NAME}2${RELOCATING+ .${SBSS_NAME}2.* .gnu.linkonce.sb2.*}) }"
 188   SDATA="/* We want the small data sections together, so single-instruction offsets
 189      can access them all, and initialized data all before uninitialized, so
 190      we can shorten the on-disk segment size.  */
 191   .${SDATA_NAME}        ${RELOCATING-0} :
 192   {
 193     ${RELOCATING+${SDATA_START_SYMBOLS}}
 194     ${CREATE_SHLIB+*(.${SDATA_NAME}2 .${SDATA_NAME}2.* .gnu.linkonce.s2.*)}
 195     *(.${SDATA_NAME}${RELOCATING+ .${SDATA_NAME}.* .gnu.linkonce.s.*})
 196   }"
 197   SDATA2=".${SDATA_NAME}2       ${RELOCATING-0} :
 198   {
 199     ${RELOCATING+${SDATA2_START_SYMBOLS}}
 200     *(.${SDATA_NAME}2${RELOCATING+ .${SDATA_NAME}2.* .gnu.linkonce.s2.*})
 201   }"
 202   REL_SDATA=".rel.${SDATA_NAME}    ${RELOCATING-0} : { *(.rel.${SDATA_NAME}${RELOCATING+ .rel.${SDATA_NAME}.* .rel.gnu.linkonce.s.*}) }
 203   .rela.${SDATA_NAME}   ${RELOCATING-0} : { *(.rela.${SDATA_NAME}${RELOCATING+ .rela.${SDATA_NAME}.* .rela.gnu.linkonce.s.*}) }"
 204   REL_SBSS=".rel.${SBSS_NAME}     ${RELOCATING-0} : { *(.rel.${SBSS_NAME}${RELOCATING+ .rel.${SBSS_NAME}.* .rel.gnu.linkonce.sb.*}) }
 205   .rela.${SBSS_NAME}    ${RELOCATING-0} : { *(.rela.${SBSS_NAME}${RELOCATING+ .rela.${SBSS_NAME}.* .rela.gnu.linkonce.sb.*}) }"
 206   REL_SDATA2=".rel.${SDATA_NAME}2   ${RELOCATING-0} : { *(.rel.${SDATA_NAME}2${RELOCATING+ .rel.${SDATA_NAME}2.* .rel.gnu.linkonce.s2.*}) }
 207   .rela.${SDATA_NAME}2  ${RELOCATING-0} : { *(.rela.${SDATA_NAME}2${RELOCATING+ .rela.${SDATA_NAME}2.* .rela.gnu.linkonce.s2.*}) }"
 208   REL_SBSS2=".rel.${SBSS_NAME}2    ${RELOCATING-0} : { *(.rel.${SBSS_NAME}2${RELOCATING+ .rel.${SBSS_NAME}2.* .rel.gnu.linkonce.sb2.*}) }
 209   .rela.${SBSS_NAME}2   ${RELOCATING-0} : { *(.rela.${SBSS_NAME}2${RELOCATING+ .rela.${SBSS_NAME}2.* .rela.gnu.linkonce.sb2.*}) }"
 210 else
 211   NO_SMALL_DATA=" "
 212 fi
 213 if test -z "${SDATA_GOT}${DATA_GOT}"; then
 214   if test -n "${NO_SMALL_DATA}"; then
 215     DATA_GOT=" "
 216   fi
 217 fi
 218 if test -z "${SDATA_GOT}${DATA_GOT}"; then
 219   if test -z "${NO_SMALL_DATA}"; then
 220     SDATA_GOT=" "
 221   fi
 222 fi
 223 test -n "$SEPARATE_GOTPLT" && SEPARATE_GOTPLT=" "
 224 test "${LARGE_SECTIONS}" = "yes" && REL_LARGE="
 225   .rel.ldata    ${RELOCATING-0} : { *(.rel.ldata${RELOCATING+ .rel.ldata.* .rel.gnu.linkonce.l.*}) }
 226   .rela.ldata   ${RELOCATING-0} : { *(.rela.ldata${RELOCATING+ .rela.ldata.* .rela.gnu.linkonce.l.*}) }
 227   .rel.lbss     ${RELOCATING-0} : { *(.rel.lbss${RELOCATING+ .rel.lbss.* .rel.gnu.linkonce.lb.*}) }
 228   .rela.lbss    ${RELOCATING-0} : { *(.rela.lbss${RELOCATING+ .rela.lbss.* .rela.gnu.linkonce.lb.*}) }
 229   .rel.lrodata  ${RELOCATING-0} : { *(.rel.lrodata${RELOCATING+ .rel.lrodata.* .rel.gnu.linkonce.lr.*}) }
 230   .rela.lrodata ${RELOCATING-0} : { *(.rela.lrodata${RELOCATING+ .rela.lrodata.* .rela.gnu.linkonce.lr.*}) }"
 231 test "${LARGE_SECTIONS}" = "yes" && LARGE_BSS="
 232   .lbss ${RELOCATING-0} :
 233   {
 234     ${RELOCATING+*(.dynlbss)}
 235     *(.lbss${RELOCATING+ .lbss.* .gnu.linkonce.lb.*})
 236     ${RELOCATING+*(LARGE_COMMON)}
 237   }"
 238 test "${LARGE_SECTIONS}" = "yes" && LARGE_SECTIONS="
 239   .lrodata ${RELOCATING-0} ${RELOCATING+ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))} :
 240   {
 241     *(.lrodata${RELOCATING+ .lrodata.* .gnu.linkonce.lr.*})
 242   }
 243   .ldata ${RELOCATING-0} ${RELOCATING+ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))} :
 244   {
 245     *(.ldata${RELOCATING+ .ldata.* .gnu.linkonce.l.*})
 246     ${RELOCATING+. = ALIGN(. != 0 ? ${ALIGNMENT} : 1);}
 247   }"
 248 if test "${ENABLE_INITFINI_ARRAY}" = "yes"; then
 249   SORT_INIT_ARRAY="KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))"
 250   SORT_FINI_ARRAY="KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))"
 251   CTORS_IN_INIT_ARRAY="EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors"
 252   DTORS_IN_FINI_ARRAY="EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors"
 253 else
 254   SORT_INIT_ARRAY="KEEP (*(SORT(.init_array.*)))"
 255   SORT_FINI_ARRAY="KEEP (*(SORT(.fini_array.*)))"
 256   CTORS_IN_INIT_ARRAY=
 257   DTORS_IN_FINI_ARRAY=
 258 fi
 259 PREINIT_ARRAY=".preinit_array    :
 260   {
 261     ${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__preinit_array_start = .);}
 262     KEEP (*(.preinit_array))
 263     ${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__preinit_array_end = .);}
 264   }"
 265 INIT_ARRAY=".init_array    :
 266   {
 267     ${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__init_array_start = .);}
 268     ${SORT_INIT_ARRAY}
 269     KEEP (*(.init_array ${CTORS_IN_INIT_ARRAY}))
 270     ${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__init_array_end = .);}
 271   }"
 272 FINI_ARRAY=".fini_array    :
 273   {
 274     ${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__fini_array_start = .);}
 275     ${SORT_FINI_ARRAY}
 276     KEEP (*(.fini_array ${DTORS_IN_FINI_ARRAY}))
 277     ${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__fini_array_end = .);}
 278   }"
 279 CTOR=".ctors        ${CONSTRUCTING-0} :
 280   {
 281     ${CONSTRUCTING+${CTOR_START}}
 282     /* gcc uses crtbegin.o to find the start of
 283        the constructors, so we make sure it is
 284        first.  Because this is a wildcard, it
 285        doesn't matter if the user does not
 286        actually link against crtbegin.o; the
 287        linker won't look for a file to match a
 288        wildcard.  The wildcard also means that it
 289        doesn't matter which directory crtbegin.o
 290        is in.  */
 291
 292     KEEP (*crtbegin.o(.ctors))
 293     KEEP (*crtbegin?.o(.ctors))
 294
 295     /* We don't want to include the .ctor section from
 296        the crtend.o file until after the sorted ctors.
 297        The .ctor section from the crtend file contains the
 298        end of ctors marker and it must be last */
 299
 300     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))
 301     KEEP (*(SORT(.ctors.*)))
 302     KEEP (*(.ctors))
 303     ${CONSTRUCTING+${CTOR_END}}
 304   }"
 305 DTOR=".dtors        ${CONSTRUCTING-0} :
 306   {
 307     ${CONSTRUCTING+${DTOR_START}}
 308     KEEP (*crtbegin.o(.dtors))
 309     KEEP (*crtbegin?.o(.dtors))
 310     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
 311     KEEP (*(SORT(.dtors.*)))
 312     KEEP (*(.dtors))
 313     ${CONSTRUCTING+${DTOR_END}}
 314   }"
 315 STACK=".stack        ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
 316   {
 317     ${RELOCATING+${USER_LABEL_PREFIX}_stack = .;}
 318     *(.stack)
 319     ${RELOCATING+${STACK_SENTINEL}}
 320   }"
 321
 322 TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${TEXT_START_ADDR})"
 323 SHLIB_TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${SHLIB_TEXT_START_ADDR:-0})"
 324
 325 # Don't bother with separate code segment when there are data sections
 326 # between .plt and .text.
 327 if test -z "$TINY_READONLY_SECTION"; then
 328   case "$LD_FLAG" in
 329     *textonly*)
 330       SEPARATE_TEXT=" "
 331       TEXT_SEGMENT_ALIGN=". = ALIGN(${MAXPAGESIZE});"
 332       ;;
 333   esac
 334 fi
 335
 336 if [ -z "$SEPARATE_CODE" ]; then
 337   SIZEOF_HEADERS_CODE=" + SIZEOF_HEADERS"
 338 else
 339   SIZEOF_HEADERS_CODE=
 340 fi
 341
 342 # If this is for an embedded system, don't add SIZEOF_HEADERS.
 343 if [ -z "$EMBEDDED" ]; then
 344    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}${SIZEOF_HEADERS_CODE}"
 345 else
 346    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
 347 fi
 348
 349 cat <<EOF
 350 /* Copyright (C) 2014-2023 Free Software Foundation, Inc.
 351
 352    Copying and distribution of this script, with or without modification,
 353    are permitted in any medium without royalty provided the copyright
 354    notice and this notice are preserved.  */
 355
 356 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
 357               "${LITTLE_OUTPUT_FORMAT}")
 358 OUTPUT_ARCH(${OUTPUT_ARCH})
 359
 360 ${RELOCATING+${LIB_SEARCH_DIRS}}
 361 ${RELOCATING+${CREATE_SHLIB-${EXECUTABLE_SYMBOLS}}}
 362 ${RELOCATING+${INPUT_FILES}}
 363 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
 364   if gld -r is used and the intermediate file has sections starting
 365   at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
 366   bug.  But for now assigning the zero vmas works.  */}
 367
 368 SECTIONS
 369 {
 370   ${RELOCATING+${SEPARATE_TEXT-/* Read-only sections, merged into text segment: */}}
 371   ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+PROVIDE (__executable_start = ${TEXT_START_ADDR}); . = ${TEXT_BASE_ADDRESS};}}}
 372   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR}${SIZEOF_HEADERS_CODE};}}
 373   ${CREATE_PIE+${RELOCATING+PROVIDE (__executable_start = ${SHLIB_TEXT_START_ADDR}); . = ${SHLIB_TEXT_START_ADDR}${SIZEOF_HEADERS_CODE};}}
 374 EOF
 375
 376 emit_early_ro()
 377 {
 378   cat <<EOF
 379   ${INITIAL_READONLY_SECTIONS}
 380   .note.gnu.build-id ${RELOCATING-0}: { *(.note.gnu.build-id) }
 381 EOF
 382 }
 383
 384 test -n "${SEPARATE_CODE}" || emit_early_ro
 385
 386 test -n "${RELOCATING+0}" || unset NON_ALLOC_DYN
 387 test -z "${NON_ALLOC_DYN}" || TEXT_DYNAMIC=
 388 cat > ldscripts/dyntmp.$$ <<EOF
 389   ${TEXT_DYNAMIC+${DYNAMIC}}
 390   .hash         ${RELOCATING-0} : { *(.hash) }
 391   .gnu.hash     ${RELOCATING-0} : { *(.gnu.hash) }
 392   .dynsym       ${RELOCATING-0} : { *(.dynsym) }
 393   .dynstr       ${RELOCATING-0} : { *(.dynstr) }
 394   .gnu.version  ${RELOCATING-0} : { *(.gnu.version) }
 395   .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
 396   .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
 397 EOF
 398
 399 if [ "x$COMBRELOC" = x ]; then
 400   COMBRELOCCAT="cat >> ldscripts/dyntmp.$$"
 401 else
 402   COMBRELOCCAT="cat > $COMBRELOC"
 403 fi
 404 eval $COMBRELOCCAT <<EOF
 405   ${INITIAL_RELOC_SECTIONS}
 406   .rel.init     ${RELOCATING-0} : { *(.rel.init) }
 407   .rela.init    ${RELOCATING-0} : { *(.rela.init) }
 408   .rel.text     ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
 409   .rela.text    ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
 410   .rel.fini     ${RELOCATING-0} : { *(.rel.fini) }
 411   .rela.fini    ${RELOCATING-0} : { *(.rela.fini) }
 412   .rel.${RODATA_NAME}   ${RELOCATING-0} : { *(.rel.${RODATA_NAME}${RELOCATING+ .rel.${RODATA_NAME}.* .rel.gnu.linkonce.r.*}) }
 413   .rela.${RODATA_NAME}  ${RELOCATING-0} : { *(.rela.${RODATA_NAME}${RELOCATING+ .rela.${RODATA_NAME}.* .rela.gnu.linkonce.r.*}) }
 414   ${OTHER_READONLY_RELOC_SECTIONS}
 415   .rel.data.rel.ro ${RELOCATING-0} : { *(.rel.data.rel.ro${RELOCATING+ .rel.data.rel.ro.* .rel.gnu.linkonce.d.rel.ro.*}) }
 416   .rela.data.rel.ro ${RELOCATING-0} : { *(.rela.data.rel.ro${RELOCATING+ .rela.data.rel.ro.* .rela.gnu.linkonce.d.rel.ro.*}) }
 417   .rel.data     ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
 418   .rela.data    ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
 419   ${OTHER_READWRITE_RELOC_SECTIONS}
 420   .rel.tdata    ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
 421   .rela.tdata   ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
 422   .rel.tbss     ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
 423   .rela.tbss    ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
 424   .rel.ctors    ${RELOCATING-0} : { *(.rel.ctors) }
 425   .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors) }
 426   .rel.dtors    ${RELOCATING-0} : { *(.rel.dtors) }
 427   .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors) }
 428   .rel.got      ${RELOCATING-0} : { *(.rel.got) }
 429   .rela.got     ${RELOCATING-0} : { *(.rela.got) }
 430   ${OTHER_GOT_RELOC_SECTIONS}
 431   ${REL_SDATA}
 432   ${REL_SBSS}
 433   ${REL_SDATA2}
 434   ${REL_SBSS2}
 435   .rel.${BSS_NAME}      ${RELOCATING-0} : { *(.rel.${BSS_NAME}${RELOCATING+ .rel.${BSS_NAME}.* .rel.gnu.linkonce.b.*}) }
 436   .rela.${BSS_NAME}     ${RELOCATING-0} : { *(.rela.${BSS_NAME}${RELOCATING+ .rela.${BSS_NAME}.* .rela.gnu.linkonce.b.*}) }
 437   ${REL_LARGE}
 438   ${IREL_IN_PLT+$REL_IFUNC}
 439   ${IREL_IN_PLT+$RELA_IFUNC}
 440   ${IREL_IN_PLT-$REL_IPLT}
 441   ${IREL_IN_PLT-$RELA_IPLT}
 442 EOF
 443
 444 if [ -n "$COMBRELOC" ]; then
 445 cat >> ldscripts/dyntmp.$$ <<EOF
 446   .rel.dyn      ${RELOCATING-0} :
 447     {
 448 EOF
 449 sed -e '/^[      ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rela\./d;/__rela_iplt_/d;s/^.*: { *\(.*\)}$/      \1/' $COMBRELOC >> ldscripts/dyntmp.$$
 450 cat >> ldscripts/dyntmp.$$ <<EOF
 451     }
 452   .rela.dyn     ${RELOCATING-0} :
 453     {
 454 EOF
 455 sed -e '/^[      ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rel\./d;/__rel_iplt_/d;s/^.*: { *\(.*\)}/      \1/' $COMBRELOC >> ldscripts/dyntmp.$$
 456 cat >> ldscripts/dyntmp.$$ <<EOF
 457     }
 458 EOF
 459 fi
 460
 461 cat >> ldscripts/dyntmp.$$ <<EOF
 462   .rel.plt      ${RELOCATING-0} :
 463     {
 464       *(.rel.plt)
 465       ${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_start = .);}}}
 466       ${IREL_IN_PLT+${RELOCATING+*(.rel.iplt)}}
 467       ${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_end = .);}}}
 468     }
 469   .rela.plt     ${RELOCATING-0} :
 470     {
 471       *(.rela.plt)
 472       ${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_start = .);}}}
 473       ${IREL_IN_PLT+${RELOCATING+*(.rela.iplt)}}
 474       ${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_end = .);}}}
 475     }
 476   ${OTHER_PLT_RELOC_SECTIONS}
 477 EOF
 478
 479 emit_dyn()
 480 {
 481   if test -z "${NO_REL_RELOCS}${NO_RELA_RELOCS}"; then
 482     cat ldscripts/dyntmp.$$
 483   else
 484     if test -z "${NO_REL_RELOCS}"; then
 485       sed -e '/^[        ]*\.rela\.[^}]*$/,/}/d;/^[      ]*\.rela\./d;/__rela_iplt_/d' ldscripts/dyntmp.$$
 486     fi
 487     if test -z "${NO_RELA_RELOCS}"; then
 488       sed -e '/^[        ]*\.rel\.[^}]*$/,/}/d;/^[       ]*\.rel\./d;/__rel_iplt_/d' ldscripts/dyntmp.$$
 489     fi
 490   fi
 491   rm -f ldscripts/dyntmp.$$
 492 }
 493
 494 test -n "${NON_ALLOC_DYN}${SEPARATE_CODE}" || emit_dyn
 495
 496 cat <<EOF
 497   ${RELOCATING+${TEXT_SEGMENT_ALIGN}}
 498
 499   .init         ${RELOCATING-0}${RELOCATING+${INIT_ADDR}} :
 500   {
 501     ${RELOCATING+${INIT_START}}
 502     KEEP (*(SORT_NONE(.init)))
 503     ${RELOCATING+${INIT_END}}
 504   } ${FILL}
 505
 506   ${TEXT_PLT+${PLT_NEXT_DATA-${PLT} ${OTHER_PLT_SECTIONS}}}
 507   ${TINY_READONLY_SECTION}
 508   .text         ${RELOCATING-0} :
 509   {
 510     ${RELOCATING+${TEXT_START_SYMBOLS}}
 511     ${RELOCATING+*(.text.unlikely .text.*_unlikely .text.unlikely.*)}
 512     ${RELOCATING+*(.text.exit .text.exit.*)}
 513     ${RELOCATING+*(.text.startup .text.startup.*)}
 514     ${RELOCATING+*(.text.hot .text.hot.*)}
 515     ${RELOCATING+*(SORT(.text.sorted.*))}
 516     *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
 517     /* .gnu.warning sections are handled specially by elf.em.  */
 518     *(.gnu.warning)
 519     ${RELOCATING+${OTHER_TEXT_SECTIONS}}
 520   } ${FILL}
 521   .fini         ${RELOCATING-0}${RELOCATING+${FINI_ADDR}} :
 522   {
 523     ${RELOCATING+${FINI_START}}
 524     KEEP (*(SORT_NONE(.fini)))
 525     ${RELOCATING+${FINI_END}}
 526   } ${FILL}
 527   ${RELOCATING+PROVIDE (__${ETEXT_NAME} = .);}
 528   ${RELOCATING+PROVIDE (_${ETEXT_NAME} = .);}
 529   ${RELOCATING+PROVIDE (${ETEXT_NAME} = .);}
 530   ${RELOCATING+${TEXT_SEGMENT_ALIGN}}
 531 EOF
 532
 533 if test -n "${SEPARATE_CODE}${SEPARATE_TEXT}"; then
 534   if test -n "${RODATA_ADDR}"; then
 535     RODATA_ADDR="\
 536 SEGMENT_START(\"rodata-segment\", ${RODATA_ADDR}) + SIZEOF_HEADERS"
 537   else
 538     RODATA_ADDR="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
 539     RODATA_ADDR="SEGMENT_START(\"rodata-segment\", ${RODATA_ADDR})"
 540   fi
 541   if test -n "${SHLIB_RODATA_ADDR}"; then
 542     SHLIB_RODATA_ADDR="\
 543 SEGMENT_START(\"rodata-segment\", ${SHLIB_RODATA_ADDR}) + SIZEOF_HEADERS"
 544   else
 545     SHLIB_RODATA_ADDR="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
 546     SHLIB_RODATA_ADDR="SEGMENT_START(\"rodata-segment\", ${SHLIB_RODATA_ADDR})"
 547   fi
 548   cat <<EOF
 549   ${RELOCATING+/* Adjust the address for the rodata segment.  We want to adjust up to
 550      the same address within the page on the next page up.  */
 551   ${CREATE_SHLIB-${CREATE_PIE-. = ${RODATA_ADDR};}}
 552   ${CREATE_SHLIB+. = ${SHLIB_RODATA_ADDR};}
 553   ${CREATE_PIE+. = ${SHLIB_RODATA_ADDR};}}
 554 EOF
 555   if test -n "${SEPARATE_CODE}"; then
 556     emit_early_ro
 557     emit_dyn
 558   fi
 559 fi
 560
 561 cat <<EOF
 562   ${WRITABLE_RODATA-${RODATA}}
 563   .${RODATA_NAME}1      ${RELOCATING-0} : { *(.${RODATA_NAME}1) }
 564   ${CREATE_SHLIB-${SDATA2}}
 565   ${CREATE_SHLIB-${SBSS2}}
 566   ${OTHER_READONLY_SECTIONS}
 567   .eh_frame_hdr ${RELOCATING-0} : { *(.eh_frame_hdr)${RELOCATING+ *(.eh_frame_entry .eh_frame_entry.*)} }
 568   .eh_frame     ${RELOCATING-0} : ONLY_IF_RO { KEEP (*(.eh_frame))${RELOCATING+ *(.eh_frame.*)} }
 569   .gcc_except_table ${RELOCATING-0} : ONLY_IF_RO { *(.gcc_except_table${RELOCATING+ .gcc_except_table.*}) }
 570   .gnu_extab ${RELOCATING-0} : ONLY_IF_RO { *(.gnu_extab*) }
 571   /* These sections are generated by the Sun/Oracle C++ compiler.  */
 572   .exception_ranges ${RELOCATING-0} : ONLY_IF_RO { *(.exception_ranges${RELOCATING+*}) }
 573   ${TEXT_PLT+${PLT_NEXT_DATA+${PLT} ${OTHER_PLT_SECTIONS}}}
 574
 575   ${RELOCATING+/* Adjust the address for the data segment.  We want to adjust up to
 576      the same address within the page on the next page up.  */}
 577   ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}}
 578   ${CREATE_SHLIB+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}
 579   ${CREATE_PIE+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}
 580
 581   /* Exception handling  */
 582   .eh_frame     ${RELOCATING-0} : ONLY_IF_RW { KEEP (*(.eh_frame))${RELOCATING+ *(.eh_frame.*)} }
 583   .gnu_extab    ${RELOCATING-0} : ONLY_IF_RW { *(.gnu_extab) }
 584   .gcc_except_table ${RELOCATING-0} : ONLY_IF_RW { *(.gcc_except_table${RELOCATING+ .gcc_except_table.*}) }
 585   .exception_ranges ${RELOCATING-0} : ONLY_IF_RW { *(.exception_ranges${RELOCATING+*}) }
 586
 587   /* Thread Local Storage sections  */
 588   .tdata        ${RELOCATING-0} :
 589    {
 590      ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__tdata_start = .);}}
 591      *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*})
 592    }
 593   .tbss         ${RELOCATING-0} : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} }
 594
 595   ${RELOCATING+${PREINIT_ARRAY}}
 596   ${RELOCATING+${INIT_ARRAY}}
 597   ${RELOCATING+${FINI_ARRAY}}
 598   ${SMALL_DATA_CTOR-${RELOCATING+${CTOR}}}
 599   ${SMALL_DATA_DTOR-${RELOCATING+${DTOR}}}
 600   .jcr          ${RELOCATING-0} : { KEEP (*(.jcr)) }
 601
 602   ${RELOCATING+${DATARELRO}}
 603   ${OTHER_RELRO_SECTIONS}
 604   ${TEXT_DYNAMIC-${DYNAMIC}}
 605   ${OTHER_RELRO_SECTIONS_2}
 606   ${DATA_GOT+${RELRO_NOW+${DATA_PLT+${PLT_BEFORE_GOT+${PLT}}}}}
 607   ${DATA_GOT+${RELRO_NOW+${GOT}}}
 608   ${DATA_GOT+${RELRO_NOW+${GOTPLT}}}
 609   ${DATA_GOT+${RELRO_NOW-${SEPARATE_GOTPLT+${GOT}}}}
 610   ${RELOCATING+${DATA_SEGMENT_RELRO_END}}
 611   ${INITIAL_READWRITE_SECTIONS}
 612   ${DATA_SDATA+${SDATA}}
 613   ${DATA_SDATA+${OTHER_SDATA_SECTIONS}}
 614   ${DATA_SDATA+${SBSS}}
 615   ${DATA_GOT+${RELRO_NOW-${DATA_PLT+${PLT_BEFORE_GOT+${PLT}}}}}
 616   ${DATA_GOT+${RELRO_NOW-${SEPARATE_GOTPLT-${GOT}}}}
 617   ${DATA_GOT+${RELRO_NOW-${GOTPLT}}}
 618
 619   ${DATA_PLT+${PLT_BEFORE_GOT-${PLT}}}
 620
 621   .data         ${RELOCATING-0} :
 622   {
 623     ${RELOCATING+${DATA_START_SYMBOLS}}
 624     *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
 625     ${CONSTRUCTING+SORT(CONSTRUCTORS)}
 626   }
 627   .data1        ${RELOCATING-0} : { *(.data1) }
 628   ${WRITABLE_RODATA+${RODATA}}
 629   ${OTHER_READWRITE_SECTIONS}
 630   ${SMALL_DATA_CTOR+${RELOCATING+${CTOR}}}
 631   ${SMALL_DATA_DTOR+${RELOCATING+${DTOR}}}
 632   ${SDATA_GOT+${DATA_PLT+${PLT_BEFORE_GOT+${PLT}}}}
 633   ${SDATA_GOT+${RELOCATING+${OTHER_GOT_SYMBOLS+. = .; ${OTHER_GOT_SYMBOLS}}}}
 634   ${SDATA_GOT+${GOT}}
 635   ${SDATA_GOT+${OTHER_GOT_SECTIONS}}
 636   ${DATA_SDATA-${SDATA}}
 637   ${DATA_SDATA-${OTHER_SDATA_SECTIONS}}
 638   ${RELOCATING+${DATA_END_SYMBOLS-${CREATE_SHLIB+PROVIDE (}${USER_LABEL_PREFIX}_edata = .${CREATE_SHLIB+)}; PROVIDE (${USER_LABEL_PREFIX}edata = .);}}
 639   ${RELOCATING+. = .;}
 640   ${RELOCATING+${CREATE_SHLIB+PROVIDE (}${USER_LABEL_PREFIX}__bss_start = .${CREATE_SHLIB+)};}
 641   ${RELOCATING+${OTHER_BSS_SYMBOLS}}
 642   ${DATA_SDATA-${SBSS}}
 643   ${BSS_PLT+${PLT}}
 644   .${BSS_NAME}          ${RELOCATING-0} :
 645   {
 646    ${RELOCATING+*(.dynbss)}
 647    *(.${BSS_NAME}${RELOCATING+ .${BSS_NAME}.* .gnu.linkonce.b.*})
 648    ${RELOCATING+*(COMMON)
 649    /* Align here to ensure that the .bss section occupies space up to
 650       _end.  Align after .bss to ensure correct alignment even if the
 651       .bss section disappears because there are no input sections.
 652       FIXME: Why do we need it? When there is no .bss section, we do not
 653       pad the .data section.  */
 654    . = ALIGN(. != 0 ? ${ALIGNMENT} : 1);}
 655   }
 656   ${OTHER_BSS_SECTIONS}
 657   ${LARGE_BSS_AFTER_BSS+${LARGE_BSS}}
 658   ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
 659   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 660 EOF
 661
 662 LARGE_DATA_ADDR=". = SEGMENT_START(\"ldata-segment\", ${LARGE_DATA_ADDR-.});"
 663 SHLIB_LARGE_DATA_ADDR=". = SEGMENT_START(\"ldata-segment\", ${SHLIB_LARGE_DATA_ADDR-.});"
 664
 665 cat <<EOF
 666   ${RELOCATING+${CREATE_SHLIB-${CREATE_PIE-${LARGE_DATA_ADDR}}}}
 667   ${CREATE_SHLIB+${SHLIB_LARGE_DATA_ADDR}}
 668   ${CREATE_PIE+${SHLIB_LARGE_DATA_ADDR}}
 669   ${LARGE_SECTIONS}
 670   ${LARGE_BSS_AFTER_BSS-${LARGE_BSS}}
 671   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 672   ${RELOCATING+${OTHER_END_SYMBOLS}}
 673   ${RELOCATING+${END_SYMBOLS-${CREATE_SHLIB+PROVIDE (}${USER_LABEL_PREFIX}_end = .${CREATE_SHLIB+)}; PROVIDE (${USER_LABEL_PREFIX}end = .);}}
 674   ${RELOCATING+${DATA_SEGMENT_END}}
 675   ${TINY_DATA_SECTION}
 676   ${TINY_BSS_SECTION}
 677   ${STACK_ADDR+${STACK}}
 678 EOF
 679
 680 test -z "${NON_ALLOC_DYN}" || emit_dyn
 681
 682 source_sh $srcdir/scripttempl/misc-sections.sc
 683
 684 cat <<EOF
 685   ${ATTRS_SECTIONS}
 686   ${OTHER_SECTIONS}
 687   ${RELOCATING+${OTHER_SYMBOLS}}
 688   ${RELOCATING+${DISCARDED}}
 689 }
 690 EOF