ld/scripttempl/elfarcv2.sc

   1 #
   2 # Unusual variables checked by this code:
   3 #       NOP - four byte opcode for no-op (defaults to 0)
   4 #       NO_SMALL_DATA - no .sbss/.sbss2/.sdata/.sdata2 sections if not
   5 #               empty.
   6 #       OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
   7 #               (e.g., .PARISC.milli)
   8 # When adding sections, do note that the names of some sections are used
   9 # when specifying the start address of the next.
  10 #
  11 test -z "$ENTRY" && ENTRY=start
  12 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  13 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  14 # If we request a big endian toolchain, give a big endian linker
  15 test -z "$GOT" && GOT=".got          ${RELOCATING-0} : { *(.got.plt) *(.got) } ${RELOCATING+ > ${DATA_MEMORY}}"
  16 test "${ARC_ENDIAN}" == "big" && OUTPUT_FORMAT=${BIG_OUTPUT_FORMAT}
  17 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
  18 test -z "${ELFSIZE}" && ELFSIZE=32
  19 test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
  20 test "$LD_FLAG" = "N" && DATA_ADDR=.
  21
  22 CTOR=".ctors        ${CONSTRUCTING-0} :
  23   {
  24     ${CONSTRUCTING+${CTOR_START}}
  25     /* gcc uses crtbegin.o to find the start of
  26        the constructors, so we make sure it is
  27        first.  Because this is a wildcard, it
  28        doesn't matter if the user does not
  29        actually link against crtbegin.o; the
  30        linker won't look for a file to match a
  31        wildcard.  The wildcard also means that it
  32        doesn't matter which directory crtbegin.o
  33        is in.  */
  34
  35     KEEP (*crtbegin*.o(.ctors))
  36
  37     /* We don't want to include the .ctor section from
  38        from the crtend.o file until after the sorted ctors.
  39        The .ctor section from the crtend file contains the
  40        end of ctors marker and it must be last */
  41
  42     KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .ctors))
  43     KEEP (*(SORT(.ctors.*)))
  44     KEEP (*(.ctors))
  45     ${CONSTRUCTING+${CTOR_END}}
  46   } ${RELOCATING+ > ${DATA_MEMORY}}"
  47 DTOR=".dtors        ${CONSTRUCTING-0} :
  48   {
  49     ${CONSTRUCTING+${DTOR_START}}
  50     KEEP (*crtbegin*.o(.dtors))
  51     KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .dtors))
  52     KEEP (*(SORT(.dtors.*)))
  53     KEEP (*(.dtors))
  54     ${CONSTRUCTING+${DTOR_END}}
  55   } ${RELOCATING+ > ${DATA_MEMORY}}"
  56
  57 if test -z "${NO_SMALL_DATA}"; then
  58   SBSS=".sbss         ${RELOCATING-0} :
  59   {
  60     ${RELOCATING+PROVIDE (__sbss_start = .);}
  61     ${RELOCATING+PROVIDE (___sbss_start = .);}
  62     *(.dynsbss)
  63     *(.sbss${RELOCATING+ .sbss.* .gnu.linkonce.sb.*})
  64     *(.scommon)
  65     ${RELOCATING+PROVIDE (__sbss_end = .);}
  66     ${RELOCATING+PROVIDE (___sbss_end = .);}
  67   } ${RELOCATING+ > ${SDATA_MEMORY}}"
  68   SBSS2=".sbss2        ${RELOCATING-0} : { *(.sbss2${RELOCATING+ .sbss2.* .gnu.linkonce.sb2.*}) } ${RELOCATING+ > ${SDATA_MEMORY}}"
  69   SDATA="/* We want the small data sections together, so single-instruction offsets
  70      can access them all, and initialized data all before uninitialized, so
  71      we can shorten the on-disk segment size.  */
  72   .sdata        ${RELOCATING-0} :
  73   {
  74     ${RELOCATING+${SDATA_START_SYMBOLS}}
  75     *(.sdata${RELOCATING+ .sdata.* .gnu.linkonce.s.*})
  76
  77     ${RELOCATING+_edata  =  .;}
  78     ${RELOCATING+PROVIDE (edata = .);}
  79   } ${RELOCATING+ > ${SDATA_MEMORY}}"
  80   SDATA2=".sdata2       ${RELOCATING-0} : { *(.sdata2${RELOCATING+ .sdata2.* .gnu.linkonce.s2.*}) } ${RELOCATING+ > ${SDATA_MEMORY}}"
  81   REL_SDATA=".rel.sdata    ${RELOCATING-0} : { *(.rel.sdata${RELOCATING+ .rel.sdata.* .rel.gnu.linkonce.s.*}) }
  82   .rela.sdata   ${RELOCATING-0} : { *(.rela.sdata${RELOCATING+ .rela.sdata.* .rela.gnu.linkonce.s.*}) }"
  83   REL_SBSS=".rel.sbss     ${RELOCATING-0} : { *(.rel.sbss${RELOCATING+ .rel.sbss.* .rel.gnu.linkonce.sb.*}) }
  84   .rela.sbss    ${RELOCATING-0} : { *(.rela.sbss${RELOCATING+ .rela.sbss.* .rela.gnu.linkonce.sb.*}) }"
  85   REL_SDATA2=".rel.sdata2   ${RELOCATING-0} : { *(.rel.sdata2${RELOCATING+ .rel.sdata2.* .rel.gnu.linkonce.s2.*}) }
  86   .rela.sdata2  ${RELOCATING-0} : { *(.rela.sdata2${RELOCATING+ .rela.sdata2.* .rela.gnu.linkonce.s2.*}) }"
  87   REL_SBSS2=".rel.sbss2    ${RELOCATING-0} : { *(.rel.sbss2${RELOCATING+ .rel.sbss2.* .rel.gnu.linkonce.sb2.*}) }
  88   .rela.sbss2   ${RELOCATING-0} : { *(.rela.sbss2${RELOCATING+ .rela.sbss2.* .rela.gnu.linkonce.sb2.*}) }"
  89 fi
  90
  91 #
  92 # We provide two emulations: a fixed on that defines some memory banks
  93 # and a configurable one that includes a user provided memory definition.
  94 #
  95 case $GENERIC_BOARD in
  96   yes|1|YES)
  97         MEMORY_DEF="
  98 /* Get memory banks definition from some user configuration file.
  99    This file must be located in some linker directory (search path
 100    with -L<dir>). See fixed memory banks emulation script.  */
 101 INCLUDE memory.x;
 102 "
 103         ;;
 104   *)
 105 MEMORY_DEF="
 106 /* Fixed definition of the available memory banks.
 107    See generic emulation script for a user defined configuration.  */
 108 MEMORY
 109 {
 110     ICCM : ORIGIN = 0x00000000, LENGTH = ${ICCM_SIZE}
 111     DCCM : ORIGIN = ${RAM_START_ADDR}, LENGTH = ${RAM_SIZE}
 112 }
 113
 114 /* Setup the stack on the top of the data memory bank.  */
 115 PROVIDE (__stack_top = (${RAM_START_ADDR} + ${RAM_SIZE} - 1) & -4);
 116 PROVIDE (__end_heap = ${RAM_START_ADDR} + ${RAM_SIZE} - 1);
 117 "
 118         ;;
 119 esac
 120
 121 cat <<EOF
 122 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}", "${LITTLE_OUTPUT_FORMAT}")
 123 OUTPUT_ARCH(${OUTPUT_ARCH})
 124 ${RELOCATING+ENTRY(${ENTRY})}
 125
 126 ${RELOCATING+${LIB_SEARCH_DIRS}}
 127 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
 128 ${RELOCATING+${MEMORY_DEF}}
 129
 130 SECTIONS
 131 {
 132   .ivt 0x00 :
 133   {
 134    KEEP (*(.ivt));
 135   } ${RELOCATING+ > ${STARTUP_MEMORY}}
 136
 137   .startup 0x100:
 138   {
 139     KEEP (*crt0.o(.text.__startup))
 140   } ${RELOCATING+ > ${STARTUP_MEMORY}}
 141
 142   /* Read-only sections, merged into text segment: */
 143   ${TEXT_DYNAMIC+${DYNAMIC}}
 144   .hash        ${RELOCATING-0} : { *(.hash)             }
 145   .dynsym      ${RELOCATING-0} : { *(.dynsym)           }
 146   .dynstr      ${RELOCATING-0} : { *(.dynstr)           }
 147   .gnu.version ${RELOCATING-0} : { *(.gnu.version)      }
 148   .gnu.version_d ${RELOCATING-0} : { *(.gnu.version_d)  }
 149   .gnu.version_r ${RELOCATING-0} : { *(.gnu.version_r)  }
 150
 151   .rel.init     ${RELOCATING-0} : { *(.rel.init) }
 152   .rela.init    ${RELOCATING-0} : { *(.rela.init) }
 153   .rel.text     ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
 154   .rela.text    ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
 155   .rel.fini     ${RELOCATING-0} : { *(.rel.fini) }
 156   .rela.fini    ${RELOCATING-0} : { *(.rela.fini) }
 157   .rel.rodata   ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
 158   .rela.rodata  ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
 159   .rel.data     ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
 160   .rela.data    ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
 161   .rel.tdata    ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
 162   .rela.tdata   ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
 163   .rel.tbss     ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
 164   .rela.tbss    ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
 165   .rel.ctors    ${RELOCATING-0} : { *(.rel.ctors) }
 166   .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors) }
 167   .rel.dtors    ${RELOCATING-0} : { *(.rel.dtors) }
 168   .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors) }
 169   .rel.got      ${RELOCATING-0} : { *(.rel.got) }
 170   .rela.got     ${RELOCATING-0} : { *(.rela.got) }
 171   ${REL_SDATA}
 172   ${REL_SBSS}
 173   ${REL_SDATA2}
 174   ${REL_SBSS2}
 175   .rel.bss      ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
 176   .rela.bss     ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
 177
 178   .jcr : { KEEP (*(.jcr)) } ${RELOCATING+> ${TEXT_MEMORY}}
 179   .eh_frame : { KEEP (*(.eh_frame)) } ${RELOCATING+> ${TEXT_MEMORY}}
 180   .gcc_except_table : { *(.gcc_except_table) *(.gcc_except_table.*) } ${RELOCATING+> ${TEXT_MEMORY}}
 181   .plt : { *(.plt) } ${RELOCATING+> ${TEXT_MEMORY}}
 182   .jlitab :
 183   {
 184     ${RELOCATING+${JLI_START_TABLE}}
 185      jlitab*.o:(.jlitab*) *(.jlitab*)
 186   } ${RELOCATING+> ${TEXT_MEMORY}}
 187
 188   .rodata ${RELOCATING-0} :
 189   {
 190     *(.rodata) ${RELOCATING+*(.rodata.*)} ${RELOCATING+*(.gnu.linkonce.r.*)}
 191   } ${RELOCATING+> ${TEXT_MEMORY}}
 192
 193   .rodata1      ${RELOCATING-0} : { *(.rodata1) } ${RELOCATING+> ${TEXT_MEMORY}}
 194
 195   .init         ${RELOCATING-0} :
 196   {
 197     ${RELOCATING+${INIT_START}}
 198     KEEP (*(.init))
 199     ${RELOCATING+${INIT_END}}
 200   } ${RELOCATING+ > ${TEXT_MEMORY}}  =${NOP-0}
 201
 202   .text         ${RELOCATING-0} :
 203   {
 204     ${RELOCATING+${TEXT_START_SYMBOLS}}
 205
 206     *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
 207     /* .gnu.warning sections are handled specially by elf32.em.  */
 208     *(.gnu.warning)
 209
 210     ${RELOCATING+${OTHER_TEXT_SECTIONS}}
 211
 212   } ${RELOCATING+ > ${TEXT_MEMORY}} =${NOP-0}
 213
 214   .fini         ${RELOCATING-0} :
 215   {
 216     ${RELOCATING+${FINI_START}}
 217     KEEP (*(.fini))
 218     ${RELOCATING+${FINI_END}}
 219
 220     ${RELOCATING+PROVIDE (__etext = .);}
 221     ${RELOCATING+PROVIDE (_etext = .);}
 222     ${RELOCATING+PROVIDE (etext = .);}
 223   } ${RELOCATING+ > ${TEXT_MEMORY}} =${NOP-0}
 224
 225   ${RELOCATING+${OTHER_READONLY_SECTIONS}}
 226
 227   /* Start of the data section image in ROM.  */
 228   ${RELOCATING+__data_image = .;}
 229   ${RELOCATING+PROVIDE (__data_image = .);}
 230
 231   .data ${RELOCATING-0} :
 232   {
 233     ${RELOCATING+ PROVIDE (__data_start = .) ; }
 234     /* --gc-sections will delete empty .data. This leads to wrong start
 235        addresses for subsequent sections because -Tdata= from the command
 236        line will have no effect, see PR13697.  Thus, keep .data  */
 237     KEEP (*(.data))
 238     ${RELOCATING+${DATA_START_SYMBOLS}}
 239     *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
 240     ${CONSTRUCTING+SORT(CONSTRUCTORS)}
 241
 242   } ${RELOCATING+ > ${DATA_MEMORY}}
 243
 244   ${GOT}
 245   ${RELOCATING+${CTOR}}
 246   ${RELOCATING+${DTOR}}
 247
 248   ${RELOCATING+${SDATA}}
 249   ${RELOCATING+${SDATA2}}
 250   ${RELOCATING+${SBSS}}
 251   ${RELOCATING+${SBSS2}}
 252   .bss          ${RELOCATING-0} :
 253   {
 254    *(.dynbss)
 255    *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
 256    *(COMMON)
 257    /* Align here to ensure that the .bss section occupies space up to
 258       _end.  Align after .bss to ensure correct alignment even if the
 259       .bss section disappears because there are no input sections.  */
 260    ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 261    ${RELOCATING+_end = .;}
 262    ${RELOCATING+PROVIDE (end = .);}
 263   } ${RELOCATING+ > ${DATA_MEMORY}}
 264
 265   /* Global data not cleared after reset.  */
 266   .noinit ${RELOCATING-0}:
 267   {
 268     *(.noinit*)
 269     ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 270     ${RELOCATING+ PROVIDE (__start_heap = .) ; }
 271   } ${RELOCATING+ > ${DATA_MEMORY}}
 272
 273
 274   /* Stabs debugging sections.  */
 275   .stab          0 : { *(.stab) }
 276   .stabstr       0 : { *(.stabstr) }
 277   .stab.excl     0 : { *(.stab.excl) }
 278   .stab.exclstr  0 : { *(.stab.exclstr) }
 279   .stab.index    0 : { *(.stab.index) }
 280   .stab.indexstr 0 : { *(.stab.indexstr) }
 281
 282   .comment       0 : { *(.comment) }
 283
 284   /* DWARF debug sections.
 285      Symbols in the DWARF debugging sections are relative to the beginning
 286      of the section so we begin them at 0.  */
 287
 288   /* DWARF 1 */
 289   .debug          0 : { *(.debug) }
 290   .line           0 : { *(.line) }
 291
 292   /* GNU DWARF 1 extensions */
 293   .debug_srcinfo  0 : { *(.debug_srcinfo) }
 294   .debug_sfnames  0 : { *(.debug_sfnames) }
 295
 296   /* DWARF 1.1 and DWARF 2 */
 297   .debug_aranges  0 : { *(.debug_aranges) }
 298   .debug_pubnames 0 : { *(.debug_pubnames) }
 299
 300   /* DWARF 2 */
 301   .debug_info     0 : { *(.debug_info) *(.gnu.linkonce.wi.*) }
 302   .debug_abbrev   0 : { *(.debug_abbrev) }
 303   .debug_line     0 : { *(.debug_line) }
 304   .debug_frame    0 : { *(.debug_frame) }
 305   .debug_str      0 : { *(.debug_str) }
 306   .debug_loc      0 : { *(.debug_loc) }
 307   .debug_macinfo  0 : { *(.debug_macinfo) }
 308
 309   /* DWARF 3 */
 310   .debug_pubtypes 0 : { *(.debug_pubtypes) }
 311   .debug_ranges   0 : { *(.debug_ranges) }
 312
 313   /* DWARF Extension.  */
 314   .debug_macro    0 : { *(.debug_macro) }
 315
 316   /* ARC Extension Sections */
 317   .arcextmap      0 : { *(.gnu.linkonce.arcextmap.*) }
 318 }
 319 EOF