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          ${RELOCATING-0} : {${RELOCATING+ *(.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 IVT="
  58  /* If the 'ivtbase_addr' symbol is defined, it indicates  the base address of
  59     the interrupt vectors.  See description of INT_VECTOR_BASE register.  */
  60
  61  .ivt DEFINED (ivtbase_addr) ? ivtbase_addr : 0x00 :
  62  {
  63    ${RELOCATING+ PROVIDE (__ivtbase_addr = .); }
  64    KEEP (*(.ivt));
  65  } ${RELOCATING+ > ${STARTUP_MEMORY}}"
  66
  67 if test -z "${NO_SMALL_DATA}"; then
  68   SBSS=".sbss         ${RELOCATING-0} :
  69   {
  70     ${RELOCATING+PROVIDE (__sbss_start = .);}
  71     ${RELOCATING+PROVIDE (___sbss_start = .);}
  72     *(.dynsbss)
  73     *(.sbss${RELOCATING+ .sbss.* .gnu.linkonce.sb.*})
  74     *(.scommon)
  75     ${RELOCATING+PROVIDE (__sbss_end = .);}
  76     ${RELOCATING+PROVIDE (___sbss_end = .);}
  77   } ${RELOCATING+ > ${SDATA_MEMORY}}"
  78   SBSS2=".sbss2        ${RELOCATING-0} : { *(.sbss2${RELOCATING+ .sbss2.* .gnu.linkonce.sb2.*}) } ${RELOCATING+ > ${SDATA_MEMORY}}"
  79   SDATA="/* We want the small data sections together, so single-instruction offsets
  80      can access them all, and initialized data all before uninitialized, so
  81      we can shorten the on-disk segment size.  */
  82   .sdata        ${RELOCATING-0} :
  83   {
  84     ${RELOCATING+${SDATA_START_SYMBOLS}}
  85     *(.sdata${RELOCATING+ .sdata.* .gnu.linkonce.s.*})
  86
  87     ${RELOCATING+_edata  =  .;}
  88     ${RELOCATING+PROVIDE (edata = .);}
  89   } ${RELOCATING+ > ${SDATA_MEMORY}}"
  90   SDATA2=".sdata2       ${RELOCATING-0} : { *(.sdata2${RELOCATING+ .sdata2.* .gnu.linkonce.s2.*}) } ${RELOCATING+ > ${SDATA_MEMORY}}"
  91   REL_SDATA=".rel.sdata    ${RELOCATING-0} : { *(.rel.sdata${RELOCATING+ .rel.sdata.* .rel.gnu.linkonce.s.*}) }
  92   .rela.sdata   ${RELOCATING-0} : { *(.rela.sdata${RELOCATING+ .rela.sdata.* .rela.gnu.linkonce.s.*}) }"
  93   REL_SBSS=".rel.sbss     ${RELOCATING-0} : { *(.rel.sbss${RELOCATING+ .rel.sbss.* .rel.gnu.linkonce.sb.*}) }
  94   .rela.sbss    ${RELOCATING-0} : { *(.rela.sbss${RELOCATING+ .rela.sbss.* .rela.gnu.linkonce.sb.*}) }"
  95   REL_SDATA2=".rel.sdata2   ${RELOCATING-0} : { *(.rel.sdata2${RELOCATING+ .rel.sdata2.* .rel.gnu.linkonce.s2.*}) }
  96   .rela.sdata2  ${RELOCATING-0} : { *(.rela.sdata2${RELOCATING+ .rela.sdata2.* .rela.gnu.linkonce.s2.*}) }"
  97   REL_SBSS2=".rel.sbss2    ${RELOCATING-0} : { *(.rel.sbss2${RELOCATING+ .rel.sbss2.* .rel.gnu.linkonce.sb2.*}) }
  98   .rela.sbss2   ${RELOCATING-0} : { *(.rela.sbss2${RELOCATING+ .rela.sbss2.* .rela.gnu.linkonce.sb2.*}) }"
  99 fi
 100
 101 #
 102 # We provide two emulations: a fixed on that defines some memory banks
 103 # and a configurable one that includes a user provided memory definition.
 104 #
 105 case $GENERIC_BOARD in
 106   yes|1|YES)
 107         MEMORY_DEF="
 108 /* Get memory banks definition from some user configuration file.
 109    This file must be located in some linker directory (search path
 110    with -L<dir>). See fixed memory banks emulation script.  */
 111 INCLUDE memory.x;
 112 "
 113         ;;
 114   *)
 115 MEMORY_DEF="
 116 /* Fixed definition of the available memory banks.
 117    See generic emulation script for a user defined configuration.  */
 118 MEMORY
 119 {
 120     ICCM : ORIGIN = 0x00000000, LENGTH = ${ICCM_SIZE}
 121     DCCM : ORIGIN = ${RAM_START_ADDR}, LENGTH = ${RAM_SIZE}
 122 }
 123 "
 124         ;;
 125 esac
 126
 127 cat <<EOF
 128 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}", "${LITTLE_OUTPUT_FORMAT}")
 129 OUTPUT_ARCH(${OUTPUT_ARCH})
 130 ${RELOCATING+ENTRY(${ENTRY})}
 131
 132 ${RELOCATING+${LIB_SEARCH_DIRS}}
 133 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
 134 ${RELOCATING+${MEMORY_DEF}}
 135
 136 SECTIONS
 137 {
 138   ${RELOCATING+${IVT}}
 139
 140   /* Read-only sections, merged into text segment: */
 141   ${TEXT_DYNAMIC+${DYNAMIC}}
 142   .hash        ${RELOCATING-0} : { *(.hash)             }
 143   .dynsym      ${RELOCATING-0} : { *(.dynsym)           }
 144   .dynstr      ${RELOCATING-0} : { *(.dynstr)           }
 145   .gnu.version ${RELOCATING-0} : { *(.gnu.version)      }
 146   .gnu.version_d ${RELOCATING-0} : { *(.gnu.version_d)  }
 147   .gnu.version_r ${RELOCATING-0} : { *(.gnu.version_r)  }
 148
 149   .rel.init     ${RELOCATING-0} : { *(.rel.init) }
 150   .rela.init    ${RELOCATING-0} : { *(.rela.init) }
 151   .rel.text     ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
 152   .rela.text    ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
 153   .rel.fini     ${RELOCATING-0} : { *(.rel.fini) }
 154   .rela.fini    ${RELOCATING-0} : { *(.rela.fini) }
 155   .rel.rodata   ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
 156   .rela.rodata  ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
 157   .rel.data     ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
 158   .rela.data    ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
 159   .rel.tdata    ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
 160   .rela.tdata   ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
 161   .rel.tbss     ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
 162   .rela.tbss    ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
 163   .rel.ctors    ${RELOCATING-0} : { *(.rel.ctors) }
 164   .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors) }
 165   .rel.dtors    ${RELOCATING-0} : { *(.rel.dtors) }
 166   .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors) }
 167   .rel.got      ${RELOCATING-0} : { *(.rel.got) }
 168   .rela.got     ${RELOCATING-0} : { *(.rela.got) }
 169   ${REL_SDATA}
 170   ${REL_SBSS}
 171   ${REL_SDATA2}
 172   ${REL_SBSS2}
 173   .rel.bss      ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
 174   .rela.bss     ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
 175
 176   .text         ${RELOCATING-0} :
 177   {
 178     ${RELOCATING+${TEXT_START_SYMBOLS}}
 179
 180     ${RELOCATING+ . = ALIGN(4);}
 181     ${RELOCATING+${INIT_START}}
 182     KEEP (*(SORT_NONE(.init)))
 183     ${RELOCATING+${INIT_END}}
 184
 185     /* Start here after reset.  */
 186     ${RELOCATING+ . = ALIGN(4);}
 187     KEEP (*crt0.o(.text.__startup))
 188
 189     /* Remaining code.  */
 190     ${RELOCATING+ . = ALIGN(4);}
 191     *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
 192     /* .gnu.warning sections are handled specially by elf.em.  */
 193     *(.gnu.warning)
 194
 195     ${RELOCATING+${OTHER_TEXT_SECTIONS}}
 196
 197   } ${RELOCATING+ > ${TEXT_MEMORY}} =${NOP-0}
 198
 199   .fini         ${RELOCATING-0} :
 200   {
 201     ${RELOCATING+${FINI_START}}
 202     KEEP (*(SORT_NONE(.fini)))
 203     ${RELOCATING+${FINI_END}}
 204
 205     ${RELOCATING+PROVIDE (__etext = .);}
 206     ${RELOCATING+PROVIDE (_etext = .);}
 207     ${RELOCATING+PROVIDE (etext = .);}
 208   } ${RELOCATING+ > ${TEXT_MEMORY}} =${NOP-0}
 209
 210   .jcr ${RELOCATING-0} :
 211   {
 212     KEEP (*(.jcr))
 213   } ${RELOCATING+> ${TEXT_MEMORY}}
 214
 215   .eh_frame ${RELOCATING-0} :
 216   {
 217     KEEP (*(.eh_frame))
 218   } ${RELOCATING+> ${TEXT_MEMORY}}
 219
 220   .gcc_except_table ${RELOCATING-0} :
 221   {
 222     *(.gcc_except_table) *(.gcc_except_table.*)
 223   } ${RELOCATING+> ${TEXT_MEMORY}}
 224
 225   .plt ${RELOCATING-0} :
 226   {
 227     *(.plt)
 228   } ${RELOCATING+> ${TEXT_MEMORY}}
 229
 230   .jlitab ${RELOCATING-0} :
 231   {
 232     ${RELOCATING+${JLI_START_TABLE}}
 233      jlitab*.o:(.jlitab*) *(.jlitab*)
 234   } ${RELOCATING+> ${TEXT_MEMORY}}
 235
 236   .rodata ${RELOCATING-0} :
 237   {
 238     *(.rodata) ${RELOCATING+*(.rodata.*)} ${RELOCATING+*(.gnu.linkonce.r.*)}
 239   } ${RELOCATING+> ${TEXT_MEMORY}}
 240
 241   .rodata1      ${RELOCATING-0} : { *(.rodata1) } ${RELOCATING+> ${TEXT_MEMORY}}
 242
 243   ${RELOCATING+${OTHER_READONLY_SECTIONS}}
 244
 245   /* Start of the data section image in ROM.  */
 246   ${RELOCATING+__data_image = .;}
 247   ${RELOCATING+PROVIDE (__data_image = .);}
 248
 249   .data ${RELOCATING-0} :
 250   {
 251     ${RELOCATING+ PROVIDE (__data_start = .) ; }
 252     /* --gc-sections will delete empty .data. This leads to wrong start
 253        addresses for subsequent sections because -Tdata= from the command
 254        line will have no effect, see PR13697.  Thus, keep .data  */
 255     KEEP (*(.data))
 256     ${RELOCATING+${DATA_START_SYMBOLS}}
 257     ${RELOCATING+*(.data.* .gnu.linkonce.d.*)}
 258     ${CONSTRUCTING+SORT(CONSTRUCTORS)}
 259
 260   } ${RELOCATING+ > ${DATA_MEMORY}}
 261
 262   ${GOT}
 263   ${RELOCATING+${CTOR}}
 264   ${RELOCATING+${DTOR}}
 265
 266   ${RELOCATING+${SDATA}}
 267   ${RELOCATING+${SDATA2}}
 268   ${RELOCATING+${SBSS}}
 269   ${RELOCATING+${SBSS2}}
 270   .bss          ${RELOCATING-0} :
 271   {
 272     ${RELOCATING+*(.dynbss)}
 273     *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
 274     ${RELOCATING+*(COMMON)
 275     /* Align here to ensure that the .bss section occupies space up to
 276        _end.  Align after .bss to ensure correct alignment even if the
 277        .bss section disappears because there are no input sections.  */
 278     . = ALIGN(${ALIGNMENT});}
 279    ${RELOCATING+_end = .;}
 280    ${RELOCATING+PROVIDE (end = .);}
 281   } ${RELOCATING+ > ${DATA_MEMORY}}
 282
 283   /* Global data not cleared after reset.  */
 284   .noinit ${RELOCATING-0}:
 285   {
 286     *(.noinit*)
 287     ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 288     ${RELOCATING+ PROVIDE (__start_heap = .) ; }
 289   } ${RELOCATING+ > ${DATA_MEMORY}}
 290
 291   ${RELOCATING+ PROVIDE (__stack_top = (ORIGIN (${DATA_MEMORY}) + LENGTH (${DATA_MEMORY}) - 1) & -4);}
 292   ${RELOCATING+ PROVIDE (__end_heap = ORIGIN (${DATA_MEMORY}) + LENGTH (${DATA_MEMORY}) - 1);}
 293
 294   /* Stabs debugging sections.  */
 295   .stab          0 : { *(.stab) }
 296   .stabstr       0 : { *(.stabstr) }
 297   .stab.excl     0 : { *(.stab.excl) }
 298   .stab.exclstr  0 : { *(.stab.exclstr) }
 299   .stab.index    0 : { *(.stab.index) }
 300   .stab.indexstr 0 : { *(.stab.indexstr) }
 301
 302   .comment       0 : { *(.comment) }
 303   .note.gnu.build-id : { *(.note.gnu.build-id) }
 304 EOF
 305
 306 . $srcdir/scripttempl/DWARF.sc
 307
 308 cat <<EOF
 309   /* ARC Extension Sections */
 310   .arcextmap      0 : { *(.arcextmap.*) }
 311 }
 312 EOF