ld/scripttempl/iq2000.sc

   1 #
   2 # Unusual variables checked by this code:
   3 #       NOP - four byte opcode for no-op (defaults to 0)
   4 #       DATA_ADDR - if end-of-text-plus-one-page isn't right for data start
   5 #       INITIAL_READONLY_SECTIONS - at start of data segment
   6 #       OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
   7 #               (e.g., .PARISC.milli)
   8 #       OTHER_TEXT_SECTIONS - these get put in .text when relocating
   9 #       OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
  10 #               (e.g., .PARISC.global)
  11 #       OTHER_SECTIONS - at the end
  12 #       EXECUTABLE_SYMBOLS - symbols that must be defined for an
  13 #               executable (e.g., _DYNAMIC_LINK)
  14 #       TEXT_START_SYMBOLS - symbols that appear at the start of the
  15 #               .text section.
  16 #       DATA_START_SYMBOLS - symbols that appear at the start of the
  17 #               .data section.
  18 #       OTHER_GOT_SYMBOLS - symbols defined just before .got.
  19 #       OTHER_GOT_SECTIONS - sections just after .got.
  20 #       OTHER_SDATA_SECTIONS - sections just after .sdata.
  21 #       OTHER_BSS_SYMBOLS - symbols that appear at the start of the
  22 #               .bss section besides __bss_start.
  23 #       DATA_PLT - .plt should be in data segment, not text segment.
  24 #       BSS_PLT - .plt should be in bss segment
  25 #       TEXT_DYNAMIC - .dynamic in text segment, not data segment.
  26 #       EMBEDDED - whether this is for an embedded system.
  27 #       SHLIB_TEXT_START_ADDR - if set, add to SIZEOF_HEADERS to set
  28 #               start address of shared library.
  29 #       INPUT_FILES - INPUT command of files to always include
  30 #       WRITABLE_RODATA - if set, the .rodata section should be writable
  31 #       INIT_START, INIT_END -  statements just before and just after
  32 #       combination of .init sections.
  33 #       FINI_START, FINI_END - statements just before and just after
  34 #       combination of .fini sections.
  35 #
  36 # When adding sections, do note that the names of some sections are used
  37 # when specifying the start address of the next.
  38 #
  39
  40 #  Many sections come in three flavours.  There is the 'real' section,
  41 #  like ".data".  Then there are the per-procedure or per-variable
  42 #  sections, generated by -ffunction-sections and -fdata-sections in GCC,
  43 #  and useful for --gc-sections, which for a variable "foo" might be
  44 #  ".data.foo".  Then there are the linkonce sections, for which the linker
  45 #  eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
  46 #  The exact correspondences are:
  47 #
  48 #  Section      Linkonce section
  49 #  .text        .gnu.linkonce.t.foo
  50 #  .rodata      .gnu.linkonce.r.foo
  51 #  .data        .gnu.linkonce.d.foo
  52 #  .bss         .gnu.linkonce.b.foo
  53 #  .sdata       .gnu.linkonce.s.foo
  54 #  .sbss        .gnu.linkonce.sb.foo
  55 #  .sdata2      .gnu.linkonce.s2.foo
  56 #  .sbss2       .gnu.linkonce.sb2.foo
  57 #
  58 #  Each of these can also have corresponding .rel.* and .rela.* sections.
  59
  60 test -z "$ENTRY" && ENTRY=_start
  61 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  62 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  63 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
  64 test -z "${ELFSIZE}" && ELFSIZE=32
  65 test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
  66 test "$LD_FLAG" = "N" && DATA_ADDR=.
  67 INTERP=".interp   ${RELOCATING-0} : { *(.interp)        }"
  68 PLT=".plt    ${RELOCATING-0} : { *(.plt)        }"
  69 DYNAMIC=".dynamic     ${RELOCATING-0} : { *(.dynamic) }"
  70 RODATA=".rodata ${RELOCATING-0} : { *(.rodata) ${RELOCATING+*(.rodata.*)} ${RELOCATING+*(.gnu.linkonce.r.*)} }"
  71 SBSS2=".sbss2 ${RELOCATING-0} : { *(.sbss2) ${RELOCATING+*(.sbss2.*)} ${RELOCATING+*(.gnu.linkonce.sb2.*)} }"
  72 SDATA2=".sdata2 ${RELOCATING-0} : { *(.sdata2) ${RELOCATING+*(.sdata2.*)} ${RELOCATING+*(.gnu.linkonce.s2.*)} }"
  73 CTOR=".ctors ${CONSTRUCTING-0} :
  74   {
  75     ${CONSTRUCTING+${CTOR_START}}
  76     /* gcc uses crtbegin.o to find the start of
  77        the constructors, so we make sure it is
  78        first.  Because this is a wildcard, it
  79        doesn't matter if the user does not
  80        actually link against crtbegin.o; the
  81        linker won't look for a file to match a
  82        wildcard.  The wildcard also means that it
  83        doesn't matter which directory crtbegin.o
  84        is in.  */
  85
  86     KEEP (*crtbegin.o(.ctors))
  87     KEEP (*crtbegin?.o(.ctors))
  88
  89     /* We don't want to include the .ctor section from
  90        the crtend.o file until after the sorted ctors.
  91        The .ctor section from the crtend file contains the
  92        end of ctors marker and it must be last */
  93
  94     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))
  95     KEEP (*(SORT(.ctors.*)))
  96     KEEP (*(.ctors))
  97     ${CONSTRUCTING+${CTOR_END}}
  98   }"
  99
 100 DTOR=" .dtors       ${CONSTRUCTING-0} :
 101   {
 102     ${CONSTRUCTING+${DTOR_START}}
 103     KEEP (*crtbegin.o(.dtors))
 104     KEEP (*crtbegin?.o(.dtors))
 105     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
 106     KEEP (*(SORT(.dtors.*)))
 107     KEEP (*(.dtors))
 108     ${CONSTRUCTING+${DTOR_END}}
 109   }"
 110
 111 # if this is for an embedded system, don't add SIZEOF_HEADERS.
 112 if [ -z "$EMBEDDED" ]; then
 113    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
 114 else
 115    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
 116 fi
 117
 118 cat <<EOF
 119 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
 120               "${LITTLE_OUTPUT_FORMAT}")
 121 OUTPUT_ARCH(${OUTPUT_ARCH})
 122 ${RELOCATING+ENTRY(${ENTRY})}
 123
 124 ${RELOCATING+${LIB_SEARCH_DIRS}}
 125 ${RELOCATING+/* Do we need any of these for elf?
 126    __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}}  */}
 127 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
 128 ${RELOCATING+${INPUT_FILES}}
 129 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
 130   if gld -r is used and the intermediate file has sections starting
 131   at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
 132   bug.  But for now assigning the zero vmas works.  */}
 133
 134 SECTIONS
 135 {
 136   ${CREATE_SHLIB-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}
 137   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0} + SIZEOF_HEADERS;}}
 138   ${CREATE_SHLIB-${INTERP}}
 139   ${TEXT_DYNAMIC+${DYNAMIC}}
 140
 141 EOF
 142 if [ "x$COMBRELOC" = x ]; then
 143   COMBRELOCCAT=cat
 144 else
 145   COMBRELOCCAT="cat > $COMBRELOC"
 146 fi
 147 eval $COMBRELOCCAT <<EOF
 148   .rel.init    ${RELOCATING-0} : { *(.rel.init) }
 149   .rela.init   ${RELOCATING-0} : { *(.rela.init)        }
 150   .rel.text    ${RELOCATING-0} :
 151     {
 152       *(.rel.text)
 153       ${RELOCATING+*(.rel.text.*)}
 154       ${RELOCATING+*(.rel.gnu.linkonce.t.*)}
 155     }
 156   .rela.text   ${RELOCATING-0} :
 157     {
 158       *(.rela.text)
 159       ${RELOCATING+*(.rela.text.*)}
 160       ${RELOCATING+*(.rela.gnu.linkonce.t.*)}
 161     }
 162   .rel.fini    ${RELOCATING-0} : { *(.rel.fini) }
 163   .rela.fini   ${RELOCATING-0} : { *(.rela.fini)        }
 164   .rel.rodata  ${RELOCATING-0} :
 165     {
 166       *(.rel.rodata)
 167       ${RELOCATING+*(.rel.rodata.*)}
 168       ${RELOCATING+*(.rel.gnu.linkonce.r.*)}
 169     }
 170   .rela.rodata ${RELOCATING-0} :
 171     {
 172       *(.rela.rodata)
 173       ${RELOCATING+*(.rela.rodata.*)}
 174       ${RELOCATING+*(.rela.gnu.linkonce.r.*)}
 175     }
 176   ${OTHER_READONLY_RELOC_SECTIONS}
 177   .rel.data    ${RELOCATING-0} :
 178     {
 179       *(.rel.data)
 180       ${RELOCATING+*(.rel.data.*)}
 181       ${RELOCATING+*(.rel.gnu.linkonce.d.*)}
 182     }
 183   .rela.data   ${RELOCATING-0} :
 184     {
 185       *(.rela.data)
 186       ${RELOCATING+*(.rela.data.*)}
 187       ${RELOCATING+*(.rela.gnu.linkonce.d.*)}
 188     }
 189   .rel.ctors   ${RELOCATING-0} : { *(.rel.ctors)        }
 190   .rela.ctors  ${RELOCATING-0} : { *(.rela.ctors)       }
 191   .rel.dtors   ${RELOCATING-0} : { *(.rel.dtors)        }
 192   .rela.dtors  ${RELOCATING-0} : { *(.rela.dtors)       }
 193   .rel.got     ${RELOCATING-0} : { *(.rel.got)          }
 194   .rela.got    ${RELOCATING-0} : { *(.rela.got)         }
 195   ${OTHER_GOT_RELOC_SECTIONS}
 196   .rel.sdata   ${RELOCATING-0} :
 197     {
 198       *(.rel.sdata)
 199       ${RELOCATING+*(.rel.sdata.*)}
 200       ${RELOCATING+*(.rel.gnu.linkonce.s.*)}
 201     }
 202   .rela.sdata   ${RELOCATING-0} :
 203     {
 204       *(.rela.sdata)
 205       ${RELOCATING+*(.rela.sdata.*)}
 206       ${RELOCATING+*(.rela.gnu.linkonce.s.*)}
 207     }
 208   .rel.sbss    ${RELOCATING-0} :
 209     {
 210       *(.rel.sbss)
 211       ${RELOCATING+*(.rel.sbss.*)}
 212       ${RELOCATING+*(.rel.gnu.linkonce.sb.*)}
 213     }
 214   .rela.sbss   ${RELOCATING-0} :
 215     {
 216       *(.rela.sbss)
 217       ${RELOCATING+*(.rela.sbss.*)}
 218       ${RELOCATING+*(.rela.gnu.linkonce.sb.*)}
 219     }
 220   .rel.sdata2  ${RELOCATING-0} :
 221     {
 222       *(.rel.sdata2)
 223       ${RELOCATING+*(.rel.sdata2.*)}
 224       ${RELOCATING+*(.rel.gnu.linkonce.s2.*)}
 225     }
 226   .rela.sdata2 ${RELOCATING-0} :
 227     {
 228       *(.rela.sdata2)
 229       ${RELOCATING+*(.rela.sdata2.*)}
 230       ${RELOCATING+*(.rela.gnu.linkonce.s2.*)}
 231     }
 232   .rel.sbss2   ${RELOCATING-0} :
 233     {
 234       *(.rel.sbss2)
 235       ${RELOCATING+*(.rel.sbss2.*)}
 236       ${RELOCATING+*(.rel.gnu.linkonce.sb2.*)}
 237     }
 238   .rela.sbss2  ${RELOCATING-0} :
 239     {
 240       *(.rela.sbss2)
 241       ${RELOCATING+*(.rela.sbss2.*)}
 242       ${RELOCATING+*(.rela.gnu.linkonce.sb2.*)}
 243     }
 244   .rel.bss     ${RELOCATING-0} :
 245     {
 246       *(.rel.bss)
 247       ${RELOCATING+*(.rel.bss.*)}
 248       ${RELOCATING+*(.rel.gnu.linkonce.b.*)}
 249     }
 250   .rela.bss    ${RELOCATING-0} :
 251     {
 252       *(.rela.bss)
 253       ${RELOCATING+*(.rela.bss.*)}
 254       ${RELOCATING+*(.rela.gnu.linkonce.b.*)}
 255     }
 256 EOF
 257 if [ -n "$COMBRELOC" ]; then
 258 cat <<EOF
 259   .rel.dyn       :
 260     {
 261 EOF
 262 sed -e '/^[     ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/      \1/' $COMBRELOC
 263 cat <<EOF
 264     }
 265   .rela.dyn      :
 266     {
 267 EOF
 268 sed -e '/^[     ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/      \1/' $COMBRELOC
 269 cat <<EOF
 270     }
 271 EOF
 272 fi
 273 cat <<EOF
 274   .rel.plt     ${RELOCATING-0} : { *(.rel.plt)          }
 275   .rela.plt    ${RELOCATING-0} : { *(.rela.plt)         }
 276   ${OTHER_PLT_RELOC_SECTIONS}
 277
 278   .init        ${RELOCATING-0} :
 279   {
 280     ${RELOCATING+${INIT_START}}
 281     KEEP (*(.init))
 282     ${RELOCATING+${INIT_END}}
 283   } =${NOP-0}
 284
 285   ${DATA_PLT-${BSS_PLT-${PLT}}}
 286   .text    ${RELOCATING-0} :
 287   {
 288     ${RELOCATING+${TEXT_START_SYMBOLS}}
 289     *(.text)
 290     ${RELOCATING+*(.text.*)}
 291     *(.stub)
 292     /* .gnu.warning sections are handled specially by elf32.em.  */
 293     *(.gnu.warning)
 294     ${RELOCATING+*(.gnu.linkonce.t.*)}
 295     ${RELOCATING+${OTHER_TEXT_SECTIONS}}
 296   } =${NOP-0}
 297   .fini    ${RELOCATING-0} :
 298   {
 299     ${RELOCATING+${FINI_START}}
 300     KEEP (*(.fini))
 301     ${RELOCATING+${FINI_END}}
 302   } =${NOP-0}
 303   ${RELOCATING+PROVIDE (__etext = .);}
 304   ${RELOCATING+PROVIDE (_etext = .);}
 305   ${RELOCATING+PROVIDE (etext = .);}
 306
 307   /* Adjust the address for the data segment.  We want to adjust up to
 308      the same address within the page on the next page up.  */
 309   ${CREATE_SHLIB-${RELOCATING+. = ${DATA_ADDR-ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))};}}
 310   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))};}}
 311
 312   .data  ${RELOCATING-0} :
 313   {
 314     ${RELOCATING+${DATA_START_SYMBOLS}}
 315     *(.data)
 316     ${RELOCATING+*(.data.*)}
 317     ${RELOCATING+*(.gnu.linkonce.d.*)}
 318     ${CONSTRUCTING+SORT(CONSTRUCTORS)}
 319   }
 320   .data1 ${RELOCATING-0} : { *(.data1) }
 321   .eh_frame ${RELOCATING-0} :
 322   {
 323     ${RELOCATING+PROVIDE (__eh_frame_begin = .);}
 324     *(.eh_frame)
 325     LONG (0);
 326     ${RELOCATING+PROVIDE (__eh_frame_end = .);}
 327   } ${RELOCATING+}
 328   .gcc_except_table : { *(.gcc_except_table) }
 329   ${INITIAL_READONLY_SECTIONS}
 330   .hash        ${RELOCATING-0} : { *(.hash)             }
 331   .dynsym      ${RELOCATING-0} : { *(.dynsym)           }
 332   .dynstr      ${RELOCATING-0} : { *(.dynstr)           }
 333   .gnu.version ${RELOCATING-0} : { *(.gnu.version)      }
 334   .gnu.version_d ${RELOCATING-0} : { *(.gnu.version_d)  }
 335   .gnu.version_r ${RELOCATING-0} : { *(.gnu.version_r)  }
 336   ${RODATA}
 337   .rodata1 ${RELOCATING-0} : { *(.rodata1) }
 338   ${CREATE_SHLIB-${SDATA2}}
 339   ${CREATE_SHLIB-${SBSS2}}
 340   ${RELOCATING+${OTHER_READONLY_SECTIONS}}
 341   ${RELOCATING+${OTHER_READWRITE_SECTIONS}}
 342   ${TEXT_DYNAMIC-${DYNAMIC}}
 343   ${RELOCATING+${CTOR}}
 344   ${RELOCATING+${DTOR}}
 345   .jcr : { KEEP (*(.jcr)) }
 346   ${DATA_PLT+${PLT}}
 347   ${RELOCATING+${OTHER_GOT_SYMBOLS}}
 348   .got          ${RELOCATING-0} : { *(.got.plt) *(.got) }
 349   ${RELOCATING+${OTHER_GOT_SECTIONS}}
 350   ${CREATE_SHLIB+${SDATA2}}
 351   ${CREATE_SHLIB+${SBSS2}}
 352   /* We want the small data sections together, so single-instruction offsets
 353      can access them all, and initialized data all before uninitialized, so
 354      we can shorten the on-disk segment size.  */
 355   .sdata   ${RELOCATING-0} :
 356   {
 357     ${RELOCATING+${SDATA_START_SYMBOLS}}
 358     *(.sdata)
 359     ${RELOCATING+*(.sdata.*)}
 360     ${RELOCATING+*(.gnu.linkonce.s.*)}
 361   }
 362   ${RELOCATING+${OTHER_SDATA_SECTIONS}}
 363   ${RELOCATING+_edata = .;}
 364   ${RELOCATING+PROVIDE (edata = .);}
 365   ${RELOCATING+__bss_start = .;}
 366   ${RELOCATING+${OTHER_BSS_SYMBOLS}}
 367   .sbss    ${RELOCATING-0} :
 368   {
 369     ${RELOCATING+PROVIDE (__sbss_start = .);}
 370     ${RELOCATING+PROVIDE (___sbss_start = .);}
 371     *(.dynsbss)
 372     *(.sbss)
 373     ${RELOCATING+*(.sbss.*)}
 374     ${RELOCATING+*(.gnu.linkonce.sb.*)}
 375     *(.scommon)
 376     ${RELOCATING+PROVIDE (__sbss_end = .);}
 377     ${RELOCATING+PROVIDE (___sbss_end = .);}
 378   }
 379   ${BSS_PLT+${PLT}}
 380   .bss     ${RELOCATING-0} :
 381   {
 382    *(.dynbss)
 383    *(.bss)
 384    ${RELOCATING+*(.bss.*)}
 385    ${RELOCATING+*(.gnu.linkonce.b.*)}
 386    *(COMMON)
 387    /* Align here to ensure that the .bss section occupies space up to
 388       _end.  Align after .bss to ensure correct alignment even if the
 389       .bss section disappears because there are no input sections.  */
 390    ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 391   }
 392   ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
 393   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 394   ${RELOCATING+${OTHER_END_SYMBOLS}}
 395   ${RELOCATING+_end = .;}
 396   ${RELOCATING+PROVIDE (end = .);}
 397
 398   /* Stabs debugging sections.  */
 399   .stab 0 : { *(.stab) }
 400   .stabstr 0 : { *(.stabstr) }
 401   .stab.excl 0 : { *(.stab.excl) }
 402   .stab.exclstr 0 : { *(.stab.exclstr) }
 403   .stab.index 0 : { *(.stab.index) }
 404   .stab.indexstr 0 : { *(.stab.indexstr) }
 405
 406   .comment 0 : { *(.comment) }
 407
 408   /* DWARF debug sections.
 409      Symbols in the DWARF debugging sections are relative to the beginning
 410      of the section so we begin them at 0.  */
 411
 412   /* DWARF 1 */
 413   .debug          0 : { *(.debug) }
 414   .line           0 : { *(.line) }
 415
 416   /* GNU DWARF 1 extensions */
 417   .debug_srcinfo  0 : { *(.debug_srcinfo) }
 418   .debug_sfnames  0 : { *(.debug_sfnames) }
 419
 420   /* DWARF 1.1 and DWARF 2 */
 421   .debug_aranges  0 : { *(.debug_aranges) }
 422   .debug_pubnames 0 : { *(.debug_pubnames) }
 423
 424   /* DWARF 2 */
 425   .debug_info     0 : { *(.debug_info) *(.gnu.linkonce.wi.*) }
 426   .debug_abbrev   0 : { *(.debug_abbrev) }
 427   .debug_line     0 : { *(.debug_line) }
 428   .debug_frame    0 : { *(.debug_frame) }
 429   .debug_str      0 : { *(.debug_str) }
 430   .debug_loc      0 : { *(.debug_loc) }
 431   .debug_macinfo  0 : { *(.debug_macinfo) }
 432
 433   /* SGI/MIPS DWARF 2 extensions */
 434   .debug_weaknames 0 : { *(.debug_weaknames) }
 435   .debug_funcnames 0 : { *(.debug_funcnames) }
 436   .debug_typenames 0 : { *(.debug_typenames) }
 437   .debug_varnames  0 : { *(.debug_varnames) }
 438
 439   ${RELOCATING+${OTHER_RELOCATING_SECTIONS}}
 440
 441   /* These must appear regardless of ${RELOCATING}.  */
 442   ${OTHER_SECTIONS}
 443 }
 444 EOF