ld/scripttempl/iq2000.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 0)
   9 #       DATA_ADDR - if end-of-text-plus-one-page isn't right for data start
  10 #       INITIAL_READONLY_SECTIONS - at start of data segment
  11 #       OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
  12 #               (e.g., .PARISC.milli)
  13 #       OTHER_TEXT_SECTIONS - these get put in .text when relocating
  14 #       OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
  15 #               (e.g., .PARISC.global)
  16 #       OTHER_SECTIONS - at the end
  17 #       EXECUTABLE_SYMBOLS - symbols that must be defined for an
  18 #               executable (e.g., _DYNAMIC_LINK)
  19 #       TEXT_START_SYMBOLS - symbols that appear at the start of the
  20 #               .text section.
  21 #       DATA_START_SYMBOLS - symbols that appear at the start of the
  22 #               .data section.
  23 #       OTHER_GOT_SYMBOLS - symbols defined just before .got.
  24 #       OTHER_GOT_SECTIONS - sections just after .got.
  25 #       OTHER_SDATA_SECTIONS - sections just after .sdata.
  26 #       OTHER_BSS_SYMBOLS - symbols that appear at the start of the
  27 #               .bss section besides __bss_start.
  28 #       DATA_PLT - .plt should be in data segment, not text segment.
  29 #       BSS_PLT - .plt should be in bss segment
  30 #       TEXT_DYNAMIC - .dynamic in text segment, not data segment.
  31 #       EMBEDDED - whether this is for an embedded system.
  32 #       SHLIB_TEXT_START_ADDR - if set, add to SIZEOF_HEADERS to set
  33 #               start address of shared library.
  34 #       INPUT_FILES - INPUT command of files to always include
  35 #       WRITABLE_RODATA - if set, the .rodata section should be writable
  36 #       INIT_START, INIT_END -  statements just before and just after
  37 #       combination of .init sections.
  38 #       FINI_START, FINI_END - statements just before and just after
  39 #       combination of .fini sections.
  40 #
  41 # When adding sections, do note that the names of some sections are used
  42 # when specifying the start address of the next.
  43 #
  44
  45 #  Many sections come in three flavours.  There is the 'real' section,
  46 #  like ".data".  Then there are the per-procedure or per-variable
  47 #  sections, generated by -ffunction-sections and -fdata-sections in GCC,
  48 #  and useful for --gc-sections, which for a variable "foo" might be
  49 #  ".data.foo".  Then there are the linkonce sections, for which the linker
  50 #  eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
  51 #  The exact correspondences are:
  52 #
  53 #  Section      Linkonce section
  54 #  .text        .gnu.linkonce.t.foo
  55 #  .rodata      .gnu.linkonce.r.foo
  56 #  .data        .gnu.linkonce.d.foo
  57 #  .bss         .gnu.linkonce.b.foo
  58 #  .sdata       .gnu.linkonce.s.foo
  59 #  .sbss        .gnu.linkonce.sb.foo
  60 #  .sdata2      .gnu.linkonce.s2.foo
  61 #  .sbss2       .gnu.linkonce.sb2.foo
  62 #
  63 #  Each of these can also have corresponding .rel.* and .rela.* sections.
  64
  65 test -z "$ENTRY" && ENTRY=_start
  66 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  67 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  68 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
  69 test -z "${ELFSIZE}" && ELFSIZE=32
  70 test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
  71 test "$LD_FLAG" = "N" && DATA_ADDR=.
  72 INTERP=".interp   ${RELOCATING-0} : { *(.interp) }"
  73 PLT=".plt    ${RELOCATING-0} : { *(.plt)        }"
  74 DYNAMIC=".dynamic     ${RELOCATING-0} : { *(.dynamic) }"
  75 RODATA=".rodata ${RELOCATING-0} : { *(.rodata) ${RELOCATING+*(.rodata.*)} ${RELOCATING+*(.gnu.linkonce.r.*)} }"
  76 SBSS2=".sbss2 ${RELOCATING-0} : { *(.sbss2) ${RELOCATING+*(.sbss2.*)} ${RELOCATING+*(.gnu.linkonce.sb2.*)} }"
  77 SDATA2=".sdata2 ${RELOCATING-0} : { *(.sdata2) ${RELOCATING+*(.sdata2.*)} ${RELOCATING+*(.gnu.linkonce.s2.*)} }"
  78 CTOR=".ctors ${CONSTRUCTING-0} :
  79   {
  80     ${CONSTRUCTING+${CTOR_START}}
  81     /* gcc uses crtbegin.o to find the start of
  82        the constructors, so we make sure it is
  83        first.  Because this is a wildcard, it
  84        doesn't matter if the user does not
  85        actually link against crtbegin.o; the
  86        linker won't look for a file to match a
  87        wildcard.  The wildcard also means that it
  88        doesn't matter which directory crtbegin.o
  89        is in.  */
  90
  91     KEEP (*crtbegin.o(.ctors))
  92     KEEP (*crtbegin?.o(.ctors))
  93
  94     /* We don't want to include the .ctor section from
  95        the crtend.o file until after the sorted ctors.
  96        The .ctor section from the crtend file contains the
  97        end of ctors marker and it must be last */
  98
  99     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))
 100     KEEP (*(SORT(.ctors.*)))
 101     KEEP (*(.ctors))
 102     ${CONSTRUCTING+${CTOR_END}}
 103   }"
 104
 105 DTOR=" .dtors       ${CONSTRUCTING-0} :
 106   {
 107     ${CONSTRUCTING+${DTOR_START}}
 108     KEEP (*crtbegin.o(.dtors))
 109     KEEP (*crtbegin?.o(.dtors))
 110     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
 111     KEEP (*(SORT(.dtors.*)))
 112     KEEP (*(.dtors))
 113     ${CONSTRUCTING+${DTOR_END}}
 114   }"
 115
 116 # If this is for an embedded system, don't add SIZEOF_HEADERS.
 117 if [ -z "$EMBEDDED" ]; then
 118    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
 119 else
 120    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
 121 fi
 122
 123 cat <<EOF
 124 /* Copyright (C) 2014-2023 Free Software Foundation, Inc.
 125
 126    Copying and distribution of this script, with or without modification,
 127    are permitted in any medium without royalty provided the copyright
 128    notice and this notice are preserved.  */
 129
 130 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
 131               "${LITTLE_OUTPUT_FORMAT}")
 132 OUTPUT_ARCH(${OUTPUT_ARCH})
 133 ${RELOCATING+ENTRY(${ENTRY})}
 134
 135 ${RELOCATING+${LIB_SEARCH_DIRS}}
 136 ${RELOCATING+/* Do we need any of these for elf?
 137    __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}}  */}
 138 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
 139 ${RELOCATING+${INPUT_FILES}}
 140 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
 141   if gld -r is used and the intermediate file has sections starting
 142   at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
 143   bug.  But for now assigning the zero vmas works.  */}
 144
 145 SECTIONS
 146 {
 147   ${CREATE_SHLIB-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}
 148   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0} + SIZEOF_HEADERS;}}
 149   ${CREATE_SHLIB-${INTERP}}
 150   ${TEXT_DYNAMIC+${DYNAMIC}}
 151
 152 EOF
 153 if [ "x$COMBRELOC" = x ]; then
 154   COMBRELOCCAT=cat
 155 else
 156   COMBRELOCCAT="cat > $COMBRELOC"
 157 fi
 158 eval $COMBRELOCCAT <<EOF
 159   .rel.init    ${RELOCATING-0} : { *(.rel.init) }
 160   .rela.init   ${RELOCATING-0} : { *(.rela.init)        }
 161   .rel.text    ${RELOCATING-0} :
 162     {
 163       *(.rel.text)
 164       ${RELOCATING+*(.rel.text.*)}
 165       ${RELOCATING+*(.rel.gnu.linkonce.t.*)}
 166     }
 167   .rela.text   ${RELOCATING-0} :
 168     {
 169       *(.rela.text)
 170       ${RELOCATING+*(.rela.text.*)}
 171       ${RELOCATING+*(.rela.gnu.linkonce.t.*)}
 172     }
 173   .rel.fini    ${RELOCATING-0} : { *(.rel.fini) }
 174   .rela.fini   ${RELOCATING-0} : { *(.rela.fini)        }
 175   .rel.rodata  ${RELOCATING-0} :
 176     {
 177       *(.rel.rodata)
 178       ${RELOCATING+*(.rel.rodata.*)}
 179       ${RELOCATING+*(.rel.gnu.linkonce.r.*)}
 180     }
 181   .rela.rodata ${RELOCATING-0} :
 182     {
 183       *(.rela.rodata)
 184       ${RELOCATING+*(.rela.rodata.*)}
 185       ${RELOCATING+*(.rela.gnu.linkonce.r.*)}
 186     }
 187   ${OTHER_READONLY_RELOC_SECTIONS}
 188   .rel.data    ${RELOCATING-0} :
 189     {
 190       *(.rel.data)
 191       ${RELOCATING+*(.rel.data.*)}
 192       ${RELOCATING+*(.rel.gnu.linkonce.d.*)}
 193     }
 194   .rela.data   ${RELOCATING-0} :
 195     {
 196       *(.rela.data)
 197       ${RELOCATING+*(.rela.data.*)}
 198       ${RELOCATING+*(.rela.gnu.linkonce.d.*)}
 199     }
 200   .rel.ctors   ${RELOCATING-0} : { *(.rel.ctors)        }
 201   .rela.ctors  ${RELOCATING-0} : { *(.rela.ctors)       }
 202   .rel.dtors   ${RELOCATING-0} : { *(.rel.dtors)        }
 203   .rela.dtors  ${RELOCATING-0} : { *(.rela.dtors)       }
 204   .rel.got     ${RELOCATING-0} : { *(.rel.got)          }
 205   .rela.got    ${RELOCATING-0} : { *(.rela.got)         }
 206   ${OTHER_GOT_RELOC_SECTIONS}
 207   .rel.sdata   ${RELOCATING-0} :
 208     {
 209       *(.rel.sdata)
 210       ${RELOCATING+*(.rel.sdata.*)}
 211       ${RELOCATING+*(.rel.gnu.linkonce.s.*)}
 212     }
 213   .rela.sdata   ${RELOCATING-0} :
 214     {
 215       *(.rela.sdata)
 216       ${RELOCATING+*(.rela.sdata.*)}
 217       ${RELOCATING+*(.rela.gnu.linkonce.s.*)}
 218     }
 219   .rel.sbss    ${RELOCATING-0} :
 220     {
 221       *(.rel.sbss)
 222       ${RELOCATING+*(.rel.sbss.*)}
 223       ${RELOCATING+*(.rel.gnu.linkonce.sb.*)}
 224     }
 225   .rela.sbss   ${RELOCATING-0} :
 226     {
 227       *(.rela.sbss)
 228       ${RELOCATING+*(.rela.sbss.*)}
 229       ${RELOCATING+*(.rela.gnu.linkonce.sb.*)}
 230     }
 231   .rel.sdata2  ${RELOCATING-0} :
 232     {
 233       *(.rel.sdata2)
 234       ${RELOCATING+*(.rel.sdata2.*)}
 235       ${RELOCATING+*(.rel.gnu.linkonce.s2.*)}
 236     }
 237   .rela.sdata2 ${RELOCATING-0} :
 238     {
 239       *(.rela.sdata2)
 240       ${RELOCATING+*(.rela.sdata2.*)}
 241       ${RELOCATING+*(.rela.gnu.linkonce.s2.*)}
 242     }
 243   .rel.sbss2   ${RELOCATING-0} :
 244     {
 245       *(.rel.sbss2)
 246       ${RELOCATING+*(.rel.sbss2.*)}
 247       ${RELOCATING+*(.rel.gnu.linkonce.sb2.*)}
 248     }
 249   .rela.sbss2  ${RELOCATING-0} :
 250     {
 251       *(.rela.sbss2)
 252       ${RELOCATING+*(.rela.sbss2.*)}
 253       ${RELOCATING+*(.rela.gnu.linkonce.sb2.*)}
 254     }
 255   .rel.bss     ${RELOCATING-0} :
 256     {
 257       *(.rel.bss)
 258       ${RELOCATING+*(.rel.bss.*)}
 259       ${RELOCATING+*(.rel.gnu.linkonce.b.*)}
 260     }
 261   .rela.bss    ${RELOCATING-0} :
 262     {
 263       *(.rela.bss)
 264       ${RELOCATING+*(.rela.bss.*)}
 265       ${RELOCATING+*(.rela.gnu.linkonce.b.*)}
 266     }
 267 EOF
 268 if [ -n "$COMBRELOC" ]; then
 269 cat <<EOF
 270   .rel.dyn       :
 271     {
 272 EOF
 273 sed -e '/^[      ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/      \1/' $COMBRELOC
 274 cat <<EOF
 275     }
 276   .rela.dyn      :
 277     {
 278 EOF
 279 sed -e '/^[      ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/      \1/' $COMBRELOC
 280 cat <<EOF
 281     }
 282 EOF
 283 fi
 284 cat <<EOF
 285   .rel.plt     ${RELOCATING-0} : { *(.rel.plt)          }
 286   .rela.plt    ${RELOCATING-0} : { *(.rela.plt)         }
 287   ${OTHER_PLT_RELOC_SECTIONS}
 288
 289   .init        ${RELOCATING-0} :
 290   {
 291     ${RELOCATING+${INIT_START}}
 292     KEEP (*(SORT_NONE(.init)))
 293     ${RELOCATING+${INIT_END}}
 294   } =${NOP-0}
 295
 296   ${DATA_PLT-${BSS_PLT-${PLT}}}
 297   .text    ${RELOCATING-0} :
 298   {
 299     ${RELOCATING+${TEXT_START_SYMBOLS}}
 300     *(.text)
 301     ${RELOCATING+*(.text.*)}
 302     *(.stub)
 303     /* .gnu.warning sections are handled specially by elf.em.  */
 304     *(.gnu.warning)
 305     ${RELOCATING+*(.gnu.linkonce.t.*)}
 306     ${RELOCATING+${OTHER_TEXT_SECTIONS}}
 307   } =${NOP-0}
 308   .fini    ${RELOCATING-0} :
 309   {
 310     ${RELOCATING+${FINI_START}}
 311     KEEP (*(SORT_NONE(.fini)))
 312     ${RELOCATING+${FINI_END}}
 313   } =${NOP-0}
 314   ${RELOCATING+PROVIDE (__etext = .);}
 315   ${RELOCATING+PROVIDE (_etext = .);}
 316   ${RELOCATING+PROVIDE (etext = .);}
 317
 318   /* Adjust the address for the data segment.  We want to adjust up to
 319      the same address within the page on the next page up.  */
 320   ${CREATE_SHLIB-${RELOCATING+. = ${DATA_ADDR-ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))};}}
 321   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))};}}
 322
 323   .data  ${RELOCATING-0} :
 324   {
 325     ${RELOCATING+${DATA_START_SYMBOLS}}
 326     *(.data)
 327     ${RELOCATING+*(.data.*)}
 328     ${RELOCATING+*(.gnu.linkonce.d.*)}
 329     ${CONSTRUCTING+SORT(CONSTRUCTORS)}
 330   }
 331   .data1 ${RELOCATING-0} : { *(.data1) }
 332   .eh_frame ${RELOCATING-0} :
 333   {
 334     ${RELOCATING+PROVIDE (__eh_frame_begin = .);}
 335     *(.eh_frame)
 336     ${RELOCATING+LONG (0);}
 337     ${RELOCATING+PROVIDE (__eh_frame_end = .);}
 338   }
 339   .gcc_except_table : { *(.gcc_except_table) }
 340   ${INITIAL_READONLY_SECTIONS}
 341   .hash        ${RELOCATING-0} : { *(.hash)             }
 342   .dynsym      ${RELOCATING-0} : { *(.dynsym)           }
 343   .dynstr      ${RELOCATING-0} : { *(.dynstr)           }
 344   .gnu.version ${RELOCATING-0} : { *(.gnu.version)      }
 345   .gnu.version_d ${RELOCATING-0} : { *(.gnu.version_d)  }
 346   .gnu.version_r ${RELOCATING-0} : { *(.gnu.version_r)  }
 347   ${RODATA}
 348   .rodata1 ${RELOCATING-0} : { *(.rodata1) }
 349   ${CREATE_SHLIB-${SDATA2}}
 350   ${CREATE_SHLIB-${SBSS2}}
 351   ${RELOCATING+${OTHER_READONLY_SECTIONS}}
 352   ${RELOCATING+${OTHER_READWRITE_SECTIONS}}
 353   ${TEXT_DYNAMIC-${DYNAMIC}}
 354   ${RELOCATING+${CTOR}}
 355   ${RELOCATING+${DTOR}}
 356   .jcr : { KEEP (*(.jcr)) }
 357   ${DATA_PLT+${PLT}}
 358   ${RELOCATING+${OTHER_GOT_SYMBOLS}}
 359   .got          ${RELOCATING-0} : {${RELOCATING+ *(.got.plt)} *(.got) }
 360   ${RELOCATING+${OTHER_GOT_SECTIONS}}
 361   ${CREATE_SHLIB+${SDATA2}}
 362   ${CREATE_SHLIB+${SBSS2}}
 363   /* We want the small data sections together, so single-instruction offsets
 364      can access them all, and initialized data all before uninitialized, so
 365      we can shorten the on-disk segment size.  */
 366   .sdata   ${RELOCATING-0} :
 367   {
 368     ${RELOCATING+${SDATA_START_SYMBOLS}}
 369     *(.sdata)
 370     ${RELOCATING+*(.sdata.*)}
 371     ${RELOCATING+*(.gnu.linkonce.s.*)}
 372   }
 373   ${RELOCATING+${OTHER_SDATA_SECTIONS}}
 374   ${RELOCATING+_edata = .;}
 375   ${RELOCATING+PROVIDE (edata = .);}
 376   ${RELOCATING+. = ALIGN(ALIGNOF(NEXT_SECTION));}
 377   ${RELOCATING+__bss_start = .;}
 378   ${RELOCATING+${OTHER_BSS_SYMBOLS}}
 379   .sbss    ${RELOCATING-0} :
 380   {
 381     ${RELOCATING+PROVIDE (__sbss_start = .);}
 382     ${RELOCATING+PROVIDE (___sbss_start = .);}
 383     ${RELOCATING+*(.dynsbss)}
 384     *(.sbss)
 385     ${RELOCATING+*(.sbss.*)}
 386     ${RELOCATING+*(.gnu.linkonce.sb.*)}
 387     ${RELOCATING+*(.scommon)}
 388     ${RELOCATING+PROVIDE (__sbss_end = .);}
 389     ${RELOCATING+PROVIDE (___sbss_end = .);}
 390   }
 391   ${BSS_PLT+${PLT}}
 392   .bss     ${RELOCATING-0} :
 393   {
 394    ${RELOCATING+*(.dynbss)}
 395    *(.bss)
 396    ${RELOCATING+*(.bss.*)}
 397    ${RELOCATING+*(.gnu.linkonce.b.*)}
 398    ${RELOCATING+*(COMMON)
 399    /* Align here to ensure that the .bss section occupies space up to
 400       _end.  Align after .bss to ensure correct alignment even if the
 401       .bss section disappears because there are no input sections.  */
 402    . = ALIGN(${ALIGNMENT});}
 403   }
 404   ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
 405   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 406   ${RELOCATING+${OTHER_END_SYMBOLS}}
 407   ${RELOCATING+_end = .;}
 408   ${RELOCATING+PROVIDE (end = .);}
 409
 410 EOF
 411
 412 source_sh $srcdir/scripttempl/misc-sections.sc
 413 source_sh $srcdir/scripttempl/DWARF.sc
 414
 415 cat <<EOF
 416   ${RELOCATING+${OTHER_RELOCATING_SECTIONS}}
 417
 418   /* These must appear regardless of ${RELOCATING}.  */
 419   ${OTHER_SECTIONS}
 420 }
 421 EOF