ld/scripttempl/elf32sh-symbian.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 text 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 #       STACK_ADDR - start of a .stack section.
  36 #       OTHER_SYMBOLS - symbols to place right at the end of the script.
  37 #
  38 # When adding sections, do note that the names of some sections are used
  39 # when specifying the start address of the next.
  40 #
  41
  42 #  Many sections come in three flavours.  There is the 'real' section,
  43 #  like ".data".  Then there are the per-procedure or per-variable
  44 #  sections, generated by -ffunction-sections and -fdata-sections in GCC,
  45 #  and useful for --gc-sections, which for a variable "foo" might be
  46 #  ".data.foo".  Then there are the linkonce sections, for which the linker
  47 #  eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
  48 #  The exact correspondences are:
  49 #
  50 #  Section      Linkonce section
  51 #  .text        .gnu.linkonce.t.foo
  52 #  .rodata      .gnu.linkonce.r.foo
  53 #  .data        .gnu.linkonce.d.foo
  54 #  .bss         .gnu.linkonce.b.foo
  55 #  .sdata       .gnu.linkonce.s.foo
  56 #  .sbss        .gnu.linkonce.sb.foo
  57 #  .sdata2      .gnu.linkonce.s2.foo
  58 #  .sbss2       .gnu.linkonce.sb2.foo
  59 #  .debug_info  .gnu.linkonce.wi.foo
  60 #  .tdata       .gnu.linkonce.td.foo
  61 #  .tbss        .gnu.linkonce.tb.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 "$LD_FLAG" = "N" && DATA_ADDR=.
  72 test -n "$CREATE_SHLIB$CREATE_PIE" && test -n "$SHLIB_DATA_ADDR" && COMMONPAGESIZE=""
  73 test -z "$CREATE_SHLIB$CREATE_PIE" && test -n "$DATA_ADDR" && COMMONPAGESIZE=""
  74 DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
  75 DATA_SEGMENT_END=""
  76 if test -n "${COMMONPAGESIZE}"; then
  77   DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
  78   DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
  79 fi
  80  INTERP=".interp    ALIGN(4) : { *(.interp) }"
  81     PLT=".plt            : { *(.plt) } :dynamic :dyn"
  82 DYNAMIC=".dynamic        : { *(.dynamic) } :dynamic :dyn"
  83  RODATA=".rodata    ALIGN(4) : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }"
  84 STACKNOTE="/DISCARD/ : { *(.note.GNU-stack)  *(.directive) }"
  85 test -z "$GOT" && GOT=".got          ${RELOCATING-0} : { *(.got.plt) *(.got) } :dynamic :dyn"
  86 CTOR=".ctors     ALIGN(4) :
  87   {
  88     ${CONSTRUCTING+${CTOR_START}}
  89     /* gcc uses crtbegin.o to find the start of
  90        the constructors, so we make sure it is
  91        first.  Because this is a wildcard, it
  92        doesn't matter if the user does not
  93        actually link against crtbegin.o; the
  94        linker won't look for a file to match a
  95        wildcard.  The wildcard also means that it
  96        doesn't matter which directory crtbegin.o
  97        is in.  */
  98
  99     KEEP (*crtbegin*.o(.ctors))
 100
 101     /* We don't want to include the .ctor section from
 102        from the crtend.o file until after the sorted ctors.
 103        The .ctor section from the crtend file contains the
 104        end of ctors marker and it must be last */
 105
 106     KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .ctors))
 107     KEEP (*(SORT(.ctors.*)))
 108     KEEP (*(.ctors))
 109     ${CONSTRUCTING+${CTOR_END}}
 110   } :text"
 111 DTOR=".dtors        ALIGN(4) :
 112   {
 113     ${CONSTRUCTING+${DTOR_START}}
 114     KEEP (*crtbegin*.o(.dtors))
 115     KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .dtors))
 116     KEEP (*(SORT(.dtors.*)))
 117     KEEP (*(.dtors))
 118     ${CONSTRUCTING+${DTOR_END}}
 119   } :text"
 120 STACK="  .stack        ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
 121   {
 122     ${RELOCATING+_stack = .;}
 123     *(.stack)
 124   } :data"
 125
 126 # if this is for an embedded system, don't add SIZEOF_HEADERS.
 127 if [ -z "$EMBEDDED" ]; then
 128    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
 129 else
 130    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
 131 fi
 132
 133 cat <<EOF
 134 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
 135               "${LITTLE_OUTPUT_FORMAT}")
 136 OUTPUT_ARCH(${OUTPUT_ARCH})
 137 ENTRY(${ENTRY})
 138
 139 ${RELOCATING+${LIB_SEARCH_DIRS}}
 140 ${RELOCATING+/* Do we need any of these for elf?
 141    __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}}  */}
 142 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
 143 ${RELOCATING+${INPUT_FILES}}
 144 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
 145   if gld -r is used and the intermediate file has sections starting
 146   at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
 147   bug.  But for now assigning the zero vmas works.  */}
 148
 149 PHDRS
 150 {
 151   headers PT_PHDR PHDRS ;
 152   text    PT_LOAD ;
 153   data    PT_LOAD ;
 154   dyn     PT_LOAD FLAGS (0) ;
 155   dynamic PT_DYNAMIC ;
 156 }
 157
 158 SECTIONS
 159 {
 160   /* Read-only sections, merged into text segment: */
 161   ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}}
 162   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}}
 163   ${CREATE_PIE+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}}
 164   ${CREATE_SHLIB-${INTERP}}
 165
 166   ${INITIAL_READONLY_SECTIONS}
 167
 168   .init ALIGN(4) :
 169   {
 170     ${RELOCATING+${INIT_START}}
 171     KEEP (*(.init))
 172     ${RELOCATING+${INIT_END}}
 173   } :text =${NOP-0}
 174
 175   .text ALIGN(4) :
 176   {
 177     ${RELOCATING+${TEXT_START_SYMBOLS}}
 178     *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
 179     /* .gnu.warning sections are handled specially by elf32.em.  */
 180     *(.gnu.warning)
 181     ${RELOCATING+${OTHER_TEXT_SECTIONS}}
 182   } =${NOP-0}
 183
 184   ${RELOCATING+${CTOR}}
 185   ${RELOCATING+${DTOR}}
 186
 187   .fini ALIGN(4) :
 188   {
 189     ${RELOCATING+${FINI_START}}
 190     KEEP (*(.fini))
 191     ${RELOCATING+${FINI_END}}
 192   } =${NOP-0}
 193
 194   ${RELOCATING+PROVIDE (__etext = .);}
 195   ${RELOCATING+PROVIDE (_etext = .);}
 196   ${RELOCATING+PROVIDE (etext = .);}
 197
 198   ${WRITABLE_RODATA-${RODATA}}
 199   .rodata1 ALIGN(4) : { *(.rodata1) }
 200
 201   ExportTable  ALIGN(4) : { KEEP (*(ExportTable)) }
 202   .eh_frame_hdr ALIGN(4) : { *(.eh_frame_hdr) } :text
 203
 204   /* Adjust the address for the data segment.  We want to adjust up to
 205      the same address within the page on the next page up.  */
 206   . = ALIGN(128) + (. & (128 - 1));
 207   /* Ensure the __preinit_array_start label is properly aligned.  We
 208      could instead move the label definition inside the section, but
 209      the linker would then create the section even if it turns out to
 210      be empty, which isn't pretty.  */
 211   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 212   ${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_start = .);}}
 213   .preinit_array   ${RELOCATING-0} : { *(.preinit_array) }
 214   ${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_end = .);}}
 215
 216   ${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_start = .);}}
 217   .init_array   ${RELOCATING-0} : { *(.init_array) }
 218   ${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_end = .);}}
 219
 220   ${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_start = .);}}
 221   .fini_array   ${RELOCATING-0} : { *(.fini_array) }
 222   ${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_end = .);}}
 223
 224   ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}}
 225   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
 226   ${CREATE_PIE+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
 227
 228   .data  ALIGN(4) :
 229   {
 230     ${RELOCATING+${DATA_START_SYMBOLS}}
 231     *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
 232     ${CONSTRUCTING+SORT(CONSTRUCTORS)}
 233   } :data
 234
 235   .data1            ALIGN(4) : { *(.data1) } :data
 236   .tdata            ALIGN(4) : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) } :data
 237   .tbss             ALIGN(4) : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} } :data
 238   .eh_frame         ALIGN(4) : { KEEP (*(.eh_frame)) } :data
 239   .gcc_except_table ALIGN(4) : { *(.gcc_except_table) } :data
 240   ${WRITABLE_RODATA+${RODATA}}
 241   ${OTHER_READWRITE_SECTIONS}
 242   ${SDATA}
 243   ${OTHER_SDATA_SECTIONS}
 244   ${RELOCATING+_edata = .;}
 245   ${RELOCATING+PROVIDE (edata = .);}
 246   ${RELOCATING+__bss_start = .;}
 247   ${RELOCATING+${OTHER_BSS_SYMBOLS}}
 248   ${BSS_PLT+${PLT}}
 249   .bss  ALIGN(4) :
 250   {
 251    *(.dynbss)
 252    *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
 253    *(COMMON)
 254    /* Align here to ensure that the .bss section occupies space up to
 255       _end.  Align after .bss to ensure correct alignment even if the
 256       .bss section disappears because there are no input sections.  */
 257    ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 258   } :data
 259   ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
 260   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 261   ${RELOCATING+${OTHER_END_SYMBOLS}}
 262   ${RELOCATING+_end = .;}
 263   ${RELOCATING+PROVIDE (end = .);}
 264   ${RELOCATING+${DATA_SEGMENT_END}}
 265
 266   ${TEXT_DYNAMIC-${DYNAMIC}}
 267   ${TEXT_DYNAMIC+${DYNAMIC}}
 268   .hash         ${RELOCATING-0} : { *(.hash) } :dynamic :dyn
 269   .dynsym       ${RELOCATING-0} : { *(.dynsym) } :dynamic :dyn
 270   .dynstr       ${RELOCATING-0} : { *(.dynstr) } :dynamic :dyn
 271   ${DATA_PLT-${BSS_PLT-${PLT}}}
 272   .got.plt        : { *(.got.plt) } :dynamic :dyn
 273   .gnu.version  ${RELOCATING-0} : { *(.gnu.version) }
 274   .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
 275   .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
 276 EOF
 277 if [ "x$COMBRELOC" = x ]; then
 278   COMBRELOCCAT=cat
 279 else
 280   COMBRELOCCAT="cat > $COMBRELOC"
 281 fi
 282 eval $COMBRELOCCAT <<EOF
 283   .rel.init     ${RELOCATING-0} : { *(.rel.init) }
 284   .rela.init    ${RELOCATING-0} : { *(.rela.init) }
 285   .rel.text     ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
 286   .rela.text    ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
 287   .rel.fini     ${RELOCATING-0} : { *(.rel.fini) }
 288   .rela.fini    ${RELOCATING-0} : { *(.rela.fini) }
 289   .rel.rodata   ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
 290   .rela.rodata  ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
 291   ${OTHER_READONLY_RELOC_SECTIONS}
 292   .rel.data     ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
 293   .rela.data    ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
 294   .rel.tdata    ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
 295   .rela.tdata   ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
 296   .rel.tbss     ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
 297   .rela.tbss    ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
 298   .rel.ctors    ${RELOCATING-0} : { *(.rel.ctors) }
 299   .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors) }
 300   .rel.dtors    ${RELOCATING-0} : { *(.rel.dtors) }
 301   .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors) }
 302   .rel.got      ${RELOCATING-0} : { *(.rel.got) }
 303   .rela.got     ${RELOCATING-0} : { *(.rela.got) }
 304   ${OTHER_GOT_RELOC_SECTIONS}
 305   .rel.bss      ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
 306   .rela.bss     ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
 307 EOF
 308 if [ -n "$COMBRELOC" ]; then
 309 cat <<EOF
 310   .rel.dyn      ${RELOCATING-0} :
 311     {
 312 EOF
 313 sed -e '/^[     ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/      \1/' $COMBRELOC
 314 cat <<EOF
 315     }
 316   .rela.dyn     ${RELOCATING-0} :
 317     {
 318 EOF
 319 sed -e '/^[     ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/      \1/' $COMBRELOC
 320 cat <<EOF
 321     }
 322 EOF
 323 fi
 324 cat <<EOF
 325   .rel.plt      ${RELOCATING-0} : { *(.rel.plt) }
 326   .rela.plt     ${RELOCATING-0} : { *(.rela.plt) }
 327   ${OTHER_PLT_RELOC_SECTIONS}
 328
 329
 330   /* Stabs debugging sections.  */
 331   .stab          0 : { *(.stab) }
 332   .stabstr       0 : { *(.stabstr) }
 333   .stab.excl     0 : { *(.stab.excl) }
 334   .stab.exclstr  0 : { *(.stab.exclstr) }
 335   .stab.index    0 : { *(.stab.index) }
 336   .stab.indexstr 0 : { *(.stab.indexstr) }
 337
 338   .comment       0 : { *(.comment) }
 339
 340   /* DWARF debug sections.
 341      Symbols in the DWARF debugging sections are relative to the beginning
 342      of the section so we begin them at 0.  */
 343
 344   /* DWARF 1 */
 345   .debug          0 : { *(.debug) }
 346   .line           0 : { *(.line) }
 347
 348   /* GNU DWARF 1 extensions */
 349   .debug_srcinfo  0 : { *(.debug_srcinfo) }
 350   .debug_sfnames  0 : { *(.debug_sfnames) }
 351
 352   /* DWARF 1.1 and DWARF 2 */
 353   .debug_aranges  0 : { *(.debug_aranges) }
 354   .debug_pubnames 0 : { *(.debug_pubnames) }
 355
 356   /* DWARF 2 */
 357   .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
 358   .debug_abbrev   0 : { *(.debug_abbrev) }
 359   .debug_line     0 : { *(.debug_line) }
 360   .debug_frame    0 : { *(.debug_frame) }
 361   .debug_str      0 : { *(.debug_str) }
 362   .debug_loc      0 : { *(.debug_loc) }
 363   .debug_macinfo  0 : { *(.debug_macinfo) }
 364
 365   /* SGI/MIPS DWARF 2 extensions */
 366   .debug_weaknames 0 : { *(.debug_weaknames) }
 367   .debug_funcnames 0 : { *(.debug_funcnames) }
 368   .debug_typenames 0 : { *(.debug_typenames) }
 369   .debug_varnames  0 : { *(.debug_varnames) }
 370
 371   ${STACK_ADDR+${STACK}}
 372   ${OTHER_SECTIONS}
 373   ${RELOCATING+${OTHER_SYMBOLS}}
 374   ${RELOCATING+${STACKNOTE}}
 375 }
 376 EOF