ld/scripttempl/elf32sh-symbian.sc

   1 # Copyright (C) 2014-2018 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 text 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 #       ATTRS_SECTIONS - at the end
  17 #       OTHER_SECTIONS - at the end
  18 #       EXECUTABLE_SYMBOLS - symbols that must be defined for an
  19 #               executable (e.g., _DYNAMIC_LINK)
  20 #       TEXT_START_SYMBOLS - symbols that appear at the start of the
  21 #               .text section.
  22 #       DATA_START_SYMBOLS - symbols that appear at the start of the
  23 #               .data section.
  24 #       OTHER_GOT_SYMBOLS - symbols defined just before .got.
  25 #       OTHER_GOT_SECTIONS - sections just after .got.
  26 #       OTHER_SDATA_SECTIONS - sections just after .sdata.
  27 #       OTHER_BSS_SYMBOLS - symbols that appear at the start of the
  28 #               .bss section besides __bss_start.
  29 #       DATA_PLT - .plt should be in data segment, not text segment.
  30 #       BSS_PLT - .plt should be in bss segment
  31 #       TEXT_DYNAMIC - .dynamic in text segment, not data segment.
  32 #       EMBEDDED - whether this is for an embedded system.
  33 #       SHLIB_TEXT_START_ADDR - if set, add to SIZEOF_HEADERS to set
  34 #               start address of shared library.
  35 #       INPUT_FILES - INPUT command of files to always include
  36 #       WRITABLE_RODATA - if set, the .rodata section should be writable
  37 #       INIT_START, INIT_END -  statements just before and just after
  38 #       combination of .init sections.
  39 #       FINI_START, FINI_END - statements just before and just after
  40 #       combination of .fini sections.
  41 #       STACK_ADDR - start of a .stack section.
  42 #       OTHER_SYMBOLS - symbols to place right at the end of the script.
  43 #
  44 # When adding sections, do note that the names of some sections are used
  45 # when specifying the start address of the next.
  46 #
  47
  48 #  Many sections come in three flavours.  There is the 'real' section,
  49 #  like ".data".  Then there are the per-procedure or per-variable
  50 #  sections, generated by -ffunction-sections and -fdata-sections in GCC,
  51 #  and useful for --gc-sections, which for a variable "foo" might be
  52 #  ".data.foo".  Then there are the linkonce sections, for which the linker
  53 #  eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
  54 #  The exact correspondences are:
  55 #
  56 #  Section      Linkonce section
  57 #  .text        .gnu.linkonce.t.foo
  58 #  .rodata      .gnu.linkonce.r.foo
  59 #  .data        .gnu.linkonce.d.foo
  60 #  .bss         .gnu.linkonce.b.foo
  61 #  .sdata       .gnu.linkonce.s.foo
  62 #  .sbss        .gnu.linkonce.sb.foo
  63 #  .sdata2      .gnu.linkonce.s2.foo
  64 #  .sbss2       .gnu.linkonce.sb2.foo
  65 #  .debug_info  .gnu.linkonce.wi.foo
  66 #  .tdata       .gnu.linkonce.td.foo
  67 #  .tbss        .gnu.linkonce.tb.foo
  68 #
  69 #  Each of these can also have corresponding .rel.* and .rela.* sections.
  70
  71 test -z "$ENTRY" && ENTRY=_start
  72 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  73 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  74 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
  75 test -z "${ELFSIZE}" && ELFSIZE=32
  76 test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
  77 test "$LD_FLAG" = "N" && DATA_ADDR=.
  78 test -n "$CREATE_SHLIB$CREATE_PIE" && test -n "$SHLIB_DATA_ADDR" && COMMONPAGESIZE=""
  79 test -z "$CREATE_SHLIB$CREATE_PIE" && test -n "$DATA_ADDR" && COMMONPAGESIZE=""
  80 test -z "$ATTRS_SECTIONS" && ATTRS_SECTIONS=".gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }"
  81 DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
  82 DATA_SEGMENT_END=""
  83 if test -n "${COMMONPAGESIZE}"; then
  84   DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
  85   DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
  86 fi
  87  INTERP=".interp    ALIGN(4) : { *(.interp) }"
  88     PLT=".plt            : { *(.plt) } :dynamic :dyn"
  89 DYNAMIC=".dynamic        : { *(.dynamic) } :dynamic :dyn"
  90  RODATA=".rodata    ALIGN(4) : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }"
  91 DISCARDED="/DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.directive)  *(.gnu.lto_*) }"
  92 test -z "$GOT" && GOT=".got          ${RELOCATING-0} : { *(.got.plt) *(.got) } :dynamic :dyn"
  93 INIT_ARRAY=".init_array   ${RELOCATING-0} :
  94   {
  95      ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__init_array_start = .);}}
  96      KEEP (*(SORT(.init_array.*)))
  97      KEEP (*(.init_array))
  98      ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__init_array_end = .);}}
  99   }"
 100 FINI_ARRAY=".fini_array   ${RELOCATING-0} :
 101   {
 102     ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__fini_array_start = .);}}
 103     KEEP (*(SORT(.fini_array.*)))
 104     KEEP (*(.fini_array))
 105     ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__fini_array_end = .);}}
 106   }"
 107 CTOR=".ctors     ALIGN(4) :
 108   {
 109     ${CONSTRUCTING+${CTOR_START}}
 110     /* gcc uses crtbegin.o to find the start of
 111        the constructors, so we make sure it is
 112        first.  Because this is a wildcard, it
 113        doesn't matter if the user does not
 114        actually link against crtbegin.o; the
 115        linker won't look for a file to match a
 116        wildcard.  The wildcard also means that it
 117        doesn't matter which directory crtbegin.o
 118        is in.  */
 119
 120     KEEP (*crtbegin.o(.ctors))
 121     KEEP (*crtbegin?.o(.ctors))
 122
 123     /* We don't want to include the .ctor section from
 124        the crtend.o file until after the sorted ctors.
 125        The .ctor section from the crtend file contains the
 126        end of ctors marker and it must be last */
 127
 128     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))
 129     KEEP (*(SORT(.ctors.*)))
 130     KEEP (*(.ctors))
 131     ${CONSTRUCTING+${CTOR_END}}
 132   } :text"
 133 DTOR=".dtors        ALIGN(4) :
 134   {
 135     ${CONSTRUCTING+${DTOR_START}}
 136     KEEP (*crtbegin.o(.dtors))
 137     KEEP (*crtbegin?.o(.dtors))
 138     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
 139     KEEP (*(SORT(.dtors.*)))
 140     KEEP (*(.dtors))
 141     ${CONSTRUCTING+${DTOR_END}}
 142   } :text"
 143 STACK="  .stack        ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
 144   {
 145     ${RELOCATING+_stack = .;}
 146     *(.stack)
 147   } :data"
 148
 149 # If this is for an embedded system, don't add SIZEOF_HEADERS.
 150 if [ -z "$EMBEDDED" ]; then
 151    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
 152 else
 153    test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
 154 fi
 155
 156 cat <<EOF
 157 /* Copyright (C) 2014-2018 Free Software Foundation, Inc.
 158
 159    Copying and distribution of this script, with or without modification,
 160    are permitted in any medium without royalty provided the copyright
 161    notice and this notice are preserved.  */
 162
 163 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
 164               "${LITTLE_OUTPUT_FORMAT}")
 165 OUTPUT_ARCH(${OUTPUT_ARCH})
 166 ${RELOCATING+ENTRY(${ENTRY})}
 167
 168 ${RELOCATING+${LIB_SEARCH_DIRS}}
 169 ${RELOCATING+/* Do we need any of these for elf?
 170    __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}}  */}
 171 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
 172 ${RELOCATING+${INPUT_FILES}}
 173 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
 174   if gld -r is used and the intermediate file has sections starting
 175   at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
 176   bug.  But for now assigning the zero vmas works.  */}
 177
 178 PHDRS
 179 {
 180   headers PT_PHDR PHDRS ;
 181   text    PT_LOAD ;
 182   data    PT_LOAD ;
 183   dyn     PT_LOAD FLAGS (0) ;
 184   dynamic PT_DYNAMIC ;
 185 }
 186
 187 SECTIONS
 188 {
 189   /* Read-only sections, merged into text segment: */
 190   ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}}
 191   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}}
 192   ${CREATE_PIE+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}}
 193   ${CREATE_SHLIB-${INTERP}}
 194
 195   ${INITIAL_READONLY_SECTIONS}
 196
 197   .init ALIGN(4) :
 198   {
 199     ${RELOCATING+${INIT_START}}
 200     KEEP (*(.init))
 201     ${RELOCATING+${INIT_END}}
 202   } :text =${NOP-0}
 203
 204   .text ALIGN(4) :
 205   {
 206     ${RELOCATING+${TEXT_START_SYMBOLS}}
 207     *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
 208     /* .gnu.warning sections are handled specially by elf32.em.  */
 209     *(.gnu.warning)
 210     ${RELOCATING+${OTHER_TEXT_SECTIONS}}
 211   } =${NOP-0}
 212
 213   ${RELOCATING+${CTOR}}
 214   ${RELOCATING+${DTOR}}
 215
 216   .fini ALIGN(4) :
 217   {
 218     ${RELOCATING+${FINI_START}}
 219     KEEP (*(.fini))
 220     ${RELOCATING+${FINI_END}}
 221   } =${NOP-0}
 222
 223   ${RELOCATING+PROVIDE (__etext = .);}
 224   ${RELOCATING+PROVIDE (_etext = .);}
 225   ${RELOCATING+PROVIDE (etext = .);}
 226
 227   ${WRITABLE_RODATA-${RODATA}}
 228   .rodata1 ALIGN(4) : { *(.rodata1) }
 229
 230   ExportTable  ALIGN(4) : { KEEP (*(ExportTable)) }
 231   .eh_frame_hdr ALIGN(4) : { *(.eh_frame_hdr) } :text
 232
 233   /* Adjust the address for the data segment.  We want to adjust up to
 234      the same address within the page on the next page up.  */
 235   . = ALIGN(128) + (. & (128 - 1));
 236   .preinit_array   ${RELOCATING-0} :
 237   {
 238     ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__preinit_array_start = .);}}
 239     KEEP (*(.preinit_array))
 240     ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__preinit_array_end = .);}}
 241   }
 242   ${RELOCATING+${INIT_ARRAY}}
 243   ${RELOCATING+${FINI_ARRAY}}
 244
 245   ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}}
 246   ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
 247   ${CREATE_PIE+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
 248
 249   .data  ALIGN(4) :
 250   {
 251     ${RELOCATING+${DATA_START_SYMBOLS}}
 252     *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
 253     ${CONSTRUCTING+SORT(CONSTRUCTORS)}
 254   } :data
 255
 256   .data1            ALIGN(4) : { *(.data1) } :data
 257   .tdata            ALIGN(4) : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) } :data
 258   .tbss             ALIGN(4) : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} } :data
 259   .eh_frame         ALIGN(4) : { KEEP (*(.eh_frame)) } :data
 260   .gcc_except_table ALIGN(4) : { *(.gcc_except_table) } :data
 261   ${WRITABLE_RODATA+${RODATA}}
 262   ${OTHER_READWRITE_SECTIONS}
 263   ${SDATA}
 264   ${OTHER_SDATA_SECTIONS}
 265   ${RELOCATING+_edata = .;}
 266   ${RELOCATING+PROVIDE (edata = .);}
 267   ${RELOCATING+__bss_start = .;}
 268   ${RELOCATING+${OTHER_BSS_SYMBOLS}}
 269   ${BSS_PLT+${PLT}}
 270   .bss  ALIGN(4) :
 271   {
 272    *(.dynbss)
 273    *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
 274    *(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    ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 279   } :data
 280   ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
 281   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 282   ${RELOCATING+${OTHER_END_SYMBOLS}}
 283   ${RELOCATING+_end = .;}
 284   ${RELOCATING+PROVIDE (end = .);}
 285   ${RELOCATING+${DATA_SEGMENT_END}}
 286
 287   ${TEXT_DYNAMIC-${DYNAMIC}}
 288   ${TEXT_DYNAMIC+${DYNAMIC}}
 289   .hash         ${RELOCATING-0} : { *(.hash) } :dynamic :dyn
 290   .dynsym       ${RELOCATING-0} : { *(.dynsym) } :dynamic :dyn
 291   .dynstr       ${RELOCATING-0} : { *(.dynstr) } :dynamic :dyn
 292   ${DATA_PLT-${BSS_PLT-${PLT}}}
 293   .got.plt        : { *(.got.plt) } :dynamic :dyn
 294   .gnu.version  ${RELOCATING-0} : { *(.gnu.version) }
 295   .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
 296   .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
 297 EOF
 298 if [ "x$COMBRELOC" = x ]; then
 299   COMBRELOCCAT=cat
 300 else
 301   COMBRELOCCAT="cat > $COMBRELOC"
 302 fi
 303 eval $COMBRELOCCAT <<EOF
 304   .rel.init     ${RELOCATING-0} : { *(.rel.init) }
 305   .rela.init    ${RELOCATING-0} : { *(.rela.init) }
 306   .rel.text     ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
 307   .rela.text    ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
 308   .rel.fini     ${RELOCATING-0} : { *(.rel.fini) }
 309   .rela.fini    ${RELOCATING-0} : { *(.rela.fini) }
 310   .rel.rodata   ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
 311   .rela.rodata  ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
 312   ${OTHER_READONLY_RELOC_SECTIONS}
 313   .rel.data     ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
 314   .rela.data    ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
 315   .rel.tdata    ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
 316   .rela.tdata   ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
 317   .rel.tbss     ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
 318   .rela.tbss    ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
 319   .rel.ctors    ${RELOCATING-0} : { *(.rel.ctors) }
 320   .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors) }
 321   .rel.dtors    ${RELOCATING-0} : { *(.rel.dtors) }
 322   .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors) }
 323   .rel.got      ${RELOCATING-0} : { *(.rel.got) }
 324   .rela.got     ${RELOCATING-0} : { *(.rela.got) }
 325   ${OTHER_GOT_RELOC_SECTIONS}
 326   .rel.bss      ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
 327   .rela.bss     ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
 328 EOF
 329 if [ -n "$COMBRELOC" ]; then
 330 cat <<EOF
 331   .rel.dyn      ${RELOCATING-0} :
 332     {
 333 EOF
 334 sed -e '/^[      ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/      \1/' $COMBRELOC
 335 cat <<EOF
 336     }
 337   .rela.dyn     ${RELOCATING-0} :
 338     {
 339 EOF
 340 sed -e '/^[      ]*[{}][         ]*$/d;/:[       ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/      \1/' $COMBRELOC
 341 cat <<EOF
 342     }
 343 EOF
 344 fi
 345 cat <<EOF
 346   .rel.plt      ${RELOCATING-0} : { *(.rel.plt) }
 347   .rela.plt     ${RELOCATING-0} : { *(.rela.plt) }
 348   ${OTHER_PLT_RELOC_SECTIONS}
 349
 350
 351   /* Stabs debugging sections.  */
 352   .stab          0 : { *(.stab) }
 353   .stabstr       0 : { *(.stabstr) }
 354   .stab.excl     0 : { *(.stab.excl) }
 355   .stab.exclstr  0 : { *(.stab.exclstr) }
 356   .stab.index    0 : { *(.stab.index) }
 357   .stab.indexstr 0 : { *(.stab.indexstr) }
 358
 359   .comment       0 : { *(.comment) }
 360
 361 EOF
 362
 363 . $srcdir/scripttempl/DWARF.sc
 364
 365 cat <<EOF
 366   ${STACK_ADDR+${STACK}}
 367   ${ATTRS_SECTIONS}
 368   ${OTHER_SECTIONS}
 369   ${RELOCATING+${OTHER_SYMBOLS}}
 370   ${RELOCATING+${DISCARDED}}
 371 }
 372 EOF