ld/scripttempl/elfppc.sc

   1 #
   2 # Unusual variables checked by this code:
   3 #       NOP - two 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 #       OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
   6 #               (e.g., .PARISC.milli)
   7 #       OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
   8 #               (e.g., .PARISC.global)
   9 #       OTHER_SECTIONS - at the end
  10 #       EXECUTABLE_SYMBOLS - symbols that must be defined for an
  11 #               executable (e.g., _DYNAMIC_LINK)
  12 #       TEXT_START_SYMBOLS - symbols that appear at the start of the
  13 #               .text section.
  14 #       DATA_START_SYMBOLS - symbols that appear at the start of the
  15 #               .data section.
  16 #       OTHER_BSS_SYMBOLS - symbols that appear at the start of the
  17 #               .bss section besides __bss_start.
  18 #
  19 # When adding sections, do note that the names of some sections are used
  20 # when specifying the start address of the next.
  21 #
  22 test -z "$ENTRY" && ENTRY=_start
  23 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  24 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  25 test "$LD_FLAG" = "N" && DATA_ADDR=.
  26 SBSS2=".sbss2 ${RELOCATING-0} : { *(.sbss2) }"
  27 SDATA2=".sdata2 ${RELOCATING-0} : { *(.sdata2) }"
  28 INTERP=".interp ${RELOCATING-0} : { *(.interp) }"
  29 PLT=".plt ${RELOCATING-0} : { *(.plt) }"
  30 CTOR=".ctors ${CONSTRUCTING-0} :
  31   {
  32     ${CONSTRUCTING+${CTOR_START}}
  33     /* gcc uses crtbegin.o to find the start of
  34        the constructors, so we make sure it is
  35        first.  Because this is a wildcard, it
  36        doesn't matter if the user does not
  37        actually link against crtbegin.o; the
  38        linker won't look for a file to match a
  39        wildcard.  The wildcard also means that it
  40        doesn't matter which directory crtbegin.o
  41        is in.  */
  42
  43     KEEP (*crtbegin.o(.ctors))
  44
  45     /* We don't want to include the .ctor section from
  46        from the crtend.o file until after the sorted ctors.
  47        The .ctor section from the crtend file contains the
  48        end of ctors marker and it must be last */
  49
  50     KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
  51     KEEP (*(SORT(.ctors.*)))
  52     KEEP (*(.ctors))
  53     ${CONSTRUCTING+${CTOR_END}}
  54   }"
  55
  56 DTOR=" .dtors       ${CONSTRUCTING-0} :
  57   {
  58     ${CONSTRUCTING+${DTOR_START}}
  59     KEEP (*crtbegin.o(.dtors))
  60     KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
  61     KEEP (*(SORT(.dtors.*)))
  62     KEEP (*(.dtors))
  63     ${CONSTRUCTING+${DTOR_END}}
  64   }"
  65
  66 cat <<EOF
  67 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
  68               "${LITTLE_OUTPUT_FORMAT}")
  69 OUTPUT_ARCH(${ARCH})
  70 ENTRY(${ENTRY})
  71
  72 ${RELOCATING+${LIB_SEARCH_DIRS}}
  73 ${RELOCATING+/* Do we need any of these for elf?
  74    __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}}  */}
  75 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
  76 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
  77   if gld -r is used and the intermediate file has sections starting
  78   at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
  79   bug.  But for now assigning the zero vmas works.  */}
  80
  81 ${RELOCATING+PROVIDE (__stack = 0);}
  82 ${RELOCATING+PROVIDE (___stack = 0);}
  83 SECTIONS
  84 {
  85   /* Read-only sections, merged into text segment: */
  86   ${CREATE_SHLIB-${RELOCATING+. = ${TEXT_START_ADDR} + SIZEOF_HEADERS;}}
  87   ${CREATE_SHLIB+${RELOCATING+. = SIZEOF_HEADERS;}}
  88   ${CREATE_SHLIB-${INTERP}}
  89   .hash         ${RELOCATING-0} : { *(.hash)            }
  90   .dynsym       ${RELOCATING-0} : { *(.dynsym)          }
  91   .dynstr       ${RELOCATING-0} : { *(.dynstr)          }
  92   .gnu.version ${RELOCATING-0} : { *(.gnu.version)      }
  93   .gnu.version_d ${RELOCATING-0} : { *(.gnu.version_d)  }
  94   .gnu.version_r ${RELOCATING-0} : { *(.gnu.version_r)  }
  95   .rela.text   ${RELOCATING-0} :
  96     {
  97       *(.rela.text)
  98       ${RELOCATING+*(.rela.text.*)}
  99       ${RELOCATING+*(.rela.gnu.linkonce.t*)}
 100     }
 101   .rela.data   ${RELOCATING-0} :
 102     {
 103       *(.rela.data)
 104       ${RELOCATING+*(.rela.data.*)}
 105       ${RELOCATING+*(.rela.gnu.linkonce.d*)}
 106     }
 107   .rela.rodata ${RELOCATING-0} :
 108     {
 109       *(.rela.rodata)
 110       ${RELOCATING+*(.rela.rodata.*)}
 111       ${RELOCATING+*(.rela.gnu.linkonce.r*)}
 112     }
 113   .rela.got     ${RELOCATING-0} : { *(.rela.got)        }
 114   .rela.got1    ${RELOCATING-0} : { *(.rela.got1)       }
 115   .rela.got2    ${RELOCATING-0} : { *(.rela.got2)       }
 116   .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors)      }
 117   .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors)      }
 118   .rela.init    ${RELOCATING-0} : { *(.rela.init)       }
 119   .rela.fini    ${RELOCATING-0} : { *(.rela.fini)       }
 120   .rela.bss     ${RELOCATING-0} : { *(.rela.bss)        }
 121   .rela.plt     ${RELOCATING-0} : { *(.rela.plt)        }
 122   .rela.sdata   ${RELOCATING-0} : { *(.rela.sdata)      }
 123   .rela.sbss    ${RELOCATING-0} : { *(.rela.sbss)       }
 124   .rela.sdata2  ${RELOCATING-0} : { *(.rela.sdata2)     }
 125   .rela.sbss2   ${RELOCATING-0} : { *(.rela.sbss2)      }
 126   .text    ${RELOCATING-0} :
 127   {
 128     ${RELOCATING+${TEXT_START_SYMBOLS}}
 129     *(.text)
 130     ${RELOCATING+*(.text.*)}
 131     /* .gnu.warning sections are handled specially by elf32.em.  */
 132     *(.gnu.warning)
 133     ${RELOCATING+*(.gnu.linkonce.t*)}
 134   } =${NOP-0}
 135   .init         ${RELOCATING-0} : { KEEP (*(.init))     } =${NOP-0}
 136   .fini         ${RELOCATING-0} : { KEEP (*(.fini))     } =${NOP-0}
 137   .rodata  ${RELOCATING-0} :
 138   {
 139     *(.rodata)
 140     ${RELOCATING+*(.rodata.*)}
 141     ${RELOCATING+*(.gnu.linkonce.r*)}
 142   }
 143   .rodata1      ${RELOCATING-0} : { *(.rodata1) }
 144   ${RELOCATING+_etext = .;}
 145   ${RELOCATING+PROVIDE (etext = .);}
 146   ${RELOCATING+PROVIDE (__etext = .);}
 147   ${CREATE_SHLIB-${SDATA2}}
 148   ${CREATE_SHLIB-${SBSS2}}
 149   ${RELOCATING+${OTHER_READONLY_SECTIONS}}
 150
 151   /* Adjust the address for the data segment.  We want to adjust up to
 152      the same address within the page on the next page up.  It would
 153      be more correct to do this:
 154        ${RELOCATING+. = ${DATA_ADDR-ALIGN(${MAXPAGESIZE}) + (ALIGN(8) & (${MAXPAGESIZE} - 1))};}
 155      The current expression does not correctly handle the case of a
 156      text segment ending precisely at the end of a page; it causes the
 157      data segment to skip a page.  The above expression does not have
 158      this problem, but it will currently (2/95) cause BFD to allocate
 159      a single segment, combining both text and data, for this case.
 160      This will prevent the text segment from being shared among
 161      multiple executions of the program; I think that is more
 162      important than losing a page of the virtual address space (note
 163      that no actual memory is lost; the page which is skipped can not
 164      be referenced).  */
 165   ${RELOCATING+. = ${DATA_ADDR- ALIGN(8) + ${MAXPAGESIZE}};}
 166
 167   .data  ${RELOCATING-0} :
 168   {
 169     ${RELOCATING+${DATA_START_SYMBOLS}}
 170     *(.data)
 171     ${RELOCATING+*(.data.*)}
 172     ${RELOCATING+*(.gnu.linkonce.d*)}
 173     ${CONSTRUCTING+CONSTRUCTORS}
 174   }
 175   .data1 ${RELOCATING-0} : { *(.data1) }
 176   ${RELOCATING+${OTHER_READWRITE_SECTIONS}}
 177
 178   .got1         ${RELOCATING-0} : { *(.got1) }
 179   .dynamic      ${RELOCATING-0} : { *(.dynamic) }
 180
 181   /* Put .ctors and .dtors next to the .got2 section, so that the pointers
 182      get relocated with -mrelocatable. Also put in the .fixup pointers.
 183      The current compiler no longer needs this, but keep it around for 2.7.2  */
 184
 185                 ${RELOCATING+PROVIDE (_GOT2_START_ = .);}
 186                 ${RELOCATING+PROVIDE (__GOT2_START_ = .);}
 187   .got2         ${RELOCATING-0} :  { *(.got2) }
 188
 189                 ${RELOCATING+PROVIDE (__CTOR_LIST__ = .);}
 190                 ${RELOCATING+PROVIDE (___CTOR_LIST__ = .);}
 191                 ${RELOCATING+${CTOR}}
 192                 ${RELOCATING+PROVIDE (__CTOR_END__ = .);}
 193                 ${RELOCATING+PROVIDE (___CTOR_END__ = .);}
 194
 195                 ${RELOCATING+PROVIDE (__DTOR_LIST__ = .);}
 196                 ${RELOCATING+PROVIDE (___DTOR_LIST__ = .);}
 197                 ${RELOCATING+${DTOR}}
 198                 ${RELOCATING+PROVIDE (__DTOR_END__ = .);}
 199                 ${RELOCATING+PROVIDE (___DTOR_END__ = .);}
 200
 201                 ${RELOCATING+PROVIDE (_FIXUP_START_ = .);}
 202                 ${RELOCATING+PROVIDE (__FIXUP_START_ = .);}
 203   .fixup        ${RELOCATING-0} : { *(.fixup) }
 204                 ${RELOCATING+PROVIDE (_FIXUP_END_ = .);}
 205                 ${RELOCATING+PROVIDE (__FIXUP_END_ = .);}
 206                 ${RELOCATING+PROVIDE (_GOT2_END_ = .);}
 207                 ${RELOCATING+PROVIDE (__GOT2_END_ = .);}
 208
 209                 ${RELOCATING+PROVIDE (_GOT_START_ = .);}
 210                 ${RELOCATING+PROVIDE (__GOT_START_ = .);}
 211   .got          ${RELOCATING-0} : { *(.got) }
 212   .got.plt      ${RELOCATING-0} : { *(.got.plt) }
 213   ${CREATE_SHLIB+${SDATA2}}
 214   ${CREATE_SHLIB+${SBSS2}}
 215                 ${RELOCATING+PROVIDE (_GOT_END_ = .);}
 216                 ${RELOCATING+PROVIDE (__GOT_END_ = .);}
 217
 218   /* We want the small data sections together, so single-instruction offsets
 219      can access them all, and initialized data all before uninitialized, so
 220      we can shorten the on-disk segment size.  */
 221   .sdata        ${RELOCATING-0} : { *(.sdata) }
 222   ${RELOCATING+_edata  =  .;}
 223   ${RELOCATING+PROVIDE (edata = .);}
 224   ${RELOCATING+PROVIDE (__edata = .);}
 225   .sbss    ${RELOCATING-0} :
 226   {
 227     ${RELOCATING+PROVIDE (__sbss_start = .);}
 228     ${RELOCATING+PROVIDE (___sbss_start = .);}
 229     *(.sbss)
 230     *(.scommon)
 231     *(.dynsbss)
 232     ${RELOCATING+PROVIDE (__sbss_end = .);}
 233     ${RELOCATING+PROVIDE (___sbss_end = .);}
 234   }
 235   ${PLT}
 236   .bss     ${RELOCATING-0} :
 237   {
 238    ${RELOCATING+${OTHER_BSS_SYMBOLS}}
 239    ${RELOCATING+PROVIDE (__bss_start = .);}
 240    ${RELOCATING+PROVIDE (___bss_start = .);}
 241    *(.dynbss)
 242    *(.bss)
 243    *(COMMON)
 244   }
 245   ${RELOCATING+_end = . ;}
 246   ${RELOCATING+PROVIDE (end = .);}
 247   ${RELOCATING+PROVIDE (__end = .);}
 248
 249   /* These are needed for ELF backends which have not yet been
 250      converted to the new style linker.  */
 251   .stab 0 : { *(.stab) }
 252   .stabstr 0 : { *(.stabstr) }
 253
 254   /* DWARF debug sections.
 255      Symbols in the DWARF debugging sections are relative to the beginning
 256      of the section so we begin them at 0.  */
 257
 258   /* DWARF 1 */
 259   .debug          0 : { *(.debug) }
 260   .line           0 : { *(.line) }
 261
 262   /* GNU DWARF 1 extensions */
 263   .debug_srcinfo  0 : { *(.debug_srcinfo) }
 264   .debug_sfnames  0 : { *(.debug_sfnames) }
 265
 266   /* DWARF 1.1 and DWARF 2 */
 267   .debug_aranges  0 : { *(.debug_aranges) }
 268   .debug_pubnames 0 : { *(.debug_pubnames) }
 269
 270   /* DWARF 2 */
 271   .debug_info     0 : { *(.debug_info) }
 272   .debug_abbrev   0 : { *(.debug_abbrev) }
 273   .debug_line     0 : { *(.debug_line) }
 274   .debug_frame    0 : { *(.debug_frame) }
 275   .debug_str      0 : { *(.debug_str) }
 276   .debug_loc      0 : { *(.debug_loc) }
 277   .debug_macinfo  0 : { *(.debug_macinfo) }
 278
 279   /* SGI/MIPS DWARF 2 extensions */
 280   .debug_weaknames 0 : { *(.debug_weaknames) }
 281   .debug_funcnames 0 : { *(.debug_funcnames) }
 282   .debug_typenames 0 : { *(.debug_typenames) }
 283   .debug_varnames  0 : { *(.debug_varnames) }
 284
 285   /* These must appear regardless of ${RELOCATING}.  */
 286   ${OTHER_SECTIONS}
 287 }
 288 EOF