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