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     { *(.rela.text) *(.rela.gnu.linkonce.t*) }
  60   .rela.data   ${RELOCATING-0} :
  61     { *(.rela.data) *(.rela.gnu.linkonce.d*) }
  62   .rela.rodata ${RELOCATING-0} :
  63     { *(.rela.rodata) *(.rela.gnu.linkonce.r*) }
  64   .rela.got     ${RELOCATING-0} : { *(.rela.got)        }
  65   .rela.got1    ${RELOCATING-0} : { *(.rela.got1)       }
  66   .rela.got2    ${RELOCATING-0} : { *(.rela.got2)       }
  67   .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors)      }
  68   .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors)      }
  69   .rela.init    ${RELOCATING-0} : { *(.rela.init)       }
  70   .rela.fini    ${RELOCATING-0} : { *(.rela.fini)       }
  71   .rela.bss     ${RELOCATING-0} : { *(.rela.bss)        }
  72   .rela.plt     ${RELOCATING-0} : { *(.rela.plt)        }
  73   .rela.sdata   ${RELOCATING-0} : { *(.rela.sdata)      }
  74   .rela.sbss    ${RELOCATING-0} : { *(.rela.sbss)       }
  75   .rela.sdata2  ${RELOCATING-0} : { *(.rela.sdata2)     }
  76   .rela.sbss2   ${RELOCATING-0} : { *(.rela.sbss2)      }
  77   .text    ${RELOCATING-0} :
  78   {
  79     ${RELOCATING+${TEXT_START_SYMBOLS}}
  80     *(.text)
  81     /* .gnu.warning sections are handled specially by elf32.em.  */
  82     *(.gnu.warning)
  83     *(.gnu.linkonce.t*)
  84   } =${NOP-0}
  85   .init         ${RELOCATING-0} : { *(.init)            } =${NOP-0}
  86   .fini         ${RELOCATING-0} : { *(.fini)            } =${NOP-0}
  87   .rodata       ${RELOCATING-0} : { *(.rodata) *(.gnu.linkonce.r*) }
  88   .rodata1      ${RELOCATING-0} : { *(.rodata1) }
  89   ${RELOCATING+_etext = .;}
  90   ${RELOCATING+PROVIDE (etext = .);}
  91   ${CREATE_SHLIB-${SDATA2}}
  92   ${CREATE_SHLIB-${SBSS2}}
  93   ${RELOCATING+${OTHER_READONLY_SECTIONS}}
  94
  95   /* Adjust the address for the data segment.  We want to adjust up to
  96      the same address within the page on the next page up.  It would
  97      be more correct to do this:
  98        ${RELOCATING+. = ${DATA_ADDR-ALIGN(${MAXPAGESIZE}) + (ALIGN(8) & (${MAXPAGESIZE} - 1))};}
  99      The current expression does not correctly handle the case of a
 100      text segment ending precisely at the end of a page; it causes the
 101      data segment to skip a page.  The above expression does not have
 102      this problem, but it will currently (2/95) cause BFD to allocate
 103      a single segment, combining both text and data, for this case.
 104      This will prevent the text segment from being shared among
 105      multiple executions of the program; I think that is more
 106      important than losing a page of the virtual address space (note
 107      that no actual memory is lost; the page which is skipped can not
 108      be referenced).  */
 109   ${RELOCATING+. = ${DATA_ADDR- ALIGN(8) + ${MAXPAGESIZE}};}
 110
 111   .data  ${RELOCATING-0} :
 112   {
 113     ${RELOCATING+${DATA_START_SYMBOLS}}
 114     *(.data)
 115     *(.gnu.linkonce.d*)
 116     ${CONSTRUCTING+CONSTRUCTORS}
 117   }
 118   .data1 ${RELOCATING-0} : { *(.data1) }
 119   ${RELOCATING+${OTHER_READWRITE_SECTIONS}}
 120
 121   .got1         ${RELOCATING-0} : { *(.got1) }
 122   .dynamic      ${RELOCATING-0} : { *(.dynamic) }
 123
 124   /* Put .ctors and .dtors next to the .got2 section, so that the pointers
 125      get relocated with -mrelocatable. Also put in the .fixup pointers.
 126      The current compiler no longer needs this, but keep it around for 2.7.2  */
 127
 128                 ${RELOCATING+PROVIDE (_GOT2_START_ = .);}
 129   .got2         ${RELOCATING-0} :  { *(.got2) }
 130
 131                 ${RELOCATING+PROVIDE (__CTOR_LIST__ = .);}
 132   .ctors        ${RELOCATING-0} : { *(.ctors) }
 133                 ${RELOCATING+PROVIDE (__CTOR_END__ = .);}
 134
 135                 ${RELOCATING+PROVIDE (__DTOR_LIST__ = .);}
 136   .dtors        ${RELOCATING-0} : { *(.dtors) }
 137                 ${RELOCATING+PROVIDE (__DTOR_END__ = .);}
 138
 139                 ${RELOCATING+PROVIDE (_FIXUP_START_ = .);}
 140   .fixup        ${RELOCATING-0} : { *(.fixup) }
 141                 ${RELOCATING+PROVIDE (_FIXUP_END_ = .);}
 142                 ${RELOCATING+PROVIDE (_GOT2_END_ = .);}
 143
 144                 ${RELOCATING+PROVIDE (_GOT_START_ = .);}
 145   .got          ${RELOCATING-0} : { *(.got) }
 146   .got.plt      ${RELOCATING-0} : { *(.got.plt) }
 147   ${CREATE_SHLIB+${SDATA2}}
 148   ${CREATE_SHLIB+${SBSS2}}
 149                 ${RELOCATING+PROVIDE (_GOT_END_ = .);}
 150
 151   /* We want the small data sections together, so single-instruction offsets
 152      can access them all, and initialized data all before uninitialized, so
 153      we can shorten the on-disk segment size.  */
 154   .sdata        ${RELOCATING-0} : { *(.sdata) }
 155   ${RELOCATING+_edata  =  .;}
 156   ${RELOCATING+PROVIDE (edata = .);}
 157   .sbss    ${RELOCATING-0} :
 158   {
 159     ${RELOCATING+PROVIDE (__sbss_start = .);}
 160     *(.sbss)
 161     *(.scommon)
 162     ${RELOCATING+PROVIDE (__sbss_end = .);}
 163   }
 164   ${PLT}
 165   .bss     ${RELOCATING-0} :
 166   {
 167    ${RELOCATING+${OTHER_BSS_SYMBOLS}}
 168    ${RELOCATING+PROVIDE (__bss_start = .);}
 169    *(.dynbss)
 170    *(.bss)
 171    *(COMMON)
 172   }
 173   ${RELOCATING+_end = . ;}
 174   ${RELOCATING+PROVIDE (end = .);}
 175
 176   /* These are needed for ELF backends which have not yet been
 177      converted to the new style linker.  */
 178   .stab 0 : { *(.stab) }
 179   .stabstr 0 : { *(.stabstr) }
 180
 181   /* DWARF debug sections.
 182      Symbols in the DWARF debugging sections are relative to the beginning
 183      of the section so we begin them at 0.  */
 184
 185   /* DWARF 1 */
 186   .debug          0 : { *(.debug) }
 187   .line           0 : { *(.line) }
 188
 189   /* GNU DWARF 1 extensions */
 190   .debug_srcinfo  0 : { *(.debug_srcinfo) }
 191   .debug_sfnames  0 : { *(.debug_sfnames) }
 192
 193   /* DWARF 1.1 and DWARF 2 */
 194   .debug_aranges  0 : { *(.debug_aranges) }
 195   .debug_pubnames 0 : { *(.debug_pubnames) }
 196
 197   /* DWARF 2 */
 198   .debug_info     0 : { *(.debug_info) }
 199   .debug_abbrev   0 : { *(.debug_abbrev) }
 200   .debug_line     0 : { *(.debug_line) }
 201   .debug_frame    0 : { *(.debug_frame) }
 202   .debug_str      0 : { *(.debug_str) }
 203   .debug_loc      0 : { *(.debug_loc) }
 204   .debug_macinfo  0 : { *(.debug_macinfo) }
 205
 206   /* SGI/MIPS DWARF 2 extensions */
 207   .debug_weaknames 0 : { *(.debug_weaknames) }
 208   .debug_funcnames 0 : { *(.debug_funcnames) }
 209   .debug_typenames 0 : { *(.debug_typenames) }
 210   .debug_varnames  0 : { *(.debug_varnames) }
 211
 212   /* These must appear regardless of ${RELOCATING}.  */
 213   ${OTHER_SECTIONS}
 214 }
 215 EOF