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 #       DATA_PLT - .plt should be in data segment, not text segment.
  19 #
  20 # When adding sections, do note that the names of some sections are used
  21 # when specifying the start address of the next.
  22 #
  23 test -z "$ENTRY" && ENTRY=_start
  24 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  25 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  26 test "$LD_FLAG" = "N" && DATA_ADDR=.
  27 SBSS2=".sbss2 ${RELOCATING-0} : { *(.sbss2) }"
  28 SDATA2=".sdata2 ${RELOCATING-0} : { *(.sdata2) }"
  29 INTERP=".interp ${RELOCATING-0} : { *(.interp) }"
  30 PLT=".plt ${RELOCATING-0} : { *(.plt) }"
  31 cat <<EOF
  32 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
  33               "${LITTLE_OUTPUT_FORMAT}")
  34 OUTPUT_ARCH(${ARCH})
  35 ENTRY(${ENTRY})
  36
  37 ${RELOCATING+${LIB_SEARCH_DIRS}}
  38 ${RELOCATING+/* Do we need any of these for elf?
  39    __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}}  */}
  40 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
  41 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
  42   if gld -r is used and the intermediate file has sections starting
  43   at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
  44   bug.  But for now assigning the zero vmas works.  */}
  45 SECTIONS
  46 {
  47   /* Read-only sections, merged into text segment: */
  48   ${CREATE_SHLIB-${RELOCATING+. = ${TEXT_START_ADDR} + SIZEOF_HEADERS;}}
  49   ${CREATE_SHLIB+${RELOCATING+. = SIZEOF_HEADERS;}}
  50   ${CREATE_SHLIB-${INTERP}}
  51   .hash         ${RELOCATING-0} : { *(.hash)            }
  52   .dynsym       ${RELOCATING-0} : { *(.dynsym)          }
  53   .dynstr       ${RELOCATING-0} : { *(.dynstr)          }
  54   .rela.text    ${RELOCATING-0} : { *(.rela.text)       }
  55   .rela.data    ${RELOCATING-0} : { *(.rela.data)       }
  56   .rela.rodata  ${RELOCATING-0} : { *(.rela.rodata)     }
  57   .rela.got     ${RELOCATING-0} : { *(.rela.got)        }
  58   .rela.got1    ${RELOCATING-0} : { *(.rela.got1)       }
  59   .rela.got2    ${RELOCATING-0} : { *(.rela.got2)       }
  60   .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors)      }
  61   .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors)      }
  62   .rela.init    ${RELOCATING-0} : { *(.rela.init)       }
  63   .rela.fini    ${RELOCATING-0} : { *(.rela.fini)       }
  64   .rela.bss     ${RELOCATING-0} : { *(.rela.bss)        }
  65   .rela.plt     ${RELOCATING-0} : { *(.rela.plt)        }
  66   .rela.sdata   ${RELOCATING-0} : { *(.rela.sdata2)     }
  67   .rela.sbss    ${RELOCATING-0} : { *(.rela.sbss2)      }
  68   .rela.sdata2  ${RELOCATING-0} : { *(.rela.sdata2)     }
  69   .rela.sbss2   ${RELOCATING-0} : { *(.rela.sbss2)      }
  70   ${DATA_PLT-${PLT}}
  71   .text    ${RELOCATING-0} :
  72   {
  73     ${RELOCATING+${TEXT_START_SYMBOLS}}
  74     *(.text)
  75     /* .gnu.warning sections are handled specially by elf32.em.  */
  76     *(.gnu.warning)
  77   } =${NOP-0}
  78   .init         ${RELOCATING-0} : { *(.init)            } =${NOP-0}
  79   .fini         ${RELOCATING-0} : { *(.fini)            } =${NOP-0}
  80   .rodata       ${RELOCATING-0} : { *(.rodata)  }
  81   .rodata1      ${RELOCATING-0} : { *(.rodata1) }
  82   ${RELOCATING+_etext = .;}
  83   ${RELOCATING+PROVIDE (etext = .);}
  84   ${CREATE_SHLIB-${SDATA2}}
  85   ${CREATE_SHLIB-${SBSS2}}
  86   ${RELOCATING+${OTHER_READONLY_SECTIONS}}
  87
  88   /* Adjust the address for the data segment.  We want to adjust up to
  89      the same address within the page on the next page up.  It would
  90      be more correct to do this:
  91        ${RELOCATING+. = ${DATA_ADDR-ALIGN(${MAXPAGESIZE}) + (ALIGN(8) & (${MAXPAGESIZE} - 1))};}
  92      The current expression does not correctly handle the case of a
  93      text segment ending precisely at the end of a page; it causes the
  94      data segment to skip a page.  The above expression does not have
  95      this problem, but it will currently (2/95) cause BFD to allocate
  96      a single segment, combining both text and data, for this case.
  97      This will prevent the text segment from being shared among
  98      multiple executions of the program; I think that is more
  99      important than losing a page of the virtual address space (note
 100      that no actual memory is lost; the page which is skipped can not
 101      be referenced).  */
 102   ${RELOCATING+. = ${DATA_ADDR- ALIGN(8) + ${MAXPAGESIZE}};}
 103
 104   .data  ${RELOCATING-0} :
 105   {
 106     ${RELOCATING+${DATA_START_SYMBOLS}}
 107     *(.data)
 108     ${CONSTRUCTING+CONSTRUCTORS}
 109   }
 110   .data1 ${RELOCATING-0} : { *(.data1) }
 111   ${RELOCATING+${OTHER_READWRITE_SECTIONS}}
 112
 113   .got1         ${RELOCATING-0} : { *(.got1) }
 114   .dynamic      ${RELOCATING-0} : { *(.dynamic) }
 115
 116   /* Put .ctors and .dtors next to the .got2 section, so that the pointers
 117      get relocated with -mrelocatable. Also put in the .fixup pointers.
 118      The current compiler no longer needs this, but keep it around for 2.7.2  */
 119
 120                 ${RELOCATING+PROVIDE (_GOT2_START_ = .);}
 121   .got2         ${RELOCATING-0} :  { *(.got2) }
 122
 123                 ${RELOCATING+PROVIDE (__CTOR_LIST__ = .);}
 124   .ctors        ${RELOCATING-0} : { *(.ctors) }
 125                 ${RELOCATING+PROVIDE (__CTOR_END__ = .);}
 126
 127                 ${RELOCATING+PROVIDE (__DTOR_LIST__ = .);}
 128   .dtors        ${RELOCATING-0} : { *(.dtors) }
 129                 ${RELOCATING+PROVIDE (__DTOR_END__ = .);}
 130
 131                 ${RELOCATING+PROVIDE (_FIXUP_START_ = .);}
 132   .fixup        ${RELOCATING-0} : { *(.fixup) }
 133                 ${RELOCATING+PROVIDE (_FIXUP_END_ = .);}
 134                 ${RELOCATING+PROVIDE (_GOT2_END_ = .);}
 135
 136                 ${RELOCATING+PROVIDE (_GOT_START_ = .);}
 137                 ${RELOCATING+PROVIDE (_GLOBAL_OFFSET_TABLE_ = .);}
 138   .got          ${RELOCATING-0} : { *(.got) }
 139   .got.plt      ${RELOCATING-0} : { *(.got.plt) }
 140   ${CREATE_SHLIB+${SDATA2}}
 141   ${CREATE_SHLIB+${SBSS2}}
 142                 ${RELOCATING+PROVIDE (_GOT_END_ = .);}
 143
 144   ${DATA_PLT+${PLT}}
 145   /* We want the small data sections together, so single-instruction offsets
 146      can access them all, and initialized data all before uninitialized, so
 147      we can shorten the on-disk segment size.  */
 148   .sdata        ${RELOCATING-0} : { *(.sdata) }
 149   ${RELOCATING+_edata  =  .;}
 150   ${RELOCATING+PROVIDE (edata = .);}
 151   .sbss    ${RELOCATING-0} :
 152   {
 153     ${RELOCATING+PROVIDE (__sbss_start = .);}
 154     *(.sbss)
 155     *(.scommon)
 156     ${RELOCATING+PROVIDE (__sbss_end = .);}
 157   }
 158   .bss     ${RELOCATING-0} :
 159   {
 160    ${RELOCATING+${OTHER_BSS_SYMBOLS}}
 161    ${RELOCATING+PROVIDE (__bss_start = .);}
 162    *(.dynbss)
 163    *(.bss)
 164    *(COMMON)
 165   }
 166   ${RELOCATING+_end = . ;}
 167   ${RELOCATING+PROVIDE (end = .);}
 168
 169   /* These are needed for ELF backends which have not yet been
 170      converted to the new style linker.  */
 171   .stab 0 : { *(.stab) }
 172   .stabstr 0 : { *(.stabstr) }
 173
 174   /* DWARF debug sections.
 175      Symbols in the .debug DWARF section are relative to the beginning of the
 176      section so we begin .debug at 0.  It's not clear yet what needs to happen
 177      for the others.   */
 178   .debug          0 : { *(.debug) }
 179   .debug_srcinfo  0 : { *(.debug_srcinfo) }
 180   .debug_aranges  0 : { *(.debug_aranges) }
 181   .debug_pubnames 0 : { *(.debug_pubnames) }
 182   .debug_sfnames  0 : { *(.debug_sfnames) }
 183   .line           0 : { *(.line) }
 184
 185   /* These must appear regardless of ${RELOCATING}.  */
 186   ${OTHER_SECTIONS}
 187 }
 188 EOF