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 .ctors .rodata ...
   6 #               (e.g., .PARISC.milli)
   7 #       OTHER_READWRITE_SECTIONS - other than .data .bss .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 INTERP=".interp   ${RELOCATING-0} : { *(.interp)        }"
  28 PLT=".plt    ${RELOCATING-0} : { *(.plt)        }"
  29 cat <<EOF
  30 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
  31               "${LITTLE_OUTPUT_FORMAT}")
  32 OUTPUT_ARCH(${ARCH})
  33 ENTRY(${ENTRY})
  34
  35 ${RELOCATING+${LIB_SEARCH_DIRS}}
  36 ${RELOCATING+/* Do we need any of these for elf?
  37    __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}}  */}
  38 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
  39 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
  40   if gld -r is used and the intermediate file has sections starting
  41   at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
  42   bug.  But for now assigning the zero vmas works.  */}
  43 SECTIONS
  44 {
  45   /* Read-only sections, merged into text segment: */
  46   ${CREATE_SHLIB-${RELOCATING+. = ${TEXT_START_ADDR} + SIZEOF_HEADERS;}}
  47   ${CREATE_SHLIB+${RELOCATING+. = SIZEOF_HEADERS;}}
  48   ${CREATE_SHLIB-${INTERP}}
  49   .hash         ${RELOCATING-0} : { *(.hash)            }
  50   .dynsym       ${RELOCATING-0} : { *(.dynsym)          }
  51   .dynstr       ${RELOCATING-0} : { *(.dynstr)          }
  52   .rela.text    ${RELOCATING-0} : { *(.rela.text)       }
  53   .rela.data    ${RELOCATING-0} : { *(.rela.data)       }
  54   .rela.rodata  ${RELOCATING-0} : { *(.rela.rodata)     }
  55   .rela.got     ${RELOCATING-0} : { *(.rela.got)        }
  56   .rela.got1    ${RELOCATING-0} : { *(.rela.got1)       }
  57   .rela.got2    ${RELOCATING-0} : { *(.rela.got2)       }
  58   .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors)      }
  59   .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors)      }
  60   .rela.init    ${RELOCATING-0} : { *(.rela.init)       }
  61   .rela.fini    ${RELOCATING-0} : { *(.rela.fini)       }
  62   .rela.bss     ${RELOCATING-0} : { *(.rela.bss)        }
  63   .rela.plt     ${RELOCATING-0} : { *(.rela.plt)        }
  64   .init         ${RELOCATING-0} : { *(.init)    } =${NOP-0}
  65   ${DATA_PLT-${PLT}}
  66   .text    ${RELOCATING-0} :
  67   {
  68     ${RELOCATING+${TEXT_START_SYMBOLS}}
  69     *(.text)
  70     /* .gnu.warning sections are handled specially by elf32.em.  */
  71     *(.gnu.warning)
  72   } =${NOP-0}
  73   ${RELOCATING+_etext = .;}
  74   ${RELOCATING+PROVIDE (etext = .);}
  75   .fini    ${RELOCATING-0} : { *(.fini)    } =${NOP-0}
  76   .rodata  ${RELOCATING-0} : { *(.rodata)  }
  77   .rodata1 ${RELOCATING-0} : { *(.rodata1) }
  78   ${RELOCATING+${OTHER_READONLY_SECTIONS}}
  79
  80   /* Read-write section, merged into data segment: */
  81   ${RELOCATING+. = ${DATA_ADDR- ALIGN(8) + ${MAXPAGESIZE}};}
  82   .data  ${RELOCATING-0} :
  83   {
  84     ${RELOCATING+${DATA_START_SYMBOLS}}
  85     *(.data)
  86     ${CONSTRUCTING+CONSTRUCTORS}
  87   }
  88   .data1 ${RELOCATING-0} : { *(.data1) }
  89   ${RELOCATING+${OTHER_READWRITE_SECTIONS}}
  90
  91   .sdata2       ${RELOCATING-0} : { *(.sdata2) }
  92   .sbss2        ${RELOCATING-0} : { *(.sbss2) }
  93   .got1         ${RELOCATING-0} : { *(.got1) }
  94   .dynamic      ${RELOCATING-0} : { *(.dynamic) }
  95
  96   /* Put .ctors and .dtors next to the .got2 section, so that the pointers
  97      get relocated with -mrelocatable. Also put in the .fixup pointers.
  98      The current compiler no longer needs this, but keep it around for 2.7.2  */
  99
 100                 ${RELOCATING+PROVIDE (_GOT2_START_ = .);}
 101   .got2         ${RELOCATING-0} :  { *(.got2) }
 102
 103                 ${RELOCATING+PROVIDE (__CTOR_LIST__ = .);}
 104   .ctors        ${RELOCATING-0} : { *(.ctors) }
 105                 ${RELOCATING+PROVIDE (__CTOR_END__ = .);}
 106
 107                 ${RELOCATING+PROVIDE (__DTOR_LIST__ = .);}
 108   .dtors        ${RELOCATING-0} : { *(.dtors) }
 109                 ${RELOCATING+PROVIDE (__DTOR_END__ = .);}
 110
 111                 ${RELOCATING+PROVIDE (_FIXUP_START_ = .);}
 112   .fixup        ${RELOCATING-0} : { *(.fixup) }
 113                 ${RELOCATING+PROVIDE (_FIXUP_END_ = .);}
 114                 ${RELOCATING+PROVIDE (_GOT2_END_ = .);}
 115
 116                 ${RELOCATING+PROVIDE (_GOT_START_ = .);}
 117                 ${RELOCATING+PROVIDE (_GLOBAL_OFFSET_TABLE_ = .);}
 118   .got          ${RELOCATING-0} : { *(.got) }
 119   .got.plt      ${RELOCATING-0} : { *(.got.plt) }
 120                 ${RELOCATING+PROVIDE (_GOT_END_ = .);}
 121
 122   ${DATA_PLT+${PLT}}
 123
 124   /* We want the small data sections together, so single-instruction offsets
 125      can access them all, and initialized data all before uninitialized, so
 126      we can shorten the on-disk segment size.  */
 127   .sdata        ${RELOCATING-0} : { *(.sdata) }
 128   ${RELOCATING+_edata  =  .;}
 129   ${RELOCATING+PROVIDE (edata = .);}
 130   .sbss    ${RELOCATING-0} :
 131   {
 132     ${RELOCATING+PROVIDE (__sbss_start = .);}
 133     *(.sbss)
 134     *(.scommon)
 135     ${RELOCATING+PROVIDE (__sbss_end = .);}
 136   }
 137   .bss     ${RELOCATING-0} :
 138   {
 139    ${RELOCATING+${OTHER_BSS_SYMBOLS}}
 140    ${RELOCATING+PROVIDE (__bss_start = .);}
 141    *(.dynbss)
 142    *(.bss)
 143    *(COMMON)
 144   }
 145   ${RELOCATING+_end = . ;}
 146   ${RELOCATING+PROVIDE (end = .);}
 147
 148   /* These are needed for ELF backends which have not yet been
 149      converted to the new style linker.  */
 150   .stab 0 : { *(.stab) }
 151   .stabstr 0 : { *(.stabstr) }
 152
 153   /* These must appear regardless of ${RELOCATING}.  */
 154   ${OTHER_SECTIONS}
 155 }
 156 EOF