ld/scripttempl/mmo.sc

   1 # Copyright (C) 2014-2022 Free Software Foundation, Inc.
   2 #
   3 # Copying and distribution of this file, with or without modification,
   4 # are permitted in any medium without royalty provided the copyright
   5 # notice and this notice are preserved.
   6
   7 # MMO is not a relocateable format, and we don't want to require an
   8 # explicit (e.g.) "-m elf64mmix" when -r is used.
   9
  10 test -z $RELOCATEABLE_OUTPUT_FORMAT && RELOCATEABLE_OUTPUT_FORMAT=$OUTPUT_FORMAT
  11 test -z ${RELOCATING+0} && OUTPUT_FORMAT=$RELOCATEABLE_OUTPUT_FORMAT
  12
  13 cat <<EOF
  14 /* Copyright (C) 2014-2022 Free Software Foundation, Inc.
  15
  16    Copying and distribution of this script, with or without modification,
  17    are permitted in any medium without royalty provided the copyright
  18    notice and this notice are preserved.  */
  19
  20 OUTPUT_FORMAT("$OUTPUT_FORMAT")
  21 OUTPUT_ARCH(mmix)
  22 ${RELOCATING+ENTRY(Main)}
  23 SECTIONS
  24 {
  25   .text ${RELOCATING+ ${TEXT_START_ADDR}}:
  26   {
  27     /* FIXME: Move .init, .fini, .ctors and .dtors to their own sections.  */
  28     ${RELOCATING+ PROVIDE (_init_start = .);}
  29     ${RELOCATING+ PROVIDE (_init = .);}
  30     ${RELOCATING+ KEEP (*(SORT_NONE(.init)))}
  31     ${RELOCATING+ PROVIDE (_init_end = .);}
  32
  33     *(.text)
  34     ${RELOCATING+*(.text.*)}
  35     ${RELOCATING+*(.gnu.linkonce.t*)}
  36     ${RELOCATING+*(.rodata)}
  37     ${RELOCATING+*(.rodata.*)}
  38     ${RELOCATING+*(.gnu.linkonce.r*)}
  39
  40     ${RELOCATING+ PROVIDE (_fini_start = .);}
  41     ${RELOCATING+ PROVIDE (_fini = .);}
  42     ${RELOCATING+ KEEP (*(SORT_NONE(.fini)))}
  43     ${RELOCATING+ PROVIDE (_fini_end = .);}
  44
  45     /* FIXME: Align ctors, dtors, ehframe.  */
  46     ${RELOCATING+ PROVIDE (_ctors_start = .);}
  47     ${RELOCATING+ PROVIDE (__ctors_start = .);}
  48     ${RELOCATING+ PROVIDE (_ctors = .);}
  49     ${RELOCATING+ PROVIDE (__ctors = .);}
  50     ${RELOCATING+ KEEP (*crtbegin.o(.ctors))}
  51     ${RELOCATING+ KEEP (*crtbegin?.o(.ctors))}
  52     ${RELOCATING+ KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .ctors))}
  53     ${RELOCATING+ KEEP (*(SORT(.ctors.*)))}
  54     ${RELOCATING+ KEEP (*(.ctors))}
  55     ${RELOCATING+ PROVIDE (_ctors_end = .);}
  56     ${RELOCATING+ PROVIDE (__ctors_end = .);}
  57
  58     ${RELOCATING+ PROVIDE (_dtors_start = .);}
  59     ${RELOCATING+ PROVIDE (__dtors_start = .);}
  60     ${RELOCATING+ PROVIDE (_dtors = .);}
  61     ${RELOCATING+ PROVIDE (__dtors = .);}
  62     ${RELOCATING+ KEEP (*crtbegin.o(.dtors))}
  63     ${RELOCATING+ KEEP (*crtbegin?.o(.dtors))}
  64     ${RELOCATING+ KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .dtors))}
  65     ${RELOCATING+ KEEP (*(SORT(.dtors.*)))}
  66     ${RELOCATING+ KEEP (*(.dtors))}
  67     ${RELOCATING+ PROVIDE (_dtors_end = .);}
  68     ${RELOCATING+ PROVIDE (__dtors_end = .);}
  69
  70     ${RELOCATING+KEEP (*(.jcr))}
  71     ${RELOCATING+KEEP (*(.eh_frame))}
  72     ${RELOCATING+*(.gcc_except_table)}
  73
  74     ${RELOCATING+Main = DEFINED (Main) ? Main : (DEFINED (_start) ? _start : ADDR (.text));}
  75   }
  76
  77   /* The following NOP assignment and those after .data and .bss, are
  78      necessary to get orphan sections adopted by the .text inserted before
  79      the following end-section symbols.  An output section would also serve
  80      this purpose, but we can't do that.  */
  81   . = .;
  82   ${RELOCATING+ PROVIDE(etext = .);}
  83   ${RELOCATING+ PROVIDE(_etext = .);}
  84   ${RELOCATING+ PROVIDE(__etext = .);}
  85
  86   .data ${RELOCATING+ ${DATA_ADDR}}:
  87   {
  88     ${RELOCATING+ PROVIDE(__Sdata = .);}
  89
  90     *(.data);
  91     ${RELOCATING+*(.data.*)}
  92     ${RELOCATING+*(.gnu.linkonce.d*)}
  93   }
  94   . = .;
  95   ${RELOCATING+ PROVIDE(__Edata = .);}
  96   /* Deprecated, use __Edata.  */
  97   ${RELOCATING+ PROVIDE(edata = .);}
  98   ${RELOCATING+ PROVIDE(_edata = .);}
  99   ${RELOCATING+ PROVIDE(__edata = .);}
 100
 101   /* At the moment, although perhaps we should, we can't map sections
 102      without contents to sections *with* contents due to FIXME: a BFD bug.
 103      Anyway, the mmo back-end ignores sections without contents when
 104      writing out sections, so this works fine.   */
 105   .bss :
 106   {
 107     ${RELOCATING+ PROVIDE(__Sbss = .);}
 108     ${RELOCATING+ PROVIDE(__bss_start = .);}
 109     ${RELOCATING+ *(.sbss);}
 110     ${RELOCATING+ *(.bss);}
 111     ${RELOCATING+*(.bss.*)}
 112     ${RELOCATING+ *(COMMON);}
 113   }
 114   . = .;
 115   ${RELOCATING+ PROVIDE(__Ebss = .);}
 116
 117   /* Deprecated, use __Ebss or __Eall as appropriate.  */
 118   ${RELOCATING+ PROVIDE(end = .);}
 119   ${RELOCATING+ PROVIDE(_end = .);}
 120   ${RELOCATING+ PROVIDE(__end = .);}
 121   ${RELOCATING+ PROVIDE(__Eall = .);}
 122
 123   .stab 0 : { *(.stab) }
 124   .stabstr 0 : { *(.stabstr) }
 125   .stab.excl 0 : { *(.stab.excl) }
 126   .stab.exclstr 0 : { *(.stab.exclstr) }
 127   .stab.index 0 : { *(.stab.index) }
 128   .stab.indexstr 0 : { *(.stab.indexstr) }
 129 EOF
 130
 131 . $srcdir/scripttempl/DWARF.sc
 132
 133 cat <<EOF
 134   .MMIX.reg_contents :
 135   {
 136     /* Note that this section always has a fixed VMA - that of its
 137        first register * 8.  */
 138     *(.MMIX.reg_contents.linker_allocated);
 139     *(.MMIX.reg_contents);
 140   }
 141
 142   ${RELOCATING+/* By default, put the high end of the stack where the register stack
 143      begins.  They grow in opposite directions.  */
 144   PROVIDE (__Stack_start = 0x6000000000000000);}
 145
 146   /* Unfortunately, stabs are not mappable from ELF to MMO.
 147      It can probably be fixed with some amount of work.  */
 148   /DISCARD/ :
 149   { ${RELOCATING+ *(.gnu.warning.*);} }
 150
 151   .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
 152 }
 153 EOF