ld/scripttempl/visium.sc

   1 # Copyright (C) 2014-2024 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 #  Many sections come in three flavours.  There is the 'real' section,
   8 #  like ".data".  Then there are the per-procedure or per-variable
   9 #  sections, generated by -ffunction-sections and -fdata-sections in GCC,
  10 #  and useful for --gc-sections, which for a variable "foo" might be
  11 #  ".data.foo".  Then there are the linkonce sections, for which the linker
  12 #  eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
  13 #  The exact correspondences are:
  14 #
  15 #  Section      Linkonce section
  16 #  .text        .gnu.linkonce.t.foo
  17 #  .rodata      .gnu.linkonce.r.foo
  18 #  .data        .gnu.linkonce.d.foo
  19 #  .bss         .gnu.linkonce.b.foo
  20 #  .sdata       .gnu.linkonce.s.foo
  21 #  .sbss        .gnu.linkonce.sb.foo
  22 #  .sdata2      .gnu.linkonce.s2.foo
  23 #  .sbss2       .gnu.linkonce.sb2.foo
  24 #  .debug_info  .gnu.linkonce.wi.foo
  25 #  .tdata       .gnu.linkonce.td.foo
  26 #  .tbss        .gnu.linkonce.tb.foo
  27 #  .lrodata     .gnu.linkonce.lr.foo
  28 #  .ldata       .gnu.linkonce.l.foo
  29 #  .lbss        .gnu.linkonce.lb.foo
  30 #
  31 #  Each of these can also have corresponding .rel.* and .rela.* sections.
  32
  33 test -z "$ENTRY" && ENTRY=__start
  34 cat <<EOF
  35 OUTPUT_FORMAT("${OUTPUT_FORMAT}")
  36
  37 ENTRY(${ENTRY})
  38 EOF
  39
  40 test -n "${RELOCATING}" && cat <<EOF
  41 /* Start and end of main stack. Assumes 256K of RAM.  */
  42 _estack = 0xe0040000 - 4;
  43 _sstack = 0xe0040000 - 64K;
  44
  45 /* End of heap.  */
  46 _eheap = _sstack - 4;
  47
  48 MEMORY
  49 {
  50   init    : ORIGIN = 0x00000000, LENGTH = 0x0003fffc
  51   scr     : ORIGIN = 0x0003fffc, LENGTH = 0x00000004
  52   rom     : ORIGIN = 0x00044000, LENGTH = 0x1ffbc000
  53   ram     : ORIGIN = 0xe0000000, LENGTH = 0x10000000
  54   saferam : ORIGIN = 0xf0000000, LENGTH = 0x10000000
  55 }
  56
  57 EOF
  58
  59 cat <<EOF
  60 SECTIONS
  61 {
  62   .init ${RELOCATING-0} : {
  63     KEEP (*(SORT_NONE(.init)))
  64     ${RELOCATING+KEEP (*(SORT_NONE(.fini)))}
  65     ${RELOCATING+ _einit  =  .;}
  66   } ${RELOCATING+ > init}
  67
  68   .text ${RELOCATING-0} : {
  69     ${RELOCATING+ _ftext  =  .;}
  70     *(.text)
  71     ${RELOCATING+*(.text.*)}
  72     ${RELOCATING+*(.gnu.linkonce.t.*)}
  73     ${RELOCATING+ _etext  =  .;}
  74   } ${RELOCATING+ > rom}
  75
  76   .ctors ${RELOCATING-0} : {
  77     ${CONSTRUCTING+ . = ALIGN(4);}
  78     ${CONSTRUCTING+ __CTOR_LIST__ = .;}
  79     /* gcc uses crtbegin.o to find the start of
  80        the constructors, so we make sure it is
  81        first.  Because this is a wildcard, it
  82        doesn't matter if the user does not
  83        actually link against crtbegin.o; the
  84        linker won't look for a file to match a
  85        wildcard.  The wildcard also means that it
  86        doesn't matter which directory crtbegin.o
  87        is in.  */
  88
  89     KEEP (*crtbegin*.o(.ctors))
  90
  91     /* We don't want to include the .ctor section from
  92        from the crtend.o file until after the sorted ctors.
  93        The .ctor section from the crtend file contains the
  94        end of ctors marker and it must be last.  */
  95
  96     KEEP (*(EXCLUDE_FILE (*crtend*.o) .ctors))
  97     ${RELOCATING+KEEP (*(SORT(.ctors.*)))}
  98     KEEP (*(.ctors))
  99     ${CONSTRUCTING+ __CTOR_END__ = .;}
 100   } ${RELOCATING+ > rom}
 101
 102   .dtors ${RELOCATING-0} : {
 103     ${CONSTRUCTING+ __DTOR_LIST__ = .;}
 104     KEEP (*crtbegin*.o(.dtors))
 105     KEEP (*(EXCLUDE_FILE (*crtend*.o) .dtors))
 106     ${RELOCATING+KEEP (*(SORT(.dtors.*)))}
 107     KEEP (*(.dtors))
 108     ${CONSTRUCTING+ __DTOR_END__ = .;}
 109   } ${RELOCATING+ > rom}
 110   .rodata ${RELOCATING-0} : {
 111     ${RELOCATING+ . = ALIGN(4);}
 112     ${RELOCATING+ _srdata  =  .;}
 113     ${RELOCATING+*(.rdata)}
 114     *(.rodata)
 115     ${RELOCATING+*(.rodata.*)}
 116     ${RELOCATING+*(.gnu.linkonce.r.*)}
 117     ${RELOCATING+ . = ALIGN(4);}
 118     ${RELOCATING+ _erdata  =  .;}
 119   } ${RELOCATING+ > rom}
 120
 121   .eh_frame ${RELOCATING-0} :
 122   {
 123     ${RELOCATING+PROVIDE (__eh_frame_begin = .);}
 124     *(.eh_frame)
 125     ${RELOCATING+ LONG (0);}
 126     ${RELOCATING+PROVIDE (__eh_frame_end = .);}
 127   } ${RELOCATING+ > rom}
 128   .gcc_except_table ${RELOCATING-0} : { *(.gcc_except_table) } ${RELOCATING+ > rom}
 129   .jcr ${RELOCATING-0} : { *(.jcr) } ${RELOCATING+ > rom}
 130
 131   .data ${RELOCATING-0} : {
 132     ${RELOCATING+ . = ALIGN(4);}
 133     ${RELOCATING+ _sdata  =  .;}
 134     *(.data)
 135     ${RELOCATING+*(.data.*)}
 136     ${RELOCATING+*(.gnu.linkonce.d.*)}
 137     ${RELOCATING+ . = ALIGN(4);}
 138     ${RELOCATING+ _edata  =  .;}
 139   } ${RELOCATING+ > ram}
 140   .bss ${RELOCATING-0} : {
 141     ${RELOCATING+ . = ALIGN(4);}
 142     ${RELOCATING+ __bss_start = .;}
 143     *(.bss)
 144     ${RELOCATING+*(.bss.*)}
 145     ${RELOCATING+*(.gnu.linkonce.b.*)}
 146     ${RELOCATING+*(COMMON)}
 147     ${RELOCATING+ . = ALIGN(4);}
 148     ${RELOCATING+ __bss_end = .;}
 149     ${RELOCATING+ _sheap = .;}
 150   } ${RELOCATING+ > ram}
 151
 152   saferam ${RELOCATING-0} : {
 153     *(saferam)
 154     ${RELOCATING+ . = ALIGN(4);}
 155     ${RELOCATING+ unitidentry = .;}
 156   } ${RELOCATING+ > saferam}
 157
 158   /* Stabs debugging sections.  */
 159   .stab          0 : { *(.stab) }
 160   .stabstr       0 : { *(.stabstr) }
 161   .stab.excl     0 : { *(.stab.excl) }
 162   .stab.exclstr  0 : { *(.stab.exclstr) }
 163   .stab.index    0 : { *(.stab.index) }
 164   .stab.indexstr 0 : { *(.stab.indexstr) }
 165
 166   .comment       0 : { *(.comment); LINKER_VERSION; }
 167
 168 EOF
 169
 170 source_sh $srcdir/scripttempl/DWARF.sc
 171
 172 cat <<EOF
 173 }
 174 ${RELOCATING+
 175 /* Provide a default address for the simulated file-I/O device.  */
 176 PROVIDE (_sim_fileio_register = 0x2fff0000);
 177
 178 /* Provide a default address for the simulated command line device.  */
 179 PROVIDE (_sim_cmdline_header = 0x2ffe0000);
 180
 181 /* Provide a default address for the simulated 1 MHz clock.  */
 182 PROVIDE (_sim_clock = 0x20002100);}
 183
 184 EOF