ld/scripttempl/elf32cr16.sc

   1 # Linker Script for National Semiconductor's CR16-ELF32.
   2 test -z "$RELOCATING" && exit 0
   3
   4 # The next line should be uncommented if it is desired to link
   5 # without libstart.o and directly enter main.
   6
   7 # ENTRY=_main
   8
   9 test -z "$ENTRY" && ENTRY=_start
  10 cat <<EOF
  11
  12 /* Example Linker Script for linking NS CR16 elf32 files. */
  13
  14 OUTPUT_FORMAT("${OUTPUT_FORMAT}")
  15 OUTPUT_ARCH(${ARCH})
  16 ENTRY(${ENTRY})
  17
  18 /* Define memory regions.  */
  19 MEMORY
  20 {
  21         rom         : ORIGIN = 0x2,         LENGTH = 3M
  22         ram         : ORIGIN = 4M,          LENGTH = 10M
  23 }
  24
  25 /*  Many sections come in three flavours.  There is the 'real' section,
  26     like ".data".  Then there are the per-procedure or per-variable
  27     sections, generated by -ffunction-sections and -fdata-sections in GCC,
  28     and useful for --gc-sections, which for a variable "foo" might be
  29     ".data.foo".  Then there are the linkonce sections, for which the linker
  30     eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
  31     The exact correspondences are:
  32
  33     Section     Linkonce section
  34     .text       .gnu.linkonce.t.foo
  35     .rdata      .gnu.linkonce.r.foo
  36     .data       .gnu.linkonce.d.foo
  37     .bss        .gnu.linkonce.b.foo
  38     .debug_info .gnu.linkonce.wi.foo  */
  39
  40 SECTIONS
  41 {
  42   .init :
  43   {
  44     __INIT_START = .;
  45     KEEP (*(.init))
  46     __INIT_END = .;
  47   } > rom
  48
  49   .fini :
  50   {
  51     __FINI_START = .;
  52     KEEP (*(.fini))
  53     __FINI_END = .;
  54   } > rom
  55
  56   .jcr :
  57   {
  58     KEEP (*(.jcr))
  59   } > rom
  60
  61   .text :
  62   {
  63     __TEXT_START = .;
  64     *(.text) *(.text.*) *(.gnu.linkonce.t.*)
  65     __TEXT_END = .;
  66   } > rom
  67
  68   .rdata :
  69   {
  70     __RDATA_START = .;
  71     *(.rdata_4) *(.rdata_2) *(.rdata_1) *(.rdata.*) *(.gnu.linkonce.r.*) *(.rodata*)
  72     __RDATA_END = .;
  73   } > rom
  74
  75   .ctor ALIGN(4) :
  76   {
  77     __CTOR_START = .;
  78     /* The compiler uses crtbegin.o to find the start
  79        of the constructors, so we make sure it is
  80        first.  Because this is a wildcard, it
  81        doesn't matter if the user does not
  82        actually link against crtbegin.o; the
  83        linker won't look for a file to match a
  84        wildcard.  The wildcard also means that it
  85        doesn't matter which directory crtbegin.o
  86        is in.  */
  87
  88     KEEP (*crtbegin*.o(.ctors))
  89
  90     /* We don't want to include the .ctor section from
  91        the crtend.o file until after the sorted ctors.
  92        The .ctor section from the crtend file contains the
  93        end of ctors marker and it must be last */
  94
  95     KEEP (*(EXCLUDE_FILE (*crtend*.o) .ctors))
  96     KEEP (*(SORT(.ctors.*)))
  97     KEEP (*(.ctors))
  98     __CTOR_END = .;
  99   } > rom
 100
 101   .dtor ALIGN(4) :
 102   {
 103     __DTOR_START = .;
 104     KEEP (*crtbegin*.o(.dtors))
 105     KEEP (*(EXCLUDE_FILE (*crtend*.o) .dtors))
 106     KEEP (*(SORT(.dtors.*)))
 107     KEEP (*(.dtors))
 108     __DTOR_END = .;
 109   } > rom
 110
 111   .data :
 112   {
 113     __DATA_START = .;
 114     *(.data_4) *(.data_2) *(.data_1) *(.data) *(.data.*) *(.gnu.linkonce.d.*)
 115     __DATA_END = .;
 116   } > ram AT > rom
 117
 118   .bss (NOLOAD) :
 119   {
 120     __BSS_START = .;
 121     *(.bss_4) *(.bss_2) *(.bss_1) *(.bss) *(COMMON) *(.bss.*) *(.gnu.linkonce.b.*)
 122     __BSS_END = .;
 123   } > ram
 124
 125 /* You may change the sizes of the following sections to fit the actual
 126    size your program requires.
 127
 128    The heap and stack are aligned to the bus width, as a speed optimization
 129    for accessing data located there.  */
 130
 131   .heap (NOLOAD) :
 132   {
 133     . = ALIGN(4);
 134     __HEAP_START = .;
 135     . += 0x2000; __HEAP_MAX = .;
 136   } > ram
 137
 138   .stack (NOLOAD) :
 139   {
 140     . = ALIGN(4);
 141     . += 0x6000;
 142     __STACK_START = .;
 143   } > ram
 144
 145   .istack (NOLOAD) :
 146   {
 147     . = ALIGN(4);
 148     . += 0x100;
 149     __ISTACK_START = .;
 150   } > ram
 151
 152   .comment        0 : { *(.comment) }
 153
 154   /* DWARF debug sections.
 155      Symbols in the DWARF debugging sections are relative to the beginning
 156      of the section so we begin them at 0.  */
 157
 158   .debug_aranges  0 : { *(.debug_aranges) }
 159   .debug_pubnames 0 : { *(.debug_pubnames) }
 160   .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
 161   .debug_abbrev   0 : { *(.debug_abbrev) }
 162   .debug_line     0 : { *(.debug_line) }
 163   .debug_frame    0 : { *(.debug_frame) }
 164   .debug_str      0 : { *(.debug_str) }
 165   .debug_loc      0 : { *(.debug_loc) }
 166   .debug_macinfo  0 : { *(.debug_macinfo) }
 167 }
 168
 169 __DATA_IMAGE_START = LOADADDR(.data);
 170 EOF