Add (linker) support for CR16C processor

ld/scripttempl/elf32cr16c.sc

@@ -0,0 +1,52 @@
+# Linker Script for National Semiconductor's CR16C-ELF32.
+
+test -z "$ENTRY" && ENTRY=_start
+cat <<EOF
+
+/* Example Linker Script for linking NS CR16C or CR16CPlus
+   elf32 files, which were compiled with either the near data
+   model or the default data model.  */
+
+/* Force the entry point to be entered in the output file as
+   an undefined symbol. This is needed in case the entry point
+   (which is not called explicitly) is in an archive (which is
+   the usual case).  */
+
+EXTERN(${ENTRY})
+
+ENTRY(${ENTRY})
+
+MEMORY
+{
+  near_rom  : ORIGIN = 0x4,     LENGTH = 512K - 4
+  near_ram  : ORIGIN = 512K,    LENGTH = 512K - 64K
+  rom  	    : ORIGIN = 1M,      LENGTH = 3M
+  ram 	    : ORIGIN = 4M,      LENGTH = 10M
+}
+
+SECTIONS
+{
+/* The heap is located in near memory, to suit both the near and
+   default data models.  The heap and stack are aligned to the bus
+   width, as a speed optimization for accessing  data located
+   there. The alignment to 4 bytes is compatible for both the CR16C
+   bus width (2 bytes) and CR16CPlus bus width (4 bytes).  */
+
+  .text          : { __TEXT_START = .;   *(.text)                                        __TEXT_END = .; } > rom	
+  .rdata         : { __RDATA_START = .;  *(.rdata_4) *(.rdata_2) *(.rdata_1)             __RDATA_END = .; } > near_rom
+  .ctor ALIGN(4) : { __CTOR_LIST = .;    *(.ctors)                                       __CTOR_END = .; } > near_rom
+  .dtor ALIGN(4) : { __DTOR_LIST = .;    *(.dtors)                                       __DTOR_END = .; } > near_rom
+  .data          : { __DATA_START = .;   *(.data_4) *(.data_2) *(.data_1) *(.data)       __DATA_END = .; } > ram AT > rom
+  .bss (NOLOAD)  : { __BSS_START = .;    *(.bss_4) *(.bss_2) *(.bss_1) *(.bss) *(COMMON) __BSS_END = .; } > ram
+  .nrdata        : { __NRDATA_START = .; *(.nrdat_4) *(.nrdat_2) *(.nrdat_1)             __NRDATA_END =  .; } > near_rom
+  .ndata         : { __NDATA_START = .;  *(.ndata_4) *(.ndata_2) *(.ndata_1)             __NDATA_END = .; } > near_ram AT > rom
+  .nbss (NOLOAD) : { __NBSS_START = .;   *(.nbss_4) *(.nbss_2) *(.nbss_1) *(.ncommon)    __NBSS_END = .; } > near_ram
+  .heap          : { . = ALIGN(4); __HEAP_START = .; . += 0x2000;                        __HEAP_MAX = .; } > near_ram
+  .stack         : { . = ALIGN(4); . += 0x6000; __STACK_START = .; } > ram
+  .istack        : { . = ALIGN(2); . += 0x100; __ISTACK_START = .; } > ram
+}
+
+__DATA_IMAGE_START = LOADADDR(.data);
+__NDATA_IMAGE_START = LOADADDR(.ndata);
+
+EOF