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Diffstat (limited to 'ld/scripttempl/elf32crx.sc')
-rw-r--r-- | ld/scripttempl/elf32crx.sc | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/ld/scripttempl/elf32crx.sc b/ld/scripttempl/elf32crx.sc new file mode 100644 index 0000000..93facc2 --- /dev/null +++ b/ld/scripttempl/elf32crx.sc @@ -0,0 +1,176 @@ +# Linker Script for National Semiconductor's CRX-ELF32. +# +# Copyright (C) 2014 Free Software Foundation, Inc. +# +# Copying and distribution of this file, with or without modification, +# are permitted in any medium without royalty provided the copyright +# notice and this notice are preserved. + +# The next line should be uncommented if it is desired to link +# without libstart.o and directly enter main. + +# ENTRY=_main + +test -z "$ENTRY" && ENTRY=_start +cat <<EOF + +/* Example Linker Script for linking NS CRX elf32 files. + + Copyright (C) 2014 Free Software Foundation, Inc. + + Copying and distribution of this script, with or without modification, + are permitted in any medium without royalty provided the copyright + notice and this notice are preserved. */ + + +OUTPUT_FORMAT("${OUTPUT_FORMAT}") +OUTPUT_ARCH(${ARCH}) +${RELOCATING+ENTRY(${ENTRY})} + +/* Define memory regions. */ +MEMORY +{ + rom : ORIGIN = 0x2, LENGTH = 3M + ram : ORIGIN = 4M, LENGTH = 10M +} + +/* Many sections come in three flavours. There is the 'real' section, + like ".data". Then there are the per-procedure or per-variable + sections, generated by -ffunction-sections and -fdata-sections in GCC, + and useful for --gc-sections, which for a variable "foo" might be + ".data.foo". Then there are the linkonce sections, for which the linker + eliminates duplicates, which are named like ".gnu.linkonce.d.foo". + The exact correspondences are: + + Section Linkonce section + .text .gnu.linkonce.t.foo + .rdata .gnu.linkonce.r.foo + .data .gnu.linkonce.d.foo + .bss .gnu.linkonce.b.foo + .debug_info .gnu.linkonce.wi.foo */ + +SECTIONS +{ + .init : + { + __INIT_START = .; + KEEP (*(.init)) + __INIT_END = .; + } > rom + + .fini : + { + __FINI_START = .; + KEEP (*(.fini)) + __FINI_END = .; + } > rom + + .jcr : + { + KEEP (*(.jcr)) + } > rom + + .text : + { + __TEXT_START = .; + *(.text) *(.text.*) *(.gnu.linkonce.t.*) + __TEXT_END = .; + } > rom + + .rdata : + { + __RDATA_START = .; + *(.rdata_4) *(.rdata_2) *(.rdata_1) *(.rdata.*) *(.gnu.linkonce.r.*) *(.rodata.*) + __RDATA_END = .; + } > rom + + .ctor ALIGN(4) : + { + __CTOR_START = .; + /* The compiler uses crtbegin.o to find the start + of the constructors, so we make sure it is + first. Because this is a wildcard, it + doesn't matter if the user does not + actually link against crtbegin.o; the + linker won't look for a file to match a + wildcard. The wildcard also means that it + doesn't matter which directory crtbegin.o + is in. */ + + KEEP (*crtbegin.o(.ctors)) + KEEP (*crtbegin?.o(.ctors)) + + /* We don't want to include the .ctor section from + the crtend.o file until after the sorted ctors. + The .ctor section from the crtend file contains the + end of ctors marker and it must be last */ + + KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .ctors)) + KEEP (*(SORT(.ctors.*))) + KEEP (*(.ctors)) + __CTOR_END = .; + } > rom + + .dtor ALIGN(4) : + { + __DTOR_START = .; + KEEP (*crtbegin.o(.dtors)) + KEEP (*crtbegin?.o(.dtors)) + KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .dtors)) + KEEP (*(SORT(.dtors.*))) + KEEP (*(.dtors)) + __DTOR_END = .; + } > rom + + .data : + { + __DATA_START = .; + *(.data_4) *(.data_2) *(.data_1) *(.data) *(.data.*) *(.gnu.linkonce.d.*) + __DATA_END = .; + } > ram AT > rom + + .bss (NOLOAD) : + { + __BSS_START = .; + *(.bss_4) *(.bss_2) *(.bss_1) *(.bss) *(COMMON) *(.bss.*) *(.gnu.linkonce.b.*) + __BSS_END = .; + } > ram + +/* You may change the sizes of the following sections to fit the actual + size your program requires. + + The heap and stack are aligned to the bus width, as a speed optimization + for accessing data located there. */ + + .heap (NOLOAD) : + { + . = ALIGN(4); + __HEAP_START = .; + . += 0x2000; __HEAP_MAX = .; + } > ram + + .stack (NOLOAD) : + { + . = ALIGN(4); + . += 0x6000; + __STACK_START = .; + } > ram + + .istack (NOLOAD) : + { + . = ALIGN(4); + . += 0x100; + __ISTACK_START = .; + } > ram + + .comment 0 : { *(.comment) } + +EOF + +. $srcdir/scripttempl/DWARF.sc + +cat <<EOF +} + +__DATA_IMAGE_START = LOADADDR(.data); +EOF |