172 lines
4.1 KiB
Python
172 lines
4.1 KiB
Python
# Linker Script for National Semiconductor's CR16-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 "$ENTRY" && ENTRY=_start
|
|
cat <<EOF
|
|
|
|
/* Example Linker Script for linking NS CR16 elf32 files.
|
|
Copyright (C) 2014 Free Software Foundation, Inc.
|
|
|
|
Copying and distribution of this script, with or without modification,
|
|
are permitted in any medium without royalty provided the copyright
|
|
notice and this notice are preserved. */
|
|
|
|
OUTPUT_FORMAT("${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))
|
|
|
|
/* 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) .ctors))
|
|
KEEP (*(SORT(.ctors.*)))
|
|
KEEP (*(.ctors))
|
|
__CTOR_END = .;
|
|
} > rom
|
|
|
|
.dtor ALIGN(4) :
|
|
{
|
|
__DTOR_START = .;
|
|
KEEP (*crtbegin*.o(.dtors))
|
|
KEEP (*(EXCLUDE_FILE (*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
|