# Linker Script for National Semiconductor's CRX-ELF32.
+#
+# Copyright (C) 2014-2018 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.
+
+# Using an empty script for ld -r is better than mashing together
+# sections. This hack likely leaves ld -Ur broken.
+test -n "${RELOCATING}" || exit 0
# The next line should be uncommented if it is desired to link
# without libstart.o and directly enter main.
test -z "$ENTRY" && ENTRY=_start
cat <<EOF
-/* Example Linker Script for linking NS CRX elf32 files. */
+/* Example Linker Script for linking NS CRX elf32 files.
+
+ Copyright (C) 2014-2018 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. */
-/* The next line forces the entry point (${ENTRY} in this script)
- to be entered in the output file as an undefined symbol.
- It is needed in case the entry point is not called explicitly
- (which is the usual case) AND is in an archive. */
OUTPUT_FORMAT("${OUTPUT_FORMAT}")
OUTPUT_ARCH(${ARCH})
-EXTERN(${ENTRY})
-ENTRY(${ENTRY})
+${RELOCATING+ENTRY(${ENTRY})}
/* Define memory regions. */
MEMORY
{
- rom : ORIGIN = 0x2, LENGTH = 3M
- ram : ORIGIN = 4M, LENGTH = 10M
+ 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
{
- .text : { __TEXT_START = .; *(.text) *(.text.*) *(.gnu.linkonce.t.*) __TEXT_END = .; } > rom
-
- .rdata : { __RDATA_START = .; *(.rdata_4) *(.rdata_2) *(.rdata_1) *(.rdata.*) *(.gnu.linkonce.r.*) __RDATA_END = .; } > rom
-
- .ctor ALIGN(4) : { __CTOR_LIST = .; *(.ctors) __CTOR_END = .; } > rom
-
- .dtor ALIGN(4) : { __DTOR_LIST = .; *(.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
+ .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 : { . = ALIGN(4); __HEAP_START = .; . += 0x2000; __HEAP_MAX = .; } > ram
- .stack : { . = ALIGN(4); . += 0x6000; __STACK_START = .; } > ram
- .istack : { . = ALIGN(4); . += 0x100; __ISTACK_START = .; } > ram
+ .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);
projects / binutils-gdb.git / blobdiff