pac55xx.ld

OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
/* Internal Memory Map*/
MEMORY
{
	rom0 (rx) : ORIGIN = 0x00000000, LENGTH = 0x00001000
	rom (rx)  : ORIGIN = 0x00001000, LENGTH = 0x0001F000
	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00007F00
	SHARED (rwx) : ORIGIN = 0x20007F00, LENGTH = 0x00000100
}

_eram = 0x20000000 + 0x00008000;
SECTIONS
{
	/* Allocation for bootloader */
 	.bl :
 	{
 		KEEP(*(.bl_section))
 	} > rom0
 
	.text :
	{
		KEEP(*(.isr_vector))
		*(.text*)
		
		KEEP(*(.init))
		KEEP(*(.fini))
		
		/* .ctors */
		*crtbegin.o(.ctors)
		*crtbegin?.o(.ctors)
		*(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
		*(SORT(.ctors.*))
		*(.ctors)
		
		/* .dtors */
		*crtbegin.o(.dtors)
		*crtbegin?.o(.dtors)
		*(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
		*(SORT(.dtors.*))
		*(.dtors)
		
		*(.rodata*)
		
		KEEP(*(.eh_fram e*))
		. = ALIGN(4);			/* Added to ensure _sidata is on a 4 byte boundary */
	} > rom 
	
	.ARM.extab : 
	{
		*(.ARM.extab* .gnu.linkonce.armextab.*)
	} > rom 
	
	__exidx_start = .;
	.ARM.exidx :
	{
		*(.ARM.exidx* .gnu.linkonce.armexidx.*)
	} > rom 
	__exidx_end = .;
	__etext = .;
	
	/* _sidata is used in coide startup code */
	_sidata = __etext;
	
	.data : AT (__etext)
	{
		__data_start__ = .;
		
		/* _sdata is used in coide startup code */
		_sdata = __data_start__;
		
		*(vtable)
		*(.data*)
		
		. = ALIGN(4);
		/* preinit data */
		PROVIDE_HIDDEN (__preinit_array_start = .);
		KEEP(*(.preinit_array))
		PROVIDE_HIDDEN (__preinit_array_end = .);
		
		. = ALIGN(4);
		/* init data */
		PROVIDE_HIDDEN (__init_array_start = .);
		KEEP(*(SORT(.init_array.*)))
		KEEP(*(.init_array))
		PROVIDE_HIDDEN (__init_array_end = .);
		
		. = ALIGN(4);
		/* finit data */
		PROVIDE_HIDDEN (__fini_array_start = .);
		KEEP(*(SORT(.fini_array.*)))
		KEEP(*(.fini_array))
		PROVIDE_HIDDEN (__fini_array_end = .);
		
		KEEP(*(.jcr*))
		. = ALIGN(4);
		/* All data end */
		__data_end__ = .;
		
		/* _edata is used in coide startup code */
		_edata = __data_end__;
	} > ram 

    __ram_start = ORIGIN(ram);	
	__data_size = _edata - _sdata;
	__end_flash = __data_size + __etext; 
	__crc16_checksum = __end_flash;
	
	.bss :
	{
		. = ALIGN(4);
		__bss_start__ = .;
		_sbss = __bss_start__;
		*(.bss*)
		*(COMMON)
		. = ALIGN(4);
		__bss_end__ = .;
		_ebss = __bss_end__;
	} > ram 
		
	.heap (COPY):
	{
		__end__ = .;
		_end = __end__;
		end = __end__;
		*(.heap*)
		__HeapLimit = .;
	} > ram 
	
	/* .stack_dummy section doesn't contains any symbols. It is only
	* used for linker to calculate size of stack sections, and assign
	* values to stack symbols later */
	.co_stack (NOLOAD):
	{
		. = ALIGN(8);
		*(.co_stack .co_stack.*)
	} > ram 
	
	/* Set stack top to end of ram , and stack limit move down by
	* size of stack_dummy section */
	__StackTop = ORIGIN(ram ) + LENGTH(ram );
	__StackLimit = __StackTop - SIZEOF(.co_stack);
	PROVIDE(__stack = __StackTop);

	.shared (NOLOAD):
    {
        /* place all symbols in input sections that start with .shared */
        KEEP(*(*.shared*))
    } > SHARED
	
	/* Check if data + heap + stack exceeds ram  limit */
	ASSERT(__StackLimit >= __HeapLimit, "region ram  overflowed with stack")
}