LinkerScript - stm32_flash.ld
C언어,ARM / 2016. 9. 9. 23:30
/*
*****************************************************************************
**
** File : stm32_flash.ld
**
** Abstract : Linker script for STM32F207 Device with
** 1MByte FLASH, 128KByte SRAM
**
** Set heap size, stack size and stack location according
** to application requirements.
**
** Set memory bank area and size if external memory is used.
**
** Target : STMicroelectronics STM32
**
** Environment : Eclipse with CDT plugin and GCC compiler from CodeSourcery
**
** Author Date Comment
**~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
** T.Kamenicky 24/06/11 Upravil kod stazen z netu
** T.Kamenicky 13/10/11 Predelal na STM32F2
** T.Kamenicky 29/11/11 Pridal podporu externi SRAM
**
*****************************************************************************
*/
/* Entry Point */
/* This define entry point for linker, this address is used for CPU too as absolute first function */
ENTRY(Reset_Handler)
/* Highest address of the user mode stack, _estack is end of stack */
_estack = 0x20020000; /* end of 128K RAM */
/* Generate a link error if heap and stack don't fit into RAM */
/* Heap is zero because we use own malloc implementation. The amount of heap is calculated
* from free space after compilation, see last section for RAM area */
_Min_Heap_Size = 0x0; /* required amount of heap */
/* This stack is used for main function. If FreeRTOS is used this stack is used by OS itself. */
/* The size of stack for tasks is defined in freertos config file and when creating the task. */
_Min_Stack_Size = 0x600; /* required amount of stack */
/* Specify the memory areas */
MEMORY
{
FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 1022K /* This is main program area */
FACTORY_VAR(rx) : ORIGIN = 0x080FF800, LENGTH = 2K /* This area is used for factory values, such as MAC address, ID...etc */
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 128K /* This is RAM area */
FSMC_SRAM (rx) : ORIGIN = 0x64000000, LENGTH = 2048K /* This is useful for external memory, like thru FSMC peripheral */
}
/* Library configurations */
GROUP(libgcc.a libc.a libm.a libnosys.a)
/* Linker script to place sections and symbol values. Should be used together
* with other linker script that defines memory regions FLASH and RAM.
* It references following symbols, which must be defined in code:
* Reset_Handler : Entry of reset handler
*
* It defines following symbols, which code can use without definition:
* __exidx_start
* __exidx_end
* __etext
* __data_start__
* __preinit_array_start
* __preinit_array_end
* __init_array_start
* __init_array_end
* __fini_array_start
* __fini_array_end
* __data_end__
* __bss_start__
* __bss_end__
* __end__
* end
* __HeapLimit
* __StackLimit
* __StackTop
* __stack
*/
ENTRY(Reset_Handler)
SECTIONS
{
/* The startup code goes first into FLASH */
.isr_vector :
{
. = ALIGN(4);
KEEP(*(.isr_vector)) /* Startup code */
. = ALIGN(4);
} >FLASH
/* The program code and other data goes into FLASH */
.text :
{
. = ALIGN(4);
*(.text) /* .text sections (code) */
*(.text*) /* .text* sections (code) */
*(.rodata) /* .rodata sections (constants, strings, etc.) */
*(.rodata*) /* .rodata* sections (constants, strings, etc.) */
*(.glue_7) /* glue arm to thumb code */
*(.glue_7t) /* glue thumb to arm code */
KEEP (*(.init))
KEEP (*(.fini))
. = ALIGN(4);
_etext = .; /* define a global symbols at end of code */
} >FLASH
/* .ARM.extab names a section that contains exception unwinding information. See EHABI for details. */
/* .ARM.exidx names a section that contains index entries for section unwinding. See EHABI for details. */
.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
.ARM : {
__exidx_start = .;
*(.ARM.exidx*)
__exidx_end = .;
} >FLASH
/* Is used for compiler information, which is located only in elf file */
.ARM.attributes 0 : { *(.ARM.attributes) }
/* Those sections is used for initializing dynamic objects used in C++ */
.preinit_array :
{
PROVIDE_HIDDEN (__preinit_array_start = .);
KEEP (*(.preinit_array*))
PROVIDE_HIDDEN (__preinit_array_end = .);
} >FLASH
.init_array :
{
PROVIDE_HIDDEN (__init_array_start = .);
KEEP (*(SORT(.init_array.*)))
KEEP (*(.init_array*))
PROVIDE_HIDDEN (__init_array_end = .);
} >FLASH
.fini_array :
{
PROVIDE_HIDDEN (__fini_array_start = .);
KEEP (*(.fini_array*))
KEEP (*(SORT(.fini_array.*)))
PROVIDE_HIDDEN (__fini_array_end = .);
} >FLASH
/* used by the startup as memory location to initialize data */
/* from this point the content of flash is copied to ram */
_sidata = .;
/* Initialized data sections goes into RAM, load LMA copy after code */
.data : AT ( _sidata )
{
. = ALIGN(4);
_sdata = .; /* create a global symbol at data start */
*(.data) /* .data sections */
*(.data*) /* .data* sections */
. = ALIGN(4);
_edata = .; /* define a global symbol at data end */
} >RAM
_SRAM_data = _sidata + _edata - _sdata;
/* Second part of inicialized section goes into SRAM conected thru FSMC */
/* FSMC_SRAM section, code must be located here explicitly */
/* unsigned long int __attribute__ ((section (".sram_data"))) my_initialized_number = 0xAABBCCDD; */
.fsmc_sram_data : AT ( _SRAM_data )
{
. = ALIGN(4);
_iSRAM_data = .;
*(.sram_data)
*(.sram_data*)
. = ALIGN(4);
_iSRAM_data_end = .;
} >FSMC_SRAM
.fsmc_sram_bss : AT ( _iSRAM_data_end )
{
_iSRAM_null_data = .;
*(.sram_bss)
*(.sram_bss*)
. = ALIGN(4);
_iSRAM_null_data_end = .;
} >FSMC_SRAM
.fsmc_sram_perma : AT ( _iSRAM_null_data_end )
{
_iSRAM_perma_data = .;
*(.sram_perma)
*(.sram_perma*)
. = ALIGN(4);
_iSRAM_perma_data_end = .;
} >FSMC_SRAM
/* Uninitialized data section */
. = ALIGN(4);
.bss : AT ( _edata )
{
/* This is used by the startup in order to initialize the .bss secion */
_sbss = .; /* define a global symbol at bss start */
__bss_start__ = _sbss;
*(.bss)
*(.bss*)
*(COMMON)
. = ALIGN(4);
_ebss = .; /* define a global symbol at bss end */
__bss_end__ = _ebss;
} >RAM
/* Those numbers are used for SRAM init */
PROVIDE ( _linker_sram_start = _iSRAM_data );
PROVIDE ( _linker_sram_data_end = _iSRAM_data_end );
PROVIDE ( _linker_sram_end = _iSRAM_null_data_end );
PROVIDE ( _linker_sram_inits = _SRAM_data );
/* Those numbers are used for malloc and sbrk functions */
PROVIDE ( _linker_memory_start = _sdata );
PROVIDE ( _linker_heap_start = _ebss );
PROVIDE ( _linker_heap_end = (_estack - _Min_Stack_Size) );
PROVIDE ( _linker_memory_end = _estack );
PROVIDE ( _end = _ebss );
/* User_heap_stack section, used to check that there is enough RAM left */
._user_heap_stack : AT ( _linker_heap_end )
{
. = ALIGN(4);
. = . + _Min_Heap_Size;
. = . + _Min_Stack_Size;
. = ALIGN(4);
} >RAM
/* FLASH memory area for factory default values */
/* Example of usage: extern int foo(void) __attribute__ ((section (".fvtext"))); */
/* unsigned long int my_factory_number_changed_in_production = 0xAABBCCDD __attribute__ ((section (".fvrodata"))); */
.factory_values :
{
. = ALIGN(4);
*(.fvtext) /* .fvtext sections (code) */
*(.fvtext*) /* .fvtext* sections (code) */
*(.fvrodata) /* read-only data (constants) */
*(.fvrodata*)
. = ALIGN(4);
} >FACTORY_VAR
/* Remove information from the standard libraries */
/DISCARD/ :
{
libc.a ( * )
libm.a ( * )
libgcc.a ( * )
}
}
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