388 lines
10 KiB
Plaintext
388 lines
10 KiB
Plaintext
/*
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* Default linker script for Cortex-M
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*
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* To make use of the multi-region initialisations, define
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* OS_INCLUDE_STARTUP_INIT_MULTIPLE_RAM_SECTIONS for the _startup.c file.
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*/
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/*
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* The '__stack' definition is required by crt0, do not remove it.
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*/
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__stack = ORIGIN(RAM) + LENGTH(RAM);
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_estack = __stack; /* STM specific definition */
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/*
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* Default stack sizes.
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* These are used by the startup in order to allocate stacks
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* for the different modes.
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*/
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__Main_Stack_Size = 1024 ;
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PROVIDE ( _Main_Stack_Size = __Main_Stack_Size ) ;
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__Main_Stack_Limit = __stack - __Main_Stack_Size ;
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/* "PROVIDE" allows to easily override these values from an
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* object file or the command line. */
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PROVIDE ( _Main_Stack_Limit = __Main_Stack_Limit ) ;
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/*
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* There will be a link error if there is not this amount of
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* RAM free at the end.
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*/
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_Minimum_Stack_Size = 256 ;
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/*
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* Default heap definitions.
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* The heap start immediately after the last statically allocated
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* .sbss/.noinit section, and extends up to the main stack limit.
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*/
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PROVIDE ( _Heap_Begin = _end_noinit ) ;
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PROVIDE ( _Heap_Limit = __stack - __Main_Stack_Size ) ;
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/*
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* The entry point is informative, for debuggers and simulators,
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* since the Cortex-M vector points to it anyway.
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*/
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ENTRY(_start)
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/* Sections Definitions */
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SECTIONS
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{
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/*
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* For Cortex-M devices, the beginning of the startup code is stored in
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* the .isr_vector section, which goes to FLASH.
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*/
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.isr_vector : ALIGN(4)
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{
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FILL(0xFF)
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__vectors_start = ABSOLUTE(.) ;
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__vectors_start__ = ABSOLUTE(.) ; /* STM specific definition */
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KEEP(*(.isr_vector)) /* Interrupt vectors */
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KEEP(*(.cfmconfig)) /* Freescale configuration words */
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/*
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* This section is here for convenience, to store the
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* startup code at the beginning of the flash area, hoping that
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* this will increase the readability of the listing.
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*/
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*(.after_vectors .after_vectors.*) /* Startup code and ISR */
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} >FLASH
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.inits : ALIGN(4)
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{
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/*
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* Memory regions initialisation arrays.
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*
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* Thee are two kinds of arrays for each RAM region, one for
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* data and one for bss. Each is iterrated at startup and the
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* region initialisation is performed.
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*
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* The data array includes:
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* - from (LOADADDR())
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* - region_begin (ADDR())
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* - region_end (ADDR()+SIZEOF())
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*
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* The bss array includes:
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* - region_begin (ADDR())
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* - region_end (ADDR()+SIZEOF())
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*
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* WARNING: It is mandatory that the regions are word aligned,
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* since the initialisation code works only on words.
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*/
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__data_regions_array_start = .;
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LONG(LOADADDR(.data));
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LONG(ADDR(.data));
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LONG(ADDR(.data)+SIZEOF(.data));
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__data_regions_array_end = .;
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__bss_regions_array_start = .;
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LONG(ADDR(.bss));
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LONG(ADDR(.bss)+SIZEOF(.bss));
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__bss_regions_array_end = .;
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/* End of memory regions initialisation arrays. */
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/*
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* These are the old initialisation sections, intended to contain
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* naked code, with the prologue/epilogue added by crti.o/crtn.o
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* when linking with startup files. The standalone startup code
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* currently does not run these, better use the init arrays below.
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*/
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KEEP(*(.init))
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KEEP(*(.fini))
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/* section information for finsh shell */
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. = ALIGN(4);
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__fsymtab_start = .;
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KEEP(*(FSymTab))
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__fsymtab_end = .;
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. = ALIGN(4);
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__vsymtab_start = .;
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KEEP(*(VSymTab))
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__vsymtab_end = .;
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. = ALIGN(4);
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/* section information for initial. */
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. = ALIGN(4);
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__rt_init_start = .;
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KEEP(*(SORT(.rti_fn*)))
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__rt_init_end = .;
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. = ALIGN(4);
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/*
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* The preinit code, i.e. an array of pointers to initialisation
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* functions to be performed before constructors.
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*/
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PROVIDE_HIDDEN (__preinit_array_start = .);
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/*
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* Used to run the SystemInit() before anything else.
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*/
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KEEP(*(.preinit_array_sysinit .preinit_array_sysinit.*))
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/*
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* Used for other platform inits.
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*/
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KEEP(*(.preinit_array_platform .preinit_array_platform.*))
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/*
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* The application inits. If you need to enforce some order in
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* execution, create new sections, as before.
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*/
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KEEP(*(.preinit_array .preinit_array.*))
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PROVIDE_HIDDEN (__preinit_array_end = .);
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. = ALIGN(4);
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/*
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* The init code, i.e. an array of pointers to static constructors.
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*/
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PROVIDE_HIDDEN (__init_array_start = .);
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KEEP(*(SORT(.init_array.*)))
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KEEP(*(.init_array))
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PROVIDE_HIDDEN (__init_array_end = .);
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. = ALIGN(4);
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/*
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* The fini code, i.e. an array of pointers to static destructors.
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*/
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PROVIDE_HIDDEN (__fini_array_start = .);
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KEEP(*(SORT(.fini_array.*)))
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KEEP(*(.fini_array))
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PROVIDE_HIDDEN (__fini_array_end = .);
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} >FLASH
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/*
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* For some STRx devices, the beginning of the startup code
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* is stored in the .flashtext section, which goes to FLASH.
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*/
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.flashtext : ALIGN(4)
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{
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*(.flashtext .flashtext.*) /* Startup code */
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} >FLASH
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/*
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* The program code is stored in the .text section,
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* which goes to FLASH.
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*/
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.text : ALIGN(4)
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{
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*(.text .text.*) /* all remaining code */
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/* read-only data (constants) */
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*(.rodata .rodata.* .constdata .constdata.*)
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*(vtable) /* C++ virtual tables */
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KEEP(*(.eh_frame*))
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/*
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* Stub sections generated by the linker, to glue together
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* ARM and Thumb code. .glue_7 is used for ARM code calling
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* Thumb code, and .glue_7t is used for Thumb code calling
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* ARM code. Apparently always generated by the linker, for some
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* architectures, so better leave them here.
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*/
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*(.glue_7)
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*(.glue_7t)
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KEEP (*(.init))
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KEEP (*(.fini))
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} >FLASH
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/* ARM magic sections */
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.ARM.extab : ALIGN(4)
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{
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*(.ARM.extab* .gnu.linkonce.armextab.*)
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} > FLASH
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. = ALIGN(4);
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__exidx_start = .;
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.ARM.exidx : ALIGN(4)
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{
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*(.ARM.exidx* .gnu.linkonce.armexidx.*)
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} > FLASH
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__exidx_end = .;
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. = ALIGN(4);
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_etext = .;
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__etext = .;
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/* MEMORY_ARRAY */
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/*
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.ROarraySection :
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{
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*(.ROarraySection .ROarraySection.*)
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} >MEMORY_ARRAY
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*/
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/*
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* This address is used by the startup code to
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* initialise the .data section.
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*/
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_sidata = LOADADDR(.data);
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/*
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* The initialised data section.
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*
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* The program executes knowing that the data is in the RAM
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* but the loader puts the initial values in the FLASH (inidata).
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* It is one task of the startup to copy the initial values from
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* FLASH to RAM.
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*/
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.data : ALIGN(4)
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{
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FILL(0xFF)
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/* This is used by the startup code to initialise the .data section */
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_sdata = . ; /* STM specific definition */
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__data_start__ = . ;
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*(.data_begin .data_begin.*)
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*(.data .data.*)
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*(.data_end .data_end.*)
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. = ALIGN(4);
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/* This is used by the startup code to initialise the .data section */
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_edata = . ; /* STM specific definition */
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__data_end__ = . ;
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} >RAM AT>FLASH
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/*
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* The uninitialised data sections. NOLOAD is used to avoid
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* the "section `.bss' type changed to PROGBITS" warning
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*/
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/* The primary uninitialised data section. */
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.bss (NOLOAD) : ALIGN(4)
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{
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__bss_start__ = .; /* standard newlib definition */
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_sbss = .; /* STM specific definition */
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*(.bss_begin .bss_begin.*)
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*(.bss .bss.*)
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*(COMMON)
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*(.bss_end .bss_end.*)
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. = ALIGN(4);
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__bss_end__ = .; /* standard newlib definition */
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_ebss = . ; /* STM specific definition */
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} >RAM
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.noinit (NOLOAD) : ALIGN(4)
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{
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_noinit = .;
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*(.noinit .noinit.*)
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. = ALIGN(4) ;
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_end_noinit = .;
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} > RAM
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/* Mandatory to be word aligned, _sbrk assumes this */
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PROVIDE ( end = _end_noinit ); /* was _ebss */
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PROVIDE ( _end = _end_noinit );
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PROVIDE ( __end = _end_noinit );
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PROVIDE ( __end__ = _end_noinit );
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/*
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* Used for validation only, do not allocate anything here!
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*
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* This is just to check that there is enough RAM left for the Main
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* stack. It should generate an error if it's full.
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*/
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._check_stack : ALIGN(4)
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{
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. = . + _Minimum_Stack_Size ;
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} >RAM
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/* After that there are only debugging sections. */
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/* This can remove the debugging information from the standard libraries */
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/*
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DISCARD :
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{
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libc.a ( * )
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libm.a ( * )
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libgcc.a ( * )
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}
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*/
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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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/*
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* DWARF debug sections.
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* Symbols in the DWARF debugging sections are relative to the beginning
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* of the section so we begin them at 0.
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*/
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/* DWARF 1 */
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.debug 0 : { *(.debug) }
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.line 0 : { *(.line) }
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/* GNU DWARF 1 extensions */
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.debug_srcinfo 0 : { *(.debug_srcinfo) }
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.debug_sfnames 0 : { *(.debug_sfnames) }
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/* DWARF 1.1 and DWARF 2 */
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.debug_aranges 0 : { *(.debug_aranges) }
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.debug_pubnames 0 : { *(.debug_pubnames) }
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/* DWARF 2 */
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.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
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.debug_abbrev 0 : { *(.debug_abbrev) }
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.debug_line 0 : { *(.debug_line) }
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.debug_frame 0 : { *(.debug_frame) }
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.debug_str 0 : { *(.debug_str) }
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.debug_loc 0 : { *(.debug_loc) }
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.debug_macinfo 0 : { *(.debug_macinfo) }
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/* SGI/MIPS DWARF 2 extensions */
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.debug_weaknames 0 : { *(.debug_weaknames) }
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.debug_funcnames 0 : { *(.debug_funcnames) }
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.debug_typenames 0 : { *(.debug_typenames) }
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.debug_varnames 0 : { *(.debug_varnames) }
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}
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