187 lines
4.5 KiB
Text
187 lines
4.5 KiB
Text
/* Entry Point of program, interrupt vector table in this case.*/
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/* IVT: data structure that associates list of interrupt handlers with
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* a list of interrupt requests in a table of interrupt vectors.
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*/
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ENTRY( InterruptVector )
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/*
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* Memory Layout:
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* Flash(read execute):
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* Ram(read write execute)
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*/
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 16K
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RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 2K
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}
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SECTIONS
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{
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/*
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* Initialization section:
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* handles startup initialization routines stored in flash.
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*/
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.init :
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{
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_sinit = .;
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. = ALIGN(4);
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KEEP(*(SORT_NONE(.init)))
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. = ALIGN(4);
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_einit = .;
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} >FLASH AT>FLASH
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/*
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* Text Section:
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* Contains executable code and read-only data(rodata)
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* Stored in flash.
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*/
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.text :
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{
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. = ALIGN(4);
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*(.text)
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*(.text.*)
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*(.rodata)
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*(.rodata*)
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*(.gnu.linkonce.t.*)
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/* Include additional object files. */
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/* *(EXTERN(*)) /* Link against external symbols */
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. = ALIGN(4);
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} >FLASH AT>FLASH
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/*
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* Finalization Section:
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* Contains finalization routines, executed before exiting the program.
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*/
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.fini :
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{
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KEEP(*(SORT_NONE(.fini)))
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. = ALIGN(4);
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} >FLASH AT>FLASH
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/*PROVODE: defines a symbol only if it is not already defined elsewhere.*/
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PROVIDE( _etext = . );
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PROVIDE( _eitcm = . );
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/*
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* The preinit_array and init_array handle static/global constructors and
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* initalizers.
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*/
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.preinit_array :
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{
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PROVIDE_HIDDEN (__preinit_array_start = .);
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KEEP (*(.preinit_array))
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PROVIDE_HIDDEN (__preinit_array_end = .);
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} >FLASH AT>FLASH
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.init_array :
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{
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PROVIDE_HIDDEN (__init_array_start = .);
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KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
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KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
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PROVIDE_HIDDEN (__init_array_end = .);
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} >FLASH AT>FLASH
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.fini_array :
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{
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PROVIDE_HIDDEN (__fini_array_start = .);
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KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
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KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
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PROVIDE_HIDDEN (__fini_array_end = .);
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} >FLASH AT>FLASH
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/* Constructors Section: needed for C++ */
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.ctors :
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{
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KEEP (*crtbegin.o(.ctors))
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KEEP (*crtbegin?.o(.ctors))
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KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
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KEEP (*(SORT(.ctors.*)))
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KEEP (*(.ctors))
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} >FLASH AT>FLASH
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/* Destructors Section: needed for C++ */
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.dtors :
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{
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KEEP (*crtbegin.o(.dtors))
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KEEP (*crtbegin?.o(.dtors))
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KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
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KEEP (*(SORT(.dtors.*)))
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KEEP (*(.dtors))
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} >FLASH AT>FLASH
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/* Likely for data alignment.*/
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.dalign :
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{
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. = ALIGN(4);
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PROVIDE(_data_vma = .);
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} >RAM AT>FLASH
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/* Likely for dynamic loader alignment.*/
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.dlalign :
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{
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. = ALIGN(4);
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PROVIDE(_data_lma = .);
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} >FLASH AT>FLASH
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/*
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* Data section: Initialized Variables
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* contains initialized variables copied from flash to ram at startup.
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* `_sdata` and `_edata` mark the start and end of the `.data` section.
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*/
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.data :
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{
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. = ALIGN(4);
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__global_pointer$ = . + 0x3fc;
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*(.gnu.linkonce.r.*)
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*(.data .data.*)
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*(.gnu.linkonce.d.*)
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. = ALIGN(8);
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*(.sdata .sdata.*)
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*(.sdata2*)
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*(.gnu.linkonce.s.*)
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. = ALIGN(8);
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*(.srodata.cst16)
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*(.srodata.cst8)
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*(.srodata.cst4)
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*(.srodata.cst2)
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*(.srodata .srodata.*)
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/* Trying to include datasections for external object files.*/
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/*
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* *(.data)
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* *(.data.*)
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*/
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. = ALIGN(4);
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PROVIDE( _edata = .);
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} >RAM AT>FLASH
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/* BSS Section: Contains uninitialized variables.
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* Holds uninited global/static vars. The runtime must zero out this
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* section before main function.
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*/
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.bss :
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{
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. = ALIGN(4);
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PROVIDE( _sbss = .);
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*(.sbss*)
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*(.gnu.linkonce.sb.*)
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*(.bss*)
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*(.gnu.linkonce.b.*)
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*(COMMON*)
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. = ALIGN(4);
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PROVIDE( _ebss = .);
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} >RAM AT>FLASH
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PROVIDE( _end = _ebss);
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PROVIDE( end = . );
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PROVIDE( _eusrstack = ORIGIN(RAM) + LENGTH(RAM));
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/DISCARD/ : {
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*(.note .note.*)
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*(.eh_frame .eh_frame.*)
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*(.comment .comment.*)
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*(.ARM.extab* .gnu.linkonce.armextab.*)
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*(.ARM.exidx*)
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}
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}
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