Tooltron

/**

 * Where we store the jump to user code. The jump address is in words

 * due to how the rjmp instruction works. It is 1 word below the bootloader

 */

/**

 * We declare main as naked so that there is no overhead for entering

 * and returning from this function since we don't really care about

 * what happens to it after we leave it

 */

/** 

 * Restore the reset vector to point to the end of ctors. This

 * is because we are stripping out the interrupt vector table

 * from the bootloader as we don't use it.

 */

void ResetVector (void) __attribute__((naked))

                        __attribute__((section(".reset")));

void ResetVector(void) {

    asm("rjmp __ctors_end");

}

LDFLAGS = -Wl,--script=linker_script.x,-Map=$(TARGET).map,--cref,--section-start=.text=$(BOOTSTART),--section-start=.jumps=$(JUMPSTART),--undefined=_jumptable,--gc-sections

/* Default linker script, for normal executables */

OUTPUT_FORMAT("elf32-avr","elf32-avr","elf32-avr")

OUTPUT_ARCH(avr:2)

MEMORY

{

  text      (rx)   : ORIGIN = 0, LENGTH = 8K

  data      (rw!x) : ORIGIN = 0x800060, LENGTH = 0xffa0

  eeprom    (rw!x) : ORIGIN = 0x810000, LENGTH = 64K

  fuse      (rw!x) : ORIGIN = 0x820000, LENGTH = 1K

  lock      (rw!x) : ORIGIN = 0x830000, LENGTH = 1K

  signature (rw!x) : ORIGIN = 0x840000, LENGTH = 1K

}

SECTIONS

{

  /* Read-only sections, merged into text segment: */

  .hash          : { *(.hash)		}

  .dynsym        : { *(.dynsym)		}

  .dynstr        : { *(.dynstr)		}

  .gnu.version   : { *(.gnu.version)	}

  .gnu.version_d   : { *(.gnu.version_d)	}

  .gnu.version_r   : { *(.gnu.version_r)	}

  .rel.init      : { *(.rel.init)		}

  .rela.init     : { *(.rela.init)	}

  .rel.text      :

    {

      *(.rel.text)

      *(.rel.text.*)

      *(.rel.gnu.linkonce.t*)

    }

  .rela.text     :

    {

      *(.rela.text)

      *(.rela.text.*)

      *(.rela.gnu.linkonce.t*)

    }

  .rel.fini      : { *(.rel.fini)		}

  .rela.fini     : { *(.rela.fini)	}

  .rel.rodata    :

    {

      *(.rel.rodata)

      *(.rel.rodata.*)

      *(.rel.gnu.linkonce.r*)

    }

  .rela.rodata   :

    {

      *(.rela.rodata)

      *(.rela.rodata.*)

      *(.rela.gnu.linkonce.r*)

    }

  .rel.data      :

    {

      *(.rel.data)

      *(.rel.data.*)

      *(.rel.gnu.linkonce.d*)

    }

  .rela.data     :

    {

      *(.rela.data)

      *(.rela.data.*)

      *(.rela.gnu.linkonce.d*)

    }

  .rel.ctors     : { *(.rel.ctors)	}

  .rela.ctors    : { *(.rela.ctors)	}

  .rel.dtors     : { *(.rel.dtors)	}

  .rela.dtors    : { *(.rela.dtors)	}

  .rel.got       : { *(.rel.got)		}

  .rela.got      : { *(.rela.got)		}

  .rel.bss       : { *(.rel.bss)		}

  .rela.bss      : { *(.rela.bss)		}

  .rel.plt       : { *(.rel.plt)		}

  .rela.plt      : { *(.rela.plt)		}

  /* Internal text space or external memory.  */

  .text :

  {

    bootloader.o(.reset)

    KEEP(*(.reset))

    *(.vectors)

    /*KEEP(*(.vectors))*/

    /* For data that needs to reside in the lower 64k of progmem.  */

    *(.progmem.gcc*)

    *(.progmem*)

    . = ALIGN(2);

     __trampolines_start = . ;

    /* The jump trampolines for the 16-bit limited relocs will reside here.  */

    *(.trampolines)

    *(.trampolines*)

     __trampolines_end = . ;

    /* For future tablejump instruction arrays for 3 byte pc devices.

       We don't relax jump/call instructions within these sections.  */

    *(.jumptables)

    *(.jumptables*)

    /* For code that needs to reside in the lower 128k progmem.  */

    *(.lowtext)

    *(.lowtext*)

     __ctors_start = . ;

     *(.ctors)

     __ctors_end = . ;

     __dtors_start = . ;

     *(.dtors)

     __dtors_end = . ;

    KEEP(SORT(*)(.ctors))

    KEEP(SORT(*)(.dtors))

    /* From this point on, we don't bother about wether the insns are

       below or above the 16 bits boundary.  */

    *(.init0)  /* Start here after reset.  */

    KEEP (*(.init0))

    *(.init1)

    KEEP (*(.init1))

    *(.init2)  /* Clear __zero_reg__, set up stack pointer.  */

    KEEP (*(.init2))

    *(.init3)

    KEEP (*(.init3))

    *(.init4)  /* Initialize data and BSS.  */

    KEEP (*(.init4))

    *(.init5)

    KEEP (*(.init5))

    *(.init6)  /* C++ constructors.  */

    KEEP (*(.init6))

    *(.init7)

    KEEP (*(.init7))

    *(.init8)

    KEEP (*(.init8))

    *(.init9)  /* Call main().  */

    KEEP (*(.init9))

    *(.text)

    . = ALIGN(2);

    *(.text.*)

    . = ALIGN(2);

    *(.fini9)  /* _exit() starts here.  */

    KEEP (*(.fini9))

    *(.fini8)

    KEEP (*(.fini8))

    *(.fini7)

    KEEP (*(.fini7))

    *(.fini6)  /* C++ destructors.  */

    KEEP (*(.fini6))

    *(.fini5)

    KEEP (*(.fini5))

    *(.fini4)

    KEEP (*(.fini4))

    *(.fini3)

    KEEP (*(.fini3))

    *(.fini2)

    KEEP (*(.fini2))

    *(.fini1)

    KEEP (*(.fini1))

    *(.fini0)  /* Infinite loop after program termination.  */

    KEEP (*(.fini0))

     _etext = . ;

  }  > text

  .data	  : AT (ADDR (.text) + SIZEOF (.text))

  {

     PROVIDE (__data_start = .) ;

    *(.data)

    *(.data*)

    *(.rodata)  /* We need to include .rodata here if gcc is used */

    *(.rodata*) /* with -fdata-sections.  */

    *(.gnu.linkonce.d*)

    . = ALIGN(2);

     _edata = . ;

     PROVIDE (__data_end = .) ;

  }  > data

  .bss  SIZEOF(.data) + ADDR(.data) :

  {

     PROVIDE (__bss_start = .) ;

    *(.bss)

    *(.bss*)

    *(COMMON)

     PROVIDE (__bss_end = .) ;

  }  > data

   __data_load_start = LOADADDR(.data);

   __data_load_end = __data_load_start + SIZEOF(.data);

  /* Global data not cleared after reset.  */

  .noinit  SIZEOF(.bss) + ADDR(.bss) :

  {

     PROVIDE (__noinit_start = .) ;

    *(.noinit*)

     PROVIDE (__noinit_end = .) ;

     _end = . ;

     PROVIDE (__heap_start = .) ;

  }  > data

  .eeprom  :

  {

    *(.eeprom*)

     __eeprom_end = . ;

  }  > eeprom

  .fuse  :

  {

    KEEP(*(.fuse))

    KEEP(*(.lfuse))

    KEEP(*(.hfuse))

    KEEP(*(.efuse))

  }  > fuse

  .lock  :

  {

    KEEP(*(.lock*))

  }  > lock

  .signature  :

  {

    KEEP(*(.signature*))

  }  > signature

  /* Stabs debugging sections.  */

  .stab 0 : { *(.stab) }

  .stabstr 0 : { *(.stabstr) }

  .stab.excl 0 : { *(.stab.excl) }

  .stab.exclstr 0 : { *(.stab.exclstr) }

  .stab.index 0 : { *(.stab.index) }

  .stab.indexstr 0 : { *(.stab.indexstr) }

  .comment 0 : { *(.comment) }

  /* DWARF debug sections.

     Symbols in the DWARF debugging sections are relative to the beginning

     of the section so we begin them at 0.  */

  /* DWARF 1 */

  .debug          0 : { *(.debug) }

  .line           0 : { *(.line) }

  /* GNU DWARF 1 extensions */

  .debug_srcinfo  0 : { *(.debug_srcinfo) }

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  /* DWARF 1.1 and DWARF 2 */

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  .debug_pubnames 0 : { *(.debug_pubnames) }

  /* DWARF 2 */

  .debug_info     0 : { *(.debug_info) *(.gnu.linkonce.wi.*) }

  .debug_abbrev   0 : { *(.debug_abbrev) }

  .debug_line     0 : { *(.debug_line) }

  .debug_frame    0 : { *(.debug_frame) }

  .debug_str      0 : { *(.debug_str) }

  .debug_loc      0 : { *(.debug_loc) }

  .debug_macinfo  0 : { *(.debug_macinfo) }

}