File content as of revision 0:02dd72d1d465:

;/*****************************************************************************
; * @file     startup_SAMR21.s
; * @brief    CMSIS Cortex-M0+ Core Device Startup File for
; *           Atmel SAMR21 Device Series
; * @version  V1.00
; * @date     24. February 2014
; *
; * @note
; * Copyright (C) 2014 ARM Limited. All rights reserved.
; *
; * @par
; * ARM Limited (ARM) is supplying this software for use with Cortex-M
; * processor based microcontrollers.  This file can be freely distributed
; * within development tools that are supporting such ARM based processors.
; *
; * @par
; * THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
; * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
; * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
; * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
; * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
; *
; ******************************************************************************/
__initial_sp        EQU     0x20008000  ; Top of RAM

                PRESERVE8
                THUMB


; Vector Table Mapped to Address 0 at Reset

                AREA    RESET, DATA, READONLY
                EXPORT  __Vectors
                EXPORT  __Vectors_End
                EXPORT  __Vectors_Size

__Vectors       DCD     __initial_sp              ; Top of Stack
                DCD     Reset_Handler             ; Reset Handler
                DCD     NMI_Handler               ; NMI Handler
                DCD     HardFault_Handler         ; Hard Fault Handler
                DCD     0                         ; Reserved
                DCD     0                         ; Reserved
                DCD     0                         ; Reserved
                DCD     0                         ; Reserved
                DCD     0                         ; Reserved
                DCD     0                         ; Reserved
                DCD     0                         ; Reserved
                DCD     SVC_Handler               ; SVCall Handler
                DCD     0                         ; Reserved
                DCD     0                         ; Reserved
                DCD     PendSV_Handler            ; PendSV Handler
                DCD     SysTick_Handler           ; SysTick Handler

                ; External Interrupts
                DCD     PM_Handler                ;  0 Power Manager
                DCD     SYSCTRL_Handler           ;  1 System Control
                DCD     WDT_Handler               ;  2 Watchdog Timer
                DCD     RTC_Handler               ;  3 Real-Time Counter
                DCD     EIC_Handler               ;  4 External Interrupt Controller
                DCD     NVMCTRL_Handler           ;  5 Non-Volatile Memory Controller
                DCD     DMAC_Handler              ;  6 Direct Memory Access Controller
                DCD     USB_Handler               ;  7 Universal Serial Bus
                DCD     EVSYS_Handler             ;  8 Event System Interface
                DCD     SERCOM0_Handler           ;  9 Serial Communication Interface 0
                DCD     SERCOM1_Handler           ; 10 Serial Communication Interface 1
                DCD     SERCOM2_Handler           ; 11 Serial Communication Interface 2
                DCD     SERCOM3_Handler           ; 12 Serial Communication Interface 3
                DCD     SERCOM4_Handler           ; 13 Serial Communication Interface 4
                DCD     SERCOM5_Handler           ; 14 Serial Communication Interface 5
                DCD     TCC0_Handler              ; 15 Timer Counter Control 0
                DCD     TCC1_Handler              ; 16 Timer Counter Control 1
                DCD     TCC2_Handler              ; 17 Timer Counter Control 2
                DCD     TC3_Handler               ; 18 Basic Timer Counter 0
                DCD     TC4_Handler               ; 19 Basic Timer Counter 1
                DCD     TC5_Handler               ; 20 Basic Timer Counter 2
                DCD     TC6_Handler               ; 21 Basic Timer Counter 3
                DCD     TC7_Handler               ; 22 Basic Timer Counter 4
                DCD     ADC_Handler               ; 23 Analog Digital Converter
                DCD     AC_Handler                ; 24 Analog Comparators
                DCD     DAC_Handler               ; 25 Digital Analog Converter
                DCD     PTC_Handler               ; 26 Peripheral Touch Controller
                DCD     I2S_Handler               ; 27 Inter-IC Sound Interface
__Vectors_End

__Vectors_Size  EQU  __Vectors_End - __Vectors

                AREA    |.text|, CODE, READONLY


; Reset Handler

Reset_Handler   PROC
                EXPORT Reset_Handler                    [WEAK]
                IMPORT SystemInit
                IMPORT __main
                LDR     R0, =SystemInit
                BLX     R0
                LDR     R0, =__main
                BX      R0
                ENDP

; Dummy Exception Handlers (infinite loops which can be modified)

NMI_Handler     PROC
                EXPORT  NMI_Handler               [WEAK]
                B       .
                ENDP
HardFault_Handler\
                PROC
                EXPORT  HardFault_Handler         [WEAK]
                B       .
                ENDP
SVC_Handler     PROC
                EXPORT  SVC_Handler               [WEAK]
                B       .
                ENDP
PendSV_Handler  PROC
                EXPORT  PendSV_Handler            [WEAK]
                B       .
                ENDP
SysTick_Handler PROC
                EXPORT  SysTick_Handler           [WEAK]
                B       .
                ENDP

Default_Handler PROC
                EXPORT  PM_Handler                [WEAK]
                EXPORT  SYSCTRL_Handler           [WEAK]
                EXPORT  WDT_Handler               [WEAK]
                EXPORT  RTC_Handler               [WEAK]
                EXPORT  EIC_Handler               [WEAK]
                EXPORT  NVMCTRL_Handler           [WEAK]
                EXPORT  DMAC_Handler              [WEAK]
                EXPORT  USB_Handler               [WEAK]
                EXPORT  EVSYS_Handler             [WEAK]
                EXPORT  SERCOM0_Handler           [WEAK]
                EXPORT  SERCOM1_Handler           [WEAK]
                EXPORT  SERCOM2_Handler           [WEAK]
                EXPORT  SERCOM3_Handler           [WEAK]
                EXPORT  SERCOM4_Handler           [WEAK]
                EXPORT  SERCOM5_Handler           [WEAK]
                EXPORT  TCC0_Handler              [WEAK]
                EXPORT  TCC1_Handler              [WEAK]
                EXPORT  TCC2_Handler              [WEAK]
                EXPORT  TC3_Handler               [WEAK]
                EXPORT  TC4_Handler               [WEAK]
                EXPORT  TC5_Handler               [WEAK]
                EXPORT  TC6_Handler               [WEAK]
                EXPORT  TC7_Handler               [WEAK]
                EXPORT  ADC_Handler               [WEAK]
                EXPORT  AC_Handler                [WEAK]
                EXPORT  DAC_Handler               [WEAK]
                EXPORT  PTC_Handler               [WEAK]
                EXPORT  I2S_Handler               [WEAK]

PM_Handler
SYSCTRL_Handler
WDT_Handler
RTC_Handler
EIC_Handler
NVMCTRL_Handler
DMAC_Handler
USB_Handler
EVSYS_Handler
SERCOM0_Handler
SERCOM1_Handler
SERCOM2_Handler
SERCOM3_Handler
SERCOM4_Handler
SERCOM5_Handler
TCC0_Handler
TCC1_Handler
TCC2_Handler
TC3_Handler
TC4_Handler
TC5_Handler
TC6_Handler
TC7_Handler
ADC_Handler
AC_Handler
DAC_Handler
PTC_Handler
I2S_Handler
                B       .
                ENDP


                ALIGN
                END