config: add device.x file to define default handlers

Adds default interrupt handler symbols in `device.x` file. Enables
weakly defined symbols that default to `DefaultHandler` implementations.
Handlers can be redefined, as in `examples/interrupt.rs`.

.cargo/config

@@ -2,6 +2,7 @@
 runner = 'riscv64-unknown-elf-gdb -x openocd.gdb'
 rustflags = [
   "-C", "link-arg=-Tmemory-c8.x",
+  "-C", "link-arg=-Tdevice.x",
   "-C", "link-arg=-Tlink.x",
 ]
 

device.x

@@ -0,0 +1,64 @@
+PROVIDE(INT_SFT = DefaultHandler);
+PROVIDE(INT_TMR = DefaultHandler);
+PROVIDE(INT_BWEI = DefaultHandler);
+PROVIDE(INT_PMOVI = DefaultHandler);
+PROVIDE(WWDGT = DefaultHandler);
+PROVIDE(EXTI_LVD = DefaultHandler);
+PROVIDE(TAMPER = DefaultHandler);
+PROVIDE(RTC = DefaultHandler);
+PROVIDE(FMC = DefaultHandler);
+PROVIDE(RCU = DefaultHandler);
+PROVIDE(EXTI_LINE0 = DefaultHandler);
+PROVIDE(EXTI_LINE1 = DefaultHandler);
+PROVIDE(EXTI_LINE2 = DefaultHandler);
+PROVIDE(EXTI_LINE3 = DefaultHandler);
+PROVIDE(EXTI_LINE4 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL0 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL1 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL2 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL3 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL4 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL5 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL6 = DefaultHandler);
+PROVIDE(ADC0_1 = DefaultHandler);
+PROVIDE(CAN0_TX = DefaultHandler);
+PROVIDE(CAN0_RX0 = DefaultHandler);
+PROVIDE(CAN0_RX1 = DefaultHandler);
+PROVIDE(CAN0_EWMC = DefaultHandler);
+PROVIDE(EXTI_LINE9_5 = DefaultHandler);
+PROVIDE(TIMER0_BRK = DefaultHandler);
+PROVIDE(TIMER0_UP = DefaultHandler);
+PROVIDE(TIMER0_TRG_CMT = DefaultHandler);
+PROVIDE(TIMER0_CHANNEL = DefaultHandler);
+PROVIDE(TIMER1 = DefaultHandler);
+PROVIDE(TIMER2 = DefaultHandler);
+PROVIDE(TIMER3 = DefaultHandler);
+PROVIDE(I2C0_EV = DefaultHandler);
+PROVIDE(I2C0_ER = DefaultHandler);
+PROVIDE(I2C1_EV = DefaultHandler);
+PROVIDE(I2C1_ER = DefaultHandler);
+PROVIDE(SPI0 = DefaultHandler);
+PROVIDE(SPI1 = DefaultHandler);
+PROVIDE(USART0 = DefaultHandler);
+PROVIDE(USART1 = DefaultHandler);
+PROVIDE(USART2 = DefaultHandler);
+PROVIDE(EXTI_LINE15_10 = DefaultHandler);
+PROVIDE(RTC_ALARM = DefaultHandler);
+PROVIDE(USBFS_WKUP = DefaultHandler);
+PROVIDE(TIMER4 = DefaultHandler);
+PROVIDE(SPI2 = DefaultHandler);
+PROVIDE(UART3 = DefaultHandler);
+PROVIDE(UART4 = DefaultHandler);
+PROVIDE(TIMER5 = DefaultHandler);
+PROVIDE(TIMER6 = DefaultHandler);
+PROVIDE(DMA1_CHANNEL0 = DefaultHandler);
+PROVIDE(DMA1_CHANNEL1 = DefaultHandler);
+PROVIDE(DMA1_CHANNEL2 = DefaultHandler);
+PROVIDE(DMA1_CHANNEL3 = DefaultHandler);
+PROVIDE(DMA1_CHANNEL4 = DefaultHandler);
+PROVIDE(CAN1_TX = DefaultHandler);
+PROVIDE(CAN1_RX0 = DefaultHandler);
+PROVIDE(CAN1_RX1 = DefaultHandler);
+PROVIDE(CAN1_EWMC = DefaultHandler);
+PROVIDE(USBFS = DefaultHandler);
+