From 65f00a69c74ca0def8d7f1d7597327945a04a33f Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@bug.st>
Date: Mon, 19 Nov 2012 23:37:19 +0100
Subject: [PATCH] Fixed weak-symbol issue with system interrupt handlers.

---
 .../sam/cores/arduino/cortex_handlers.c       | 127 +++++++++++++-----
 hardware/arduino/sam/cores/arduino/hooks.c    |  27 ++++
 hardware/arduino/sam/cores/arduino/wiring.c   |  12 --
 .../ATMEL/sam3xa/source/gcc/startup_sam3xa.c  |  91 +------------
 .../arduino_due_x/libsam_sam3x8e_gcc_rel.a    | Bin 86302 -> 85290 bytes
 .../libsam_sam3x8e_gcc_rel.a.txt              | 101 +++++++-------
 6 files changed, 171 insertions(+), 187 deletions(-)

diff --git a/hardware/arduino/sam/cores/arduino/cortex_handlers.c b/hardware/arduino/sam/cores/arduino/cortex_handlers.c
index 924110b90..bf0a69c97 100644
--- a/hardware/arduino/sam/cores/arduino/cortex_handlers.c
+++ b/hardware/arduino/sam/cores/arduino/cortex_handlers.c
@@ -17,50 +17,109 @@
 */
 
 #include "Arduino.h"
+#include "Reset.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-void NMI_Handler( void )
-{
-  for ( ;; ) ;
+static void __halt() {
+	// Halts
+	while (1)
+		;
 }
 
-void HardFault_Handler( void )
+extern void svcHook(void);
+extern void pendSVHook(void);
+extern int sysTickHook(void);
+
+/* Cortex-M3 core handlers */
+void NMI_Handler       (void) __attribute__ ((weak, alias("__halt")));
+void HardFault_Handler (void) __attribute__ ((weak, alias("__halt")));
+void MemManage_Handler (void) __attribute__ ((weak, alias("__halt")));
+void BusFault_Handler  (void) __attribute__ ((weak, alias("__halt")));
+void UsageFault_Handler(void) __attribute__ ((weak, alias("__halt")));
+void DebugMon_Handler  (void) __attribute__ ((weak, alias("__halt")));
+void SVC_Handler       (void) { svcHook(); }
+void PendSV_Handler    (void) {	pendSVHook(); }
+
+void SysTick_Handler(void)
 {
-  for ( ;; ) ;
+	if (sysTickHook())
+		return;
+
+	tickReset();
+
+	// Increment tick count each ms
+	TimeTick_Increment();
 }
 
-void MemManage_Handler( void )
-{
-  for ( ;; ) ;
-}
-
-void BusFault_Handler( void )
-{
-  for ( ;; ) ;
-}
-
-void UsageFault_Handler( void )
-{
-  for ( ;; ) ;
-}
-
-void SVC_Handler( void )
-{
-  for ( ;; ) ;
-}
-
-void DebugMon_Handler( void )
-{
-  for ( ;; ) ;
-}
-
-void PendSV_Handler( void )
-{
-  for ( ;; ) ;
-}
+/* Peripherals handlers */
+void SUPC_Handler       (void) __attribute__ ((weak, alias("__halt")));
+void RSTC_Handler       (void) __attribute__ ((weak, alias("__halt")));
+void RTC_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void RTT_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void WDT_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void PMC_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void EFC0_Handler       (void) __attribute__ ((weak, alias("__halt")));
+void EFC1_Handler       (void) __attribute__ ((weak, alias("__halt")));
+void UART_Handler       (void) __attribute__ ((weak, alias("__halt")));
+#ifdef _SAM3XA_SMC_INSTANCE_
+void SMC_Handler        (void) __attribute__ ((weak, alias("__halt")));
+#endif
+#ifdef _SAM3XA_SDRAMC_INSTANCE_
+void SDRAMC_Handler     (void) __attribute__ ((weak, alias("__halt")));
+#endif
+void PIOA_Handler       (void) __attribute__ ((weak, alias("__halt")));
+void PIOB_Handler       (void) __attribute__ ((weak, alias("__halt")));
+#ifdef _SAM3XA_PIOC_INSTANCE_
+void PIOC_Handler       (void) __attribute__ ((weak, alias("__halt")));
+#endif
+#ifdef _SAM3XA_PIOD_INSTANCE_
+void PIOD_Handler       (void) __attribute__ ((weak, alias("__halt")));
+#endif
+#ifdef _SAM3XA_PIOE_INSTANCE_
+void PIOE_Handler       (void) __attribute__ ((weak, alias("__halt")));
+#endif
+#ifdef _SAM3XA_PIOF_INSTANCE_
+void PIOF_Handler       (void) __attribute__ ((weak, alias("__halt")));
+#endif
+void USART0_Handler     (void) __attribute__ ((weak, alias("__halt")));
+void USART1_Handler     (void) __attribute__ ((weak, alias("__halt")));
+void USART2_Handler     (void) __attribute__ ((weak, alias("__halt")));
+#ifdef _SAM3XA_USART3_INSTANCE_
+void USART3_Handler     (void) __attribute__ ((weak, alias("__halt")));
+#endif
+void HSMCI_Handler      (void) __attribute__ ((weak, alias("__halt")));
+void TWI0_Handler       (void) __attribute__ ((weak, alias("__halt")));
+void TWI1_Handler       (void) __attribute__ ((weak, alias("__halt")));
+void SPI0_Handler       (void) __attribute__ ((weak, alias("__halt")));
+#ifdef _SAM3XA_SPI1_INSTANCE_
+void SPI1_Handler       (void) __attribute__ ((weak, alias("__halt")));
+#endif
+void SSC_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void TC0_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void TC1_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void TC2_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void TC3_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void TC4_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void TC5_Handler        (void) __attribute__ ((weak, alias("__halt")));
+#ifdef _SAM3XA_TC2_INSTANCE_
+void TC6_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void TC7_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void TC8_Handler        (void) __attribute__ ((weak, alias("__halt")));
+#endif
+void PWM_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void ADC_Handler        (void) __attribute__ ((weak, alias("__halt")));
+void DACC_Handler       (void) __attribute__ ((weak, alias("__halt")));
+void DMAC_Handler       (void) __attribute__ ((weak, alias("__halt")));
+void UOTGHS_Handler     (void) __attribute__ ((weak, alias("__halt")));
+void TRNG_Handler       (void) __attribute__ ((weak, alias("__halt")));
+#ifdef _SAM3XA_EMAC_INSTANCE_
+void EMAC_Handler       (void) __attribute__ ((weak, alias("__halt")));
+#endif
+void CAN0_Handler       (void) __attribute__ ((weak, alias("__halt")));
+void CAN1_Handler       (void) __attribute__ ((weak, alias("__halt")));
 
 #ifdef __cplusplus
 }
diff --git a/hardware/arduino/sam/cores/arduino/hooks.c b/hardware/arduino/sam/cores/arduino/hooks.c
index 641eabc73..aa16d1190 100644
--- a/hardware/arduino/sam/cores/arduino/hooks.c
+++ b/hardware/arduino/sam/cores/arduino/hooks.c
@@ -29,3 +29,30 @@ static void __empty() {
 	// Empty
 }
 void yield(void) __attribute__ ((weak, alias("__empty")));
+
+/**
+ * SysTick hook
+ *
+ * This function is called from SysTick handler, before the default
+ * handler provided by Arduino.
+ */
+static int __false() {
+	// Return false
+	return 0;
+}
+int sysTickHook(void) __attribute__ ((weak, alias("__false")));
+
+/**
+ * SVC hook
+ * PendSV hook
+ *
+ * These functions are called from SVC handler, and PensSV handler.
+ * Default action is halting.
+ */
+static void __halt() {
+	// Halts
+	while (1)
+		;
+}
+void svcHook(void)    __attribute__ ((weak, alias("__halt")));
+void pendSVHook(void) __attribute__ ((weak, alias("__halt")));
diff --git a/hardware/arduino/sam/cores/arduino/wiring.c b/hardware/arduino/sam/cores/arduino/wiring.c
index e7400bf3d..431761b44 100644
--- a/hardware/arduino/sam/cores/arduino/wiring.c
+++ b/hardware/arduino/sam/cores/arduino/wiring.c
@@ -17,7 +17,6 @@
 */
 
 #include "Arduino.h"
-#include "Reset.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -57,17 +56,6 @@ void delayMicroseconds( uint32_t us )
         ;
 }
 
-/*
- * Cortex-M3 Systick IT handler: MOVED TO MAIN DUE TO WEAK SYMBOL ISSUE NOT RESOLVED
- */
-void SysTick_Handler( void )
-{
-	tickReset();
-
-	// Increment tick count each ms
-	TimeTick_Increment() ;
-}
-
 #if defined ( __ICCARM__ ) /* IAR Ewarm 5.41+ */
 extern signed int putchar( signed int c ) ;
 /**
diff --git a/hardware/arduino/sam/system/CMSIS/Device/ATMEL/sam3xa/source/gcc/startup_sam3xa.c b/hardware/arduino/sam/system/CMSIS/Device/ATMEL/sam3xa/source/gcc/startup_sam3xa.c
index 224edaef3..698df1d9a 100644
--- a/hardware/arduino/sam/system/CMSIS/Device/ATMEL/sam3xa/source/gcc/startup_sam3xa.c
+++ b/hardware/arduino/sam/system/CMSIS/Device/ATMEL/sam3xa/source/gcc/startup_sam3xa.c
@@ -47,86 +47,7 @@ int main(void);
 // Arduino: we must setup hardware before doing this
 // void __libc_init_array(void);
 
-/* Default empty handler */
-void Dummy_Handler(void);
-
-/* Cortex-M3 core handlers */
-void NMI_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void HardFault_Handler  ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void MemManage_Handler  ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void BusFault_Handler   ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void UsageFault_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void SVC_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void DebugMon_Handler   ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void PendSV_Handler     ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void SysTick_Handler    ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-
-/* Peripherals handlers */
-void SUPC_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void RSTC_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void RTC_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void RTT_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void WDT_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void PMC_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void EFC0_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void EFC1_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void UART_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#ifdef _SAM3XA_SMC_INSTANCE_
-void SMC_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#endif /* _SAM3XA_SMC_INSTANCE_ */
-#ifdef _SAM3XA_SDRAMC_INSTANCE_
-void SDRAMC_Handler     ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#endif /* _SAM3XA_SDRAMC_INSTANCE_ */
-void PIOA_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void PIOB_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#ifdef _SAM3XA_PIOC_INSTANCE_
-void PIOC_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#endif /* _SAM3XA_PIOC_INSTANCE_ */
-#ifdef _SAM3XA_PIOD_INSTANCE_
-void PIOD_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#endif /* _SAM3XA_PIOD_INSTANCE_ */
-#ifdef _SAM3XA_PIOE_INSTANCE_
-void PIOE_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#endif /* _SAM3XA_PIOE_INSTANCE_ */
-#ifdef _SAM3XA_PIOF_INSTANCE_
-void PIOF_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#endif /* _SAM3XA_PIOF_INSTANCE_ */
-void USART0_Handler     ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void USART1_Handler     ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void USART2_Handler     ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#ifdef _SAM3XA_USART3_INSTANCE_
-void USART3_Handler     ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#endif /* _SAM3XA_USART3_INSTANCE_ */
-void HSMCI_Handler      ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void TWI0_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void TWI1_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void SPI0_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#ifdef _SAM3XA_SPI1_INSTANCE_
-void SPI1_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#endif /* _SAM3XA_SPI1_INSTANCE_ */
-void SSC_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void TC0_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void TC1_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void TC2_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void TC3_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void TC4_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void TC5_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#ifdef _SAM3XA_TC2_INSTANCE_
-void TC6_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void TC7_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void TC8_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#endif /* _SAM3XA_TC2_INSTANCE_ */
-void PWM_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void ADC_Handler        ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void DACC_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void DMAC_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void UOTGHS_Handler     ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void TRNG_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#ifdef _SAM3XA_EMAC_INSTANCE_
-void EMAC_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-#endif /* _SAM3XA_EMAC_INSTANCE_ */
-void CAN0_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
-void CAN1_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+// Arduino: handlers weak symbols moved into main
 
 /* Exception Table */
 __attribute__ ((section(".vectors")))
@@ -283,13 +204,3 @@ void Reset_Handler(void)
 	/* Infinite loop */
 	while (1);
 }
-
-/**
- * \brief Default interrupt handler for unused IRQs.
- */
-void Dummy_Handler(void)
-{
-	while (1) {
-	}
-}
-
diff --git a/hardware/arduino/sam/variants/arduino_due_x/libsam_sam3x8e_gcc_rel.a b/hardware/arduino/sam/variants/arduino_due_x/libsam_sam3x8e_gcc_rel.a
index 822990651270eb1ce2ed99bfa977cfe85551ed13..390d2532e79be39d2f0dc6e8cb78087ff48162e4 100644
GIT binary patch
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diff --git a/hardware/arduino/sam/variants/arduino_due_x/libsam_sam3x8e_gcc_rel.a.txt b/hardware/arduino/sam/variants/arduino_due_x/libsam_sam3x8e_gcc_rel.a.txt
index 1854c378a..600f00497 100644
--- a/hardware/arduino/sam/variants/arduino_due_x/libsam_sam3x8e_gcc_rel.a.txt
+++ b/hardware/arduino/sam/variants/arduino_due_x/libsam_sam3x8e_gcc_rel.a.txt
@@ -236,58 +236,57 @@ system_sam3xa.o:
 00000000 T system_init_flash
 
 startup_sam3xa.o:
-00000000 W ADC_Handler
-00000000 W BusFault_Handler
-00000000 W CAN0_Handler
-00000000 W CAN1_Handler
-00000000 W DACC_Handler
-00000000 W DMAC_Handler
-00000000 W DebugMon_Handler
-00000000 T Dummy_Handler
-00000000 W EFC0_Handler
-00000000 W EFC1_Handler
-00000000 W EMAC_Handler
-00000000 W HSMCI_Handler
-00000000 W HardFault_Handler
-00000000 W MemManage_Handler
-00000000 W NMI_Handler
-00000000 W PIOA_Handler
-00000000 W PIOB_Handler
-00000000 W PIOC_Handler
-00000000 W PIOD_Handler
-00000000 W PMC_Handler
-00000000 W PWM_Handler
-00000000 W PendSV_Handler
-00000000 W RSTC_Handler
-00000000 W RTC_Handler
-00000000 W RTT_Handler
+         U ADC_Handler
+         U BusFault_Handler
+         U CAN0_Handler
+         U CAN1_Handler
+         U DACC_Handler
+         U DMAC_Handler
+         U DebugMon_Handler
+         U EFC0_Handler
+         U EFC1_Handler
+         U EMAC_Handler
+         U HSMCI_Handler
+         U HardFault_Handler
+         U MemManage_Handler
+         U NMI_Handler
+         U PIOA_Handler
+         U PIOB_Handler
+         U PIOC_Handler
+         U PIOD_Handler
+         U PMC_Handler
+         U PWM_Handler
+         U PendSV_Handler
+         U RSTC_Handler
+         U RTC_Handler
+         U RTT_Handler
 00000000 T Reset_Handler
-00000000 W SMC_Handler
-00000000 W SPI0_Handler
-00000000 W SSC_Handler
-00000000 W SUPC_Handler
-00000000 W SVC_Handler
-00000000 W SysTick_Handler
-00000000 W TC0_Handler
-00000000 W TC1_Handler
-00000000 W TC2_Handler
-00000000 W TC3_Handler
-00000000 W TC4_Handler
-00000000 W TC5_Handler
-00000000 W TC6_Handler
-00000000 W TC7_Handler
-00000000 W TC8_Handler
-00000000 W TRNG_Handler
-00000000 W TWI0_Handler
-00000000 W TWI1_Handler
-00000000 W UART_Handler
-00000000 W UOTGHS_Handler
-00000000 W USART0_Handler
-00000000 W USART1_Handler
-00000000 W USART2_Handler
-00000000 W USART3_Handler
-00000000 W UsageFault_Handler
-00000000 W WDT_Handler
+         U SMC_Handler
+         U SPI0_Handler
+         U SSC_Handler
+         U SUPC_Handler
+         U SVC_Handler
+         U SysTick_Handler
+         U TC0_Handler
+         U TC1_Handler
+         U TC2_Handler
+         U TC3_Handler
+         U TC4_Handler
+         U TC5_Handler
+         U TC6_Handler
+         U TC7_Handler
+         U TC8_Handler
+         U TRNG_Handler
+         U TWI0_Handler
+         U TWI1_Handler
+         U UART_Handler
+         U UOTGHS_Handler
+         U USART0_Handler
+         U USART1_Handler
+         U USART2_Handler
+         U USART3_Handler
+         U UsageFault_Handler
+         U WDT_Handler
          U _erelocate
          U _estack
          U _etext