Added fault handler code which can be optionally compiled/linked for debugging.

firmware/common/fault_handler.c

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2012 Jared Boone
+ *
+ * This file is part of HackRF.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <stdint.h>
+
+__attribute__((naked))
+void hard_fault_handler(void) {
+	__asm__("TST LR, #4");
+	__asm__("ITE EQ");
+	__asm__("MRSEQ R0, MSP");
+	__asm__("MRSNE R0, PSP");
+	__asm__("B hard_fault_handler_c");
+}
+
+void hard_fault_handler_c(uint32_t* args) {
+	// args[0-7]: r0, r1, r2, r3, r12, lr, pc, psr
+	// Other interesting registers to examine:
+	//	CFSR: Configurable Fault Status Register
+	//	HFSR: Hard Fault Status Register
+	//	DFSR: Debug Fault Status Register
+	//  AFSR: Auxiliary Fault Status Register
+	//	MMAR: MemManage Fault Address Register
+	//	BFAR: Bus Fault Address Register
+	while(1);
+}
+
+void mem_manage_handler() {
+	while(1);
+}
+
+void bus_fault_handler() {
+	while(1);
+}
+
+void usage_fault_handler() {
+	while(1);
+}