Fix exception handlers not being included during linking.

1 files changed, 43 insertions, 0 deletions

diff --git a/src/exc.c b/src/exc.c
new file mode 100644
index 0000000..707d3b0
--- /dev/null
+++ b/src/exc.c
@@ -0,0 +1,43 @@
+#include <stdio.h>
+
+#include "isr_vector.h"
+#include "panic.h"
+
+#include "ch573/gpio.h"
+
+#define GPIO_PORT_A ch573_gpio__gpio_port_a
+#define GPIO_PORT CH573_GPIO__GPIO_PORT_T_INTF
+
+void delay();
+
+IRQ(exc)
+{
+  uint32_t mcause, mepc, mtval, *sp;
+
+  asm volatile("csrr %0, mcause" : "=r"(mcause));
+  asm volatile("csrr %0, mepc" : "=r"(mepc));
+  asm volatile("csrr %0, mtval" : "=r"(mtval));
+
+  printf("Hardware Exception Caught:\n");
+  printf("  mcause: 0x%80x\n", mcause);
+  printf("    mepc: 0x%80x\n", mepc);
+  printf("   mtval: 0x%80x\n", mtval);
+
+  panic(mcause);
+}
+
+IRQ(nmi)
+{
+  uint32_t mcause, mepc, mtval, *sp;
+
+  asm volatile("csrr %0, mcause" : "=r"(mcause));
+  asm volatile("csrr %0, mepc" : "=r"(mepc));
+  asm volatile("csrr %0, mtval" : "=r"(mtval));
+
+  printf("Unhandled NMI Caught:\n");
+  printf("  mcause: 0x%80x\n", mcause);
+  printf("    mepc: 0x%80x\n", mepc);
+  printf("   mtval: 0x%80x\n", mtval);
+
+  panic(mcause);
+}