- don't optimize away gdb

- GCC 4.92
- cleaned up



git-svn-id: http://moon:8086/svn/mips@107 a8ebac50-d88d-4704-bea3-6648445a41b3

src/bootloader/boards/denano/board.c

@@ -13,7 +13,7 @@
 extern uart_if_t uart_if[];
 extern void handle_exception (unsigned long *registers);
 
-int gdb_stub(struct xcptcontext * xcp) __attribute__ ((section (".gdb")));
+extern int gdb_stub(struct xcptcontext * xcp) __attribute__ ((section (".gdb"))) __attribute__ ((used));
 int gdb_stub(struct xcptcontext * xcp)
 {
 	handle_exception((unsigned long *)xcp);

src/libsys/boards/denano/board.c

@@ -41,13 +41,11 @@ const con_if_t con_if =
 	con_if_entry, ARRAYSIZE(con_if_entry)
 };
 
-static uart_if_t const *dbg_uart = NULL;
-
 void dbg_uart_isr(struct xcptcontext *xcp)
 {
-	if(SYS_UART_BIT_RX_AVAIL & *dbg_uart->pCTRL)
+	if(SYS_UART_BIT_RX_AVAIL & *uart_if[UART_DEBUGGER].pCTRL)
 	{
-		char c = *dbg_uart->pDATA;
+		char c = *uart_if[UART_DEBUGGER].pDATA;
 		if (c == 3)
 		{
 			dbg_func(xcp);

src/libsys/boards/ml402/board.c

@@ -41,13 +41,11 @@ const con_if_t con_if =
 	con_if_entry, ARRAYSIZE(con_if_entry)
 };
 
-static uart_if_t const *dbg_uart = NULL;
-
 void dbg_uart_isr(struct xcptcontext *xcp)
 {
-	if(SYS_UART_BIT_RX_AVAIL & *dbg_uart->pCTRL)
+	if(SYS_UART_BIT_RX_AVAIL & *uart_if[UART_DEBUGGER].pCTRL)
 	{
-		char c = *dbg_uart->pDATA;
+		char c = *uart_if[UART_DEBUGGER].pDATA;
 		if (c == 3)
 		{
 			dbg_func(xcp);

src/libsys/gdb_stub.c

@@ -424,10 +424,10 @@ handle_exception (unsigned long *registers)
 	char *ptr;
 	unsigned long *sp;
 	
-	unsigned long *pAddr = (unsigned long *)registers[PC];
+	addr = *((unsigned long *)registers[PC]);
 	
 	// is break
-	if (isBreak(*pAddr))
+	if (isBreak(addr))
 	{
 		registers[PC] += 4;
 	}