* It should use the same privilege level it runs at. It should
* install it as an interrupt gate so that interrupts are masked
* while the handler runs.
- * Also, need to assign exceptionHook and oldExceptionHook.
*
* Because gdb will sometimes write to the stack area to execute function
* calls, this program cannot rely on using the supervisor stack so it
*
* external low-level support routines
*/
-typedef void (*ExceptionHook)(int); /* pointer to function with int parm */
-typedef void (*Function)(); /* pointer to a function */
extern void putDebugChar(); /* write a single character */
extern int getDebugChar(); /* read and return a single char */
-
-extern Function exceptionHandler(); /* assign an exception handler */
-extern ExceptionHook exceptionHook; /* hook variable for errors/exceptions */
+extern void exceptionHandler(); /* assign an exception handler */
/************************************************************************/
/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/
int remcomStack[STACKSIZE/sizeof(int)];
static int* stackPtr = &remcomStack[STACKSIZE/sizeof(int) - 1];
-/*
- * In many cases, the system will want to continue exception processing
- * when a continue command is given.
- * oldExceptionHook is a function to invoke in this case.
- */
-
-static ExceptionHook oldExceptionHook;
-
/*************************** ASSEMBLY CODE MACROS *************************/
/* */
return (-1);
}
+static char remcomInBuffer[BUFMAX];
+static char remcomOutBuffer[BUFMAX];
+
/* scan for the sequence $<data>#<checksum> */
unsigned char *
-getpacket (buffer)
- unsigned char *buffer;
+getpacket ()
{
+ unsigned char *buffer = &remcomInBuffer[0];
unsigned char checksum;
unsigned char xmitcsum;
int count;
}
-char remcomInBuffer[BUFMAX];
-char remcomOutBuffer[BUFMAX];
-static short error;
-
-
void debug_error(format, parm)
char * format;
char * parm;
stepping = 0;
while (1==1) {
- error = 0;
remcomOutBuffer[0] = 0;
- ptr = getpacket(remcomInBuffer);
+ ptr = getpacket();
switch (*ptr++) {
case '?' : remcomOutBuffer[0] = 'S';
/* set the trace bit if we're stepping */
if (stepping) registers[ PS ] |= 0x100;
- /*
- * If we found a match for the PC AND we are not returning
- * as a result of a breakpoint (33),
- * trace exception (9), nmi (31), jmp to
- * the old exception handler as if this code never ran.
- */
-#if 0
- /* Don't really think we need this, except maybe for protection
- exceptions. */
- /*
- * invoke the previous handler.
- */
- if (oldExceptionHook)
- (*oldExceptionHook) (frame->exceptionVector);
- newPC = registers[ PC ]; /* pc may have changed */
-#endif /* 0 */
-
_returnFromException(); /* this is a jump */
-
break;
/* kill the program */
exceptionHandler (14, _catchException14);
exceptionHandler (16, _catchException16);
- if (exceptionHook != remcomHandler)
- {
- oldExceptionHook = exceptionHook;
- exceptionHook = remcomHandler;
- }
-
initialized = 1;
}