*
* g return the value of the CPU registers hex data or ENN
* G set the value of the CPU registers OK or ENN
+ * P set the value of a single CPU register OK or ENN
*
* mAA..AA,LLLL Read LLLL bytes at address AA..AA hex data or ENN
* MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN
*
* ? What was the last sigval ? SNN (signal NN)
*
- * bBB..BB Set baud rate to BB..BB OK or BNN, then sets
- * baud rate
- *
* All commands and responses are sent with a packet which includes a
* checksum. A packet consists of
*
nasty interactions between app code and the stub (for instance if user steps
into strlen, etc..) */
-static int
-strlen (const char *s)
-{
- const char *s1 = s;
-
- while (*s1++ != '\000');
-
- return s1 - s;
-}
-
static char *
strcpy (char *dst, const char *src)
{
/* Convert ch from a hex digit to an int */
static int
-hex(ch)
- unsigned char ch;
+hex (unsigned char ch)
{
if (ch >= 'a' && ch <= 'f')
return ch-'a'+10;
return -1;
}
+static char remcomInBuffer[BUFMAX];
+static char remcomOutBuffer[BUFMAX];
+
/* scan for the sequence $<data>#<checksum> */
-static void
-getpacket(buffer)
- char *buffer;
+unsigned char *
+getpacket (void)
{
+ unsigned char *buffer = &remcomInBuffer[0];
unsigned char checksum;
unsigned char xmitcsum;
- int i;
int count;
- unsigned char ch;
+ char ch;
- do
+ while (1)
{
/* wait around for the start character, ignore all other characters */
- while ((ch = (getDebugChar() & 0x7f)) != '$') ;
+ while ((ch = getDebugChar ()) != '$')
+ ;
+retry:
checksum = 0;
xmitcsum = -1;
-
count = 0;
/* now, read until a # or end of buffer is found */
while (count < BUFMAX)
{
- ch = getDebugChar() & 0x7f;
+ ch = getDebugChar ();
+ if (ch == '$')
+ goto retry;
if (ch == '#')
break;
checksum = checksum + ch;
buffer[count] = ch;
count = count + 1;
}
-
- if (count >= BUFMAX)
- continue;
-
buffer[count] = 0;
if (ch == '#')
{
- xmitcsum = hex(getDebugChar() & 0x7f) << 4;
- xmitcsum |= hex(getDebugChar() & 0x7f);
-#if 0
- /* Humans shouldn't have to figure out checksums to type to it. */
- putDebugChar ('+');
- return;
-#endif
+ ch = getDebugChar ();
+ xmitcsum = hex (ch) << 4;
+ ch = getDebugChar ();
+ xmitcsum += hex (ch);
+
if (checksum != xmitcsum)
- putDebugChar('-'); /* failed checksum */
+ {
+ putDebugChar ('-'); /* failed checksum */
+ }
else
{
- putDebugChar('+'); /* successful transfer */
+ putDebugChar ('+'); /* successful transfer */
+
/* if a sequence char is present, reply the sequence ID */
if (buffer[2] == ':')
{
- putDebugChar(buffer[0]);
- putDebugChar(buffer[1]);
- /* remove sequence chars from buffer */
- count = strlen(buffer);
- for (i=3; i <= count; i++)
- buffer[i-3] = buffer[i];
+ putDebugChar (buffer[0]);
+ putDebugChar (buffer[1]);
+
+ return &buffer[3];
}
+
+ return &buffer[0];
}
}
}
- while (checksum != xmitcsum);
}
/* send the packet in buffer. */
static void
-putpacket(buffer)
- unsigned char *buffer;
+putpacket (unsigned char *buffer)
{
unsigned char checksum;
int count;
putDebugChar(hexchars[checksum & 0xf]);
}
- while ((getDebugChar() & 0x7f) != '+');
+ while (getDebugChar() != '+');
}
-static char remcomInBuffer[BUFMAX];
-static char remcomOutBuffer[BUFMAX];
-
/* Indicate to caller of mem2hex or hex2mem that there has been an
error. */
static volatile int mem_err = 0;
*/
static unsigned char *
-mem2hex(mem, buf, count, may_fault)
- unsigned char *mem;
- unsigned char *buf;
- int count;
- int may_fault;
+mem2hex (unsigned char *mem, unsigned char *buf, int count, int may_fault)
{
unsigned char ch;
* return a pointer to the character AFTER the last byte written */
static char *
-hex2mem(buf, mem, count, may_fault)
- unsigned char *buf;
- unsigned char *mem;
- int count;
- int may_fault;
+hex2mem (unsigned char *buf, unsigned char *mem, int count, int may_fault)
{
int i;
unsigned char ch;
/* Set up exception handlers for tracing and breakpoints */
void
-set_debug_traps()
+set_debug_traps (void)
{
struct hard_trap_info *ht;
if (ht->tt != 4 || ! (read_psr () & 0x1000))
exceptionHandler(ht->tt, trap_low);
- /* In case GDB is started before us, ack any packets (presumably
- "$?#xx") sitting there. */
-
- putDebugChar ('+');
-
initialized = 1;
}
");
static void
-set_mem_fault_trap(enable)
- int enable;
+set_mem_fault_trap (int enable)
{
extern void fltr_set_mem_err();
mem_err = 0;
");
static void
-get_in_break_mode()
+get_in_break_mode (void)
{
extern void dummy_hw_breakpoint();
/* Convert the SPARC hardware trap type code to a unix signal number. */
static int
-computeSignal(tt)
- int tt;
+computeSignal (int tt)
{
struct hard_trap_info *ht;
*/
static void
-handle_exception (registers)
- unsigned long *registers;
+handle_exception (unsigned long *registers)
{
int tt; /* Trap type */
int sigval;
{
remcomOutBuffer[0] = 0;
- getpacket(remcomInBuffer);
- switch (remcomInBuffer[0])
+ ptr = getpacket();
+ switch (*ptr++)
{
case '?':
remcomOutBuffer[0] = 'S';
psr = registers[PSR];
- ptr = &remcomInBuffer[1];
-
- if (remcomInBuffer[0] == 'P')
+ if (ptr[-1] == 'P')
{
int regno;
hex2mem (ptr, (char *)®isters[regno], 4, 0);
else
{
- strcpy (remcomOutBuffer, "P01");
+ strcpy (remcomOutBuffer, "E01");
break;
}
}
case 'm': /* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
/* Try to read %x,%x. */
- ptr = &remcomInBuffer[1];
-
if (hexToInt(&ptr, &addr)
&& *ptr++ == ','
&& hexToInt(&ptr, &length))
case 'M': /* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
/* Try to read '%x,%x:'. */
- ptr = &remcomInBuffer[1];
-
if (hexToInt(&ptr, &addr)
&& *ptr++ == ','
&& hexToInt(&ptr, &length)
case 'c': /* cAA..AA Continue at address AA..AA(optional) */
/* try to read optional parameter, pc unchanged if no parm */
-
- ptr = &remcomInBuffer[1];
if (hexToInt(&ptr, &addr))
{
registers[PC] = addr;
asm ("call 0
nop ");
break;
-
-#if 0
-Disabled until we can unscrew this properly
-
- case 'b': /* bBB... Set baud rate to BB... */
- {
- int baudrate;
- extern void set_timer_3();
-
- ptr = &remcomInBuffer[1];
- if (!hexToInt(&ptr, &baudrate))
- {
- strcpy(remcomOutBuffer,"B01");
- break;
- }
-
- /* Convert baud rate to uart clock divider */
- switch (baudrate)
- {
- case 38400:
- baudrate = 16;
- break;
- case 19200:
- baudrate = 33;
- break;
- case 9600:
- baudrate = 65;
- break;
- default:
- strcpy(remcomOutBuffer,"B02");
- goto x1;
- }
-
- putpacket("OK"); /* Ack before changing speed */
- set_timer_3(baudrate); /* Set it */
- }
-x1: break;
-#endif
} /* switch */
/* reply to the request */
the debugger. */
void
-breakpoint()
+breakpoint (void)
{
if (!initialized)
return;
projects / binutils.git / blobdiff