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Diffstat (limited to 'gdb/sparc-stub.c')
-rw-r--r--gdb/sparc-stub.c72
1 files changed, 31 insertions, 41 deletions
diff --git a/gdb/sparc-stub.c b/gdb/sparc-stub.c
index 5769b25d4c8..8e88e56bb9e 100644
--- a/gdb/sparc-stub.c
+++ b/gdb/sparc-stub.c
@@ -286,70 +286,68 @@ hex(ch)
/* scan for the sequence $<data>#<checksum> */
-static void
-getpacket(buffer)
- char *buffer;
+unsigned char *
+getpacket (buffer)
+ unsigned char *buffer;
{
unsigned char checksum;
unsigned char xmitcsum;
- int i;
int count;
- unsigned char ch;
+ char ch;
- do
+ while (1)
{
/* wait around for the start character, ignore all other characters */
- while ((ch = (getDebugChar() & 0x7f)) != '$') ;
+ 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. */
@@ -381,7 +379,7 @@ putpacket(buffer)
putDebugChar(hexchars[checksum & 0xf]);
}
- while ((getDebugChar() & 0x7f) != '+');
+ while (getDebugChar() != '+');
}
static char remcomInBuffer[BUFMAX];
@@ -655,8 +653,8 @@ handle_exception (registers)
{
remcomOutBuffer[0] = 0;
- getpacket(remcomInBuffer);
- switch (remcomInBuffer[0])
+ ptr = getpacket(remcomInBuffer);
+ switch (*ptr++)
{
case '?':
remcomOutBuffer[0] = 'S';
@@ -665,8 +663,7 @@ handle_exception (registers)
remcomOutBuffer[3] = 0;
break;
- case 'd':
- /* toggle debug flag */
+ case 'd': /* toggle debug flag */
break;
case 'g': /* return the value of the CPU registers */
@@ -688,7 +685,6 @@ handle_exception (registers)
psr = registers[PSR];
- ptr = &remcomInBuffer[1];
hex2mem(ptr, (char *)registers, 16 * 4, 0); /* G & O regs */
hex2mem(ptr + 16 * 4 * 2, sp + 0, 16 * 4, 0); /* L & I regs */
hex2mem(ptr + 64 * 4 * 2, (char *)&registers[Y],
@@ -714,8 +710,6 @@ handle_exception (registers)
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))
@@ -732,8 +726,6 @@ handle_exception (registers)
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)
@@ -751,7 +743,6 @@ handle_exception (registers)
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;
@@ -787,7 +778,6 @@ Disabled until we can unscrew this properly
int baudrate;
extern void set_timer_3();
- ptr = &remcomInBuffer[1];
if (!hexToInt(&ptr, &baudrate))
{
strcpy(remcomOutBuffer,"B01");