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2005-05-12 Orjan Friberg <orjanf@axis.com>

Browse source 
* target.h (struct target_ops): Add insert_watchpoint,
	remove_watchpoint, stopped_by_watchpoint, stopped_data_address function
	pointers for hardware watchpoint support.
	* linux-low.h (struct linux_target_ops): Ditto.
	* linux-low.c (linux_insert_watchpoint, linux_remove_watchpoint)
	(linux_stopped_by_watchpoint, linux_stopped_data_address): New.  Add
	to linux_target_ops.
	* remote-utils.c (prepare_resume_reply): Add watchpoint information to
	reply packet.
	* server.c (main): Recognize 'Z' and 'z' packets.
This commit is contained in:
Orjan Friberg 2005-05-12 12:14:23 +00:00
parent 119b882a3d
commit e013ee27c9
6 changed files with 168 additions and 1 deletions
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13
gdb/gdbserver/ChangeLog
View file

@ -1,3 +1,16 @@
2005-05-12 Orjan Friberg <orjanf@axis.com>
* target.h (struct target_ops): Add insert_watchpoint,
remove_watchpoint, stopped_by_watchpoint, stopped_data_address function
pointers for hardware watchpoint support.
* linux-low.h (struct linux_target_ops): Ditto.
* linux-low.c (linux_insert_watchpoint, linux_remove_watchpoint)
(linux_stopped_by_watchpoint, linux_stopped_data_address): New. Add
to linux_target_ops.
* remote-utils.c (prepare_resume_reply): Add watchpoint information to
reply packet.
* server.c (main): Recognize 'Z' and 'z' packets.
2005-05-10 Ulrich Weigand <uweigand@de.ibm.com>
* linux-s390-low.c (s390_breakpoint, s390_breakpoint_len): Define.

46
gdb/gdbserver/linux-low.c
View file

@ -1467,7 +1467,47 @@ linux_read_auxv (CORE_ADDR offset, char *myaddr, unsigned int len)
return n;
}
/* These watchpoint related wrapper functions simply pass on the function call
if the target has registered a corresponding function. */
static int
linux_insert_watchpoint (char type, CORE_ADDR addr, int len)
{
if (the_low_target.insert_watchpoint != NULL)
return the_low_target.insert_watchpoint (type, addr, len);
else
/* Unsupported (see target.h). */
return 1;
}
static int
linux_remove_watchpoint (char type, CORE_ADDR addr, int len)
{
if (the_low_target.remove_watchpoint != NULL)
return the_low_target.remove_watchpoint (type, addr, len);
else
/* Unsupported (see target.h). */
return 1;
}
static int
linux_stopped_by_watchpoint (void)
{
if (the_low_target.stopped_by_watchpoint != NULL)
return the_low_target.stopped_by_watchpoint ();
else
return 0;
}
static CORE_ADDR
linux_stopped_data_address (void)
{
if (the_low_target.stopped_data_address != NULL)
return the_low_target.stopped_data_address ();
else
return 0;
}
static struct target_ops linux_target_ops = {
linux_create_inferior,
linux_attach,
@ -1483,6 +1523,10 @@ static struct target_ops linux_target_ops = {
linux_look_up_symbols,
linux_send_signal,
linux_read_auxv,
linux_insert_watchpoint,
linux_remove_watchpoint,
linux_stopped_by_watchpoint,
linux_stopped_data_address,
};
static void

7
gdb/gdbserver/linux-low.h
View file

@ -57,6 +57,13 @@ struct linux_target_ops
int decr_pc_after_break;
int (*breakpoint_at) (CORE_ADDR pc);
/* Watchpoint related functions. See target.h for comments. */
int (*insert_watchpoint) (char type, CORE_ADDR addr, int len);
int (*remove_watchpoint) (char type, CORE_ADDR addr, int len);
int (*stopped_by_watchpoint) (void);
CORE_ADDR (*stopped_data_address) (void);
};
extern struct linux_target_ops the_low_target;

22
gdb/gdbserver/remote-utils.c
View file

@ -639,6 +639,28 @@ prepare_resume_reply (char *buf, char status, unsigned char signo)
if (status == 'T')
{
const char **regp = gdbserver_expedite_regs;
if (the_target->stopped_by_watchpoint != NULL
&& (*the_target->stopped_by_watchpoint) ())
{
CORE_ADDR addr;
int i;
strncpy (buf, "watch:", 6);
buf += 6;
addr = (*the_target->stopped_data_address) ();
/* Convert each byte of the address into two hexadecimal chars.
Note that we take sizeof (void *) instead of sizeof (addr);
this is to avoid sending a 64-bit address to a 32-bit GDB. */
for (i = sizeof (void *) * 2; i > 0; i--)
{
*buf++ = tohex ((addr >> (i - 1) * 4) & 0xf);
}
*buf++ = ';';
}
while (*regp)
{
buf = outreg (find_regno (*regp), buf);

60
gdb/gdbserver/server.c
View file

@ -509,6 +509,66 @@ main (int argc, char *argv[])
signal = mywait (&status, 1);
prepare_resume_reply (own_buf, status, signal);
break;
case 'Z':
{
char *lenptr;
char *dataptr;
CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
int len = strtol (lenptr + 1, &dataptr, 16);
char type = own_buf[1];
if (the_target->insert_watchpoint == NULL
|| (type < '2' || type > '4'))
{
/* No watchpoint support or not a watchpoint command;
unrecognized either way. */
own_buf[0] = '\0';
}
else
{
int res;
res = (*the_target->insert_watchpoint) (type, addr, len);
if (res == 0)
write_ok (own_buf);
else if (res == 1)
/* Unsupported. */
own_buf[0] = '\0';
else
write_enn (own_buf);
}
break;
}
case 'z':
{
char *lenptr;
char *dataptr;
CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
int len = strtol (lenptr + 1, &dataptr, 16);
char type = own_buf[1];
if (the_target->remove_watchpoint == NULL
|| (type < '2' || type > '4'))
{
/* No watchpoint support or not a watchpoint command;
unrecognized either way. */
own_buf[0] = '\0';
}
else
{
int res;
res = (*the_target->remove_watchpoint) (type, addr, len);
if (res == 0)
write_ok (own_buf);
else if (res == 1)
/* Unsupported. */
own_buf[0] = '\0';
else
write_enn (own_buf);
}
break;
}
case 'k':
fprintf (stderr, "Killing inferior\n");
kill_inferior ();

21
gdb/gdbserver/target.h
View file

@ -133,6 +133,27 @@ struct target_ops
Read LEN bytes at OFFSET into a buffer at MYADDR. */
int (*read_auxv) (CORE_ADDR offset, char *myaddr, unsigned int len);
/* Insert and remove a hardware watchpoint.
Returns 0 on success, -1 on failure and 1 on unsupported.
The type is coded as follows:
2 = write watchpoint
3 = read watchpoint
4 = access watchpoint
*/
int (*insert_watchpoint) (char type, CORE_ADDR addr, int len);
int (*remove_watchpoint) (char type, CORE_ADDR addr, int len);
/* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise. */
int (*stopped_by_watchpoint) (void);
/* Returns the address associated with the watchpoint that hit, if any;
returns 0 otherwise. */
CORE_ADDR (*stopped_data_address) (void);
};
extern struct target_ops *the_target;