* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
+ * Copyright (C) 2007,2008 Øyvind Harboe *
+ * oyvind.harboe@zylin.com *
+ * *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
#define _DEBUG_GDB_IO_
#endif
+static int gdb_breakpoint_override;
+static enum breakpoint_type gdb_breakpoint_override_type;
+
extern int gdb_error(connection_t *connection, int retval);
static unsigned short gdb_port;
static const char *DIGITS = "0123456789abcdef";
* however sometimes '-' is sent even though we've already received
* an ACK (+) for everything we've sent off.
*/
-#ifndef _WIN32
int gotdata;
for (;;)
{
return retval;
LOG_WARNING("Discard unexpected char %c", reply);
}
-#endif
#endif
while (1)
gdb_write(connection, buffer, len);
gdb_write(connection, local_buffer+1, 3);
}
-
+
+ if (gdb_con->noack_mode)
+ break;
+
if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
return retval;
case '$':
break;
case '+':
+ /* gdb sends a dummy ack '+' at every remote connect - see remote_start_remote (remote.c)
+ * incase anyone tries to debug why they receive this warning every time */
LOG_WARNING("acknowledgment received, but no packet pending");
break;
case '-':
i++;
my_checksum += character & 0xff;
buffer[count++] = (character ^ 0x20) & 0xff;
- } else
+ }
+ else
{
my_checksum += character & 0xff;
buffer[count++] = character & 0xff;
my_checksum += character & 0xff;
buffer[count++] = character & 0xff;
}
-
}
*len = count;
if (my_checksum == strtoul(checksum, NULL, 16))
{
+ if (gdb_con->noack_mode)
+ break;
gdb_write(connection, "+", 1);
break;
}
- LOG_WARNING("checksum error, requesting retransmission");
- gdb_write(connection, "-", 1);
+ if (!gdb_con->noack_mode)
+ {
+ LOG_WARNING("checksum error, requesting retransmission");
+ gdb_write(connection, "-", 1);
+ }
+ else
+ {
+ LOG_WARNING("checksum error, no-ack-mode");
+ break;
+ }
}
if (gdb_con->closed)
return ERROR_SERVER_REMOTE_CLOSED;
return ERROR_OK;
}
+static void gdb_frontend_halted(struct target_s *target, connection_t *connection)
+{
+ gdb_connection_t *gdb_connection = connection->priv;
+
+ /* In the GDB protocol when we are stepping or coninuing execution,
+ * we have a lingering reply. Upon receiving a halted event
+ * when we have that lingering packet, we reply to the original
+ * step or continue packet.
+ *
+ * Executing monitor commands can bring the target in and
+ * out of the running state so we'll see lots of TARGET_EVENT_XXX
+ * that are to be ignored.
+ */
+ if (gdb_connection->frontend_state == TARGET_RUNNING)
+ {
+ char sig_reply[4];
+ int signal;
+ /* stop forwarding log packets! */
+ log_remove_callback(gdb_log_callback, connection);
+
+ if (gdb_connection->ctrl_c)
+ {
+ signal = 0x2;
+ gdb_connection->ctrl_c = 0;
+ }
+ else
+ {
+ signal = gdb_last_signal(target);
+ }
+
+ snprintf(sig_reply, 4, "T%2.2x", signal);
+ gdb_put_packet(connection, sig_reply, 3);
+ gdb_connection->frontend_state = TARGET_HALTED;
+ }
+}
+
int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv)
{
connection_t *connection = priv;
- gdb_connection_t *gdb_connection = connection->priv;
- char sig_reply[4];
- int signal;
switch (event)
{
case TARGET_EVENT_HALTED:
- /* In the GDB protocol when we are stepping or coninuing execution,
- * we have a lingering reply. Upon receiving a halted event
- * when we have that lingering packet, we reply to the original
- * step or continue packet.
- *
- * Executing monitor commands can bring the target in and
- * out of the running state so we'll see lots of TARGET_EVENT_XXX
- * that are to be ignored.
- */
- if (gdb_connection->frontend_state == TARGET_RUNNING)
- {
- /* stop forwarding log packets! */
- log_remove_callback(gdb_log_callback, connection);
-
- if (gdb_connection->ctrl_c)
- {
- signal = 0x2;
- gdb_connection->ctrl_c = 0;
- }
- else
- {
- signal = gdb_last_signal(target);
- }
-
- snprintf(sig_reply, 4, "T%2.2x", signal);
- gdb_put_packet(connection, sig_reply, 3);
- gdb_connection->frontend_state = TARGET_HALTED;
- }
+ gdb_frontend_halted(target, connection);
break;
- case TARGET_EVENT_GDB_PROGRAM:
+ case TARGET_EVENT_GDB_FLASH_ERASE_START:
gdb_program_handler(target, event, connection->cmd_ctx);
break;
default:
gdb_connection->vflash_image = NULL;
gdb_connection->closed = 0;
gdb_connection->busy = 0;
+ gdb_connection->noack_mode = 0;
/* send ACK to GDB for debug request */
gdb_write(connection, "+", 1);
/* output goes through gdb connection */
command_set_output_handler(connection->cmd_ctx, gdb_output, connection);
+ /* we must remove all breakpoints registered to the target as a previous
+ * GDB session could leave dangling breakpoints if e.g. communication
+ * timed out.
+ */
+ breakpoint_clear_target(gdb_service->target);
+ watchpoint_clear_target(gdb_service->target);
+
/* register callback to be informed about target events */
target_register_event_callback(gdb_target_callback_event_handler, connection);
* connect.
*/
target_halt(gdb_service->target);
+ /* FIX!!!! could extended-remote work better here?
+ *
+ * wait a tiny bit for halted state or we just continue. The
+ * GDB register packet will then contain garbage
+ */
+ target_wait_state(gdb_service->target, TARGET_HALTED, 500);
/* remove the initial ACK from the incoming buffer */
if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK)
return ERROR_OK;
}
-void gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
+int gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
int current = 0;
u32 address = 0x0;
+ int retval=ERROR_OK;
LOG_DEBUG("-");
{
LOG_DEBUG("continue");
target_invoke_script(connection->cmd_ctx, target, "pre_resume");
- target_resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */
+ retval=target_resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */
}
else if (packet[0] == 's')
{
LOG_DEBUG("step");
- target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */
+ retval=target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */
}
+ return retval;
}
int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
wp_type = WPT_READ;
else if (type == 4) /* access watchpoint */
wp_type = WPT_ACCESS;
+
+ if (gdb_breakpoint_override&&((bp_type==BKPT_SOFT)||(bp_type==BKPT_HARD)))
+ {
+ bp_type=gdb_breakpoint_override_type;
+ }
if (*separator != ',')
{
int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
command_context_t *cmd_ctx = connection->cmd_ctx;
-
+ gdb_connection_t *gdb_connection = connection->priv;
+
if (strstr(packet, "qRcmd,"))
{
if (packet_size > 6)
int size = 0;
xml_printf(&retval, &buffer, &pos, &size,
- "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-",
+ "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-;QStartNoAckMode+",
(GDB_BUFFER_SIZE - 1), ((gdb_use_memory_map == 1)&&(flash_get_bank_count()>0)) ? '+' : '-');
if (retval != ERROR_OK)
free(xml);
return ERROR_OK;
}
+ else if (strstr(packet, "QStartNoAckMode"))
+ {
+ gdb_connection->noack_mode = 1;
+ gdb_put_packet(connection, "OK", 2);
+ return ERROR_OK;
+ }
gdb_put_packet(connection, "", 0);
return ERROR_OK;
flash_set_dirty();
/* perform any target specific operations before the erase */
- target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_PROGRAM);
+ target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_START);
/* perform erase */
if ((result = flash_erase_address_range(gdb_service->target, addr, length)) != ERROR_OK)
/* Do not allocate this on the stack */
char gdb_packet_buffer[GDB_BUFFER_SIZE];
+static void gdb_sig_halted(connection_t *connection)
+{
+ char sig_reply[4];
+ snprintf(sig_reply, 4, "T%2.2x", 2);
+ gdb_put_packet(connection, sig_reply, 3);
+
+}
+
int gdb_input_inner(connection_t *connection)
{
gdb_service_t *gdb_service = connection->service->priv;
gdb_put_packet(connection, NULL, 0);
break;
case 'q':
+ case 'Q':
retval = gdb_query_packet(connection, target, packet, packet_size);
break;
case 'g':
/* If the target isn't in the halted state, then we can't
* step/continue. This might be early setup, etc.
*/
- char sig_reply[4];
- snprintf(sig_reply, 4, "T%2.2x", 2);
- gdb_put_packet(connection, sig_reply, 3);
+ gdb_sig_halted(connection);
} else
{
/* We're running/stepping, in which case we can
gdb_connection_t *gdb_con = connection->priv;
gdb_con->frontend_state = TARGET_RUNNING;
log_add_callback(gdb_log_callback, connection);
- gdb_step_continue_packet(connection, target, packet, packet_size);
+ int retval=gdb_step_continue_packet(connection, target, packet, packet_size);
+ if (retval!=ERROR_OK)
+ {
+ /* we'll never receive a halted condition... issue a false one.. */
+ gdb_frontend_halted(target, connection);
+ }
}
}
break;
break;
case 'R':
/* handle extended restart packet */
+ breakpoint_clear_target(gdb_service->target);
+ watchpoint_clear_target(gdb_service->target);
command_run_linef(connection->cmd_ctx, "ocd_gdb_restart %d", get_num_by_target(target));
break;
default:
return ERROR_OK;
}
-int gdb_init()
+int gdb_init(void)
{
gdb_service_t *gdb_service;
- target_t *target = targets;
- int i = 0;
+ target_t *target = all_targets;
if (!target)
{
{
char service_name[8];
- snprintf(service_name, 8, "gdb-%2.2i", i);
+ snprintf(service_name, 8, "gdb-%2.2i", target->target_number);
gdb_service = malloc(sizeof(gdb_service_t));
gdb_service->target = target;
- add_service("gdb", CONNECTION_GDB, gdb_port + i, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
+ add_service("gdb", CONNECTION_GDB,
+ gdb_port + target->target_number,
+ 1, gdb_new_connection, gdb_input,
+ gdb_connection_closed,
+ gdb_service);
- LOG_DEBUG("gdb service for target %s at port %i", target->type->name, gdb_port + i);
+ LOG_DEBUG("gdb service for target %s at port %i",
+ target->type->name,
+ gdb_port + target->target_number);
- i++;
target = target->next;
}
return ERROR_OK;
}
+/* daemon configuration command gdb_port */
+int handle_gdb_breakpoint_override_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ if (argc == 0)
+ {
+
+ } else if (argc==1)
+ {
+ gdb_breakpoint_override = 1;
+ if (strcmp(args[0], "hard")==0)
+ {
+ gdb_breakpoint_override_type=BKPT_HARD;
+ } else if (strcmp(args[0], "soft")==0)
+ {
+ gdb_breakpoint_override_type=BKPT_SOFT;
+ } else if (strcmp(args[0], "disable") == 0)
+ {
+ gdb_breakpoint_override = 0;
+ }
+ } else
+ {
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ }
+ if (gdb_breakpoint_override)
+ {
+ LOG_USER("force %s breakpoints", (gdb_breakpoint_override_type==BKPT_HARD)?"hard":"soft");
+ } else
+ {
+ LOG_USER("breakpoint type is not overriden");
+ }
+
+ return ERROR_OK;
+}
+
+
int gdb_register_commands(command_context_t *command_context)
{
register_command(command_context, NULL, "gdb_port", handle_gdb_port_command,
COMMAND_CONFIG, "");
register_command(command_context, NULL, "gdb_report_data_abort", handle_gdb_report_data_abort_command,
COMMAND_CONFIG, "");
+ register_command(command_context, NULL, "gdb_breakpoint_override", handle_gdb_breakpoint_override_command,
+ COMMAND_EXEC, "hard/soft/disabled - force breakpoint type for gdb 'break' commands."
+ "The raison d'etre for this option is to support GDB GUI's without "
+ "a hard/soft breakpoint concept where the default OpenOCD behaviour "
+ "is not sufficient");
return ERROR_OK;
}
Code Review / openocd.git / blobdiff