* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
+#ifdef HAVE_CONFIG_H
#include "config.h"
+#endif
+
+#include "replacements.h"
#include "gdb_server.h"
#include "log.h"
#include "binarybuffer.h"
#include "breakpoints.h"
+#include "flash.h"
+#include "target_request.h"
#define __USE_GNU
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
-#ifndef HAVE_STRNDUP
-#include <stdio.h>
-char* strndup(const char *s, size_t n)
-{
- size_t len = strnlen (s, n);
- char *new = (char *) malloc (len + 1);
-
- if (new == NULL)
- return NULL;
-
- new[len] = '\0';
- return (char *) memcpy (new, s, len);
-}
-#endif
-
#if 0
#define _DEBUG_GDB_IO_
#endif
{
gdb_connection_t *gdb_con = connection->priv;
char *debug_buffer;
-
+
if (gdb_con->buf_cnt-- > 0)
{
*next_char = *(gdb_con->buf_p++);
connection->input_pending = 1;
else
connection->input_pending = 0;
-
+
#ifdef _DEBUG_GDB_IO_
DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
#endif
-
+
return ERROR_OK;
}
- while ((gdb_con->buf_cnt = read(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE)) <= 0)
+ while ((gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE)) <= 0)
{
if (gdb_con->buf_cnt == 0)
return ERROR_SERVER_REMOTE_CLOSED;
-
+
+#ifdef _WIN32
+ errno = WSAGetLastError();
+
+ switch(errno)
+ {
+ case WSAEWOULDBLOCK:
+ usleep(1000);
+ break;
+ case WSAECONNABORTED:
+ return ERROR_SERVER_REMOTE_CLOSED;
+ default:
+ ERROR("read: %d", errno);
+ exit(-1);
+ }
+#else
switch(errno)
{
case EAGAIN:
ERROR("read: %s", strerror(errno));
exit(-1);
}
+#endif
}
-
+
debug_buffer = malloc(gdb_con->buf_cnt + 1);
memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt);
debug_buffer[gdb_con->buf_cnt] = 0;
else
connection->input_pending = 0;
#ifdef _DEBUG_GDB_IO_
- DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
+ DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
#endif
-
+
+ return ERROR_OK;
+}
+
+int gdb_putback_char(connection_t *connection, int last_char)
+{
+ gdb_connection_t *gdb_con = connection->priv;
+
+ if (gdb_con->buf_p > gdb_con->buffer)
+ {
+ *(--gdb_con->buf_p) = last_char;
+ gdb_con->buf_cnt++;
+ }
+ else
+ {
+ ERROR("BUG: couldn't put character back");
+ }
+
return ERROR_OK;
}
for (i = 0; i < len; i++)
my_checksum += buffer[i];
-
+
while (1)
{
-
+
debug_buffer = malloc(len + 1);
memcpy(debug_buffer, buffer, len);
debug_buffer[len] = 0;
DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
free(debug_buffer);
-
- write(connection->fd, "$", 1);
+
+ write_socket(connection->fd, "$", 1);
if (len > 0)
- write(connection->fd, buffer, len);
- write(connection->fd, "#", 1);
-
+ write_socket(connection->fd, buffer, len);
+ write_socket(connection->fd, "#", 1);
+
snprintf(checksum, 3, "%2.2x", my_checksum);
-
- write(connection->fd, checksum, 2);
+
+ write_socket(connection->fd, checksum, 2);
if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
return retval;
return ERROR_SERVER_REMOTE_CLOSED;
}
}
-
+
return ERROR_OK;
}
int character;
int count = 0;
int retval;
- int first_char = 0;
- int packet_type;
char checksum[3];
unsigned char my_checksum = 0;
gdb_connection_t *gdb_con = connection->priv;
if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
return retval;
+ DEBUG("character: '%c'", character);
+
switch (character)
{
case '$':
} while (character != '$');
my_checksum = 0;
-
+
do
{
if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
return retval;
-
- if( !first_char ) {
- packet_type = character;
- first_char = 1;
- }
-
- if( packet_type == 'X' )
+
+ if (character == '#') break;
+
+ if (character == '}')
{
- switch (character)
- {
- case '#':
- break;
- case 0x7d:
- /* data transmitted in binary mode (X packet)
- * uses 0x7d as escape character */
- my_checksum += character & 0xff;
- gdb_get_char(connection, &character);
- my_checksum += character & 0xff;
- buffer[count++] = (character ^ 0x20) & 0xff;
- if (count > *len)
- {
- ERROR("packet buffer too small");
- return ERROR_GDB_BUFFER_TOO_SMALL;
- }
- break;
- default:
- buffer[count++] = character & 0xff;
- my_checksum += character & 0xff;
- if (count > *len)
- {
- ERROR("packet buffer too small");
- return ERROR_GDB_BUFFER_TOO_SMALL;
- }
- break;
- }
+ /* data transmitted in binary mode (X packet)
+ * uses 0x7d as escape character */
+ my_checksum += character & 0xff;
+ if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
+ return retval;
+ my_checksum += character & 0xff;
+ buffer[count++] = (character ^ 0x20) & 0xff;
}
else
{
- switch (character)
- {
- case '#':
- break;
- case 0x3:
- gdb_con->ctrl_c = 1;
- break;
- default:
- buffer[count++] = character & 0xff;
- my_checksum += character & 0xff;
- if (count > *len)
- {
- ERROR("packet buffer too small");
- return ERROR_GDB_BUFFER_TOO_SMALL;
- }
- break;
- }
+ my_checksum += character & 0xff;
+ buffer[count++] = character & 0xff;
+ }
+
+ if (count > *len)
+ {
+ ERROR("packet buffer too small");
+ return ERROR_GDB_BUFFER_TOO_SMALL;
}
- } while (character != '#');
+ } while (1);
*len = count;
-
+
if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
return retval;
checksum[0] = character;
return retval;
checksum[1] = character;
checksum[2] = 0;
-
+
if (my_checksum == strtoul(checksum, NULL, 16))
{
- write (connection->fd, "+", 1);
+ write_socket(connection->fd, "+", 1);
break;
}
WARNING("checksum error, requesting retransmission");
- write(connection->fd, "-", 1);
+ write_socket(connection->fd, "-", 1);
}
return ERROR_OK;
int i, bin_size;
bin_size = strlen(line);
-
+
hex_buffer = malloc(bin_size*2 + 4);
hex_buffer[0] = 'O';
gdb_connection_t *gdb_connection = connection->priv;
char sig_reply[4];
int signal;
-
+
switch (event)
{
case TARGET_EVENT_HALTED:
{
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_service_t *gdb_service = connection->service->priv;
int retval;
int initial_ack;
-
+
connection->priv = gdb_connection;
-
+
/* initialize gdb connection information */
gdb_connection->buf_p = gdb_connection->buffer;
gdb_connection->buf_cnt = 0;
gdb_connection->ctrl_c = 0;
gdb_connection->frontend_state = TARGET_HALTED;
-
+ gdb_connection->vflash_image = NULL;
+
/* output goes through gdb connection */
command_set_output_handler(connection->cmd_ctx, gdb_output, connection);
-
+
/* register callback to be informed about target events */
target_register_event_callback(gdb_target_callback_event_handler, connection);
-
+
/* a gdb session just attached, put the target in halt mode */
if (((retval = gdb_service->target->type->halt(gdb_service->target)) != ERROR_OK) &&
- (retval != ERROR_TARGET_ALREADY_HALTED))
+ (retval != ERROR_TARGET_ALREADY_HALTED))
{
ERROR("error when trying to halt target");
exit(-1);
}
-
+
while (gdb_service->target->state != TARGET_HALTED)
{
gdb_service->target->type->poll(gdb_service->target);
}
-
+
/* remove the initial ACK from the incoming buffer */
if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK)
return retval;
-
+
+ if (initial_ack != '+')
+ gdb_putback_char(connection, initial_ack);
+
return ERROR_OK;
}
int gdb_connection_closed(connection_t *connection)
{
+ gdb_service_t *gdb_service = connection->service->priv;
+ gdb_connection_t *gdb_connection = connection->priv;
+
+ /* see if an image built with vFlash commands is left */
+ if (gdb_connection->vflash_image)
+ {
+ image_close(gdb_connection->vflash_image);
+ free(gdb_connection->vflash_image);
+ gdb_connection->vflash_image = NULL;
+ }
+
+ /* if this connection registered a debug-message receiver delete it */
+ delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target);
+
if (connection->priv)
free(connection->priv);
else
ERROR("BUG: connection->priv == NULL");
-
+
target_unregister_event_callback(gdb_target_callback_event_handler, connection);
return ERROR_OK;
}
+void gdb_send_error(connection_t *connection, u8 the_error)
+{
+ char err[4];
+ snprintf(err, 4, "E%2.2X", the_error );
+ gdb_put_packet(connection, err, 3);
+}
+
int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
{
char sig_reply[4];
int signal;
-
+
signal = gdb_last_signal(target);
snprintf(sig_reply, 4, "S%2.2x", signal);
gdb_put_packet(connection, sig_reply, 3);
-
+
return ERROR_OK;
}
-void gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
+void gdb_str_to_target(target_t *target, char *str, char *tstr)
+{
+ int str_len = strlen(str);
+ int i;
+
+ if (str_len % 2)
+ {
+ ERROR("BUG: gdb value with uneven number of characters encountered: %s", str);
+ exit(-1);
+ }
+
+ if (target->endianness == TARGET_LITTLE_ENDIAN)
+ {
+ for (i = 0; i < str_len; i+=2)
+ {
+ tstr[str_len - i - 1] = str[i + 1];
+ tstr[str_len - i - 2] = str[i];
+ }
+ }
+ else
+ {
+ for (i = 0; i < str_len; i++)
+ {
+ tstr[i] = str[i];
+ }
+ }
+}
+
+void gdb_target_to_str(target_t *target, char *tstr, char *str)
+{
+ int str_len = strlen(tstr);
+ int i;
+
+ if (str_len % 2)
+ {
+ ERROR("BUG: gdb value with uneven number of characters encountered");
+ exit(-1);
+ }
+
+ if (target->endianness == TARGET_LITTLE_ENDIAN)
+ {
+ for (i = 0; i < str_len; i+=2)
+ {
+ str[str_len - i - 1] = tstr[i + 1];
+ str[str_len - i - 2] = tstr[i];
+ }
+ }
+ else
+ {
+ for (i = 0; i < str_len; i++)
+ {
+ str[i] = tstr[i];
+ }
+ }
+}
+
+int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
{
reg_t **reg_list;
int reg_list_size;
char *reg_packet;
char *reg_packet_p;
int i;
-
- DEBUG("");
+
+ DEBUG("-");
if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
{
switch (retval)
{
case ERROR_TARGET_NOT_HALTED:
- ERROR("gdb requested registers, but we're not halted");
- exit(-1);
+ ERROR("gdb requested registers but we're not halted, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
default:
+ /* this is a bug condition - get_gdb_reg_list() may not return any other error */
ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
exit(-1);
}
{
reg_packet_size += reg_list[i]->size;
}
-
+
reg_packet = malloc(CEIL(reg_packet_size, 8) * 2);
reg_packet_p = reg_packet;
-
+
for (i = 0; i < reg_list_size; i++)
{
- int j;
- char *hex_buf = buf_to_char(reg_list[i]->value, reg_list[i]->size);
+ char *hex_buf = buf_to_str(reg_list[i]->value, reg_list[i]->size, 16);
DEBUG("hex_buf: %s", hex_buf);
- for (j = CEIL(reg_list[i]->size, 8) * 2; j > 0; j -= 2)
- {
- *reg_packet_p++ = hex_buf[j - 2];
- *reg_packet_p++ = hex_buf[j - 1];
- }
+ gdb_str_to_target(target, hex_buf, reg_packet_p);
+ reg_packet_p += CEIL(reg_list[i]->size, 8) * 2;
free(hex_buf);
}
reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2);
DEBUG("reg_packet: %s", reg_packet_p);
free(reg_packet_p);
-
+
gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2);
free(reg_packet);
-
+
+ free(reg_list);
+
+ return ERROR_OK;
}
-void gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
+int gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
int i;
reg_t **reg_list;
int reg_list_size;
int retval;
char *packet_p;
-
- DEBUG("");
+
+ DEBUG("-");
/* skip command character */
packet++;
if (packet_size % 2)
{
- WARNING("GDB set_registers packet with uneven characters received");
- return;
+ WARNING("GDB set_registers packet with uneven characters received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
}
if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
switch (retval)
{
case ERROR_TARGET_NOT_HALTED:
- ERROR("gdb requested registers, but we're not halted");
- exit(-1);
+ ERROR("gdb tried to registers but we're not halted, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
default:
+ /* this is a bug condition - get_gdb_reg_list() may not return any other error */
ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
exit(-1);
}
packet_p = packet;
for (i = 0; i < reg_list_size; i++)
{
- char_to_buf(packet, CEIL(reg_list[i]->size, 8) * 2, reg_list[i]->value, reg_list[i]->size);
- reg_list[i]->dirty = 1;
+ u8 *bin_buf;
+ char *hex_buf;
+ reg_arch_type_t *arch_type;
+
+ /* convert from GDB-string (target-endian) to hex-string (big-endian) */
+ hex_buf = malloc(CEIL(reg_list[i]->size, 8) * 2);
+ gdb_target_to_str(target, packet_p, hex_buf);
+
+ /* convert hex-string to binary buffer */
+ bin_buf = malloc(CEIL(reg_list[i]->size, 8));
+ str_to_buf(hex_buf, CEIL(reg_list[i]->size, 8) * 2, bin_buf, reg_list[i]->size, 16);
+
+ /* get register arch_type, and call set method */
+ arch_type = register_get_arch_type(reg_list[i]->arch_type);
+ if (arch_type == NULL)
+ {
+ ERROR("BUG: encountered unregistered arch type");
+ exit(-1);
+ }
+ arch_type->set(reg_list[i], bin_buf);
+
+ /* advance packet pointer */
+ packet_p += (CEIL(reg_list[i]->size, 8) * 2);
+
+ free(bin_buf);
+ free(hex_buf);
}
+ /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */
+ free(reg_list);
+
gdb_put_packet(connection, "OK", 2);
+
+ return ERROR_OK;
}
-void gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
+int gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
- char *hex_buf;
char *reg_packet;
- char *reg_packet_p;
int reg_num = strtoul(packet + 1, NULL, 16);
reg_t **reg_list;
int reg_list_size;
int retval;
- int i;
-
- DEBUG("");
-
+ char *hex_buf;
+
+ DEBUG("-");
+
if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
{
switch (retval)
{
case ERROR_TARGET_NOT_HALTED:
- ERROR("gdb requested registers, but we're not halted");
- exit(-1);
+ ERROR("gdb requested registers but we're not halted, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
default:
+ /* this is a bug condition - get_gdb_reg_list() may not return any other error */
ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
exit(-1);
}
}
-
+
if (reg_list_size <= reg_num)
{
ERROR("gdb requested a non-existing register");
exit(-1);
}
- hex_buf = buf_to_char(reg_list[reg_num]->value, reg_list[reg_num]->size);
- reg_packet = reg_packet_p = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
-
- for (i = CEIL(reg_list[reg_num]->size, 8) * 2; i > 0; i -= 2)
- {
- *reg_packet_p++ = hex_buf[i - 2];
- *reg_packet_p++ = hex_buf[i - 1];
- }
-
+ reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
+
+ hex_buf = buf_to_str(reg_list[reg_num]->value, reg_list[reg_num]->size, 16);
+
+ gdb_str_to_target(target, hex_buf, reg_packet);
+
gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2);
-
+
+ free(reg_list);
free(reg_packet);
free(hex_buf);
-
+
+ return ERROR_OK;
}
-void gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
+int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
char *separator;
+ char *hex_buf;
+ u8 *bin_buf;
int reg_num = strtoul(packet + 1, &separator, 16);
reg_t **reg_list;
int reg_list_size;
int retval;
+ reg_arch_type_t *arch_type;
+
+ DEBUG("-");
- DEBUG("");
-
if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
{
switch (retval)
{
case ERROR_TARGET_NOT_HALTED:
- ERROR("gdb requested registers, but we're not halted");
- exit(-1);
+ ERROR("gdb tried to set a register but we're not halted, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
default:
+ /* this is a bug condition - get_gdb_reg_list() may not return any other error */
ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
exit(-1);
}
}
-
+
if (reg_list_size < reg_num)
{
ERROR("gdb requested a non-existing register");
- exit(-1);
+ return ERROR_SERVER_REMOTE_CLOSED;
}
if (*separator != '=')
{
- ERROR("GDB set register packet, but no '=' following the register number");
+ ERROR("GDB 'set register packet', but no '=' following the register number");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
+
+ /* convert from GDB-string (target-endian) to hex-string (big-endian) */
+ hex_buf = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
+ gdb_target_to_str(target, separator + 1, hex_buf);
+
+ /* convert hex-string to binary buffer */
+ bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8));
+ str_to_buf(hex_buf, CEIL(reg_list[reg_num]->size, 8) * 2, bin_buf, reg_list[reg_num]->size, 16);
+
+ /* get register arch_type, and call set method */
+ arch_type = register_get_arch_type(reg_list[reg_num]->arch_type);
+ if (arch_type == NULL)
+ {
+ ERROR("BUG: encountered unregistered arch type");
exit(-1);
}
-
- char_to_buf(separator + 1, CEIL(reg_list[reg_num]->size, 8) * 2, reg_list[reg_num]->value, reg_list[reg_num]->size);
- reg_list[reg_num]->dirty = 1;
+ arch_type->set(reg_list[reg_num], bin_buf);
gdb_put_packet(connection, "OK", 2);
+ free(bin_buf);
+ free(hex_buf);
+ free(reg_list);
+
+ return ERROR_OK;
+}
+
+int gdb_memory_packet_error(connection_t *connection, int retval)
+{
+ switch (retval)
+ {
+ case ERROR_TARGET_NOT_HALTED:
+ ERROR("gdb tried to read memory but we're not halted, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ break;
+ case ERROR_TARGET_DATA_ABORT:
+ gdb_send_error(connection, EIO);
+ break;
+ case ERROR_TARGET_TRANSLATION_FAULT:
+ gdb_send_error(connection, EFAULT);
+ break;
+ case ERROR_TARGET_UNALIGNED_ACCESS:
+ gdb_send_error(connection, EFAULT);
+ break;
+ default:
+ ERROR("BUG: unexpected error %i", retval);
+ exit(-1);
+ }
+
+ return ERROR_OK;
}
-void gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
+int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
char *separator;
u32 addr = 0;
char *hex_buffer;
int i;
+ int retval;
/* skip command character */
packet++;
addr = strtoul(packet, &separator, 16);
-
+
if (*separator != ',')
- return;
+ {
+ ERROR("incomplete read memory packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
len = strtoul(separator+1, NULL, 16);
{
case 4:
if ((addr % 4) == 0)
- target->type->read_memory(target, addr, 4, 1, buffer);
+ retval = target->type->read_memory(target, addr, 4, 1, buffer);
else
- target->type->read_memory(target, addr, 1, len, buffer);
+ retval = target->type->read_memory(target, addr, 1, len, buffer);
break;
case 2:
if ((addr % 2) == 0)
- target->type->read_memory(target, addr, 2, 1, buffer);
+ retval = target->type->read_memory(target, addr, 2, 1, buffer);
else
- target->type->read_memory(target, addr, 1, len, buffer);
+ retval = target->type->read_memory(target, addr, 1, len, buffer);
break;
default:
if (((addr % 4) == 0) && ((len % 4) == 0))
- target->type->read_memory(target, addr, 4, len / 4, buffer);
+ retval = target->type->read_memory(target, addr, 4, len / 4, buffer);
else
- target->type->read_memory(target, addr, 1, len, buffer);
+ retval = target->type->read_memory(target, addr, 1, len, buffer);
}
- hex_buffer = malloc(len * 2 + 1);
-
- for (i=0; i<len; i++)
- snprintf(hex_buffer + 2*i, 3, "%2.2x", buffer[i]);
+ if (retval == ERROR_OK)
+ {
+ hex_buffer = malloc(len * 2 + 1);
+
+ for (i=0; i<len; i++)
+ snprintf(hex_buffer + 2*i, 3, "%2.2x", buffer[i]);
+
+ gdb_put_packet(connection, hex_buffer, len * 2);
+
+ free(hex_buffer);
+ }
+ else
+ {
+ if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
+ return retval;
+ }
- gdb_put_packet(connection, hex_buffer, len * 2);
-
- free(hex_buffer);
free(buffer);
+
+ return ERROR_OK;
}
-void gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
+int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
char *separator;
u32 addr = 0;
u8 *buffer;
int i;
+ int retval;
/* skip command character */
packet++;
addr = strtoul(packet, &separator, 16);
-
+
if (*separator != ',')
- return;
+ {
+ ERROR("incomplete write memory packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
len = strtoul(separator+1, &separator, 16);
if (*(separator++) != ':')
- return;
+ {
+ ERROR("incomplete write memory packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
buffer = malloc(len);
buffer[i] = tmp;
}
+ retval = ERROR_OK;
switch (len)
{
/* handle sized writes */
case 4:
if ((addr % 4) == 0)
- target->type->write_memory(target, addr, 4, 1, buffer);
+ retval = target->type->write_memory(target, addr, 4, 1, buffer);
else
- target->type->write_memory(target, addr, 1, len, buffer);
+ retval = target->type->write_memory(target, addr, 1, len, buffer);
break;
case 2:
if ((addr % 2) == 0)
- target->type->write_memory(target, addr, 2, 1, buffer);
+ retval = target->type->write_memory(target, addr, 2, 1, buffer);
else
- target->type->write_memory(target, addr, 1, len, buffer);
+ retval = target->type->write_memory(target, addr, 1, len, buffer);
break;
case 3:
case 1:
- target->type->write_memory(target, addr, 1, len, buffer);
+ retval = target->type->write_memory(target, addr, 1, len, buffer);
break;
- /* handle bulk writes */
+ /* handle bulk writes */
default:
- target_write_buffer(target, addr, len, buffer);
+ retval = target_write_buffer(target, addr, len, buffer);
break;
}
- gdb_put_packet(connection, "OK", 2);
-
+ if (retval == ERROR_OK)
+ {
+ gdb_put_packet(connection, "OK", 2);
+ }
+ else
+ {
+ if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
+ return retval;
+ }
+
free(buffer);
+
+ return ERROR_OK;
}
-void gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
+int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
char *separator;
u32 addr = 0;
u32 len = 0;
u8 *buffer;
+ int retval;
/* skip command character */
packet++;
addr = strtoul(packet, &separator, 16);
-
+
if (*separator != ',')
- return;
+ {
+ ERROR("incomplete write memory binary packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
len = strtoul(separator+1, &separator, 16);
if (*(separator++) != ':')
- return;
+ {
+ ERROR("incomplete write memory binary packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
+ retval = ERROR_OK;
if( len ) {
-
+
buffer = malloc(len);
-
+
DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
-
+
memcpy( buffer, separator, len );
-
+
switch (len)
{
case 4:
if ((addr % 4) == 0)
- target->type->write_memory(target, addr, 4, 1, buffer);
+ retval = target->type->write_memory(target, addr, 4, 1, buffer);
else
- target->type->write_memory(target, addr, 1, len, buffer);
+ retval = target->type->write_memory(target, addr, 1, len, buffer);
break;
case 2:
if ((addr % 2) == 0)
- target->type->write_memory(target, addr, 2, 1, buffer);
+ retval = target->type->write_memory(target, addr, 2, 1, buffer);
else
- target->type->write_memory(target, addr, 1, len, buffer);
+ retval = target->type->write_memory(target, addr, 1, len, buffer);
break;
case 3:
case 1:
- target->type->write_memory(target, addr, 1, len, buffer);
+ retval = target->type->write_memory(target, addr, 1, len, buffer);
break;
default:
- target_write_buffer(target, addr, len, buffer);
+ retval = target_write_buffer(target, addr, len, buffer);
break;
}
-
+
free(buffer);
}
- gdb_put_packet(connection, "OK", 2);
+ if (retval == ERROR_OK)
+ {
+ gdb_put_packet(connection, "OK", 2);
+ }
+ else
+ {
+ if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
+ return retval;
+ }
+
+ return ERROR_OK;
}
void gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
int current = 0;
u32 address = 0x0;
- DEBUG("");
+ DEBUG("-");
if (packet_size > 1)
{
- u32 address = 0;
packet[packet_size] = 0;
address = strtoul(packet + 1, NULL, 16);
}
}
}
-void gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
+int gdb_bp_wp_packet_error(connection_t *connection, int retval)
+{
+ switch (retval)
+ {
+ case ERROR_TARGET_NOT_HALTED:
+ ERROR("gdb tried to set a breakpoint but we're not halted, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ break;
+ case ERROR_TARGET_RESOURCE_NOT_AVAILABLE:
+ gdb_send_error(connection, EBUSY);
+ break;
+ default:
+ ERROR("BUG: unexpected error %i", retval);
+ exit(-1);
+ }
+
+ return ERROR_OK;
+}
+
+int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
int type;
- enum breakpoint_type bp_type;
+ enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;
enum watchpoint_rw wp_type;
u32 address;
u32 size;
char *separator;
int retval;
- DEBUG("");
+ DEBUG("-");
type = strtoul(packet + 1, &separator, 16);
-
+
if (type == 0) /* memory breakpoint */
bp_type = BKPT_SOFT;
else if (type == 1) /* hardware breakpoint */
wp_type = WPT_READ;
else if (type == 4) /* access watchpoint */
wp_type = WPT_ACCESS;
-
+
if (*separator != ',')
- return;
+ {
+ ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
address = strtoul(separator+1, &separator, 16);
if (*separator != ',')
- return;
+ {
+ ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
size = strtoul(separator+1, &separator, 16);
{
if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)
{
- if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
- {
- gdb_put_packet(connection, "E00", 3);
- break;
- }
+ if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)
+ return retval;
+ }
+ else
+ {
+ gdb_put_packet(connection, "OK", 2);
}
}
else
{
breakpoint_remove(target, address);
+ gdb_put_packet(connection, "OK", 2);
}
- gdb_put_packet(connection, "OK", 2);
break;
case 2:
case 3:
case 4:
{
if (packet[0] == 'Z')
- watchpoint_add(target, address, size, type-2, 0, 0xffffffffu);
+ {
+ if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK)
+ {
+ if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)
+ return retval;
+ }
+ else
+ {
+ gdb_put_packet(connection, "OK", 2);
+ }
+ }
else
+ {
watchpoint_remove(target, address);
- gdb_put_packet(connection, "OK", 2);
+ gdb_put_packet(connection, "OK", 2);
+ }
break;
}
default:
break;
}
+ return ERROR_OK;
}
void gdb_query_packet(connection_t *connection, char *packet, int packet_size)
{
command_context_t *cmd_ctx = connection->cmd_ctx;
- gdb_service_t *gdb_service = connection->service->priv;
- target_t *target = gdb_service->target;
if (strstr(packet, "qRcmd,"))
{
gdb_put_packet(connection, "OK", 2);
return;
}
-
+
gdb_put_packet(connection, "", 0);
}
+int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
+{
+ gdb_connection_t *gdb_connection = connection->priv;
+ gdb_service_t *gdb_service = connection->service->priv;
+ int result;
+
+ if (strstr(packet, "vFlashErase:"))
+ {
+ unsigned long addr;
+ unsigned long length;
+ char *parse = packet + 12;
+ if (*parse == '\0')
+ {
+ ERROR("incomplete vFlashErase packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
+
+ addr = strtoul(parse, &parse, 16);
+
+ if (*(parse++) != ',' || *parse == '\0')
+ {
+ ERROR("incomplete vFlashErase packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
+
+ length = strtoul(parse, &parse, 16);
+
+ if (*parse != '\0')
+ {
+ ERROR("incomplete vFlashErase packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
+
+ /* perform erase */
+ if ((result = flash_erase(gdb_service->target, addr, length)) != ERROR_OK)
+ {
+ /* GDB doesn't evaluate the actual error number returned,
+ * treat a failed erase as an I/O error
+ */
+ gdb_send_error(connection, EIO);
+ ERROR("flash_erase returned %i", result);
+ }
+ else
+ gdb_put_packet(connection, "OK", 2);
+
+ return ERROR_OK;
+ }
+
+ if (strstr(packet, "vFlashWrite:"))
+ {
+ unsigned long addr;
+ unsigned long length;
+ char *parse = packet + 12;
+
+ if (*parse == '\0')
+ {
+ ERROR("incomplete vFlashErase packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
+ addr = strtoul(parse, &parse, 16);
+ if (*(parse++) != ':')
+ {
+ ERROR("incomplete vFlashErase packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
+ length = packet_size - (parse - packet);
+
+ /* create a new image if there isn't already one */
+ if (gdb_connection->vflash_image == NULL)
+ {
+ gdb_connection->vflash_image = malloc(sizeof(image_t));
+ image_open(gdb_connection->vflash_image, "", "build");
+ }
+
+ /* create new section with content from packet buffer */
+ image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (u8*)parse);
+
+ gdb_put_packet(connection, "OK", 2);
+
+ return ERROR_OK;
+ }
+
+ if (!strcmp(packet, "vFlashDone"))
+ {
+ u32 image_size;
+ char *error_str;
+ u32 *failed = malloc(sizeof(u32) * gdb_connection->vflash_image->num_sections);
+
+ /* process the flashing buffer */
+ if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &image_size, &error_str, failed)) != ERROR_OK)
+ {
+ if (result == ERROR_FLASH_DST_OUT_OF_BANK)
+ gdb_put_packet(connection, "E.memtype", 9);
+ else
+ gdb_send_error(connection, EIO);
+
+ ERROR("flash writing failed: %s", error_str);
+ free(error_str);
+ }
+ else
+ {
+ DEBUG("wrote %u bytes from vFlash image to flash", image_size);
+ gdb_put_packet(connection, "OK", 2);
+ }
+
+ free(failed);
+
+ image_close(gdb_connection->vflash_image);
+ free(gdb_connection->vflash_image);
+ gdb_connection->vflash_image = NULL;
+
+ return ERROR_OK;
+ }
+
+ gdb_put_packet(connection, "", 0);
+ return ERROR_OK;
+}
+
int gdb_input(connection_t *connection)
{
gdb_service_t *gdb_service = connection->service->priv;
case ERROR_SERVER_REMOTE_CLOSED:
return ERROR_SERVER_REMOTE_CLOSED;
default:
- ERROR("unexpected error");
+ ERROR("BUG: unexpected error");
exit(-1);
}
}
-
+
/* terminate with zero */
packet[packet_size] = 0;
-
+
DEBUG("recevied packet: '%s'", packet);
-
+
if (packet_size > 0)
{
+ retval = ERROR_OK;
switch (packet[0])
{
case 'H':
/* Hct... -- set thread
- * we don't have threads, send empty reply */
+ * we don't have threads, send empty reply */
gdb_put_packet(connection, NULL, 0);
break;
case 'q':
gdb_query_packet(connection, packet, packet_size);
break;
case 'g':
- gdb_get_registers_packet(connection, target, packet, packet_size);
+ retval = gdb_get_registers_packet(connection, target, packet, packet_size);
break;
case 'G':
- gdb_set_registers_packet(connection, target, packet, packet_size);
+ retval = gdb_set_registers_packet(connection, target, packet, packet_size);
break;
case 'p':
- gdb_get_register_packet(connection, target, packet, packet_size);
+ retval = gdb_get_register_packet(connection, target, packet, packet_size);
break;
case 'P':
- gdb_set_register_packet(connection, target, packet, packet_size);
+ retval = gdb_set_register_packet(connection, target, packet, packet_size);
break;
case 'm':
- gdb_read_memory_packet(connection, target, packet, packet_size);
+ retval = gdb_read_memory_packet(connection, target, packet, packet_size);
break;
case 'M':
- gdb_write_memory_packet(connection, target, packet, packet_size);
+ retval = gdb_write_memory_packet(connection, target, packet, packet_size);
break;
case 'z':
case 'Z':
- gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);
+ retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);
break;
case '?':
gdb_last_signal_packet(connection, target, packet, packet_size);
- break;
+ break;
case 'c':
case 's':
gdb_step_continue_packet(connection, target, packet, packet_size);
break;
+ case 'v':
+ retval = gdb_v_packet(connection, target, packet, packet_size);
+ break;
case 'D':
target->type->resume(target, 1, 0, 1, 0);
gdb_put_packet(connection, "OK", 2);
break;
case 'X':
- gdb_write_memory_binary_packet(connection, target, packet, packet_size);
+ if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK)
+ return retval;
break;
case 'k':
gdb_put_packet(connection, "OK", 2);
gdb_put_packet(connection, NULL, 0);
break;
}
+
+ /* if a packet handler returned an error, exit input loop */
+ if (retval != ERROR_OK)
+ return retval;
}
-
+
if (gdb_con->ctrl_c)
{
if (target->state == TARGET_RUNNING)
gdb_con->ctrl_c = 0;
}
}
-
+
} while (gdb_con->buf_cnt > 0);
return ERROR_OK;
gdb_service_t *gdb_service;
target_t *target = targets;
int i = 0;
-
+
if (!target)
{
WARNING("no gdb ports allocated as no target has been specified");
return ERROR_OK;
}
-
+
if (gdb_port == 0)
{
WARNING("no gdb port specified, using default port 3333");
gdb_port = 3333;
}
-
+
while (target)
{
char service_name[8];
-
+
snprintf(service_name, 8, "gdb-%2.2i", i);
-
+
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);
-
+
DEBUG("gdb service for target %s at port %i", target->type->name, gdb_port + i);
-
+
+ i++;
target = target->next;
}
-
+
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, "");
-
+ COMMAND_CONFIG, "");
+
return ERROR_OK;
}
projects / openocd / blobdiff