#include "server.h"
#include "log.h"
#include "binarybuffer.h"
+#include "jtag.h"
#include "breakpoints.h"
+#include "flash.h"
+#include "target_request.h"
-#define __USE_GNU
#include <string.h>
#include <errno.h>
#include <unistd.h>
static unsigned short gdb_port;
+static void gdb_log_callback(void *privData, const char *file, int line,
+ const char *function, const char *format, va_list args);
+
+
+enum gdb_detach_mode
+{
+ GDB_DETACH_RESUME,
+ GDB_DETACH_RESET,
+ GDB_DETACH_HALT,
+ GDB_DETACH_NOTHING
+};
+
+/* target behaviour on gdb detach */
+enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME;
+
+/* set if we are sending a memory map to gdb
+ * via qXfer:memory-map:read packet */
+int gdb_use_memory_map = 0;
+int gdb_flash_program = 0;
+
int gdb_last_signal(target_t *target)
{
switch (target->debug_reason)
int gdb_get_char(connection_t *connection, int* next_char)
{
gdb_connection_t *gdb_con = connection->priv;
+
+#ifdef _DEBUG_GDB_IO_
char *debug_buffer;
-
+#endif
+
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;
}
{
if (gdb_con->buf_cnt == 0)
return ERROR_SERVER_REMOTE_CLOSED;
-
+
#ifdef _WIN32
errno = WSAGetLastError();
break;
case WSAECONNABORTED:
return ERROR_SERVER_REMOTE_CLOSED;
+ case WSAECONNRESET:
+ return ERROR_SERVER_REMOTE_CLOSED;
default:
ERROR("read: %d", errno);
exit(-1);
}
#endif
}
-
+
+#ifdef _DEBUG_GDB_IO_
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;
DEBUG("received '%s'", debug_buffer);
free(debug_buffer);
+#endif
gdb_con->buf_p = gdb_con->buffer;
gdb_con->buf_cnt--;
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;
{
ERROR("BUG: couldn't put character back");
}
-
+
return ERROR_OK;
}
-int gdb_put_packet(connection_t *connection, char *buffer, int len)
+int gdb_put_packet_inner(connection_t *connection, char *buffer, int len)
{
int i;
unsigned char my_checksum = 0;
char checksum[3];
+#ifdef _DEBUG_GDB_IO_
char *debug_buffer;
+#endif
int reply;
int retval;
gdb_connection_t *gdb_con = connection->priv;
for (i = 0; i < len; i++)
my_checksum += buffer[i];
-
+
while (1)
{
-
+#ifdef _DEBUG_GDB_IO_
debug_buffer = malloc(len + 1);
memcpy(debug_buffer, buffer, len);
debug_buffer[len] = 0;
DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
free(debug_buffer);
-
+#endif
write_socket(connection->fd, "$", 1);
if (len > 0)
write_socket(connection->fd, buffer, len);
write_socket(connection->fd, "#", 1);
-
+
snprintf(checksum, 3, "%2.2x", my_checksum);
-
+
write_socket(connection->fd, checksum, 2);
if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
return ERROR_SERVER_REMOTE_CLOSED;
}
}
-
+
return ERROR_OK;
}
-int gdb_get_packet(connection_t *connection, char *buffer, int *len)
+int gdb_put_packet(connection_t *connection, char *buffer, int len)
+{
+ gdb_connection_t *gdb_connection = connection->priv;
+ gdb_connection->output_disable=1;
+ int retval=gdb_put_packet_inner(connection, buffer, len);
+ gdb_connection->output_disable=0;
+ return retval;
+}
+
+int gdb_get_packet_inner(connection_t *connection, char *buffer, int *len)
{
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;
+#ifdef _DEBUG_GDB_IO_
DEBUG("character: '%c'", character);
+#endif
switch (character)
{
} while (character != '$');
my_checksum = 0;
-
- do
+
+ count=0;
+ gdb_connection_t *gdb_con = connection->priv;
+ for (;;)
{
- if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
- return retval;
-
- if( !first_char ) {
- packet_type = character;
- first_char = 1;
- }
-
- if( packet_type == 'X' )
+ /* The common case is that we have an entire packet with no escape chars.
+ * We need to leave at least 2 bytes in the buffer to have
+ * gdb_get_char() update various bits and bobs correctly.
+ */
+ if ((gdb_con->buf_cnt > 2) && ((gdb_con->buf_cnt+count) < *len))
{
- switch (character)
+ /* The compiler will struggle a bit with constant propagation and
+ * aliasing, so we help it by showing that these values do not
+ * change inside the loop
+ */
+ int i;
+ char *buf = gdb_con->buf_p;
+ int run = gdb_con->buf_cnt - 2;
+ i = 0;
+ int done = 0;
+ while (i < run)
{
- case '#':
+ character = *buf++;
+ i++;
+ if (character == '#')
+ {
+ /* Danger! character can be '#' when esc is
+ * used so we need an explicit boolean for done here.
+ */
+ done = 1;
break;
- case 0x7d:
+ }
+
+ if (character == '}')
+ {
/* data transmitted in binary mode (X packet)
- * uses 0x7d as escape character */
+ * uses 0x7d as escape character */
my_checksum += character & 0xff;
- gdb_get_char(connection, &character);
+ character = *buf++;
+ i++;
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;
+ } else
+ {
my_checksum += character & 0xff;
- if (count > *len)
- {
- ERROR("packet buffer too small");
- return ERROR_GDB_BUFFER_TOO_SMALL;
- }
- break;
+ buffer[count++] = character & 0xff;
+ }
}
+ gdb_con->buf_p += i;
+ gdb_con->buf_cnt -= i;
+ if (done)
+ break;
+ }
+ if (count > *len)
+ {
+ ERROR("packet buffer too small");
+ return ERROR_GDB_BUFFER_TOO_SMALL;
+ }
+
+ if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
+ return retval;
+
+ if (character == '#')
+ break;
+
+ if (character == '}')
+ {
+ /* 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;
}
- } while (character != '#');
+
+ }
*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_socket(connection->fd, "+", 1);
return ERROR_OK;
}
-int gdb_output(struct command_context_s *context, char* line)
+int gdb_get_packet(connection_t *connection, char *buffer, int *len)
{
- connection_t *connection = context->output_handler_priv;
+ gdb_connection_t *gdb_connection = connection->priv;
+ gdb_connection->output_disable=1;
+ int retval=gdb_get_packet_inner(connection, buffer, len);
+ gdb_connection->output_disable=0;
+ return retval;
+}
+
+int gdb_output_con(connection_t *connection, char* line)
+{
+ gdb_connection_t *gdb_connection = connection->priv;
char *hex_buffer;
int i, bin_size;
- bin_size = strlen(line);
+ /* check if output is enabled */
+ if (gdb_connection->output_disable)
+ {
+ return ERROR_OK;
+ }
+ bin_size = strlen(line);
+
hex_buffer = malloc(bin_size*2 + 4);
hex_buffer[0] = 'O';
return ERROR_OK;
}
+int gdb_output(struct command_context_s *context, char* line)
+{
+ connection_t *connection = context->output_handler_priv;
+ return gdb_output_con(connection, line);
+}
+
+int gdb_program_handler(struct target_s *target, enum target_event event, void *priv)
+{
+ FILE *script;
+ struct command_context_s *cmd_ctx = priv;
+
+ if (target->gdb_program_script)
+ {
+ script = fopen(target->gdb_program_script, "r");
+ if (!script)
+ {
+ ERROR("couldn't open script file %s", target->gdb_program_script);
+ return ERROR_OK;
+ }
+
+ INFO("executing gdb_program script '%s'", target->gdb_program_script);
+ command_run_file(cmd_ctx, script, COMMAND_EXEC);
+ fclose(script);
+
+ jtag_execute_queue();
+ }
+
+ return ERROR_OK;
+}
+
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:
if (gdb_connection->frontend_state == TARGET_RUNNING)
{
+ // stop forwarding log packets!
+ log_setCallback(NULL, NULL);
+
if (gdb_connection->ctrl_c)
{
signal = 0x2;
{
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_connection->frontend_state = TARGET_RUNNING;
}
break;
+ case TARGET_EVENT_GDB_PROGRAM:
+ gdb_program_handler(target, event, connection->cmd_ctx);
+ break;
default:
break;
}
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;
+ gdb_connection->output_disable = 0;
/* 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);
+ connection->priv = NULL;
+ }
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);
+ 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_str_to_target(target_t *target, char *str, char *tstr)
+/* Convert register to string of bits. NB! The # of bits in the
+ * register might be non-divisible by 8(a byte), in which
+ * case an entire byte is shown. */
+void gdb_str_to_target(target_t *target, char *tstr, reg_t *reg)
{
- int str_len = strlen(str);
+ static const char *DIGITS = "0123456789abcdef";
int i;
-
- if (str_len % 2)
- {
- ERROR("BUG: gdb value with uneven number of characters encountered: %s", str);
- exit(-1);
- }
-
+
+ u8 *buf;
+ int buf_len;
+ buf = reg->value;
+ buf_len = CEIL(reg->size, 8);
+
if (target->endianness == TARGET_LITTLE_ENDIAN)
{
- for (i = 0; i < str_len; i+=2)
+ for (i = 0; i < buf_len; i++)
{
- tstr[str_len - i - 1] = str[i + 1];
- tstr[str_len - i - 2] = str[i];
+ tstr[i*2] = DIGITS[(buf[i]>>4) & 0xf];
+ tstr[i*2+1] = DIGITS[buf[i]&0xf];
}
}
else
{
- for (i = 0; i < str_len; i++)
+ for (i = 0; i < buf_len; i++)
{
- tstr[i] = str[i];
+ tstr[(buf_len-1-i)*2] = DIGITS[(buf[i]>>4)&0xf];
+ tstr[(buf_len-1-i)*2+1] = DIGITS[buf[i]&0xf];
}
}
}
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)
char *reg_packet;
char *reg_packet_p;
int i;
-
- DEBUG("");
+
+#ifdef _DEBUG_GDB_IO_
+ DEBUG("-");
+#endif
if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
{
{
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++)
{
- char *hex_buf = buf_to_str(reg_list[i]->value, reg_list[i]->size, 16);
- DEBUG("hex_buf: %s", hex_buf);
- gdb_str_to_target(target, hex_buf, reg_packet_p);
+ gdb_str_to_target(target, reg_packet_p, reg_list[i]);
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);
-
+#ifdef _DEBUG_GDB_IO_
+ {
+ char *reg_packet_p;
+ reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2);
+ DEBUG("reg_packet: %s", reg_packet_p);
+ free(reg_packet_p);
+ }
+#endif
+
gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2);
free(reg_packet);
-
+
free(reg_list);
-
+
return ERROR_OK;
}
int reg_list_size;
int retval;
char *packet_p;
-
- DEBUG("");
+
+#ifdef _DEBUG_GDB_IO_
+ DEBUG("-");
+#endif
/* skip command character */
packet++;
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);
/* 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;
}
reg_t **reg_list;
int reg_list_size;
int retval;
- char *hex_buf;
-
- DEBUG("");
-
+
+#ifdef _DEBUG_GDB_IO_
+ DEBUG("-");
+#endif
+
if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
{
switch (retval)
exit(-1);
}
}
-
+
if (reg_list_size <= reg_num)
{
ERROR("gdb requested a non-existing register");
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_str_to_target(target, reg_packet, reg_list[reg_num]);
+
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;
}
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)
exit(-1);
}
}
-
+
if (reg_list_size < reg_num)
{
ERROR("gdb requested a non-existing register");
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);
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;
ERROR("BUG: unexpected error %i", retval);
exit(-1);
}
-
+
return ERROR_OK;
}
packet++;
addr = strtoul(packet, &separator, 16);
-
+
if (*separator != ',')
{
ERROR("incomplete read memory packet received, dropping connection");
retval = target->type->read_memory(target, addr, 1, len, buffer);
}
+#if 0
+ if (retval == ERROR_TARGET_DATA_ABORT)
+ {
+ /* TODO : Here we have to lie and send back all zero's lest stack traces won't work.
+ * At some point this might be fixed in GDB, in which case this code can be removed.
+ * http://sourceware.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=2395
+ */
+ memset(buffer, 0, len);
+ retval = ERROR_OK;
+ }
+#endif
+
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
}
free(buffer);
-
+
return ERROR_OK;
}
packet++;
addr = strtoul(packet, &separator, 16);
-
+
if (*separator != ',')
{
ERROR("incomplete write memory packet received, dropping connection");
case 1:
retval = target->type->write_memory(target, addr, 1, len, buffer);
break;
- /* handle bulk writes */
+ /* handle bulk writes */
default:
retval = target_write_buffer(target, addr, len, buffer);
break;
if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
return retval;
}
-
+
free(buffer);
-
+
return ERROR_OK;
}
packet++;
addr = strtoul(packet, &separator, 16);
-
+
if (*separator != ',')
{
ERROR("incomplete write memory binary packet received, dropping connection");
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:
retval = target_write_buffer(target, addr, len, buffer);
break;
}
-
+
free(buffer);
}
if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
return retval;
}
-
+
return ERROR_OK;
}
int current = 0;
u32 address = 0x0;
- DEBUG("");
+ DEBUG("-");
if (packet_size > 1)
{
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 != ',')
{
ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
return ERROR_OK;
}
-void gdb_query_packet(connection_t *connection, char *packet, int packet_size)
+/* print out a string and allocate more space as needed, mainly used for XML at this point */
+void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, ...)
{
- command_context_t *cmd_ctx = connection->cmd_ctx;
+ if (*retval != ERROR_OK)
+ {
+ return;
+ }
+ int first = 1;
+
+ for (;;)
+ {
+ if ((*xml == NULL) || (!first))
+ {
+ /* start by 0 to exercise all the code paths.
+ * Need minimum 2 bytes to fit 1 char and 0 terminator. */
+
+ *size = *size * 2 + 2;
+ char *t = *xml;
+ *xml = realloc(*xml, *size);
+ if (*xml == NULL)
+ {
+ if (t)
+ free(t);
+ *retval = ERROR_SERVER_REMOTE_CLOSED;
+ return;
+ }
+ }
+
+ va_list ap;
+ int ret;
+ va_start(ap, fmt);
+ ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap);
+ va_end(ap);
+ if ((ret > 0) && ((ret + 1) < *size - *pos))
+ {
+ *pos += ret;
+ return;
+ }
+ /* there was just enough or not enough space, allocate more. */
+ first = 0;
+ }
+}
+
+static int decode_xfer_read (char *buf, char **annex, int *ofs, unsigned int *len)
+{
+ char *separator;
+
+ /* Extract and NUL-terminate the annex. */
+ *annex = buf;
+ while (*buf && *buf != ':')
+ buf++;
+ if (*buf == '\0')
+ return -1;
+ *buf++ = 0;
+
+ /* After the read marker and annex, qXfer looks like a
+ * traditional 'm' packet. */
+
+ *ofs = strtoul(buf, &separator, 16);
+
+ if (*separator != ',')
+ return -1;
+ *len = strtoul(separator+1, NULL, 16);
+
+ return 0;
+}
+
+int gdb_calc_blocksize(flash_bank_t *bank)
+{
+ int i;
+ int block_size = 0xffffffff;
+
+ /* loop through all sectors and return smallest sector size */
+
+ for (i = 0; i < bank->num_sectors; i++)
+ {
+ if (bank->sectors[i].size < block_size)
+ block_size = bank->sectors[i].size;
+ }
+
+ return block_size;
+}
+
+int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
+{
+ command_context_t *cmd_ctx = connection->cmd_ctx;
+
if (strstr(packet, "qRcmd,"))
{
if (packet_size > 6)
cmd[i] = tmp;
}
cmd[(packet_size - 6)/2] = 0x0;
+
+ /* We want to print all debug output to GDB connection */
+ log_setCallback(gdb_log_callback, connection);
+ target_call_timer_callbacks();
command_run_line(cmd_ctx, cmd);
free(cmd);
}
gdb_put_packet(connection, "OK", 2);
- return;
+ return ERROR_OK;
+ }
+ else if (strstr(packet, "qCRC:"))
+ {
+ if (packet_size > 5)
+ {
+ int retval;
+ u8 gdb_reply[10];
+ char *separator;
+ u32 checksum;
+ u32 addr = 0;
+ u32 len = 0;
+
+ /* skip command character */
+ packet += 5;
+
+ addr = strtoul(packet, &separator, 16);
+
+ if (*separator != ',')
+ {
+ ERROR("incomplete read memory packet received, dropping connection");
+ return ERROR_SERVER_REMOTE_CLOSED;
+ }
+
+ len = strtoul(separator + 1, NULL, 16);
+
+ retval = target_checksum_memory(target, addr, len, &checksum);
+
+ if (retval == ERROR_OK)
+ {
+ snprintf(gdb_reply, 10, "C%8.8x", checksum);
+ gdb_put_packet(connection, gdb_reply, 9);
+ }
+ else
+ {
+ if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
+ return retval;
+ }
+
+ return ERROR_OK;
+ }
+ }
+ else if (strstr(packet, "qSupported"))
+ {
+ /* we currently support packet size and qXfer:memory-map:read (if enabled)
+ * disable qXfer:features:read for the moment */
+ int retval = ERROR_OK;
+ char *buffer = NULL;
+ int pos = 0;
+ int size = 0;
+
+ xml_printf(&retval, &buffer, &pos, &size,
+ "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-",
+ (GDB_BUFFER_SIZE - 1), gdb_use_memory_map == 1 ? '+' : '-');
+
+ if (retval != ERROR_OK)
+ {
+ gdb_send_error(connection, 01);
+ return ERROR_OK;
+ }
+
+ gdb_put_packet(connection, buffer, strlen(buffer));
+ free(buffer);
+
+ return ERROR_OK;
+ }
+ else if (strstr(packet, "qXfer:memory-map:read::"))
+ {
+ /* We get away with only specifying flash here. Regions that are not
+ * specified are treated as if we provided no memory map(if not we
+ * could detect the holes and mark them as RAM).
+ * Normally we only execute this code once, but no big deal if we
+ * have to regenerate it a couple of times. */
+
+ flash_bank_t *p;
+ char *xml = NULL;
+ int size = 0;
+ int pos = 0;
+ int retval = ERROR_OK;
+
+ int offset;
+ int length;
+ char *separator;
+ int blocksize;
+
+ /* skip command character */
+ packet += 23;
+
+ offset = strtoul(packet, &separator, 16);
+ length = strtoul(separator + 1, &separator, 16);
+
+ xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");
+
+ int i = 0;
+ for (;;)
+ {
+ p = get_flash_bank_by_num(i);
+ if (p == NULL)
+ break;
+
+ /* if device has uneven sector sizes, eg. str7, lpc
+ * we pass the smallest sector size to gdb memory map */
+ blocksize = gdb_calc_blocksize(p);
+
+ xml_printf(&retval, &xml, &pos, &size, "<memory type=\"flash\" start=\"0x%x\" length=\"0x%x\">\n" \
+ "<property name=\"blocksize\">0x%x</property>\n" \
+ "</memory>\n", \
+ p->base, p->size, blocksize);
+ i++;
+ }
+
+ xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");
+
+ if (retval != ERROR_OK)
+ {
+ gdb_send_error(connection, retval);
+ return retval;
+ }
+
+ if (offset + length > pos)
+ {
+ length = pos - offset;
+ }
+
+ char *t = malloc(length + 1);
+ t[0] = 'l';
+ memcpy(t + 1, xml + offset, length);
+ gdb_put_packet(connection, t, length + 1);
+
+ free(t);
+ free(xml);
+ return ERROR_OK;
+ }
+ else if (strstr(packet, "qXfer:features:read:"))
+ {
+ char *xml = NULL;
+ int size = 0;
+ int pos = 0;
+ int retval = ERROR_OK;
+
+ int offset;
+ int length;
+ char *annex;
+
+ /* skip command character */
+ packet += 20;
+
+ if (decode_xfer_read( packet, &annex, &offset, &length ) < 0)
+ {
+ gdb_send_error(connection, 01);
+ return ERROR_OK;
+ }
+
+ if (strcmp(annex, "target.xml") != 0)
+ {
+ gdb_send_error(connection, 01);
+ return ERROR_OK;
+ }
+
+ xml_printf(&retval, &xml, &pos, &size, \
+ "l<target version=\"1.0\">\n<architecture>arm</architecture>\n</target>\n");
+
+ if (retval != ERROR_OK)
+ {
+ gdb_send_error(connection, retval);
+ return retval;
+ }
+
+ gdb_put_packet(connection, xml, strlen(xml) + 1);
+
+ free(xml);
+ return ERROR_OK;
+ }
+
+ gdb_put_packet(connection, "", 0);
+ return ERROR_OK;
+}
+
+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 flash programming disabled - send a empty reply */
+
+ if (gdb_flash_program == 0)
+ {
+ gdb_put_packet(connection, "", 0);
+ return ERROR_OK;
}
+ 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;
+ }
+
+ /* disable gdb output while programming */
+ gdb_connection->output_disable = 1;
+
+ /* assume all sectors need erasing - stops any problems
+ * when flash_write is called multiple times */
+ flash_set_dirty();
+
+ /* perform any target specific operations before the erase */
+ target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_PROGRAM);
+
+ /* perform erase */
+ if ((result = flash_erase_address_range(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);
+
+ /* reenable gdb output */
+ gdb_connection->output_disable = 0;
+
+ 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);
+
+ /* disable gdb output while programming */
+ gdb_connection->output_disable = 1;
+
+ /* 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);
+
+ /* reenable gdb output */
+ gdb_connection->output_disable = 0;
+
+ return ERROR_OK;
+ }
+
+ if (!strcmp(packet, "vFlashDone"))
+ {
+ u32 written;
+ char *error_str;
+
+ /* disable gdb output while programming */
+ gdb_connection->output_disable = 1;
+
+ /* process the flashing buffer. No need to erase as GDB
+ * always issues a vFlashErase first. */
+ if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, &error_str, NULL, 0)) != ERROR_OK)
+ {
+ if (result == ERROR_FLASH_DST_OUT_OF_BANK)
+ gdb_put_packet(connection, "E.memtype", 9);
+ else
+ gdb_send_error(connection, EIO);
+
+ if (error_str)
+ {
+ ERROR("flash writing failed: %s", error_str);
+ free(error_str);
+ }
+ }
+ else
+ {
+ DEBUG("wrote %u bytes from vFlash image to flash", written);
+ gdb_put_packet(connection, "OK", 2);
+ }
+
+ image_close(gdb_connection->vflash_image);
+ free(gdb_connection->vflash_image);
+ gdb_connection->vflash_image = NULL;
+
+ /* reenable gdb output */
+ gdb_connection->output_disable = 0;
+
+ return ERROR_OK;
+ }
+
gdb_put_packet(connection, "", 0);
+ return ERROR_OK;
+}
+
+int gdb_detach(connection_t *connection, target_t *target)
+{
+ switch( detach_mode )
+ {
+ case GDB_DETACH_RESUME:
+ target->type->resume(target, 1, 0, 1, 0);
+ break;
+
+ case GDB_DETACH_RESET:
+ target_process_reset(connection->cmd_ctx);
+ break;
+
+ case GDB_DETACH_HALT:
+ target->type->halt(target);
+ break;
+
+ case GDB_DETACH_NOTHING:
+ break;
+ }
+
+ gdb_put_packet(connection, "OK", 2);
+
+ return ERROR_OK;
+}
+
+
+
+static void gdb_log_callback(void *privData, const char *file, int line,
+ const char *function, const char *format, va_list args)
+{
+ connection_t *connection=(connection_t *)privData;
+
+ char *t=allocPrintf(format, args);
+ if (t==NULL)
+ return;
+
+ gdb_output_con(connection, t);
+
+ free(t);
}
int gdb_input(connection_t *connection)
int packet_size;
int retval;
gdb_connection_t *gdb_con = connection->priv;
+ static int extended_protocol = 0;
/* drain input buffer */
do
exit(-1);
}
}
-
+
/* terminate with zero */
packet[packet_size] = 0;
-
- DEBUG("recevied packet: '%s'", packet);
-
+
+ DEBUG("received packet: '%s'", packet);
+
if (packet_size > 0)
{
retval = ERROR_OK;
{
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);
+ retval = gdb_query_packet(connection, target, packet, packet_size);
break;
case 'g':
retval = gdb_get_registers_packet(connection, target, packet, packet_size);
break;
case '?':
gdb_last_signal_packet(connection, target, packet, packet_size);
- break;
+ break;
case 'c':
case 's':
+ /* We're running/stepping, in which case we can
+ * forward log output until the target is halted */
+ log_setCallback(gdb_log_callback, connection);
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);
+ retval = gdb_detach(connection, target);
+ extended_protocol = 0;
break;
case 'X':
if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK)
return retval;
break;
case 'k':
+ if (extended_protocol != 0)
+ break;
gdb_put_packet(connection, "OK", 2);
return ERROR_SERVER_REMOTE_CLOSED;
+ case '!':
+ /* handle extended remote protocol */
+ extended_protocol = 1;
+ gdb_put_packet(connection, "OK", 2);
+ break;
+ case 'R':
+ /* handle extended restart packet */
+ target_process_reset(connection->cmd_ctx);
+ break;
default:
/* ignore unkown packets */
DEBUG("ignoring 0x%2.2x packet", packet[0]);
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;
}
return ERROR_OK;
}
+int handle_gdb_detach_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ if (argc == 1)
+ {
+ if (strcmp(args[0], "resume") == 0)
+ {
+ detach_mode = GDB_DETACH_RESUME;
+ return ERROR_OK;
+ }
+ else if (strcmp(args[0], "reset") == 0)
+ {
+ detach_mode = GDB_DETACH_RESET;
+ return ERROR_OK;
+ }
+ else if (strcmp(args[0], "halt") == 0)
+ {
+ detach_mode = GDB_DETACH_HALT;
+ return ERROR_OK;
+ }
+ else if (strcmp(args[0], "nothing") == 0)
+ {
+ detach_mode = GDB_DETACH_NOTHING;
+ return ERROR_OK;
+ }
+ }
+
+ WARNING("invalid gdb_detach configuration directive: %s", args[0]);
+ return ERROR_OK;
+}
+
+int handle_gdb_memory_map_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ if (argc == 1)
+ {
+ if (strcmp(args[0], "enable") == 0)
+ {
+ gdb_use_memory_map = 1;
+ return ERROR_OK;
+ }
+ else if (strcmp(args[0], "disable") == 0)
+ {
+ gdb_use_memory_map = 0;
+ return ERROR_OK;
+ }
+ }
+
+ WARNING("invalid gdb_memory_map configuration directive: %s", args[0]);
+ return ERROR_OK;
+}
+
+int handle_gdb_flash_program_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ if (argc == 1)
+ {
+ if (strcmp(args[0], "enable") == 0)
+ {
+ gdb_flash_program = 1;
+ return ERROR_OK;
+ }
+ else if (strcmp(args[0], "disable") == 0)
+ {
+ gdb_flash_program = 0;
+ return ERROR_OK;
+ }
+ }
+
+ WARNING("invalid gdb_memory_map configuration directive: %s", args[0]);
+ 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, "");
+ register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command,
+ COMMAND_CONFIG, "");
+ register_command(command_context, NULL, "gdb_memory_map", handle_gdb_memory_map_command,
+ COMMAND_CONFIG, "");
+ register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command,
+ COMMAND_CONFIG, "");
return ERROR_OK;
}
Code Review / openocd.git / blobdiff