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- /***************************************************************************
- * Copyright (C) 2005 by Dominic Rath *
- * Dominic.Rath@gmx.de *
- * *
- * Copyright (C) 2007,2008 Øyvind Harboe *
- * oyvind.harboe@zylin.com *
- * *
- * Copyright (C) 2008 by Spencer Oliver *
- * spen@spen-soft.co.uk *
- * *
- * 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 *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
- ***************************************************************************/
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include "gdb_server.h"
- #include "target_request.h"
- #include "register.h"
- #include "server.h"
- #include "flash.h"
- #include "image.h"
- #include "jtag.h"
-
-
- #if 0
- #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 = 3333;
- static const char *DIGITS = "0123456789abcdef";
-
- static void gdb_log_callback(void *priv, const char *file, int line,
- const char *function, const char *string);
-
- 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;
-
- /* number of gdb connections, mainly to supress gdb related debugging spam
- * in helper/log.c when no gdb connections are actually active */
- int gdb_actual_connections;
-
- /* set if we are sending a memory map to gdb
- * via qXfer:memory-map:read packet */
- /* enabled by default*/
- int gdb_use_memory_map = 1;
- /* enabled by default*/
- int gdb_flash_program = 1;
-
- /* if set, data aborts cause an error to be reported in memory read packets
- * see the code in gdb_read_memory_packet() for further explanations */
- int gdb_report_data_abort = 0;
-
- int gdb_last_signal(target_t *target)
- {
- switch (target->debug_reason)
- {
- case DBG_REASON_DBGRQ:
- return 0x2; /* SIGINT */
- case DBG_REASON_BREAKPOINT:
- case DBG_REASON_WATCHPOINT:
- case DBG_REASON_WPTANDBKPT:
- return 0x05; /* SIGTRAP */
- case DBG_REASON_SINGLESTEP:
- return 0x05; /* SIGTRAP */
- case DBG_REASON_NOTHALTED:
- return 0x0; /* no signal... shouldn't happen */
- default:
- LOG_USER("undefined debug reason %d - target needs reset", target->debug_reason);
- return 0x0;
- }
- }
-
- int check_pending(connection_t *connection, int timeout_s, int *got_data)
- {
- /* a non-blocking socket will block if there is 0 bytes available on the socket,
- * but return with as many bytes as are available immediately
- */
- struct timeval tv;
- fd_set read_fds;
- gdb_connection_t *gdb_con = connection->priv;
- int t;
- if (got_data == NULL)
- got_data=&t;
- *got_data = 0;
-
- if (gdb_con->buf_cnt > 0)
- {
- *got_data = 1;
- return ERROR_OK;
- }
-
- FD_ZERO(&read_fds);
- FD_SET(connection->fd, &read_fds);
-
- tv.tv_sec = timeout_s;
- tv.tv_usec = 0;
- if (socket_select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0)
- {
- /* This can typically be because a "monitor" command took too long
- * before printing any progress messages
- */
- if (timeout_s > 0)
- {
- return ERROR_GDB_TIMEOUT;
- } else
- {
- return ERROR_OK;
- }
- }
- *got_data = FD_ISSET(connection->fd, &read_fds) != 0;
- return ERROR_OK;
- }
-
- int gdb_get_char(connection_t *connection, int* next_char)
- {
- gdb_connection_t *gdb_con = connection->priv;
- int retval = ERROR_OK;
-
- #ifdef _DEBUG_GDB_IO_
- char *debug_buffer;
- #endif
-
- if (gdb_con->buf_cnt-- > 0)
- {
- *next_char = *(gdb_con->buf_p++);
- if (gdb_con->buf_cnt > 0)
- connection->input_pending = 1;
- else
- connection->input_pending = 0;
-
- #ifdef _DEBUG_GDB_IO_
- LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
- #endif
-
- return ERROR_OK;
- }
-
- for (;;)
- {
- if (connection->service->type == CONNECTION_PIPE)
- {
- gdb_con->buf_cnt = read(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
- }
- else
- {
- retval = check_pending(connection, 1, NULL);
- if (retval != ERROR_OK)
- return retval;
- gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
- }
-
- if (gdb_con->buf_cnt > 0)
- {
- break;
- }
- if (gdb_con->buf_cnt == 0)
- {
- gdb_con->closed = 1;
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- #ifdef _WIN32
- errno = WSAGetLastError();
-
- switch (errno)
- {
- case WSAEWOULDBLOCK:
- usleep(1000);
- break;
- case WSAECONNABORTED:
- gdb_con->closed = 1;
- return ERROR_SERVER_REMOTE_CLOSED;
- case WSAECONNRESET:
- gdb_con->closed = 1;
- return ERROR_SERVER_REMOTE_CLOSED;
- default:
- LOG_ERROR("read: %d", errno);
- exit(-1);
- }
- #else
- switch (errno)
- {
- case EAGAIN:
- usleep(1000);
- break;
- case ECONNABORTED:
- gdb_con->closed = 1;
- return ERROR_SERVER_REMOTE_CLOSED;
- case ECONNRESET:
- gdb_con->closed = 1;
- return ERROR_SERVER_REMOTE_CLOSED;
- default:
- LOG_ERROR("read: %s", strerror(errno));
- gdb_con->closed = 1;
- return ERROR_SERVER_REMOTE_CLOSED;
- }
- #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;
- LOG_DEBUG("received '%s'", debug_buffer);
- free(debug_buffer);
- #endif
-
- gdb_con->buf_p = gdb_con->buffer;
- gdb_con->buf_cnt--;
- *next_char = *(gdb_con->buf_p++);
- if (gdb_con->buf_cnt > 0)
- connection->input_pending = 1;
- else
- connection->input_pending = 0;
- #ifdef _DEBUG_GDB_IO_
- LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
- #endif
-
- return retval;
- }
-
- 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
- {
- LOG_ERROR("BUG: couldn't put character back");
- }
-
- return ERROR_OK;
- }
-
- /* The only way we can detect that the socket is closed is the first time
- * we write to it, we will fail. Subsequent write operations will
- * succeed. Shudder! */
- int gdb_write(connection_t *connection, void *data, int len)
- {
- gdb_connection_t *gdb_con = connection->priv;
- if (gdb_con->closed)
- return ERROR_SERVER_REMOTE_CLOSED;
-
- if (connection->service->type == CONNECTION_PIPE)
- {
- /* write to stdout */
- if (write(STDOUT_FILENO, data, len) == len)
- {
- return ERROR_OK;
- }
- }
- else
- {
- if (write_socket(connection->fd, data, len) == len)
- {
- return ERROR_OK;
- }
- }
- gdb_con->closed = 1;
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- int gdb_put_packet_inner(connection_t *connection, char *buffer, int len)
- {
- int i;
- unsigned char my_checksum = 0;
- #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];
-
- #ifdef _DEBUG_GDB_IO_
- /*
- * At this point we should have nothing in the input queue from GDB,
- * however sometimes '-' is sent even though we've already received
- * an ACK (+) for everything we've sent off.
- */
- int gotdata;
- for (;;)
- {
- if ((retval = check_pending(connection, 0, &gotdata)) != ERROR_OK)
- return retval;
- if (!gotdata)
- break;
- if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
- return retval;
- if (reply == '$') {
- /* fix a problem with some IAR tools */
- gdb_putback_char(connection, reply);
- LOG_DEBUG("Unexpected start of new packet");
- break;
- }
-
- LOG_WARNING("Discard unexpected char %c", reply);
- }
- #endif
-
- while (1)
- {
- #ifdef _DEBUG_GDB_IO_
- debug_buffer = malloc(len + 1);
- memcpy(debug_buffer, buffer, len);
- debug_buffer[len] = 0;
- LOG_DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
- free(debug_buffer);
- #endif
-
- char local_buffer[1024];
- local_buffer[0] = '$';
- if ((size_t)len + 4 <= sizeof(local_buffer))
- {
- /* performance gain on smaller packets by only a single call to gdb_write() */
- memcpy(local_buffer + 1, buffer, len++);
- local_buffer[len++] = '#';
- local_buffer[len++] = DIGITS[(my_checksum >> 4) & 0xf];
- local_buffer[len++] = DIGITS[my_checksum & 0xf];
- if ((retval = gdb_write(connection, local_buffer, len)) != ERROR_OK)
- {
- return retval;
- }
- }
- else
- {
- /* larger packets are transmitted directly from caller supplied buffer
- by several calls to gdb_write() to avoid dynamic allocation */
- local_buffer[1] = '#';
- local_buffer[2] = DIGITS[(my_checksum >> 4) & 0xf];
- local_buffer[3] = DIGITS[my_checksum & 0xf];
- if ((retval = gdb_write(connection, local_buffer, 1)) != ERROR_OK)
- {
- return retval;
- }
- if ((retval = gdb_write(connection, buffer, len)) != ERROR_OK)
- {
- return retval;
- }
- if ((retval = gdb_write(connection, local_buffer + 1, 3)) != ERROR_OK)
- {
- return retval;
- }
- }
-
- if (gdb_con->noack_mode)
- break;
-
- if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
- return retval;
-
- if (reply == '+')
- break;
- else if (reply == '-')
- {
- /* Stop sending output packets for now */
- log_remove_callback(gdb_log_callback, connection);
- LOG_WARNING("negative reply, retrying");
- }
- else if (reply == 0x3)
- {
- gdb_con->ctrl_c = 1;
- if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
- return retval;
- if (reply == '+')
- break;
- else if (reply == '-')
- {
- /* Stop sending output packets for now */
- log_remove_callback(gdb_log_callback, connection);
- LOG_WARNING("negative reply, retrying");
- }
- else if (reply == '$') {
- LOG_ERROR("GDB missing ack(1) - assumed good");
- gdb_putback_char(connection, reply);
- return ERROR_OK;
- } else {
-
- LOG_ERROR("unknown character(1) 0x%2.2x in reply, dropping connection", reply);
- gdb_con->closed = 1;
- return ERROR_SERVER_REMOTE_CLOSED;
- }
- }
- else if (reply == '$') {
- LOG_ERROR("GDB missing ack(2) - assumed good");
- gdb_putback_char(connection, reply);
- return ERROR_OK;
- }
- else
- {
- LOG_ERROR("unknown character(2) 0x%2.2x in reply, dropping connection", reply);
- gdb_con->closed = 1;
- return ERROR_SERVER_REMOTE_CLOSED;
- }
- }
- if (gdb_con->closed)
- return ERROR_SERVER_REMOTE_CLOSED;
-
- return ERROR_OK;
- }
-
- int gdb_put_packet(connection_t *connection, char *buffer, int len)
- {
- gdb_connection_t *gdb_con = connection->priv;
- gdb_con->busy = 1;
- int retval = gdb_put_packet_inner(connection, buffer, len);
- gdb_con->busy = 0;
-
- /* we sent some data, reset timer for keep alive messages */
- kept_alive();
-
- return retval;
- }
-
- static __inline__ int fetch_packet(connection_t *connection, int *checksum_ok, int noack, int *len, char *buffer)
- {
- unsigned char my_checksum = 0;
- char checksum[3];
- int character;
- int retval;
-
- gdb_connection_t *gdb_con = connection->priv;
- my_checksum = 0;
- int count = 0;
- count = 0;
- for (;;)
- {
- /* 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))
- {
- /* 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)
- {
- 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;
- }
-
- if (character == '}')
- {
- /* data transmitted in binary mode (X packet)
- * uses 0x7d as escape character */
- my_checksum += character & 0xff;
- character = *buf++;
- i++;
- my_checksum += character & 0xff;
- buffer[count++] = (character ^ 0x20) & 0xff;
- }
- else
- {
- my_checksum += character & 0xff;
- buffer[count++] = character & 0xff;
- }
- }
- gdb_con->buf_p += i;
- gdb_con->buf_cnt -= i;
- if (done)
- break;
- }
- if (count > *len)
- {
- LOG_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
- {
- my_checksum += character & 0xff;
- buffer[count++] = character & 0xff;
- }
- }
-
- *len = count;
-
- if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
- return retval;
- checksum[0] = character;
- if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
- return retval;
- checksum[1] = character;
- checksum[2] = 0;
-
- if (!noack)
- {
- *checksum_ok = (my_checksum == strtoul(checksum, NULL, 16));
- }
-
- return ERROR_OK;
- }
-
- int gdb_get_packet_inner(connection_t *connection, char *buffer, int *len)
- {
- int character;
- int retval;
- gdb_connection_t *gdb_con = connection->priv;
-
- while (1)
- {
- do
- {
- if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
- return retval;
-
- #ifdef _DEBUG_GDB_IO_
- LOG_DEBUG("character: '%c'", character);
- #endif
-
- switch (character)
- {
- 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 '-':
- LOG_WARNING("negative acknowledgment, but no packet pending");
- break;
- case 0x3:
- gdb_con->ctrl_c = 1;
- *len = 0;
- return ERROR_OK;
- default:
- LOG_WARNING("ignoring character 0x%x", character);
- break;
- }
- } while (character != '$');
-
-
-
- int checksum_ok = 0;
- /* explicit code expansion here to get faster inlined code in -O3 by not
- * calculating checksum
- */
- if (gdb_con->noack_mode)
- {
- if ((retval = fetch_packet(connection, &checksum_ok, 1, len, buffer)) != ERROR_OK)
- return retval;
- } else
- {
- if ((retval = fetch_packet(connection, &checksum_ok, 0, len, buffer)) != ERROR_OK)
- return retval;
- }
-
- if (gdb_con->noack_mode)
- {
- /* checksum is not checked in noack mode */
- break;
- }
- if (checksum_ok)
- {
- if ((retval = gdb_write(connection, "+", 1)) != ERROR_OK)
- {
- return retval;
- }
- break;
- }
- }
- if (gdb_con->closed)
- return ERROR_SERVER_REMOTE_CLOSED;
-
- return ERROR_OK;
- }
-
- int gdb_get_packet(connection_t *connection, char *buffer, int *len)
- {
- gdb_connection_t *gdb_con = connection->priv;
- gdb_con->busy = 1;
- int retval = gdb_get_packet_inner(connection, buffer, len);
- gdb_con->busy = 0;
- return retval;
- }
-
- int gdb_output_con(connection_t *connection, const char* line)
- {
- char *hex_buffer;
- int i, bin_size;
-
- bin_size = strlen(line);
-
- hex_buffer = malloc(bin_size*2 + 2);
- if (hex_buffer == NULL)
- return ERROR_GDB_BUFFER_TOO_SMALL;
-
- hex_buffer[0] = 'O';
- for (i = 0; i < bin_size; i++)
- snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]);
- hex_buffer[bin_size*2 + 1] = 0;
-
- int retval = gdb_put_packet(connection, hex_buffer, bin_size*2 + 1);
-
- free(hex_buffer);
- return retval;
- }
-
- int gdb_output(struct command_context_s *context, const char* line)
- {
- /* this will be dumped to the log and also sent as an O packet if possible */
- LOG_USER_N("%s", line);
- 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 continuing 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)
- {
- int retval;
- connection_t *connection = priv;
-
- target_handle_event(target, event);
- switch (event)
- {
- case TARGET_EVENT_EARLY_HALTED:
- gdb_frontend_halted(target, connection);
- break;
- case TARGET_EVENT_HALTED:
- target_call_event_callbacks(target, TARGET_EVENT_GDB_END);
- break;
- case TARGET_EVENT_GDB_FLASH_ERASE_START:
- target_handle_event(target, TARGET_EVENT_OLD_gdb_program_config);
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- return retval;
- }
- break;
- default:
- break;
- }
-
- return ERROR_OK;
- }
-
- int gdb_new_connection(connection_t *connection)
- {
- gdb_connection_t *gdb_connection = malloc(sizeof(gdb_connection_t));
- 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->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);
-
- /* a gdb session just attached, try to put the target in halt mode.
- *
- * DANGER!!!!
- *
- * If the halt fails(e.g. target needs a reset, JTAG communication not
- * working, etc.), then the GDB connect will succeed as
- * the get_gdb_reg_list() will lie and return a register list with
- * dummy values.
- *
- * This allows GDB monitor commands to be run from a GDB init script to
- * initialize the target
- *
- * Also, since the halt() is asynchronous target connect will be
- * instantaneous and thus avoiding annoying timeout problems during
- * 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 retval;
-
- /* FIX!!!??? would we actually ever receive a + here???
- * Not observed.
- */
- if (initial_ack != '+')
- gdb_putback_char(connection, initial_ack);
- target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_ATTACH);
-
- gdb_actual_connections++;
- LOG_DEBUG("New GDB Connection: %d, Target %s, state: %s",
- gdb_actual_connections,
- gdb_service->target->cmd_name,
- target_state_name(gdb_service->target));
-
- 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;
-
- /* we're done forwarding messages. Tear down callback before
- * cleaning up connection.
- */
- log_remove_callback(gdb_log_callback, connection);
-
- gdb_actual_connections--;
- LOG_DEBUG("GDB Close, Target: %s, state: %s, gdb_actual_connections=%d",
- gdb_service->target->cmd_name,
- target_state_name(gdb_service->target),
- gdb_actual_connections);
-
- /* 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
- {
- LOG_ERROR("BUG: connection->priv == NULL");
- }
-
-
- target_unregister_event_callback(gdb_target_callback_event_handler, connection);
-
- target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_END);
-
- target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_DETACH);
-
- return ERROR_OK;
- }
-
- void gdb_send_error(connection_t *connection, uint8_t 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;
- }
-
- static int gdb_reg_pos(target_t *target, int pos, int len)
- {
- if (target->endianness == TARGET_LITTLE_ENDIAN)
- return pos;
- else
- return len - 1 - pos;
- }
-
- /* Convert register to string of bytes. NB! The # of bits in the
- * register might be non-divisible by 8(a byte), in which
- * case an entire byte is shown.
- *
- * NB! the format on the wire is the target endianess
- *
- * The format of reg->value is little endian
- *
- */
- void gdb_str_to_target(target_t *target, char *tstr, reg_t *reg)
- {
- int i;
-
- uint8_t *buf;
- int buf_len;
- buf = reg->value;
- buf_len = CEIL(reg->size, 8);
-
- for (i = 0; i < buf_len; i++)
- {
- int j = gdb_reg_pos(target, i, buf_len);
- tstr[i*2] = DIGITS[(buf[j]>>4) & 0xf];
- tstr[i*2 + 1] = DIGITS[buf[j]&0xf];
- }
- }
-
- static int hextoint(char c)
- {
- if (c>='0'&&c<='9')
- {
- return c-'0';
- }
- c = toupper(c);
- if (c>='A'&&c<='F')
- {
- return c-'A'+10;
- }
- LOG_ERROR("BUG: invalid register value %08x", c);
- return 0;
- }
-
- /* copy over in register buffer */
- void gdb_target_to_reg(target_t *target, char *tstr, int str_len, uint8_t *bin)
- {
- if (str_len % 2)
- {
- LOG_ERROR("BUG: gdb value with uneven number of characters encountered");
- exit(-1);
- }
-
- int i;
- for (i = 0; i < str_len; i += 2)
- {
- uint8_t t = hextoint(tstr[i]) << 4;
- t |= hextoint(tstr[i + 1]);
-
- int j = gdb_reg_pos(target, i/2, str_len/2);
- bin[j] = t;
- }
- }
-
- int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
- {
- reg_t **reg_list;
- int reg_list_size;
- int retval;
- int reg_packet_size = 0;
- char *reg_packet;
- char *reg_packet_p;
- int i;
-
- #ifdef _DEBUG_GDB_IO_
- LOG_DEBUG("-");
- #endif
-
- if ((retval = target_get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
- {
- return gdb_error(connection, retval);
- }
-
- for (i = 0; i < reg_list_size; i++)
- {
- 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++)
- {
- gdb_str_to_target(target, reg_packet_p, reg_list[i]);
- reg_packet_p += CEIL(reg_list[i]->size, 8) * 2;
- }
-
- #ifdef _DEBUG_GDB_IO_
- {
- char *reg_packet_p;
- reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2);
- LOG_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 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;
-
- #ifdef _DEBUG_GDB_IO_
- LOG_DEBUG("-");
- #endif
-
- /* skip command character */
- packet++;
- packet_size--;
-
- if (packet_size % 2)
- {
- LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- if ((retval = target_get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
- {
- return gdb_error(connection, retval);
- }
-
- packet_p = packet;
- for (i = 0; i < reg_list_size; i++)
- {
- uint8_t *bin_buf;
- int chars = (CEIL(reg_list[i]->size, 8) * 2);
-
- if (packet_p + chars > packet + packet_size)
- {
- LOG_ERROR("BUG: register packet is too small for registers");
- }
-
- reg_arch_type_t *arch_type;
- bin_buf = malloc(CEIL(reg_list[i]->size, 8));
- gdb_target_to_reg(target, packet_p, chars, bin_buf);
-
- /* get register arch_type, and call set method */
- arch_type = register_get_arch_type(reg_list[i]->arch_type);
-
- arch_type->set(reg_list[i], bin_buf);
-
- /* advance packet pointer */
- packet_p += chars;
-
-
- free(bin_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;
- }
-
- int gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
- {
- char *reg_packet;
- int reg_num = strtoul(packet + 1, NULL, 16);
- reg_t **reg_list;
- int reg_list_size;
- int retval;
-
- #ifdef _DEBUG_GDB_IO_
- LOG_DEBUG("-");
- #endif
-
- if ((retval = target_get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
- {
- return gdb_error(connection, retval);
- }
-
- if (reg_list_size <= reg_num)
- {
- LOG_ERROR("gdb requested a non-existing register");
- exit(-1);
- }
-
- reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
-
- 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);
-
- return ERROR_OK;
- }
-
- int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
- {
- char *separator;
- uint8_t *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;
-
- LOG_DEBUG("-");
-
- if ((retval = target_get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
- {
- return gdb_error(connection, retval);
- }
-
- if (reg_list_size < reg_num)
- {
- LOG_ERROR("gdb requested a non-existing register");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- if (*separator != '=')
- {
- LOG_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) */
- bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8));
- int chars = (CEIL(reg_list[reg_num]->size, 8) * 2);
-
- /* fix!!! add some sanity checks on packet size here */
-
- gdb_target_to_reg(target, separator + 1, chars, bin_buf);
-
- /* get register arch_type, and call set method */
- arch_type = register_get_arch_type(reg_list[reg_num]->arch_type);
- arch_type->set(reg_list[reg_num], bin_buf);
-
- gdb_put_packet(connection, "OK", 2);
-
- free(bin_buf);
- free(reg_list);
-
- return ERROR_OK;
- }
-
- int gdb_error(connection_t *connection, int retval)
- {
- switch (retval)
- {
- 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;
- case ERROR_TARGET_NOT_HALTED:
- gdb_send_error(connection, EFAULT);
- break;
- default:
- /* This could be that the target reset itself. */
- LOG_ERROR("unexpected error %i", retval);
- gdb_send_error(connection, EFAULT);
- break;
- }
-
- return ERROR_OK;
- }
-
- /* We don't have to worry about the default 2 second timeout for GDB packets,
- * because GDB breaks up large memory reads into smaller reads.
- *
- * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192?????
- */
- int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
- {
- char *separator;
- uint32_t addr = 0;
- uint32_t len = 0;
-
- uint8_t *buffer;
- char *hex_buffer;
-
- int retval = ERROR_OK;
-
- /* skip command character */
- packet++;
-
- addr = strtoul(packet, &separator, 16);
-
- if (*separator != ',')
- {
- LOG_ERROR("incomplete read memory packet received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- len = strtoul(separator + 1, NULL, 16);
-
- buffer = malloc(len);
-
- LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
-
- retval = target_read_buffer(target, addr, len, buffer);
-
- if ((retval != ERROR_OK)&&!gdb_report_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.
- *
- * OpenOCD developers are acutely aware of this problem, but there is nothing
- * gained by involving the user in this problem that hopefully will get resolved
- * eventually
- *
- * http://sourceware.org/cgi-bin/gnatsweb.pl?cmd = view%20audit-trail&database = gdb&pr = 2395
- *
- * For now, the default is to fix up things to make current GDB versions work.
- * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.
- */
- memset(buffer, 0, len);
- retval = ERROR_OK;
- }
-
- if (retval == ERROR_OK)
- {
- hex_buffer = malloc(len * 2 + 1);
-
- uint32_t i;
- for (i = 0; i < len; i++)
- {
- uint8_t t = buffer[i];
- hex_buffer[2 * i] = DIGITS[(t >> 4) & 0xf];
- hex_buffer[2 * i + 1] = DIGITS[t & 0xf];
- }
-
- gdb_put_packet(connection, hex_buffer, len * 2);
-
- free(hex_buffer);
- }
- else
- {
- retval = gdb_error(connection, retval);
- }
-
- free(buffer);
-
- return retval;
- }
-
- int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
- {
- char *separator;
- uint32_t addr = 0;
- uint32_t len = 0;
-
- uint8_t *buffer;
-
- uint32_t i;
- int retval;
-
- /* skip command character */
- packet++;
-
- addr = strtoul(packet, &separator, 16);
-
- if (*separator != ',')
- {
- LOG_ERROR("incomplete write memory packet received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- len = strtoul(separator + 1, &separator, 16);
-
- if (*(separator++) != ':')
- {
- LOG_ERROR("incomplete write memory packet received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- buffer = malloc(len);
-
- LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
-
- for (i = 0; i < len; i++)
- {
- uint32_t tmp;
- sscanf(separator + 2*i, "%2" SCNx32 , &tmp);
- buffer[i] = tmp;
- }
-
- retval = target_write_buffer(target, addr, len, buffer);
-
- if (retval == ERROR_OK)
- {
- gdb_put_packet(connection, "OK", 2);
- }
- else
- {
- retval = gdb_error(connection, retval);
- }
-
- free(buffer);
-
- return retval;
- }
-
- int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
- {
- char *separator;
- uint32_t addr = 0;
- uint32_t len = 0;
-
- int retval;
-
- /* skip command character */
- packet++;
-
- addr = strtoul(packet, &separator, 16);
-
- if (*separator != ',')
- {
- LOG_ERROR("incomplete write memory binary packet received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- len = strtoul(separator + 1, &separator, 16);
-
- if (*(separator++) != ':')
- {
- LOG_ERROR("incomplete write memory binary packet received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- retval = ERROR_OK;
- if (len)
- {
- LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
-
- retval = target_write_buffer(target, addr, len, (uint8_t*)separator);
- }
-
- if (retval == ERROR_OK)
- {
- gdb_put_packet(connection, "OK", 2);
- }
- else
- {
- if ((retval = gdb_error(connection, retval)) != ERROR_OK)
- return retval;
- }
-
- return ERROR_OK;
- }
-
- int gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
- {
- int current = 0;
- uint32_t address = 0x0;
- int retval = ERROR_OK;
-
- LOG_DEBUG("-");
-
- if (packet_size > 1)
- {
- packet[packet_size] = 0;
- address = strtoul(packet + 1, NULL, 16);
- }
- else
- {
- current = 1;
- }
-
- if (packet[0] == 'c')
- {
- LOG_DEBUG("continue");
- target_handle_event(target, TARGET_EVENT_OLD_pre_resume);
- 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");
- /* step at current or address, don't handle breakpoints */
- retval = target_step(target, current, address, 0);
- }
- return retval;
- }
-
- int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
- {
- int type;
- enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;
- enum watchpoint_rw wp_type;
- uint32_t address;
- uint32_t size;
- char *separator;
- int retval;
-
- LOG_DEBUG("-");
-
- type = strtoul(packet + 1, &separator, 16);
-
- if (type == 0) /* memory breakpoint */
- bp_type = BKPT_SOFT;
- else if (type == 1) /* hardware breakpoint */
- bp_type = BKPT_HARD;
- else if (type == 2) /* write watchpoint */
- wp_type = WPT_WRITE;
- else if (type == 3) /* read watchpoint */
- 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 != ',')
- {
- LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- address = strtoul(separator + 1, &separator, 16);
-
- if (*separator != ',')
- {
- LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- size = strtoul(separator + 1, &separator, 16);
-
- switch (type)
- {
- case 0:
- case 1:
- if (packet[0] == 'Z')
- {
- if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)
- {
- if ((retval = gdb_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);
- }
- break;
- case 2:
- case 3:
- case 4:
- {
- if (packet[0] == 'Z')
- {
- if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK)
- {
- if ((retval = gdb_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);
- }
- break;
- }
- default:
- break;
- }
-
- return ERROR_OK;
- }
-
- /* 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, ...)
- {
- 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)
- {
- uint32_t i;
- uint32_t block_size = 0xffffffff;
-
- /* loop through all sectors and return smallest sector size */
-
- for (i = 0; i < (uint32_t)bank->num_sectors; i++)
- {
- if (bank->sectors[i].size < block_size)
- block_size = bank->sectors[i].size;
- }
-
- return block_size;
- }
-
- static int compare_bank (const void * a, const void * b)
- {
- flash_bank_t *b1, *b2;
- b1=*((flash_bank_t **)a);
- b2=*((flash_bank_t **)b);
-
- if (b1->base == b2->base)
- {
- return 0;
- } else if (b1->base > b2->base)
- {
- return 1;
- } else
- {
- return -1;
- }
- }
-
- 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)
- {
- char *cmd;
- int i;
- cmd = malloc((packet_size - 6)/2 + 1);
- for (i = 0; i < (packet_size - 6)/2; i++)
- {
- uint32_t tmp;
- sscanf(packet + 6 + 2*i, "%2" SCNx32 , &tmp);
- cmd[i] = tmp;
- }
- cmd[(packet_size - 6)/2] = 0x0;
-
- /* We want to print all debug output to GDB connection */
- log_add_callback(gdb_log_callback, connection);
- target_call_timer_callbacks_now();
- command_run_line(cmd_ctx, cmd);
- target_call_timer_callbacks_now();
- log_remove_callback(gdb_log_callback, connection);
- free(cmd);
- }
- gdb_put_packet(connection, "OK", 2);
- return ERROR_OK;
- }
- else if (strstr(packet, "qCRC:"))
- {
- if (packet_size > 5)
- {
- int retval;
- char gdb_reply[10];
- char *separator;
- uint32_t checksum;
- uint32_t addr = 0;
- uint32_t len = 0;
-
- /* skip command character */
- packet += 5;
-
- addr = strtoul(packet, &separator, 16);
-
- if (*separator != ',')
- {
- LOG_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%8.8" PRIx32 "", checksum);
- gdb_put_packet(connection, gdb_reply, 9);
- }
- else
- {
- if ((retval = gdb_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-;QStartNoAckMode+",
- (GDB_BUFFER_SIZE - 1), ((gdb_use_memory_map == 1) && (flash_get_bank_count() > 0)) ? '+' : '-');
-
- 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::") && (flash_get_bank_count() > 0))
- {
- /* 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");
-
- /*
- sort banks in ascending order, we need to make non-flash memory be ram(or rather
- read/write) by default for GDB.
- GDB does not have a concept of non-cacheable read/write memory.
- */
- flash_bank_t **banks = malloc(sizeof(flash_bank_t *)*flash_get_bank_count());
- int i;
-
- for (i = 0; i < flash_get_bank_count(); i++)
- {
- p = get_flash_bank_by_num(i);
- if (p == NULL)
- {
- free(banks);
- retval = ERROR_FAIL;
- gdb_send_error(connection, retval);
- return retval;
- }
- banks[i]=p;
- }
-
- qsort(banks, flash_get_bank_count(), sizeof(flash_bank_t *), compare_bank);
-
- uint32_t ram_start = 0;
- for (i = 0; i < flash_get_bank_count(); i++)
- {
- p = banks[i];
-
- if (ram_start < p->base)
- {
- xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
- ram_start, p->base-ram_start);
- }
-
- /* 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);
- ram_start = p->base + p->size;
- }
- if (ram_start != 0)
- {
- xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
- ram_start, 0-ram_start);
- } else
- {
- /* a flash chip could be at the very end of the 32 bit address space, in which case
- ram_start will be precisely 0 */
- }
-
- free(banks);
- banks = NULL;
-
- 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;
- unsigned 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));
-
- 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;
- }
-
- 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')
- {
- LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- addr = strtoul(parse, &parse, 16);
-
- if (*(parse++) != ',' || *parse == '\0')
- {
- LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- length = strtoul(parse, &parse, 16);
-
- if (*parse != '\0')
- {
- LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
-
- /* 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_FLASH_ERASE_START);
- result = flash_erase_address_range(gdb_service->target, addr, length);
- target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_END);
-
- /* perform erase */
- if (result != 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);
- LOG_ERROR("flash_erase returned %i", result);
- }
- else
- gdb_put_packet(connection, "OK", 2);
-
- return ERROR_OK;
- }
-
- if (strstr(packet, "vFlashWrite:"))
- {
- int retval;
- unsigned long addr;
- unsigned long length;
- char *parse = packet + 12;
-
- if (*parse == '\0')
- {
- LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- }
- addr = strtoul(parse, &parse, 16);
- if (*(parse++) != ':')
- {
- LOG_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 */
- if ((retval = image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (uint8_t*)parse)) != ERROR_OK)
- {
- return retval;
- }
-
- gdb_put_packet(connection, "OK", 2);
-
- return ERROR_OK;
- }
-
- if (!strcmp(packet, "vFlashDone"))
- {
- uint32_t written;
-
- /* process the flashing buffer. No need to erase as GDB
- * always issues a vFlashErase first. */
- target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_START);
- result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0);
- target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_END);
- if (result != ERROR_OK)
- {
- if (result == ERROR_FLASH_DST_OUT_OF_BANK)
- gdb_put_packet(connection, "E.memtype", 9);
- else
- gdb_send_error(connection, EIO);
- }
- else
- {
- LOG_DEBUG("wrote %u bytes from vFlash image to flash", (unsigned)written);
- gdb_put_packet(connection, "OK", 2);
- }
-
- 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_detach(connection_t *connection, target_t *target)
- {
-
- switch (detach_mode)
- {
- case GDB_DETACH_RESUME:
- target_handle_event(target, TARGET_EVENT_OLD_pre_resume);
- target_resume(target, 1, 0, 1, 0);
- break;
-
- case GDB_DETACH_RESET:
- /* FIX?? make this configurable?? */
- target_process_reset(connection->cmd_ctx, RESET_HALT);
- break;
-
- case GDB_DETACH_HALT:
- target_halt(target);
- break;
-
- case GDB_DETACH_NOTHING:
- break;
- }
-
- gdb_put_packet(connection, "OK", 2);
- return ERROR_OK;
- }
-
- static void gdb_log_callback(void *priv, const char *file, int line,
- const char *function, const char *string)
- {
- connection_t *connection = priv;
- gdb_connection_t *gdb_con = connection->priv;
-
- if (gdb_con->busy)
- {
- /* do not reply this using the O packet */
- return;
- }
-
- gdb_output_con(connection, string);
- }
-
- /* 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;
- target_t *target = gdb_service->target;
- char *packet = gdb_packet_buffer;
- int packet_size;
- int retval;
- gdb_connection_t *gdb_con = connection->priv;
- static int extended_protocol = 0;
-
- /* drain input buffer */
- do
- {
- packet_size = GDB_BUFFER_SIZE-1;
- if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK)
- {
- return retval;
- }
-
- /* terminate with zero */
- packet[packet_size] = 0;
-
- if (LOG_LEVEL_IS(LOG_LVL_DEBUG)) {
- if (packet[0] == 'X') {
- // binary packets spew junk into the debug log stream
- char buf[ 50 ];
- int x;
- for (x = 0 ; (x < 49) && (packet[x] != ':') ; x++) {
- buf[x] = packet[x];
- }
- buf[x] = 0;
- LOG_DEBUG("received packet: '%s:<binary-data>'", buf);
- } else {
- LOG_DEBUG("received 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 */
- gdb_put_packet(connection, NULL, 0);
- break;
- case 'q':
- case 'Q':
- retval = gdb_query_packet(connection, target, packet, packet_size);
- break;
- case 'g':
- retval = gdb_get_registers_packet(connection, target, packet, packet_size);
- break;
- case 'G':
- retval = gdb_set_registers_packet(connection, target, packet, packet_size);
- break;
- case 'p':
- retval = gdb_get_register_packet(connection, target, packet, packet_size);
- break;
- case 'P':
- retval = gdb_set_register_packet(connection, target, packet, packet_size);
- break;
- case 'm':
- retval = gdb_read_memory_packet(connection, target, packet, packet_size);
- break;
- case 'M':
- retval = gdb_write_memory_packet(connection, target, packet, packet_size);
- break;
- case 'z':
- case 'Z':
- retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);
- break;
- case '?':
- gdb_last_signal_packet(connection, target, packet, packet_size);
- break;
- case 'c':
- case 's':
- {
- if (target->state != TARGET_HALTED)
- {
- /* If the target isn't in the halted state, then we can't
- * step/continue. This might be early setup, etc.
- */
- gdb_sig_halted(connection);
- } else
- {
- /* We're running/stepping, in which case we can
- * forward log output until the target is halted
- */
- gdb_connection_t *gdb_con = connection->priv;
- gdb_con->frontend_state = TARGET_RUNNING;
- log_add_callback(gdb_log_callback, connection);
- target_call_event_callbacks(target, TARGET_EVENT_GDB_START);
- 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;
- case 'v':
- retval = gdb_v_packet(connection, target, packet, packet_size);
- break;
- case 'D':
- 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 */
- breakpoint_clear_target(gdb_service->target);
- watchpoint_clear_target(gdb_service->target);
- command_run_linef(connection->cmd_ctx,
- "ocd_gdb_restart %s",
- target->cmd_name);
- break;
- default:
- /* ignore unkown packets */
- LOG_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)
- {
- target_halt(target);
- gdb_con->ctrl_c = 0;
- }
- }
-
- } while (gdb_con->buf_cnt > 0);
-
- return ERROR_OK;
- }
-
- int gdb_input(connection_t *connection)
- {
- int retval = gdb_input_inner(connection);
- gdb_connection_t *gdb_con = connection->priv;
- if (retval == ERROR_SERVER_REMOTE_CLOSED)
- return retval;
-
- /* logging does not propagate the error, yet can set the gdb_con->closed flag */
- if (gdb_con->closed)
- return ERROR_SERVER_REMOTE_CLOSED;
-
- /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */
- return ERROR_OK;
- }
-
- int gdb_init(void)
- {
- gdb_service_t *gdb_service;
- target_t *target = all_targets;
-
- if (!target)
- {
- LOG_WARNING("no gdb ports allocated as no target has been specified");
- return ERROR_OK;
- }
-
- if (gdb_port == 0 && server_use_pipes == 0)
- {
- LOG_INFO("gdb port disabled");
- return ERROR_OK;
- }
-
- if (server_use_pipes)
- {
- /* only a single gdb connection when using a pipe */
-
- gdb_service = malloc(sizeof(gdb_service_t));
- gdb_service->target = target;
-
- add_service("gdb", CONNECTION_PIPE, 0, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
-
- LOG_DEBUG("gdb service for target %s using pipes",
- target_get_name(target));
- }
- else
- {
- unsigned short port = gdb_port;
-
- while (target)
- {
- gdb_service = malloc(sizeof(gdb_service_t));
- gdb_service->target = target;
-
- add_service("gdb", CONNECTION_TCP,
- port, 1,
- gdb_new_connection, gdb_input,
- gdb_connection_closed, gdb_service);
-
- LOG_DEBUG("gdb service for target %s at TCP port %i",
- target_get_name(target),
- port);
- target = target->next;
- port++;
- }
- }
-
- return ERROR_OK;
- }
-
- /* daemon configuration command gdb_port */
- int handle_gdb_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
- {
- if (argc == 0)
- {
- command_print(cmd_ctx, "%d", gdb_port);
- return ERROR_OK;
- }
-
- gdb_port = strtoul(args[0], NULL, 0);
-
- 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;
- }
- else
- LOG_WARNING("invalid gdb_detach configuration directive: %s", args[0]);
- }
-
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- 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;
- }
- else
- LOG_WARNING("invalid gdb_memory_map configuration directive %s", args[0]);
- }
-
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- 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;
- }
- else
- LOG_WARNING("invalid gdb_flash_program configuration directive: %s", args[0]);
- }
-
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- int handle_gdb_report_data_abort_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
- {
- if (argc == 1)
- {
- if (strcmp(args[0], "enable") == 0)
- {
- gdb_report_data_abort = 1;
- return ERROR_OK;
- }
- else if (strcmp(args[0], "disable") == 0)
- {
- gdb_report_data_abort = 0;
- return ERROR_OK;
- }
- else
- LOG_WARNING("invalid gdb_report_data_abort configuration directive: %s", args[0]);
- }
-
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- /* gdb_breakpoint_override */
- 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_ANY, "daemon configuration command gdb_port");
- register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command,
- COMMAND_CONFIG, "resume/reset/halt/nothing - "
- "specify behavior when GDB detaches from the target");
- register_command(command_context, NULL, "gdb_memory_map", handle_gdb_memory_map_command,
- COMMAND_CONFIG, "enable or disable memory map");
- register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command,
- COMMAND_CONFIG, "enable or disable flash program");
- register_command(command_context, NULL, "gdb_report_data_abort", handle_gdb_report_data_abort_command,
- COMMAND_CONFIG, "enable or disable reporting data aborts");
- register_command(command_context, NULL, "gdb_breakpoint_override", handle_gdb_breakpoint_override_command,
- COMMAND_EXEC, "hard/soft/disable - force breakpoint type for gdb 'break' commands.");
- return ERROR_OK;
- }
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