-/***************************************************************************\r
- * Copyright (C) 2005 by Dominic Rath *\r
- * Dominic.Rath@gmx.de *\r
- * *\r
- * This program is free software; you can redistribute it and/or modify *\r
- * it under the terms of the GNU General Public License as published by *\r
- * the Free Software Foundation; either version 2 of the License, or *\r
- * (at your option) any later version. *\r
- * *\r
- * This program is distributed in the hope that it will be useful, *\r
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *\r
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *\r
- * GNU General Public License for more details. *\r
- * *\r
- * You should have received a copy of the GNU General Public License *\r
- * along with this program; if not, write to the *\r
- * Free Software Foundation, Inc., *\r
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *\r
- ***************************************************************************/\r
-#ifdef HAVE_CONFIG_H\r
-#include "config.h"\r
-#endif\r
-\r
-#include "replacements.h"\r
-\r
-#include "gdb_server.h"\r
-\r
-#include "server.h"\r
-#include "log.h"\r
-#include "binarybuffer.h"\r
-#include "jtag.h"\r
-#include "breakpoints.h"\r
-#include "flash.h"\r
-#include "target_request.h"\r
-#include "configuration.h"\r
-\r
-#include <string.h>\r
-#include <errno.h>\r
-#include <unistd.h>\r
-#include <stdlib.h>\r
-\r
-#if 0\r
-#define _DEBUG_GDB_IO_\r
-#endif\r
-\r
-static unsigned short gdb_port;\r
-static const char *DIGITS = "0123456789abcdef";\r
-\r
-static void gdb_log_callback(void *priv, const char *file, int line, \r
- const char *function, const char *format, va_list args);\r
-\r
-enum gdb_detach_mode\r
-{\r
- GDB_DETACH_RESUME,\r
- GDB_DETACH_RESET,\r
- GDB_DETACH_HALT,\r
- GDB_DETACH_NOTHING\r
-};\r
-\r
-/* target behaviour on gdb detach */\r
-enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME;\r
-\r
-/* set if we are sending a memory map to gdb\r
- * via qXfer:memory-map:read packet */\r
-int gdb_use_memory_map = 0;\r
-int gdb_flash_program = 0;\r
-\r
-/* if set, data aborts cause an error to be reported in memory read packets\r
- * see the code in gdb_read_memory_packet() for further explanations */\r
-int gdb_report_data_abort = 0;\r
-\r
-int gdb_last_signal(target_t *target)\r
-{\r
- switch (target->debug_reason)\r
- {\r
- case DBG_REASON_DBGRQ:\r
- return 0x2; /* SIGINT */\r
- case DBG_REASON_BREAKPOINT:\r
- case DBG_REASON_WATCHPOINT:\r
- case DBG_REASON_WPTANDBKPT:\r
- return 0x05; /* SIGTRAP */\r
- case DBG_REASON_SINGLESTEP:\r
- return 0x05; /* SIGTRAP */\r
- case DBG_REASON_NOTHALTED:\r
- return 0x0; /* no signal... shouldn't happen */\r
- default:\r
- ERROR("BUG: undefined debug reason");\r
- exit(-1);\r
- }\r
-}\r
-\r
-int gdb_get_char(connection_t *connection, int* next_char)\r
-{\r
- gdb_connection_t *gdb_con = connection->priv;\r
-\r
-#ifdef _DEBUG_GDB_IO_\r
- char *debug_buffer;\r
-#endif\r
-\r
- if (gdb_con->buf_cnt-- > 0)\r
- {\r
- *next_char = *(gdb_con->buf_p++);\r
- if (gdb_con->buf_cnt > 0)\r
- connection->input_pending = 1;\r
- else\r
- connection->input_pending = 0;\r
-\r
-#ifdef _DEBUG_GDB_IO_\r
- DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);\r
-#endif\r
-\r
- return ERROR_OK;\r
- }\r
-\r
- for (;;)\r
- {\r
-#ifndef _WIN32\r
- /* a non-blocking socket will block if there is 0 bytes available on the socket,\r
- * but return with as many bytes as are available immediately\r
- */\r
- struct timeval tv;\r
- fd_set read_fds;\r
- \r
- FD_ZERO(&read_fds);\r
- FD_SET(connection->fd, &read_fds);\r
- \r
- tv.tv_sec = 1;\r
- tv.tv_usec = 0;\r
- if (select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0)\r
- {\r
- /* This can typically be because a "monitor" command took too long\r
- * before printing any progress messages\r
- */\r
- return ERROR_GDB_TIMEOUT; \r
- }\r
-#endif\r
- gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);\r
- if (gdb_con->buf_cnt > 0)\r
- {\r
- break;\r
- }\r
- if (gdb_con->buf_cnt == 0)\r
- {\r
- gdb_con->closed = 1;\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
-#ifdef _WIN32\r
- errno = WSAGetLastError();\r
-\r
- switch(errno)\r
- {\r
- case WSAEWOULDBLOCK:\r
- usleep(1000);\r
- break;\r
- case WSAECONNABORTED:\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- case WSAECONNRESET:\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- default:\r
- ERROR("read: %d", errno);\r
- exit(-1);\r
- }\r
-#else\r
- switch(errno)\r
- {\r
- case EAGAIN:\r
- usleep(1000);\r
- break;\r
- case ECONNABORTED:\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- case ECONNRESET:\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- default:\r
- ERROR("read: %s", strerror(errno));\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-#endif\r
- }\r
-\r
-#ifdef _DEBUG_GDB_IO_\r
- debug_buffer = malloc(gdb_con->buf_cnt + 1);\r
- memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt);\r
- debug_buffer[gdb_con->buf_cnt] = 0;\r
- DEBUG("received '%s'", debug_buffer);\r
- free(debug_buffer);\r
-#endif\r
-\r
- gdb_con->buf_p = gdb_con->buffer;\r
- gdb_con->buf_cnt--;\r
- *next_char = *(gdb_con->buf_p++);\r
- if (gdb_con->buf_cnt > 0)\r
- connection->input_pending = 1;\r
- else\r
- connection->input_pending = 0; \r
-#ifdef _DEBUG_GDB_IO_\r
- DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);\r
-#endif\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_putback_char(connection_t *connection, int last_char)\r
-{\r
- gdb_connection_t *gdb_con = connection->priv;\r
-\r
- if (gdb_con->buf_p > gdb_con->buffer)\r
- {\r
- *(--gdb_con->buf_p) = last_char;\r
- gdb_con->buf_cnt++;\r
- }\r
- else\r
- {\r
- ERROR("BUG: couldn't put character back"); \r
- }\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-/* The only way we can detect that the socket is closed is the first time\r
- * we write to it, we will fail. Subsequent write operations will\r
- * succeed. Shudder! */\r
-int gdb_write(connection_t *connection, void *data, int len)\r
-{\r
- gdb_connection_t *gdb_con = connection->priv;\r
- if (gdb_con->closed)\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
-\r
- if (write_socket(connection->fd, data, len) == len)\r
- {\r
- return ERROR_OK;\r
- }\r
- gdb_con->closed = 1;\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
-}\r
-\r
-int gdb_put_packet_inner(connection_t *connection, char *buffer, int len)\r
-{\r
- int i;\r
- unsigned char my_checksum = 0;\r
-#ifdef _DEBUG_GDB_IO_\r
- char *debug_buffer;\r
-#endif\r
- int reply;\r
- int retval;\r
- gdb_connection_t *gdb_con = connection->priv;\r
-\r
- for (i = 0; i < len; i++)\r
- my_checksum += buffer[i];\r
-\r
- while (1)\r
- {\r
-#ifdef _DEBUG_GDB_IO_\r
- debug_buffer = malloc(len + 1);\r
- memcpy(debug_buffer, buffer, len);\r
- debug_buffer[len] = 0;\r
- DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);\r
- free(debug_buffer);\r
-#endif\r
-#if 0\r
- char checksum[3];\r
- gdb_write(connection, "$", 1);\r
- if (len > 0)\r
- gdb_write(connection, buffer, len);\r
- gdb_write(connection, "#", 1);\r
- \r
- snprintf(checksum, 3, "%2.2x", my_checksum);\r
- \r
- gdb_write(connection, checksum, 2);\r
-#else\r
- void *allocated = NULL;\r
- char stackAlloc[1024];\r
- char *t = stackAlloc;\r
- int totalLen = 1 + len + 1 + 2;\r
- if (totalLen > sizeof(stackAlloc))\r
- {\r
- allocated = malloc(totalLen);\r
- t = allocated;\r
- if (allocated == NULL)\r
- {\r
- ERROR("Ran out of memory trying to reply packet %d\n", totalLen);\r
- exit(-1);\r
- }\r
- }\r
- t[0] = '$';\r
- memcpy(t + 1, buffer, len);\r
- t[1 + len] = '#';\r
- t[1 + len + 1] = DIGITS[(my_checksum >> 4) & 0xf];\r
- t[1 + len + 2] = DIGITS[my_checksum & 0xf];\r
- \r
- gdb_write(connection, t, totalLen);\r
- \r
- if (allocated)\r
- {\r
- free(allocated);\r
- }\r
-#endif\r
- if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)\r
- return retval;\r
-\r
- if (reply == '+')\r
- break;\r
- else if (reply == '-')\r
- {\r
- /* Stop sending output packets for now */\r
- log_setCallback(NULL, NULL);\r
- WARNING("negative reply, retrying");\r
- }\r
- else if (reply == 0x3)\r
- {\r
- gdb_con->ctrl_c = 1;\r
- if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)\r
- return retval;\r
- if (reply == '+')\r
- break;\r
- else if (reply == '-')\r
- {\r
- /* Stop sending output packets for now */\r
- log_setCallback(NULL, NULL);\r
- WARNING("negative reply, retrying");\r
- }\r
- else\r
- {\r
- ERROR("unknown character 0x%2.2x in reply, dropping connection", reply);\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
- }\r
- else\r
- {\r
- ERROR("unknown character 0x%2.2x in reply, dropping connection", reply);\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
- }\r
- if (gdb_con->closed)\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_put_packet(connection_t *connection, char *buffer, int len)\r
-{\r
- gdb_connection_t *gdb_con = connection->priv;\r
- gdb_con->busy = 1;\r
- int retval = gdb_put_packet_inner(connection, buffer, len);\r
- gdb_con->busy = 0;\r
- return retval;\r
-}\r
-\r
-int gdb_get_packet_inner(connection_t *connection, char *buffer, int *len)\r
-{\r
- int character;\r
- int count = 0;\r
- int retval;\r
- char checksum[3];\r
- unsigned char my_checksum = 0;\r
- gdb_connection_t *gdb_con = connection->priv;\r
-\r
- while (1)\r
- {\r
- do\r
- {\r
- if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)\r
- return retval;\r
-\r
-#ifdef _DEBUG_GDB_IO_\r
- DEBUG("character: '%c'", character);\r
-#endif\r
-\r
- switch (character)\r
- {\r
- case '$':\r
- break;\r
- case '+':\r
- WARNING("acknowledgment received, but no packet pending");\r
- break;\r
- case '-':\r
- WARNING("negative acknowledgment, but no packet pending");\r
- break;\r
- case 0x3:\r
- gdb_con->ctrl_c = 1;\r
- *len = 0;\r
- return ERROR_OK;\r
- default:\r
- WARNING("ignoring character 0x%x", character);\r
- break;\r
- }\r
- } while (character != '$');\r
-\r
- my_checksum = 0;\r
- \r
- count = 0;\r
- gdb_connection_t *gdb_con = connection->priv;\r
- for (;;)\r
- {\r
- /* The common case is that we have an entire packet with no escape chars.\r
- * We need to leave at least 2 bytes in the buffer to have\r
- * gdb_get_char() update various bits and bobs correctly. \r
- */\r
- if ((gdb_con->buf_cnt > 2) && ((gdb_con->buf_cnt+count) < *len))\r
- {\r
- /* The compiler will struggle a bit with constant propagation and\r
- * aliasing, so we help it by showing that these values do not\r
- * change inside the loop \r
- */ \r
- int i;\r
- char *buf = gdb_con->buf_p;\r
- int run = gdb_con->buf_cnt - 2;\r
- i = 0;\r
- int done = 0;\r
- while (i < run)\r
- {\r
- character = *buf++;\r
- i++;\r
- if (character == '#')\r
- {\r
- /* Danger! character can be '#' when esc is \r
- * used so we need an explicit boolean for done here.\r
- */\r
- done = 1;\r
- break;\r
- }\r
- \r
- if (character == '}')\r
- {\r
- /* data transmitted in binary mode (X packet)\r
- * uses 0x7d as escape character */\r
- my_checksum += character & 0xff;\r
- character = *buf++;\r
- i++;\r
- my_checksum += character & 0xff;\r
- buffer[count++] = (character ^ 0x20) & 0xff;\r
- } else\r
- {\r
- my_checksum += character & 0xff;\r
- buffer[count++] = character & 0xff;\r
- }\r
- }\r
- gdb_con->buf_p += i;\r
- gdb_con->buf_cnt -= i;\r
- if (done) \r
- break;\r
- } \r
- if (count > *len)\r
- {\r
- ERROR("packet buffer too small");\r
- return ERROR_GDB_BUFFER_TOO_SMALL;\r
- }\r
- \r
- if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)\r
- return retval;\r
-\r
- if (character == '#')\r
- break;\r
-\r
- if (character == '}')\r
- {\r
- /* data transmitted in binary mode (X packet)\r
- * uses 0x7d as escape character */\r
- my_checksum += character & 0xff;\r
- if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)\r
- return retval;\r
- my_checksum += character & 0xff;\r
- buffer[count++] = (character ^ 0x20) & 0xff;\r
- }\r
- else\r
- {\r
- my_checksum += character & 0xff;\r
- buffer[count++] = character & 0xff;\r
- }\r
-\r
- }\r
-\r
- *len = count;\r
-\r
- if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)\r
- return retval;\r
- checksum[0] = character;\r
- if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)\r
- return retval;\r
- checksum[1] = character;\r
- checksum[2] = 0;\r
-\r
- if (my_checksum == strtoul(checksum, NULL, 16))\r
- {\r
- gdb_write(connection, "+", 1);\r
- break;\r
- }\r
-\r
- WARNING("checksum error, requesting retransmission");\r
- gdb_write(connection, "-", 1);\r
- }\r
- if (gdb_con->closed)\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_get_packet(connection_t *connection, char *buffer, int *len)\r
-{\r
- gdb_connection_t *gdb_con = connection->priv;\r
- gdb_con->busy = 1;\r
- int retval = gdb_get_packet_inner(connection, buffer, len);\r
- gdb_con->busy = 0;\r
- return retval;\r
-}\r
- \r
-int gdb_output_con(connection_t *connection, char* line)\r
-{\r
- char *hex_buffer;\r
- int i, bin_size;\r
-\r
- bin_size = strlen(line);\r
-\r
- hex_buffer = malloc(bin_size*2 + 4);\r
-\r
- hex_buffer[0] = 'O';\r
- for (i=0; i<bin_size; i++)\r
- snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]);\r
- hex_buffer[bin_size*2+1] = '0';\r
- hex_buffer[bin_size*2+2] = 'a';\r
- hex_buffer[bin_size*2+3] = 0x0;\r
-\r
- gdb_put_packet(connection, hex_buffer, bin_size*2 + 3);\r
-\r
- free(hex_buffer);\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_output(struct command_context_s *context, char* line)\r
-{\r
- /* this will be dumped to the log and also sent as an O packet if possible */\r
- USER(line); \r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_program_handler(struct target_s *target, enum target_event event, void *priv)\r
-{\r
- FILE *script;\r
- struct command_context_s *cmd_ctx = priv;\r
- \r
- if (target->gdb_program_script)\r
- {\r
- script = open_file_from_path(cmd_ctx, target->gdb_program_script, "r");\r
- if (!script)\r
- {\r
- ERROR("couldn't open script file %s", target->gdb_program_script);\r
- return ERROR_OK;\r
- }\r
-\r
- INFO("executing gdb_program script '%s'", target->gdb_program_script);\r
- command_run_file(cmd_ctx, script, COMMAND_EXEC);\r
- fclose(script);\r
- \r
- jtag_execute_queue();\r
- }\r
- \r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv)\r
-{\r
- connection_t *connection = priv;\r
- gdb_connection_t *gdb_connection = connection->priv;\r
- char sig_reply[4];\r
- int signal;\r
-\r
- switch (event)\r
- {\r
- case TARGET_EVENT_HALTED:\r
- /* In the GDB protocol when we are stepping or coninuing execution,\r
- * we have a lingering reply. Upon receiving a halted event \r
- * when we have that lingering packet, we reply to the original\r
- * step or continue packet.\r
- * \r
- * Executing monitor commands can bring the target in and\r
- * out of the running state so we'll see lots of TARGET_EVENT_XXX\r
- * that are to be ignored.\r
- */\r
- if (gdb_connection->frontend_state == TARGET_RUNNING)\r
- {\r
- /* stop forwarding log packets! */\r
- log_setCallback(NULL, NULL);\r
- \r
- if (gdb_connection->ctrl_c)\r
- {\r
- signal = 0x2;\r
- gdb_connection->ctrl_c = 0;\r
- }\r
- else\r
- {\r
- signal = gdb_last_signal(target);\r
- }\r
-\r
- snprintf(sig_reply, 4, "T%2.2x", signal);\r
- gdb_put_packet(connection, sig_reply, 3);\r
- gdb_connection->frontend_state = TARGET_HALTED;\r
- }\r
- break;\r
- case TARGET_EVENT_GDB_PROGRAM:\r
- gdb_program_handler(target, event, connection->cmd_ctx);\r
- break;\r
- default:\r
- break;\r
- }\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_new_connection(connection_t *connection)\r
-{\r
- gdb_connection_t *gdb_connection = malloc(sizeof(gdb_connection_t));\r
- gdb_service_t *gdb_service = connection->service->priv;\r
- int retval;\r
- int initial_ack;\r
-\r
- connection->priv = gdb_connection;\r
-\r
- /* initialize gdb connection information */\r
- gdb_connection->buf_p = gdb_connection->buffer;\r
- gdb_connection->buf_cnt = 0;\r
- gdb_connection->ctrl_c = 0;\r
- gdb_connection->frontend_state = TARGET_HALTED;\r
- gdb_connection->vflash_image = NULL;\r
- gdb_connection->closed = 0;\r
- gdb_connection->busy = 0;\r
- \r
- /* output goes through gdb connection */\r
- command_set_output_handler(connection->cmd_ctx, gdb_output, connection);\r
-\r
- /* register callback to be informed about target events */\r
- target_register_event_callback(gdb_target_callback_event_handler, connection); \r
-\r
- /* a gdb session just attached, put the target in halt mode */\r
- if (((retval = gdb_service->target->type->halt(gdb_service->target)) != ERROR_OK) &&\r
- (retval != ERROR_TARGET_ALREADY_HALTED))\r
- {\r
- ERROR("error(%d) when trying to halt target, falling back to \"reset halt\"", retval);\r
- command_run_line(connection->cmd_ctx, "reset halt");\r
- }\r
-\r
- /* This will time out after 1 second */\r
- command_run_line(connection->cmd_ctx, "wait_halt 1");\r
-\r
- /* remove the initial ACK from the incoming buffer */\r
- if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK)\r
- return retval;\r
-\r
- if (initial_ack != '+')\r
- gdb_putback_char(connection, initial_ack);\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_connection_closed(connection_t *connection)\r
-{\r
- gdb_service_t *gdb_service = connection->service->priv;\r
- gdb_connection_t *gdb_connection = connection->priv;\r
-\r
- /* see if an image built with vFlash commands is left */\r
- if (gdb_connection->vflash_image)\r
- {\r
- image_close(gdb_connection->vflash_image);\r
- free(gdb_connection->vflash_image);\r
- gdb_connection->vflash_image = NULL;\r
- }\r
-\r
- /* if this connection registered a debug-message receiver delete it */\r
- delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target);\r
- \r
- if (connection->priv)\r
- {\r
- free(connection->priv);\r
- connection->priv = NULL;\r
- }\r
- else\r
- {\r
- ERROR("BUG: connection->priv == NULL");\r
- }\r
-\r
- target_unregister_event_callback(gdb_target_callback_event_handler, connection);\r
- log_setCallback(NULL, NULL);\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-void gdb_send_error(connection_t *connection, u8 the_error)\r
-{\r
- char err[4];\r
- snprintf(err, 4, "E%2.2X", the_error );\r
- gdb_put_packet(connection, err, 3);\r
-}\r
-\r
-int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size)\r
-{\r
- char sig_reply[4];\r
- int signal;\r
-\r
- signal = gdb_last_signal(target);\r
-\r
- snprintf(sig_reply, 4, "S%2.2x", signal);\r
- gdb_put_packet(connection, sig_reply, 3);\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-/* Convert register to string of bits. NB! The # of bits in the\r
- * register might be non-divisible by 8(a byte), in which\r
- * case an entire byte is shown. */\r
-void gdb_str_to_target(target_t *target, char *tstr, reg_t *reg)\r
-{\r
- int i;\r
-\r
- u8 *buf;\r
- int buf_len;\r
- buf = reg->value;\r
- buf_len = CEIL(reg->size, 8); \r
-\r
- if (target->endianness == TARGET_LITTLE_ENDIAN)\r
- {\r
- for (i = 0; i < buf_len; i++)\r
- {\r
- tstr[i*2] = DIGITS[(buf[i]>>4) & 0xf];\r
- tstr[i*2+1] = DIGITS[buf[i]&0xf];\r
- }\r
- }\r
- else\r
- {\r
- for (i = 0; i < buf_len; i++)\r
- {\r
- tstr[(buf_len-1-i)*2] = DIGITS[(buf[i]>>4)&0xf];\r
- tstr[(buf_len-1-i)*2+1] = DIGITS[buf[i]&0xf];\r
- }\r
- } \r
-}\r
-\r
-void gdb_target_to_str(target_t *target, char *tstr, char *str)\r
-{\r
- int str_len = strlen(tstr);\r
- int i;\r
-\r
- if (str_len % 2)\r
- {\r
- ERROR("BUG: gdb value with uneven number of characters encountered");\r
- exit(-1);\r
- }\r
-\r
- if (target->endianness == TARGET_LITTLE_ENDIAN)\r
- {\r
- for (i = 0; i < str_len; i+=2)\r
- {\r
- str[str_len - i - 1] = tstr[i + 1];\r
- str[str_len - i - 2] = tstr[i];\r
- }\r
- }\r
- else\r
- {\r
- for (i = 0; i < str_len; i++)\r
- {\r
- str[i] = tstr[i];\r
- }\r
- } \r
-}\r
-\r
-int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)\r
-{\r
- reg_t **reg_list;\r
- int reg_list_size;\r
- int retval;\r
- int reg_packet_size = 0;\r
- char *reg_packet;\r
- char *reg_packet_p;\r
- int i;\r
-\r
-#ifdef _DEBUG_GDB_IO_\r
- DEBUG("-");\r
-#endif\r
-\r
- if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)\r
- {\r
- switch (retval)\r
- {\r
- case ERROR_TARGET_NOT_HALTED:\r
- ERROR("gdb requested registers but we're not halted, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- default:\r
- /* this is a bug condition - get_gdb_reg_list() may not return any other error */\r
- ERROR("BUG: unexpected error returned by get_gdb_reg_list()");\r
- exit(-1);\r
- }\r
- }\r
-\r
- for (i = 0; i < reg_list_size; i++)\r
- {\r
- reg_packet_size += reg_list[i]->size;\r
- }\r
-\r
- reg_packet = malloc(CEIL(reg_packet_size, 8) * 2);\r
- reg_packet_p = reg_packet;\r
-\r
- for (i = 0; i < reg_list_size; i++)\r
- {\r
- gdb_str_to_target(target, reg_packet_p, reg_list[i]);\r
- reg_packet_p += CEIL(reg_list[i]->size, 8) * 2;\r
- }\r
-\r
-#ifdef _DEBUG_GDB_IO_\r
- {\r
- char *reg_packet_p;\r
- reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2);\r
- DEBUG("reg_packet: %s", reg_packet_p);\r
- free(reg_packet_p);\r
- }\r
-#endif\r
-\r
- gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2);\r
- free(reg_packet);\r
-\r
- free(reg_list);\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size)\r
-{\r
- int i;\r
- reg_t **reg_list;\r
- int reg_list_size;\r
- int retval;\r
- char *packet_p;\r
-\r
-#ifdef _DEBUG_GDB_IO_\r
- DEBUG("-");\r
-#endif\r
-\r
- /* skip command character */\r
- packet++;\r
- packet_size--;\r
-\r
- if (packet_size % 2)\r
- {\r
- WARNING("GDB set_registers packet with uneven characters received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)\r
- {\r
- switch (retval)\r
- {\r
- case ERROR_TARGET_NOT_HALTED:\r
- ERROR("gdb tried to registers but we're not halted, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- default:\r
- /* this is a bug condition - get_gdb_reg_list() may not return any other error */\r
- ERROR("BUG: unexpected error returned by get_gdb_reg_list()");\r
- exit(-1);\r
- }\r
- }\r
-\r
- packet_p = packet;\r
- for (i = 0; i < reg_list_size; i++)\r
- {\r
- u8 *bin_buf;\r
- char *hex_buf;\r
- reg_arch_type_t *arch_type;\r
-\r
- /* convert from GDB-string (target-endian) to hex-string (big-endian) */\r
- hex_buf = malloc(CEIL(reg_list[i]->size, 8) * 2);\r
- gdb_target_to_str(target, packet_p, hex_buf);\r
-\r
- /* convert hex-string to binary buffer */\r
- bin_buf = malloc(CEIL(reg_list[i]->size, 8));\r
- str_to_buf(hex_buf, CEIL(reg_list[i]->size, 8) * 2, bin_buf, reg_list[i]->size, 16);\r
-\r
- /* get register arch_type, and call set method */ \r
- arch_type = register_get_arch_type(reg_list[i]->arch_type);\r
- if (arch_type == NULL)\r
- {\r
- ERROR("BUG: encountered unregistered arch type");\r
- exit(-1);\r
- }\r
- arch_type->set(reg_list[i], bin_buf);\r
-\r
- /* advance packet pointer */ \r
- packet_p += (CEIL(reg_list[i]->size, 8) * 2);\r
-\r
- free(bin_buf);\r
- free(hex_buf);\r
- }\r
-\r
- /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */ \r
- free(reg_list);\r
-\r
- gdb_put_packet(connection, "OK", 2);\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)\r
-{\r
- char *reg_packet;\r
- int reg_num = strtoul(packet + 1, NULL, 16);\r
- reg_t **reg_list;\r
- int reg_list_size;\r
- int retval;\r
-\r
-#ifdef _DEBUG_GDB_IO_\r
- DEBUG("-");\r
-#endif\r
-\r
- if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)\r
- {\r
- switch (retval)\r
- {\r
- case ERROR_TARGET_NOT_HALTED:\r
- ERROR("gdb requested registers but we're not halted, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- default:\r
- /* this is a bug condition - get_gdb_reg_list() may not return any other error */\r
- ERROR("BUG: unexpected error returned by get_gdb_reg_list()");\r
- exit(-1);\r
- }\r
- }\r
-\r
- if (reg_list_size <= reg_num)\r
- {\r
- ERROR("gdb requested a non-existing register");\r
- exit(-1);\r
- }\r
-\r
- reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);\r
-\r
- gdb_str_to_target(target, reg_packet, reg_list[reg_num]);\r
-\r
- gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2);\r
-\r
- free(reg_list);\r
- free(reg_packet);\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)\r
-{\r
- char *separator;\r
- char *hex_buf;\r
- u8 *bin_buf;\r
- int reg_num = strtoul(packet + 1, &separator, 16);\r
- reg_t **reg_list;\r
- int reg_list_size;\r
- int retval;\r
- reg_arch_type_t *arch_type;\r
-\r
- DEBUG("-");\r
-\r
- if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)\r
- {\r
- switch (retval)\r
- {\r
- case ERROR_TARGET_NOT_HALTED:\r
- ERROR("gdb tried to set a register but we're not halted, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- default:\r
- /* this is a bug condition - get_gdb_reg_list() may not return any other error */\r
- ERROR("BUG: unexpected error returned by get_gdb_reg_list()");\r
- exit(-1);\r
- }\r
- }\r
-\r
- if (reg_list_size < reg_num)\r
- {\r
- ERROR("gdb requested a non-existing register");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- if (*separator != '=')\r
- {\r
- ERROR("GDB 'set register packet', but no '=' following the register number");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- /* convert from GDB-string (target-endian) to hex-string (big-endian) */\r
- hex_buf = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);\r
- gdb_target_to_str(target, separator + 1, hex_buf);\r
-\r
- /* convert hex-string to binary buffer */\r
- bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8));\r
- str_to_buf(hex_buf, CEIL(reg_list[reg_num]->size, 8) * 2, bin_buf, reg_list[reg_num]->size, 16);\r
-\r
- /* get register arch_type, and call set method */ \r
- arch_type = register_get_arch_type(reg_list[reg_num]->arch_type);\r
- if (arch_type == NULL)\r
- {\r
- ERROR("BUG: encountered unregistered arch type");\r
- exit(-1);\r
- }\r
- arch_type->set(reg_list[reg_num], bin_buf);\r
-\r
- gdb_put_packet(connection, "OK", 2);\r
-\r
- free(bin_buf);\r
- free(hex_buf);\r
- free(reg_list);\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_memory_packet_error(connection_t *connection, int retval)\r
-{\r
- switch (retval)\r
- {\r
- case ERROR_TARGET_NOT_HALTED:\r
- ERROR("gdb tried to read memory but we're not halted, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- case ERROR_TARGET_DATA_ABORT:\r
- gdb_send_error(connection, EIO);\r
- break;\r
- case ERROR_TARGET_TRANSLATION_FAULT:\r
- gdb_send_error(connection, EFAULT);\r
- break;\r
- case ERROR_TARGET_UNALIGNED_ACCESS:\r
- gdb_send_error(connection, EFAULT);\r
- break;\r
- default:\r
- /* This could be that the target reset itself. */\r
- ERROR("unexpected error %i. Dropping connection.", retval);\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-/* We don't have to worry about the default 2 second timeout for GDB packets,\r
- * because GDB breaks up large memory reads into smaller reads.\r
- * \r
- * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192?????\r
- */\r
-int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)\r
-{\r
- char *separator;\r
- u32 addr = 0;\r
- u32 len = 0;\r
-\r
- u8 *buffer;\r
- char *hex_buffer;\r
-\r
- int retval = ERROR_OK;\r
-\r
- /* skip command character */\r
- packet++;\r
-\r
- addr = strtoul(packet, &separator, 16);\r
-\r
- if (*separator != ',')\r
- {\r
- ERROR("incomplete read memory packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- len = strtoul(separator+1, NULL, 16);\r
-\r
- buffer = malloc(len);\r
-\r
- DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);\r
-\r
- retval = target_read_buffer(target, addr, len, buffer);\r
-\r
- if ((retval == ERROR_TARGET_DATA_ABORT) && (!gdb_report_data_abort))\r
- {\r
- /* TODO : Here we have to lie and send back all zero's lest stack traces won't work.\r
- * At some point this might be fixed in GDB, in which case this code can be removed.\r
- * \r
- * OpenOCD developers are acutely aware of this problem, but there is nothing\r
- * gained by involving the user in this problem that hopefully will get resolved\r
- * eventually\r
- * \r
- * http://sourceware.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=2395\r
- *\r
- * For now, the default is to fix up things to make current GDB versions work.\r
- * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.\r
- */\r
- memset(buffer, 0, len);\r
- retval = ERROR_OK;\r
- }\r
-\r
- if (retval == ERROR_OK)\r
- {\r
- hex_buffer = malloc(len * 2 + 1);\r
-\r
- int i;\r
- for (i = 0; i < len; i++)\r
- {\r
- u8 t = buffer[i];\r
- hex_buffer[2 * i] = DIGITS[(t >> 4) & 0xf];\r
- hex_buffer[2 * i + 1] = DIGITS[t & 0xf];\r
- }\r
-\r
- gdb_put_packet(connection, hex_buffer, len * 2);\r
-\r
- free(hex_buffer);\r
- }\r
- else\r
- {\r
- retval = gdb_memory_packet_error(connection, retval);\r
- }\r
-\r
- free(buffer);\r
-\r
- return retval;\r
-}\r
-\r
-int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)\r
-{\r
- char *separator;\r
- u32 addr = 0;\r
- u32 len = 0;\r
-\r
- u8 *buffer;\r
-\r
- int i;\r
- int retval;\r
-\r
- /* skip command character */\r
- packet++;\r
-\r
- addr = strtoul(packet, &separator, 16);\r
-\r
- if (*separator != ',')\r
- {\r
- ERROR("incomplete write memory packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- len = strtoul(separator+1, &separator, 16);\r
-\r
- if (*(separator++) != ':')\r
- {\r
- ERROR("incomplete write memory packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- buffer = malloc(len);\r
-\r
- DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);\r
-\r
- for (i=0; i<len; i++)\r
- {\r
- u32 tmp;\r
- sscanf(separator + 2*i, "%2x", &tmp);\r
- buffer[i] = tmp;\r
- }\r
-\r
- retval = target_write_buffer(target, addr, len, buffer);\r
-\r
- if (retval == ERROR_OK)\r
- {\r
- gdb_put_packet(connection, "OK", 2);\r
- }\r
- else\r
- {\r
- if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)\r
- return retval; \r
- }\r
-\r
- free(buffer);\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size)\r
-{\r
- char *separator;\r
- u32 addr = 0;\r
- u32 len = 0;\r
-\r
- int retval;\r
-\r
- /* skip command character */\r
- packet++;\r
-\r
- addr = strtoul(packet, &separator, 16);\r
-\r
- if (*separator != ',')\r
- {\r
- ERROR("incomplete write memory binary packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- len = strtoul(separator+1, &separator, 16);\r
-\r
- if (*(separator++) != ':')\r
- {\r
- ERROR("incomplete write memory binary packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- retval = ERROR_OK;\r
- if (len)\r
- {\r
- DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);\r
-\r
- retval = target_write_buffer(target, addr, len, (u8*)separator);\r
- }\r
-\r
- if (retval == ERROR_OK)\r
- {\r
- gdb_put_packet(connection, "OK", 2);\r
- }\r
- else\r
- {\r
- if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)\r
- return retval; \r
- }\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-void gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)\r
-{\r
- int current = 0;\r
- u32 address = 0x0;\r
-\r
- DEBUG("-");\r
-\r
- if (packet_size > 1)\r
- {\r
- packet[packet_size] = 0;\r
- address = strtoul(packet + 1, NULL, 16);\r
- }\r
- else\r
- {\r
- current = 1;\r
- }\r
-\r
- if (packet[0] == 'c')\r
- {\r
- DEBUG("continue");\r
- target->type->resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */\r
- }\r
- else if (packet[0] == 's')\r
- {\r
- DEBUG("step");\r
- target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */\r
- }\r
-}\r
-\r
-int gdb_bp_wp_packet_error(connection_t *connection, int retval)\r
-{\r
- switch (retval)\r
- {\r
- case ERROR_TARGET_NOT_HALTED:\r
- ERROR("gdb tried to set a breakpoint but we're not halted, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- break;\r
- case ERROR_TARGET_RESOURCE_NOT_AVAILABLE:\r
- gdb_send_error(connection, EBUSY);\r
- break;\r
- default:\r
- ERROR("BUG: unexpected error %i", retval);\r
- exit(-1);\r
- }\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)\r
-{\r
- int type;\r
- enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;\r
- enum watchpoint_rw wp_type;\r
- u32 address;\r
- u32 size;\r
- char *separator;\r
- int retval;\r
-\r
- DEBUG("-");\r
-\r
- type = strtoul(packet + 1, &separator, 16);\r
-\r
- if (type == 0) /* memory breakpoint */\r
- bp_type = BKPT_SOFT;\r
- else if (type == 1) /* hardware breakpoint */\r
- bp_type = BKPT_HARD;\r
- else if (type == 2) /* write watchpoint */\r
- wp_type = WPT_WRITE;\r
- else if (type == 3) /* read watchpoint */\r
- wp_type = WPT_READ;\r
- else if (type == 4) /* access watchpoint */\r
- wp_type = WPT_ACCESS;\r
-\r
- if (*separator != ',')\r
- {\r
- ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- address = strtoul(separator+1, &separator, 16);\r
-\r
- if (*separator != ',')\r
- {\r
- ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- size = strtoul(separator+1, &separator, 16);\r
-\r
- switch (type)\r
- {\r
- case 0:\r
- case 1:\r
- if (packet[0] == 'Z')\r
- {\r
- if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)\r
- {\r
- if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)\r
- return retval;\r
- }\r
- else\r
- {\r
- gdb_put_packet(connection, "OK", 2);\r
- }\r
- }\r
- else\r
- {\r
- breakpoint_remove(target, address);\r
- gdb_put_packet(connection, "OK", 2);\r
- }\r
- break;\r
- case 2:\r
- case 3:\r
- case 4:\r
- {\r
- if (packet[0] == 'Z')\r
- {\r
- if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK)\r
- {\r
- if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)\r
- return retval;\r
- }\r
- else\r
- {\r
- gdb_put_packet(connection, "OK", 2);\r
- }\r
- }\r
- else\r
- {\r
- watchpoint_remove(target, address);\r
- gdb_put_packet(connection, "OK", 2);\r
- }\r
- break;\r
- }\r
- default:\r
- break;\r
- }\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-/* print out a string and allocate more space as needed, mainly used for XML at this point */\r
-void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, ...)\r
-{\r
- if (*retval != ERROR_OK)\r
- {\r
- return;\r
- }\r
- int first = 1;\r
- \r
- for (;;)\r
- {\r
- if ((*xml == NULL) || (!first))\r
- {\r
- /* start by 0 to exercise all the code paths.\r
- * Need minimum 2 bytes to fit 1 char and 0 terminator. */\r
- \r
- *size = *size * 2 + 2;\r
- char *t = *xml;\r
- *xml = realloc(*xml, *size);\r
- if (*xml == NULL)\r
- {\r
- if (t)\r
- free(t);\r
- *retval = ERROR_SERVER_REMOTE_CLOSED;\r
- return;\r
- }\r
- }\r
- \r
- va_list ap;\r
- int ret;\r
- va_start(ap, fmt);\r
- ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap);\r
- va_end(ap);\r
- if ((ret > 0) && ((ret + 1) < *size - *pos))\r
- {\r
- *pos += ret;\r
- return;\r
- }\r
- /* there was just enough or not enough space, allocate more. */\r
- first = 0;\r
- }\r
-}\r
-\r
-static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len)\r
-{\r
- char *separator;\r
- \r
- /* Extract and NUL-terminate the annex. */\r
- *annex = buf;\r
- while (*buf && *buf != ':')\r
- buf++;\r
- if (*buf == '\0')\r
- return -1;\r
- *buf++ = 0;\r
- \r
- /* After the read marker and annex, qXfer looks like a\r
- * traditional 'm' packet. */\r
- \r
- *ofs = strtoul(buf, &separator, 16);\r
-\r
- if (*separator != ',')\r
- return -1;\r
-\r
- *len = strtoul(separator+1, NULL, 16);\r
- \r
- return 0;\r
-}\r
-\r
-int gdb_calc_blocksize(flash_bank_t *bank)\r
-{\r
- int i;\r
- int block_size = 0xffffffff;\r
- \r
- /* loop through all sectors and return smallest sector size */\r
- \r
- for (i = 0; i < bank->num_sectors; i++)\r
- {\r
- if (bank->sectors[i].size < block_size)\r
- block_size = bank->sectors[i].size;\r
- }\r
- \r
- return block_size;\r
-}\r
-\r
-int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size)\r
-{\r
- command_context_t *cmd_ctx = connection->cmd_ctx;\r
- \r
- if (strstr(packet, "qRcmd,"))\r
- {\r
- if (packet_size > 6)\r
- {\r
- char *cmd;\r
- int i;\r
- cmd = malloc((packet_size - 6)/2 + 1);\r
- for (i=0; i < (packet_size - 6)/2; i++)\r
- {\r
- u32 tmp;\r
- sscanf(packet + 6 + 2*i, "%2x", &tmp);\r
- cmd[i] = tmp;\r
- }\r
- cmd[(packet_size - 6)/2] = 0x0;\r
- \r
- /* We want to print all debug output to GDB connection */\r
- log_setCallback(gdb_log_callback, connection);\r
- target_call_timer_callbacks();\r
- command_run_line(cmd_ctx, cmd);\r
- free(cmd);\r
- }\r
- gdb_put_packet(connection, "OK", 2);\r
- return ERROR_OK;\r
- }\r
- else if (strstr(packet, "qCRC:"))\r
- {\r
- if (packet_size > 5)\r
- {\r
- int retval;\r
- char gdb_reply[10];\r
- char *separator;\r
- u32 checksum;\r
- u32 addr = 0;\r
- u32 len = 0;\r
- \r
- /* skip command character */\r
- packet += 5;\r
- \r
- addr = strtoul(packet, &separator, 16);\r
- \r
- if (*separator != ',')\r
- {\r
- ERROR("incomplete read memory packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
- \r
- len = strtoul(separator + 1, NULL, 16);\r
- \r
- retval = target_checksum_memory(target, addr, len, &checksum);\r
- \r
- if (retval == ERROR_OK)\r
- {\r
- snprintf(gdb_reply, 10, "C%8.8x", checksum);\r
- gdb_put_packet(connection, gdb_reply, 9);\r
- }\r
- else\r
- {\r
- if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)\r
- return retval; \r
- }\r
- \r
- return ERROR_OK;\r
- }\r
- }\r
- else if (strstr(packet, "qSupported"))\r
- {\r
- /* we currently support packet size and qXfer:memory-map:read (if enabled)\r
- * disable qXfer:features:read for the moment */\r
- int retval = ERROR_OK;\r
- char *buffer = NULL;\r
- int pos = 0;\r
- int size = 0;\r
-\r
- xml_printf(&retval, &buffer, &pos, &size, \r
- "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-",\r
- (GDB_BUFFER_SIZE - 1), gdb_use_memory_map == 1 ? '+' : '-');\r
- \r
- if (retval != ERROR_OK)\r
- {\r
- gdb_send_error(connection, 01);\r
- return ERROR_OK;\r
- }\r
- \r
- gdb_put_packet(connection, buffer, strlen(buffer));\r
- free(buffer);\r
- \r
- return ERROR_OK;\r
- }\r
- else if (strstr(packet, "qXfer:memory-map:read::"))\r
- {\r
- /* We get away with only specifying flash here. Regions that are not\r
- * specified are treated as if we provided no memory map(if not we \r
- * could detect the holes and mark them as RAM).\r
- * Normally we only execute this code once, but no big deal if we\r
- * have to regenerate it a couple of times. */\r
- \r
- flash_bank_t *p;\r
- char *xml = NULL;\r
- int size = 0;\r
- int pos = 0;\r
- int retval = ERROR_OK;\r
- \r
- int offset;\r
- int length;\r
- char *separator;\r
- int blocksize;\r
- \r
- /* skip command character */\r
- packet += 23;\r
- \r
- offset = strtoul(packet, &separator, 16);\r
- length = strtoul(separator + 1, &separator, 16);\r
- \r
- xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");\r
- \r
- int i = 0;\r
- for (;;)\r
- {\r
- p = get_flash_bank_by_num(i);\r
- if (p == NULL)\r
- break;\r
- \r
- /* if device has uneven sector sizes, eg. str7, lpc\r
- * we pass the smallest sector size to gdb memory map */\r
- blocksize = gdb_calc_blocksize(p);\r
- \r
- xml_printf(&retval, &xml, &pos, &size, "<memory type=\"flash\" start=\"0x%x\" length=\"0x%x\">\n" \\r
- "<property name=\"blocksize\">0x%x</property>\n" \\r
- "</memory>\n", \\r
- p->base, p->size, blocksize);\r
- i++;\r
- }\r
- \r
- xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");\r
-\r
- if (retval != ERROR_OK)\r
- {\r
- gdb_send_error(connection, retval);\r
- return retval;\r
- }\r
- \r
- if (offset + length > pos)\r
- {\r
- length = pos - offset;\r
- }\r
-\r
- char *t = malloc(length + 1);\r
- t[0] = 'l';\r
- memcpy(t + 1, xml + offset, length);\r
- gdb_put_packet(connection, t, length + 1);\r
- \r
- free(t);\r
- free(xml);\r
- return ERROR_OK;\r
- }\r
- else if (strstr(packet, "qXfer:features:read:"))\r
- { \r
- char *xml = NULL;\r
- int size = 0;\r
- int pos = 0;\r
- int retval = ERROR_OK;\r
- \r
- int offset;\r
- unsigned int length;\r
- char *annex;\r
- \r
- /* skip command character */\r
- packet += 20;\r
- \r
- if (decode_xfer_read(packet, &annex, &offset, &length) < 0)\r
- {\r
- gdb_send_error(connection, 01);\r
- return ERROR_OK;\r
- }\r
- \r
- if (strcmp(annex, "target.xml") != 0)\r
- {\r
- gdb_send_error(connection, 01);\r
- return ERROR_OK;\r
- }\r
- \r
- xml_printf(&retval, &xml, &pos, &size, \\r
- "l<target version=\"1.0\">\n<architecture>arm</architecture>\n</target>\n");\r
- \r
- if (retval != ERROR_OK)\r
- {\r
- gdb_send_error(connection, retval);\r
- return retval;\r
- }\r
- \r
- gdb_put_packet(connection, xml, strlen(xml) + 1);\r
- \r
- free(xml);\r
- return ERROR_OK;\r
- }\r
- \r
- gdb_put_packet(connection, "", 0);\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int packet_size)\r
-{\r
- gdb_connection_t *gdb_connection = connection->priv;\r
- gdb_service_t *gdb_service = connection->service->priv;\r
- int result;\r
-\r
- /* if flash programming disabled - send a empty reply */\r
- \r
- if (gdb_flash_program == 0)\r
- {\r
- gdb_put_packet(connection, "", 0);\r
- return ERROR_OK;\r
- }\r
- \r
- if (strstr(packet, "vFlashErase:"))\r
- {\r
- unsigned long addr;\r
- unsigned long length;\r
- \r
- char *parse = packet + 12;\r
- if (*parse == '\0')\r
- {\r
- ERROR("incomplete vFlashErase packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- addr = strtoul(parse, &parse, 16);\r
-\r
- if (*(parse++) != ',' || *parse == '\0')\r
- {\r
- ERROR("incomplete vFlashErase packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
-\r
- length = strtoul(parse, &parse, 16);\r
-\r
- if (*parse != '\0')\r
- {\r
- ERROR("incomplete vFlashErase packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
- \r
- /* assume all sectors need erasing - stops any problems\r
- * when flash_write is called multiple times */\r
- flash_set_dirty();\r
- \r
- /* perform any target specific operations before the erase */\r
- target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_PROGRAM);\r
- \r
- /* perform erase */\r
- if ((result = flash_erase_address_range(gdb_service->target, addr, length)) != ERROR_OK)\r
- {\r
- /* GDB doesn't evaluate the actual error number returned,\r
- * treat a failed erase as an I/O error\r
- */\r
- gdb_send_error(connection, EIO);\r
- ERROR("flash_erase returned %i", result);\r
- }\r
- else\r
- gdb_put_packet(connection, "OK", 2);\r
- \r
- return ERROR_OK;\r
- }\r
-\r
- if (strstr(packet, "vFlashWrite:"))\r
- {\r
- unsigned long addr;\r
- unsigned long length;\r
- char *parse = packet + 12;\r
-\r
- if (*parse == '\0')\r
- {\r
- ERROR("incomplete vFlashErase packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
- addr = strtoul(parse, &parse, 16);\r
- if (*(parse++) != ':')\r
- {\r
- ERROR("incomplete vFlashErase packet received, dropping connection");\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- }\r
- length = packet_size - (parse - packet);\r
- \r
- /* create a new image if there isn't already one */\r
- if (gdb_connection->vflash_image == NULL)\r
- {\r
- gdb_connection->vflash_image = malloc(sizeof(image_t));\r
- image_open(gdb_connection->vflash_image, "", "build");\r
- }\r
-\r
- /* create new section with content from packet buffer */\r
- image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (u8*)parse);\r
-\r
- gdb_put_packet(connection, "OK", 2);\r
-\r
- return ERROR_OK;\r
- }\r
-\r
- if (!strcmp(packet, "vFlashDone"))\r
- {\r
- u32 written;\r
-\r
- /* process the flashing buffer. No need to erase as GDB\r
- * always issues a vFlashErase first. */\r
- if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0)) != ERROR_OK)\r
- {\r
- if (result == ERROR_FLASH_DST_OUT_OF_BANK)\r
- gdb_put_packet(connection, "E.memtype", 9);\r
- else\r
- gdb_send_error(connection, EIO);\r
- }\r
- else\r
- {\r
- DEBUG("wrote %u bytes from vFlash image to flash", written);\r
- gdb_put_packet(connection, "OK", 2);\r
- }\r
- \r
- image_close(gdb_connection->vflash_image);\r
- free(gdb_connection->vflash_image);\r
- gdb_connection->vflash_image = NULL;\r
- \r
- return ERROR_OK;\r
- }\r
-\r
- gdb_put_packet(connection, "", 0);\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_detach(connection_t *connection, target_t *target)\r
-{\r
- switch( detach_mode )\r
- {\r
- case GDB_DETACH_RESUME:\r
- target->type->resume(target, 1, 0, 1, 0);\r
- break;\r
- \r
- case GDB_DETACH_RESET:\r
- target_process_reset(connection->cmd_ctx);\r
- break;\r
- \r
- case GDB_DETACH_HALT:\r
- target->type->halt(target);\r
- break;\r
- \r
- case GDB_DETACH_NOTHING:\r
- break;\r
- }\r
- \r
- gdb_put_packet(connection, "OK", 2);\r
- \r
- return ERROR_OK;\r
-}\r
-\r
-static void gdb_log_callback(void *priv, const char *file, int line, \r
- const char *function, const char *format, va_list args)\r
-{\r
- connection_t *connection = priv;\r
- gdb_connection_t *gdb_con = connection->priv;\r
- \r
- if (gdb_con->busy)\r
- {\r
- /* do not reply this using the O packet */\r
- return;\r
- }\r
-\r
- char *t = allocPrintf(format, args);\r
- if (t == NULL)\r
- return;\r
- \r
- gdb_output_con(connection, t); \r
- \r
- free(t);\r
-}\r
-\r
-int gdb_input_inner(connection_t *connection)\r
-{\r
- gdb_service_t *gdb_service = connection->service->priv;\r
- target_t *target = gdb_service->target;\r
- char packet[GDB_BUFFER_SIZE];\r
- int packet_size;\r
- int retval;\r
- gdb_connection_t *gdb_con = connection->priv;\r
- static int extended_protocol = 0;\r
-\r
- /* drain input buffer */\r
- do\r
- {\r
- packet_size = GDB_BUFFER_SIZE-1;\r
- if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK)\r
- {\r
- return retval;\r
- }\r
-\r
- /* terminate with zero */\r
- packet[packet_size] = 0;\r
-\r
- DEBUG("received packet: '%s'", packet);\r
-\r
- if (packet_size > 0)\r
- {\r
- retval = ERROR_OK;\r
- switch (packet[0])\r
- {\r
- case 'H':\r
- /* Hct... -- set thread \r
- * we don't have threads, send empty reply */\r
- gdb_put_packet(connection, NULL, 0);\r
- break;\r
- case 'q':\r
- retval = gdb_query_packet(connection, target, packet, packet_size);\r
- break;\r
- case 'g':\r
- retval = gdb_get_registers_packet(connection, target, packet, packet_size);\r
- break;\r
- case 'G':\r
- retval = gdb_set_registers_packet(connection, target, packet, packet_size);\r
- break;\r
- case 'p':\r
- retval = gdb_get_register_packet(connection, target, packet, packet_size);\r
- break;\r
- case 'P':\r
- retval = gdb_set_register_packet(connection, target, packet, packet_size);\r
- break;\r
- case 'm':\r
- retval = gdb_read_memory_packet(connection, target, packet, packet_size);\r
- break;\r
- case 'M':\r
- retval = gdb_write_memory_packet(connection, target, packet, packet_size);\r
- break;\r
- case 'z':\r
- case 'Z':\r
- retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);\r
- break;\r
- case '?':\r
- gdb_last_signal_packet(connection, target, packet, packet_size);\r
- break;\r
- case 'c':\r
- case 's':\r
- {\r
- /* We're running/stepping, in which case we can \r
- * forward log output until the target is halted */\r
- gdb_connection_t *gdb_con = connection->priv;\r
- gdb_con->frontend_state = TARGET_RUNNING;\r
- log_setCallback(gdb_log_callback, connection);\r
- gdb_step_continue_packet(connection, target, packet, packet_size);\r
- }\r
- break;\r
- case 'v':\r
- retval = gdb_v_packet(connection, target, packet, packet_size);\r
- break;\r
- case 'D':\r
- retval = gdb_detach(connection, target);\r
- extended_protocol = 0;\r
- break;\r
- case 'X':\r
- if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK)\r
- return retval;\r
- break;\r
- case 'k':\r
- if (extended_protocol != 0)\r
- break;\r
- gdb_put_packet(connection, "OK", 2);\r
- return ERROR_SERVER_REMOTE_CLOSED;\r
- case '!':\r
- /* handle extended remote protocol */\r
- extended_protocol = 1;\r
- gdb_put_packet(connection, "OK", 2);\r
- break;\r
- case 'R':\r
- /* handle extended restart packet */\r
- target_process_reset(connection->cmd_ctx);\r
- break;\r
- default:\r
- /* ignore unkown packets */\r
- DEBUG("ignoring 0x%2.2x packet", packet[0]);\r
- gdb_put_packet(connection, NULL, 0);\r
- break;\r
- }\r
-\r
- /* if a packet handler returned an error, exit input loop */\r
- if (retval != ERROR_OK)\r
- return retval;\r
- }\r
-\r
- if (gdb_con->ctrl_c)\r
- {\r
- if (target->state == TARGET_RUNNING)\r
- {\r
- target->type->halt(target);\r
- gdb_con->ctrl_c = 0;\r
- }\r
- }\r
-\r
- } while (gdb_con->buf_cnt > 0);\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_input(connection_t *connection)\r
-{\r
- int retval = gdb_input_inner(connection);\r
- if (retval == ERROR_SERVER_REMOTE_CLOSED)\r
- return retval;\r
- /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_init()\r
-{\r
- gdb_service_t *gdb_service;\r
- target_t *target = targets;\r
- int i = 0;\r
-\r
- if (!target)\r
- {\r
- WARNING("no gdb ports allocated as no target has been specified");\r
- return ERROR_OK;\r
- }\r
-\r
- if (gdb_port == 0)\r
- {\r
- WARNING("no gdb port specified, using default port 3333");\r
- gdb_port = 3333;\r
- }\r
-\r
- while (target)\r
- {\r
- char service_name[8];\r
-\r
- snprintf(service_name, 8, "gdb-%2.2i", i);\r
-\r
- gdb_service = malloc(sizeof(gdb_service_t));\r
- gdb_service->target = target;\r
-\r
- add_service("gdb", CONNECTION_GDB, gdb_port + i, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);\r
-\r
- DEBUG("gdb service for target %s at port %i", target->type->name, gdb_port + i);\r
-\r
- i++;\r
- target = target->next;\r
- }\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-/* daemon configuration command gdb_port */\r
-int handle_gdb_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)\r
-{\r
- if (argc == 0)\r
- return ERROR_OK;\r
-\r
- /* only if the port wasn't overwritten by cmdline */\r
- if (gdb_port == 0)\r
- gdb_port = strtoul(args[0], NULL, 0);\r
-\r
- return ERROR_OK;\r
-}\r
-\r
-int handle_gdb_detach_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)\r
-{\r
- if (argc == 1)\r
- {\r
- if (strcmp(args[0], "resume") == 0)\r
- {\r
- detach_mode = GDB_DETACH_RESUME;\r
- return ERROR_OK;\r
- }\r
- else if (strcmp(args[0], "reset") == 0)\r
- {\r
- detach_mode = GDB_DETACH_RESET;\r
- return ERROR_OK;\r
- }\r
- else if (strcmp(args[0], "halt") == 0)\r
- {\r
- detach_mode = GDB_DETACH_HALT;\r
- return ERROR_OK;\r
- }\r
- else if (strcmp(args[0], "nothing") == 0)\r
- {\r
- detach_mode = GDB_DETACH_NOTHING;\r
- return ERROR_OK;\r
- }\r
- }\r
- \r
- WARNING("invalid gdb_detach configuration directive: %s", args[0]);\r
- return ERROR_OK;\r
-}\r
-\r
-int handle_gdb_memory_map_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)\r
-{\r
- if (argc == 1)\r
- {\r
- if (strcmp(args[0], "enable") == 0)\r
- {\r
- gdb_use_memory_map = 1;\r
- return ERROR_OK;\r
- }\r
- else if (strcmp(args[0], "disable") == 0)\r
- {\r
- gdb_use_memory_map = 0;\r
- return ERROR_OK;\r
- }\r
- }\r
- \r
- WARNING("invalid gdb_memory_map configuration directive: %s", args[0]);\r
- return ERROR_OK;\r
-}\r
-\r
-int handle_gdb_flash_program_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)\r
-{\r
- if (argc == 1)\r
- {\r
- if (strcmp(args[0], "enable") == 0)\r
- {\r
- gdb_flash_program = 1;\r
- return ERROR_OK;\r
- }\r
- else if (strcmp(args[0], "disable") == 0)\r
- {\r
- gdb_flash_program = 0;\r
- return ERROR_OK;\r
- }\r
- }\r
- \r
- WARNING("invalid gdb_memory_map configuration directive: %s", args[0]);\r
- return ERROR_OK;\r
-}\r
-\r
-int handle_gdb_report_data_abort_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)\r
-{\r
- if (argc == 1)\r
- {\r
- if (strcmp(args[0], "enable") == 0)\r
- {\r
- gdb_report_data_abort = 1;\r
- return ERROR_OK;\r
- }\r
- else if (strcmp(args[0], "disable") == 0)\r
- {\r
- gdb_report_data_abort = 0;\r
- return ERROR_OK;\r
- }\r
- }\r
- \r
- WARNING("invalid gdb_report_data_abort configuration directive: %s", args[0]);\r
- return ERROR_OK;\r
-}\r
-\r
-int gdb_register_commands(command_context_t *command_context)\r
-{\r
- register_command(command_context, NULL, "gdb_port", handle_gdb_port_command,\r
- COMMAND_CONFIG, "");\r
- register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command,\r
- COMMAND_CONFIG, "");\r
- register_command(command_context, NULL, "gdb_memory_map", handle_gdb_memory_map_command,\r
- COMMAND_CONFIG, "");\r
- register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command,\r
- COMMAND_CONFIG, "");\r
- register_command(command_context, NULL, "gdb_report_data_abort", handle_gdb_report_data_abort_command,\r
- COMMAND_CONFIG, "");\r
- return ERROR_OK;\r
-}\r
+/***************************************************************************
+ * 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 coninuing execution,
+ * we have a lingering reply. Upon receiving a halted event
+ * when we have that lingering packet, we reply to the original
+ * step or continue packet.
+ *
+ * Executing monitor commands can bring the target in and
+ * out of the running state so we'll see lots of TARGET_EVENT_XXX
+ * that are to be ignored.
+ */
+ if (gdb_connection->frontend_state == TARGET_RUNNING)
+ {
+ char sig_reply[4];
+ int signal;
+
+ /* stop forwarding log packets! */
+ log_remove_callback(gdb_log_callback, connection);
+
+ if (gdb_connection->ctrl_c)
+ {
+ signal = 0x2;
+ gdb_connection->ctrl_c = 0;
+ }
+ else
+ {
+ signal = gdb_last_signal(target);
+ }
+
+ snprintf(sig_reply, 4, "T%2.2x", signal);
+ gdb_put_packet(connection, sig_reply, 3);
+ gdb_connection->frontend_state = TARGET_HALTED;
+ }
+}
+
+int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv)
+{
+ 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++;
+
+ 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;
+
+ 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);
+ log_remove_callback(gdb_log_callback, connection);
+
+ 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 %d", get_num_by_target(target));
+ 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
+ {
+ while (target)
+ {
+ gdb_service = malloc(sizeof(gdb_service_t));
+ gdb_service->target = target;
+
+ add_service("gdb", CONNECTION_TCP, gdb_port + target->target_number, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
+
+ LOG_DEBUG("gdb service for target %s at port %i",
+ target_get_name(target),
+ gdb_port + target->target_number);
+ target = target->next;
+ }
+ }
+
+ 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;
+ }
+
+ /* only if the port wasn't overwritten by cmdline */
+ if (gdb_port == 0)
+ 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;
+}
projects / fw / openocd / blobdiff