X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Fserver%2Fgdb_server.c;h=fa203e7a6ece8b29a015fa2bebe7646558f21e48;hp=5dd6f3c207f9529a653cc99cadecf608a43bf398;hb=7f1944a47823fc48eef244257b80675a226f86b8;hpb=c35cc0b8b7463148fd6110a6357e0d141db0e247 diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c index 5dd6f3c207..fa203e7a6e 100644 --- a/src/server/gdb_server.c +++ b/src/server/gdb_server.c @@ -1,1479 +1,2107 @@ -/*************************************************************************** - * Copyright (C) 2005 by Dominic Rath * - * Dominic.Rath@gmx.de * - * * - * 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 "replacements.h" - -#include "gdb_server.h" - -#include "server.h" -#include "log.h" -#include "binarybuffer.h" -#include "breakpoints.h" -#include "flash.h" -#include "target_request.h" - -#define __USE_GNU -#include -#include -#include -#include - -#if 0 -#define _DEBUG_GDB_IO_ -#endif - -static unsigned short gdb_port; - -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: - ERROR("BUG: undefined debug reason"); - exit(-1); - } -} - -int gdb_get_char(connection_t *connection, int* next_char) -{ - gdb_connection_t *gdb_con = connection->priv; - char *debug_buffer; - - 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_ - DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); -#endif - - return ERROR_OK; - } - - while ((gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE)) <= 0) - { - if (gdb_con->buf_cnt == 0) - return ERROR_SERVER_REMOTE_CLOSED; - -#ifdef _WIN32 - errno = WSAGetLastError(); - - switch(errno) - { - case WSAEWOULDBLOCK: - usleep(1000); - break; - case WSAECONNABORTED: - return ERROR_SERVER_REMOTE_CLOSED; - default: - ERROR("read: %d", errno); - exit(-1); - } -#else - switch(errno) - { - case EAGAIN: - usleep(1000); - break; - case ECONNABORTED: - return ERROR_SERVER_REMOTE_CLOSED; - case ECONNRESET: - return ERROR_SERVER_REMOTE_CLOSED; - default: - ERROR("read: %s", strerror(errno)); - exit(-1); - } -#endif - } - - debug_buffer = malloc(gdb_con->buf_cnt + 1); - memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt); - debug_buffer[gdb_con->buf_cnt] = 0; - DEBUG("received '%s'", debug_buffer); - free(debug_buffer); - - 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_ - DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); -#endif - - return ERROR_OK; -} - -int gdb_putback_char(connection_t *connection, int last_char) -{ - gdb_connection_t *gdb_con = connection->priv; - - if (gdb_con->buf_p > gdb_con->buffer) - { - *(--gdb_con->buf_p) = last_char; - gdb_con->buf_cnt++; - } - else - { - ERROR("BUG: couldn't put character back"); - } - - return ERROR_OK; -} - -int gdb_put_packet(connection_t *connection, char *buffer, int len) -{ - int i; - unsigned char my_checksum = 0; - char checksum[3]; - char *debug_buffer; - int reply; - int retval; - gdb_connection_t *gdb_con = connection->priv; - - for (i = 0; i < len; i++) - my_checksum += buffer[i]; - - while (1) - { - - debug_buffer = malloc(len + 1); - memcpy(debug_buffer, buffer, len); - debug_buffer[len] = 0; - DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum); - free(debug_buffer); - - write_socket(connection->fd, "$", 1); - if (len > 0) - write_socket(connection->fd, buffer, len); - write_socket(connection->fd, "#", 1); - - snprintf(checksum, 3, "%2.2x", my_checksum); - - write_socket(connection->fd, checksum, 2); - - if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK) - return retval; - - if (reply == '+') - break; - else if (reply == '-') - 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 == '-') - WARNING("negative reply, retrying"); - else - { - ERROR("unknown character 0x%2.2x in reply, dropping connection", reply); - return ERROR_SERVER_REMOTE_CLOSED; - } - } - else - { - ERROR("unknown character 0x%2.2x in reply, dropping connection", reply); - return ERROR_SERVER_REMOTE_CLOSED; - } - } - - return ERROR_OK; -} - -int gdb_get_packet(connection_t *connection, char *buffer, int *len) -{ - int character; - int count = 0; - int retval; - char checksum[3]; - unsigned char my_checksum = 0; - gdb_connection_t *gdb_con = connection->priv; - - while (1) - { - do - { - if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) - return retval; - - DEBUG("character: '%c'", character); - - switch (character) - { - case '$': - break; - case '+': - WARNING("acknowledgment received, but no packet pending"); - break; - case '-': - WARNING("negative acknowledgment, but no packet pending"); - break; - case 0x3: - gdb_con->ctrl_c = 1; - *len = 0; - return ERROR_OK; - default: - WARNING("ignoring character 0x%x", character); - break; - } - } while (character != '$'); - - my_checksum = 0; - - do - { - 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; - } - - if (count > *len) - { - ERROR("packet buffer too small"); - return ERROR_GDB_BUFFER_TOO_SMALL; - } - } while (1); - - *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 (my_checksum == strtoul(checksum, NULL, 16)) - { - write_socket(connection->fd, "+", 1); - break; - } - - WARNING("checksum error, requesting retransmission"); - write_socket(connection->fd, "-", 1); - } - - return ERROR_OK; -} - -int gdb_output(struct command_context_s *context, char* line) -{ - connection_t *connection = context->output_handler_priv; - char *hex_buffer; - int i, bin_size; - - bin_size = strlen(line); - - hex_buffer = malloc(bin_size*2 + 4); - - hex_buffer[0] = 'O'; - for (i=0; ipriv; - char sig_reply[4]; - int signal; - - switch (event) - { - case TARGET_EVENT_HALTED: - if (gdb_connection->frontend_state == TARGET_RUNNING) - { - 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; - } - break; - case TARGET_EVENT_RESUMED: - if (gdb_connection->frontend_state == TARGET_HALTED) - { - gdb_connection->frontend_state = TARGET_RUNNING; - } - 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; - - /* output goes through gdb connection */ - command_set_output_handler(connection->cmd_ctx, gdb_output, connection); - - /* register callback to be informed about target events */ - target_register_event_callback(gdb_target_callback_event_handler, connection); - - /* a gdb session just attached, put the target in halt mode */ - if (((retval = gdb_service->target->type->halt(gdb_service->target)) != ERROR_OK) && - (retval != ERROR_TARGET_ALREADY_HALTED)) - { - ERROR("error when trying to halt target"); - exit(-1); - } - - while (gdb_service->target->state != TARGET_HALTED) - { - gdb_service->target->type->poll(gdb_service->target); - } - - /* remove the initial ACK from the incoming buffer */ - if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK) - return retval; - - if (initial_ack != '+') - gdb_putback_char(connection, initial_ack); - - return ERROR_OK; -} - -int gdb_connection_closed(connection_t *connection) -{ - gdb_service_t *gdb_service = connection->service->priv; - gdb_connection_t *gdb_connection = connection->priv; - - /* see if an image built with vFlash commands is left */ - if (gdb_connection->vflash_image) - { - image_close(gdb_connection->vflash_image); - free(gdb_connection->vflash_image); - gdb_connection->vflash_image = NULL; - } - - /* if this connection registered a debug-message receiver delete it */ - delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target); - - if (connection->priv) - free(connection->priv); - else - ERROR("BUG: connection->priv == NULL"); - - target_unregister_event_callback(gdb_target_callback_event_handler, connection); - - return ERROR_OK; -} - -void gdb_send_error(connection_t *connection, u8 the_error) -{ - char err[4]; - snprintf(err, 4, "E%2.2X", the_error ); - gdb_put_packet(connection, err, 3); -} - -int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size) -{ - char sig_reply[4]; - int signal; - - signal = gdb_last_signal(target); - - snprintf(sig_reply, 4, "S%2.2x", signal); - gdb_put_packet(connection, sig_reply, 3); - - return ERROR_OK; -} - -void gdb_str_to_target(target_t *target, char *str, char *tstr) -{ - int str_len = strlen(str); - int i; - - if (str_len % 2) - { - ERROR("BUG: gdb value with uneven number of characters encountered: %s", str); - exit(-1); - } - - if (target->endianness == TARGET_LITTLE_ENDIAN) - { - for (i = 0; i < str_len; i+=2) - { - tstr[str_len - i - 1] = str[i + 1]; - tstr[str_len - i - 2] = str[i]; - } - } - else - { - for (i = 0; i < str_len; i++) - { - tstr[i] = str[i]; - } - } -} - -void gdb_target_to_str(target_t *target, char *tstr, char *str) -{ - int str_len = strlen(tstr); - int i; - - if (str_len % 2) - { - ERROR("BUG: gdb value with uneven number of characters encountered"); - exit(-1); - } - - if (target->endianness == TARGET_LITTLE_ENDIAN) - { - for (i = 0; i < str_len; i+=2) - { - str[str_len - i - 1] = tstr[i + 1]; - str[str_len - i - 2] = tstr[i]; - } - } - else - { - for (i = 0; i < str_len; i++) - { - str[i] = tstr[i]; - } - } -} - -int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size) -{ - reg_t **reg_list; - int reg_list_size; - int retval; - int reg_packet_size = 0; - char *reg_packet; - char *reg_packet_p; - int i; - - DEBUG("-"); - - if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb requested registers but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } - } - - 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++) - { - char *hex_buf = buf_to_str(reg_list[i]->value, reg_list[i]->size, 16); - DEBUG("hex_buf: %s", hex_buf); - gdb_str_to_target(target, hex_buf, reg_packet_p); - reg_packet_p += CEIL(reg_list[i]->size, 8) * 2; - free(hex_buf); - } - - reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2); - DEBUG("reg_packet: %s", reg_packet_p); - free(reg_packet_p); - - gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2); - free(reg_packet); - - free(reg_list); - - return ERROR_OK; -} - -int gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - int i; - reg_t **reg_list; - int reg_list_size; - int retval; - char *packet_p; - - DEBUG("-"); - - /* skip command character */ - packet++; - packet_size--; - - if (packet_size % 2) - { - WARNING("GDB set_registers packet with uneven characters received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb tried to registers but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } - } - - packet_p = packet; - for (i = 0; i < reg_list_size; i++) - { - u8 *bin_buf; - char *hex_buf; - reg_arch_type_t *arch_type; - - /* convert from GDB-string (target-endian) to hex-string (big-endian) */ - hex_buf = malloc(CEIL(reg_list[i]->size, 8) * 2); - gdb_target_to_str(target, packet_p, hex_buf); - - /* convert hex-string to binary buffer */ - bin_buf = malloc(CEIL(reg_list[i]->size, 8)); - str_to_buf(hex_buf, CEIL(reg_list[i]->size, 8) * 2, bin_buf, reg_list[i]->size, 16); - - /* get register arch_type, and call set method */ - arch_type = register_get_arch_type(reg_list[i]->arch_type); - if (arch_type == NULL) - { - ERROR("BUG: encountered unregistered arch type"); - exit(-1); - } - arch_type->set(reg_list[i], bin_buf); - - /* advance packet pointer */ - packet_p += (CEIL(reg_list[i]->size, 8) * 2); - - free(bin_buf); - free(hex_buf); - } - - /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */ - free(reg_list); - - gdb_put_packet(connection, "OK", 2); - - return ERROR_OK; -} - -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; - char *hex_buf; - - DEBUG("-"); - - if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb requested registers but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } - } - - if (reg_list_size <= reg_num) - { - ERROR("gdb requested a non-existing register"); - exit(-1); - } - - reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2); - - hex_buf = buf_to_str(reg_list[reg_num]->value, reg_list[reg_num]->size, 16); - - gdb_str_to_target(target, hex_buf, reg_packet); - - gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2); - - free(reg_list); - free(reg_packet); - free(hex_buf); - - return ERROR_OK; -} - -int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - char *separator; - char *hex_buf; - u8 *bin_buf; - int reg_num = strtoul(packet + 1, &separator, 16); - reg_t **reg_list; - int reg_list_size; - int retval; - reg_arch_type_t *arch_type; - - DEBUG("-"); - - if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb tried to set a register but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } - } - - if (reg_list_size < reg_num) - { - ERROR("gdb requested a non-existing register"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - if (*separator != '=') - { - ERROR("GDB 'set register packet', but no '=' following the register number"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - /* convert from GDB-string (target-endian) to hex-string (big-endian) */ - hex_buf = malloc(CEIL(reg_list[reg_num]->size, 8) * 2); - gdb_target_to_str(target, separator + 1, hex_buf); - - /* convert hex-string to binary buffer */ - bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8)); - str_to_buf(hex_buf, CEIL(reg_list[reg_num]->size, 8) * 2, bin_buf, reg_list[reg_num]->size, 16); - - /* get register arch_type, and call set method */ - arch_type = register_get_arch_type(reg_list[reg_num]->arch_type); - if (arch_type == NULL) - { - ERROR("BUG: encountered unregistered arch type"); - exit(-1); - } - arch_type->set(reg_list[reg_num], bin_buf); - - gdb_put_packet(connection, "OK", 2); - - free(bin_buf); - free(hex_buf); - free(reg_list); - - return ERROR_OK; -} - -int gdb_memory_packet_error(connection_t *connection, int retval) -{ - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb tried to read memory but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - break; - case ERROR_TARGET_DATA_ABORT: - gdb_send_error(connection, EIO); - break; - case ERROR_TARGET_TRANSLATION_FAULT: - gdb_send_error(connection, EFAULT); - break; - case ERROR_TARGET_UNALIGNED_ACCESS: - gdb_send_error(connection, EFAULT); - break; - default: - ERROR("BUG: unexpected error %i", retval); - exit(-1); - } - - return ERROR_OK; -} - -int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - char *separator; - u32 addr = 0; - u32 len = 0; - - u8 *buffer; - char *hex_buffer; - - int i; - int retval; - - /* skip command character */ - packet++; - - addr = strtoul(packet, &separator, 16); - - if (*separator != ',') - { - ERROR("incomplete read memory packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - len = strtoul(separator+1, NULL, 16); - - buffer = malloc(len); - - DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); - - switch (len) - { - case 4: - if ((addr % 4) == 0) - retval = target->type->read_memory(target, addr, 4, 1, buffer); - else - retval = target->type->read_memory(target, addr, 1, len, buffer); - break; - case 2: - if ((addr % 2) == 0) - retval = target->type->read_memory(target, addr, 2, 1, buffer); - else - retval = target->type->read_memory(target, addr, 1, len, buffer); - break; - default: - if (((addr % 4) == 0) && ((len % 4) == 0)) - retval = target->type->read_memory(target, addr, 4, len / 4, buffer); - else - retval = target->type->read_memory(target, addr, 1, len, buffer); - } - - if (retval == ERROR_OK) - { - hex_buffer = malloc(len * 2 + 1); - - for (i=0; itype->write_memory(target, addr, 4, 1, buffer); - else - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - case 2: - if ((addr % 2) == 0) - retval = target->type->write_memory(target, addr, 2, 1, buffer); - else - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - case 3: - case 1: - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - /* handle bulk writes */ - default: - retval = target_write_buffer(target, addr, len, buffer); - break; - } - - if (retval == ERROR_OK) - { - gdb_put_packet(connection, "OK", 2); - } - else - { - if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK) - return retval; - } - - free(buffer); - - return ERROR_OK; -} - -int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - char *separator; - u32 addr = 0; - u32 len = 0; - - u8 *buffer; - int retval; - - /* skip command character */ - packet++; - - addr = strtoul(packet, &separator, 16); - - if (*separator != ',') - { - ERROR("incomplete write memory binary packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - len = strtoul(separator+1, &separator, 16); - - if (*(separator++) != ':') - { - ERROR("incomplete write memory binary packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - retval = ERROR_OK; - if( len ) { - - buffer = malloc(len); - - DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); - - memcpy( buffer, separator, len ); - - switch (len) - { - case 4: - if ((addr % 4) == 0) - retval = target->type->write_memory(target, addr, 4, 1, buffer); - else - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - case 2: - if ((addr % 2) == 0) - retval = target->type->write_memory(target, addr, 2, 1, buffer); - else - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - case 3: - case 1: - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - default: - retval = target_write_buffer(target, addr, len, buffer); - break; - } - - free(buffer); - } - - if (retval == ERROR_OK) - { - gdb_put_packet(connection, "OK", 2); - } - else - { - if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK) - return retval; - } - - return ERROR_OK; -} - -void gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - int current = 0; - u32 address = 0x0; - - DEBUG("-"); - - if (packet_size > 1) - { - packet[packet_size] = 0; - address = strtoul(packet + 1, NULL, 16); - } - else - { - current = 1; - } - - if (packet[0] == 'c') - { - DEBUG("continue"); - target->type->resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */ - } - else if (packet[0] == 's') - { - DEBUG("step"); - target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */ - } -} - -int gdb_bp_wp_packet_error(connection_t *connection, int retval) -{ - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb tried to set a breakpoint but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - break; - case ERROR_TARGET_RESOURCE_NOT_AVAILABLE: - gdb_send_error(connection, EBUSY); - break; - default: - ERROR("BUG: unexpected error %i", retval); - exit(-1); - } - - return ERROR_OK; -} - -int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - int type; - enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */; - enum watchpoint_rw wp_type; - u32 address; - u32 size; - char *separator; - int retval; - - 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 (*separator != ',') - { - ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - address = strtoul(separator+1, &separator, 16); - - if (*separator != ',') - { - 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_bp_wp_packet_error(connection, retval)) != ERROR_OK) - return retval; - } - else - { - gdb_put_packet(connection, "OK", 2); - } - } - else - { - breakpoint_remove(target, address); - gdb_put_packet(connection, "OK", 2); - } - 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_bp_wp_packet_error(connection, retval)) != ERROR_OK) - return retval; - } - else - { - gdb_put_packet(connection, "OK", 2); - } - } - else - { - watchpoint_remove(target, address); - gdb_put_packet(connection, "OK", 2); - } - break; - } - default: - break; - } - - return ERROR_OK; -} - -void gdb_query_packet(connection_t *connection, char *packet, int packet_size) -{ - command_context_t *cmd_ctx = connection->cmd_ctx; - - 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++) - { - u32 tmp; - sscanf(packet + 6 + 2*i, "%2x", &tmp); - cmd[i] = tmp; - } - cmd[(packet_size - 6)/2] = 0x0; - command_run_line(cmd_ctx, cmd); - free(cmd); - } - gdb_put_packet(connection, "OK", 2); - return; - } - - gdb_put_packet(connection, "", 0); -} - -int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - gdb_connection_t *gdb_connection = connection->priv; - gdb_service_t *gdb_service = connection->service->priv; - int result; - - if (strstr(packet, "vFlashErase:")) - { - unsigned long addr; - unsigned long length; - char *parse = packet + 12; - if (*parse == '\0') - { - ERROR("incomplete vFlashErase packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - addr = strtoul(parse, &parse, 16); - - if (*(parse++) != ',' || *parse == '\0') - { - ERROR("incomplete vFlashErase packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - length = strtoul(parse, &parse, 16); - - if (*parse != '\0') - { - ERROR("incomplete vFlashErase packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - /* perform erase */ - if ((result = flash_erase(gdb_service->target, addr, length)) != ERROR_OK) - { - /* GDB doesn't evaluate the actual error number returned, - * treat a failed erase as an I/O error - */ - gdb_send_error(connection, EIO); - ERROR("flash_erase returned %i", result); - } - else - gdb_put_packet(connection, "OK", 2); - - return ERROR_OK; - } - - if (strstr(packet, "vFlashWrite:")) - { - unsigned long addr; - unsigned long length; - char *parse = packet + 12; - - if (*parse == '\0') - { - ERROR("incomplete vFlashErase packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - addr = strtoul(parse, &parse, 16); - if (*(parse++) != ':') - { - ERROR("incomplete vFlashErase packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - length = packet_size - (parse - packet); - - /* create a new image if there isn't already one */ - if (gdb_connection->vflash_image == NULL) - { - gdb_connection->vflash_image = malloc(sizeof(image_t)); - image_open(gdb_connection->vflash_image, "", "build"); - } - - /* create new section with content from packet buffer */ - image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (u8*)parse); - - gdb_put_packet(connection, "OK", 2); - - return ERROR_OK; - } - - if (!strcmp(packet, "vFlashDone")) - { - u32 written; - char *error_str; - - /* process the flashing buffer */ - if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, &error_str, NULL)) != ERROR_OK) - { - if (result == ERROR_FLASH_DST_OUT_OF_BANK) - gdb_put_packet(connection, "E.memtype", 9); - else - gdb_send_error(connection, EIO); - - if (error_str) - { - ERROR("flash writing failed: %s", error_str); - free(error_str); - } - } - else - { - DEBUG("wrote %u bytes from vFlash image to flash", written); - gdb_put_packet(connection, "OK", 2); - } - - image_close(gdb_connection->vflash_image); - free(gdb_connection->vflash_image); - gdb_connection->vflash_image = NULL; - - return ERROR_OK; - } - - gdb_put_packet(connection, "", 0); - return ERROR_OK; -} - -int gdb_input(connection_t *connection) -{ - gdb_service_t *gdb_service = connection->service->priv; - target_t *target = gdb_service->target; - char packet[GDB_BUFFER_SIZE]; - int packet_size; - int retval; - gdb_connection_t *gdb_con = connection->priv; - - /* drain input buffer */ - do - { - packet_size = GDB_BUFFER_SIZE-1; - if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK) - { - switch (retval) - { - case ERROR_GDB_BUFFER_TOO_SMALL: - ERROR("BUG: buffer supplied for gdb packet was too small"); - exit(-1); - case ERROR_SERVER_REMOTE_CLOSED: - return ERROR_SERVER_REMOTE_CLOSED; - default: - ERROR("BUG: unexpected error"); - exit(-1); - } - } - - /* terminate with zero */ - packet[packet_size] = 0; - - DEBUG("recevied packet: '%s'", packet); - - if (packet_size > 0) - { - retval = ERROR_OK; - switch (packet[0]) - { - case 'H': - /* Hct... -- set thread - * we don't have threads, send empty reply */ - gdb_put_packet(connection, NULL, 0); - break; - case 'q': - gdb_query_packet(connection, 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': - gdb_step_continue_packet(connection, target, packet, packet_size); - break; - case 'v': - retval = gdb_v_packet(connection, target, packet, packet_size); - break; - case 'D': - target->type->resume(target, 1, 0, 1, 0); - gdb_put_packet(connection, "OK", 2); - break; - case 'X': - if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK) - return retval; - break; - case 'k': - gdb_put_packet(connection, "OK", 2); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* ignore unkown packets */ - DEBUG("ignoring 0x%2.2x packet", packet[0]); - gdb_put_packet(connection, NULL, 0); - break; - } - - /* if a packet handler returned an error, exit input loop */ - if (retval != ERROR_OK) - return retval; - } - - if (gdb_con->ctrl_c) - { - if (target->state == TARGET_RUNNING) - { - target->type->halt(target); - gdb_con->ctrl_c = 0; - } - } - - } while (gdb_con->buf_cnt > 0); - - return ERROR_OK; -} - -int gdb_init() -{ - gdb_service_t *gdb_service; - target_t *target = targets; - int i = 0; - - if (!target) - { - WARNING("no gdb ports allocated as no target has been specified"); - return ERROR_OK; - } - - if (gdb_port == 0) - { - WARNING("no gdb port specified, using default port 3333"); - gdb_port = 3333; - } - - while (target) - { - char service_name[8]; - - snprintf(service_name, 8, "gdb-%2.2i", i); - - gdb_service = malloc(sizeof(gdb_service_t)); - gdb_service->target = target; - - add_service("gdb", CONNECTION_GDB, gdb_port + i, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service); - - DEBUG("gdb service for target %s at port %i", target->type->name, gdb_port + i); - - i++; - target = target->next; - } - - return ERROR_OK; -} - -/* 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) - 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 gdb_register_commands(command_context_t *command_context) -{ - register_command(command_context, NULL, "gdb_port", handle_gdb_port_command, - COMMAND_CONFIG, ""); - - return ERROR_OK; -} +/*************************************************************************** + * Copyright (C) 2005 by Dominic Rath * + * Dominic.Rath@gmx.de * + * * + * 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 "replacements.h" + +#include "gdb_server.h" + +#include "server.h" +#include "log.h" +#include "binarybuffer.h" +#include "jtag.h" +#include "breakpoints.h" +#include "flash.h" +#include "target_request.h" +#include "configuration.h" + +#include +#include +#include +#include + +#if 0 +#define _DEBUG_GDB_IO_ +#endif + +static unsigned short gdb_port; +static const char *DIGITS = "0123456789abcdef"; + +static void gdb_log_callback(void *priv, const char *file, int line, + const char *function, const char *format, va_list args); + +enum gdb_detach_mode +{ + GDB_DETACH_RESUME, + GDB_DETACH_RESET, + GDB_DETACH_HALT, + GDB_DETACH_NOTHING +}; + +/* target behaviour on gdb detach */ +enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME; + +/* set if we are sending a memory map to gdb + * via qXfer:memory-map:read packet */ +int gdb_use_memory_map = 0; +int gdb_flash_program = 0; + +/* 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: + ERROR("BUG: undefined debug reason"); + exit(-1); + } +} + +int gdb_get_char(connection_t *connection, int* next_char) +{ + gdb_connection_t *gdb_con = connection->priv; + +#ifdef _DEBUG_GDB_IO_ + char *debug_buffer; +#endif + + if (gdb_con->buf_cnt-- > 0) + { + *next_char = *(gdb_con->buf_p++); + if (gdb_con->buf_cnt > 0) + connection->input_pending = 1; + else + connection->input_pending = 0; + +#ifdef _DEBUG_GDB_IO_ + DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); +#endif + + return ERROR_OK; + } + + for (;;) + { +#ifndef _WIN32 + /* 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; + + FD_ZERO(&read_fds); + FD_SET(connection->fd, &read_fds); + + tv.tv_sec = 1; + tv.tv_usec = 0; + if (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 + */ + return ERROR_GDB_TIMEOUT; + } +#endif + 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: + return ERROR_SERVER_REMOTE_CLOSED; + case WSAECONNRESET: + return ERROR_SERVER_REMOTE_CLOSED; + default: + ERROR("read: %d", errno); + exit(-1); + } +#else + switch(errno) + { + case EAGAIN: + usleep(1000); + break; + case ECONNABORTED: + return ERROR_SERVER_REMOTE_CLOSED; + case ECONNRESET: + return ERROR_SERVER_REMOTE_CLOSED; + default: + ERROR("read: %s", strerror(errno)); + 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; + 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_ + DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); +#endif + + return ERROR_OK; +} + +int gdb_putback_char(connection_t *connection, int last_char) +{ + gdb_connection_t *gdb_con = connection->priv; + + if (gdb_con->buf_p > gdb_con->buffer) + { + *(--gdb_con->buf_p) = last_char; + gdb_con->buf_cnt++; + } + else + { + ERROR("BUG: couldn't put character back"); + } + + return ERROR_OK; +} + +/* 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 (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]; + + while (1) + { +#ifdef _DEBUG_GDB_IO_ + debug_buffer = malloc(len + 1); + memcpy(debug_buffer, buffer, len); + debug_buffer[len] = 0; + DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum); + free(debug_buffer); +#endif +#if 0 + char checksum[3]; + gdb_write(connection, "$", 1); + if (len > 0) + gdb_write(connection, buffer, len); + gdb_write(connection, "#", 1); + + snprintf(checksum, 3, "%2.2x", my_checksum); + + gdb_write(connection, checksum, 2); +#else + void *allocated = NULL; + char stackAlloc[1024]; + char *t = stackAlloc; + int totalLen = 1 + len + 1 + 2; + if (totalLen > sizeof(stackAlloc)) + { + allocated = malloc(totalLen); + t = allocated; + if (allocated == NULL) + { + ERROR("Ran out of memory trying to reply packet %d\n", totalLen); + exit(-1); + } + } + t[0] = '$'; + memcpy(t + 1, buffer, len); + t[1 + len] = '#'; + t[1 + len + 1] = DIGITS[(my_checksum >> 4) & 0xf]; + t[1 + len + 2] = DIGITS[my_checksum & 0xf]; + + gdb_write(connection, t, totalLen); + + if (allocated) + { + free(allocated); + } +#endif + if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK) + return retval; + + if (reply == '+') + break; + else if (reply == '-') + { + /* Stop sending output packets for now */ + log_remove_callback(gdb_log_callback, connection); + WARNING("negative reply, retrying"); + } + else if (reply == 0x3) + { + gdb_con->ctrl_c = 1; + if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK) + return retval; + if (reply == '+') + break; + else if (reply == '-') + { + /* Stop sending output packets for now */ + log_remove_callback(gdb_log_callback, connection); + WARNING("negative reply, retrying"); + } + else + { + ERROR("unknown character 0x%2.2x in reply, dropping connection", reply); + return ERROR_SERVER_REMOTE_CLOSED; + } + } + else + { + ERROR("unknown character 0x%2.2x in reply, dropping connection", reply); + return ERROR_SERVER_REMOTE_CLOSED; + } + } + if (gdb_con->closed) + return ERROR_SERVER_REMOTE_CLOSED; + + return ERROR_OK; +} + +int gdb_put_packet(connection_t *connection, char *buffer, int len) +{ + gdb_connection_t *gdb_con = connection->priv; + gdb_con->busy = 1; + int retval = gdb_put_packet_inner(connection, buffer, len); + gdb_con->busy = 0; + return retval; +} + +int gdb_get_packet_inner(connection_t *connection, char *buffer, int *len) +{ + int character; + int count = 0; + int retval; + char checksum[3]; + unsigned char my_checksum = 0; + gdb_connection_t *gdb_con = connection->priv; + + while (1) + { + do + { + if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) + return retval; + +#ifdef _DEBUG_GDB_IO_ + DEBUG("character: '%c'", character); +#endif + + switch (character) + { + case '$': + break; + case '+': + WARNING("acknowledgment received, but no packet pending"); + break; + case '-': + WARNING("negative acknowledgment, but no packet pending"); + break; + case 0x3: + gdb_con->ctrl_c = 1; + *len = 0; + return ERROR_OK; + default: + WARNING("ignoring character 0x%x", character); + break; + } + } while (character != '$'); + + my_checksum = 0; + + count = 0; + gdb_connection_t *gdb_con = connection->priv; + 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) + { + 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 (my_checksum == strtoul(checksum, NULL, 16)) + { + gdb_write(connection, "+", 1); + break; + } + + WARNING("checksum error, requesting retransmission"); + gdb_write(connection, "-", 1); + } + 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, char* line) +{ + char *hex_buffer; + int i, bin_size; + + bin_size = strlen(line); + + hex_buffer = malloc(bin_size*2 + 4); + + hex_buffer[0] = 'O'; + for (i=0; igdb_program_script) + { + script = open_file_from_path(cmd_ctx, target->gdb_program_script, "r"); + if (!script) + { + ERROR("couldn't open script file %s", target->gdb_program_script); + return ERROR_OK; + } + + INFO("executing gdb_program script '%s'", target->gdb_program_script); + command_run_file(cmd_ctx, script, COMMAND_EXEC); + fclose(script); + + jtag_execute_queue(); + } + + return ERROR_OK; +} + +int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv) +{ + connection_t *connection = priv; + gdb_connection_t *gdb_connection = connection->priv; + char sig_reply[4]; + int signal; + + switch (event) + { + case TARGET_EVENT_HALTED: + /* In the GDB protocol when we are stepping or coninuing execution, + * we have a lingering reply. Upon receiving a halted event + * when we have that lingering packet, we reply to the original + * step or continue packet. + * + * Executing monitor commands can bring the target in and + * out of the running state so we'll see lots of TARGET_EVENT_XXX + * that are to be ignored. + */ + if (gdb_connection->frontend_state == TARGET_RUNNING) + { + /* stop forwarding log packets! */ + log_remove_callback(gdb_log_callback, connection); + + if (gdb_connection->ctrl_c) + { + signal = 0x2; + gdb_connection->ctrl_c = 0; + } + else + { + signal = gdb_last_signal(target); + } + + snprintf(sig_reply, 4, "T%2.2x", signal); + gdb_put_packet(connection, sig_reply, 3); + gdb_connection->frontend_state = TARGET_HALTED; + } + break; + case TARGET_EVENT_GDB_PROGRAM: + gdb_program_handler(target, event, connection->cmd_ctx); + 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; + + /* output goes through gdb connection */ + command_set_output_handler(connection->cmd_ctx, gdb_output, connection); + + /* register callback to be informed about target events */ + target_register_event_callback(gdb_target_callback_event_handler, connection); + + /* a gdb session just attached, put the target in halt mode */ + if (((retval = gdb_service->target->type->halt(gdb_service->target)) != ERROR_OK) && + (retval != ERROR_TARGET_ALREADY_HALTED)) + { + ERROR("error(%d) when trying to halt target, falling back to \"reset halt\"", retval); + command_run_line(connection->cmd_ctx, "reset halt"); + } + + /* This will time out after 1 second */ + command_run_line(connection->cmd_ctx, "wait_halt 1"); + + /* remove the initial ACK from the incoming buffer */ + if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK) + return retval; + + if (initial_ack != '+') + gdb_putback_char(connection, initial_ack); + + return ERROR_OK; +} + +int gdb_connection_closed(connection_t *connection) +{ + gdb_service_t *gdb_service = connection->service->priv; + gdb_connection_t *gdb_connection = connection->priv; + + /* see if an image built with vFlash commands is left */ + if (gdb_connection->vflash_image) + { + image_close(gdb_connection->vflash_image); + free(gdb_connection->vflash_image); + gdb_connection->vflash_image = NULL; + } + + /* if this connection registered a debug-message receiver delete it */ + delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target); + + if (connection->priv) + { + free(connection->priv); + connection->priv = NULL; + } + else + { + ERROR("BUG: connection->priv == NULL"); + } + + target_unregister_event_callback(gdb_target_callback_event_handler, connection); + log_remove_callback(gdb_log_callback, connection); + + return ERROR_OK; +} + +void gdb_send_error(connection_t *connection, u8 the_error) +{ + char err[4]; + snprintf(err, 4, "E%2.2X", the_error ); + gdb_put_packet(connection, err, 3); +} + +int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size) +{ + char sig_reply[4]; + int signal; + + signal = gdb_last_signal(target); + + snprintf(sig_reply, 4, "S%2.2x", signal); + gdb_put_packet(connection, sig_reply, 3); + + return ERROR_OK; +} + +/* Convert register to string of bits. NB! The # of bits in the + * register might be non-divisible by 8(a byte), in which + * case an entire byte is shown. */ +void gdb_str_to_target(target_t *target, char *tstr, reg_t *reg) +{ + int i; + + u8 *buf; + int buf_len; + buf = reg->value; + buf_len = CEIL(reg->size, 8); + + if (target->endianness == TARGET_LITTLE_ENDIAN) + { + for (i = 0; i < buf_len; i++) + { + tstr[i*2] = DIGITS[(buf[i]>>4) & 0xf]; + tstr[i*2+1] = DIGITS[buf[i]&0xf]; + } + } + else + { + for (i = 0; i < buf_len; i++) + { + tstr[(buf_len-1-i)*2] = DIGITS[(buf[i]>>4)&0xf]; + tstr[(buf_len-1-i)*2+1] = DIGITS[buf[i]&0xf]; + } + } +} + +void gdb_target_to_str(target_t *target, char *tstr, char *str) +{ + int str_len = strlen(tstr); + int i; + + if (str_len % 2) + { + ERROR("BUG: gdb value with uneven number of characters encountered"); + exit(-1); + } + + if (target->endianness == TARGET_LITTLE_ENDIAN) + { + for (i = 0; i < str_len; i+=2) + { + str[str_len - i - 1] = tstr[i + 1]; + str[str_len - i - 2] = tstr[i]; + } + } + else + { + for (i = 0; i < str_len; i++) + { + str[i] = tstr[i]; + } + } +} + +int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size) +{ + reg_t **reg_list; + int reg_list_size; + int retval; + int reg_packet_size = 0; + char *reg_packet; + char *reg_packet_p; + int i; + +#ifdef _DEBUG_GDB_IO_ + DEBUG("-"); +#endif + + if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) + { + switch (retval) + { + case ERROR_TARGET_NOT_HALTED: + ERROR("gdb requested registers but we're not halted, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + default: + /* this is a bug condition - get_gdb_reg_list() may not return any other error */ + ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); + exit(-1); + } + } + + 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); + 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_ + DEBUG("-"); +#endif + + /* skip command character */ + packet++; + packet_size--; + + if (packet_size % 2) + { + WARNING("GDB set_registers packet with uneven characters received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } + + if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) + { + switch (retval) + { + case ERROR_TARGET_NOT_HALTED: + ERROR("gdb tried to registers but we're not halted, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + default: + /* this is a bug condition - get_gdb_reg_list() may not return any other error */ + ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); + exit(-1); + } + } + + packet_p = packet; + for (i = 0; i < reg_list_size; i++) + { + u8 *bin_buf; + char *hex_buf; + reg_arch_type_t *arch_type; + + /* convert from GDB-string (target-endian) to hex-string (big-endian) */ + hex_buf = malloc(CEIL(reg_list[i]->size, 8) * 2); + gdb_target_to_str(target, packet_p, hex_buf); + + /* convert hex-string to binary buffer */ + bin_buf = malloc(CEIL(reg_list[i]->size, 8)); + str_to_buf(hex_buf, CEIL(reg_list[i]->size, 8) * 2, bin_buf, reg_list[i]->size, 16); + + /* get register arch_type, and call set method */ + arch_type = register_get_arch_type(reg_list[i]->arch_type); + if (arch_type == NULL) + { + ERROR("BUG: encountered unregistered arch type"); + exit(-1); + } + arch_type->set(reg_list[i], bin_buf); + + /* advance packet pointer */ + packet_p += (CEIL(reg_list[i]->size, 8) * 2); + + free(bin_buf); + free(hex_buf); + } + + /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */ + free(reg_list); + + gdb_put_packet(connection, "OK", 2); + + return ERROR_OK; +} + +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_ + DEBUG("-"); +#endif + + if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) + { + switch (retval) + { + case ERROR_TARGET_NOT_HALTED: + ERROR("gdb requested registers but we're not halted, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + default: + /* this is a bug condition - get_gdb_reg_list() may not return any other error */ + ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); + exit(-1); + } + } + + if (reg_list_size <= reg_num) + { + ERROR("gdb requested a non-existing register"); + exit(-1); + } + + 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; + char *hex_buf; + u8 *bin_buf; + int reg_num = strtoul(packet + 1, &separator, 16); + reg_t **reg_list; + int reg_list_size; + int retval; + reg_arch_type_t *arch_type; + + DEBUG("-"); + + if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) + { + switch (retval) + { + case ERROR_TARGET_NOT_HALTED: + ERROR("gdb tried to set a register but we're not halted, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + default: + /* this is a bug condition - get_gdb_reg_list() may not return any other error */ + ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); + exit(-1); + } + } + + if (reg_list_size < reg_num) + { + ERROR("gdb requested a non-existing register"); + return ERROR_SERVER_REMOTE_CLOSED; + } + + if (*separator != '=') + { + ERROR("GDB 'set register packet', but no '=' following the register number"); + return ERROR_SERVER_REMOTE_CLOSED; + } + + /* convert from GDB-string (target-endian) to hex-string (big-endian) */ + hex_buf = malloc(CEIL(reg_list[reg_num]->size, 8) * 2); + gdb_target_to_str(target, separator + 1, hex_buf); + + /* convert hex-string to binary buffer */ + bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8)); + str_to_buf(hex_buf, CEIL(reg_list[reg_num]->size, 8) * 2, bin_buf, reg_list[reg_num]->size, 16); + + /* get register arch_type, and call set method */ + arch_type = register_get_arch_type(reg_list[reg_num]->arch_type); + if (arch_type == NULL) + { + ERROR("BUG: encountered unregistered arch type"); + exit(-1); + } + arch_type->set(reg_list[reg_num], bin_buf); + + gdb_put_packet(connection, "OK", 2); + + free(bin_buf); + free(hex_buf); + free(reg_list); + + return ERROR_OK; +} + +int gdb_memory_packet_error(connection_t *connection, int retval) +{ + switch (retval) + { + case ERROR_TARGET_NOT_HALTED: + ERROR("gdb tried to read memory but we're not halted, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + case ERROR_TARGET_DATA_ABORT: + gdb_send_error(connection, EIO); + break; + case ERROR_TARGET_TRANSLATION_FAULT: + gdb_send_error(connection, EFAULT); + break; + case ERROR_TARGET_UNALIGNED_ACCESS: + gdb_send_error(connection, EFAULT); + break; + default: + /* This could be that the target reset itself. */ + ERROR("unexpected error %i. Dropping connection.", retval); + return ERROR_SERVER_REMOTE_CLOSED; + } + + 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; + u32 addr = 0; + u32 len = 0; + + u8 *buffer; + char *hex_buffer; + + int retval = ERROR_OK; + + /* skip command character */ + packet++; + + addr = strtoul(packet, &separator, 16); + + if (*separator != ',') + { + ERROR("incomplete read memory packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } + + len = strtoul(separator+1, NULL, 16); + + buffer = malloc(len); + + DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); + + retval = target_read_buffer(target, addr, len, buffer); + + if ((retval == ERROR_TARGET_DATA_ABORT) && (!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); + + int i; + for (i = 0; i < len; i++) + { + u8 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_memory_packet_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; + u32 addr = 0; + u32 len = 0; + + u8 *buffer; + + int i; + int retval; + + /* skip command character */ + packet++; + + addr = strtoul(packet, &separator, 16); + + if (*separator != ',') + { + ERROR("incomplete write memory packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } + + len = strtoul(separator+1, &separator, 16); + + if (*(separator++) != ':') + { + ERROR("incomplete write memory packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } + + buffer = malloc(len); + + DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); + + for (i=0; i 1) + { + packet[packet_size] = 0; + address = strtoul(packet + 1, NULL, 16); + } + else + { + current = 1; + } + + if (packet[0] == 'c') + { + DEBUG("continue"); + target->type->resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */ + } + else if (packet[0] == 's') + { + DEBUG("step"); + target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */ + } +} + +int gdb_bp_wp_packet_error(connection_t *connection, int retval) +{ + switch (retval) + { + case ERROR_TARGET_NOT_HALTED: + ERROR("gdb tried to set a breakpoint but we're not halted, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + break; + case ERROR_TARGET_RESOURCE_NOT_AVAILABLE: + gdb_send_error(connection, EBUSY); + break; + default: + ERROR("BUG: unexpected error %i", retval); + exit(-1); + } + + return ERROR_OK; +} + +int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +{ + int type; + enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */; + enum watchpoint_rw wp_type; + u32 address; + u32 size; + char *separator; + int retval; + + 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 (*separator != ',') + { + ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } + + address = strtoul(separator+1, &separator, 16); + + if (*separator != ',') + { + 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_bp_wp_packet_error(connection, retval)) != ERROR_OK) + return retval; + } + else + { + gdb_put_packet(connection, "OK", 2); + } + } + else + { + breakpoint_remove(target, address); + gdb_put_packet(connection, "OK", 2); + } + 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_bp_wp_packet_error(connection, retval)) != ERROR_OK) + return retval; + } + else + { + gdb_put_packet(connection, "OK", 2); + } + } + else + { + watchpoint_remove(target, address); + gdb_put_packet(connection, "OK", 2); + } + 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) +{ + int i; + int block_size = 0xffffffff; + + /* loop through all sectors and return smallest sector size */ + + for (i = 0; i < bank->num_sectors; i++) + { + if (bank->sectors[i].size < block_size) + block_size = bank->sectors[i].size; + } + + return block_size; +} + +int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +{ + command_context_t *cmd_ctx = connection->cmd_ctx; + + if (strstr(packet, "qRcmd,")) + { + if (packet_size > 6) + { + char *cmd; + int i; + cmd = malloc((packet_size - 6)/2 + 1); + for (i=0; i < (packet_size - 6)/2; i++) + { + u32 tmp; + sscanf(packet + 6 + 2*i, "%2x", &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(); + command_run_line(cmd_ctx, cmd); + 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; + u32 checksum; + u32 addr = 0; + u32 len = 0; + + /* skip command character */ + packet += 5; + + addr = strtoul(packet, &separator, 16); + + if (*separator != ',') + { + ERROR("incomplete read memory packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } + + len = strtoul(separator + 1, NULL, 16); + + retval = target_checksum_memory(target, addr, len, &checksum); + + if (retval == ERROR_OK) + { + snprintf(gdb_reply, 10, "C%8.8x", checksum); + gdb_put_packet(connection, gdb_reply, 9); + } + else + { + if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK) + return retval; + } + + return ERROR_OK; + } + } + else if (strstr(packet, "qSupported")) + { + /* we currently support packet size and qXfer:memory-map:read (if enabled) + * disable qXfer:features:read for the moment */ + int retval = ERROR_OK; + char *buffer = NULL; + int pos = 0; + int size = 0; + + xml_printf(&retval, &buffer, &pos, &size, + "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-", + (GDB_BUFFER_SIZE - 1), gdb_use_memory_map == 1 ? '+' : '-'); + + if (retval != ERROR_OK) + { + gdb_send_error(connection, 01); + return ERROR_OK; + } + + gdb_put_packet(connection, buffer, strlen(buffer)); + free(buffer); + + return ERROR_OK; + } + else if (strstr(packet, "qXfer:memory-map:read::")) + { + /* We get away with only specifying flash here. Regions that are not + * specified are treated as if we provided no memory map(if not we + * could detect the holes and mark them as RAM). + * Normally we only execute this code once, but no big deal if we + * have to regenerate it a couple of times. */ + + flash_bank_t *p; + char *xml = NULL; + int size = 0; + int pos = 0; + int retval = ERROR_OK; + + int offset; + int length; + char *separator; + int blocksize; + + /* skip command character */ + packet += 23; + + offset = strtoul(packet, &separator, 16); + length = strtoul(separator + 1, &separator, 16); + + xml_printf(&retval, &xml, &pos, &size, "\n"); + + int i = 0; + for (;;) + { + p = get_flash_bank_by_num(i); + if (p == NULL) + break; + + /* if device has uneven sector sizes, eg. str7, lpc + * we pass the smallest sector size to gdb memory map */ + blocksize = gdb_calc_blocksize(p); + + xml_printf(&retval, &xml, &pos, &size, "\n" \ + "0x%x\n" \ + "\n", \ + p->base, p->size, blocksize); + i++; + } + + xml_printf(&retval, &xml, &pos, &size, "\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\narm\n\n"); + + if (retval != ERROR_OK) + { + gdb_send_error(connection, retval); + return retval; + } + + gdb_put_packet(connection, xml, strlen(xml) + 1); + + free(xml); + return ERROR_OK; + } + + gdb_put_packet(connection, "", 0); + return ERROR_OK; +} + +int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +{ + gdb_connection_t *gdb_connection = connection->priv; + gdb_service_t *gdb_service = connection->service->priv; + int result; + + /* if flash programming disabled - send a empty reply */ + + if (gdb_flash_program == 0) + { + gdb_put_packet(connection, "", 0); + return ERROR_OK; + } + + if (strstr(packet, "vFlashErase:")) + { + unsigned long addr; + unsigned long length; + + char *parse = packet + 12; + if (*parse == '\0') + { + ERROR("incomplete vFlashErase packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } + + addr = strtoul(parse, &parse, 16); + + if (*(parse++) != ',' || *parse == '\0') + { + ERROR("incomplete vFlashErase packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } + + length = strtoul(parse, &parse, 16); + + if (*parse != '\0') + { + ERROR("incomplete vFlashErase packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } + + /* assume all sectors need erasing - stops any problems + * when flash_write is called multiple times */ + flash_set_dirty(); + + /* perform any target specific operations before the erase */ + target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_PROGRAM); + + /* perform erase */ + if ((result = flash_erase_address_range(gdb_service->target, addr, length)) != ERROR_OK) + { + /* GDB doesn't evaluate the actual error number returned, + * treat a failed erase as an I/O error + */ + gdb_send_error(connection, EIO); + ERROR("flash_erase returned %i", result); + } + else + gdb_put_packet(connection, "OK", 2); + + return ERROR_OK; + } + + if (strstr(packet, "vFlashWrite:")) + { + unsigned long addr; + unsigned long length; + char *parse = packet + 12; + + if (*parse == '\0') + { + ERROR("incomplete vFlashErase packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } + addr = strtoul(parse, &parse, 16); + if (*(parse++) != ':') + { + ERROR("incomplete vFlashErase packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } + length = packet_size - (parse - packet); + + /* create a new image if there isn't already one */ + if (gdb_connection->vflash_image == NULL) + { + gdb_connection->vflash_image = malloc(sizeof(image_t)); + image_open(gdb_connection->vflash_image, "", "build"); + } + + /* create new section with content from packet buffer */ + image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (u8*)parse); + + gdb_put_packet(connection, "OK", 2); + + return ERROR_OK; + } + + if (!strcmp(packet, "vFlashDone")) + { + u32 written; + + /* process the flashing buffer. No need to erase as GDB + * always issues a vFlashErase first. */ + if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0)) != ERROR_OK) + { + if (result == ERROR_FLASH_DST_OUT_OF_BANK) + gdb_put_packet(connection, "E.memtype", 9); + else + gdb_send_error(connection, EIO); + } + else + { + DEBUG("wrote %u bytes from vFlash image to flash", written); + gdb_put_packet(connection, "OK", 2); + } + + image_close(gdb_connection->vflash_image); + free(gdb_connection->vflash_image); + gdb_connection->vflash_image = NULL; + + return ERROR_OK; + } + + gdb_put_packet(connection, "", 0); + return ERROR_OK; +} + +int gdb_detach(connection_t *connection, target_t *target) +{ + switch( detach_mode ) + { + case GDB_DETACH_RESUME: + target->type->resume(target, 1, 0, 1, 0); + break; + + case GDB_DETACH_RESET: + target_process_reset(connection->cmd_ctx); + break; + + case GDB_DETACH_HALT: + target->type->halt(target); + break; + + case GDB_DETACH_NOTHING: + break; + } + + gdb_put_packet(connection, "OK", 2); + + return ERROR_OK; +} + +static void gdb_log_callback(void *priv, const char *file, int line, + const char *function, const char *format, va_list args) +{ + connection_t *connection = priv; + gdb_connection_t *gdb_con = connection->priv; + + if (gdb_con->busy) + { + /* do not reply this using the O packet */ + return; + } + + char *t = alloc_printf(format, args); + if (t == NULL) + return; + + gdb_output_con(connection, t); + + free(t); +} + +int gdb_input_inner(connection_t *connection) +{ + gdb_service_t *gdb_service = connection->service->priv; + target_t *target = gdb_service->target; + char packet[GDB_BUFFER_SIZE]; + 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; + + 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': + 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': + { + /* 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); + gdb_step_continue_packet(connection, target, packet, packet_size); + } + 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 */ + target_process_reset(connection->cmd_ctx); + break; + default: + /* ignore unkown packets */ + DEBUG("ignoring 0x%2.2x packet", packet[0]); + gdb_put_packet(connection, NULL, 0); + break; + } + + /* if a packet handler returned an error, exit input loop */ + if (retval != ERROR_OK) + return retval; + } + + if (gdb_con->ctrl_c) + { + if (target->state == TARGET_RUNNING) + { + target->type->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); + if (retval == ERROR_SERVER_REMOTE_CLOSED) + return retval; + /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */ + return ERROR_OK; +} + +int gdb_init() +{ + gdb_service_t *gdb_service; + target_t *target = targets; + int i = 0; + + if (!target) + { + WARNING("no gdb ports allocated as no target has been specified"); + return ERROR_OK; + } + + if (gdb_port == 0) + { + WARNING("no gdb port specified, using default port 3333"); + gdb_port = 3333; + } + + while (target) + { + char service_name[8]; + + snprintf(service_name, 8, "gdb-%2.2i", i); + + gdb_service = malloc(sizeof(gdb_service_t)); + gdb_service->target = target; + + add_service("gdb", CONNECTION_GDB, gdb_port + i, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service); + + DEBUG("gdb service for target %s at port %i", target->type->name, gdb_port + i); + + i++; + target = target->next; + } + + return ERROR_OK; +} + +/* 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) + 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; + } + } + + WARNING("invalid gdb_detach configuration directive: %s", args[0]); + return ERROR_OK; +} + +int handle_gdb_memory_map_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) +{ + if (argc == 1) + { + if (strcmp(args[0], "enable") == 0) + { + gdb_use_memory_map = 1; + return ERROR_OK; + } + else if (strcmp(args[0], "disable") == 0) + { + gdb_use_memory_map = 0; + return ERROR_OK; + } + } + + WARNING("invalid gdb_memory_map configuration directive: %s", args[0]); + return ERROR_OK; +} + +int handle_gdb_flash_program_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) +{ + if (argc == 1) + { + if (strcmp(args[0], "enable") == 0) + { + gdb_flash_program = 1; + return ERROR_OK; + } + else if (strcmp(args[0], "disable") == 0) + { + gdb_flash_program = 0; + return ERROR_OK; + } + } + + WARNING("invalid gdb_memory_map configuration directive: %s", args[0]); + return ERROR_OK; +} + +int 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; + } + } + + WARNING("invalid gdb_report_data_abort configuration directive: %s", args[0]); + return ERROR_OK; +} + +int gdb_register_commands(command_context_t *command_context) +{ + register_command(command_context, NULL, "gdb_port", handle_gdb_port_command, + COMMAND_CONFIG, ""); + register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command, + COMMAND_CONFIG, ""); + register_command(command_context, NULL, "gdb_memory_map", handle_gdb_memory_map_command, + COMMAND_CONFIG, ""); + register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command, + COMMAND_CONFIG, ""); + register_command(command_context, NULL, "gdb_report_data_abort", handle_gdb_report_data_abort_command, + COMMAND_CONFIG, ""); + return ERROR_OK; +}