diff options
Diffstat (limited to 'src/server/gdb_server.c')
| -rw-r--r-- | src/server/gdb_server.c | 1108 |
1 files changed, 1108 insertions, 0 deletions
diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c new file mode 100644 index 00000000..125206dc --- /dev/null +++ b/src/server/gdb_server.c @@ -0,0 +1,1108 @@ +/*************************************************************************** + * 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. * + ***************************************************************************/ +#include "gdb_server.h" + +#include "server.h" +#include "log.h" +#include "binarybuffer.h" +#include "breakpoints.h" + +#define __USE_GNU +#include <string.h> +#include <errno.h> +#include <unistd.h> +#include <stdlib.h> + +// -ino: 060521-1116 +#ifdef __FreeBSD__ +#include <stdio.h> +char * strndup(char * str, int n) { + unsigned char * tmp = malloc((size_t)n+1); + if (! tmp) perror("gdb_server malloc failed"); + if (strlcpy(tmp, str, n) > n) perror("gdb_server strndup: too long"); + return tmp; +} +#endif +#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(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE)) <= 0) + { + if (gdb_con->buf_cnt == 0) + return ERROR_SERVER_REMOTE_CLOSED; + + 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); + } + } + + 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_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 '$%s#%2.2x'", debug_buffer, my_checksum); + free(debug_buffer); + + write(connection->fd, "$", 1); + if (len > 0) + write(connection->fd, buffer, len); + write(connection->fd, "#", 1); + + snprintf(checksum, 3, "%2.2x", my_checksum); + + write(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; + int first_char = 0; + int packet_type; + 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; + + 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( !first_char ) { + packet_type = character; + first_char = 1; + } + + if( packet_type == 'X' ) + { + switch (character) + { + case '#': + break; + case 0x7d: + /* data transmitted in binary mode (X packet) + * uses 0x7d as escape character */ + my_checksum += character & 0xff; + gdb_get_char(connection, &character); + my_checksum += character & 0xff; + buffer[count++] = (character ^ 0x20) & 0xff; + if (count > *len) + { + ERROR("packet buffer too small"); + return ERROR_GDB_BUFFER_TOO_SMALL; + } + break; + default: + buffer[count++] = character & 0xff; + my_checksum += character & 0xff; + if (count > *len) + { + ERROR("packet buffer too small"); + return ERROR_GDB_BUFFER_TOO_SMALL; + } + break; + } + } + else + { + switch (character) + { + case '#': + break; + case 0x3: + gdb_con->ctrl_c = 1; + break; + default: + buffer[count++] = character & 0xff; + my_checksum += character & 0xff; + if (count > *len) + { + ERROR("packet buffer too small"); + return ERROR_GDB_BUFFER_TOO_SMALL; + } + break; + } + } + } while (character != '#'); + + *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 (connection->fd, "+", 1); + break; + } + + WARNING("checksum error, requesting retransmission"); + write(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; i<bin_size; i++) + snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]); + hex_buffer[bin_size*2+1] = '0'; + hex_buffer[bin_size*2+2] = 'a'; + hex_buffer[bin_size*2+3] = 0x0; + + gdb_put_packet(connection, hex_buffer, bin_size*2 + 3); + + free(hex_buffer); + return ERROR_OK; +} + +int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv) +{ + connection_t *connection = priv; + gdb_connection_t *gdb_connection = connection->priv; + char sig_reply[4]; + int signal; + + switch (event) + { + case TARGET_EVENT_HALTED: + if (gdb_connection->frontend_state == TARGET_RUNNING) + { + 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; + + /* 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; + + return ERROR_OK; +} + +int gdb_connection_closed(connection_t *connection) +{ + 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; +} + +int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size) +{ + char sig_reply[4]; + int signal; + + signal = gdb_last_signal(target); + + snprintf(sig_reply, 4, "S%2.2x", signal); + gdb_put_packet(connection, sig_reply, 3); + + return ERROR_OK; +} + +void gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size) +{ + 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"); + exit(-1); + default: + 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++) + { + int j; + char *hex_buf = buf_to_char(reg_list[i]->value, reg_list[i]->size); + DEBUG("hex_buf: %s", hex_buf); + for (j = CEIL(reg_list[i]->size, 8) * 2; j > 0; j -= 2) + { + *reg_packet_p++ = hex_buf[j - 2]; + *reg_packet_p++ = hex_buf[j - 1]; + } + 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); + +} + +void 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"); + return; + } + + if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) + { + switch (retval) + { + case ERROR_TARGET_NOT_HALTED: + ERROR("gdb requested registers, but we're not halted"); + exit(-1); + default: + ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); + exit(-1); + } + } + + packet_p = packet; + for (i = 0; i < reg_list_size; i++) + { + char_to_buf(packet, CEIL(reg_list[i]->size, 8) * 2, reg_list[i]->value, reg_list[i]->size); + reg_list[i]->dirty = 1; + } + + gdb_put_packet(connection, "OK", 2); +} + +void gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +{ + char *hex_buf; + char *reg_packet; + char *reg_packet_p; + int reg_num = strtoul(packet + 1, NULL, 16); + reg_t **reg_list; + int reg_list_size; + int retval; + int i; + + DEBUG(""); + + if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) + { + switch (retval) + { + case ERROR_TARGET_NOT_HALTED: + ERROR("gdb requested registers, but we're not halted"); + exit(-1); + default: + ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); + exit(-1); + } + } + + if (reg_list_size <= reg_num) + { + ERROR("gdb requested a non-existing register"); + exit(-1); + } + + hex_buf = buf_to_char(reg_list[reg_num]->value, reg_list[reg_num]->size); + reg_packet = reg_packet_p = malloc(CEIL(reg_list[reg_num]->size, 8) * 2); + + for (i = CEIL(reg_list[reg_num]->size, 8) * 2; i > 0; i -= 2) + { + *reg_packet_p++ = hex_buf[i - 2]; + *reg_packet_p++ = hex_buf[i - 1]; + } + + gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2); + + free(reg_packet); + free(hex_buf); + +} + +void gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +{ + char *separator; + int reg_num = strtoul(packet + 1, &separator, 16); + reg_t **reg_list; + int reg_list_size; + int retval; + + DEBUG(""); + + if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) + { + switch (retval) + { + case ERROR_TARGET_NOT_HALTED: + ERROR("gdb requested registers, but we're not halted"); + exit(-1); + default: + 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); + } + + if (*separator != '=') + { + ERROR("GDB set register packet, but no '=' following the register number"); + exit(-1); + } + + char_to_buf(separator + 1, CEIL(reg_list[reg_num]->size, 8) * 2, reg_list[reg_num]->value, reg_list[reg_num]->size); + reg_list[reg_num]->dirty = 1; + + gdb_put_packet(connection, "OK", 2); + +} + +void 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; + + /* skip command character */ + packet++; + + addr = strtoul(packet, &separator, 16); + + if (*separator != ',') + return; + + 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) + target->type->read_memory(target, addr, 4, 1, buffer); + else + target->type->read_memory(target, addr, 1, len, buffer); + break; + case 2: + if ((addr % 2) == 0) + target->type->read_memory(target, addr, 2, 1, buffer); + else + target->type->read_memory(target, addr, 1, len, buffer); + break; + default: + if (((addr % 4) == 0) && ((len % 4) == 0)) + target->type->read_memory(target, addr, 4, len / 4, buffer); + else + target->type->read_memory(target, addr, 1, len, buffer); + } + + hex_buffer = malloc(len * 2 + 1); + + for (i=0; i<len; i++) + snprintf(hex_buffer + 2*i, 3, "%2.2x", buffer[i]); + + gdb_put_packet(connection, hex_buffer, len * 2); + + free(hex_buffer); + free(buffer); +} + +void 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; + + /* skip command character */ + packet++; + + addr = strtoul(packet, &separator, 16); + + if (*separator != ',') + return; + + len = strtoul(separator+1, &separator, 16); + + if (*(separator++) != ':') + return; + + buffer = malloc(len); + + DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); + + for (i=0; i<len; i++) + { + u32 tmp; + sscanf(separator + 2*i, "%2x", &tmp); + buffer[i] = tmp; + } + + switch (len) + { + /* handle sized writes */ + case 4: + if ((addr % 4) == 0) + target->type->write_memory(target, addr, 4, 1, buffer); + else + target->type->write_memory(target, addr, 1, len, buffer); + break; + case 2: + if ((addr % 2) == 0) + target->type->write_memory(target, addr, 2, 1, buffer); + else + target->type->write_memory(target, addr, 1, len, buffer); + break; + case 3: + case 1: + target->type->write_memory(target, addr, 1, len, buffer); + break; + /* handle bulk writes */ + default: + target_write_buffer(target, addr, len, buffer); + break; + } + + gdb_put_packet(connection, "OK", 2); + + free(buffer); +} + +void 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; + + /* skip command character */ + packet++; + + addr = strtoul(packet, &separator, 16); + + if (*separator != ',') + return; + + len = strtoul(separator+1, &separator, 16); + + if (*(separator++) != ':') + return; + + if( len ) { + + buffer = malloc(len); + + DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); + + memcpy( buffer, separator, len ); + + switch (len) + { + case 4: + if ((addr % 4) == 0) + target->type->write_memory(target, addr, 4, 1, buffer); + else + target->type->write_memory(target, addr, 1, len, buffer); + break; + case 2: + if ((addr % 2) == 0) + target->type->write_memory(target, addr, 2, 1, buffer); + else + target->type->write_memory(target, addr, 1, len, buffer); + break; + case 3: + case 1: + target->type->write_memory(target, addr, 1, len, buffer); + break; + default: + target_write_buffer(target, addr, len, buffer); + break; + } + + free(buffer); + } + + gdb_put_packet(connection, "OK", 2); +} + +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) + { + u32 address = 0; + 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 */ + } +} + +void gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +{ + int type; + enum breakpoint_type bp_type; + 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 != ',') + return; + + address = strtoul(separator+1, &separator, 16); + + if (*separator != ',') + return; + + 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 == ERROR_TARGET_RESOURCE_NOT_AVAILABLE) + { + gdb_put_packet(connection, "E00", 3); + break; + } + } + } + else + { + breakpoint_remove(target, address); + } + gdb_put_packet(connection, "OK", 2); + break; + case 2: + case 3: + case 4: + { + if (packet[0] == 'Z') + watchpoint_add(target, address, size, type-2, 0, 0xffffffffu); + else + watchpoint_remove(target, address); + gdb_put_packet(connection, "OK", 2); + break; + } + default: + break; + } + +} + +void gdb_query_packet(connection_t *connection, char *packet, int packet_size) +{ + command_context_t *cmd_ctx = connection->cmd_ctx; + gdb_service_t *gdb_service = connection->service->priv; + target_t *target = gdb_service->target; + + if (strstr(packet, "qRcmd,")) + { + 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_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("unexpected error"); + exit(-1); + } + } + + /* terminate with zero */ + packet[packet_size] = 0; + + DEBUG("recevied packet: '%s'", packet); + + if (packet_size > 0) + { + 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': + gdb_get_registers_packet(connection, target, packet, packet_size); + break; + case 'G': + gdb_set_registers_packet(connection, target, packet, packet_size); + break; + case 'p': + gdb_get_register_packet(connection, target, packet, packet_size); + break; + case 'P': + gdb_set_register_packet(connection, target, packet, packet_size); + break; + case 'm': + gdb_read_memory_packet(connection, target, packet, packet_size); + break; + case 'M': + gdb_write_memory_packet(connection, target, packet, packet_size); + break; + case 'z': + case 'Z': + 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 'D': + target->type->resume(target, 1, 0, 1, 0); + gdb_put_packet(connection, "OK", 2); + break; + case 'X': + gdb_write_memory_binary_packet(connection, target, packet, packet_size); + 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 (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); + + 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; +} |