X-Git-Url: https://review.openocd.org/gitweb?a=blobdiff_plain;f=src%2Fserver%2Fgdb_server.c;h=175e06740e9c75b89bb031116d2fe1dcb19d9e2b;hb=e27696f6b04459e935a0a5f65f7f668cb02970dd;hp=b0c0996119031af4590862443b08d5c69bd5f3da;hpb=d4d36b0a9a778caec77fb8e4ce5b1e406d5a8f50;p=openocd.git diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c index b0c0996119..175e06740e 100644 --- a/src/server/gdb_server.c +++ b/src/server/gdb_server.c @@ -17,7 +17,11 @@ * 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" @@ -25,6 +29,8 @@ #include "log.h" #include "binarybuffer.h" #include "breakpoints.h" +#include "flash.h" +#include "target_request.h" #define __USE_GNU #include @@ -32,27 +38,22 @@ #include #include -#ifndef HAVE_STRNDUP -#include -char* strndup(const char *s, size_t n) -{ - size_t len = strnlen (s, n); - char *new = (char *) malloc (len + 1); - - if (new == NULL) - return NULL; - - new[len] = '\0'; - return (char *) memcpy (new, s, len); -} -#endif - #if 0 #define _DEBUG_GDB_IO_ #endif static unsigned short gdb_port; +enum gdb_detach_mode +{ + GDB_DETACH_RESUME, + GDB_DETACH_RESET, + GDB_DETACH_HALT, + GDB_DETACH_NOTHING +}; + +enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME; + int gdb_last_signal(target_t *target) { switch (target->debug_reason) @@ -77,7 +78,7 @@ 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++); @@ -85,19 +86,34 @@ int gdb_get_char(connection_t *connection, int* next_char) 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) + 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: @@ -111,8 +127,9 @@ int gdb_get_char(connection_t *connection, int* next_char) 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; @@ -127,9 +144,26 @@ int gdb_get_char(connection_t *connection, int* next_char) else connection->input_pending = 0; #ifdef _DEBUG_GDB_IO_ - DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); + DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); #endif - + + return ERROR_OK; +} + +int gdb_putback_char(connection_t *connection, int last_char) +{ + gdb_connection_t *gdb_con = connection->priv; + + if (gdb_con->buf_p > gdb_con->buffer) + { + *(--gdb_con->buf_p) = last_char; + gdb_con->buf_cnt++; + } + else + { + ERROR("BUG: couldn't put character back"); + } + return ERROR_OK; } @@ -145,24 +179,23 @@ int gdb_put_packet(connection_t *connection, char *buffer, int len) 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); + + write_socket(connection->fd, "$", 1); if (len > 0) - write(connection->fd, buffer, len); - write(connection->fd, "#", 1); - + write_socket(connection->fd, buffer, len); + write_socket(connection->fd, "#", 1); + snprintf(checksum, 3, "%2.2x", my_checksum); - - write(connection->fd, checksum, 2); + + write_socket(connection->fd, checksum, 2); if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK) return retval; @@ -192,7 +225,7 @@ int gdb_put_packet(connection_t *connection, char *buffer, int len) return ERROR_SERVER_REMOTE_CLOSED; } } - + return ERROR_OK; } @@ -201,8 +234,6 @@ int gdb_get_packet(connection_t *connection, char *buffer, int *len) int character; int count = 0; int retval; - int first_char = 0; - int packet_type; char checksum[3]; unsigned char my_checksum = 0; gdb_connection_t *gdb_con = connection->priv; @@ -214,6 +245,8 @@ int gdb_get_packet(connection_t *connection, char *buffer, int *len) if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) return retval; + DEBUG("character: '%c'", character); + switch (character) { case '$': @@ -235,71 +268,39 @@ int gdb_get_packet(connection_t *connection, char *buffer, int *len) } 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' ) + + if (character == '#') break; + + if (character == '}') { - 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; - } + /* data transmitted in binary mode (X packet) + * uses 0x7d as escape character */ + my_checksum += character & 0xff; + if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) + return retval; + my_checksum += character & 0xff; + buffer[count++] = (character ^ 0x20) & 0xff; } else { - switch (character) - { - case '#': - break; - case 0x3: - gdb_con->ctrl_c = 1; - break; - default: - buffer[count++] = character & 0xff; - my_checksum += character & 0xff; - if (count > *len) - { - ERROR("packet buffer too small"); - return ERROR_GDB_BUFFER_TOO_SMALL; - } - break; - } + my_checksum += character & 0xff; + buffer[count++] = character & 0xff; + } + + if (count > *len) + { + ERROR("packet buffer too small"); + return ERROR_GDB_BUFFER_TOO_SMALL; } - } while (character != '#'); + } while (1); *len = count; - + if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) return retval; checksum[0] = character; @@ -307,15 +308,15 @@ int gdb_get_packet(connection_t *connection, char *buffer, int *len) return retval; checksum[1] = character; checksum[2] = 0; - + if (my_checksum == strtoul(checksum, NULL, 16)) { - write (connection->fd, "+", 1); + write_socket(connection->fd, "+", 1); break; } WARNING("checksum error, requesting retransmission"); - write(connection->fd, "-", 1); + write_socket(connection->fd, "-", 1); } return ERROR_OK; @@ -328,7 +329,7 @@ int gdb_output(struct command_context_s *context, char* line) int i, bin_size; bin_size = strlen(line); - + hex_buffer = malloc(bin_size*2 + 4); hex_buffer[0] = 'O'; @@ -350,7 +351,7 @@ int gdb_target_callback_event_handler(struct target_s *target, enum target_event gdb_connection_t *gdb_connection = connection->priv; char sig_reply[4]; int signal; - + switch (event) { case TARGET_EVENT_HALTED: @@ -365,7 +366,7 @@ int gdb_target_callback_event_handler(struct target_s *target, enum target_event { 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; @@ -390,67 +391,148 @@ int gdb_new_connection(connection_t *connection) 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)) + (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_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size) +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; @@ -459,17 +541,18 @@ void gdb_get_registers_packet(connection_t *connection, target_t *target, char* char *reg_packet; char *reg_packet_p; int i; - - DEBUG(""); + + 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); + 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); } @@ -479,41 +562,40 @@ void gdb_get_registers_packet(connection_t *connection, target_t *target, char* { 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); + char *hex_buf = buf_to_str(reg_list[i]->value, reg_list[i]->size, 16); 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]; - } + 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; } -void gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +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(""); + + DEBUG("-"); /* skip command character */ packet++; @@ -521,8 +603,8 @@ void gdb_set_registers_packet(connection_t *connection, target_t *target, char * if (packet_size % 2) { - WARNING("GDB set_registers packet with uneven characters received"); - return; + 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) @@ -530,9 +612,10 @@ void gdb_set_registers_packet(connection_t *connection, target_t *target, char * switch (retval) { case ERROR_TARGET_NOT_HALTED: - ERROR("gdb requested registers, but we're not halted"); - exit(-1); + 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); } @@ -541,104 +624,179 @@ void gdb_set_registers_packet(connection_t *connection, target_t *target, char * 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; + 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; } -void gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +int 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(""); - + 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"); - exit(-1); + 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); } - 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]; - } - + 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; } -void gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +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("-"); - 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); + 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"); - exit(-1); + return ERROR_SERVER_REMOTE_CLOSED; } if (*separator != '=') { - ERROR("GDB set register packet, but no '=' following the register number"); + 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); } - - 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; + 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; } -void gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size) { char *separator; u32 addr = 0; @@ -648,14 +806,18 @@ void gdb_read_memory_packet(connection_t *connection, target_t *target, char *pa char *hex_buffer; int i; + int retval; /* skip command character */ packet++; addr = strtoul(packet, &separator, 16); - + if (*separator != ',') - return; + { + ERROR("incomplete read memory packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } len = strtoul(separator+1, NULL, 16); @@ -667,35 +829,46 @@ void gdb_read_memory_packet(connection_t *connection, target_t *target, char *pa { case 4: if ((addr % 4) == 0) - target->type->read_memory(target, addr, 4, 1, buffer); + retval = target->type->read_memory(target, addr, 4, 1, buffer); else - target->type->read_memory(target, addr, 1, len, buffer); + retval = 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); + retval = target->type->read_memory(target, addr, 2, 1, buffer); else - target->type->read_memory(target, addr, 1, len, buffer); + retval = 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); + retval = target->type->read_memory(target, addr, 4, len / 4, buffer); else - target->type->read_memory(target, addr, 1, len, buffer); + retval = target->type->read_memory(target, addr, 1, len, buffer); } - hex_buffer = malloc(len * 2 + 1); - - for (i=0; itype->write_memory(target, addr, 4, 1, buffer); + retval = target->type->write_memory(target, addr, 4, 1, buffer); else - target->type->write_memory(target, addr, 1, len, buffer); + retval = 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); + retval = target->type->write_memory(target, addr, 2, 1, buffer); else - target->type->write_memory(target, addr, 1, len, buffer); + retval = target->type->write_memory(target, addr, 1, len, buffer); break; case 3: case 1: - target->type->write_memory(target, addr, 1, len, buffer); + retval = target->type->write_memory(target, addr, 1, len, buffer); break; - /* handle bulk writes */ + /* handle bulk writes */ default: - target_write_buffer(target, addr, len, buffer); + retval = target_write_buffer(target, addr, len, buffer); break; } - gdb_put_packet(connection, "OK", 2); - + 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; } -void gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +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 != ',') - return; + { + ERROR("incomplete write memory binary packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } len = strtoul(separator+1, &separator, 16); if (*(separator++) != ':') - return; + { + 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) - target->type->write_memory(target, addr, 4, 1, buffer); + retval = target->type->write_memory(target, addr, 4, 1, buffer); else - target->type->write_memory(target, addr, 1, len, buffer); + retval = 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); + retval = target->type->write_memory(target, addr, 2, 1, buffer); else - target->type->write_memory(target, addr, 1, len, buffer); + retval = target->type->write_memory(target, addr, 1, len, buffer); break; case 3: case 1: - target->type->write_memory(target, addr, 1, len, buffer); + retval = target->type->write_memory(target, addr, 1, len, buffer); break; default: - target_write_buffer(target, addr, len, buffer); + retval = target_write_buffer(target, addr, len, buffer); break; } - + free(buffer); } - gdb_put_packet(connection, "OK", 2); + 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) @@ -822,11 +1031,10 @@ void gdb_step_continue_packet(connection_t *connection, target_t *target, char * int current = 0; u32 address = 0x0; - DEBUG(""); + DEBUG("-"); if (packet_size > 1) { - u32 address = 0; packet[packet_size] = 0; address = strtoul(packet + 1, NULL, 16); } @@ -847,20 +1055,39 @@ void gdb_step_continue_packet(connection_t *connection, target_t *target, char * } } -void gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +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; + enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */; enum watchpoint_rw wp_type; u32 address; u32 size; char *separator; int retval; - DEBUG(""); + DEBUG("-"); type = strtoul(packet + 1, &separator, 16); - + if (type == 0) /* memory breakpoint */ bp_type = BKPT_SOFT; else if (type == 1) /* hardware breakpoint */ @@ -871,14 +1098,20 @@ void gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target wp_type = WPT_READ; else if (type == 4) /* access watchpoint */ wp_type = WPT_ACCESS; - + if (*separator != ',') - return; + { + ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } address = strtoul(separator+1, &separator, 16); if (*separator != ',') - return; + { + ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); + return ERROR_SERVER_REMOTE_CLOSED; + } size = strtoul(separator+1, &separator, 16); @@ -890,41 +1123,53 @@ void gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target { 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; - } + 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); } - 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); + { + 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); + gdb_put_packet(connection, "OK", 2); + } break; } default: break; } + return ERROR_OK; } -void gdb_query_packet(connection_t *connection, char *packet, int packet_size) +int gdb_query_packet(connection_t *connection, target_t *target, 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,")) { @@ -944,10 +1189,195 @@ void gdb_query_packet(connection_t *connection, char *packet, int packet_size) free(cmd); } gdb_put_packet(connection, "OK", 2); - return; + return ERROR_OK; + } + + if (strstr(packet, "qCRC:")) + { + if (packet_size > 5) + { + int retval; + u8 gdb_reply[9]; + 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, 9, "C%2.2x", checksum); + gdb_put_packet(connection, gdb_reply, 9); + } + else + { + if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK) + return retval; + } + + 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 (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, 0)) != ERROR_OK) + { + if (result == ERROR_FLASH_DST_OUT_OF_BANK) + gdb_put_packet(connection, "E.memtype", 9); + else + gdb_send_error(connection, EIO); + + if (error_str) + { + ERROR("flash writing failed: %s", error_str); + free(error_str); + } + } + else + { + DEBUG("wrote %u bytes from vFlash image to flash", written); + gdb_put_packet(connection, "OK", 2); + } + + image_close(gdb_connection->vflash_image); + free(gdb_connection->vflash_image); + gdb_connection->vflash_image = NULL; + + 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; } int gdb_input(connection_t *connection) @@ -973,63 +1403,67 @@ int gdb_input(connection_t *connection) case ERROR_SERVER_REMOTE_CLOSED: return ERROR_SERVER_REMOTE_CLOSED; default: - ERROR("unexpected error"); + 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 */ + * we don't have threads, send empty reply */ gdb_put_packet(connection, NULL, 0); break; case 'q': - gdb_query_packet(connection, packet, packet_size); + retval = gdb_query_packet(connection, target, packet, packet_size); break; case 'g': - gdb_get_registers_packet(connection, target, packet, packet_size); + retval = gdb_get_registers_packet(connection, target, packet, packet_size); break; case 'G': - gdb_set_registers_packet(connection, target, packet, packet_size); + retval = gdb_set_registers_packet(connection, target, packet, packet_size); break; case 'p': - gdb_get_register_packet(connection, target, packet, packet_size); + retval = gdb_get_register_packet(connection, target, packet, packet_size); break; case 'P': - gdb_set_register_packet(connection, target, packet, packet_size); + retval = gdb_set_register_packet(connection, target, packet, packet_size); break; case 'm': - gdb_read_memory_packet(connection, target, packet, packet_size); + retval = gdb_read_memory_packet(connection, target, packet, packet_size); break; case 'M': - gdb_write_memory_packet(connection, target, packet, packet_size); + retval = gdb_write_memory_packet(connection, target, packet, packet_size); break; case 'z': case 'Z': - gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size); + retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size); break; case '?': gdb_last_signal_packet(connection, target, packet, packet_size); - break; + 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); + retval = gdb_detach(connection, target); break; case 'X': - gdb_write_memory_binary_packet(connection, target, packet, packet_size); + 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); @@ -1040,8 +1474,12 @@ int gdb_input(connection_t *connection) 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) @@ -1050,7 +1488,7 @@ int gdb_input(connection_t *connection) gdb_con->ctrl_c = 0; } } - + } while (gdb_con->buf_cnt > 0); return ERROR_OK; @@ -1061,35 +1499,36 @@ 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; } @@ -1106,10 +1545,42 @@ int handle_gdb_port_command(struct command_context_s *cmd_ctx, char *cmd, char * 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 gdb_register_commands(command_context_t *command_context) { register_command(command_context, NULL, "gdb_port", handle_gdb_port_command, - COMMAND_CONFIG, ""); + COMMAND_CONFIG, ""); + register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command, + COMMAND_CONFIG, ""); return ERROR_OK; }