X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Fserver%2Fgdb_server.c;h=54899589dc622fe5fda07e4c76c4d5d28c07bc56;hp=b2527d21d818e2f12324b0ca576c1a5a11423b41;hb=6c137a2fc0bf53b9c0b8eda51e6f5361552b0112;hpb=bf1e9a83c877f1439fe0e7b170ba897e11d08b1b diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c index b2527d21d8..54899589dc 100644 --- a/src/server/gdb_server.c +++ b/src/server/gdb_server.c @@ -2,7 +2,7 @@ * Copyright (C) 2005 by Dominic Rath * * Dominic.Rath@gmx.de * * * - * Copyright (C) 2007-2009 Øyvind Harboe * + * Copyright (C) 2007-2010 Øyvind Harboe * * oyvind.harboe@zylin.com * * * * Copyright (C) 2008 by Spencer Oliver * @@ -61,7 +61,12 @@ struct gdb_connection bool sync; /* set flag to true if you want the next stepi to return immediately. allowing GDB to pick up a fresh set of register values from the target without modifying the target state. */ - + /* We delay reporting memory write errors until next step/continue or memory + * write. This improves performance of gdb load significantly as the GDB packet + * can be replied immediately and a new GDB packet will be ready without delay + * (ca. 10% or so...). + */ + bool mem_write_error; }; @@ -75,8 +80,8 @@ static int gdb_breakpoint_override; static enum breakpoint_type gdb_breakpoint_override_type; static int gdb_error(struct connection *connection, int retval); -static unsigned short gdb_port = 3333; -static unsigned short gdb_port_next = 0; +static const char *gdb_port; +static const char *gdb_port_next; static const char DIGITS[16] = "0123456789abcdef"; static void gdb_log_callback(void *priv, const char *file, unsigned line, @@ -166,9 +171,12 @@ static int gdb_get_char_inner(struct connection *connection, int* next_char) struct gdb_connection *gdb_con = connection->priv; int retval = ERROR_OK; +#ifdef _DEBUG_GDB_IO_ + char *debug_buffer; +#endif for (;;) { - if (connection->service->type == CONNECTION_PIPE) + if (connection->service->type != CONNECTION_TCP) { gdb_con->buf_cnt = read(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE); } @@ -320,20 +328,9 @@ static int gdb_write(struct connection *connection, void *data, int len) if (gdb_con->closed) return ERROR_SERVER_REMOTE_CLOSED; - if (connection->service->type == CONNECTION_PIPE) + if (connection_write(connection, data, len) == len) { - /* write to stdout */ - if (write(STDOUT_FILENO, data, len) == len) - { - return ERROR_OK; - } - } - else - { - if (write_socket(connection->fd, data, len) == len) - { - return ERROR_OK; - } + return ERROR_OK; } gdb_con->closed = 1; return ERROR_SERVER_REMOTE_CLOSED; @@ -752,22 +749,22 @@ static void gdb_frontend_halted(struct target *target, struct connection *connec if (gdb_connection->frontend_state == TARGET_RUNNING) { char sig_reply[4]; - int signal; + int signal_var; /* stop forwarding log packets! */ log_remove_callback(gdb_log_callback, connection); if (gdb_connection->ctrl_c) { - signal = 0x2; + signal_var = 0x2; gdb_connection->ctrl_c = 0; } else { - signal = gdb_last_signal(target); + signal_var = gdb_last_signal(target); } - snprintf(sig_reply, 4, "T%2.2x", signal); + snprintf(sig_reply, 4, "T%2.2x", signal_var); gdb_put_packet(connection, sig_reply, 3); gdb_connection->frontend_state = TARGET_HALTED; } @@ -821,6 +818,7 @@ static int gdb_new_connection(struct connection *connection) gdb_connection->busy = 0; gdb_connection->noack_mode = 0; gdb_connection->sync = true; + gdb_connection->mem_write_error = false; /* send ACK to GDB for debug request */ gdb_write(connection, "+", 1); @@ -849,6 +847,26 @@ static int gdb_new_connection(struct connection *connection) gdb_putback_char(connection, initial_ack); target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_ATTACH); + if (gdb_use_memory_map) + { + /* Connect must fail if the memory map can't be set up correctly. + * + * This will cause an auto_probe to be invoked, which is either + * a no-op or it will fail when the target isn't ready(e.g. not halted). + */ + int i; + for (i = 0; i < flash_get_bank_count(); i++) + { + struct flash_bank *p; + retval = get_flash_bank_by_num(i, &p); + if (retval != ERROR_OK) + { + LOG_ERROR("Connect failed. Consider setting up a gdb-attach event for the target to prepare target for GDB connect."); + return retval; + } + } + } + gdb_actual_connections++; LOG_DEBUG("New GDB Connection: %d, Target %s, state: %s", gdb_actual_connections, @@ -916,11 +934,11 @@ static int gdb_last_signal_packet(struct connection *connection, struct target *target, char* packet, int packet_size) { char sig_reply[4]; - int signal; + int signal_var; - signal = gdb_last_signal(target); + signal_var = gdb_last_signal(target); - snprintf(sig_reply, 4, "S%2.2x", signal); + snprintf(sig_reply, 4, "S%2.2x", signal_var); gdb_put_packet(connection, sig_reply, 3); return ERROR_OK; @@ -1190,29 +1208,14 @@ static int gdb_set_register_packet(struct connection *connection, return ERROR_OK; } +/* No attempt is made to translate the "retval" to + * GDB speak. This has to be done at the calling + * site as no mapping really exists. + */ static int gdb_error(struct connection *connection, int retval) { - switch (retval) - { - case ERROR_TARGET_DATA_ABORT: - gdb_send_error(connection, EIO); - break; - case ERROR_TARGET_TRANSLATION_FAULT: - gdb_send_error(connection, EFAULT); - break; - case ERROR_TARGET_UNALIGNED_ACCESS: - gdb_send_error(connection, EFAULT); - break; - case ERROR_TARGET_NOT_HALTED: - gdb_send_error(connection, EFAULT); - break; - default: - /* This could be that the target reset itself. */ - LOG_ERROR("unexpected error %i", retval); - gdb_send_error(connection, EFAULT); - break; - } - + LOG_DEBUG("Reporting %i to GDB as generic error", retval); + gdb_send_error(connection, EFAULT); return ERROR_OK; } @@ -1361,7 +1364,7 @@ static int gdb_write_memory_binary_packet(struct connection *connection, uint32_t addr = 0; uint32_t len = 0; - int retval; + int retval = ERROR_OK; /* skip command character */ packet++; @@ -1382,14 +1385,18 @@ static int gdb_write_memory_binary_packet(struct connection *connection, return ERROR_SERVER_REMOTE_CLOSED; } - retval = ERROR_OK; - if (len) - { - LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len); + struct gdb_connection *gdb_connection = connection->priv; - retval = target_write_buffer(target, addr, len, (uint8_t*)separator); + if (gdb_connection->mem_write_error) + { + retval = ERROR_FAIL; + /* now that we have reported the memory write error, we can clear the condition */ + gdb_connection->mem_write_error = false; } + /* By replying the packet *immediately* GDB will send us a new packet + * while we write the last one to the target. + */ if (retval == ERROR_OK) { gdb_put_packet(connection, "OK", 2); @@ -1400,6 +1407,17 @@ static int gdb_write_memory_binary_packet(struct connection *connection, return retval; } + if (len) + { + LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len); + + retval = target_write_buffer(target, addr, len, (uint8_t*)separator); + if (retval != ERROR_OK) + { + gdb_connection->mem_write_error = true; + } + } + return ERROR_OK; } @@ -1613,22 +1631,6 @@ static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len return 0; } -static int gdb_calc_blocksize(struct flash_bank *bank) -{ - uint32_t i; - uint32_t block_size = 0xffffffff; - - /* loop through all sectors and return smallest sector size */ - - for (i = 0; i < (uint32_t)bank->num_sectors; i++) - { - if (bank->sectors[i].size < block_size) - block_size = bank->sectors[i].size; - } - - return block_size; -} - static int compare_bank (const void * a, const void * b) { struct flash_bank *b1, *b2; @@ -1647,8 +1649,153 @@ static int compare_bank (const void * a, const void * b) } } -static int gdb_query_packet(struct connection *connection, +static int gdb_memory_map(struct connection *connection, struct target *target, char *packet, int packet_size) +{ + /* 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. + */ + + struct flash_bank *p; + char *xml = NULL; + int size = 0; + int pos = 0; + int retval = ERROR_OK; + struct flash_bank **banks; + int offset; + int length; + char *separator; + uint32_t ram_start = 0; + int i; + int target_flash_banks = 0; + + /* skip command character */ + packet += 23; + + offset = strtoul(packet, &separator, 16); + length = strtoul(separator + 1, &separator, 16); + + xml_printf(&retval, &xml, &pos, &size, "\n"); + + /* Sort banks in ascending order. We need to report non-flash + * memory as ram (or rather read/write) by default for GDB, since + * it has no concept of non-cacheable read/write memory (i/o etc). + * + * FIXME Most non-flash addresses are *NOT* RAM! Don't lie. + * Current versions of GDB assume unlisted addresses are RAM... + */ + banks = malloc(sizeof(struct flash_bank *)*flash_get_bank_count()); + + for (i = 0; i < flash_get_bank_count(); i++) { + retval = get_flash_bank_by_num(i, &p); + if (retval != ERROR_OK) + { + free(banks); + gdb_error(connection, retval); + return retval; + } + if(p->target == target) + banks[target_flash_banks++] = p; + } + + qsort(banks, target_flash_banks, sizeof(struct flash_bank *), + compare_bank); + + for (i = 0; i < flash_get_bank_count(); i++) { + int j; + unsigned sector_size = 0; + uint32_t start, end; + + p = banks[i]; + start = p->base; + end = p->base + p->size; + + if (ram_start < p->base) + xml_printf(&retval, &xml, &pos, &size, + "\n", + ram_start, p->base - ram_start); + + /* Report adjacent groups of same-size sectors. So for + * example top boot CFI flash will list an initial region + * with several large sectors (maybe 128KB) and several + * smaller ones at the end (maybe 32KB). STR7 will have + * regions with 8KB, 32KB, and 64KB sectors; etc. + */ + for (j = 0; j < p->num_sectors; j++) { + unsigned group_len; + + /* Maybe start a new group of sectors. */ + if (sector_size == 0) { + start = p->base + p->sectors[j].offset; + xml_printf(&retval, &xml, &pos, &size, + "sectors[j].size; + } + + /* Does this finish a group of sectors? + * If not, continue an already-started group. + */ + if (j == p->num_sectors -1) + group_len = (p->base + p->size) - start; + else if (p->sectors[j + 1].size != sector_size) + group_len = p->base + p->sectors[j + 1].offset + - start; + else + continue; + + xml_printf(&retval, &xml, &pos, &size, + "length=\"0x%x\">\n" + "" + "0x%x\n" + "\n", + group_len, + sector_size); + sector_size = 0; + } + + ram_start = p->base + p->size; + } + + if (ram_start != 0) + xml_printf(&retval, &xml, &pos, &size, + "\n", + ram_start, 0-ram_start); + /* ELSE a flash chip could be at the very end of the 32 bit address + * space, in which case ram_start will be precisely 0 + */ + + free(banks); + banks = NULL; + + xml_printf(&retval, &xml, &pos, &size, "\n"); + + if (retval != ERROR_OK) { + gdb_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; +} + +static int gdb_query_packet(struct connection *connection, + struct target *target, char *packet, int packet_size) { struct command_context *cmd_ctx = connection->cmd_ctx; struct gdb_connection *gdb_connection = connection->priv; @@ -1747,112 +1894,9 @@ static int gdb_query_packet(struct connection *connection, return ERROR_OK; } - else if (strstr(packet, "qXfer:memory-map:read::") && (flash_get_bank_count() > 0)) - { - /* We get away with only specifying flash here. Regions that are not - * specified are treated as if we provided no memory map(if not we - * could detect the holes and mark them as RAM). - * Normally we only execute this code once, but no big deal if we - * have to regenerate it a couple of times. */ - - struct flash_bank *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"); - - /* - sort banks in ascending order, we need to make non-flash memory be ram(or rather - read/write) by default for GDB. - GDB does not have a concept of non-cacheable read/write memory. - */ - struct flash_bank **banks = malloc(sizeof(struct flash_bank *)*flash_get_bank_count()); - int i; - - for (i = 0; i < flash_get_bank_count(); i++) - { - p = get_flash_bank_by_num(i); - if (p == NULL) - { - free(banks); - retval = ERROR_FAIL; - gdb_send_error(connection, retval); - return retval; - } - banks[i]=p; - } - - qsort(banks, flash_get_bank_count(), sizeof(struct flash_bank *), compare_bank); - - uint32_t ram_start = 0; - for (i = 0; i < flash_get_bank_count(); i++) - { - p = banks[i]; - - if (ram_start < p->base) - { - xml_printf(&retval, &xml, &pos, &size, "\n", - ram_start, p->base-ram_start); - } - - /* if device has uneven sector sizes, eg. str7, lpc - * we pass the smallest sector size to gdb memory map */ - blocksize = gdb_calc_blocksize(p); - - xml_printf(&retval, &xml, &pos, &size, "\n" \ - "0x%x\n" \ - "\n", \ - p->base, p->size, blocksize); - ram_start = p->base + p->size; - } - if (ram_start != 0) - { - xml_printf(&retval, &xml, &pos, &size, "\n", - ram_start, 0-ram_start); - } else - { - /* a flash chip could be at the very end of the 32 bit address space, in which case - ram_start will be precisely 0 */ - } - - free(banks); - banks = NULL; - - xml_printf(&retval, &xml, &pos, &size, "\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:memory-map:read::") + && (flash_get_bank_count() > 0)) + return gdb_memory_map(connection, target, packet, packet_size); else if (strstr(packet, "qXfer:features:read:")) { char *xml = NULL; @@ -1884,7 +1928,7 @@ static int gdb_query_packet(struct connection *connection, if (retval != ERROR_OK) { - gdb_send_error(connection, retval); + gdb_error(connection, retval); return retval; } @@ -2098,7 +2142,17 @@ static int gdb_input_inner(struct connection *connection) struct gdb_connection *gdb_con = connection->priv; static int extended_protocol = 0; - /* drain input buffer */ + /* drain input buffer. If one of the packets fail, then an error + * packet is replied, if applicable. + * + * This loop will terminate and the error code is returned. + * + * The calling fn will check if this error is something that + * can be recovered from, or if the connection must be closed. + * + * If the error is recoverable, this fn is called again to + * drain the rest of the buffer. + */ do { packet_size = GDB_BUFFER_SIZE-1; @@ -2182,18 +2236,24 @@ static int gdb_input_inner(struct connection *connection) case 'c': case 's': { - int retval = ERROR_OK; - - struct gdb_connection *gdb_con = connection->priv; log_add_callback(gdb_log_callback, connection); + if (gdb_con->mem_write_error) + { + LOG_ERROR("Memory write failure!"); + + /* now that we have reported the memory write error, we can clear the condition */ + gdb_con->mem_write_error = false; + } + bool nostep = false; + bool already_running = false; if (target->state == TARGET_RUNNING) { - LOG_WARNING("The target is already running. Halt target before stepi/continue."); - retval = target_halt(target); - if (retval == ERROR_OK) - retval = target_wait_state(target, TARGET_HALTED, 100); + LOG_WARNING("WARNING! The target is already running. " + "All changes GDB did to registers will be discarded! " + "Waiting for target to halt."); + already_running = true; } else if (target->state != TARGET_HALTED) { LOG_WARNING("The target is not in the halted nor running stated, stepi/continue ignored."); @@ -2209,7 +2269,7 @@ static int gdb_input_inner(struct connection *connection) } gdb_con->sync = false; - if ((retval!=ERROR_OK) || nostep) + if (!already_running && nostep) { /* Either the target isn't in the halted state, then we can't * step/continue. This might be early setup, etc. @@ -2229,11 +2289,17 @@ static int gdb_input_inner(struct connection *connection) */ gdb_con->frontend_state = TARGET_RUNNING; target_call_event_callbacks(target, TARGET_EVENT_GDB_START); - int retval = gdb_step_continue_packet(connection, target, packet, packet_size); - if (retval != ERROR_OK) + + if (!already_running) { - /* we'll never receive a halted condition... issue a false one.. */ - gdb_frontend_halted(target, connection); + /* Here we don't want packet processing to stop even if this fails, + * so we use a local variable instead of retval. */ + retval = gdb_step_continue_packet(connection, target, packet, packet_size); + if (retval != ERROR_OK) + { + /* we'll never receive a halted condition... issue a false one.. */ + gdb_frontend_halted(target, connection); + } } } } @@ -2344,32 +2410,37 @@ static int gdb_target_start(struct target *target, uint16_t port) static int gdb_target_add_one(struct target *target) { - if (gdb_port == 0 && server_use_pipes == 0) - { - LOG_INFO("gdb port disabled"); - return ERROR_OK; - } - if (0 == gdb_port_next) - gdb_port_next = gdb_port; - - bool use_pipes = server_use_pipes; - static bool server_started_with_pipes = false; - if (server_started_with_pipes) + long portnumber_parsed; + /* If we can parse the port number + * then we increment the port number for the next target. + */ + char *end_parse; + portnumber_parsed = strtol(gdb_port_next, &end_parse, 0); + if (!*end_parse) { - LOG_WARNING("gdb service permits one target when using pipes"); - if (0 == gdb_port) - return ERROR_OK; - - use_pipes = false; + LOG_ERROR("Illegal port number"); + return ERROR_FAIL; } - int e = gdb_target_start(target, use_pipes ? 0 : gdb_port_next); - if (ERROR_OK == e) + int retval = gdb_target_start(target, portnumber_parsed); + if (retval == ERROR_OK) { - server_started_with_pipes |= use_pipes; - gdb_port_next++; + long portnumber; + /* If we can parse the port number + * then we increment the port number for the next target. + */ + char *end; + strtol(gdb_port_next, &end, 0); + if (!*end) + { + if (parse_long(gdb_port_next, &portnumber) == ERROR_OK) + { + free((void *)gdb_port_next); + gdb_port_next = alloc_printf("%d", portnumber+1); + } + } } - return e; + return retval; } int gdb_target_add_all(struct target *target) @@ -2414,34 +2485,37 @@ COMMAND_HANDLER(handle_gdb_sync_command) /* daemon configuration command gdb_port */ COMMAND_HANDLER(handle_gdb_port_command) { - int retval = CALL_COMMAND_HANDLER(server_port_command, &gdb_port); + int retval = CALL_COMMAND_HANDLER(server_pipe_command, &gdb_port); if (ERROR_OK == retval) - gdb_port_next = gdb_port; + gdb_port_next = strdup(gdb_port); return retval; } COMMAND_HANDLER(handle_gdb_memory_map_command) { - if (CMD_ARGC == 1) - COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_use_memory_map); + if (CMD_ARGC != 1) + return ERROR_COMMAND_SYNTAX_ERROR; - return ERROR_COMMAND_SYNTAX_ERROR; + COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_use_memory_map); + return ERROR_OK; } COMMAND_HANDLER(handle_gdb_flash_program_command) { - if (CMD_ARGC == 1) - COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_flash_program); + if (CMD_ARGC != 1) + return ERROR_COMMAND_SYNTAX_ERROR; - return ERROR_COMMAND_SYNTAX_ERROR; + COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_flash_program); + return ERROR_OK; } COMMAND_HANDLER(handle_gdb_report_data_abort_command) { - if (CMD_ARGC == 1) - COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_report_data_abort); + if (CMD_ARGC != 1) + return ERROR_COMMAND_SYNTAX_ERROR; - return ERROR_COMMAND_SYNTAX_ERROR; + COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_report_data_abort); + return ERROR_OK; } /* gdb_breakpoint_override */ @@ -2530,5 +2604,7 @@ static const struct command_registration gdb_command_handlers[] = { int gdb_register_commands(struct command_context *cmd_ctx) { + gdb_port = strdup("3333"); + gdb_port_next = strdup("3333"); return register_commands(cmd_ctx, NULL, gdb_command_handlers); }