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Outline
#include "config.h"
#include <target/breakpoints.h>
#include <target/target_request.h>
#include <target/register.h>
#include <target/target.h>
#include <target/target_type.h>
#include <target/semihosting_common.h>
#include "server.h"
#include <flash/nor/core.h>
#include "gdb_server.h"
#include <target/image.h>
#include <jtag/jtag.h>
#include "rtos/rtos.h"
#include "target/smp.h"
gdb_output_flag
target_desc_format
gdb_connection
#define _DEBUG_GDB_IO_
current_gdb_connection
gdb_breakpoint_override
gdb_breakpoint_override_type
gdb_port
gdb_port_next
gdb_actual_connections
gdb_use_memory_map
gdb_flash_program
gdb_report_data_abort
gdb_report_register_access_error
gdb_use_target_description
gdb_running_type
gdb_last_signal(struct target *)
check_pending(struct connection *, int, int *)
gdb_get_char_inner(struct connection *, int *)
gdb_get_char_fast(struct connection *, int *, char **, int *)
gdb_get_char(struct connection *, int *)
gdb_putback_char(struct connection *, int)
gdb_write(struct connection *, void *, int)
gdb_log_incoming_packet(struct connection *, char *)
gdb_log_outgoing_packet(struct connection *, char *, unsigned int, unsigned char)
gdb_put_packet_inner(struct connection *, char *, int)
gdb_put_packet(struct connection *, char *, int)
fetch_packet(struct connection *, int *, int, int *, char *)
gdb_get_packet_inner(struct connection *, char *, int *)
gdb_get_packet(struct connection *, char *, int *)
gdb_output_con(struct connection *, const char *)
gdb_output(struct command_context *, const char *)
gdb_signal_reply(struct target *, struct connection *)
gdb_fileio_reply(struct target *, struct connection *)
gdb_frontend_halted(struct target *, struct connection *)
gdb_target_callback_event_handler(struct target *, enum target_event, void *)
gdb_new_connection(struct connection *)
gdb_connection_closed(struct connection *)
gdb_send_error(struct connection *, uint8_t)
gdb_last_signal_packet(struct connection *, const char *, int)
gdb_reg_pos(struct target *, int, int)
gdb_str_to_target(struct target *, char *, struct reg *)
gdb_target_to_reg(struct target *, const char *, int, uint8_t *)
gdb_get_reg_value_as_str(struct target *, char *, struct reg *)
gdb_get_registers_packet(struct connection *, const char *, int)
gdb_set_registers_packet(struct connection *, const char *, int)
gdb_get_register_packet(struct connection *, const char *, int)
gdb_set_register_packet(struct connection *, const char *, int)
gdb_error(struct connection *, int)
gdb_read_memory_packet(struct connection *, const char *, int)
gdb_write_memory_packet(struct connection *, const char *, int)
gdb_write_memory_binary_packet(struct connection *, const char *, int)
gdb_step_continue_packet(struct connection *, const char *, int)
gdb_breakpoint_watchpoint_packet(struct connection *, const char *, int)
xml_printf(int *, char **, int *, int *, const char *, ...)
decode_xfer_read(const char *, char **, int *, unsigned int *)
compare_bank(const void *, const void *)
extend_address_for_gdb(struct target *, target_addr_t)
gdb_memory_map(struct connection *, const char *, int)
gdb_get_reg_type_name(enum reg_type)
lookup_add_arch_defined_types(const char ***, const char *, int *)
gdb_generate_reg_type_description(struct target *, char **, int *, int *, struct reg_data_type *, const char ***, int *)
get_reg_features_list(struct target *, const char ***, int *, struct reg **, int)
smp_reg_list_noread(struct target *, struct reg ***, int *, enum target_register_class)
gdb_generate_target_description(struct target *, char **)
gdb_get_target_description_chunk(struct target *, struct target_desc_format *, char **, int32_t, uint32_t)
gdb_target_description_supported(struct target *, bool *)
gdb_generate_thread_list(struct target *, char **)
gdb_get_thread_list_chunk(struct target *, char **, char **, int32_t, uint32_t)
gdb_query_packet(struct connection *, const char *, int)
gdb_handle_vcont_packet(struct connection *, const char *, int)
next_hex_encoded_field(const char **, char)
gdb_restart_inferior(struct connection *, const char *, int)
gdb_handle_vrun_packet(struct connection *, const char *, int)
gdb_v_packet(struct connection *, const char *, int)
gdb_detach(struct connection *)
gdb_fileio_response_packet(struct connection *, const char *, int)
gdb_log_callback(void *, const char *, unsigned int, const char *, const char *)
gdb_sig_halted(struct connection *)
gdb_input_inner(struct connection *)
gdb_input(struct connection *)
gdb_async_notif(struct connection *)
gdb_keep_client_alive(struct connection *)
gdb_service_driver
gdb_target_start(struct target *, const char *)
gdb_target_add_one(struct target *)
gdb_target_add_all(struct target *)
handle_gdb_sync_command(struct command_invocation *)
handle_gdb_port_command(struct command_invocation *)
handle_gdb_memory_map_command(struct command_invocation *)
handle_gdb_flash_program_command(struct command_invocation *)
handle_gdb_report_data_abort_command(struct command_invocation *)
handle_gdb_report_register_access_error(struct command_invocation *)
handle_gdb_breakpoint_override_command(struct command_invocation *)
handle_gdb_target_description_command(struct command_invocation *)
handle_gdb_save_tdesc_command(struct command_invocation *)
gdb_subcommand_handlers
gdb_command_handlers
gdb_register_commands(struct command_context *)
gdb_service_free()
gdb_get_actual_connections()
Files
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SourceVuDevelopment ToolsOpenOCDsrc/server/gdb_server.c
 
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// SPDX-License-Identifier: GPL-2.0-or-later /*************************************************************************** * Copyright (C) 2005 by Dominic Rath * * Dominic.Rath@gmx.de * * * * Copyright (C) 2007-2010 Øyvind Harboe * * oyvind.harboe@zylin.com * * * * Copyright (C) 2008 by Spencer Oliver * * spen@spen-soft.co.uk * * * * Copyright (C) 2011 by Broadcom Corporation * * Evan Hunter - ehunter@broadcom.com * * * * Copyright (C) ST-Ericsson SA 2011 * * michel.jaouen@stericsson.com : smp minimum support * * * * Copyright (C) 2013 Andes Technology * * Hsiangkai Wang <hkwang@andestech.com> * * * * Copyright (C) 2013 Franck Jullien * * elec4fun@gmail.com * ***************************************************************************//* ... */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <target/breakpoints.h> #include <target/target_request.h> #include <target/register.h> #include <target/target.h> #include <target/target_type.h> #include <target/semihosting_common.h> #include "server.h" #include <flash/nor/core.h> #include "gdb_server.h" #include <target/image.h> #include <jtag/jtag.h> #include "rtos/rtos.h" #include "target/smp.h" 13 includes /** * @file * GDB server implementation. * * This implements the GDB Remote Serial Protocol, over TCP connections, * giving GDB access to the JTAG or other hardware debugging facilities * found in most modern embedded processors. *//* ... */ enum gdb_output_flag { /* GDB doesn't accept 'O' packets */ GDB_OUTPUT_NO, /* GDB doesn't accept 'O' packets but accepts notifications */ GDB_OUTPUT_NOTIF, /* GDB accepts 'O' packets */ GDB_OUTPUT_ALL, ...}; struct target_desc_format { char *tdesc; uint32_t tdesc_length; ...}; /* private connection data for GDB */ struct gdb_connection { char buffer[GDB_BUFFER_SIZE + 1]; /* Extra byte for null-termination */ char *buf_p; int buf_cnt; bool ctrl_c; enum target_state frontend_state; struct image *vflash_image; bool closed; /* set to prevent re-entrance from log messages during gdb_get_packet() * and gdb_put_packet(). *//* ... */ bool busy; int noack_mode; /* 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. *//* ... */ bool sync; /* 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; /* with extended-remote it seems we need to better emulate attach/detach. * what this means is we reply with a W stop reply after a kill packet, * normally we reply with a S reply via gdb_last_signal_packet. * as a side note this behaviour only effects gdb > 6.8 *//* ... */ bool attached; /* set when extended protocol is used */ bool extended_protocol; /* temporarily used for target description support */ struct target_desc_format target_desc; /* temporarily used for thread list support */ char *thread_list; /* flag to mask the output from gdb_log_callback() */ enum gdb_output_flag output_flag; /* Unique index for this GDB connection. */ unsigned int unique_index; ...}; #if 0 #define _DEBUG_GDB_IO_ #endif static struct gdb_connection *current_gdb_connection; static int gdb_breakpoint_override; static enum breakpoint_type gdb_breakpoint_override_type; static int gdb_error(struct connection *connection, int retval); static char *gdb_port; static char *gdb_port_next; static void gdb_log_callback(void *priv, const char *file, unsigned line, const char *function, const char *string); static void gdb_sig_halted(struct connection *connection); /* number of gdb connections, mainly to suppress gdb related debugging spam * in helper/log.c when no gdb connections are actually active *//* ... */ static int gdb_actual_connections; /* set if we are sending a memory map to gdb * via qXfer:memory-map:read packet *//* ... */ /* enabled by default*/ static bool gdb_use_memory_map = true; /* enabled by default*/ static bool gdb_flash_program = true; /* 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. * Disabled by default. *//* ... */ static int gdb_report_data_abort; /* If set, errors when accessing registers are reported to gdb. Disabled by * default. *//* ... */ static int gdb_report_register_access_error; /* set if we are sending target descriptions to gdb * via qXfer:features:read packet *//* ... */ /* enabled by default */ static bool gdb_use_target_description = true; /* current processing free-run type, used by file-I/O */ static char gdb_running_type; static int gdb_last_signal(struct target *target) { LOG_TARGET_DEBUG(target, "Debug reason is: %s", target_debug_reason_str(target->debug_reason)); switch (target->debug_reason) { case DBG_REASON_DBGRQ: return 0x2; /* SIGINT */case DBG_REASON_DBGRQ: case DBG_REASON_BREAKPOINT: case DBG_REASON_WATCHPOINT: case DBG_REASON_WPTANDBKPT: return 0x05; /* SIGTRAP */case DBG_REASON_WPTANDBKPT: case DBG_REASON_SINGLESTEP: return 0x05; /* SIGTRAP */case DBG_REASON_SINGLESTEP: case DBG_REASON_EXC_CATCH: return 0x05;case DBG_REASON_EXC_CATCH: case DBG_REASON_NOTHALTED: return 0x0; /* no signal... shouldn't happen */case DBG_REASON_NOTHALTED: default: LOG_USER("undefined debug reason %d (%s) - target needs reset", target->debug_reason, target_debug_reason_str(target->debug_reason)); return 0x0;default }switch (target->debug_reason) { ... } }{ ... } static int check_pending(struct connection *connection, int timeout_s, int *got_data) { /* a non-blocking socket will block if there is 0 bytes available on the socket, * but return with as many bytes as are available immediately *//* ... */ struct timeval tv; fd_set read_fds; struct gdb_connection *gdb_con = connection->priv; int t; if (!got_data) got_data = &t; *got_data = 0; if (gdb_con->buf_cnt > 0) { *got_data = 1; return ERROR_OK; }if (gdb_con->buf_cnt > 0) { ... } FD_ZERO(&read_fds); FD_SET(connection->fd, &read_fds); tv.tv_sec = timeout_s; tv.tv_usec = 0; if (socket_select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0) { /* This can typically be because a "monitor" command took too long * before printing any progress messages *//* ... */ if (timeout_s > 0) return ERROR_GDB_TIMEOUT; else return ERROR_OK; }if (socket_select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0) { ... } *got_data = FD_ISSET(connection->fd, &read_fds) != 0; return ERROR_OK; }{ ... } 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_TCP) gdb_con->buf_cnt = read(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE); else { retval = check_pending(connection, 1, NULL); if (retval != ERROR_OK) return retval; gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE); }else { ... } if (gdb_con->buf_cnt > 0) break; if (gdb_con->buf_cnt == 0) { LOG_DEBUG("GDB connection closed by the remote client"); gdb_con->closed = true; return ERROR_SERVER_REMOTE_CLOSED; }if (gdb_con->buf_cnt == 0) { ... } #ifdef _WIN32 bool retry = (WSAGetLastError() == WSAEWOULDBLOCK); #else bool retry = (errno == EAGAIN); #endif if (retry) { // Try again after a delay usleep(1000); }if (retry) { ... } else { // Print error and close the socket log_socket_error("GDB"); gdb_con->closed = true; return ERROR_SERVER_REMOTE_CLOSED; }else { ... } }for (;;) { ... } #ifdef _DEBUG_GDB_IO_ debug_buffer = strndup(gdb_con->buffer, gdb_con->buf_cnt); LOG_DEBUG("received '%s'", debug_buffer); free(debug_buffer);/* ... */ #endif gdb_con->buf_p = gdb_con->buffer; gdb_con->buf_cnt--; *next_char = *(gdb_con->buf_p++); if (gdb_con->buf_cnt > 0) connection->input_pending = true; else connection->input_pending = false; #ifdef _DEBUG_GDB_IO_ LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); #endif return retval; }{ ... } /** * The cool thing about this fn is that it allows buf_p and buf_cnt to be * held in registers in the inner loop. * * For small caches and embedded systems this is important! *//* ... */ static inline int gdb_get_char_fast(struct connection *connection, int *next_char, char **buf_p, int *buf_cnt) { int retval = ERROR_OK; if ((*buf_cnt)-- > 0) { *next_char = **buf_p; (*buf_p)++; if (*buf_cnt > 0) connection->input_pending = true; else connection->input_pending = false; #ifdef _DEBUG_GDB_IO_ LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); #endif return ERROR_OK; }if ((*buf_cnt)-- > 0) { ... } struct gdb_connection *gdb_con = connection->priv; gdb_con->buf_p = *buf_p; gdb_con->buf_cnt = *buf_cnt; retval = gdb_get_char_inner(connection, next_char); *buf_p = gdb_con->buf_p; *buf_cnt = gdb_con->buf_cnt; return retval; }{ ... } static int gdb_get_char(struct connection *connection, int *next_char) { struct gdb_connection *gdb_con = connection->priv; return gdb_get_char_fast(connection, next_char, &gdb_con->buf_p, &gdb_con->buf_cnt); }{ ... } static int gdb_putback_char(struct connection *connection, int last_char) { struct gdb_connection *gdb_con = connection->priv; if (gdb_con->buf_p > gdb_con->buffer) { *(--gdb_con->buf_p) = last_char; gdb_con->buf_cnt++; }if (gdb_con->buf_p > gdb_con->buffer) { ... } else LOG_ERROR("BUG: couldn't put character back"); return ERROR_OK; }{ ... } /* The only way we can detect that the socket is closed is the first time * we write to it, we will fail. Subsequent write operations will * succeed. Shudder! *//* ... */ static int gdb_write(struct connection *connection, void *data, int len) { struct gdb_connection *gdb_con = connection->priv; if (gdb_con->closed) { LOG_DEBUG("GDB socket marked as closed, cannot write to it."); return ERROR_SERVER_REMOTE_CLOSED; }if (gdb_con->closed) { ... } if (connection_write(connection, data, len) == len) return ERROR_OK; LOG_WARNING("Error writing to GDB socket. Dropping the connection."); gdb_con->closed = true; return ERROR_SERVER_REMOTE_CLOSED; }{ ... } static void gdb_log_incoming_packet(struct connection *connection, char *packet) { if (!LOG_LEVEL_IS(LOG_LVL_DEBUG)) return; struct target *target = get_target_from_connection(connection); struct gdb_connection *gdb_connection = connection->priv; /* Avoid dumping non-printable characters to the terminal */ const unsigned packet_len = strlen(packet); const char *nonprint = find_nonprint_char(packet, packet_len); if (nonprint) { /* Does packet at least have a prefix that is printable? * Look within the first 50 chars of the packet. *//* ... */ const char *colon = memchr(packet, ':', MIN(50, packet_len)); const bool packet_has_prefix = (colon); const bool packet_prefix_printable = (packet_has_prefix && nonprint > colon); if (packet_prefix_printable) { const unsigned int prefix_len = colon - packet + 1; /* + 1 to include the ':' */ const unsigned int payload_len = packet_len - prefix_len; LOG_TARGET_DEBUG(target, "{%d} received packet: %.*s<binary-data-%u-bytes>", gdb_connection->unique_index, prefix_len, packet, payload_len); }if (packet_prefix_printable) { ... } else { LOG_TARGET_DEBUG(target, "{%d} received packet: <binary-data-%u-bytes>", gdb_connection->unique_index, packet_len); }else { ... } }if (nonprint) { ... } else { /* All chars printable, dump the packet as is */ LOG_TARGET_DEBUG(target, "{%d} received packet: %s", gdb_connection->unique_index, packet); }else { ... } }{ ... } static void gdb_log_outgoing_packet(struct connection *connection, char *packet_buf, unsigned int packet_len, unsigned char checksum) { if (!LOG_LEVEL_IS(LOG_LVL_DEBUG)) return; struct target *target = get_target_from_connection(connection); struct gdb_connection *gdb_connection = connection->priv; if (find_nonprint_char(packet_buf, packet_len)) LOG_TARGET_DEBUG(target, "{%d} sending packet: $<binary-data-%u-bytes>#%2.2x", gdb_connection->unique_index, packet_len, checksum); else LOG_TARGET_DEBUG(target, "{%d} sending packet: $%.*s#%2.2x", gdb_connection->unique_index, packet_len, packet_buf, checksum); }{ ... } static int gdb_put_packet_inner(struct connection *connection, char *buffer, int len) { int i; unsigned char my_checksum = 0; int reply; int retval; struct gdb_connection *gdb_con = connection->priv; for (i = 0; i < len; i++) my_checksum += buffer[i]; #ifdef _DEBUG_GDB_IO_ /* * At this point we should have nothing in the input queue from GDB, * however sometimes '-' is sent even though we've already received * an ACK (+) for everything we've sent off. *//* ... */ int gotdata; for (;; ) { retval = check_pending(connection, 0, &gotdata); if (retval != ERROR_OK) return retval; if (!gotdata) break; retval = gdb_get_char(connection, &reply); if (retval != ERROR_OK) return retval; if (reply == '$') { /* fix a problem with some IAR tools */ gdb_putback_char(connection, reply); LOG_DEBUG("Unexpected start of new packet"); break; }if (reply == '$') { ... } LOG_WARNING("Discard unexpected char %c", reply); }for (;;) { ... } /* ... */#endif while (1) { gdb_log_outgoing_packet(connection, buffer, len, my_checksum); char local_buffer[1024]; local_buffer[0] = '$'; if ((size_t)len + 4 <= sizeof(local_buffer)) { /* performance gain on smaller packets by only a single call to gdb_write() */ memcpy(local_buffer + 1, buffer, len++); len += snprintf(local_buffer + len, sizeof(local_buffer) - len, "#%02x", my_checksum); retval = gdb_write(connection, local_buffer, len); if (retval != ERROR_OK) return retval; }if ((size_t)len + 4 <= sizeof(local_buffer)) { ... } else { /* larger packets are transmitted directly from caller supplied buffer * by several calls to gdb_write() to avoid dynamic allocation *//* ... */ snprintf(local_buffer + 1, sizeof(local_buffer) - 1, "#%02x", my_checksum); retval = gdb_write(connection, local_buffer, 1); if (retval != ERROR_OK) return retval; retval = gdb_write(connection, buffer, len); if (retval != ERROR_OK) return retval; retval = gdb_write(connection, local_buffer + 1, 3); if (retval != ERROR_OK) return retval; }else { ... } if (gdb_con->noack_mode) break; retval = gdb_get_char(connection, &reply); if (retval != ERROR_OK) return retval; if (reply == '+') { gdb_log_incoming_packet(connection, "+"); break; }if (reply == '+') { ... } else if (reply == '-') { /* Stop sending output packets for now */ gdb_con->output_flag = GDB_OUTPUT_NO; gdb_log_incoming_packet(connection, "-"); LOG_WARNING("negative reply, retrying"); }else if (reply == '-') { ... } else if (reply == 0x3) { gdb_con->ctrl_c = true; gdb_log_incoming_packet(connection, "<Ctrl-C>"); retval = gdb_get_char(connection, &reply); if (retval != ERROR_OK) return retval; if (reply == '+') { gdb_log_incoming_packet(connection, "+"); break; }if (reply == '+') { ... } else if (reply == '-') { /* Stop sending output packets for now */ gdb_con->output_flag = GDB_OUTPUT_NO; gdb_log_incoming_packet(connection, "-"); LOG_WARNING("negative reply, retrying"); }else if (reply == '-') { ... } else if (reply == '$') { LOG_ERROR("GDB missing ack(1) - assumed good"); gdb_putback_char(connection, reply); return ERROR_OK; }else if (reply == '$') { ... } else { LOG_ERROR("unknown character(1) 0x%2.2x in reply, dropping connection", reply); gdb_con->closed = true; return ERROR_SERVER_REMOTE_CLOSED; }else { ... } }else if (reply == 0x3) { ... } else if (reply == '$') { LOG_ERROR("GDB missing ack(2) - assumed good"); gdb_putback_char(connection, reply); return ERROR_OK; }else if (reply == '$') { ... } else { LOG_ERROR("unknown character(2) 0x%2.2x in reply, dropping connection", reply); gdb_con->closed = true; return ERROR_SERVER_REMOTE_CLOSED; }else { ... } }while (1) { ... } if (gdb_con->closed) return ERROR_SERVER_REMOTE_CLOSED; return ERROR_OK; }{ ... } int gdb_put_packet(struct connection *connection, char *buffer, int len) { struct gdb_connection *gdb_con = connection->priv; gdb_con->busy = true; int retval = gdb_put_packet_inner(connection, buffer, len); gdb_con->busy = false; /* we sent some data, reset timer for keep alive messages */ kept_alive(); return retval; }{ ... } static inline int fetch_packet(struct connection *connection, int *checksum_ok, int noack, int *len, char *buffer) { unsigned char my_checksum = 0; char checksum[3]; int character; int retval = ERROR_OK; struct gdb_connection *gdb_con = connection->priv; my_checksum = 0; int count = 0; count = 0; /* move this over into local variables to use registers and give the * more freedom to optimize *//* ... */ char *buf_p = gdb_con->buf_p; int buf_cnt = gdb_con->buf_cnt; 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 ((buf_cnt > 2) && ((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 = buf_p; int run = 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 == '#') { ... } 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; }if (character == '}') { ... } else { my_checksum += character & 0xff; buffer[count++] = character & 0xff; }else { ... } }while (i < run) { ... } buf_p += i; buf_cnt -= i; if (done) break; }if ((buf_cnt > 2) && ((buf_cnt + count) < *len)) { ... } if (count > *len) { LOG_ERROR("packet buffer too small"); retval = ERROR_GDB_BUFFER_TOO_SMALL; break; }if (count > *len) { ... } retval = gdb_get_char_fast(connection, &character, &buf_p, &buf_cnt); if (retval != ERROR_OK) break; if (character == '#') break; if (character == '}') { /* data transmitted in binary mode (X packet) * uses 0x7d as escape character *//* ... */ my_checksum += character & 0xff; retval = gdb_get_char_fast(connection, &character, &buf_p, &buf_cnt); if (retval != ERROR_OK) break; my_checksum += character & 0xff; buffer[count++] = (character ^ 0x20) & 0xff; }if (character == '}') { ... } else { my_checksum += character & 0xff; buffer[count++] = character & 0xff; }else { ... } }for (;;) { ... } gdb_con->buf_p = buf_p; gdb_con->buf_cnt = buf_cnt; if (retval != ERROR_OK) return retval; *len = count; retval = gdb_get_char(connection, &character); if (retval != ERROR_OK) return retval; checksum[0] = character; retval = gdb_get_char(connection, &character); if (retval != ERROR_OK) return retval; checksum[1] = character; checksum[2] = 0; if (!noack) *checksum_ok = (my_checksum == strtoul(checksum, NULL, 16)); return ERROR_OK; }{ ... } static int gdb_get_packet_inner(struct connection *connection, char *buffer, int *len) { int character; int retval; struct gdb_connection *gdb_con = connection->priv; while (1) { do { retval = gdb_get_char(connection, &character); if (retval != ERROR_OK) return retval; #ifdef _DEBUG_GDB_IO_ LOG_DEBUG("character: '%c'", character); #endif switch (character) { case '$': break;case '$': case '+': gdb_log_incoming_packet(connection, "+"); /* According to the GDB documentation * (https://sourceware.org/gdb/onlinedocs/gdb/Packet-Acknowledgment.html): * "gdb sends a final `+` acknowledgment of the stub's `OK` * response, which can be safely ignored by the stub." * However OpenOCD server already is in noack mode at this * point and instead of ignoring this it was emitting a * warning. This code makes server ignore the first ACK * that will be received after going into noack mode, * warning only about subsequent ACK's. *//* ... */ if (gdb_con->noack_mode > 1) { LOG_WARNING("acknowledgment received, but no packet pending"); }if (gdb_con->noack_mode > 1) { ... } else if (gdb_con->noack_mode) { LOG_DEBUG("Received first acknowledgment after entering noack mode. Ignoring it."); gdb_con->noack_mode = 2; }else if (gdb_con->noack_mode) { ... } break;case '+': case '-': gdb_log_incoming_packet(connection, "-"); LOG_WARNING("negative acknowledgment, but no packet pending"); break;case '-': case 0x3: gdb_log_incoming_packet(connection, "<Ctrl-C>"); gdb_con->ctrl_c = true; *len = 0; return ERROR_OK;case 0x3: default: LOG_WARNING("ignoring character 0x%x", character); break;default }switch (character) { ... } ...} while (character != '$'); int checksum_ok = 0; /* explicit code expansion here to get faster inlined code in -O3 by not * calculating checksum *//* ... */ if (gdb_con->noack_mode) { retval = fetch_packet(connection, &checksum_ok, 1, len, buffer); if (retval != ERROR_OK) return retval; }if (gdb_con->noack_mode) { ... } else { retval = fetch_packet(connection, &checksum_ok, 0, len, buffer); if (retval != ERROR_OK) return retval; }else { ... } if (gdb_con->noack_mode) { /* checksum is not checked in noack mode */ break; }if (gdb_con->noack_mode) { ... } if (checksum_ok) { retval = gdb_write(connection, "+", 1); if (retval != ERROR_OK) return retval; break; }if (checksum_ok) { ... } }while (1) { ... } if (gdb_con->closed) return ERROR_SERVER_REMOTE_CLOSED; return ERROR_OK; }{ ... } static int gdb_get_packet(struct connection *connection, char *buffer, int *len) { struct gdb_connection *gdb_con = connection->priv; gdb_con->busy = true; int retval = gdb_get_packet_inner(connection, buffer, len); gdb_con->busy = false; return retval; }{ ... } static int gdb_output_con(struct connection *connection, const char *line) { char *hex_buffer; int bin_size; bin_size = strlen(line); hex_buffer = malloc(bin_size * 2 + 2); if (!hex_buffer) return ERROR_GDB_BUFFER_TOO_SMALL; hex_buffer[0] = 'O'; size_t pkt_len = hexify(hex_buffer + 1, (const uint8_t *)line, bin_size, bin_size * 2 + 1); int retval = gdb_put_packet(connection, hex_buffer, pkt_len + 1); free(hex_buffer); return retval; }{ ... } static int gdb_output(struct command_context *context, const char *line) { /* this will be dumped to the log and also sent as an O packet if possible */ LOG_USER_N("%s", line); return ERROR_OK; }{ ... } static void gdb_signal_reply(struct target *target, struct connection *connection) { struct gdb_connection *gdb_connection = connection->priv; char sig_reply[65]; char stop_reason[32]; char current_thread[25]; int sig_reply_len; int signal_var; rtos_update_threads(target); if (target->debug_reason == DBG_REASON_EXIT) { sig_reply_len = snprintf(sig_reply, sizeof(sig_reply), "W00"); }if (target->debug_reason == DBG_REASON_EXIT) { ... } else { struct target *ct; if (target->rtos) { target->rtos->current_threadid = target->rtos->current_thread; target->rtos->gdb_target_for_threadid(connection, target->rtos->current_threadid, &ct); }if (target->rtos) { ... } else { ct = target; }else { ... } if (gdb_connection->ctrl_c) { LOG_TARGET_DEBUG(target, "Responding with signal 2 (SIGINT) to debugger due to Ctrl-C"); signal_var = 0x2; }if (gdb_connection->ctrl_c) { ... } else signal_var = gdb_last_signal(ct); stop_reason[0] = '\0'; if (ct->debug_reason == DBG_REASON_WATCHPOINT) { enum watchpoint_rw hit_wp_type; target_addr_t hit_wp_address; if (watchpoint_hit(ct, &hit_wp_type, &hit_wp_address) == ERROR_OK) { switch (hit_wp_type) { case WPT_WRITE: snprintf(stop_reason, sizeof(stop_reason), "watch:%08" TARGET_PRIxADDR ";", hit_wp_address); break;case WPT_WRITE: case WPT_READ: snprintf(stop_reason, sizeof(stop_reason), "rwatch:%08" TARGET_PRIxADDR ";", hit_wp_address); break;case WPT_READ: case WPT_ACCESS: snprintf(stop_reason, sizeof(stop_reason), "awatch:%08" TARGET_PRIxADDR ";", hit_wp_address); break;case WPT_ACCESS: default: break;default }switch (hit_wp_type) { ... } }if (watchpoint_hit(ct, &hit_wp_type, &hit_wp_address) == ERROR_OK) { ... } }if (ct->debug_reason == DBG_REASON_WATCHPOINT) { ... } current_thread[0] = '\0'; if (target->rtos) snprintf(current_thread, sizeof(current_thread), "thread:%" PRIx64 ";", target->rtos->current_thread); sig_reply_len = snprintf(sig_reply, sizeof(sig_reply), "T%2.2x%s%s", signal_var, stop_reason, current_thread); gdb_connection->ctrl_c = false; }else { ... } gdb_put_packet(connection, sig_reply, sig_reply_len); gdb_connection->frontend_state = TARGET_HALTED; }{ ... } static void gdb_fileio_reply(struct target *target, struct connection *connection) { struct gdb_connection *gdb_connection = connection->priv; char fileio_command[256]; int command_len; bool program_exited = false; if (strcmp(target->fileio_info->identifier, "open") == 0) sprintf(fileio_command, "F%s,%" PRIx64 "/%" PRIx64 ",%" PRIx64 ",%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1, target->fileio_info->param_2 + 1, /* len + trailing zero */ target->fileio_info->param_3, target->fileio_info->param_4); else if (strcmp(target->fileio_info->identifier, "close") == 0) sprintf(fileio_command, "F%s,%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1); else if (strcmp(target->fileio_info->identifier, "read") == 0) sprintf(fileio_command, "F%s,%" PRIx64 ",%" PRIx64 ",%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1, target->fileio_info->param_2, target->fileio_info->param_3); else if (strcmp(target->fileio_info->identifier, "write") == 0) sprintf(fileio_command, "F%s,%" PRIx64 ",%" PRIx64 ",%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1, target->fileio_info->param_2, target->fileio_info->param_3); else if (strcmp(target->fileio_info->identifier, "lseek") == 0) sprintf(fileio_command, "F%s,%" PRIx64 ",%" PRIx64 ",%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1, target->fileio_info->param_2, target->fileio_info->param_3); else if (strcmp(target->fileio_info->identifier, "rename") == 0) sprintf(fileio_command, "F%s,%" PRIx64 "/%" PRIx64 ",%" PRIx64 "/%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1, target->fileio_info->param_2 + 1, /* len + trailing zero */ target->fileio_info->param_3, target->fileio_info->param_4 + 1); /* len + trailing zero */ else if (strcmp(target->fileio_info->identifier, "unlink") == 0) sprintf(fileio_command, "F%s,%" PRIx64 "/%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1, target->fileio_info->param_2 + 1); /* len + trailing zero */ else if (strcmp(target->fileio_info->identifier, "stat") == 0) sprintf(fileio_command, "F%s,%" PRIx64 "/%" PRIx64 ",%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1, target->fileio_info->param_2, target->fileio_info->param_3); else if (strcmp(target->fileio_info->identifier, "fstat") == 0) sprintf(fileio_command, "F%s,%" PRIx64 ",%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1, target->fileio_info->param_2); else if (strcmp(target->fileio_info->identifier, "gettimeofday") == 0) sprintf(fileio_command, "F%s,%" PRIx64 ",%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1, target->fileio_info->param_2); else if (strcmp(target->fileio_info->identifier, "isatty") == 0) sprintf(fileio_command, "F%s,%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1); else if (strcmp(target->fileio_info->identifier, "system") == 0) sprintf(fileio_command, "F%s,%" PRIx64 "/%" PRIx64, target->fileio_info->identifier, target->fileio_info->param_1, target->fileio_info->param_2 + 1); /* len + trailing zero */ else if (strcmp(target->fileio_info->identifier, "exit") == 0) { /* If target hits exit syscall, report to GDB the program is terminated. * In addition, let target run its own exit syscall handler. *//* ... */ program_exited = true; sprintf(fileio_command, "W%02" PRIx64, target->fileio_info->param_1); }else if (strcmp(target->fileio_info->identifier, "exit") == 0) { ... } else { LOG_DEBUG("Unknown syscall: %s", target->fileio_info->identifier); /* encounter unknown syscall, continue */ gdb_connection->frontend_state = TARGET_RUNNING; target_resume(target, 1, 0x0, 0, 0); return; }else { ... } command_len = strlen(fileio_command); gdb_put_packet(connection, fileio_command, command_len); if (program_exited) { /* Use target_resume() to let target run its own exit syscall handler. */ gdb_connection->frontend_state = TARGET_RUNNING; target_resume(target, 1, 0x0, 0, 0); }if (program_exited) { ... } else { gdb_connection->frontend_state = TARGET_HALTED; rtos_update_threads(target); }else { ... } }{ ... } static void gdb_frontend_halted(struct target *target, struct connection *connection) { struct gdb_connection *gdb_connection = connection->priv; /* In the GDB protocol when we are stepping or continuing 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! */ gdb_connection->output_flag = GDB_OUTPUT_NO; /* check fileio first */ if (target_get_gdb_fileio_info(target, target->fileio_info) == ERROR_OK) gdb_fileio_reply(target, connection); else gdb_signal_reply(target, connection); }if (gdb_connection->frontend_state == TARGET_RUNNING) { ... } }{ ... } static int gdb_target_callback_event_handler(struct target *target, enum target_event event, void *priv) { struct connection *connection = priv; struct gdb_service *gdb_service = connection->service->priv; if (gdb_service->target != target) return ERROR_OK; switch (event) { case TARGET_EVENT_GDB_HALT: gdb_frontend_halted(target, connection); break;case TARGET_EVENT_GDB_HALT: case TARGET_EVENT_HALTED: target_call_event_callbacks(target, TARGET_EVENT_GDB_END); break;case TARGET_EVENT_HALTED: default: break;default }switch (event) { ... } return ERROR_OK; }{ ... } static int gdb_new_connection(struct connection *connection) { struct gdb_connection *gdb_connection = malloc(sizeof(struct gdb_connection)); struct target *target; int retval; int initial_ack; static unsigned int next_unique_id = 1; target = get_target_from_connection(connection); connection->priv = gdb_connection; connection->cmd_ctx->current_target = target; /* initialize gdb connection information */ gdb_connection->buf_p = gdb_connection->buffer; gdb_connection->buf_cnt = 0; gdb_connection->ctrl_c = false; gdb_connection->frontend_state = TARGET_HALTED; gdb_connection->vflash_image = NULL; gdb_connection->closed = false; gdb_connection->busy = false; gdb_connection->noack_mode = 0; gdb_connection->sync = false; gdb_connection->mem_write_error = false; gdb_connection->attached = true; gdb_connection->extended_protocol = false; gdb_connection->target_desc.tdesc = NULL; gdb_connection->target_desc.tdesc_length = 0; gdb_connection->thread_list = NULL; gdb_connection->output_flag = GDB_OUTPUT_NO; gdb_connection->unique_index = next_unique_id++; /* output goes through gdb connection */ command_set_output_handler(connection->cmd_ctx, gdb_output, connection); /* we must remove all breakpoints registered to the target as a previous * GDB session could leave dangling breakpoints if e.g. communication * timed out. *//* ... */ breakpoint_clear_target(target); watchpoint_clear_target(target); /* Since version 3.95 (gdb-19990504), with the exclusion of 6.5~6.8, GDB * sends an ACK at connection with the following comment in its source code: * "Ack any packet which the remote side has already sent." * LLDB does the same since the first gdb-remote implementation. * Remove the initial ACK from the incoming buffer. *//* ... */ retval = gdb_get_char(connection, &initial_ack); if (retval != ERROR_OK) return retval; if (initial_ack != '+') gdb_putback_char(connection, initial_ack); target_call_event_callbacks(target, TARGET_EVENT_GDB_ATTACH); if (target->rtos) { /* clean previous rtos session if supported*/ if (target->rtos->type->clean) target->rtos->type->clean(target); /* update threads */ rtos_update_threads(target); }if (target->rtos) { ... } 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). *//* ... */ for (unsigned int i = 0; i < flash_get_bank_count(); i++) { struct flash_bank *p; p = get_flash_bank_by_num_noprobe(i); if (p->target != target) continue; 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, or use 'gdb_memory_map disable'."); return retval; }if (retval != ERROR_OK) { ... } }for (unsigned int i = 0; i < flash_get_bank_count(); i++) { ... } }if (gdb_use_memory_map) { ... } log_printf_lf(all_targets->next ? LOG_LVL_INFO : LOG_LVL_DEBUG, __FILE__, __LINE__, __func__, "New GDB Connection: %d, Target %s, state: %s", gdb_connection->unique_index, target_name(target), target_state_name(target)); if (!target_was_examined(target)) { LOG_TARGET_ERROR(target, "Target not examined yet, refuse gdb connection %d!", gdb_connection->unique_index); return ERROR_TARGET_NOT_EXAMINED; }if (!target_was_examined(target)) { ... } gdb_actual_connections++; if (target->state != TARGET_HALTED) LOG_TARGET_WARNING(target, "GDB connection %d not halted", gdb_actual_connections); /* DANGER! If we fail subsequently, we must remove this handler, * otherwise we occasionally see crashes as the timer can invoke the * callback fn. * * register callback to be informed about target events *//* ... */ target_register_event_callback(gdb_target_callback_event_handler, connection); log_add_callback(gdb_log_callback, connection); return ERROR_OK; }{ ... } static int gdb_connection_closed(struct connection *connection) { struct target *target; struct gdb_connection *gdb_connection = connection->priv; target = get_target_from_connection(connection); /* we're done forwarding messages. Tear down callback before * cleaning up connection. *//* ... */ log_remove_callback(gdb_log_callback, connection); gdb_actual_connections--; LOG_TARGET_DEBUG(target, "{%d} GDB Close, state: %s, gdb_actual_connections=%d", gdb_connection->unique_index, target_state_name(target), gdb_actual_connections); /* see if an image built with vFlash commands is left */ if (gdb_connection->vflash_image) { image_close(gdb_connection->vflash_image); free(gdb_connection->vflash_image); gdb_connection->vflash_image = NULL; }if (gdb_connection->vflash_image) { ... } /* if this connection registered a debug-message receiver delete it */ delete_debug_msg_receiver(connection->cmd_ctx, target); free(connection->priv); connection->priv = NULL; target_unregister_event_callback(gdb_target_callback_event_handler, connection); target_call_event_callbacks(target, TARGET_EVENT_GDB_END); target_call_event_callbacks(target, TARGET_EVENT_GDB_DETACH); return ERROR_OK; }{ ... } static void gdb_send_error(struct connection *connection, uint8_t the_error) { char err[4]; snprintf(err, 4, "E%2.2X", the_error); gdb_put_packet(connection, err, 3); }{ ... } static int gdb_last_signal_packet(struct connection *connection, char const *packet, int packet_size) { struct target *target = get_target_from_connection(connection); struct gdb_connection *gdb_con = connection->priv; char sig_reply[4]; int signal_var; if (!gdb_con->attached) { /* if we are here we have received a kill packet * reply W stop reply otherwise gdb gets very unhappy *//* ... */ gdb_put_packet(connection, "W00", 3); return ERROR_OK; }if (!gdb_con->attached) { ... } signal_var = gdb_last_signal(target); snprintf(sig_reply, 4, "S%2.2x", signal_var); gdb_put_packet(connection, sig_reply, 3); return ERROR_OK; }{ ... } static inline int gdb_reg_pos(struct target *target, int pos, int len) { if (target->endianness == TARGET_LITTLE_ENDIAN) return pos; else return len - 1 - pos; }{ ... } /* Convert register to string of bytes. NB! The # of bits in the * register might be non-divisible by 8(a byte), in which * case an entire byte is shown. * * NB! the format on the wire is the target endianness * * The format of reg->value is little endian * *//* ... */ void gdb_str_to_target(struct target *target, char *tstr, struct reg *reg) { int i; uint8_t *buf; int buf_len; buf = reg->value; buf_len = DIV_ROUND_UP(reg->size, 8); for (i = 0; i < buf_len; i++) { int j = gdb_reg_pos(target, i, buf_len); tstr += sprintf(tstr, "%02x", buf[j]); }for (i = 0; i < buf_len; i++) { ... } }{ ... } /* copy over in register buffer */ static void gdb_target_to_reg(struct target *target, char const *tstr, int str_len, uint8_t *bin) { if (str_len % 2) { LOG_ERROR("BUG: gdb value with uneven number of characters encountered"); exit(-1); }if (str_len % 2) { ... } int i; for (i = 0; i < str_len; i += 2) { unsigned t; if (sscanf(tstr + i, "%02x", &t) != 1) { LOG_ERROR("BUG: unable to convert register value"); exit(-1); }if (sscanf(tstr + i, "%02x", &t) != 1) { ... } int j = gdb_reg_pos(target, i/2, str_len/2); bin[j] = t; }for (i = 0; i < str_len; i += 2) { ... } }{ ... } /* get register value if needed and fill the buffer accordingly */ static int gdb_get_reg_value_as_str(struct target *target, char *tstr, struct reg *reg) { int retval = ERROR_OK; if (!reg->valid) retval = reg->type->get(reg); const unsigned int len = DIV_ROUND_UP(reg->size, 8) * 2; switch (retval) { case ERROR_OK: gdb_str_to_target(target, tstr, reg); return ERROR_OK;case ERROR_OK: case ERROR_TARGET_RESOURCE_NOT_AVAILABLE: memset(tstr, 'x', len); tstr[len] = '\0'; return ERROR_OK;case ERROR_TARGET_RESOURCE_NOT_AVAILABLE: }switch (retval) { ... } memset(tstr, '0', len); tstr[len] = '\0'; return ERROR_FAIL; }{ ... } static int gdb_get_registers_packet(struct connection *connection, char const *packet, int packet_size) { struct target *target = get_target_from_connection(connection); struct reg **reg_list; int reg_list_size; int retval; int reg_packet_size = 0; char *reg_packet; char *reg_packet_p; int i; #ifdef _DEBUG_GDB_IO_ LOG_DEBUG("-"); #endif if ((target->rtos) && (rtos_get_gdb_reg_list(connection) == ERROR_OK)) return ERROR_OK; retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size, REG_CLASS_GENERAL); if (retval != ERROR_OK) return gdb_error(connection, retval); for (i = 0; i < reg_list_size; i++) { if (!reg_list[i] || reg_list[i]->exist == false || reg_list[i]->hidden) continue; reg_packet_size += DIV_ROUND_UP(reg_list[i]->size, 8) * 2; }for (i = 0; i < reg_list_size; i++) { ... } assert(reg_packet_size > 0); reg_packet = malloc(reg_packet_size + 1); /* plus one for string termination null */ if (!reg_packet) return ERROR_FAIL; reg_packet_p = reg_packet; for (i = 0; i < reg_list_size; i++) { if (!reg_list[i] || reg_list[i]->exist == false || reg_list[i]->hidden) continue; retval = gdb_get_reg_value_as_str(target, reg_packet_p, reg_list[i]); if (retval != ERROR_OK && gdb_report_register_access_error) { LOG_DEBUG("Couldn't get register %s.", reg_list[i]->name); free(reg_packet); free(reg_list); return gdb_error(connection, retval); }if (retval != ERROR_OK && gdb_report_register_access_error) { ... } reg_packet_p += DIV_ROUND_UP(reg_list[i]->size, 8) * 2; }for (i = 0; i < reg_list_size; i++) { ... } #ifdef _DEBUG_GDB_IO_ { char *reg_packet_p_debug; reg_packet_p_debug = strndup(reg_packet, reg_packet_size); LOG_DEBUG("reg_packet: %s", reg_packet_p_debug); free(reg_packet_p_debug); ...}/* ... */ #endif gdb_put_packet(connection, reg_packet, reg_packet_size); free(reg_packet); free(reg_list); return ERROR_OK; }{ ... } static int gdb_set_registers_packet(struct connection *connection, char const *packet, int packet_size) { struct target *target = get_target_from_connection(connection); int i; struct reg **reg_list; int reg_list_size; int retval; char const *packet_p; #ifdef _DEBUG_GDB_IO_ LOG_DEBUG("-"); #endif /* skip command character */ packet++; packet_size--; if (packet_size % 2) { LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (packet_size % 2) { ... } retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size, REG_CLASS_GENERAL); if (retval != ERROR_OK) return gdb_error(connection, retval); packet_p = packet; for (i = 0; i < reg_list_size; i++) { uint8_t *bin_buf; if (!reg_list[i] || !reg_list[i]->exist || reg_list[i]->hidden) continue; int chars = (DIV_ROUND_UP(reg_list[i]->size, 8) * 2); if (packet_p + chars > packet + packet_size) LOG_ERROR("BUG: register packet is too small for registers"); bin_buf = malloc(DIV_ROUND_UP(reg_list[i]->size, 8)); gdb_target_to_reg(target, packet_p, chars, bin_buf); retval = reg_list[i]->type->set(reg_list[i], bin_buf); if (retval != ERROR_OK && gdb_report_register_access_error) { LOG_DEBUG("Couldn't set register %s.", reg_list[i]->name); free(reg_list); free(bin_buf); return gdb_error(connection, retval); }if (retval != ERROR_OK && gdb_report_register_access_error) { ... } /* advance packet pointer */ packet_p += chars; free(bin_buf); }for (i = 0; i < reg_list_size; i++) { ... } /* free struct reg *reg_list[] array allocated by get_gdb_reg_list */ free(reg_list); gdb_put_packet(connection, "OK", 2); return ERROR_OK; }{ ... } static int gdb_get_register_packet(struct connection *connection, char const *packet, int packet_size) { struct target *target = get_target_from_connection(connection); char *reg_packet; int reg_num = strtoul(packet + 1, NULL, 16); struct reg **reg_list; int reg_list_size; int retval; #ifdef _DEBUG_GDB_IO_ LOG_DEBUG("-"); #endif if ((target->rtos) && (rtos_get_gdb_reg(connection, reg_num) == ERROR_OK)) return ERROR_OK; retval = target_get_gdb_reg_list_noread(target, &reg_list, &reg_list_size, REG_CLASS_ALL); if (retval != ERROR_OK) return gdb_error(connection, retval); if ((reg_list_size <= reg_num) || !reg_list[reg_num] || !reg_list[reg_num]->exist || reg_list[reg_num]->hidden) { LOG_ERROR("gdb requested a non-existing register (reg_num=%d)", reg_num); return ERROR_SERVER_REMOTE_CLOSED; }if ((reg_list_size <= reg_num) || !reg_list[reg_num] || !reg_list[reg_num]->exist || reg_list[reg_num]->hidden) { ... } reg_packet = calloc(DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2 + 1, 1); /* plus one for string termination null */ retval = gdb_get_reg_value_as_str(target, reg_packet, reg_list[reg_num]); if (retval != ERROR_OK && gdb_report_register_access_error) { LOG_DEBUG("Couldn't get register %s.", reg_list[reg_num]->name); free(reg_packet); free(reg_list); return gdb_error(connection, retval); }if (retval != ERROR_OK && gdb_report_register_access_error) { ... } gdb_put_packet(connection, reg_packet, DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2); free(reg_list); free(reg_packet); return ERROR_OK; }{ ... } static int gdb_set_register_packet(struct connection *connection, char const *packet, int packet_size) { struct target *target = get_target_from_connection(connection); char *separator; int reg_num = strtoul(packet + 1, &separator, 16); struct reg **reg_list; int reg_list_size; int retval; #ifdef _DEBUG_GDB_IO_ LOG_DEBUG("-"); #endif if (*separator != '=') { LOG_ERROR("GDB 'set register packet', but no '=' following the register number"); return ERROR_SERVER_REMOTE_CLOSED; }if (*separator != '=') { ... } size_t chars = strlen(separator + 1); uint8_t *bin_buf = malloc(chars / 2); gdb_target_to_reg(target, separator + 1, chars, bin_buf); if ((target->rtos) && (rtos_set_reg(connection, reg_num, bin_buf) == ERROR_OK)) { free(bin_buf); gdb_put_packet(connection, "OK", 2); return ERROR_OK; }if ((target->rtos) && (rtos_set_reg(connection, reg_num, bin_buf) == ERROR_OK)) { ... } retval = target_get_gdb_reg_list_noread(target, &reg_list, &reg_list_size, REG_CLASS_ALL); if (retval != ERROR_OK) { free(bin_buf); return gdb_error(connection, retval); }if (retval != ERROR_OK) { ... } if ((reg_list_size <= reg_num) || !reg_list[reg_num] || !reg_list[reg_num]->exist || reg_list[reg_num]->hidden) { LOG_ERROR("gdb requested a non-existing register (reg_num=%d)", reg_num); free(bin_buf); free(reg_list); return ERROR_SERVER_REMOTE_CLOSED; }if ((reg_list_size <= reg_num) || !reg_list[reg_num] || !reg_list[reg_num]->exist || reg_list[reg_num]->hidden) { ... } if (chars != (DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2)) { LOG_ERROR("gdb sent %zu bits for a %" PRIu32 "-bit register (%s)", chars * 4, reg_list[reg_num]->size, reg_list[reg_num]->name); free(bin_buf); free(reg_list); return ERROR_SERVER_REMOTE_CLOSED; }if (chars != (DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2)) { ... } gdb_target_to_reg(target, separator + 1, chars, bin_buf); retval = reg_list[reg_num]->type->set(reg_list[reg_num], bin_buf); if (retval != ERROR_OK && gdb_report_register_access_error) { LOG_DEBUG("Couldn't set register %s.", reg_list[reg_num]->name); free(bin_buf); free(reg_list); return gdb_error(connection, retval); }if (retval != ERROR_OK && gdb_report_register_access_error) { ... } gdb_put_packet(connection, "OK", 2); free(bin_buf); free(reg_list); 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) { LOG_DEBUG("Reporting %i to GDB as generic error", retval); gdb_send_error(connection, EFAULT); return ERROR_OK; }{ ... } static int gdb_read_memory_packet(struct connection *connection, char const *packet, int packet_size) { struct target *target = get_target_from_connection(connection); char *separator; uint64_t addr = 0; uint32_t len = 0; uint8_t *buffer; char *hex_buffer; int retval = ERROR_OK; /* skip command character */ packet++; addr = strtoull(packet, &separator, 16); if (*separator != ',') { LOG_ERROR("incomplete read memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*separator != ',') { ... } len = strtoul(separator + 1, NULL, 16); if (!len) { LOG_WARNING("invalid read memory packet received (len == 0)"); gdb_put_packet(connection, "", 0); return ERROR_OK; }if (!len) { ... } buffer = malloc(len); LOG_DEBUG("addr: 0x%16.16" PRIx64 ", len: 0x%8.8" PRIx32 "", addr, len); retval = ERROR_NOT_IMPLEMENTED; if (target->rtos) retval = rtos_read_buffer(target, addr, len, buffer); if (retval == ERROR_NOT_IMPLEMENTED) retval = target_read_buffer(target, addr, len, buffer); if ((retval != ERROR_OK) && !gdb_report_data_abort) { /* TODO : Here we have to lie and send back all zero's lest stack traces won't work. * At some point this might be fixed in GDB, in which case this code can be removed. * * OpenOCD developers are acutely aware of this problem, but there is nothing * gained by involving the user in this problem that hopefully will get resolved * eventually * * http://sourceware.org/cgi-bin/gnatsweb.pl? \ * cmd = view%20audit-trail&database = gdb&pr = 2395 * * For now, the default is to fix up things to make current GDB versions work. * This can be overwritten using the "gdb report_data_abort <'enable'|'disable'>" command. *//* ... */ memset(buffer, 0, len); retval = ERROR_OK; }if ((retval != ERROR_OK) && !gdb_report_data_abort) { ... } if (retval == ERROR_OK) { hex_buffer = malloc(len * 2 + 1); size_t pkt_len = hexify(hex_buffer, buffer, len, len * 2 + 1); gdb_put_packet(connection, hex_buffer, pkt_len); free(hex_buffer); }if (retval == ERROR_OK) { ... } else retval = gdb_error(connection, retval); free(buffer); return retval; }{ ... } static int gdb_write_memory_packet(struct connection *connection, char const *packet, int packet_size) { struct target *target = get_target_from_connection(connection); char *separator; uint64_t addr = 0; uint32_t len = 0; uint8_t *buffer; int retval; /* skip command character */ packet++; addr = strtoull(packet, &separator, 16); if (*separator != ',') { LOG_ERROR("incomplete write memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*separator != ',') { ... } len = strtoul(separator + 1, &separator, 16); if (*(separator++) != ':') { LOG_ERROR("incomplete write memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*(separator++) != ':') { ... } buffer = malloc(len); LOG_DEBUG("addr: 0x%" PRIx64 ", len: 0x%8.8" PRIx32 "", addr, len); if (unhexify(buffer, separator, len) != len) LOG_ERROR("unable to decode memory packet"); retval = ERROR_NOT_IMPLEMENTED; if (target->rtos) retval = rtos_write_buffer(target, addr, len, buffer); if (retval == ERROR_NOT_IMPLEMENTED) retval = target_write_buffer(target, addr, len, buffer); if (retval == ERROR_OK) gdb_put_packet(connection, "OK", 2); else retval = gdb_error(connection, retval); free(buffer); return retval; }{ ... } static int gdb_write_memory_binary_packet(struct connection *connection, char const *packet, int packet_size) { struct target *target = get_target_from_connection(connection); char *separator; uint64_t addr = 0; uint32_t len = 0; int retval = ERROR_OK; /* Packets larger than fast_limit bytes will be acknowledged instantly on * the assumption that we're in a download and it's important to go as fast * as possible. *//* ... */ uint32_t fast_limit = 8; /* skip command character */ packet++; addr = strtoull(packet, &separator, 16); if (*separator != ',') { LOG_ERROR("incomplete write memory binary packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*separator != ',') { ... } len = strtoul(separator + 1, &separator, 16); if (*(separator++) != ':') { LOG_ERROR("incomplete write memory binary packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*(separator++) != ':') { ... } struct gdb_connection *gdb_connection = connection->priv; if (gdb_connection->mem_write_error) retval = ERROR_FAIL; if (retval == ERROR_OK) { if (len >= fast_limit) { /* By replying the packet *immediately* GDB will send us a new packet * while we write the last one to the target. * We only do this for larger writes, so that users who do something like: * p *((int*)0xdeadbeef)=8675309 * will get immediate feedback that that write failed. *//* ... */ gdb_put_packet(connection, "OK", 2); }if (len >= fast_limit) { ... } }if (retval == ERROR_OK) { ... } else { retval = gdb_error(connection, retval); /* now that we have reported the memory write error, we can clear the condition */ gdb_connection->mem_write_error = false; if (retval != ERROR_OK) return retval; }else { ... } if (len) { LOG_DEBUG("addr: 0x%" PRIx64 ", len: 0x%8.8" PRIx32 "", addr, len); retval = ERROR_NOT_IMPLEMENTED; if (target->rtos) retval = rtos_write_buffer(target, addr, len, (uint8_t *)separator); if (retval == ERROR_NOT_IMPLEMENTED) retval = target_write_buffer(target, addr, len, (uint8_t *)separator); if (retval != ERROR_OK) gdb_connection->mem_write_error = true; }if (len) { ... } if (len < fast_limit) { if (retval != ERROR_OK) { gdb_error(connection, retval); gdb_connection->mem_write_error = false; }if (retval != ERROR_OK) { ... } else { gdb_put_packet(connection, "OK", 2); }else { ... } }if (len < fast_limit) { ... } return ERROR_OK; }{ ... } static int gdb_step_continue_packet(struct connection *connection, char const *packet, int packet_size) { struct target *target = get_target_from_connection(connection); int current = 0; uint64_t address = 0x0; int retval = ERROR_OK; LOG_DEBUG("-"); if (packet_size > 1) address = strtoull(packet + 1, NULL, 16); else current = 1; if (target->frozen && target->smp) { struct target_list *head; foreach_smp_target(head, target->smp_targets) { struct target *pThisTarget = head->target; if (!pThisTarget) continue; if (!pThisTarget->frozen) { target = pThisTarget; break; }if (!pThisTarget->frozen) { ... } }foreach_smp_target (head, target->smp_targets) { ... } }if (target->frozen && target->smp) { ... } gdb_running_type = packet[0]; if (packet[0] == 'c') { LOG_DEBUG("continue"); /* resume at current address, don't handle breakpoints, not debugging */ retval = target_resume(target, current, address, 0, 0); }if (packet[0] == 'c') { ... } else if (packet[0] == 's') { LOG_DEBUG("step"); /* step at current or address, don't handle breakpoints */ retval = target_step(target, current, address, 0); }else if (packet[0] == 's') { ... } return retval; }{ ... } static int gdb_breakpoint_watchpoint_packet(struct connection *connection, char const *packet, int packet_size) { struct target *target = get_target_from_connection(connection); int type; enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */; enum watchpoint_rw wp_type = WPT_READ /* dummy init to avoid warning */; uint64_t address; uint32_t size; char *separator; int retval; LOG_DEBUG("[%s]", target_name(target)); 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; else { LOG_ERROR("invalid gdb watch/breakpoint type(%d), dropping connection", type); return ERROR_SERVER_REMOTE_CLOSED; }else { ... } if (gdb_breakpoint_override && ((bp_type == BKPT_SOFT) || (bp_type == BKPT_HARD))) bp_type = gdb_breakpoint_override_type; if (*separator != ',') { LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*separator != ',') { ... } address = strtoull(separator + 1, &separator, 16); if (*separator != ',') { LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*separator != ',') { ... } size = strtoul(separator + 1, &separator, 16); switch (type) { case 0: case 1: if (packet[0] == 'Z') { retval = breakpoint_add(target, address, size, bp_type); if (retval == ERROR_NOT_IMPLEMENTED) { /* Send empty reply to report that breakpoints of this type are not supported */ gdb_put_packet(connection, "", 0); }if (retval == ERROR_NOT_IMPLEMENTED) { ... } else if (retval != ERROR_OK) { retval = gdb_error(connection, retval); if (retval != ERROR_OK) return retval; }else if (retval != ERROR_OK) { ... } else gdb_put_packet(connection, "OK", 2); }if (packet[0] == 'Z') { ... } else { breakpoint_remove(target, address); gdb_put_packet(connection, "OK", 2); }else { ... } break;case 1: case 2: case 3: case 4: { if (packet[0] == 'Z') { retval = watchpoint_add(target, address, size, wp_type, 0, WATCHPOINT_IGNORE_DATA_VALUE_MASK); if (retval == ERROR_NOT_IMPLEMENTED) { /* Send empty reply to report that watchpoints of this type are not supported */ gdb_put_packet(connection, "", 0); }if (retval == ERROR_NOT_IMPLEMENTED) { ... } else if (retval != ERROR_OK) { retval = gdb_error(connection, retval); if (retval != ERROR_OK) return retval; }else if (retval != ERROR_OK) { ... } else gdb_put_packet(connection, "OK", 2); }if (packet[0] == 'Z') { ... } else { watchpoint_remove(target, address); gdb_put_packet(connection, "OK", 2); }else { ... } break; ...}case 4: default: break;default }switch (type) { ... } return ERROR_OK; }{ ... } /* print out a string and allocate more space as needed, * mainly used for XML at this point *//* ... */ static __attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT, 5, 6))) 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) || (!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) { free(t); *retval = ERROR_SERVER_REMOTE_CLOSED; return; }if (!*xml) { ... } }if ((!*xml) || (!first)) { ... } 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; }if ((ret > 0) && ((ret + 1) < *size - *pos)) { ... } /* there was just enough or not enough space, allocate more. */ first = 0; }for (;;) { ... } }{ ... } static int decode_xfer_read(char const *buf, char **annex, int *ofs, unsigned int *len) { /* Locate the annex. */ const char *annex_end = strchr(buf, ':'); if (!annex_end) return ERROR_FAIL; /* After the read marker and annex, qXfer looks like a * traditional 'm' packet. *//* ... */ char *separator; *ofs = strtoul(annex_end + 1, &separator, 16); if (*separator != ',') return ERROR_FAIL; *len = strtoul(separator + 1, NULL, 16); /* Extract the annex if needed */ if (annex) { *annex = strndup(buf, annex_end - buf); if (!*annex) return ERROR_FAIL; }if (annex) { ... } return ERROR_OK; }{ ... } static int compare_bank(const void *a, const void *b) { struct flash_bank *b1, *b2; b1 = *((struct flash_bank **)a); b2 = *((struct flash_bank **)b); if (b1->base == b2->base) return 0; else if (b1->base > b2->base) return 1; else return -1; }{ ... } extern struct target_type mips_m4k_target; static target_addr_t extend_address_for_gdb(struct target *target, target_addr_t address) { /* This is a workaround to memory accessing problems on the MIPS32 architecture (specifically, PIC32) explained below: 1. GDB 10.2 unconditionally defines CORE_ADDR (target address) as uint64_t in gdbsupport/common-types.h: typedef uint64_t CORE_ADDR; 2. By default, gdb uses unsigned address extension. See gdbarch.c: gdbarch->pointer_to_address = unsigned_pointer_to_address; 3. MIPS implementation in gdb specifically overrides it to signed extension. See mips-tdep.c: set_gdbarch_pointer_to_address (gdbarch, signed_pointer_to_address); As a result, target addresses on the GDB side are sign-extended, and when they are matched against zero-extended memory map reported by OpenOCD, gdb finds no matching memory regions and aborts the memory access operation. We work around it by sign-extending the memory region addresses reported to gdb to match the gdb behavior. *//* ... */ if (target->gdb_sign_extends_addresses) { if ((address & 0xFFFFFFFF80000000ULL) == 0x80000000) address |= 0xFFFFFFFF00000000ULL; }if (target->gdb_sign_extends_addresses) { ... } return address; }{ ... } static int gdb_memory_map(struct connection *connection, char const *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 target *target = get_target_from_connection(connection); 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; target_addr_t ram_start = 0; unsigned 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, "<memory-map>\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). *//* ... */ banks = malloc(sizeof(struct flash_bank *)*flash_get_bank_count()); for (unsigned int i = 0; i < flash_get_bank_count(); i++) { p = get_flash_bank_by_num_noprobe(i); if (p->target != target) continue; retval = get_flash_bank_by_num(i, &p); if (retval != ERROR_OK) { free(banks); gdb_error(connection, retval); return retval; }if (retval != ERROR_OK) { ... } banks[target_flash_banks++] = p; }for (unsigned int i = 0; i < flash_get_bank_count(); i++) { ... } qsort(banks, target_flash_banks, sizeof(struct flash_bank *), compare_bank); for (unsigned int i = 0; i < target_flash_banks; i++) { unsigned sector_size = 0; unsigned group_len = 0; p = banks[i]; target_addr_t extended_base = extend_address_for_gdb(target, p->base); if (ram_start < extended_base) xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"" TARGET_ADDR_FMT "\" " "length=\"" TARGET_ADDR_FMT "\"/>\n", ram_start, extended_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 (unsigned int j = 0; j < p->num_sectors; j++) { /* Maybe start a new group of sectors. */ if (sector_size == 0) { if (p->sectors[j].offset + p->sectors[j].size > p->size) { LOG_WARNING("The flash sector at offset 0x%08" PRIx32 " overflows the end of %s bank.", p->sectors[j].offset, p->name); LOG_WARNING("The rest of bank will not show in gdb memory map."); break; }if (p->sectors[j].offset + p->sectors[j].size > p->size) { ... } target_addr_t start; start = extended_base + p->sectors[j].offset; xml_printf(&retval, &xml, &pos, &size, "<memory type=\"flash\" " "start=\"" TARGET_ADDR_FMT "\" ", start); sector_size = p->sectors[j].size; group_len = sector_size; }if (sector_size == 0) { ... } else { group_len += sector_size; /* equal to p->sectors[j].size */ }else { ... } /* Does this finish a group of sectors? * If not, continue an already-started group. *//* ... */ if (j < p->num_sectors - 1 && p->sectors[j + 1].size == sector_size && p->sectors[j + 1].offset == p->sectors[j].offset + sector_size && p->sectors[j + 1].offset + p->sectors[j + 1].size <= p->size) continue; xml_printf(&retval, &xml, &pos, &size, "length=\"0x%x\">\n" "<property name=\"blocksize\">" "0x%x</property>\n" "</memory>\n", group_len, sector_size); sector_size = 0; }for (unsigned int j = 0; j < p->num_sectors; j++) { ... } ram_start = extended_base + p->size; }for (unsigned int i = 0; i < target_flash_banks; i++) { ... } if (ram_start != 0) xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"" TARGET_ADDR_FMT "\" " "length=\"" TARGET_ADDR_FMT "\"/>\n", ram_start, extend_address_for_gdb(target, target_address_max(target)) - ram_start + 1); /* ELSE a flash chip could be at the very end of the address space, in * which case ram_start will be precisely 0 *//* ... */ free(banks); xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n"); if (retval != ERROR_OK) { free(xml); gdb_error(connection, retval); return retval; }if (retval != ERROR_OK) { ... } 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 const char *gdb_get_reg_type_name(enum reg_type type) { switch (type) { case REG_TYPE_BOOL: return "bool";case REG_TYPE_BOOL: case REG_TYPE_INT: return "int";case REG_TYPE_INT: case REG_TYPE_INT8: return "int8";case REG_TYPE_INT8: case REG_TYPE_INT16: return "int16";case REG_TYPE_INT16: case REG_TYPE_INT32: return "int32";case REG_TYPE_INT32: case REG_TYPE_INT64: return "int64";case REG_TYPE_INT64: case REG_TYPE_INT128: return "int128";case REG_TYPE_INT128: case REG_TYPE_UINT: return "uint";case REG_TYPE_UINT: case REG_TYPE_UINT8: return "uint8";case REG_TYPE_UINT8: case REG_TYPE_UINT16: return "uint16";case REG_TYPE_UINT16: case REG_TYPE_UINT32: return "uint32";case REG_TYPE_UINT32: case REG_TYPE_UINT64: return "uint64";case REG_TYPE_UINT64: case REG_TYPE_UINT128: return "uint128";case REG_TYPE_UINT128: case REG_TYPE_CODE_PTR: return "code_ptr";case REG_TYPE_CODE_PTR: case REG_TYPE_DATA_PTR: return "data_ptr";case REG_TYPE_DATA_PTR: case REG_TYPE_FLOAT: return "float";case REG_TYPE_FLOAT: case REG_TYPE_IEEE_SINGLE: return "ieee_single";case REG_TYPE_IEEE_SINGLE: case REG_TYPE_IEEE_DOUBLE: return "ieee_double";case REG_TYPE_IEEE_DOUBLE: case REG_TYPE_ARCH_DEFINED: return "int"; /* return arbitrary string to avoid compile warning. */case REG_TYPE_ARCH_DEFINED: }switch (type) { ... } return "int"; /* "int" as default value */ }{ ... } static int lookup_add_arch_defined_types(char const **arch_defined_types_list[], const char *type_id, int *num_arch_defined_types) { int tbl_sz = *num_arch_defined_types; if (type_id && (strcmp(type_id, ""))) { for (int j = 0; j < (tbl_sz + 1); j++) { if (!((*arch_defined_types_list)[j])) { (*arch_defined_types_list)[tbl_sz++] = type_id; *arch_defined_types_list = realloc(*arch_defined_types_list, sizeof(char *) * (tbl_sz + 1)); (*arch_defined_types_list)[tbl_sz] = NULL; *num_arch_defined_types = tbl_sz; return 1; }if (!((*arch_defined_types_list)[j])) { ... } else { if (!strcmp((*arch_defined_types_list)[j], type_id)) return 0; }else { ... } }for (int j = 0; j < (tbl_sz + 1); j++) { ... } }if (type_id && (strcmp(type_id, ""))) { ... } return -1; }{ ... } static int gdb_generate_reg_type_description(struct target *target, char **tdesc, int *pos, int *size, struct reg_data_type *type, char const **arch_defined_types_list[], int *num_arch_defined_types) { int retval = ERROR_OK; if (type->type_class == REG_TYPE_CLASS_VECTOR) { struct reg_data_type *data_type = type->reg_type_vector->type; if (data_type->type == REG_TYPE_ARCH_DEFINED) { if (lookup_add_arch_defined_types(arch_defined_types_list, data_type->id, num_arch_defined_types)) gdb_generate_reg_type_description(target, tdesc, pos, size, data_type, arch_defined_types_list, num_arch_defined_types); }if (data_type->type == REG_TYPE_ARCH_DEFINED) { ... } /* <vector id="id" type="type" count="count"/> */ xml_printf(&retval, tdesc, pos, size, "<vector id=\"%s\" type=\"%s\" count=\"%" PRIu32 "\"/>\n", type->id, type->reg_type_vector->type->id, type->reg_type_vector->count); }if (type->type_class == REG_TYPE_CLASS_VECTOR) { ... } else if (type->type_class == REG_TYPE_CLASS_UNION) { struct reg_data_type_union_field *field; field = type->reg_type_union->fields; while (field) { struct reg_data_type *data_type = field->type; if (data_type->type == REG_TYPE_ARCH_DEFINED) { if (lookup_add_arch_defined_types(arch_defined_types_list, data_type->id, num_arch_defined_types)) gdb_generate_reg_type_description(target, tdesc, pos, size, data_type, arch_defined_types_list, num_arch_defined_types); }if (data_type->type == REG_TYPE_ARCH_DEFINED) { ... } field = field->next; }while (field) { ... } /* <union id="id"> * <field name="name" type="type"/> ... * </union> *//* ... */ xml_printf(&retval, tdesc, pos, size, "<union id=\"%s\">\n", type->id); field = type->reg_type_union->fields; while (field) { xml_printf(&retval, tdesc, pos, size, "<field name=\"%s\" type=\"%s\"/>\n", field->name, field->type->id); field = field->next; }while (field) { ... } xml_printf(&retval, tdesc, pos, size, "</union>\n"); }else if (type->type_class == REG_TYPE_CLASS_UNION) { ... } else if (type->type_class == REG_TYPE_CLASS_STRUCT) { struct reg_data_type_struct_field *field; field = type->reg_type_struct->fields; if (field->use_bitfields) { /* <struct id="id" size="size"> * <field name="name" start="start" end="end"/> ... * </struct> *//* ... */ xml_printf(&retval, tdesc, pos, size, "<struct id=\"%s\" size=\"%" PRIu32 "\">\n", type->id, type->reg_type_struct->size); while (field) { xml_printf(&retval, tdesc, pos, size, "<field name=\"%s\" start=\"%" PRIu32 "\" end=\"%" PRIu32 "\" type=\"%s\" />\n", field->name, field->bitfield->start, field->bitfield->end, gdb_get_reg_type_name(field->bitfield->type)); field = field->next; }while (field) { ... } }if (field->use_bitfields) { ... } else { while (field) { struct reg_data_type *data_type = field->type; if (data_type->type == REG_TYPE_ARCH_DEFINED) { if (lookup_add_arch_defined_types(arch_defined_types_list, data_type->id, num_arch_defined_types)) gdb_generate_reg_type_description(target, tdesc, pos, size, data_type, arch_defined_types_list, num_arch_defined_types); }if (data_type->type == REG_TYPE_ARCH_DEFINED) { ... } }while (field) { ... } /* <struct id="id"> * <field name="name" type="type"/> ... * </struct> *//* ... */ xml_printf(&retval, tdesc, pos, size, "<struct id=\"%s\">\n", type->id); while (field) { xml_printf(&retval, tdesc, pos, size, "<field name=\"%s\" type=\"%s\"/>\n", field->name, field->type->id); field = field->next; }while (field) { ... } }else { ... } xml_printf(&retval, tdesc, pos, size, "</struct>\n"); }else if (type->type_class == REG_TYPE_CLASS_STRUCT) { ... } else if (type->type_class == REG_TYPE_CLASS_FLAGS) { /* <flags id="id" size="size"> * <field name="name" start="start" end="end"/> ... * </flags> *//* ... */ xml_printf(&retval, tdesc, pos, size, "<flags id=\"%s\" size=\"%" PRIu32 "\">\n", type->id, type->reg_type_flags->size); struct reg_data_type_flags_field *field; field = type->reg_type_flags->fields; while (field) { xml_printf(&retval, tdesc, pos, size, "<field name=\"%s\" start=\"%" PRIu32 "\" end=\"%" PRIu32 "\" type=\"%s\" />\n", field->name, field->bitfield->start, field->bitfield->end, gdb_get_reg_type_name(field->bitfield->type)); field = field->next; }while (field) { ... } xml_printf(&retval, tdesc, pos, size, "</flags>\n"); }else if (type->type_class == REG_TYPE_CLASS_FLAGS) { ... } return ERROR_OK; }{ ... } /* Get a list of available target registers features. feature_list must * be freed by caller. *//* ... */ static int get_reg_features_list(struct target *target, char const **feature_list[], int *feature_list_size, struct reg **reg_list, int reg_list_size) { int tbl_sz = 0; /* Start with only one element */ *feature_list = calloc(1, sizeof(char *)); for (int i = 0; i < reg_list_size; i++) { if (reg_list[i]->exist == false || reg_list[i]->hidden) continue; if (reg_list[i]->feature && reg_list[i]->feature->name && (strcmp(reg_list[i]->feature->name, ""))) { /* We found a feature, check if the feature is already in the * table. If not, allocate a new entry for the table and * put the new feature in it. *//* ... */ for (int j = 0; j < (tbl_sz + 1); j++) { if (!((*feature_list)[j])) { (*feature_list)[tbl_sz++] = reg_list[i]->feature->name; *feature_list = realloc(*feature_list, sizeof(char *) * (tbl_sz + 1)); (*feature_list)[tbl_sz] = NULL; break; }if (!((*feature_list)[j])) { ... } else { if (!strcmp((*feature_list)[j], reg_list[i]->feature->name)) break; }else { ... } }for (int j = 0; j < (tbl_sz + 1); j++) { ... } }if (reg_list[i]->feature && reg_list[i]->feature->name && (strcmp(reg_list[i]->feature->name, ""))) { ... } }for (int i = 0; i < reg_list_size; i++) { ... } if (feature_list_size) *feature_list_size = tbl_sz; return ERROR_OK; }{ ... } /* Create a register list that's the union of all the registers of the SMP * group this target is in. If the target is not part of an SMP group, this * returns the same as target_get_gdb_reg_list_noread(). *//* ... */ static int smp_reg_list_noread(struct target *target, struct reg **combined_list[], int *combined_list_size, enum target_register_class reg_class) { if (!target->smp) return target_get_gdb_reg_list_noread(target, combined_list, combined_list_size, REG_CLASS_ALL); unsigned int combined_allocated = 256; struct reg **local_list = malloc(combined_allocated * sizeof(struct reg *)); if (!local_list) { LOG_ERROR("malloc(%zu) failed", combined_allocated * sizeof(struct reg *)); return ERROR_FAIL; }if (!local_list) { ... } unsigned int local_list_size = 0; struct target_list *head; foreach_smp_target(head, target->smp_targets) { if (!target_was_examined(head->target)) continue; struct reg **reg_list = NULL; int reg_list_size; int result = target_get_gdb_reg_list_noread(head->target, &reg_list, &reg_list_size, reg_class); if (result != ERROR_OK) { free(local_list); return result; }if (result != ERROR_OK) { ... } for (int i = 0; i < reg_list_size; i++) { bool found = false; struct reg *a = reg_list[i]; if (a->exist) { /* Nested loop makes this O(n^2), but this entire function with * 5 RISC-V targets takes just 2ms on my computer. Fast enough * for me. *//* ... */ for (unsigned int j = 0; j < local_list_size; j++) { struct reg *b = local_list[j]; if (!strcmp(a->name, b->name)) { found = true; if (a->size != b->size) { LOG_ERROR("SMP register %s is %d bits on one " "target, but %d bits on another target.", a->name, a->size, b->size); free(reg_list); free(local_list); return ERROR_FAIL; }if (a->size != b->size) { ... } break; }if (!strcmp(a->name, b->name)) { ... } }for (unsigned int j = 0; j < local_list_size; j++) { ... } if (!found) { LOG_TARGET_DEBUG(target, "%s not found in combined list", a->name); if (local_list_size >= combined_allocated) { combined_allocated *= 2; local_list = realloc(local_list, combined_allocated * sizeof(struct reg *)); if (!local_list) { LOG_ERROR("realloc(%zu) failed", combined_allocated * sizeof(struct reg *)); free(reg_list); return ERROR_FAIL; }if (!local_list) { ... } }if (local_list_size >= combined_allocated) { ... } local_list[local_list_size] = a; local_list_size++; }if (!found) { ... } }if (a->exist) { ... } }for (int i = 0; i < reg_list_size; i++) { ... } free(reg_list); }foreach_smp_target (head, target->smp_targets) { ... } if (local_list_size == 0) { LOG_ERROR("Unable to get register list"); free(local_list); return ERROR_FAIL; }if (local_list_size == 0) { ... } /* Now warn the user about any registers that weren't found in every target. */ foreach_smp_target(head, target->smp_targets) { if (!target_was_examined(head->target)) continue; struct reg **reg_list = NULL; int reg_list_size; int result = target_get_gdb_reg_list_noread(head->target, &reg_list, &reg_list_size, reg_class); if (result != ERROR_OK) { free(local_list); return result; }if (result != ERROR_OK) { ... } for (unsigned int i = 0; i < local_list_size; i++) { bool found = false; struct reg *a = local_list[i]; for (int j = 0; j < reg_list_size; j++) { struct reg *b = reg_list[j]; if (b->exist && !strcmp(a->name, b->name)) { found = true; break; }if (b->exist && !strcmp(a->name, b->name)) { ... } }for (int j = 0; j < reg_list_size; j++) { ... } if (!found) { LOG_TARGET_WARNING(head->target, "Register %s does not exist, which is part of an SMP group where " "this register does exist.", a->name); }if (!found) { ... } }for (unsigned int i = 0; i < local_list_size; i++) { ... } free(reg_list); }foreach_smp_target (head, target->smp_targets) { ... } *combined_list = local_list; *combined_list_size = local_list_size; return ERROR_OK; }{ ... } static int gdb_generate_target_description(struct target *target, char **tdesc_out) { int retval = ERROR_OK; struct reg **reg_list = NULL; int reg_list_size; char const *architecture; char const **features = NULL; int feature_list_size = 0; char *tdesc = NULL; int pos = 0; int size = 0; retval = smp_reg_list_noread(target, &reg_list, &reg_list_size, REG_CLASS_ALL); if (retval != ERROR_OK) { LOG_ERROR("get register list failed"); retval = ERROR_FAIL; goto error; }if (retval != ERROR_OK) { ... } if (reg_list_size <= 0) { LOG_ERROR("get register list failed"); retval = ERROR_FAIL; goto error; }if (reg_list_size <= 0) { ... } /* Get a list of available target registers features */ retval = get_reg_features_list(target, &features, &feature_list_size, reg_list, reg_list_size); if (retval != ERROR_OK) { LOG_ERROR("Can't get the registers feature list"); retval = ERROR_FAIL; goto error; }if (retval != ERROR_OK) { ... } /* If we found some features associated with registers, create sections */ int current_feature = 0; xml_printf(&retval, &tdesc, &pos, &size, "<?xml version=\"1.0\"?>\n" "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">\n" "<target version=\"1.0\">\n"); /* generate architecture element if supported by target */ architecture = target_get_gdb_arch(target); if (architecture) xml_printf(&retval, &tdesc, &pos, &size, "<architecture>%s</architecture>\n", architecture); /* generate target description according to register list */ if (features) { while (features[current_feature]) { char const **arch_defined_types = NULL; int num_arch_defined_types = 0; arch_defined_types = calloc(1, sizeof(char *)); xml_printf(&retval, &tdesc, &pos, &size, "<feature name=\"%s\">\n", features[current_feature]); int i; for (i = 0; i < reg_list_size; i++) { if (reg_list[i]->exist == false || reg_list[i]->hidden) continue; if (strcmp(reg_list[i]->feature->name, features[current_feature])) continue; const char *type_str; if (reg_list[i]->reg_data_type) { if (reg_list[i]->reg_data_type->type == REG_TYPE_ARCH_DEFINED) { /* generate <type... first, if there are architecture-defined types. */ if (lookup_add_arch_defined_types(&arch_defined_types, reg_list[i]->reg_data_type->id, &num_arch_defined_types)) gdb_generate_reg_type_description(target, &tdesc, &pos, &size, reg_list[i]->reg_data_type, &arch_defined_types, &num_arch_defined_types); type_str = reg_list[i]->reg_data_type->id; }if (reg_list[i]->reg_data_type->type == REG_TYPE_ARCH_DEFINED) { ... } else { /* predefined type */ type_str = gdb_get_reg_type_name( reg_list[i]->reg_data_type->type); }else { ... } }if (reg_list[i]->reg_data_type) { ... } else { /* Default type is "int" */ type_str = "int"; }else { ... } xml_printf(&retval, &tdesc, &pos, &size, "<reg name=\"%s\"", reg_list[i]->name); xml_printf(&retval, &tdesc, &pos, &size, " bitsize=\"%" PRIu32 "\"", reg_list[i]->size); xml_printf(&retval, &tdesc, &pos, &size, " regnum=\"%" PRIu32 "\"", reg_list[i]->number); if (reg_list[i]->caller_save) xml_printf(&retval, &tdesc, &pos, &size, " save-restore=\"yes\""); else xml_printf(&retval, &tdesc, &pos, &size, " save-restore=\"no\""); xml_printf(&retval, &tdesc, &pos, &size, " type=\"%s\"", type_str); if (reg_list[i]->group) xml_printf(&retval, &tdesc, &pos, &size, " group=\"%s\"", reg_list[i]->group); xml_printf(&retval, &tdesc, &pos, &size, "/>\n"); }for (i = 0; i < reg_list_size; i++) { ... } xml_printf(&retval, &tdesc, &pos, &size, "</feature>\n"); current_feature++; free(arch_defined_types); }while (features[current_feature]) { ... } }if (features) { ... } xml_printf(&retval, &tdesc, &pos, &size, "</target>\n"); error: free(features); free(reg_list); if (retval == ERROR_OK) *tdesc_out = tdesc; else free(tdesc); return retval; }{ ... } static int gdb_get_target_description_chunk(struct target *target, struct target_desc_format *target_desc, char **chunk, int32_t offset, uint32_t length) { if (!target_desc) { LOG_ERROR("Unable to Generate Target Description"); return ERROR_FAIL; }if (!target_desc) { ... } char *tdesc = target_desc->tdesc; uint32_t tdesc_length = target_desc->tdesc_length; if (!tdesc) { int retval = gdb_generate_target_description(target, &tdesc); if (retval != ERROR_OK) { LOG_ERROR("Unable to Generate Target Description"); return ERROR_FAIL; }if (retval != ERROR_OK) { ... } tdesc_length = strlen(tdesc); }if (!tdesc) { ... } char transfer_type; if (length < (tdesc_length - offset)) transfer_type = 'm'; else transfer_type = 'l'; *chunk = malloc(length + 2); if (!*chunk) { LOG_ERROR("Unable to allocate memory"); return ERROR_FAIL; }if (!*chunk) { ... } (*chunk)[0] = transfer_type; if (transfer_type == 'm') { strncpy((*chunk) + 1, tdesc + offset, length); (*chunk)[1 + length] = '\0'; }if (transfer_type == 'm') { ... } else { strncpy((*chunk) + 1, tdesc + offset, tdesc_length - offset); (*chunk)[1 + (tdesc_length - offset)] = '\0'; /* After gdb-server sends out last chunk, invalidate tdesc. */ free(tdesc); tdesc = NULL; tdesc_length = 0; }else { ... } target_desc->tdesc = tdesc; target_desc->tdesc_length = tdesc_length; return ERROR_OK; }{ ... } static int gdb_target_description_supported(struct target *target, bool *supported) { int retval = ERROR_OK; struct reg **reg_list = NULL; int reg_list_size = 0; char const **features = NULL; int feature_list_size = 0; char const *architecture = target_get_gdb_arch(target); retval = target_get_gdb_reg_list_noread(target, &reg_list, &reg_list_size, REG_CLASS_ALL); if (retval != ERROR_OK) { LOG_ERROR("get register list failed"); goto error; }if (retval != ERROR_OK) { ... } if (reg_list_size <= 0) { LOG_ERROR("get register list failed"); retval = ERROR_FAIL; goto error; }if (reg_list_size <= 0) { ... } /* Get a list of available target registers features */ retval = get_reg_features_list(target, &features, &feature_list_size, reg_list, reg_list_size); if (retval != ERROR_OK) { LOG_ERROR("Can't get the registers feature list"); goto error; }if (retval != ERROR_OK) { ... } if (supported) { if (architecture || feature_list_size) *supported = true; else *supported = false; }if (supported) { ... } error: free(features); free(reg_list); return retval; }{ ... } static int gdb_generate_thread_list(struct target *target, char **thread_list_out) { struct rtos *rtos = target->rtos; int retval = ERROR_OK; char *thread_list = NULL; int pos = 0; int size = 0; xml_printf(&retval, &thread_list, &pos, &size, "<?xml version=\"1.0\"?>\n" "<threads>\n"); if (rtos) { for (int i = 0; i < rtos->thread_count; i++) { struct thread_detail *thread_detail = &rtos->thread_details[i]; if (!thread_detail->exists) continue; if (thread_detail->thread_name_str) xml_printf(&retval, &thread_list, &pos, &size, "<thread id=\"%" PRIx64 "\" name=\"%s\">", thread_detail->threadid, thread_detail->thread_name_str); else xml_printf(&retval, &thread_list, &pos, &size, "<thread id=\"%" PRIx64 "\">", thread_detail->threadid); if (thread_detail->thread_name_str) xml_printf(&retval, &thread_list, &pos, &size, "Name: %s", thread_detail->thread_name_str); if (thread_detail->extra_info_str) { if (thread_detail->thread_name_str) xml_printf(&retval, &thread_list, &pos, &size, ", "); xml_printf(&retval, &thread_list, &pos, &size, "%s", thread_detail->extra_info_str); }if (thread_detail->extra_info_str) { ... } xml_printf(&retval, &thread_list, &pos, &size, "</thread>\n"); }for (int i = 0; i < rtos->thread_count; i++) { ... } }if (rtos) { ... } xml_printf(&retval, &thread_list, &pos, &size, "</threads>\n"); if (retval == ERROR_OK) *thread_list_out = thread_list; else free(thread_list); return retval; }{ ... } static int gdb_get_thread_list_chunk(struct target *target, char **thread_list, char **chunk, int32_t offset, uint32_t length) { if (!*thread_list) { int retval = gdb_generate_thread_list(target, thread_list); if (retval != ERROR_OK) { LOG_ERROR("Unable to Generate Thread List"); return ERROR_FAIL; }if (retval != ERROR_OK) { ... } }if (!*thread_list) { ... } size_t thread_list_length = strlen(*thread_list); char transfer_type; length = MIN(length, thread_list_length - offset); if (length < (thread_list_length - offset)) transfer_type = 'm'; else transfer_type = 'l'; *chunk = malloc(length + 2 + 3); /* Allocating extra 3 bytes prevents false positive valgrind report * of strlen(chunk) word access: * Invalid read of size 4 * Address 0x4479934 is 44 bytes inside a block of size 45 alloc'd *//* ... */ if (!*chunk) { LOG_ERROR("Unable to allocate memory"); return ERROR_FAIL; }if (!*chunk) { ... } (*chunk)[0] = transfer_type; strncpy((*chunk) + 1, (*thread_list) + offset, length); (*chunk)[1 + length] = '\0'; /* After gdb-server sends out last chunk, invalidate thread list. */ if (transfer_type == 'l') { free(*thread_list); *thread_list = NULL; }if (transfer_type == 'l') { ... } return ERROR_OK; }{ ... } static int gdb_query_packet(struct connection *connection, char const *packet, int packet_size) { struct command_context *cmd_ctx = connection->cmd_ctx; struct gdb_connection *gdb_connection = connection->priv; struct target *target = get_target_from_connection(connection); if (strncmp(packet, "qRcmd,", 6) == 0) { if (packet_size > 6) { Jim_Interp *interp = cmd_ctx->interp; char *cmd; cmd = malloc((packet_size - 6) / 2 + 1); size_t len = unhexify((uint8_t *)cmd, packet + 6, (packet_size - 6) / 2); cmd[len] = 0; /* We want to print all debug output to GDB connection */ gdb_connection->output_flag = GDB_OUTPUT_ALL; target_call_timer_callbacks_now(); /* some commands need to know the GDB connection, make note of current * GDB connection. *//* ... */ current_gdb_connection = gdb_connection; struct target *saved_target_override = cmd_ctx->current_target_override; cmd_ctx->current_target_override = NULL; struct command_context *old_context = Jim_GetAssocData(interp, "context"); Jim_DeleteAssocData(interp, "context"); int retval = Jim_SetAssocData(interp, "context", NULL, cmd_ctx); if (retval == JIM_OK) { retval = Jim_EvalObj(interp, Jim_NewStringObj(interp, cmd, -1)); Jim_DeleteAssocData(interp, "context"); }if (retval == JIM_OK) { ... } int inner_retval = Jim_SetAssocData(interp, "context", NULL, old_context); if (retval == JIM_OK) retval = inner_retval; cmd_ctx->current_target_override = saved_target_override; current_gdb_connection = NULL; target_call_timer_callbacks_now(); gdb_connection->output_flag = GDB_OUTPUT_NO; free(cmd); if (retval == JIM_RETURN) retval = interp->returnCode; int lenmsg; const char *cretmsg = Jim_GetString(Jim_GetResult(interp), &lenmsg); char *retmsg; if (lenmsg && cretmsg[lenmsg - 1] != '\n') { retmsg = alloc_printf("%s\n", cretmsg); lenmsg++; }if (lenmsg && cretmsg[lenmsg - 1] != '\n') { ... } else { retmsg = strdup(cretmsg); }else { ... } if (!retmsg) return ERROR_GDB_BUFFER_TOO_SMALL; if (retval == JIM_OK) { if (lenmsg) { char *hex_buffer = malloc(lenmsg * 2 + 1); if (!hex_buffer) { free(retmsg); return ERROR_GDB_BUFFER_TOO_SMALL; }if (!hex_buffer) { ... } size_t pkt_len = hexify(hex_buffer, (const uint8_t *)retmsg, lenmsg, lenmsg * 2 + 1); gdb_put_packet(connection, hex_buffer, pkt_len); free(hex_buffer); }if (lenmsg) { ... } else { gdb_put_packet(connection, "OK", 2); }else { ... } }if (retval == JIM_OK) { ... } else { if (lenmsg) gdb_output_con(connection, retmsg); gdb_send_error(connection, retval); }else { ... } free(retmsg); return ERROR_OK; }if (packet_size > 6) { ... } gdb_put_packet(connection, "OK", 2); return ERROR_OK; }if (strncmp(packet, "qRcmd,", 6) == 0) { ... } else if (strncmp(packet, "qCRC:", 5) == 0) { if (packet_size > 5) { int retval; char gdb_reply[10]; char *separator; uint32_t checksum; target_addr_t addr = 0; uint32_t len = 0; /* skip command character */ packet += 5; addr = strtoull(packet, &separator, 16); if (*separator != ',') { LOG_ERROR("incomplete read memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*separator != ',') { ... } len = strtoul(separator + 1, NULL, 16); gdb_connection->output_flag = GDB_OUTPUT_NOTIF; retval = target_checksum_memory(target, addr, len, &checksum); gdb_connection->output_flag = GDB_OUTPUT_NO; if (retval == ERROR_OK) { snprintf(gdb_reply, 10, "C%8.8" PRIx32 "", checksum); gdb_put_packet(connection, gdb_reply, 9); }if (retval == ERROR_OK) { ... } else { retval = gdb_error(connection, retval); if (retval != ERROR_OK) return retval; }else { ... } return ERROR_OK; }if (packet_size > 5) { ... } }else if (strncmp(packet, "qCRC:", 5) == 0) { ... } else if (strncmp(packet, "qSupported", 10) == 0) { /* we currently support packet size and qXfer:memory-map:read (if enabled) * qXfer:features:read is supported for some targets *//* ... */ int retval = ERROR_OK; char *buffer = NULL; int pos = 0; int size = 0; bool gdb_target_desc_supported = false; /* we need to test that the target supports target descriptions */ retval = gdb_target_description_supported(target, &gdb_target_desc_supported); if (retval != ERROR_OK) { LOG_INFO("Failed detecting Target Description Support, disabling"); gdb_target_desc_supported = false; }if (retval != ERROR_OK) { ... } /* support may be disabled globally */ if (!gdb_use_target_description) { if (gdb_target_desc_supported) LOG_WARNING("Target Descriptions Supported, but disabled"); gdb_target_desc_supported = false; }if (!gdb_use_target_description) { ... } xml_printf(&retval, &buffer, &pos, &size, "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read%c;qXfer:threads:read+;QStartNoAckMode+;vContSupported+", GDB_BUFFER_SIZE, (gdb_use_memory_map && (flash_get_bank_count() > 0)) ? '+' : '-', gdb_target_desc_supported ? '+' : '-'); if (retval != ERROR_OK) { gdb_send_error(connection, 01); return ERROR_OK; }if (retval != ERROR_OK) { ... } gdb_put_packet(connection, buffer, strlen(buffer)); free(buffer); return ERROR_OK; }else if (strncmp(packet, "qSupported", 10) == 0) { ... } else if ((strncmp(packet, "qXfer:memory-map:read::", 23) == 0) && (flash_get_bank_count() > 0)) return gdb_memory_map(connection, packet, packet_size); else if (strncmp(packet, "qXfer:features:read:", 20) == 0) { char *xml = NULL; int retval = ERROR_OK; int offset; unsigned int length; /* skip command character */ packet += 20; if (decode_xfer_read(packet, NULL, &offset, &length) < 0) { gdb_send_error(connection, 01); return ERROR_OK; }if (decode_xfer_read(packet, NULL, &offset, &length) < 0) { ... } /* Target should prepare correct target description for annex. * The first character of returned xml is 'm' or 'l'. 'm' for * there are *more* chunks to transfer. 'l' for it is the *last* * chunk of target description. *//* ... */ retval = gdb_get_target_description_chunk(target, &gdb_connection->target_desc, &xml, offset, length); if (retval != ERROR_OK) { gdb_error(connection, retval); return retval; }if (retval != ERROR_OK) { ... } gdb_put_packet(connection, xml, strlen(xml)); free(xml); return ERROR_OK; }else if (strncmp(packet, "qXfer:features:read:", 20) == 0) { ... } else if (strncmp(packet, "qXfer:threads:read:", 19) == 0) { char *xml = NULL; int retval = ERROR_OK; int offset; unsigned int length; /* skip command character */ packet += 19; if (decode_xfer_read(packet, NULL, &offset, &length) < 0) { gdb_send_error(connection, 01); return ERROR_OK; }if (decode_xfer_read(packet, NULL, &offset, &length) < 0) { ... } /* Target should prepare correct thread list for annex. * The first character of returned xml is 'm' or 'l'. 'm' for * there are *more* chunks to transfer. 'l' for it is the *last* * chunk of target description. *//* ... */ retval = gdb_get_thread_list_chunk(target, &gdb_connection->thread_list, &xml, offset, length); if (retval != ERROR_OK) { gdb_error(connection, retval); return retval; }if (retval != ERROR_OK) { ... } gdb_put_packet(connection, xml, strlen(xml)); free(xml); return ERROR_OK; }else if (strncmp(packet, "qXfer:threads:read:", 19) == 0) { ... } else if (strncmp(packet, "QStartNoAckMode", 15) == 0) { gdb_connection->noack_mode = 1; gdb_put_packet(connection, "OK", 2); return ERROR_OK; }else if (strncmp(packet, "QStartNoAckMode", 15) == 0) { ... } else if (target->type->gdb_query_custom) { char *buffer = NULL; int ret = target->type->gdb_query_custom(target, packet, &buffer); gdb_put_packet(connection, buffer, strlen(buffer)); return ret; }else if (target->type->gdb_query_custom) { ... } gdb_put_packet(connection, "", 0); return ERROR_OK; }{ ... } static bool gdb_handle_vcont_packet(struct connection *connection, const char *packet, __attribute__((unused)) int packet_size) { struct gdb_connection *gdb_connection = connection->priv; struct target *target = get_target_from_connection(connection); const char *parse = packet; int retval; /* query for vCont supported */ if (parse[0] == '?') { if (target->type->step) { /* gdb doesn't accept c without C and s without S */ gdb_put_packet(connection, "vCont;c;C;s;S", 13); return true; }if (target->type->step) { ... } return false; }if (parse[0] == '?') { ... } if (parse[0] == ';') { ++parse; }if (parse[0] == ';') { ... } /* simple case, a continue packet */ if (parse[0] == 'c') { gdb_running_type = 'c'; LOG_TARGET_DEBUG(target, "target continue"); gdb_connection->output_flag = GDB_OUTPUT_ALL; retval = target_resume(target, 1, 0, 0, 0); if (retval == ERROR_TARGET_NOT_HALTED) LOG_TARGET_INFO(target, "target was not halted when resume was requested"); /* poll target in an attempt to make its internal state consistent */ if (retval != ERROR_OK) { retval = target_poll(target); if (retval != ERROR_OK) LOG_TARGET_DEBUG(target, "error polling target after failed resume"); }if (retval != ERROR_OK) { ... } /* * We don't report errors to gdb here, move frontend_state to * TARGET_RUNNING to stay in sync with gdb's expectation of the * target state *//* ... */ gdb_connection->frontend_state = TARGET_RUNNING; target_call_event_callbacks(target, TARGET_EVENT_GDB_START); return true; }if (parse[0] == 'c') { ... } /* single-step or step-over-breakpoint */ if (parse[0] == 's') { gdb_running_type = 's'; bool fake_step = false; struct target *ct = target; int current_pc = 1; int64_t thread_id; parse++; if (parse[0] == ':') { char *endp; parse++; thread_id = strtoll(parse, &endp, 16); if (endp) { parse = endp; }if (endp) { ... } }if (parse[0] == ':') { ... } else { thread_id = 0; }else { ... } if (target->rtos) { /* FIXME: why is this necessary? rtos state should be up-to-date here already! */ rtos_update_threads(target); target->rtos->gdb_target_for_threadid(connection, thread_id, &ct); /* * check if the thread to be stepped is the current rtos thread * if not, we must fake the step *//* ... */ if (target->rtos->current_thread != thread_id) fake_step = true; }if (target->rtos) { ... } if (parse[0] == ';') { ++parse; if (parse[0] == 'c') { parse += 1; /* check if thread-id follows */ if (parse[0] == ':') { int64_t tid; parse += 1; tid = strtoll(parse, NULL, 16); if (tid == thread_id) { /* * Special case: only step a single thread (core), * keep the other threads halted. Currently, only * aarch64 target understands it. Other target types don't * care (nobody checks the actual value of 'current') * and it doesn't really matter. This deserves * a symbolic constant and a formal interface documentation * at a later time. *//* ... */ LOG_DEBUG("request to step current core only"); /* uncomment after checking that indeed other targets are safe */ /*current_pc = 2;*/ }if (tid == thread_id) { ... } }if (parse[0] == ':') { ... } }if (parse[0] == 'c') { ... } }if (parse[0] == ';') { ... } LOG_TARGET_DEBUG(ct, "single-step thread %" PRIx64, thread_id); gdb_connection->output_flag = GDB_OUTPUT_ALL; target_call_event_callbacks(ct, TARGET_EVENT_GDB_START); /* * work around an annoying gdb behaviour: when the current thread * is changed in gdb, it assumes that the target can follow and also * make the thread current. This is an assumption that cannot hold * for a real target running a multi-threading OS. We just fake * the step to not trigger an internal error in gdb. See * https://sourceware.org/bugzilla/show_bug.cgi?id=22925 for details *//* ... */ if (fake_step) { int sig_reply_len; char sig_reply[128]; LOG_DEBUG("fake step thread %"PRIx64, thread_id); sig_reply_len = snprintf(sig_reply, sizeof(sig_reply), "T05thread:%016"PRIx64";", thread_id); gdb_put_packet(connection, sig_reply, sig_reply_len); gdb_connection->output_flag = GDB_OUTPUT_NO; return true; }if (fake_step) { ... } /* support for gdb_sync command */ if (gdb_connection->sync) { gdb_connection->sync = false; if (ct->state == TARGET_HALTED) { LOG_DEBUG("stepi ignored. GDB will now fetch the register state " "from the target."); gdb_sig_halted(connection); gdb_connection->output_flag = GDB_OUTPUT_NO; }if (ct->state == TARGET_HALTED) { ... } else gdb_connection->frontend_state = TARGET_RUNNING; return true; }if (gdb_connection->sync) { ... } retval = target_step(ct, current_pc, 0, 0); if (retval == ERROR_TARGET_NOT_HALTED) LOG_TARGET_INFO(ct, "target was not halted when step was requested"); /* if step was successful send a reply back to gdb */ if (retval == ERROR_OK) { retval = target_poll(ct); if (retval != ERROR_OK) LOG_TARGET_DEBUG(ct, "error polling target after successful step"); /* send back signal information */ gdb_signal_reply(ct, connection); /* stop forwarding log packets! */ gdb_connection->output_flag = GDB_OUTPUT_NO; }if (retval == ERROR_OK) { ... } else gdb_connection->frontend_state = TARGET_RUNNING; return true; }if (parse[0] == 's') { ... } LOG_ERROR("Unknown vCont packet"); return false; }{ ... } static char *next_hex_encoded_field(const char **str, char sep) { size_t hexlen; const char *hex = *str; if (hex[0] == '\0') return NULL; const char *end = strchr(hex, sep); if (!end) hexlen = strlen(hex); else hexlen = end - hex; *str = hex + hexlen + 1; if (hexlen % 2 != 0) { /* Malformed hex data */ return NULL; }if (hexlen % 2 != 0) { ... } size_t count = hexlen / 2; char *decoded = malloc(count + 1); if (!decoded) return NULL; size_t converted = unhexify((void *)decoded, hex, count); if (converted != count) { free(decoded); return NULL; }if (converted != count) { ... } decoded[count] = '\0'; return decoded; }{ ... } /* handle extended restart packet */ static void gdb_restart_inferior(struct connection *connection, const char *packet, int packet_size) { struct gdb_connection *gdb_con = connection->priv; struct target *target = get_target_from_connection(connection); breakpoint_clear_target(target); watchpoint_clear_target(target); command_run_linef(connection->cmd_ctx, "ocd_gdb_restart %s", target_name(target)); /* set connection as attached after reset */ gdb_con->attached = true; /* info rtos parts */ gdb_thread_packet(connection, packet, packet_size); }{ ... } static bool gdb_handle_vrun_packet(struct connection *connection, const char *packet, int packet_size) { struct target *target = get_target_from_connection(connection); const char *parse = packet; /* Skip "vRun" */ parse += 4; if (parse[0] != ';') return false; parse++; /* Skip first field "filename"; don't know what to do with it. */ free(next_hex_encoded_field(&parse, ';')); char *cmdline = next_hex_encoded_field(&parse, ';'); while (cmdline) { char *arg = next_hex_encoded_field(&parse, ';'); if (!arg) break; char *new_cmdline = alloc_printf("%s %s", cmdline, arg); free(cmdline); free(arg); cmdline = new_cmdline; }while (cmdline) { ... } if (cmdline) { if (target->semihosting) { LOG_INFO("GDB set inferior command line to '%s'", cmdline); free(target->semihosting->cmdline); target->semihosting->cmdline = cmdline; }if (target->semihosting) { ... } else { LOG_INFO("GDB set inferior command line to '%s' but semihosting is unavailable", cmdline); free(cmdline); }else { ... } }if (cmdline) { ... } gdb_restart_inferior(connection, packet, packet_size); gdb_put_packet(connection, "S00", 3); return true; }{ ... } static int gdb_v_packet(struct connection *connection, char const *packet, int packet_size) { struct gdb_connection *gdb_connection = connection->priv; int result; struct target *target = get_target_from_connection(connection); if (strncmp(packet, "vCont", 5) == 0) { bool handled; packet += 5; packet_size -= 5; handled = gdb_handle_vcont_packet(connection, packet, packet_size); if (!handled) gdb_put_packet(connection, "", 0); return ERROR_OK; }if (strncmp(packet, "vCont", 5) == 0) { ... } if (strncmp(packet, "vRun", 4) == 0) { bool handled; handled = gdb_handle_vrun_packet(connection, packet, packet_size); if (!handled) gdb_put_packet(connection, "", 0); return ERROR_OK; }if (strncmp(packet, "vRun", 4) == 0) { ... } /* if flash programming disabled - send a empty reply */ if (!gdb_flash_program) { gdb_put_packet(connection, "", 0); return ERROR_OK; }if (!gdb_flash_program) { ... } if (strncmp(packet, "vFlashErase:", 12) == 0) { target_addr_t addr; unsigned long length; char const *parse = packet + 12; if (*parse == '\0') { LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*parse == '\0') { ... } addr = strtoull(parse, (char **)&parse, 16); if (*(parse++) != ',' || *parse == '\0') { LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*(parse++) != ',' || *parse == '\0') { ... } length = strtoull(parse, (char **)&parse, 16); if (*parse != '\0') { LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*parse != '\0') { ... } /* 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(target, TARGET_EVENT_GDB_FLASH_ERASE_START); /* vFlashErase:addr,length messages require region start and * end to be "block" aligned ... if padding is ever needed, * GDB will have become dangerously confused. *//* ... */ if (get_target_from_connection(connection)->report_flash_progress) { LOG_INFO("Erasing FLASH: 0x%08x-0x%08x...", (uint32_t)addr, (uint32_t)(addr + length)); }if (get_target_from_connection(connection)->report_flash_progress) { ... } result = flash_erase_address_range(target, false, addr, length); /* perform any target specific operations after the erase */ target_call_event_callbacks(target, TARGET_EVENT_GDB_FLASH_ERASE_END); /* perform erase */ if (result != ERROR_OK) { /* GDB doesn't evaluate the actual error number returned, * treat a failed erase as an I/O error *//* ... */ gdb_send_error(connection, EIO); LOG_ERROR("flash_erase returned %i", result); }if (result != ERROR_OK) { ... } else gdb_put_packet(connection, "OK", 2); return ERROR_OK; }if (strncmp(packet, "vFlashErase:", 12) == 0) { ... } if (strncmp(packet, "vFlashWrite:", 12) == 0) { int retval; target_addr_t addr; unsigned long length; char const *parse = packet + 12; if (*parse == '\0') { LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*parse == '\0') { ... } addr = strtoull(parse, (char **)&parse, 16); if (*(parse++) != ':') { LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; }if (*(parse++) != ':') { ... } length = packet_size - (parse - packet); /* create a new image if there isn't already one */ if (!gdb_connection->vflash_image) { gdb_connection->vflash_image = malloc(sizeof(struct image)); image_open(gdb_connection->vflash_image, "", "build"); }if (!gdb_connection->vflash_image) { ... } /* create new section with content from packet buffer */ retval = image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (uint8_t const *)parse); if (retval != ERROR_OK) return retval; gdb_put_packet(connection, "OK", 2); return ERROR_OK; }if (strncmp(packet, "vFlashWrite:", 12) == 0) { ... } if (strncmp(packet, "vFlashDone", 10) == 0) { uint32_t written; /* GDB command 'flash-erase' does not send a vFlashWrite, * so nothing to write here. *//* ... */ if (!gdb_connection->vflash_image) { gdb_put_packet(connection, "OK", 2); return ERROR_OK; }if (!gdb_connection->vflash_image) { ... } /* process the flashing buffer. No need to erase as GDB * always issues a vFlashErase first. *//* ... */ target_call_event_callbacks(target, TARGET_EVENT_GDB_FLASH_WRITE_START); result = flash_write(target, gdb_connection->vflash_image, &written, false); target_call_event_callbacks(target, TARGET_EVENT_GDB_FLASH_WRITE_END); if (result != ERROR_OK) { if (result == ERROR_FLASH_DST_OUT_OF_BANK) gdb_put_packet(connection, "E.memtype", 9); else gdb_send_error(connection, EIO); }if (result != ERROR_OK) { ... } else { LOG_DEBUG("wrote %u bytes from vFlash image to flash", (unsigned)written); gdb_put_packet(connection, "OK", 2); }else { ... } image_close(gdb_connection->vflash_image); free(gdb_connection->vflash_image); gdb_connection->vflash_image = NULL; return ERROR_OK; }if (strncmp(packet, "vFlashDone", 10) == 0) { ... } gdb_put_packet(connection, "", 0); return ERROR_OK; }{ ... } static int gdb_detach(struct connection *connection) { /* * Only reply "OK" to GDB * it will close the connection and this will trigger a call to * gdb_connection_closed() that will in turn trigger the event * TARGET_EVENT_GDB_DETACH *//* ... */ return gdb_put_packet(connection, "OK", 2); }{ ... } /* The format of 'F' response packet is * Fretcode,errno,Ctrl-C flag;call-specific attachment *//* ... */ static int gdb_fileio_response_packet(struct connection *connection, char const *packet, int packet_size) { struct target *target = get_target_from_connection(connection); char *separator; char *parsing_point; int fileio_retcode = strtoul(packet + 1, &separator, 16); int fileio_errno = 0; bool fileio_ctrl_c = false; int retval; LOG_DEBUG("-"); if (*separator == ',') { parsing_point = separator + 1; fileio_errno = strtoul(parsing_point, &separator, 16); if (*separator == ',') { if (*(separator + 1) == 'C') { /* TODO: process ctrl-c */ fileio_ctrl_c = true; }if (*(separator + 1) == 'C') { ... } }if (*separator == ',') { ... } }if (*separator == ',') { ... } LOG_DEBUG("File-I/O response, retcode: 0x%x, errno: 0x%x, ctrl-c: %s", fileio_retcode, fileio_errno, fileio_ctrl_c ? "true" : "false"); retval = target_gdb_fileio_end(target, fileio_retcode, fileio_errno, fileio_ctrl_c); if (retval != ERROR_OK) return ERROR_FAIL; /* After File-I/O ends, keep continue or step */ if (gdb_running_type == 'c') retval = target_resume(target, 1, 0x0, 0, 0); else if (gdb_running_type == 's') retval = target_step(target, 1, 0x0, 0); else retval = ERROR_FAIL; if (retval != ERROR_OK) return ERROR_FAIL; return ERROR_OK; }{ ... } static void gdb_log_callback(void *priv, const char *file, unsigned line, const char *function, const char *string) { struct connection *connection = priv; struct gdb_connection *gdb_con = connection->priv; if (gdb_con->output_flag != GDB_OUTPUT_ALL) /* No out allowed */ return; if (gdb_con->busy) { /* do not reply this using the O packet */ return; }if (gdb_con->busy) { ... } gdb_output_con(connection, string); }{ ... } static void gdb_sig_halted(struct connection *connection) { char sig_reply[4]; snprintf(sig_reply, 4, "T%2.2x", 2); gdb_put_packet(connection, sig_reply, 3); }{ ... } static int gdb_input_inner(struct connection *connection) { /* Do not allocate this on the stack */ static char gdb_packet_buffer[GDB_BUFFER_SIZE + 1]; /* Extra byte for null-termination */ struct target *target; char const *packet = gdb_packet_buffer; int packet_size; int retval; struct gdb_connection *gdb_con = connection->priv; static bool warn_use_ext; target = get_target_from_connection(connection); /* 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; retval = gdb_get_packet(connection, gdb_packet_buffer, &packet_size); if (retval != ERROR_OK) return retval; /* terminate with zero */ gdb_packet_buffer[packet_size] = '\0'; if (packet_size > 0) { gdb_log_incoming_packet(connection, gdb_packet_buffer); retval = ERROR_OK; switch (packet[0]) { case 'T': /* Is thread alive? */ gdb_thread_packet(connection, packet, packet_size); break;case 'T': case 'H': /* Set current thread ( 'c' for step and continue, * 'g' for all other operations ) *//* ... */ gdb_thread_packet(connection, packet, packet_size); break;case 'H': case 'q': case 'Q': retval = gdb_thread_packet(connection, packet, packet_size); if (retval == GDB_THREAD_PACKET_NOT_CONSUMED) retval = gdb_query_packet(connection, packet, packet_size); break;case 'Q': case 'g': retval = gdb_get_registers_packet(connection, packet, packet_size); break;case 'g': case 'G': retval = gdb_set_registers_packet(connection, packet, packet_size); break;case 'G': case 'p': retval = gdb_get_register_packet(connection, packet, packet_size); break;case 'p': case 'P': retval = gdb_set_register_packet(connection, packet, packet_size); break;case 'P': case 'm': gdb_con->output_flag = GDB_OUTPUT_NOTIF; retval = gdb_read_memory_packet(connection, packet, packet_size); gdb_con->output_flag = GDB_OUTPUT_NO; break;case 'm': case 'M': gdb_con->output_flag = GDB_OUTPUT_NOTIF; retval = gdb_write_memory_packet(connection, packet, packet_size); gdb_con->output_flag = GDB_OUTPUT_NO; break;case 'M': case 'z': case 'Z': retval = gdb_breakpoint_watchpoint_packet(connection, packet, packet_size); break;case 'Z': case '?': gdb_last_signal_packet(connection, packet, packet_size); /* '?' is sent after the eventual '!' */ if (!warn_use_ext && !gdb_con->extended_protocol) { warn_use_ext = true; LOG_WARNING("Prefer GDB command \"target extended-remote :%s\" instead of \"target remote :%s\"", connection->service->port, connection->service->port); }if (!warn_use_ext && !gdb_con->extended_protocol) { ... } break;case '?': case 'c': case 's': { gdb_thread_packet(connection, packet, packet_size); gdb_con->output_flag = GDB_OUTPUT_ALL; 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; }if (gdb_con->mem_write_error) { ... } bool nostep = false; bool already_running = false; if (target->state == TARGET_RUNNING) { 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; }if (target->state == TARGET_RUNNING) { ... } else if (target->state != TARGET_HALTED) { LOG_WARNING("The target is not in the halted nor running stated, " "stepi/continue ignored."); nostep = true; }else if (target->state != TARGET_HALTED) { ... } else if ((packet[0] == 's') && gdb_con->sync) { /* Hmm..... when you issue a continue in GDB, then a "stepi" is * sent by GDB first to OpenOCD, thus defeating the check to * make only the single stepping have the sync feature... *//* ... */ nostep = true; LOG_DEBUG("stepi ignored. GDB will now fetch the register state " "from the target."); }else if ((packet[0] == 's') && gdb_con->sync) { ... } gdb_con->sync = false; 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. * * Or we want to allow GDB to pick up a fresh set of * register values without modifying the target state. * *//* ... */ gdb_sig_halted(connection); /* stop forwarding log packets! */ gdb_con->output_flag = GDB_OUTPUT_NO; }if (!already_running && nostep) { ... } else { /* We're running/stepping, in which case we can * forward log output until the target is halted *//* ... */ gdb_con->frontend_state = TARGET_RUNNING; target_call_event_callbacks(target, TARGET_EVENT_GDB_START); if (!already_running) { /* 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, packet, packet_size); if (retval != ERROR_OK) { /* we'll never receive a halted * condition... issue a false one.. *//* ... */ gdb_frontend_halted(target, connection); }if (retval != ERROR_OK) { ... } }if (!already_running) { ... } }else { ... } ...} break;case 's': case 'v': retval = gdb_v_packet(connection, packet, packet_size); break;case 'v': case 'D': retval = gdb_detach(connection); break;case 'D': case 'X': gdb_con->output_flag = GDB_OUTPUT_NOTIF; retval = gdb_write_memory_binary_packet(connection, packet, packet_size); gdb_con->output_flag = GDB_OUTPUT_NO; break;case 'X': case 'k': if (gdb_con->extended_protocol) { gdb_con->attached = false; break; }if (gdb_con->extended_protocol) { ... } gdb_put_packet(connection, "OK", 2); return ERROR_SERVER_REMOTE_CLOSED;case 'k': case '!': /* handle extended remote protocol */ gdb_con->extended_protocol = true; gdb_put_packet(connection, "OK", 2); break;case '!': case 'R': /* handle extended restart packet */ gdb_restart_inferior(connection, packet, packet_size); break; case 'R': case 'j': /* DEPRECATED */ /* packet supported only by smp target i.e cortex_a.c*/ /* handle smp packet replying coreid played to gbd */ gdb_read_smp_packet(connection, packet, packet_size); break; case 'j': case 'J': /* DEPRECATED */ /* packet supported only by smp target i.e cortex_a.c */ /* handle smp packet setting coreid to be played at next * resume to gdb *//* ... */ gdb_write_smp_packet(connection, packet, packet_size); break; case 'J': case 'F': /* File-I/O extension */ /* After gdb uses host-side syscall to complete target file * I/O, gdb sends host-side syscall return value to target * by 'F' packet. * The format of 'F' response packet is * Fretcode,errno,Ctrl-C flag;call-specific attachment *//* ... */ gdb_con->frontend_state = TARGET_RUNNING; gdb_con->output_flag = GDB_OUTPUT_ALL; gdb_fileio_response_packet(connection, packet, packet_size); break; case 'F': default: /* ignore unknown packets */ LOG_DEBUG("ignoring 0x%2.2x packet", packet[0]); gdb_put_packet(connection, "", 0); break;default }switch (packet[0]) { ... } /* if a packet handler returned an error, exit input loop */ if (retval != ERROR_OK) return retval; }if (packet_size > 0) { ... } if (gdb_con->ctrl_c) { if (target->state == TARGET_RUNNING) { struct target *t = target; if (target->rtos) target->rtos->gdb_target_for_threadid(connection, target->rtos->current_threadid, &t); retval = target_halt(t); if (retval == ERROR_OK) retval = target_poll(t); if (retval != ERROR_OK) target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT); gdb_con->ctrl_c = false; }if (target->state == TARGET_RUNNING) { ... } else { LOG_INFO("The target is not running when halt was requested, stopping GDB."); target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT); }else { ... } }if (gdb_con->ctrl_c) { ... } ...} while (gdb_con->buf_cnt > 0); return ERROR_OK; }{ ... } static int gdb_input(struct connection *connection) { int retval = gdb_input_inner(connection); struct gdb_connection *gdb_con = connection->priv; if (retval == ERROR_SERVER_REMOTE_CLOSED) return retval; /* logging does not propagate the error, yet can set the gdb_con->closed flag */ if (gdb_con->closed) return ERROR_SERVER_REMOTE_CLOSED; /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */ return ERROR_OK; }{ ... } /* * Send custom notification packet as keep-alive during memory read/write. * * From gdb 7.0 (released 2009-10-06) an unknown notification received during * memory read/write would be silently dropped. * Before gdb 7.0 any character, with exclusion of "+-$", would be considered * as junk and ignored. * In both cases the reception will reset the timeout counter in gdb, thus * working as a keep-alive. * Check putpkt_binary() and getpkt_sane() in gdb commit * 74531fed1f2d662debc2c209b8b3faddceb55960 * * Enable remote debug in gdb with 'set debug remote 1' to either dump the junk * characters in gdb pre-7.0 and the notification from gdb 7.0. *//* ... */ static void gdb_async_notif(struct connection *connection) { static unsigned char count; unsigned char checksum = 0; char buf[22]; int len = sprintf(buf, "%%oocd_keepalive:%2.2x", count++); for (int i = 1; i < len; i++) checksum += buf[i]; len += sprintf(buf + len, "#%2.2x", checksum); #ifdef _DEBUG_GDB_IO_ LOG_DEBUG("sending packet '%s'", buf); #endif gdb_write(connection, buf, len); }{ ... } static void gdb_keep_client_alive(struct connection *connection) { struct gdb_connection *gdb_con = connection->priv; switch (gdb_con->output_flag) { case GDB_OUTPUT_NO: /* no need for keep-alive */ break;case GDB_OUTPUT_NO: case GDB_OUTPUT_NOTIF: /* send asynchronous notification */ gdb_async_notif(connection); break;case GDB_OUTPUT_NOTIF: case GDB_OUTPUT_ALL: /* send an empty O packet */ gdb_output_con(connection, ""); break;case GDB_OUTPUT_ALL: default: break;default }switch (gdb_con->output_flag) { ... } }{ ... } static const struct service_driver gdb_service_driver = { .name = "gdb", .new_connection_during_keep_alive_handler = NULL, .new_connection_handler = gdb_new_connection, .input_handler = gdb_input, .connection_closed_handler = gdb_connection_closed, .keep_client_alive_handler = gdb_keep_client_alive, ...}; static int gdb_target_start(struct target *target, const char *port) { struct gdb_service *gdb_service; int ret; gdb_service = malloc(sizeof(struct gdb_service)); if (!gdb_service) return -ENOMEM; LOG_TARGET_INFO(target, "starting gdb server on %s", port); gdb_service->target = target; gdb_service->core[0] = -1; gdb_service->core[1] = -1; target->gdb_service = gdb_service; ret = add_service(&gdb_service_driver, port, target->gdb_max_connections, gdb_service); /* initialize all targets gdb service with the same pointer */ { struct target_list *head; foreach_smp_target(head, target->smp_targets) { struct target *curr = head->target; if (curr != target) curr->gdb_service = gdb_service; }foreach_smp_target (head, target->smp_targets) { ... } ...} return ret; }{ ... } static int gdb_target_add_one(struct target *target) { /* one gdb instance per smp list */ if ((target->smp) && (target->gdb_service)) return ERROR_OK; /* skip targets that cannot handle a gdb connections (e.g. mem_ap) */ if (!target_supports_gdb_connection(target)) { LOG_TARGET_DEBUG(target, "skip gdb server"); return ERROR_OK; }if (!target_supports_gdb_connection(target)) { ... } if (target->gdb_port_override) { if (strcmp(target->gdb_port_override, "disabled") == 0) { LOG_TARGET_INFO(target, "gdb port disabled"); return ERROR_OK; }if (strcmp(target->gdb_port_override, "disabled") == 0) { ... } return gdb_target_start(target, target->gdb_port_override); }if (target->gdb_port_override) { ... } if (strcmp(gdb_port_next, "disabled") == 0) { LOG_TARGET_INFO(target, "gdb port disabled"); return ERROR_OK; }if (strcmp(gdb_port_next, "disabled") == 0) { ... } int retval = gdb_target_start(target, gdb_port_next); if (retval == ERROR_OK) { /* save the port number so can be queried with * $target_name cget -gdb-port *//* ... */ target->gdb_port_override = strdup(gdb_port_next); long portnumber; /* If we can parse the port number * then we increment the port number for the next target. *//* ... */ char *end; portnumber = strtol(gdb_port_next, &end, 0); if (!*end) { if (parse_long(gdb_port_next, &portnumber) == ERROR_OK) { free(gdb_port_next); if (portnumber) { gdb_port_next = alloc_printf("%ld", portnumber+1); }if (portnumber) { ... } else { /* Don't increment if gdb_port is 0, since we're just * trying to allocate an unused port. *//* ... */ gdb_port_next = strdup("0"); }else { ... } }if (parse_long(gdb_port_next, &portnumber) == ERROR_OK) { ... } }if (!*end) { ... } else if (strcmp(gdb_port_next, "pipe") == 0) { gdb_port_next = "disabled"; }else if (strcmp(gdb_port_next, "pipe") == 0) { ... } }if (retval == ERROR_OK) { ... } return retval; }{ ... } int gdb_target_add_all(struct target *target) { if (!target) { LOG_WARNING("gdb services need one or more targets defined"); return ERROR_OK; }if (!target) { ... } while (target) { int retval = gdb_target_add_one(target); if (retval != ERROR_OK) return retval; target = target->next; }while (target) { ... } return ERROR_OK; }{ ... } COMMAND_HANDLER(handle_gdb_sync_command) { if (CMD_ARGC != 0) return ERROR_COMMAND_SYNTAX_ERROR; if (!current_gdb_connection) { command_print(CMD, "gdb sync command can only be run from within gdb using \"monitor gdb sync\""); return ERROR_FAIL; }if (!current_gdb_connection) { ... } current_gdb_connection->sync = true; return ERROR_OK; }{ ... } COMMAND_HANDLER(handle_gdb_port_command) { int retval = CALL_COMMAND_HANDLER(server_pipe_command, &gdb_port); if (retval == ERROR_OK) { free(gdb_port_next); gdb_port_next = strdup(gdb_port); }if (retval == ERROR_OK) { ... } return retval; }{ ... } COMMAND_HANDLER(handle_gdb_memory_map_command) { if (CMD_ARGC != 1) 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) 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) return ERROR_COMMAND_SYNTAX_ERROR; COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_report_data_abort); return ERROR_OK; }{ ... } COMMAND_HANDLER(handle_gdb_report_register_access_error) { if (CMD_ARGC != 1) return ERROR_COMMAND_SYNTAX_ERROR; COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_report_register_access_error); return ERROR_OK; }{ ... } COMMAND_HANDLER(handle_gdb_breakpoint_override_command) { if (CMD_ARGC == 0) { /* nothing */ }if (CMD_ARGC == 0) { ... } else if (CMD_ARGC == 1) { gdb_breakpoint_override = 1; if (strcmp(CMD_ARGV[0], "hard") == 0) gdb_breakpoint_override_type = BKPT_HARD; else if (strcmp(CMD_ARGV[0], "soft") == 0) gdb_breakpoint_override_type = BKPT_SOFT; else if (strcmp(CMD_ARGV[0], "disable") == 0) gdb_breakpoint_override = 0; }else if (CMD_ARGC == 1) { ... } else return ERROR_COMMAND_SYNTAX_ERROR; if (gdb_breakpoint_override) LOG_USER("force %s breakpoints", (gdb_breakpoint_override_type == BKPT_HARD) ? "hard" : "soft"); else LOG_USER("breakpoint type is not overridden"); return ERROR_OK; }{ ... } COMMAND_HANDLER(handle_gdb_target_description_command) { if (CMD_ARGC != 1) return ERROR_COMMAND_SYNTAX_ERROR; COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_use_target_description); return ERROR_OK; }{ ... } COMMAND_HANDLER(handle_gdb_save_tdesc_command) { char *tdesc; uint32_t tdesc_length; struct target *target = get_current_target(CMD_CTX); int retval = gdb_generate_target_description(target, &tdesc); if (retval != ERROR_OK) { LOG_ERROR("Unable to Generate Target Description"); return ERROR_FAIL; }if (retval != ERROR_OK) { ... } tdesc_length = strlen(tdesc); struct fileio *fileio; size_t size_written; char *tdesc_filename = alloc_printf("%s.xml", target_type_name(target)); if (!tdesc_filename) { retval = ERROR_FAIL; goto out; }if (!tdesc_filename) { ... } retval = fileio_open(&fileio, tdesc_filename, FILEIO_WRITE, FILEIO_TEXT); if (retval != ERROR_OK) { LOG_ERROR("Can't open %s for writing", tdesc_filename); goto out; }if (retval != ERROR_OK) { ... } retval = fileio_write(fileio, tdesc_length, tdesc, &size_written); fileio_close(fileio); if (retval != ERROR_OK) LOG_ERROR("Error while writing the tdesc file"); out: free(tdesc_filename); free(tdesc); return retval; }{ ... } static const struct command_registration gdb_subcommand_handlers[] = { { .name = "sync", .handler = handle_gdb_sync_command, .mode = COMMAND_ANY, .help = "next stepi will return immediately allowing " "GDB to fetch register state without affecting " "target state", .usage = "" ...}, { .name = "port", .handler = handle_gdb_port_command, .mode = COMMAND_CONFIG, .help = "Normally gdb listens to a TCP/IP port. Each subsequent GDB " "server listens for the next port number after the " "base port number specified. " "No arguments reports GDB port. \"pipe\" means listen to stdin " "output to stdout, an integer is base port number, \"disabled\" disables " "port. Any other string is are interpreted as named pipe to listen to. " "Output pipe is the same name as input pipe, but with 'o' appended.", .usage = "[port_num]", ...}, { .name = "memory_map", .handler = handle_gdb_memory_map_command, .mode = COMMAND_CONFIG, .help = "enable or disable memory map", .usage = "('enable'|'disable')" ...}, { .name = "flash_program", .handler = handle_gdb_flash_program_command, .mode = COMMAND_CONFIG, .help = "enable or disable flash program", .usage = "('enable'|'disable')" ...}, { .name = "report_data_abort", .handler = handle_gdb_report_data_abort_command, .mode = COMMAND_CONFIG, .help = "enable or disable reporting data aborts", .usage = "('enable'|'disable')" ...}, { .name = "report_register_access_error", .handler = handle_gdb_report_register_access_error, .mode = COMMAND_CONFIG, .help = "enable or disable reporting register access errors", .usage = "('enable'|'disable')" ...}, { .name = "breakpoint_override", .handler = handle_gdb_breakpoint_override_command, .mode = COMMAND_ANY, .help = "Display or specify type of breakpoint " "to be used by gdb 'break' commands.", .usage = "('hard'|'soft'|'disable')" ...}, { .name = "target_description", .handler = handle_gdb_target_description_command, .mode = COMMAND_CONFIG, .help = "enable or disable target description", .usage = "('enable'|'disable')" ...}, { .name = "save_tdesc", .handler = handle_gdb_save_tdesc_command, .mode = COMMAND_EXEC, .help = "Save the target description file", .usage = "", ...}, COMMAND_REGISTRATION_DONE ...}; static const struct command_registration gdb_command_handlers[] = { { .name = "gdb", .mode = COMMAND_ANY, .help = "GDB commands", .chain = gdb_subcommand_handlers, .usage = "", ...}, COMMAND_REGISTRATION_DONE ...}; 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); }{ ... } void gdb_service_free(void) { free(gdb_port); free(gdb_port_next); }{ ... } int gdb_get_actual_connections(void) { return gdb_actual_connections; }{ ... }
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