X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Fserver%2Fgdb_server.c;h=0b28287d80a7c8ee22f69a7f18d72ad3e69f0162;hp=ea92d3ba377f0184f074e7ef8e6b049642d49f1f;hb=537b06a810778995d7f79d9120f4063f33dee635;hpb=1c42606aea99e870f0ffd435390e29a160d019ee diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c index ea92d3ba37..0b28287d80 100644 --- a/src/server/gdb_server.c +++ b/src/server/gdb_server.c @@ -2,12 +2,24 @@ * Copyright (C) 2005 by Dominic Rath * * Dominic.Rath@gmx.de * * * - * Copyright (C) 2007-2009 Øyvind Harboe * + * Copyright (C) 2007-2010 Øyvind Harboe * * oyvind.harboe@zylin.com * * * * Copyright (C) 2008 by Spencer Oliver * * 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 * + * * + * Copyright (C) 2013 Franck Jullien * + * elec4fun@gmail.com * + * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * @@ -21,8 +33,9 @@ * You should have received a copy of the GNU General Public License * * along with this program; if not, write to the * * Free Software Foundation, Inc., * - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * ***************************************************************************/ + #ifdef HAVE_CONFIG_H #include "config.h" #endif @@ -35,11 +48,25 @@ #include "gdb_server.h" #include #include +#include "rtos/rtos.h" +#include "target/smp.h" + +/** + * @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. + */ +struct target_desc_format { + char *tdesc; + uint32_t tdesc_length; +}; /* private connection data for GDB */ -struct gdb_connection -{ +struct gdb_connection { char buffer[GDB_BUFFER_SIZE]; char *buf_p; int buf_cnt; @@ -49,13 +76,24 @@ struct gdb_connection int closed; int busy; int noack_mode; - bool sync; /* set flag to true if you want the next stepi to return immediately. - allowing GDB to pick up a fresh set of register values from the target - without modifying the target state. */ - + /* 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; + /* temporarily used for target description support */ + struct target_desc_format target_desc; }; - #if 0 #define _DEBUG_GDB_IO_ #endif @@ -65,10 +103,9 @@ static struct gdb_connection *current_gdb_connection; static int gdb_breakpoint_override; static enum breakpoint_type gdb_breakpoint_override_type; -extern int gdb_error(struct connection *connection, int retval); -static unsigned short gdb_port = 3333; -static unsigned short gdb_port_next = 0; -static const char *DIGITS = "0123456789abcdef"; +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); @@ -80,35 +117,46 @@ int gdb_actual_connections; /* set if we are sending a memory map to gdb * via qXfer:memory-map:read packet */ /* enabled by default*/ -int gdb_use_memory_map = 1; +static int gdb_use_memory_map = 1; /* enabled by default*/ -int gdb_flash_program = 1; +static int gdb_flash_program = 1; /* if set, data aborts cause an error to be reported in memory read packets - * see the code in gdb_read_memory_packet() for further explanations */ -int gdb_report_data_abort = 0; + * see the code in gdb_read_memory_packet() for further explanations. + * Disabled by default. + */ +static int gdb_report_data_abort; + +/* set if we are sending target descriptions to gdb + * via qXfer:features:read packet */ +/* enabled by default */ +static int gdb_use_target_description = 1; -int gdb_last_signal(struct target *target) +/* current processing free-run type, used by file-I/O */ +static char gdb_running_type; + +static int gdb_last_signal(struct target *target) { - switch (target->debug_reason) - { + switch (target->debug_reason) { case DBG_REASON_DBGRQ: - return 0x2; /* SIGINT */ + return 0x2; /* SIGINT */ case DBG_REASON_BREAKPOINT: case DBG_REASON_WATCHPOINT: case DBG_REASON_WPTANDBKPT: - return 0x05; /* SIGTRAP */ + return 0x05; /* SIGTRAP */ case DBG_REASON_SINGLESTEP: - return 0x05; /* SIGTRAP */ + return 0x05; /* SIGTRAP */ case DBG_REASON_NOTHALTED: - return 0x0; /* no signal... shouldn't happen */ + return 0x0; /* no signal... shouldn't happen */ default: - LOG_USER("undefined debug reason %d - target needs reset", target->debug_reason); + LOG_USER("undefined debug reason %d - target needs reset", + target->debug_reason); return 0x0; } } -int check_pending(struct connection *connection, int timeout_s, int *got_data) +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 @@ -118,11 +166,10 @@ int check_pending(struct connection *connection, int timeout_s, int *got_data) struct gdb_connection *gdb_con = connection->priv; int t; if (got_data == NULL) - got_data=&t; + got_data = &t; *got_data = 0; - if (gdb_con->buf_cnt > 0) - { + if (gdb_con->buf_cnt > 0) { *got_data = 1; return ERROR_OK; } @@ -132,24 +179,20 @@ int check_pending(struct connection *connection, int timeout_s, int *got_data) tv.tv_sec = timeout_s; tv.tv_usec = 0; - if (socket_select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 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 - { + else return ERROR_OK; - } } *got_data = FD_ISSET(connection->fd, &read_fds) != 0; return ERROR_OK; } -int gdb_get_char(struct connection *connection, int* next_char) +static int gdb_get_char_inner(struct connection *connection, int *next_char) { struct gdb_connection *gdb_con = connection->priv; int retval = ERROR_OK; @@ -157,42 +200,21 @@ int gdb_get_char(struct connection *connection, int* next_char) #ifdef _DEBUG_GDB_IO_ char *debug_buffer; #endif - - if (gdb_con->buf_cnt-- > 0) - { - *next_char = *(gdb_con->buf_p++); - if (gdb_con->buf_cnt > 0) - connection->input_pending = 1; - else - connection->input_pending = 0; - -#ifdef _DEBUG_GDB_IO_ - LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); -#endif - - return ERROR_OK; - } - - for (;;) - { - if (connection->service->type == CONNECTION_PIPE) - { + for (;; ) { + if (connection->service->type != CONNECTION_TCP) gdb_con->buf_cnt = read(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE); - } - else - { + 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); + gdb_con->buf_cnt = read_socket(connection->fd, + gdb_con->buffer, + GDB_BUFFER_SIZE); } if (gdb_con->buf_cnt > 0) - { break; - } - if (gdb_con->buf_cnt == 0) - { + if (gdb_con->buf_cnt == 0) { gdb_con->closed = 1; return ERROR_SERVER_REMOTE_CLOSED; } @@ -200,8 +222,7 @@ int gdb_get_char(struct connection *connection, int* next_char) #ifdef _WIN32 errno = WSAGetLastError(); - switch (errno) - { + switch (errno) { case WSAEWOULDBLOCK: usleep(1000); break; @@ -216,8 +237,7 @@ int gdb_get_char(struct connection *connection, int* next_char) exit(-1); } #else - switch (errno) - { + switch (errno) { case EAGAIN: usleep(1000); break; @@ -236,9 +256,7 @@ int gdb_get_char(struct connection *connection, int* next_char) } #ifdef _DEBUG_GDB_IO_ - debug_buffer = malloc(gdb_con->buf_cnt + 1); - memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt); - debug_buffer[gdb_con->buf_cnt] = 0; + debug_buffer = strndup(gdb_con->buffer, gdb_con->buf_cnt); LOG_DEBUG("received '%s'", debug_buffer); free(debug_buffer); #endif @@ -257,19 +275,57 @@ int gdb_get_char(struct connection *connection, int* next_char) return retval; } -int gdb_putback_char(struct connection *connection, int last_char) +/** + * 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 = 1; + else + connection->input_pending = 0; + +#ifdef _DEBUG_GDB_IO_ + LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); +#endif + + return ERROR_OK; + } + 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; - if (gdb_con->buf_p > gdb_con->buffer) - { + 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++; - } - else - { + } else LOG_ERROR("BUG: couldn't put character back"); - } return ERROR_OK; } @@ -277,32 +333,20 @@ int gdb_putback_char(struct connection *connection, int last_char) /* The only way we can detect that the socket is closed is the first time * we write to it, we will fail. Subsequent write operations will * succeed. Shudder! */ -int gdb_write(struct connection *connection, void *data, int len) +static int gdb_write(struct connection *connection, void *data, int len) { struct gdb_connection *gdb_con = connection->priv; if (gdb_con->closed) return ERROR_SERVER_REMOTE_CLOSED; - if (connection->service->type == CONNECTION_PIPE) - { - /* write to stdout */ - if (write(STDOUT_FILENO, data, len) == len) - { - return ERROR_OK; - } - } - else - { - if (write_socket(connection->fd, data, len) == len) - { - return ERROR_OK; - } - } + if (connection_write(connection, data, len) == len) + return ERROR_OK; gdb_con->closed = 1; return ERROR_SERVER_REMOTE_CLOSED; } -int gdb_put_packet_inner(struct connection *connection, char *buffer, int len) +static int gdb_put_packet_inner(struct connection *connection, + char *buffer, int len) { int i; unsigned char my_checksum = 0; @@ -323,13 +367,14 @@ int gdb_put_packet_inner(struct connection *connection, char *buffer, int len) * an ACK (+) for everything we've sent off. */ int gotdata; - for (;;) - { - if ((retval = check_pending(connection, 0, &gotdata)) != ERROR_OK) + for (;; ) { + retval = check_pending(connection, 0, &gotdata); + if (retval != ERROR_OK) return retval; if (!gotdata) break; - if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK) + retval = gdb_get_char(connection, &reply); + if (retval != ERROR_OK) return retval; if (reply == '$') { /* fix a problem with some IAR tools */ @@ -342,97 +387,77 @@ int gdb_put_packet_inner(struct connection *connection, char *buffer, int len) } #endif - while (1) - { + while (1) { #ifdef _DEBUG_GDB_IO_ - debug_buffer = malloc(len + 1); - memcpy(debug_buffer, buffer, len); - debug_buffer[len] = 0; + debug_buffer = strndup(buffer, len); LOG_DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum); free(debug_buffer); #endif char local_buffer[1024]; local_buffer[0] = '$'; - if ((size_t)len + 4 <= sizeof(local_buffer)) - { + 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++); - local_buffer[len++] = '#'; - local_buffer[len++] = DIGITS[(my_checksum >> 4) & 0xf]; - local_buffer[len++] = DIGITS[my_checksum & 0xf]; - if ((retval = gdb_write(connection, local_buffer, len)) != ERROR_OK) - { + 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; - } - } - else - { + } else { /* larger packets are transmitted directly from caller supplied buffer - by several calls to gdb_write() to avoid dynamic allocation */ - local_buffer[1] = '#'; - local_buffer[2] = DIGITS[(my_checksum >> 4) & 0xf]; - local_buffer[3] = DIGITS[my_checksum & 0xf]; - if ((retval = gdb_write(connection, local_buffer, 1)) != ERROR_OK) - { + * 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; - } - if ((retval = gdb_write(connection, buffer, len)) != ERROR_OK) - { + retval = gdb_write(connection, buffer, len); + if (retval != ERROR_OK) return retval; - } - if ((retval = gdb_write(connection, local_buffer + 1, 3)) != ERROR_OK) - { + retval = gdb_write(connection, local_buffer + 1, 3); + if (retval != ERROR_OK) return retval; - } } if (gdb_con->noack_mode) break; - if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK) + retval = gdb_get_char(connection, &reply); + if (retval != ERROR_OK) return retval; if (reply == '+') break; - else if (reply == '-') - { + else if (reply == '-') { /* Stop sending output packets for now */ log_remove_callback(gdb_log_callback, connection); LOG_WARNING("negative reply, retrying"); - } - else if (reply == 0x3) - { + } else if (reply == 0x3) { gdb_con->ctrl_c = 1; - if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK) + retval = gdb_get_char(connection, &reply); + if (retval != ERROR_OK) return retval; if (reply == '+') break; - else if (reply == '-') - { + else if (reply == '-') { /* Stop sending output packets for now */ log_remove_callback(gdb_log_callback, connection); LOG_WARNING("negative reply, retrying"); - } - else if (reply == '$') { + } else if (reply == '$') { LOG_ERROR("GDB missing ack(1) - assumed good"); gdb_putback_char(connection, reply); return ERROR_OK; } else { - LOG_ERROR("unknown character(1) 0x%2.2x in reply, dropping connection", reply); gdb_con->closed = 1; return ERROR_SERVER_REMOTE_CLOSED; } - } - else if (reply == '$') { + } else if (reply == '$') { LOG_ERROR("GDB missing ack(2) - assumed good"); gdb_putback_char(connection, reply); return ERROR_OK; - } - else - { - LOG_ERROR("unknown character(2) 0x%2.2x in reply, dropping connection", reply); + } else { + LOG_ERROR("unknown character(2) 0x%2.2x in reply, dropping connection", + reply); gdb_con->closed = 1; return ERROR_SERVER_REMOTE_CLOSED; } @@ -456,49 +481,50 @@ int gdb_put_packet(struct connection *connection, char *buffer, int len) return retval; } -static __inline__ int fetch_packet(struct connection *connection, int *checksum_ok, int noack, int *len, char *buffer) +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; + int retval = ERROR_OK; struct gdb_connection *gdb_con = connection->priv; my_checksum = 0; int count = 0; count = 0; - for (;;) - { + + /* 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 ((gdb_con->buf_cnt > 2) && ((gdb_con->buf_cnt + count) < *len)) - { + 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 = gdb_con->buf_p; - int run = gdb_con->buf_cnt - 2; + char *buf = buf_p; + int run = buf_cnt - 2; i = 0; int done = 0; - while (i < run) - { + while (i < run) { character = *buf++; i++; - if (character == '#') - { + if (character == '#') { /* Danger! character can be '#' when esc is - * used so we need an explicit boolean for done here. - */ + * 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; @@ -506,90 +532,106 @@ static __inline__ int fetch_packet(struct connection *connection, int *checksum_ i++; my_checksum += character & 0xff; buffer[count++] = (character ^ 0x20) & 0xff; - } - else - { + } else { my_checksum += character & 0xff; buffer[count++] = character & 0xff; } } - gdb_con->buf_p += i; - gdb_con->buf_cnt -= i; + buf_p += i; + buf_cnt -= i; if (done) break; } - if (count > *len) - { + if (count > *len) { LOG_ERROR("packet buffer too small"); - return ERROR_GDB_BUFFER_TOO_SMALL; + retval = ERROR_GDB_BUFFER_TOO_SMALL; + break; } - if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) - return retval; + retval = gdb_get_char_fast(connection, &character, &buf_p, &buf_cnt); + if (retval != ERROR_OK) + break; if (character == '#') break; - if (character == '}') - { + if (character == '}') { /* data transmitted in binary mode (X packet) * uses 0x7d as escape character */ my_checksum += character & 0xff; - if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) - return retval; + + 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; - } - else - { + } else { my_checksum += character & 0xff; buffer[count++] = character & 0xff; } } + gdb_con->buf_p = buf_p; + gdb_con->buf_cnt = buf_cnt; + + if (retval != ERROR_OK) + return retval; + *len = count; - if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) + retval = gdb_get_char(connection, &character); + if (retval != ERROR_OK) return retval; checksum[0] = character; - if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) + 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; } -int gdb_get_packet_inner(struct connection *connection, char *buffer, int *len) +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 - { - if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) + 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) - { + switch (character) { case '$': break; case '+': - /* gdb sends a dummy ack '+' at every remote connect - see remote_start_remote (remote.c) - * in case anyone tries to debug why they receive this warning every time */ - LOG_WARNING("acknowledgment received, but no packet pending"); + /* 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"); + } else { + LOG_DEBUG("Received first acknowledgment after entering noack mode. Ignoring it."); + gdb_con->noack_mode = 2; + } break; case '-': LOG_WARNING("negative acknowledgment, but no packet pending"); @@ -604,33 +646,27 @@ int gdb_get_packet_inner(struct connection *connection, char *buffer, int *len) } } 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) - { - if ((retval = fetch_packet(connection, &checksum_ok, 1, len, buffer)) != ERROR_OK) + * calculating checksum */ + if (gdb_con->noack_mode) { + retval = fetch_packet(connection, &checksum_ok, 1, len, buffer); + if (retval != ERROR_OK) return retval; - } else - { - if ((retval = fetch_packet(connection, &checksum_ok, 0, len, buffer)) != ERROR_OK) + } else { + retval = fetch_packet(connection, &checksum_ok, 0, len, buffer); + if (retval != ERROR_OK) return retval; } - if (gdb_con->noack_mode) - { + if (gdb_con->noack_mode) { /* checksum is not checked in noack mode */ break; } - if (checksum_ok) - { - if ((retval = gdb_write(connection, "+", 1)) != ERROR_OK) - { + if (checksum_ok) { + retval = gdb_write(connection, "+", 1); + if (retval != ERROR_OK) return retval; - } break; } } @@ -640,7 +676,7 @@ int gdb_get_packet_inner(struct connection *connection, char *buffer, int *len) return ERROR_OK; } -int gdb_get_packet(struct connection *connection, char *buffer, int *len) +static int gdb_get_packet(struct connection *connection, char *buffer, int *len) { struct gdb_connection *gdb_con = connection->priv; gdb_con->busy = 1; @@ -649,35 +685,171 @@ int gdb_get_packet(struct connection *connection, char *buffer, int *len) return retval; } -int gdb_output_con(struct connection *connection, const char* line) +static int gdb_output_con(struct connection *connection, const char *line) { char *hex_buffer; - int i, bin_size; + int bin_size; bin_size = strlen(line); - hex_buffer = malloc(bin_size*2 + 2); + hex_buffer = malloc(bin_size * 2 + 2); if (hex_buffer == NULL) return ERROR_GDB_BUFFER_TOO_SMALL; hex_buffer[0] = 'O'; - for (i = 0; i < bin_size; i++) - snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]); - hex_buffer[bin_size*2 + 1] = 0; - - int retval = gdb_put_packet(connection, hex_buffer, bin_size*2 + 1); + int pkt_len = hexify(hex_buffer + 1, line, bin_size, bin_size * 2 + 1); + int retval = gdb_put_packet(connection, hex_buffer, pkt_len + 1); free(hex_buffer); return retval; } -int gdb_output(struct command_context *context, const char* line) +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[20]; + char stop_reason[20]; + int sig_reply_len; + int signal_var; + + if (target->debug_reason == DBG_REASON_EXIT) { + sig_reply_len = snprintf(sig_reply, sizeof(sig_reply), "W00"); + } else { + if (gdb_connection->ctrl_c) { + signal_var = 0x2; + gdb_connection->ctrl_c = 0; + } else + signal_var = gdb_last_signal(target); + + stop_reason[0] = '\0'; + if (target->debug_reason == DBG_REASON_WATCHPOINT) { + enum watchpoint_rw hit_wp_type; + uint32_t hit_wp_address; + + if (watchpoint_hit(target, &hit_wp_type, &hit_wp_address) == ERROR_OK) { + + switch (hit_wp_type) { + case WPT_WRITE: + snprintf(stop_reason, sizeof(stop_reason), + "watch:%08" PRIx32 ";", hit_wp_address); + break; + case WPT_READ: + snprintf(stop_reason, sizeof(stop_reason), + "rwatch:%08" PRIx32 ";", hit_wp_address); + break; + case WPT_ACCESS: + snprintf(stop_reason, sizeof(stop_reason), + "awatch:%08" PRIx32 ";", hit_wp_address); + break; + default: + break; + } + } + } + + sig_reply_len = snprintf(sig_reply, sizeof(sig_reply), "T%2.2x%s", + signal_var, stop_reason); + } + + gdb_put_packet(connection, sig_reply, sig_reply_len); + gdb_connection->frontend_state = TARGET_HALTED; + rtos_update_threads(target); +} + +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,%" PRIx32 "/%" PRIx32 ",%" PRIx32 ",%" PRIx32, target->fileio_info->identifier, + target->fileio_info->param_1, + target->fileio_info->param_2, + target->fileio_info->param_3, + target->fileio_info->param_4); + else if (strcmp(target->fileio_info->identifier, "close") == 0) + sprintf(fileio_command, "F%s,%" PRIx32, target->fileio_info->identifier, + target->fileio_info->param_1); + else if (strcmp(target->fileio_info->identifier, "read") == 0) + sprintf(fileio_command, "F%s,%" PRIx32 ",%" PRIx32 ",%" PRIx32, 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,%" PRIx32 ",%" PRIx32 ",%" PRIx32, 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,%" PRIx32 ",%" PRIx32 ",%" PRIx32, 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,%" PRIx32 "/%" PRIx32 ",%" PRIx32 "/%" PRIx32, target->fileio_info->identifier, + target->fileio_info->param_1, + target->fileio_info->param_2, + target->fileio_info->param_3, + target->fileio_info->param_4); + else if (strcmp(target->fileio_info->identifier, "unlink") == 0) + sprintf(fileio_command, "F%s,%" PRIx32 "/%" PRIx32, target->fileio_info->identifier, + target->fileio_info->param_1, + target->fileio_info->param_2); + else if (strcmp(target->fileio_info->identifier, "stat") == 0) + sprintf(fileio_command, "F%s,%" PRIx32 "/%" PRIx32 ",%" PRIx32, 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,%" PRIx32 ",%" PRIx32, 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,%" PRIx32 ",%" PRIx32, 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,%" PRIx32, target->fileio_info->identifier, + target->fileio_info->param_1); + else if (strcmp(target->fileio_info->identifier, "system") == 0) + sprintf(fileio_command, "F%s,%" PRIx32 "/%" PRIx32, target->fileio_info->identifier, + target->fileio_info->param_1, + target->fileio_info->param_2); + 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" PRIx32, target->fileio_info->param_1); + } 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; + } + + 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); + } else { + gdb_connection->frontend_state = TARGET_HALTED; + rtos_update_threads(target); + } +} static void gdb_frontend_halted(struct target *target, struct connection *connection) { @@ -692,38 +864,29 @@ static void gdb_frontend_halted(struct target *target, struct connection *connec * 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) - { - char sig_reply[4]; - int signal; - + if (gdb_connection->frontend_state == TARGET_RUNNING) { /* stop forwarding log packets! */ log_remove_callback(gdb_log_callback, connection); - if (gdb_connection->ctrl_c) - { - signal = 0x2; - gdb_connection->ctrl_c = 0; - } + /* check fileio first */ + if (target_get_gdb_fileio_info(target, target->fileio_info) == ERROR_OK) + gdb_fileio_reply(target, connection); else - { - signal = gdb_last_signal(target); - } - - snprintf(sig_reply, 4, "T%2.2x", signal); - gdb_put_packet(connection, sig_reply, 3); - gdb_connection->frontend_state = TARGET_HALTED; + gdb_signal_reply(target, connection); } } -int gdb_target_callback_event_handler(struct target *target, enum target_event event, void *priv) +static int gdb_target_callback_event_handler(struct target *target, + enum target_event event, void *priv) { int retval; struct connection *connection = priv; + struct gdb_service *gdb_service = connection->service->priv; - target_handle_event(target, event); - switch (event) - { + if (gdb_service->target != target) + return ERROR_OK; + + switch (event) { case TARGET_EVENT_GDB_HALT: gdb_frontend_halted(target, connection); break; @@ -731,11 +894,9 @@ int gdb_target_callback_event_handler(struct target *target, enum target_event e target_call_event_callbacks(target, TARGET_EVENT_GDB_END); break; case TARGET_EVENT_GDB_FLASH_ERASE_START: - target_handle_event(target, TARGET_EVENT_OLD_gdb_program_config); - if ((retval = jtag_execute_queue()) != ERROR_OK) - { + retval = jtag_execute_queue(); + if (retval != ERROR_OK) return retval; - } break; default: break; @@ -744,7 +905,7 @@ int gdb_target_callback_event_handler(struct target *target, enum target_event e return ERROR_OK; } -int gdb_new_connection(struct connection *connection) +static int gdb_new_connection(struct connection *connection) { struct gdb_connection *gdb_connection = malloc(sizeof(struct gdb_connection)); struct gdb_service *gdb_service = connection->service->priv; @@ -762,7 +923,11 @@ int gdb_new_connection(struct connection *connection) gdb_connection->closed = 0; gdb_connection->busy = 0; gdb_connection->noack_mode = 0; - gdb_connection->sync = true; + gdb_connection->sync = false; + gdb_connection->mem_write_error = false; + gdb_connection->attached = true; + gdb_connection->target_desc.tdesc = NULL; + gdb_connection->target_desc.tdesc_length = 0; /* send ACK to GDB for debug request */ gdb_write(connection, "+", 1); @@ -777,11 +942,13 @@ int gdb_new_connection(struct connection *connection) breakpoint_clear_target(gdb_service->target); watchpoint_clear_target(gdb_service->target); - /* register callback to be informed about target events */ - target_register_event_callback(gdb_target_callback_event_handler, connection); + /* clean previous rtos session if supported*/ + if ((gdb_service->target->rtos) && (gdb_service->target->rtos->type->clean)) + gdb_service->target->rtos->type->clean(gdb_service->target); /* remove the initial ACK from the incoming buffer */ - if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK) + retval = gdb_get_char(connection, &initial_ack); + if (retval != ERROR_OK) return retval; /* FIX!!!??? would we actually ever receive a + here??? @@ -791,16 +958,44 @@ int gdb_new_connection(struct connection *connection) gdb_putback_char(connection, initial_ack); target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_ATTACH); + if (gdb_use_memory_map) { + /* Connect must fail if the memory map can't be set up correctly. + * + * This will cause an auto_probe to be invoked, which is either + * a no-op or it will fail when the target isn't ready(e.g. not halted). + */ + int i; + for (i = 0; i < flash_get_bank_count(); i++) { + struct flash_bank *p; + p = get_flash_bank_by_num_noprobe(i); + if (p->target != gdb_service->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; + } + } + } + gdb_actual_connections++; LOG_DEBUG("New GDB Connection: %d, Target %s, state: %s", - gdb_actual_connections, - target_name(gdb_service->target), - target_state_name(gdb_service->target)); + gdb_actual_connections, + target_name(gdb_service->target), + target_state_name(gdb_service->target)); + + /* 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); return ERROR_OK; } -int gdb_connection_closed(struct connection *connection) +static int gdb_connection_closed(struct connection *connection) { struct gdb_service *gdb_service = connection->service->priv; struct gdb_connection *gdb_connection = connection->priv; @@ -812,13 +1007,12 @@ int gdb_connection_closed(struct connection *connection) gdb_actual_connections--; LOG_DEBUG("GDB Close, Target: %s, state: %s, gdb_actual_connections=%d", - target_name(gdb_service->target), - target_state_name(gdb_service->target), - gdb_actual_connections); + target_name(gdb_service->target), + target_state_name(gdb_service->target), + gdb_actual_connections); /* see if an image built with vFlash commands is left */ - if (gdb_connection->vflash_image) - { + if (gdb_connection->vflash_image) { image_close(gdb_connection->vflash_image); free(gdb_connection->vflash_image); gdb_connection->vflash_image = NULL; @@ -827,16 +1021,11 @@ int gdb_connection_closed(struct connection *connection) /* if this connection registered a debug-message receiver delete it */ delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target); - if (connection->priv) - { + if (connection->priv) { free(connection->priv); connection->priv = NULL; - } - else - { + } else LOG_ERROR("BUG: connection->priv == NULL"); - } - target_unregister_event_callback(gdb_target_callback_event_handler, connection); @@ -847,27 +1036,37 @@ int gdb_connection_closed(struct connection *connection) return ERROR_OK; } -void gdb_send_error(struct connection *connection, uint8_t the_error) +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); } -int gdb_last_signal_packet(struct connection *connection, struct target *target, char* packet, int packet_size) +static int gdb_last_signal_packet(struct connection *connection, + char *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; + 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; + } - signal = gdb_last_signal(target); + signal_var = gdb_last_signal(target); - snprintf(sig_reply, 4, "S%2.2x", signal); + snprintf(sig_reply, 4, "S%2.2x", signal_var); gdb_put_packet(connection, sig_reply, 3); return ERROR_OK; } -static int gdb_reg_pos(struct target *target, int pos, int len) +static inline int gdb_reg_pos(struct target *target, int pos, int len) { if (target->endianness == TARGET_LITTLE_ENDIAN) return pos; @@ -884,7 +1083,8 @@ static int gdb_reg_pos(struct target *target, int pos, int len) * The format of reg->value is little endian * */ -void gdb_str_to_target(struct target *target, char *tstr, struct reg *reg) +static void gdb_str_to_target(struct target *target, + char *tstr, struct reg *reg) { int i; @@ -893,51 +1093,38 @@ void gdb_str_to_target(struct target *target, char *tstr, struct reg *reg) buf = reg->value; buf_len = DIV_ROUND_UP(reg->size, 8); - for (i = 0; i < buf_len; i++) - { + for (i = 0; i < buf_len; i++) { int j = gdb_reg_pos(target, i, buf_len); - tstr[i*2] = DIGITS[(buf[j]>>4) & 0xf]; - tstr[i*2 + 1] = DIGITS[buf[j]&0xf]; - } -} - -static int hextoint(char c) -{ - if (c>='0'&&c<='9') - { - return c-'0'; - } - c = toupper(c); - if (c>='A'&&c<='F') - { - return c-'A'+10; + tstr += sprintf(tstr, "%02x", buf[j]); } - LOG_ERROR("BUG: invalid register value %08x", c); - return 0; } /* copy over in register buffer */ -void gdb_target_to_reg(struct target *target, char *tstr, int str_len, uint8_t *bin) +static void gdb_target_to_reg(struct target *target, + char *tstr, int str_len, uint8_t *bin) { - if (str_len % 2) - { + if (str_len % 2) { LOG_ERROR("BUG: gdb value with uneven number of characters encountered"); exit(-1); } int i; - for (i = 0; i < str_len; i += 2) - { - uint8_t t = hextoint(tstr[i]) << 4; - t |= hextoint(tstr[i + 1]); + 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); + } int j = gdb_reg_pos(target, i/2, str_len/2); bin[j] = t; } } -int gdb_get_registers_packet(struct connection *connection, struct target *target, char* packet, int packet_size) +static int gdb_get_registers_packet(struct connection *connection, + char *packet, int packet_size) { + struct target *target = get_target_from_connection(connection); struct reg **reg_list; int reg_list_size; int retval; @@ -950,35 +1137,39 @@ int gdb_get_registers_packet(struct connection *connection, struct target *targe LOG_DEBUG("-"); #endif - if ((retval = target_get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { + if ((target->rtos != NULL) && (ERROR_OK == rtos_get_gdb_reg_list(connection))) + return ERROR_OK; + + retval = target_get_gdb_reg_list(target, ®_list, ®_list_size, + REG_CLASS_GENERAL); + if (retval != ERROR_OK) return gdb_error(connection, retval); - } for (i = 0; i < reg_list_size; i++) - { - reg_packet_size += reg_list[i]->size; - } + reg_packet_size += DIV_ROUND_UP(reg_list[i]->size, 8) * 2; + + assert(reg_packet_size > 0); - reg_packet = malloc(DIV_ROUND_UP(reg_packet_size, 8) * 2); + reg_packet = malloc(reg_packet_size + 1); /* plus one for string termination null */ reg_packet_p = reg_packet; - for (i = 0; i < reg_list_size; i++) - { + for (i = 0; i < reg_list_size; i++) { + if (!reg_list[i]->valid) + reg_list[i]->type->get(reg_list[i]); gdb_str_to_target(target, reg_packet_p, reg_list[i]); reg_packet_p += DIV_ROUND_UP(reg_list[i]->size, 8) * 2; } #ifdef _DEBUG_GDB_IO_ { - char *reg_packet_p; - reg_packet_p = strndup(reg_packet, DIV_ROUND_UP(reg_packet_size, 8) * 2); - LOG_DEBUG("reg_packet: %s", reg_packet_p); - free(reg_packet_p); + 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, DIV_ROUND_UP(reg_packet_size, 8) * 2); + gdb_put_packet(connection, reg_packet, reg_packet_size); free(reg_packet); free(reg_list); @@ -986,8 +1177,10 @@ int gdb_get_registers_packet(struct connection *connection, struct target *targe return ERROR_OK; } -int gdb_set_registers_packet(struct connection *connection, struct target *target, char *packet, int packet_size) +static int gdb_set_registers_packet(struct connection *connection, + char *packet, int packet_size) { + struct target *target = get_target_from_connection(connection); int i; struct reg **reg_list; int reg_list_size; @@ -1002,27 +1195,23 @@ int gdb_set_registers_packet(struct connection *connection, struct target *targe packet++; packet_size--; - if (packet_size % 2) - { + if (packet_size % 2) { LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } - if ((retval = target_get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { + retval = target_get_gdb_reg_list(target, ®_list, ®_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++) - { + for (i = 0; i < reg_list_size; i++) { uint8_t *bin_buf; 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); @@ -1032,7 +1221,6 @@ int gdb_set_registers_packet(struct connection *connection, struct target *targe /* advance packet pointer */ packet_p += chars; - free(bin_buf); } @@ -1044,8 +1232,10 @@ int gdb_set_registers_packet(struct connection *connection, struct target *targe return ERROR_OK; } -int gdb_get_register_packet(struct connection *connection, struct target *target, char *packet, int packet_size) +static int gdb_get_register_packet(struct connection *connection, + char *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; @@ -1056,18 +1246,20 @@ int gdb_get_register_packet(struct connection *connection, struct target *target LOG_DEBUG("-"); #endif - if ((retval = target_get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { + retval = target_get_gdb_reg_list(target, ®_list, ®_list_size, + REG_CLASS_ALL); + if (retval != ERROR_OK) return gdb_error(connection, retval); - } - if (reg_list_size <= reg_num) - { + if (reg_list_size <= reg_num) { LOG_ERROR("gdb requested a non-existing register"); - exit(-1); + return ERROR_SERVER_REMOTE_CLOSED; } - reg_packet = malloc(DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2); + if (!reg_list[reg_num]->valid) + reg_list[reg_num]->type->get(reg_list[reg_num]); + + reg_packet = malloc(DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2 + 1); /* plus one for string termination null */ gdb_str_to_target(target, reg_packet, reg_list[reg_num]); @@ -1079,8 +1271,10 @@ int gdb_get_register_packet(struct connection *connection, struct target *target return ERROR_OK; } -int gdb_set_register_packet(struct connection *connection, struct target *target, char *packet, int packet_size) +static int gdb_set_register_packet(struct connection *connection, + char *packet, int packet_size) { + struct target *target = get_target_from_connection(connection); char *separator; uint8_t *bin_buf; int reg_num = strtoul(packet + 1, &separator, 16); @@ -1090,19 +1284,17 @@ int gdb_set_register_packet(struct connection *connection, struct target *target LOG_DEBUG("-"); - if ((retval = target_get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { + retval = target_get_gdb_reg_list(target, ®_list, ®_list_size, + REG_CLASS_ALL); + if (retval != ERROR_OK) return gdb_error(connection, retval); - } - if (reg_list_size < reg_num) - { + if (reg_list_size <= reg_num) { LOG_ERROR("gdb requested a non-existing register"); return ERROR_SERVER_REMOTE_CLOSED; } - if (*separator != '=') - { + if (*separator != '=') { LOG_ERROR("GDB 'set register packet', but no '=' following the register number"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -1111,7 +1303,11 @@ int gdb_set_register_packet(struct connection *connection, struct target *target bin_buf = malloc(DIV_ROUND_UP(reg_list[reg_num]->size, 8)); int chars = (DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2); - /* fix!!! add some sanity checks on packet size here */ + if ((unsigned int)chars != strlen(separator + 1)) { + LOG_ERROR("gdb sent a packet with wrong register size"); + free(bin_buf); + return ERROR_SERVER_REMOTE_CLOSED; + } gdb_target_to_reg(target, separator + 1, chars, bin_buf); @@ -1125,29 +1321,14 @@ int gdb_set_register_packet(struct connection *connection, struct target *target return ERROR_OK; } -int gdb_error(struct connection *connection, int retval) +/* No attempt is made to translate the "retval" to + * GDB speak. This has to be done at the calling + * site as no mapping really exists. + */ +static int gdb_error(struct connection *connection, int retval) { - switch (retval) - { - case ERROR_TARGET_DATA_ABORT: - gdb_send_error(connection, EIO); - break; - case ERROR_TARGET_TRANSLATION_FAULT: - gdb_send_error(connection, EFAULT); - break; - case ERROR_TARGET_UNALIGNED_ACCESS: - gdb_send_error(connection, EFAULT); - break; - case ERROR_TARGET_NOT_HALTED: - gdb_send_error(connection, EFAULT); - break; - default: - /* This could be that the target reset itself. */ - LOG_ERROR("unexpected error %i", retval); - gdb_send_error(connection, EFAULT); - break; - } - + LOG_DEBUG("Reporting %i to GDB as generic error", retval); + gdb_send_error(connection, EFAULT); return ERROR_OK; } @@ -1156,8 +1337,10 @@ int gdb_error(struct connection *connection, int retval) * * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192????? */ -int gdb_read_memory_packet(struct connection *connection, struct target *target, char *packet, int packet_size) +static int gdb_read_memory_packet(struct connection *connection, + char *packet, int packet_size) { + struct target *target = get_target_from_connection(connection); char *separator; uint32_t addr = 0; uint32_t len = 0; @@ -1172,22 +1355,26 @@ int gdb_read_memory_packet(struct connection *connection, struct target *target, addr = strtoul(packet, &separator, 16); - if (*separator != ',') - { + if (*separator != ',') { LOG_ERROR("incomplete read memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } len = strtoul(separator + 1, NULL, 16); + if (!len) { + LOG_WARNING("invalid read memory packet received (len == 0)"); + gdb_put_packet(connection, NULL, 0); + return ERROR_OK; + } + buffer = malloc(len); LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len); retval = target_read_buffer(target, addr, len, buffer); - if ((retval != ERROR_OK)&&!gdb_report_data_abort) - { + 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. * @@ -1195,7 +1382,8 @@ int gdb_read_memory_packet(struct connection *connection, struct target *target, * 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 + * 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. @@ -1204,41 +1392,31 @@ int gdb_read_memory_packet(struct connection *connection, struct target *target, retval = ERROR_OK; } - if (retval == ERROR_OK) - { + if (retval == ERROR_OK) { hex_buffer = malloc(len * 2 + 1); - uint32_t i; - for (i = 0; i < len; i++) - { - uint8_t t = buffer[i]; - hex_buffer[2 * i] = DIGITS[(t >> 4) & 0xf]; - hex_buffer[2 * i + 1] = DIGITS[t & 0xf]; - } + int pkt_len = hexify(hex_buffer, (char *)buffer, len, len * 2 + 1); - gdb_put_packet(connection, hex_buffer, len * 2); + gdb_put_packet(connection, hex_buffer, pkt_len); free(hex_buffer); - } - else - { + } else retval = gdb_error(connection, retval); - } free(buffer); return retval; } -int gdb_write_memory_packet(struct connection *connection, struct target *target, char *packet, int packet_size) +static int gdb_write_memory_packet(struct connection *connection, + char *packet, int packet_size) { + struct target *target = get_target_from_connection(connection); char *separator; uint32_t addr = 0; uint32_t len = 0; uint8_t *buffer; - - uint32_t i; int retval; /* skip command character */ @@ -1246,16 +1424,14 @@ int gdb_write_memory_packet(struct connection *connection, struct target *target addr = strtoul(packet, &separator, 16); - if (*separator != ',') - { + if (*separator != ',') { LOG_ERROR("incomplete write memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } len = strtoul(separator + 1, &separator, 16); - if (*(separator++) != ':') - { + if (*(separator++) != ':') { LOG_ERROR("incomplete write memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -1264,79 +1440,82 @@ int gdb_write_memory_packet(struct connection *connection, struct target *target LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len); - for (i = 0; i < len; i++) - { - uint32_t tmp; - sscanf(separator + 2*i, "%2" SCNx32 , &tmp); - buffer[i] = tmp; - } + if (unhexify((char *)buffer, separator, len) != (int)len) + LOG_ERROR("unable to decode memory packet"); 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; } -int gdb_write_memory_binary_packet(struct connection *connection, struct target *target, char *packet, int packet_size) +static int gdb_write_memory_binary_packet(struct connection *connection, + char *packet, int packet_size) { + struct target *target = get_target_from_connection(connection); char *separator; uint32_t addr = 0; uint32_t len = 0; - int retval; + int retval = ERROR_OK; /* skip command character */ packet++; addr = strtoul(packet, &separator, 16); - if (*separator != ',') - { + if (*separator != ',') { LOG_ERROR("incomplete write memory binary packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } len = strtoul(separator + 1, &separator, 16); - if (*(separator++) != ':') - { + if (*(separator++) != ':') { LOG_ERROR("incomplete write memory binary packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } - retval = ERROR_OK; - if (len) - { - LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len); + struct gdb_connection *gdb_connection = connection->priv; - retval = target_write_buffer(target, addr, len, (uint8_t*)separator); + if (gdb_connection->mem_write_error) { + retval = ERROR_FAIL; + /* now that we have reported the memory write error, we can clear the condition */ + gdb_connection->mem_write_error = false; } + /* By replying the packet *immediately* GDB will send us a new packet + * while we write the last one to the target. + */ if (retval == ERROR_OK) - { gdb_put_packet(connection, "OK", 2); - } - else - { - if ((retval = gdb_error(connection, retval)) != ERROR_OK) + else { + retval = gdb_error(connection, retval); + if (retval != ERROR_OK) return retval; } + if (len) { + LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len); + + retval = target_write_buffer(target, addr, len, (uint8_t *)separator); + if (retval != ERROR_OK) + gdb_connection->mem_write_error = true; + } + return ERROR_OK; } -int gdb_step_continue_packet(struct connection *connection, struct target *target, char *packet, int packet_size) +static int gdb_step_continue_packet(struct connection *connection, + char *packet, int packet_size) { + struct target *target = get_target_from_connection(connection); int current = 0; uint32_t address = 0x0; int retval = ERROR_OK; @@ -1344,23 +1523,16 @@ int gdb_step_continue_packet(struct connection *connection, struct target *targe LOG_DEBUG("-"); if (packet_size > 1) - { - packet[packet_size] = 0; address = strtoul(packet + 1, NULL, 16); - } else - { current = 1; - } - if (packet[0] == 'c') - { + gdb_running_type = packet[0]; + if (packet[0] == 'c') { LOG_DEBUG("continue"); - target_handle_event(target, TARGET_EVENT_OLD_pre_resume); - retval = target_resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */ - } - else if (packet[0] == 's') - { + /* resume at current address, don't handle breakpoints, not debugging */ + retval = target_resume(target, current, address, 0, 0); + } else if (packet[0] == 's') { LOG_DEBUG("step"); /* step at current or address, don't handle breakpoints */ retval = target_step(target, current, address, 0); @@ -1368,11 +1540,13 @@ int gdb_step_continue_packet(struct connection *connection, struct target *targe return retval; } -int gdb_breakpoint_watchpoint_packet(struct connection *connection, struct target *target, char *packet, int packet_size) +static int gdb_breakpoint_watchpoint_packet(struct connection *connection, + char *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; + enum watchpoint_rw wp_type = WPT_READ /* dummy init to avoid warning */; uint32_t address; uint32_t size; char *separator; @@ -1384,54 +1558,48 @@ int gdb_breakpoint_watchpoint_packet(struct connection *connection, struct targe if (type == 0) /* memory breakpoint */ bp_type = BKPT_SOFT; - else if (type == 1) /* hardware breakpoint */ + else if (type == 1) /* hardware breakpoint */ bp_type = BKPT_HARD; - else if (type == 2) /* write watchpoint */ + else if (type == 2) /* write watchpoint */ wp_type = WPT_WRITE; - else if (type == 3) /* read watchpoint */ + else if (type == 3) /* read watchpoint */ wp_type = WPT_READ; - else if (type == 4) /* access watchpoint */ + 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; + } - if (gdb_breakpoint_override && ((bp_type == BKPT_SOFT)||(bp_type == BKPT_HARD))) - { + if (gdb_breakpoint_override && ((bp_type == BKPT_SOFT) || (bp_type == BKPT_HARD))) bp_type = gdb_breakpoint_override_type; - } - if (*separator != ',') - { + if (*separator != ',') { LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } address = strtoul(separator + 1, &separator, 16); - if (*separator != ',') - { + if (*separator != ',') { LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } size = strtoul(separator + 1, &separator, 16); - switch (type) - { + switch (type) { case 0: case 1: - if (packet[0] == 'Z') - { - if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK) - { - if ((retval = gdb_error(connection, retval)) != ERROR_OK) + if (packet[0] == 'Z') { + retval = breakpoint_add(target, address, size, bp_type); + if (retval != ERROR_OK) { + retval = gdb_error(connection, retval); + if (retval != ERROR_OK) return retval; - } - else - { + } else gdb_put_packet(connection, "OK", 2); - } - } - else - { + } else { breakpoint_remove(target, address); gdb_put_packet(connection, "OK", 2); } @@ -1440,20 +1608,15 @@ int gdb_breakpoint_watchpoint_packet(struct connection *connection, struct targe case 3: case 4: { - if (packet[0] == 'Z') - { - if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK) - { - if ((retval = gdb_error(connection, retval)) != ERROR_OK) + if (packet[0] == 'Z') { + retval = watchpoint_add(target, address, size, wp_type, 0, 0xffffffffu); + if (retval != ERROR_OK) { + retval = gdb_error(connection, retval); + if (retval != ERROR_OK) return retval; - } - else - { + } else gdb_put_packet(connection, "OK", 2); - } - } - else - { + } else { watchpoint_remove(target, address); gdb_put_packet(connection, "OK", 2); } @@ -1466,27 +1629,25 @@ int gdb_breakpoint_watchpoint_packet(struct connection *connection, struct targe return ERROR_OK; } -/* print out a string and allocate more space as needed, mainly used for XML at this point */ -void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, ...) +/* print out a string and allocate more space as needed, + * mainly used for XML at this point + */ +static void xml_printf(int *retval, char **xml, int *pos, int *size, + const char *fmt, ...) { if (*retval != ERROR_OK) - { return; - } int first = 1; - for (;;) - { - if ((*xml == NULL) || (!first)) - { + for (;; ) { + if ((*xml == NULL) || (!first)) { /* start by 0 to exercise all the code paths. * Need minimum 2 bytes to fit 1 char and 0 terminator. */ *size = *size * 2 + 2; char *t = *xml; *xml = realloc(*xml, *size); - if (*xml == NULL) - { + if (*xml == NULL) { if (t) free(t); *retval = ERROR_SERVER_REMOTE_CLOSED; @@ -1499,8 +1660,7 @@ void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, . va_start(ap, fmt); ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap); va_end(ap); - if ((ret > 0) && ((ret + 1) < *size - *pos)) - { + if ((ret > 0) && ((ret + 1) < *size - *pos)) { *pos += ret; return; } @@ -1509,84 +1669,614 @@ void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, . } } -static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len) +static int decode_xfer_read(char *_buf, char **annex, int *ofs, unsigned int *len) { + int ret = 0; + char *buf = strdup(_buf); + char *_annex; char *separator; /* Extract and NUL-terminate the annex. */ - *annex = buf; + _annex = buf; while (*buf && *buf != ':') buf++; - if (*buf == '\0') - return -1; + if (*buf == '\0') { + ret = -1; + goto out; + } *buf++ = 0; + /* Return annex as copy because "buf" will be freed in this function */ + *annex = strdup(_annex); + /* After the read marker and annex, qXfer looks like a * traditional 'm' packet. */ *ofs = strtoul(buf, &separator, 16); - if (*separator != ',') - return -1; + if (*separator != ',') { + ret = -1; + goto out; + } *len = strtoul(separator + 1, NULL, 16); - return 0; +out: + free(buf); + return ret; +} + +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; } -int gdb_calc_blocksize(struct flash_bank *bank) +static int gdb_memory_map(struct connection *connection, + char *packet, int packet_size) { - uint32_t i; - uint32_t block_size = 0xffffffff; + /* 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. + */ - /* loop through all sectors and return smallest sector size */ + 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; + uint32_t ram_start = 0; + int i; + int target_flash_banks = 0; - for (i = 0; i < (uint32_t)bank->num_sectors; i++) - { - if (bank->sectors[i].size < block_size) - block_size = bank->sectors[i].size; + /* skip command character */ + packet += 23; + + offset = strtoul(packet, &separator, 16); + length = strtoul(separator + 1, &separator, 16); + + xml_printf(&retval, &xml, &pos, &size, "\n"); + + /* Sort banks in ascending order. We need to report non-flash + * memory as ram (or rather read/write) by default for GDB, since + * it has no concept of non-cacheable read/write memory (i/o etc). + * + * FIXME Most non-flash addresses are *NOT* RAM! Don't lie. + * Current versions of GDB assume unlisted addresses are RAM... + */ + banks = malloc(sizeof(struct flash_bank *)*flash_get_bank_count()); + + for (i = 0; i < flash_get_bank_count(); i++) { + 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; + } + banks[target_flash_banks++] = p; + } + + qsort(banks, target_flash_banks, sizeof(struct flash_bank *), + compare_bank); + + for (i = 0; i < target_flash_banks; i++) { + int j; + unsigned sector_size = 0; + uint32_t start; + + p = banks[i]; + start = p->base; + + if (ram_start < p->base) + xml_printf(&retval, &xml, &pos, &size, + "\n", + ram_start, p->base - ram_start); + + /* Report adjacent groups of same-size sectors. So for + * example top boot CFI flash will list an initial region + * with several large sectors (maybe 128KB) and several + * smaller ones at the end (maybe 32KB). STR7 will have + * regions with 8KB, 32KB, and 64KB sectors; etc. + */ + for (j = 0; j < p->num_sectors; j++) { + unsigned group_len; + + /* Maybe start a new group of sectors. */ + if (sector_size == 0) { + start = p->base + p->sectors[j].offset; + xml_printf(&retval, &xml, &pos, &size, + "sectors[j].size; + } + + /* Does this finish a group of sectors? + * If not, continue an already-started group. + */ + if (j == p->num_sectors - 1) + group_len = (p->base + p->size) - start; + else if (p->sectors[j + 1].size != sector_size) + group_len = p->base + p->sectors[j + 1].offset + - start; + else + continue; + + xml_printf(&retval, &xml, &pos, &size, + "length=\"0x%x\">\n" + "" + "0x%x\n" + "\n", + group_len, + sector_size); + sector_size = 0; + } + + ram_start = p->base + p->size; } - return block_size; + if (ram_start != 0) + xml_printf(&retval, &xml, &pos, &size, + "\n", + ram_start, 0-ram_start); + /* ELSE a flash chip could be at the very end of the 32 bit address + * space, in which case ram_start will be precisely 0 + */ + + free(banks); + banks = NULL; + + xml_printf(&retval, &xml, &pos, &size, "\n"); + + if (retval != ERROR_OK) { + gdb_error(connection, retval); + return retval; + } + + if (offset + length > pos) + length = pos - offset; + + char *t = malloc(length + 1); + t[0] = 'l'; + memcpy(t + 1, xml + offset, length); + gdb_put_packet(connection, t, length + 1); + + free(t); + free(xml); + return ERROR_OK; } -static int compare_bank (const void * a, const void * b) +static const char *gdb_get_reg_type_name(enum reg_type type) { - struct flash_bank *b1, *b2; - b1=*((struct flash_bank **)a); - b2=*((struct flash_bank **)b); + switch (type) { + case REG_TYPE_INT: + return "int"; + case REG_TYPE_INT8: + return "int8"; + case REG_TYPE_INT16: + return "int16"; + case REG_TYPE_INT32: + return "int32"; + case REG_TYPE_INT64: + return "int64"; + case REG_TYPE_INT128: + return "int128"; + case REG_TYPE_UINT8: + return "uint8"; + case REG_TYPE_UINT16: + return "uint16"; + case REG_TYPE_UINT32: + return "uint32"; + case REG_TYPE_UINT64: + return "uint64"; + case REG_TYPE_UINT128: + return "uint128"; + case REG_TYPE_CODE_PTR: + return "code_ptr"; + case REG_TYPE_DATA_PTR: + return "data_ptr"; + case REG_TYPE_FLOAT: + return "float"; + case REG_TYPE_IEEE_SINGLE: + return "ieee_single"; + case REG_TYPE_IEEE_DOUBLE: + return "ieee_double"; + case REG_TYPE_ARCH_DEFINED: + return "int"; /* return arbitrary string to avoid compile warning. */ + } + + return "int"; /* "int" as default value */ +} - if (b1->base == b2->base) - { - return 0; - } else if (b1->base > b2->base) - { - return 1; - } else - { - return -1; +static int gdb_generate_reg_type_description(struct target *target, + char **tdesc, int *pos, int *size, struct reg_data_type *type) +{ + int retval = ERROR_OK; + + if (type->type_class == REG_TYPE_CLASS_VECTOR) { + /* */ + xml_printf(&retval, tdesc, pos, size, + "\n", + type->id, type->reg_type_vector->type->id, + type->reg_type_vector->count); + + } else if (type->type_class == REG_TYPE_CLASS_UNION) { + /* + * ... + * */ + xml_printf(&retval, tdesc, pos, size, + "\n", + type->id); + + struct reg_data_type_union_field *field; + field = type->reg_type_union->fields; + while (field != NULL) { + xml_printf(&retval, tdesc, pos, size, + "\n", + field->name, field->type->id); + + field = field->next; + } + + xml_printf(&retval, tdesc, pos, size, + "\n"); + + } 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) { + /* + * ... + * */ + xml_printf(&retval, tdesc, pos, size, + "\n", + type->id, type->reg_type_struct->size); + while (field != NULL) { + xml_printf(&retval, tdesc, pos, size, + "\n", + field->name, field->bitfield->start, + field->bitfield->end); + + field = field->next; + } + } else { + /* + * ... + * */ + xml_printf(&retval, tdesc, pos, size, + "\n", + type->id); + while (field != NULL) { + xml_printf(&retval, tdesc, pos, size, + "\n", + field->name, field->type->id); + + field = field->next; + } + } + + xml_printf(&retval, tdesc, pos, size, + "\n"); + + } else if (type->type_class == REG_TYPE_CLASS_FLAGS) { + /* + * ... + * */ + xml_printf(&retval, tdesc, pos, size, + "\n", + type->id, type->reg_type_flags->size); + + struct reg_data_type_flags_field *field; + field = type->reg_type_flags->fields; + while (field != NULL) { + xml_printf(&retval, tdesc, pos, size, + "\n", + field->name, field->bitfield->start, field->bitfield->end); + + field = field->next; + } + + xml_printf(&retval, tdesc, pos, size, + "\n"); + + } + + 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 **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) + continue; + + if (reg_list[i]->feature != NULL + && reg_list[i]->feature->name != NULL + && (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++] = strdup(reg_list[i]->feature->name); + *feature_list = realloc(*feature_list, sizeof(char *) * (tbl_sz + 1)); + (*feature_list)[tbl_sz] = NULL; + break; + } else { + if (!strcmp((*feature_list)[j], reg_list[i]->feature->name)) + break; + } + } + } + } + + if (feature_list_size) + *feature_list_size = tbl_sz; + + return ERROR_OK; +} + +static int gdb_generate_target_description(struct target *target, char **tdesc_out) +{ + int retval = ERROR_OK; + struct reg **reg_list; + int reg_list_size; + char *tdesc = NULL; + int pos = 0; + int size = 0; + + retval = target_get_gdb_reg_list(target, ®_list, + ®_list_size, REG_CLASS_ALL); + + if (retval != ERROR_OK) { + LOG_ERROR("get register list failed"); + return ERROR_FAIL; + } + + if (reg_list_size <= 0) { + free(reg_list); + return ERROR_FAIL; + } + + char **features = NULL; + /* Get a list of available target registers features */ + retval = get_reg_features_list(target, &features, NULL, reg_list, reg_list_size); + if (retval != ERROR_OK) { + LOG_ERROR("Can't get the registers feature list"); + free(reg_list); + return ERROR_FAIL; + } + + /* If we found some features associated with registers, create sections */ + int current_feature = 0; + + xml_printf(&retval, &tdesc, &pos, &size, + "\n" + "\n" + "\n"); + + /* generate target description according to register list */ + if (features != NULL) { + while (features[current_feature]) { + + xml_printf(&retval, &tdesc, &pos, &size, + "\n", + features[current_feature]); + + int i; + for (i = 0; i < reg_list_size; i++) { + + if (reg_list[i]->exist == false) + continue; + + if (strcmp(reg_list[i]->feature->name, features[current_feature])) + continue; + + const char *type_str; + if (reg_list[i]->reg_data_type != NULL) { + if (reg_list[i]->reg_data_type->type == REG_TYPE_ARCH_DEFINED) { + /* generate reg_data_type); + + type_str = reg_list[i]->reg_data_type->id; + } else { + /* predefined type */ + type_str = gdb_get_reg_type_name( + reg_list[i]->reg_data_type->type); + } + } else { + /* Default type is "int" */ + type_str = "int"; + } + + xml_printf(&retval, &tdesc, &pos, &size, + "name); + xml_printf(&retval, &tdesc, &pos, &size, + " bitsize=\"%d\"", reg_list[i]->size); + xml_printf(&retval, &tdesc, &pos, &size, + " regnum=\"%d\"", 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 != NULL) + xml_printf(&retval, &tdesc, &pos, &size, + " group=\"%s\"", reg_list[i]->group); + + xml_printf(&retval, &tdesc, &pos, &size, + "/>\n"); + } + + xml_printf(&retval, &tdesc, &pos, &size, + "\n"); + + current_feature++; + } + } + + xml_printf(&retval, &tdesc, &pos, &size, + "\n"); + + free(reg_list); + free(features); + + 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 == NULL) { + LOG_ERROR("Unable to Generate Target Description"); + return ERROR_FAIL; + } + + char *tdesc = target_desc->tdesc; + uint32_t tdesc_length = target_desc->tdesc_length; + + if (tdesc == NULL) { + int retval = gdb_generate_target_description(target, &tdesc); + if (retval != ERROR_OK) { + LOG_ERROR("Unable to Generate Target Description"); + return ERROR_FAIL; + } + + tdesc_length = strlen(tdesc); + } + + char transfer_type; + + if (length < (tdesc_length - offset)) + transfer_type = 'm'; + else + transfer_type = 'l'; + + *chunk = malloc(length + 2); + if (*chunk == NULL) { + LOG_ERROR("Unable to allocate memory"); + return ERROR_FAIL; + } + + (*chunk)[0] = transfer_type; + if (transfer_type == 'm') { + strncpy((*chunk) + 1, tdesc + offset, length); + (*chunk)[1 + length] = '\0'; + } 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; + } + + target_desc->tdesc = tdesc; + target_desc->tdesc_length = tdesc_length; + + return ERROR_OK; +} + +static int gdb_target_description_supported(struct target *target, int *supported) +{ + int retval = ERROR_OK; + struct reg **reg_list = NULL; + int reg_list_size = 0; + int feature_list_size = 0; + char **features = NULL; + + retval = target_get_gdb_reg_list(target, ®_list, + ®_list_size, REG_CLASS_ALL); + if (retval != ERROR_OK) { + LOG_ERROR("get register list failed"); + goto error; + } + + if (reg_list_size <= 0) { + retval = ERROR_FAIL; + goto error; + } + + /* 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 (supported) { + if (feature_list_size) + *supported = 1; + else + *supported = 0; } + +error: + if (reg_list != NULL) + free(reg_list); + + if (features != NULL) + free(features); + + return retval; } -int gdb_query_packet(struct connection *connection, struct target *target, char *packet, int packet_size) +static int gdb_query_packet(struct connection *connection, + char *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 (strstr(packet, "qRcmd,")) - { - if (packet_size > 6) - { + if (strncmp(packet, "qRcmd,", 6) == 0) { + if (packet_size > 6) { char *cmd; - int i; - cmd = malloc((packet_size - 6)/2 + 1); - for (i = 0; i < (packet_size - 6)/2; i++) - { - uint32_t tmp; - sscanf(packet + 6 + 2*i, "%2" SCNx32 , &tmp); - cmd[i] = tmp; - } - cmd[(packet_size - 6)/2] = 0x0; + cmd = malloc((packet_size - 6) / 2 + 1); + int len = unhexify(cmd, packet + 6, (packet_size - 6) / 2); + cmd[len] = 0; /* We want to print all debug output to GDB connection */ log_add_callback(gdb_log_callback, connection); @@ -1602,11 +2292,8 @@ int gdb_query_packet(struct connection *connection, struct target *target, char } gdb_put_packet(connection, "OK", 2); return ERROR_OK; - } - else if (strstr(packet, "qCRC:")) - { - if (packet_size > 5) - { + } else if (strncmp(packet, "qCRC:", 5) == 0) { + if (packet_size > 5) { int retval; char gdb_reply[10]; char *separator; @@ -1619,8 +2306,7 @@ int gdb_query_packet(struct connection *connection, struct target *target, char addr = strtoul(packet, &separator, 16); - if (*separator != ',') - { + if (*separator != ',') { LOG_ERROR("incomplete read memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -1629,182 +2315,87 @@ int gdb_query_packet(struct connection *connection, struct target *target, char retval = target_checksum_memory(target, addr, len, &checksum); - if (retval == ERROR_OK) - { + if (retval == ERROR_OK) { snprintf(gdb_reply, 10, "C%8.8" PRIx32 "", checksum); gdb_put_packet(connection, gdb_reply, 9); - } - else - { - if ((retval = gdb_error(connection, retval)) != ERROR_OK) + } else { + retval = gdb_error(connection, retval); + if (retval != ERROR_OK) return retval; } return ERROR_OK; } - } - else if (strstr(packet, "qSupported")) - { + } else if (strncmp(packet, "qSupported", 10) == 0) { /* we currently support packet size and qXfer:memory-map:read (if enabled) - * disable qXfer:features:read for the moment */ + * qXfer:features:read is supported for some targets */ int retval = ERROR_OK; char *buffer = NULL; int pos = 0; int size = 0; + int gdb_target_desc_supported = 0; - xml_printf(&retval, &buffer, &pos, &size, - "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-;QStartNoAckMode+", - (GDB_BUFFER_SIZE - 1), ((gdb_use_memory_map == 1) && (flash_get_bank_count() > 0)) ? '+' : '-'); - - if (retval != ERROR_OK) - { - gdb_send_error(connection, 01); - return ERROR_OK; - } - - gdb_put_packet(connection, buffer, strlen(buffer)); - free(buffer); - - return ERROR_OK; - } - else if (strstr(packet, "qXfer:memory-map:read::") && (flash_get_bank_count() > 0)) - { - /* We get away with only specifying flash here. Regions that are not - * specified are treated as if we provided no memory map(if not we - * could detect the holes and mark them as RAM). - * Normally we only execute this code once, but no big deal if we - * have to regenerate it a couple of times. */ - - struct flash_bank *p; - char *xml = NULL; - int size = 0; - int pos = 0; - int retval = ERROR_OK; - - int offset; - int length; - char *separator; - int blocksize; - - /* skip command character */ - packet += 23; - - offset = strtoul(packet, &separator, 16); - length = strtoul(separator + 1, &separator, 16); - - xml_printf(&retval, &xml, &pos, &size, "\n"); - - /* - sort banks in ascending order, we need to make non-flash memory be ram(or rather - read/write) by default for GDB. - GDB does not have a concept of non-cacheable read/write memory. - */ - struct flash_bank **banks = malloc(sizeof(struct flash_bank *)*flash_get_bank_count()); - int i; - - for (i = 0; i < flash_get_bank_count(); i++) - { - p = get_flash_bank_by_num(i); - if (p == NULL) - { - free(banks); - retval = ERROR_FAIL; - gdb_send_error(connection, retval); - return retval; - } - banks[i]=p; + /* 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 = 0; } - qsort(banks, flash_get_bank_count(), sizeof(struct flash_bank *), compare_bank); - - uint32_t ram_start = 0; - for (i = 0; i < flash_get_bank_count(); i++) - { - p = banks[i]; - - if (ram_start < p->base) - { - xml_printf(&retval, &xml, &pos, &size, "\n", - ram_start, p->base-ram_start); - } - - /* if device has uneven sector sizes, eg. str7, lpc - * we pass the smallest sector size to gdb memory map */ - blocksize = gdb_calc_blocksize(p); - - xml_printf(&retval, &xml, &pos, &size, "\n" \ - "0x%x\n" \ - "\n", \ - p->base, p->size, blocksize); - ram_start = p->base + p->size; - } - if (ram_start != 0) - { - xml_printf(&retval, &xml, &pos, &size, "\n", - ram_start, 0-ram_start); - } else - { - /* a flash chip could be at the very end of the 32 bit address space, in which case - ram_start will be precisely 0 */ + /* support may be disabled globally */ + if (gdb_use_target_description == 0) { + if (gdb_target_desc_supported) + LOG_WARNING("Target Descriptions Supported, but disabled"); + gdb_target_desc_supported = 0; } - free(banks); - banks = NULL; + xml_printf(&retval, + &buffer, + &pos, + &size, + "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read%c;QStartNoAckMode+", + (GDB_BUFFER_SIZE - 1), + ((gdb_use_memory_map == 1) && (flash_get_bank_count() > 0)) ? '+' : '-', + (gdb_target_desc_supported == 1) ? '+' : '-'); - xml_printf(&retval, &xml, &pos, &size, "\n"); - - if (retval != ERROR_OK) - { - gdb_send_error(connection, retval); - return retval; - } - - if (offset + length > pos) - { - length = pos - offset; + if (retval != ERROR_OK) { + gdb_send_error(connection, 01); + return ERROR_OK; } - char *t = malloc(length + 1); - t[0] = 'l'; - memcpy(t + 1, xml + offset, length); - gdb_put_packet(connection, t, length + 1); + gdb_put_packet(connection, buffer, strlen(buffer)); + free(buffer); - free(t); - free(xml); return ERROR_OK; - } - else if (strstr(packet, "qXfer:features:read:")) - { + } 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 size = 0; - int pos = 0; int retval = ERROR_OK; int offset; unsigned int length; - char *annex; + char *annex = NULL; /* skip command character */ packet += 20; - if (decode_xfer_read(packet, &annex, &offset, &length) < 0) - { - gdb_send_error(connection, 01); - return ERROR_OK; - } - - if (strcmp(annex, "target.xml") != 0) - { + if (decode_xfer_read(packet, &annex, &offset, &length) < 0) { gdb_send_error(connection, 01); return ERROR_OK; } + free(annex); - xml_printf(&retval, &xml, &pos, &size, \ - "l < target version=\"1.0\">\n < architecture > arm\n\n"); - - if (retval != ERROR_OK) - { - gdb_send_error(connection, retval); + /* 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; } @@ -1812,9 +2403,7 @@ int gdb_query_packet(struct connection *connection, struct target *target, char free(xml); return ERROR_OK; - } - else if (strstr(packet, "QStartNoAckMode")) - { + } else if (strncmp(packet, "QStartNoAckMode", 15) == 0) { gdb_connection->noack_mode = 1; gdb_put_packet(connection, "OK", 2); return ERROR_OK; @@ -1824,7 +2413,8 @@ int gdb_query_packet(struct connection *connection, struct target *target, char return ERROR_OK; } -int gdb_v_packet(struct connection *connection, struct target *target, char *packet, int packet_size) +static int gdb_v_packet(struct connection *connection, + char *packet, int packet_size) { struct gdb_connection *gdb_connection = connection->priv; struct gdb_service *gdb_service = connection->service->priv; @@ -1832,36 +2422,31 @@ int gdb_v_packet(struct connection *connection, struct target *target, char *pac /* if flash programming disabled - send a empty reply */ - if (gdb_flash_program == 0) - { + if (gdb_flash_program == 0) { gdb_put_packet(connection, "", 0); return ERROR_OK; } - if (strstr(packet, "vFlashErase:")) - { + if (strncmp(packet, "vFlashErase:", 12) == 0) { unsigned long addr; unsigned long length; char *parse = packet + 12; - if (*parse == '\0') - { + if (*parse == '\0') { LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } addr = strtoul(parse, &parse, 16); - if (*(parse++) != ',' || *parse == '\0') - { + if (*(parse++) != ',' || *parse == '\0') { LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } length = strtoul(parse, &parse, 16); - if (*parse != '\0') - { + if (*parse != '\0') { LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -1871,81 +2456,82 @@ int gdb_v_packet(struct connection *connection, struct target *target, char *pac flash_set_dirty(); /* perform any target specific operations before the erase */ - target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_START); - result = flash_erase_address_range(gdb_service->target, addr, length); - target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_END); + target_call_event_callbacks(gdb_service->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. + */ + result = flash_erase_address_range(gdb_service->target, + false, addr, length); + + /* perform any target specific operations after the erase */ + target_call_event_callbacks(gdb_service->target, + TARGET_EVENT_GDB_FLASH_ERASE_END); /* perform erase */ - if (result != ERROR_OK) - { + 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); - } - else + } else gdb_put_packet(connection, "OK", 2); return ERROR_OK; } - if (strstr(packet, "vFlashWrite:")) - { + if (strncmp(packet, "vFlashWrite:", 12) == 0) { int retval; unsigned long addr; unsigned long length; char *parse = packet + 12; - if (*parse == '\0') - { + if (*parse == '\0') { LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } addr = strtoul(parse, &parse, 16); - if (*(parse++) != ':') - { + if (*(parse++) != ':') { LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } length = packet_size - (parse - packet); /* create a new image if there isn't already one */ - if (gdb_connection->vflash_image == NULL) - { + if (gdb_connection->vflash_image == NULL) { gdb_connection->vflash_image = malloc(sizeof(struct image)); image_open(gdb_connection->vflash_image, "", "build"); } /* create new section with content from packet buffer */ - if ((retval = image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (uint8_t*)parse)) != ERROR_OK) - { + retval = image_add_section(gdb_connection->vflash_image, + addr, length, 0x0, (uint8_t *)parse); + if (retval != ERROR_OK) return retval; - } gdb_put_packet(connection, "OK", 2); return ERROR_OK; } - if (!strcmp(packet, "vFlashDone")) - { + if (strncmp(packet, "vFlashDone", 10) == 0) { uint32_t written; /* process the flashing buffer. No need to erase as GDB * always issues a vFlashErase first. */ - target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_START); + target_call_event_callbacks(gdb_service->target, + TARGET_EVENT_GDB_FLASH_WRITE_START); result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0); target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_END); - if (result != ERROR_OK) - { + 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); - } - else - { + } else { LOG_DEBUG("wrote %u bytes from vFlash image to flash", (unsigned)written); gdb_put_packet(connection, "OK", 2); } @@ -1961,7 +2547,7 @@ int gdb_v_packet(struct connection *connection, struct target *target, char *pac return ERROR_OK; } -int gdb_detach(struct connection *connection, struct target *target) +static int gdb_detach(struct connection *connection) { struct gdb_service *gdb_service = connection->service->priv; @@ -1970,14 +2556,61 @@ int gdb_detach(struct connection *connection, struct target *target) 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 *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; + } + } + } + + 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->busy) - { + if (gdb_con->busy) { /* do not reply this using the O packet */ return; } @@ -1985,166 +2618,186 @@ static void gdb_log_callback(void *priv, const char *file, unsigned line, gdb_output_con(connection, string); } -/* Do not allocate this on the stack */ -char gdb_packet_buffer[GDB_BUFFER_SIZE]; - 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); - } -int gdb_input_inner(struct connection *connection) +static int gdb_input_inner(struct connection *connection) { + /* Do not allocate this on the stack */ + static char gdb_packet_buffer[GDB_BUFFER_SIZE]; + struct gdb_service *gdb_service = connection->service->priv; struct target *target = gdb_service->target; char *packet = gdb_packet_buffer; int packet_size; int retval; struct gdb_connection *gdb_con = connection->priv; - static int extended_protocol = 0; + static int extended_protocol; - /* drain input buffer */ - do - { + /* drain input buffer. If one of the packets fail, then an error + * packet is replied, if applicable. + * + * This loop will terminate and the error code is returned. + * + * The calling fn will check if this error is something that + * can be recovered from, or if the connection must be closed. + * + * If the error is recoverable, this fn is called again to + * drain the rest of the buffer. + */ + do { packet_size = GDB_BUFFER_SIZE-1; - if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK) - { + retval = gdb_get_packet(connection, packet, &packet_size); + if (retval != ERROR_OK) return retval; - } /* terminate with zero */ packet[packet_size] = 0; if (LOG_LEVEL_IS(LOG_LVL_DEBUG)) { if (packet[0] == 'X') { - // binary packets spew junk into the debug log stream - char buf[ 50 ]; + /* binary packets spew junk into the debug log stream */ + char buf[50]; int x; - for (x = 0 ; (x < 49) && (packet[x] != ':') ; x++) { + for (x = 0; (x < 49) && (packet[x] != ':'); x++) buf[x] = packet[x]; - } buf[x] = 0; LOG_DEBUG("received packet: '%s:'", buf); - } else { + } else LOG_DEBUG("received packet: '%s'", packet); - } } - if (packet_size > 0) - { + if (packet_size > 0) { retval = ERROR_OK; - switch (packet[0]) - { - case 'H': - /* Hct... -- set thread - * we don't have threads, send empty reply */ - gdb_put_packet(connection, NULL, 0); + switch (packet[0]) { + case 'T': /* Is thread alive? */ + gdb_thread_packet(connection, packet, packet_size); + break; + case 'H': /* Set current thread ( 'c' for step and continue, + * 'g' for all other operations ) */ + gdb_thread_packet(connection, packet, packet_size); break; case 'q': case 'Q': - retval = gdb_query_packet(connection, target, packet, packet_size); + 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 'g': - retval = gdb_get_registers_packet(connection, target, packet, packet_size); + retval = gdb_get_registers_packet(connection, packet, packet_size); break; case 'G': - retval = gdb_set_registers_packet(connection, target, packet, packet_size); + retval = gdb_set_registers_packet(connection, packet, packet_size); break; case 'p': - retval = gdb_get_register_packet(connection, target, packet, packet_size); + retval = gdb_get_register_packet(connection, packet, packet_size); break; case 'P': - retval = gdb_set_register_packet(connection, target, packet, packet_size); + retval = gdb_set_register_packet(connection, packet, packet_size); break; case 'm': - retval = gdb_read_memory_packet(connection, target, packet, packet_size); + retval = gdb_read_memory_packet(connection, packet, packet_size); break; case 'M': - retval = gdb_write_memory_packet(connection, target, packet, packet_size); + retval = gdb_write_memory_packet(connection, packet, packet_size); break; case 'z': case 'Z': - retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size); + retval = gdb_breakpoint_watchpoint_packet(connection, packet, packet_size); break; case '?': - gdb_last_signal_packet(connection, target, packet, packet_size); + gdb_last_signal_packet(connection, packet, packet_size); break; case 'c': case 's': - { - int retval = ERROR_OK; - - struct gdb_connection *gdb_con = connection->priv; - log_add_callback(gdb_log_callback, connection); - - bool nostep = false; - if (target->state == TARGET_RUNNING) - { - LOG_WARNING("The target is already running. Halt target before stepi/continue."); - retval = target_halt(target); - if (retval == ERROR_OK) - retval = target_wait_state(target, TARGET_HALTED, 100); - } 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 ((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_WARNING("stepi ignored. GDB will now fetch the register state from the target."); - } - gdb_con->sync = false; - - if ((retval!=ERROR_OK) || 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! */ - log_remove_callback(gdb_log_callback, connection); - } 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); - int retval = gdb_step_continue_packet(connection, target, packet, packet_size); - if (retval != ERROR_OK) - { - /* we'll never receive a halted condition... issue a false one.. */ + { + gdb_thread_packet(connection, packet, packet_size); + log_add_callback(gdb_log_callback, connection); + + if (gdb_con->mem_write_error) { + LOG_ERROR("Memory write failure!"); + + /* now that we have reported the memory write error, + * we can clear the condition */ + gdb_con->mem_write_error = false; + } + + bool nostep = false; + bool already_running = false; + if (target->state == TARGET_RUNNING) { + LOG_WARNING("WARNING! The target is already running. " + "All changes GDB did to registers will be discarded! " + "Waiting for target to halt."); + already_running = true; + } else if (target->state != TARGET_HALTED) { + LOG_WARNING("The target is not in the halted nor running stated, " \ + "stepi/continue ignored."); + nostep = true; + } 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_WARNING("stepi ignored. GDB will now fetch the register state " \ + "from the target."); + } + 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! */ + log_remove_callback(gdb_log_callback, connection); + } 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); } } } - break; + } + break; case 'v': - retval = gdb_v_packet(connection, target, packet, packet_size); + retval = gdb_v_packet(connection, packet, packet_size); break; case 'D': - retval = gdb_detach(connection, target); + retval = gdb_detach(connection); extended_protocol = 0; break; case 'X': - if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK) + retval = gdb_write_memory_binary_packet(connection, packet, packet_size); + if (retval != ERROR_OK) return retval; break; case 'k': - if (extended_protocol != 0) + if (extended_protocol != 0) { + gdb_con->attached = false; break; + } gdb_put_packet(connection, "OK", 2); return ERROR_SERVER_REMOTE_CLOSED; case '!': @@ -2156,10 +2809,40 @@ int gdb_input_inner(struct connection *connection) /* handle extended restart packet */ breakpoint_clear_target(gdb_service->target); watchpoint_clear_target(gdb_service->target); - command_run_linef(connection->cmd_ctx, - "ocd_gdb_restart %s", + 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); + break; + + case 'j': + /* 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': + /* 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 '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; + log_add_callback(gdb_log_callback, connection); + gdb_fileio_response_packet(connection, packet, packet_size); break; + default: /* ignore unknown packets */ LOG_DEBUG("ignoring 0x%2.2x packet", packet[0]); @@ -2172,18 +2855,13 @@ int gdb_input_inner(struct connection *connection) return retval; } - if (gdb_con->ctrl_c) - { - if (target->state == TARGET_RUNNING) - { + if (gdb_con->ctrl_c) { + if (target->state == TARGET_RUNNING) { retval = target_halt(target); if (retval != ERROR_OK) - { target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT); - } gdb_con->ctrl_c = 0; - } else - { + } else { LOG_INFO("The target is not running when halt was requested, stopping GDB."); target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT); } @@ -2194,7 +2872,7 @@ int gdb_input_inner(struct connection *connection) return ERROR_OK; } -int gdb_input(struct connection *connection) +static int gdb_input(struct connection *connection) { int retval = gdb_input_inner(connection); struct gdb_connection *gdb_con = connection->priv; @@ -2209,67 +2887,69 @@ int gdb_input(struct connection *connection) return ERROR_OK; } -static int gdb_target_start(struct target *target, uint16_t port) +static int gdb_target_start(struct target *target, const char *port) { - bool use_pipes = 0 == port; - struct gdb_service *gdb_service = malloc(sizeof(struct gdb_service)); + struct gdb_service *gdb_service; + int ret; + gdb_service = malloc(sizeof(struct gdb_service)); + if (NULL == gdb_service) return -ENOMEM; gdb_service->target = target; + gdb_service->core[0] = -1; + gdb_service->core[1] = -1; + target->gdb_service = gdb_service; - add_service("gdb", use_pipes ? CONNECTION_PIPE : CONNECTION_TCP, + ret = add_service("gdb", port, 1, &gdb_new_connection, &gdb_input, &gdb_connection_closed, gdb_service); - - const char *name = target_name(target); - if (use_pipes) - LOG_DEBUG("gdb service for target '%s' using pipes", name); - else - LOG_DEBUG("gdb service for target '%s' on TCP port %u", name, port); - return ERROR_OK; + /* initialialize all targets gdb service with the same pointer */ + { + struct target_list *head; + struct target *curr; + head = target->head; + while (head != (struct target_list *)NULL) { + curr = head->target; + if (curr != target) + curr->gdb_service = gdb_service; + head = head->next; + } + } + return ret; } -int gdb_target_add_one(struct target *target) +static int gdb_target_add_one(struct target *target) { - if (gdb_port == 0 && server_use_pipes == 0) - { - LOG_INFO("gdb port disabled"); + /* one gdb instance per smp list */ + if ((target->smp) && (target->gdb_service)) return ERROR_OK; + int retval = gdb_target_start(target, gdb_port_next); + if (retval == ERROR_OK) { + 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); + gdb_port_next = alloc_printf("%d", portnumber+1); + } + } } - if (0 == gdb_port_next) - gdb_port_next = gdb_port; - - bool use_pipes = server_use_pipes; - static bool server_started_with_pipes = false; - if (server_started_with_pipes) - { - LOG_WARNING("gdb service permits one target when using pipes"); - if (0 == gdb_port) - return ERROR_OK; - - use_pipes = false; - } - - int e = gdb_target_start(target, use_pipes ? 0 : gdb_port_next); - if (ERROR_OK == e) - { - server_started_with_pipes |= use_pipes; - gdb_port_next++; - } - return e; + return retval; } int gdb_target_add_all(struct target *target) { - if (NULL == target) - { + if (NULL == target) { LOG_WARNING("gdb services need one or more targets defined"); return ERROR_OK; } - while (NULL != target) - { + while (NULL != target) { int retval = gdb_target_add_one(target); if (ERROR_OK != retval) return retval; @@ -2283,14 +2963,11 @@ int gdb_target_add_all(struct target *target) COMMAND_HANDLER(handle_gdb_sync_command) { if (CMD_ARGC != 0) - { return ERROR_COMMAND_SYNTAX_ERROR; - } - if (current_gdb_connection == NULL) - { + if (current_gdb_connection == NULL) { command_print(CMD_CTX, - "gdb_sync command can only be run from within gdb using \"monitor gdb_sync\""); + "gdb_sync command can only be run from within gdb using \"monitor gdb_sync\""); return ERROR_FAIL; } @@ -2302,119 +2979,189 @@ COMMAND_HANDLER(handle_gdb_sync_command) /* daemon configuration command gdb_port */ COMMAND_HANDLER(handle_gdb_port_command) { - int retval = CALL_COMMAND_HANDLER(server_port_command, &gdb_port); - if (ERROR_OK == retval) - gdb_port_next = gdb_port; + int retval = CALL_COMMAND_HANDLER(server_pipe_command, &gdb_port); + if (ERROR_OK == retval) { + free(gdb_port_next); + gdb_port_next = strdup(gdb_port); + } return retval; } COMMAND_HANDLER(handle_gdb_memory_map_command) { - if (CMD_ARGC == 1) - COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_use_memory_map); + if (CMD_ARGC != 1) + return ERROR_COMMAND_SYNTAX_ERROR; - return ERROR_COMMAND_SYNTAX_ERROR; + COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_use_memory_map); + return ERROR_OK; } COMMAND_HANDLER(handle_gdb_flash_program_command) { - if (CMD_ARGC == 1) - COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_flash_program); + if (CMD_ARGC != 1) + return ERROR_COMMAND_SYNTAX_ERROR; - return ERROR_COMMAND_SYNTAX_ERROR; + COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_flash_program); + return ERROR_OK; } COMMAND_HANDLER(handle_gdb_report_data_abort_command) { - if (CMD_ARGC == 1) - COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_report_data_abort); + if (CMD_ARGC != 1) + return ERROR_COMMAND_SYNTAX_ERROR; - return ERROR_COMMAND_SYNTAX_ERROR; + COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_report_data_abort); + return ERROR_OK; } /* gdb_breakpoint_override */ COMMAND_HANDLER(handle_gdb_breakpoint_override_command) { - if (CMD_ARGC == 0) - { - - } else if (CMD_ARGC == 1) - { + if (CMD_ARGC == 0) { + /* nothing */ + } 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) - { + else if (strcmp(CMD_ARGV[0], "soft") == 0) gdb_breakpoint_override_type = BKPT_SOFT; - } else if (strcmp(CMD_ARGV[0], "disable") == 0) - { + else if (strcmp(CMD_ARGV[0], "disable") == 0) gdb_breakpoint_override = 0; - } } 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("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; + } + + 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 == NULL) { + retval = ERROR_FAIL; + goto out; + } + + 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; + } + + 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_command_handlers[] = { { .name = "gdb_sync", - .handler = &handle_gdb_sync_command, + .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 = "gdb_port", - .handler = &handle_gdb_port_command, + .handler = handle_gdb_port_command, .mode = COMMAND_ANY, - .help = "daemon configuration command gdb_port", - .usage = "", + .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, \"disable\" 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 = "gdb_memory_map", - .handler = &handle_gdb_memory_map_command, + .handler = handle_gdb_memory_map_command, .mode = COMMAND_CONFIG, .help = "enable or disable memory map", - .usage = "enable|disable" + .usage = "('enable'|'disable')" }, { .name = "gdb_flash_program", - .handler = &handle_gdb_flash_program_command, + .handler = handle_gdb_flash_program_command, .mode = COMMAND_CONFIG, .help = "enable or disable flash program", - .usage = "enable|disable" + .usage = "('enable'|'disable')" }, { .name = "gdb_report_data_abort", - .handler = &handle_gdb_report_data_abort_command, + .handler = handle_gdb_report_data_abort_command, .mode = COMMAND_CONFIG, .help = "enable or disable reporting data aborts", - .usage = "enable|disable" + .usage = "('enable'|'disable')" }, { .name = "gdb_breakpoint_override", - .handler = &handle_gdb_breakpoint_override_command, + .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 = "gdb_target_description", + .handler = handle_gdb_target_description_command, + .mode = COMMAND_CONFIG, + .help = "enable or disable target description", + .usage = "('enable'|'disable')" + }, + { + .name = "gdb_save_tdesc", + .handler = handle_gdb_save_tdesc_command, .mode = COMMAND_EXEC, - .help = "force type of breakpoint " - "used by gdb 'break' commands.", - .usage = "hard|soft|disable", + .help = "Save the target description file", }, 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); }