diff options
Diffstat (limited to 'src/server/gdb_server.c')
| -rw-r--r-- | src/server/gdb_server.c | 4214 |
1 files changed, 2107 insertions, 2107 deletions
diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c index 49630579..fa203e7a 100644 --- a/src/server/gdb_server.c +++ b/src/server/gdb_server.c @@ -1,2107 +1,2107 @@ -/*************************************************************************** - * Copyright (C) 2005 by Dominic Rath * - * Dominic.Rath@gmx.de * - * * - * This program is free software; you can redistribute it and/or modify * - * it under the terms of the GNU General Public License as published by * - * the Free Software Foundation; either version 2 of the License, or * - * (at your option) any later version. * - * * - * This program is distributed in the hope that it will be useful, * - * but WITHOUT ANY WARRANTY; without even the implied warranty of * - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * - * GNU General Public License for more details. * - * * - * You should have received a copy of the GNU General Public License * - * along with this program; if not, write to the * - * Free Software Foundation, Inc., * - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * - ***************************************************************************/ -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "replacements.h" - -#include "gdb_server.h" - -#include "server.h" -#include "log.h" -#include "binarybuffer.h" -#include "jtag.h" -#include "breakpoints.h" -#include "flash.h" -#include "target_request.h" -#include "configuration.h" - -#include <string.h> -#include <errno.h> -#include <unistd.h> -#include <stdlib.h> - -#if 0 -#define _DEBUG_GDB_IO_ -#endif - -static unsigned short gdb_port; -static const char *DIGITS = "0123456789abcdef"; - -static void gdb_log_callback(void *priv, const char *file, int line, - const char *function, const char *format, va_list args); - -enum gdb_detach_mode -{ - GDB_DETACH_RESUME, - GDB_DETACH_RESET, - GDB_DETACH_HALT, - GDB_DETACH_NOTHING -}; - -/* target behaviour on gdb detach */ -enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME; - -/* set if we are sending a memory map to gdb - * via qXfer:memory-map:read packet */ -int gdb_use_memory_map = 0; -int gdb_flash_program = 0; - -/* 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; - -int gdb_last_signal(target_t *target) -{ - switch (target->debug_reason) - { - case DBG_REASON_DBGRQ: - return 0x2; /* SIGINT */ - case DBG_REASON_BREAKPOINT: - case DBG_REASON_WATCHPOINT: - case DBG_REASON_WPTANDBKPT: - return 0x05; /* SIGTRAP */ - case DBG_REASON_SINGLESTEP: - return 0x05; /* SIGTRAP */ - case DBG_REASON_NOTHALTED: - return 0x0; /* no signal... shouldn't happen */ - default: - ERROR("BUG: undefined debug reason"); - exit(-1); - } -} - -int gdb_get_char(connection_t *connection, int* next_char) -{ - gdb_connection_t *gdb_con = connection->priv; - -#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_ - DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); -#endif - - return ERROR_OK; - } - - for (;;) - { -#ifndef _WIN32 - /* a non-blocking socket will block if there is 0 bytes available on the socket, - * but return with as many bytes as are available immediately - */ - struct timeval tv; - fd_set read_fds; - - FD_ZERO(&read_fds); - FD_SET(connection->fd, &read_fds); - - tv.tv_sec = 1; - tv.tv_usec = 0; - if (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 - */ - return ERROR_GDB_TIMEOUT; - } -#endif - 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) - { - gdb_con->closed = 1; - return ERROR_SERVER_REMOTE_CLOSED; - } - -#ifdef _WIN32 - errno = WSAGetLastError(); - - switch(errno) - { - case WSAEWOULDBLOCK: - usleep(1000); - break; - case WSAECONNABORTED: - return ERROR_SERVER_REMOTE_CLOSED; - case WSAECONNRESET: - return ERROR_SERVER_REMOTE_CLOSED; - default: - ERROR("read: %d", errno); - exit(-1); - } -#else - switch(errno) - { - case EAGAIN: - usleep(1000); - break; - case ECONNABORTED: - return ERROR_SERVER_REMOTE_CLOSED; - case ECONNRESET: - return ERROR_SERVER_REMOTE_CLOSED; - default: - ERROR("read: %s", strerror(errno)); - return ERROR_SERVER_REMOTE_CLOSED; - } -#endif - } - -#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("received '%s'", debug_buffer); - free(debug_buffer); -#endif - - gdb_con->buf_p = gdb_con->buffer; - gdb_con->buf_cnt--; - *next_char = *(gdb_con->buf_p++); - if (gdb_con->buf_cnt > 0) - connection->input_pending = 1; - else - connection->input_pending = 0; -#ifdef _DEBUG_GDB_IO_ - DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); -#endif - - return ERROR_OK; -} - -int gdb_putback_char(connection_t *connection, int last_char) -{ - gdb_connection_t *gdb_con = connection->priv; - - if (gdb_con->buf_p > gdb_con->buffer) - { - *(--gdb_con->buf_p) = last_char; - gdb_con->buf_cnt++; - } - else - { - ERROR("BUG: couldn't put character back"); - } - - return ERROR_OK; -} - -/* 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(connection_t *connection, void *data, int len) -{ - gdb_connection_t *gdb_con = connection->priv; - if (gdb_con->closed) - return ERROR_SERVER_REMOTE_CLOSED; - - if (write_socket(connection->fd, data, len) == len) - { - return ERROR_OK; - } - gdb_con->closed = 1; - return ERROR_SERVER_REMOTE_CLOSED; -} - -int gdb_put_packet_inner(connection_t *connection, char *buffer, int len) -{ - int i; - unsigned char my_checksum = 0; -#ifdef _DEBUG_GDB_IO_ - char *debug_buffer; -#endif - int reply; - int retval; - gdb_connection_t *gdb_con = connection->priv; - - for (i = 0; i < len; i++) - my_checksum += buffer[i]; - - while (1) - { -#ifdef _DEBUG_GDB_IO_ - debug_buffer = malloc(len + 1); - memcpy(debug_buffer, buffer, len); - debug_buffer[len] = 0; - DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum); - free(debug_buffer); -#endif -#if 0 - char checksum[3]; - gdb_write(connection, "$", 1); - if (len > 0) - gdb_write(connection, buffer, len); - gdb_write(connection, "#", 1); - - snprintf(checksum, 3, "%2.2x", my_checksum); - - gdb_write(connection, checksum, 2); -#else - void *allocated = NULL; - char stackAlloc[1024]; - char *t = stackAlloc; - int totalLen = 1 + len + 1 + 2; - if (totalLen > sizeof(stackAlloc)) - { - allocated = malloc(totalLen); - t = allocated; - if (allocated == NULL) - { - ERROR("Ran out of memory trying to reply packet %d\n", totalLen); - exit(-1); - } - } - t[0] = '$'; - memcpy(t + 1, buffer, len); - t[1 + len] = '#'; - t[1 + len + 1] = DIGITS[(my_checksum >> 4) & 0xf]; - t[1 + len + 2] = DIGITS[my_checksum & 0xf]; - - gdb_write(connection, t, totalLen); - - if (allocated) - { - free(allocated); - } -#endif - if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK) - return retval; - - if (reply == '+') - break; - else if (reply == '-') - { - /* Stop sending output packets for now */ - log_setCallback(NULL, NULL); - WARNING("negative reply, retrying"); - } - else if (reply == 0x3) - { - gdb_con->ctrl_c = 1; - if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK) - return retval; - if (reply == '+') - break; - else if (reply == '-') - { - /* Stop sending output packets for now */ - log_setCallback(NULL, NULL); - WARNING("negative reply, retrying"); - } - else - { - ERROR("unknown character 0x%2.2x in reply, dropping connection", reply); - return ERROR_SERVER_REMOTE_CLOSED; - } - } - else - { - ERROR("unknown character 0x%2.2x in reply, dropping connection", reply); - return ERROR_SERVER_REMOTE_CLOSED; - } - } - if (gdb_con->closed) - return ERROR_SERVER_REMOTE_CLOSED; - - return ERROR_OK; -} - -int gdb_put_packet(connection_t *connection, char *buffer, int len) -{ - gdb_connection_t *gdb_con = connection->priv; - gdb_con->busy = 1; - int retval = gdb_put_packet_inner(connection, buffer, len); - gdb_con->busy = 0; - return retval; -} - -int gdb_get_packet_inner(connection_t *connection, char *buffer, int *len) -{ - int character; - int count = 0; - int retval; - char checksum[3]; - unsigned char my_checksum = 0; - gdb_connection_t *gdb_con = connection->priv; - - while (1) - { - do - { - if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) - return retval; - -#ifdef _DEBUG_GDB_IO_ - DEBUG("character: '%c'", character); -#endif - - switch (character) - { - case '$': - break; - case '+': - WARNING("acknowledgment received, but no packet pending"); - break; - case '-': - WARNING("negative acknowledgment, but no packet pending"); - break; - case 0x3: - gdb_con->ctrl_c = 1; - *len = 0; - return ERROR_OK; - default: - WARNING("ignoring character 0x%x", character); - break; - } - } while (character != '$'); - - my_checksum = 0; - - count = 0; - gdb_connection_t *gdb_con = connection->priv; - 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)) - { - /* 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; - i = 0; - int done = 0; - while (i < run) - { - character = *buf++; - i++; - if (character == '#') - { - /* Danger! character can be '#' when esc is - * used so we need an explicit boolean for done here. - */ - done = 1; - break; - } - - if (character == '}') - { - /* data transmitted in binary mode (X packet) - * uses 0x7d as escape character */ - my_checksum += character & 0xff; - character = *buf++; - i++; - my_checksum += character & 0xff; - buffer[count++] = (character ^ 0x20) & 0xff; - } else - { - my_checksum += character & 0xff; - buffer[count++] = character & 0xff; - } - } - gdb_con->buf_p += i; - gdb_con->buf_cnt -= i; - if (done) - break; - } - if (count > *len) - { - ERROR("packet buffer too small"); - return ERROR_GDB_BUFFER_TOO_SMALL; - } - - if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) - return retval; - - if (character == '#') - break; - - 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; - my_checksum += character & 0xff; - buffer[count++] = (character ^ 0x20) & 0xff; - } - else - { - my_checksum += character & 0xff; - buffer[count++] = character & 0xff; - } - - } - - *len = count; - - if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) - return retval; - checksum[0] = character; - if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) - return retval; - checksum[1] = character; - checksum[2] = 0; - - if (my_checksum == strtoul(checksum, NULL, 16)) - { - gdb_write(connection, "+", 1); - break; - } - - WARNING("checksum error, requesting retransmission"); - gdb_write(connection, "-", 1); - } - if (gdb_con->closed) - return ERROR_SERVER_REMOTE_CLOSED; - - return ERROR_OK; -} - -int gdb_get_packet(connection_t *connection, char *buffer, int *len) -{ - gdb_connection_t *gdb_con = connection->priv; - gdb_con->busy = 1; - int retval = gdb_get_packet_inner(connection, buffer, len); - gdb_con->busy = 0; - return retval; -} - -int gdb_output_con(connection_t *connection, char* line) -{ - char *hex_buffer; - int i, bin_size; - - bin_size = strlen(line); - - hex_buffer = malloc(bin_size*2 + 4); - - hex_buffer[0] = 'O'; - for (i=0; i<bin_size; i++) - snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]); - hex_buffer[bin_size*2+1] = '0'; - hex_buffer[bin_size*2+2] = 'a'; - hex_buffer[bin_size*2+3] = 0x0; - - gdb_put_packet(connection, hex_buffer, bin_size*2 + 3); - - free(hex_buffer); - return ERROR_OK; -} - -int gdb_output(struct command_context_s *context, char* line) -{ - /* this will be dumped to the log and also sent as an O packet if possible */ - USER(line); - return ERROR_OK; -} - -int gdb_program_handler(struct target_s *target, enum target_event event, void *priv) -{ - FILE *script; - struct command_context_s *cmd_ctx = priv; - - if (target->gdb_program_script) - { - script = open_file_from_path(cmd_ctx, target->gdb_program_script, "r"); - if (!script) - { - ERROR("couldn't open script file %s", target->gdb_program_script); - return ERROR_OK; - } - - INFO("executing gdb_program script '%s'", target->gdb_program_script); - command_run_file(cmd_ctx, script, COMMAND_EXEC); - fclose(script); - - jtag_execute_queue(); - } - - return ERROR_OK; -} - -int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv) -{ - connection_t *connection = priv; - gdb_connection_t *gdb_connection = connection->priv; - char sig_reply[4]; - int signal; - - switch (event) - { - case TARGET_EVENT_HALTED: - /* In the GDB protocol when we are stepping or coninuing execution, - * we have a lingering reply. Upon receiving a halted event - * when we have that lingering packet, we reply to the original - * step or continue packet. - * - * Executing monitor commands can bring the target in and - * out of the running state so we'll see lots of TARGET_EVENT_XXX - * that are to be ignored. - */ - if (gdb_connection->frontend_state == TARGET_RUNNING) - { - /* stop forwarding log packets! */ - log_setCallback(NULL, NULL); - - if (gdb_connection->ctrl_c) - { - signal = 0x2; - gdb_connection->ctrl_c = 0; - } - else - { - signal = gdb_last_signal(target); - } - - snprintf(sig_reply, 4, "T%2.2x", signal); - gdb_put_packet(connection, sig_reply, 3); - gdb_connection->frontend_state = TARGET_HALTED; - } - break; - case TARGET_EVENT_GDB_PROGRAM: - gdb_program_handler(target, event, connection->cmd_ctx); - break; - default: - break; - } - - return ERROR_OK; -} - -int gdb_new_connection(connection_t *connection) -{ - gdb_connection_t *gdb_connection = malloc(sizeof(gdb_connection_t)); - gdb_service_t *gdb_service = connection->service->priv; - int retval; - int initial_ack; - - connection->priv = gdb_connection; - - /* initialize gdb connection information */ - gdb_connection->buf_p = gdb_connection->buffer; - gdb_connection->buf_cnt = 0; - gdb_connection->ctrl_c = 0; - gdb_connection->frontend_state = TARGET_HALTED; - gdb_connection->vflash_image = NULL; - gdb_connection->closed = 0; - gdb_connection->busy = 0; - - /* output goes through gdb connection */ - command_set_output_handler(connection->cmd_ctx, gdb_output, connection); - - /* register callback to be informed about target events */ - target_register_event_callback(gdb_target_callback_event_handler, connection); - - /* a gdb session just attached, put the target in halt mode */ - if (((retval = gdb_service->target->type->halt(gdb_service->target)) != ERROR_OK) && - (retval != ERROR_TARGET_ALREADY_HALTED)) - { - ERROR("error(%d) when trying to halt target, falling back to \"reset halt\"", retval); - command_run_line(connection->cmd_ctx, "reset halt"); - } - - /* This will time out after 1 second */ - command_run_line(connection->cmd_ctx, "wait_halt 1"); - - /* remove the initial ACK from the incoming buffer */ - if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK) - return retval; - - if (initial_ack != '+') - gdb_putback_char(connection, initial_ack); - - return ERROR_OK; -} - -int gdb_connection_closed(connection_t *connection) -{ - gdb_service_t *gdb_service = connection->service->priv; - gdb_connection_t *gdb_connection = connection->priv; - - /* see if an image built with vFlash commands is left */ - if (gdb_connection->vflash_image) - { - image_close(gdb_connection->vflash_image); - free(gdb_connection->vflash_image); - gdb_connection->vflash_image = NULL; - } - - /* if this connection registered a debug-message receiver delete it */ - delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target); - - if (connection->priv) - { - free(connection->priv); - connection->priv = NULL; - } - else - { - ERROR("BUG: connection->priv == NULL"); - } - - target_unregister_event_callback(gdb_target_callback_event_handler, connection); - log_setCallback(NULL, NULL); - - return ERROR_OK; -} - -void gdb_send_error(connection_t *connection, u8 the_error) -{ - char err[4]; - snprintf(err, 4, "E%2.2X", the_error ); - gdb_put_packet(connection, err, 3); -} - -int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size) -{ - char sig_reply[4]; - int signal; - - signal = gdb_last_signal(target); - - snprintf(sig_reply, 4, "S%2.2x", signal); - gdb_put_packet(connection, sig_reply, 3); - - return ERROR_OK; -} - -/* Convert register to string of bits. NB! The # of bits in the - * register might be non-divisible by 8(a byte), in which - * case an entire byte is shown. */ -void gdb_str_to_target(target_t *target, char *tstr, reg_t *reg) -{ - int i; - - u8 *buf; - int buf_len; - buf = reg->value; - buf_len = CEIL(reg->size, 8); - - if (target->endianness == TARGET_LITTLE_ENDIAN) - { - for (i = 0; i < buf_len; i++) - { - tstr[i*2] = DIGITS[(buf[i]>>4) & 0xf]; - tstr[i*2+1] = DIGITS[buf[i]&0xf]; - } - } - else - { - for (i = 0; i < buf_len; i++) - { - tstr[(buf_len-1-i)*2] = DIGITS[(buf[i]>>4)&0xf]; - tstr[(buf_len-1-i)*2+1] = DIGITS[buf[i]&0xf]; - } - } -} - -void gdb_target_to_str(target_t *target, char *tstr, char *str) -{ - int str_len = strlen(tstr); - int i; - - if (str_len % 2) - { - ERROR("BUG: gdb value with uneven number of characters encountered"); - exit(-1); - } - - if (target->endianness == TARGET_LITTLE_ENDIAN) - { - for (i = 0; i < str_len; i+=2) - { - str[str_len - i - 1] = tstr[i + 1]; - str[str_len - i - 2] = tstr[i]; - } - } - else - { - for (i = 0; i < str_len; i++) - { - str[i] = tstr[i]; - } - } -} - -int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size) -{ - reg_t **reg_list; - int reg_list_size; - int retval; - int reg_packet_size = 0; - char *reg_packet; - char *reg_packet_p; - int i; - -#ifdef _DEBUG_GDB_IO_ - DEBUG("-"); -#endif - - if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb requested registers but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } - } - - for (i = 0; i < reg_list_size; i++) - { - reg_packet_size += reg_list[i]->size; - } - - reg_packet = malloc(CEIL(reg_packet_size, 8) * 2); - reg_packet_p = reg_packet; - - for (i = 0; i < reg_list_size; i++) - { - gdb_str_to_target(target, reg_packet_p, reg_list[i]); - reg_packet_p += CEIL(reg_list[i]->size, 8) * 2; - } - -#ifdef _DEBUG_GDB_IO_ - { - char *reg_packet_p; - reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2); - DEBUG("reg_packet: %s", reg_packet_p); - free(reg_packet_p); - } -#endif - - gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2); - free(reg_packet); - - free(reg_list); - - return ERROR_OK; -} - -int gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - int i; - reg_t **reg_list; - int reg_list_size; - int retval; - char *packet_p; - -#ifdef _DEBUG_GDB_IO_ - DEBUG("-"); -#endif - - /* skip command character */ - packet++; - packet_size--; - - if (packet_size % 2) - { - WARNING("GDB set_registers packet with uneven characters received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb tried to registers but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } - } - - packet_p = packet; - for (i = 0; i < reg_list_size; i++) - { - u8 *bin_buf; - char *hex_buf; - reg_arch_type_t *arch_type; - - /* convert from GDB-string (target-endian) to hex-string (big-endian) */ - hex_buf = malloc(CEIL(reg_list[i]->size, 8) * 2); - gdb_target_to_str(target, packet_p, hex_buf); - - /* convert hex-string to binary buffer */ - bin_buf = malloc(CEIL(reg_list[i]->size, 8)); - str_to_buf(hex_buf, CEIL(reg_list[i]->size, 8) * 2, bin_buf, reg_list[i]->size, 16); - - /* get register arch_type, and call set method */ - arch_type = register_get_arch_type(reg_list[i]->arch_type); - if (arch_type == NULL) - { - ERROR("BUG: encountered unregistered arch type"); - exit(-1); - } - arch_type->set(reg_list[i], bin_buf); - - /* advance packet pointer */ - packet_p += (CEIL(reg_list[i]->size, 8) * 2); - - free(bin_buf); - free(hex_buf); - } - - /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */ - free(reg_list); - - gdb_put_packet(connection, "OK", 2); - - return ERROR_OK; -} - -int gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - char *reg_packet; - int reg_num = strtoul(packet + 1, NULL, 16); - reg_t **reg_list; - int reg_list_size; - int retval; - -#ifdef _DEBUG_GDB_IO_ - DEBUG("-"); -#endif - - if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb requested registers but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } - } - - if (reg_list_size <= reg_num) - { - ERROR("gdb requested a non-existing register"); - exit(-1); - } - - reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2); - - gdb_str_to_target(target, reg_packet, reg_list[reg_num]); - - gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2); - - free(reg_list); - free(reg_packet); - - return ERROR_OK; -} - -int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - char *separator; - char *hex_buf; - u8 *bin_buf; - int reg_num = strtoul(packet + 1, &separator, 16); - reg_t **reg_list; - int reg_list_size; - int retval; - reg_arch_type_t *arch_type; - - DEBUG("-"); - - if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) - { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb tried to set a register but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } - } - - if (reg_list_size < reg_num) - { - ERROR("gdb requested a non-existing register"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - if (*separator != '=') - { - ERROR("GDB 'set register packet', but no '=' following the register number"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - /* convert from GDB-string (target-endian) to hex-string (big-endian) */ - hex_buf = malloc(CEIL(reg_list[reg_num]->size, 8) * 2); - gdb_target_to_str(target, separator + 1, hex_buf); - - /* convert hex-string to binary buffer */ - bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8)); - str_to_buf(hex_buf, CEIL(reg_list[reg_num]->size, 8) * 2, bin_buf, reg_list[reg_num]->size, 16); - - /* get register arch_type, and call set method */ - arch_type = register_get_arch_type(reg_list[reg_num]->arch_type); - if (arch_type == NULL) - { - ERROR("BUG: encountered unregistered arch type"); - exit(-1); - } - arch_type->set(reg_list[reg_num], bin_buf); - - gdb_put_packet(connection, "OK", 2); - - free(bin_buf); - free(hex_buf); - free(reg_list); - - return ERROR_OK; -} - -int gdb_memory_packet_error(connection_t *connection, int retval) -{ - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb tried to read memory but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - case ERROR_TARGET_DATA_ABORT: - gdb_send_error(connection, EIO); - break; - case ERROR_TARGET_TRANSLATION_FAULT: - gdb_send_error(connection, EFAULT); - break; - case ERROR_TARGET_UNALIGNED_ACCESS: - gdb_send_error(connection, EFAULT); - break; - default: - /* This could be that the target reset itself. */ - ERROR("unexpected error %i. Dropping connection.", retval); - return ERROR_SERVER_REMOTE_CLOSED; - } - - return ERROR_OK; -} - -/* We don't have to worry about the default 2 second timeout for GDB packets, - * because GDB breaks up large memory reads into smaller reads. - * - * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192????? - */ -int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - char *separator; - u32 addr = 0; - u32 len = 0; - - u8 *buffer; - char *hex_buffer; - - int retval = ERROR_OK; - - /* skip command character */ - packet++; - - addr = strtoul(packet, &separator, 16); - - if (*separator != ',') - { - ERROR("incomplete read memory packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - len = strtoul(separator+1, NULL, 16); - - buffer = malloc(len); - - DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); - - retval = target_read_buffer(target, addr, len, buffer); - - if ((retval == ERROR_TARGET_DATA_ABORT) && (!gdb_report_data_abort)) - { - /* TODO : Here we have to lie and send back all zero's lest stack traces won't work. - * At some point this might be fixed in GDB, in which case this code can be removed. - * - * OpenOCD developers are acutely aware of this problem, but there is nothing - * gained by involving the user in this problem that hopefully will get resolved - * eventually - * - * http://sourceware.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=2395 - * - * For now, the default is to fix up things to make current GDB versions work. - * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command. - */ - memset(buffer, 0, len); - retval = ERROR_OK; - } - - if (retval == ERROR_OK) - { - hex_buffer = malloc(len * 2 + 1); - - int i; - for (i = 0; i < len; i++) - { - u8 t = buffer[i]; - hex_buffer[2 * i] = DIGITS[(t >> 4) & 0xf]; - hex_buffer[2 * i + 1] = DIGITS[t & 0xf]; - } - - gdb_put_packet(connection, hex_buffer, len * 2); - - free(hex_buffer); - } - else - { - retval = gdb_memory_packet_error(connection, retval); - } - - free(buffer); - - return retval; -} - -int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - char *separator; - u32 addr = 0; - u32 len = 0; - - u8 *buffer; - - int i; - int retval; - - /* skip command character */ - packet++; - - addr = strtoul(packet, &separator, 16); - - if (*separator != ',') - { - ERROR("incomplete write memory packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - len = strtoul(separator+1, &separator, 16); - - if (*(separator++) != ':') - { - ERROR("incomplete write memory packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - buffer = malloc(len); - - DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); - - for (i=0; i<len; i++) - { - u32 tmp; - sscanf(separator + 2*i, "%2x", &tmp); - buffer[i] = tmp; - } - - retval = target_write_buffer(target, addr, len, buffer); - - if (retval == ERROR_OK) - { - gdb_put_packet(connection, "OK", 2); - } - else - { - if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK) - return retval; - } - - free(buffer); - - return ERROR_OK; -} - -int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - char *separator; - u32 addr = 0; - u32 len = 0; - - int retval; - - /* skip command character */ - packet++; - - addr = strtoul(packet, &separator, 16); - - if (*separator != ',') - { - ERROR("incomplete write memory binary packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - len = strtoul(separator+1, &separator, 16); - - if (*(separator++) != ':') - { - ERROR("incomplete write memory binary packet received, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - } - - retval = ERROR_OK; - if (len) - { - DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); - - retval = target_write_buffer(target, addr, len, (u8*)separator); - } - - if (retval == ERROR_OK) - { - gdb_put_packet(connection, "OK", 2); - } - else - { - if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK) - return retval; - } - - return ERROR_OK; -} - -void gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size) -{ - int current = 0; - u32 address = 0x0; - - DEBUG("-"); - - if (packet_size > 1) - { - packet[packet_size] = 0; - address = strtoul(packet + 1, NULL, 16); - } - else - { - current = 1; - } - - if (packet[0] == 'c') - { - DEBUG("continue"); - target->type->resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */ - } - else if (packet[0] == 's') - { - DEBUG("step"); - target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */ - } -} - -int gdb_bp_wp_packet_error(connection_t *connection, int retval) -{ - switch (retval) |