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/* |
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* Copyright (C) 2004-2007 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: debugger.c,v 1.27 2007/06/28 14:58:38 debug Exp $ |
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* |
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* Single-step debugger. |
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* |
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* |
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* This entire module is very much non-reentrant. :-/ TODO: Fix. |
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*/ |
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|
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#include <ctype.h> |
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#include <signal.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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|
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#include "console.h" |
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#include "cpu.h" |
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#include "device.h" |
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#include "debugger.h" |
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#include "diskimage.h" |
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#include "emul.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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#include "net.h" |
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#include "settings.h" |
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#include "timer.h" |
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#include "x11.h" |
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|
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|
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extern int extra_argc; |
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extern char **extra_argv; |
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extern struct settings *global_settings; |
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extern int quiet_mode; |
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|
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|
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/* |
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* Global debugger variables: |
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* |
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* TODO: Some of these should be moved to some other place! |
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*/ |
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|
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volatile int single_step = NOT_SINGLE_STEPPING; |
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volatile int exit_debugger; |
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int force_debugger_at_exit = 0; |
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|
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volatile int single_step_breakpoint = 0; |
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int debugger_n_steps_left_before_interaction = 0; |
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|
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int old_instruction_trace = 0; |
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int old_quiet_mode = 0; |
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int old_show_trace_tree = 0; |
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|
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|
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/* |
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* Private (global) debugger variables: |
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*/ |
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|
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static volatile int ctrl_c; |
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|
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static struct emul *debugger_emul; |
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|
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/* Currently focused CPU, machine, and emulation: */ |
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int debugger_cur_cpu; |
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int debugger_cur_machine; |
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static struct machine *debugger_machine; |
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static struct emul *debugger_emul; |
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|
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#define MAX_CMD_BUFLEN 72 |
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#define N_PREVIOUS_CMDS 150 |
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static char *last_cmd[N_PREVIOUS_CMDS]; |
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static int last_cmd_index; |
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|
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static char repeat_cmd[MAX_CMD_BUFLEN]; |
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|
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#define MAGIC_UNTOUCHED 0x98ca76c2ffcc0011ULL |
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|
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static uint64_t last_dump_addr = MAGIC_UNTOUCHED; |
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static uint64_t last_unasm_addr = MAGIC_UNTOUCHED; |
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|
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|
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/* |
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* debugger_readchar(): |
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*/ |
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char debugger_readchar(void) |
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{ |
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int ch; |
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|
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while ((ch = console_readchar(MAIN_CONSOLE)) < 0 && !exit_debugger) { |
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/* Check for X11 events: */ |
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x11_check_event(debugger_emul); |
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|
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/* Give up some CPU time: */ |
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usleep(10000); |
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} |
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return ch; |
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} |
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|
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|
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/* |
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* debugger_activate(): |
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* |
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* This is a signal handler for CTRL-C. It shouldn't be called directly, |
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* but setup code in emul.c sets the CTRL-C signal handler to use this |
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* function. |
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*/ |
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void debugger_activate(int x) |
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{ |
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ctrl_c = 1; |
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|
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if (single_step != NOT_SINGLE_STEPPING) { |
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/* Already in the debugger. Do nothing. */ |
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int i; |
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for (i=0; i<MAX_CMD_BUFLEN; i++) |
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console_makeavail(MAIN_CONSOLE, '\b'); |
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console_makeavail(MAIN_CONSOLE, ' '); |
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console_makeavail(MAIN_CONSOLE, '\n'); |
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printf("^C"); |
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fflush(stdout); |
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} else { |
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/* Enter the single step debugger. */ |
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single_step = ENTER_SINGLE_STEPPING; |
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|
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/* Discard any chars in the input queue: */ |
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while (console_charavail(MAIN_CONSOLE)) |
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console_readchar(MAIN_CONSOLE); |
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} |
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|
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/* Clear the repeat-command buffer: */ |
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repeat_cmd[0] = '\0'; |
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|
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/* Reactivate the signal handler: */ |
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signal(SIGINT, debugger_activate); |
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} |
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|
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|
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/* |
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* show_breakpoint(): |
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*/ |
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static void show_breakpoint(struct machine *m, int i) |
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{ |
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printf("%3i: 0x", i); |
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if (m->cpus[0]->is_32bit) |
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printf("%08"PRIx32, (uint32_t) m->breakpoints.addr[i]); |
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else |
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printf("%016"PRIx64, (uint64_t) m->breakpoints.addr[i]); |
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if (m->breakpoints.string[i] != NULL) |
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printf(" (%s)", m->breakpoints.string[i]); |
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printf("\n"); |
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} |
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|
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|
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/****************************************************************************/ |
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|
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|
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#include "debugger_cmds.c" |
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|
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|
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/****************************************************************************/ |
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|
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|
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/* |
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* debugger_assignment(): |
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* |
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* cmd contains something like "pc=0x80001000", or "r31=memcpy+0x40". |
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*/ |
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void debugger_assignment(struct machine *m, char *cmd) |
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{ |
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char *left, *right; |
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int res_left, res_right; |
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uint64_t tmp; |
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uint64_t old_pc = m->cpus[0]->pc; /* TODO: multiple cpus? */ |
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|
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CHECK_ALLOCATION(left = malloc(MAX_CMD_BUFLEN)); |
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strlcpy(left, cmd, MAX_CMD_BUFLEN); |
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right = strchr(left, '='); |
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if (right == NULL) { |
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fprintf(stderr, "internal error in the debugger\n"); |
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exit(1); |
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} |
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*right = '\0'; |
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|
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/* Remove trailing spaces in left: */ |
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while (strlen(left) >= 1 && left[strlen(left)-1] == ' ') |
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left[strlen(left)-1] = '\0'; |
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|
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/* Remove leading spaces in right: */ |
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right++; |
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while (*right == ' ' && *right != '\0') |
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right++; |
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|
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/* printf("left = '%s'\nright = '%s'\n", left, right); */ |
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|
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res_right = debugger_parse_expression(m, right, 0, &tmp); |
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switch (res_right) { |
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case PARSE_NOMATCH: |
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printf("No match for the right-hand side of the assignment.\n"); |
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break; |
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case PARSE_MULTIPLE: |
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printf("Multiple matches for the right-hand side of the " |
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"assignment.\n"); |
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break; |
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default: |
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res_left = debugger_parse_expression(m, left, 1, &tmp); |
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switch (res_left) { |
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case PARSE_NOMATCH: |
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printf("No match for the left-hand side of the " |
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"assignment.\n"); |
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break; |
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case PARSE_MULTIPLE: |
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printf("Multiple matches for the left-hand side " |
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"of the assignment.\n"); |
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break; |
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default: |
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debugger_cmd_print(m, left); |
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} |
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} |
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|
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/* |
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* If the PC has changed, then release any breakpoint we were |
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* currently stopped at. |
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* |
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* TODO: multiple cpus? |
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*/ |
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if (old_pc != m->cpus[0]->pc) |
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single_step_breakpoint = 0; |
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|
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free(left); |
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} |
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|
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|
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/* |
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* debugger_execute_cmd(): |
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*/ |
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void debugger_execute_cmd(char *cmd, int cmd_len) |
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{ |
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int i, n, i_match, matchlen; |
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|
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/* |
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* Is there a '=' on the command line? Then try to do an |
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* assignment. (Only if there is just one word, followed |
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* by the '=' sign. This makes it possible to use commands |
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* such as "device add name addr=xyz".) |
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*/ |
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if (strchr(cmd, '=') != NULL) { |
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/* Count the nr of words: */ |
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int nw = 0, inword = 0; |
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char *p = cmd; |
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while (*p) { |
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if (*p == '=') |
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break; |
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if (*p != ' ') { |
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if (!inword) |
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nw ++; |
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inword = 1; |
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} else |
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inword = 0; |
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p++; |
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} |
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|
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if (nw == 1) { |
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debugger_assignment(debugger_machine, cmd); |
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return; |
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} |
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} |
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|
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i = 0; |
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while (cmds[i].name != NULL) |
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cmds[i++].tmp_flag = 0; |
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|
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/* How many chars in cmd to match against: */ |
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matchlen = 0; |
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while (isalpha((int)cmd[matchlen])) |
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matchlen ++; |
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|
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/* Check for a command name match: */ |
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n = i = i_match = 0; |
| 305 |
while (cmds[i].name != NULL) { |
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if (strncasecmp(cmds[i].name, cmd, matchlen) == 0 |
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&& cmds[i].f != NULL) { |
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cmds[i].tmp_flag = 1; |
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i_match = i; |
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n++; |
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} |
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i++; |
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} |
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|
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/* No match? */ |
| 316 |
if (n == 0) { |
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printf("Unknown command '%s'. Type 'help' for help.\n", cmd); |
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return; |
| 319 |
} |
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|
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/* More than one match? */ |
| 322 |
if (n > 1) { |
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printf("Ambiguous command '%s': ", cmd); |
| 324 |
i = 0; |
| 325 |
while (cmds[i].name != NULL) { |
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if (cmds[i].tmp_flag) |
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printf(" %s", cmds[i].name); |
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i++; |
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} |
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printf("\n"); |
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return; |
| 332 |
} |
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|
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/* Exactly one match: */ |
| 335 |
if (cmds[i_match].f != NULL) { |
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char *p = cmd + matchlen; |
| 337 |
/* Remove leading whitespace from the args... */ |
| 338 |
while (*p != '\0' && *p == ' ') |
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p++; |
| 340 |
|
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/* ... and run the command: */ |
| 342 |
cmds[i_match].f(debugger_machine, p); |
| 343 |
} else |
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printf("FATAL ERROR: internal error in debugger.c:" |
| 345 |
" no handler for this command?\n"); |
| 346 |
} |
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|
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|
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/* |
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* debugger_readline(): |
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* |
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* Read a line from the terminal. |
| 353 |
*/ |
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static char *debugger_readline(void) |
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{ |
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int ch, i, j, n, i_match, reallen, cmd_len, cursor_pos; |
| 357 |
int read_from_index = last_cmd_index; |
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char *cmd = last_cmd[last_cmd_index]; |
| 359 |
|
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cmd_len = 0; cmd[0] = '\0'; |
| 361 |
printf("GXemul> "); |
| 362 |
fflush(stdout); |
| 363 |
|
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ch = '\0'; |
| 365 |
cmd_len = 0; |
| 366 |
cursor_pos = 0; |
| 367 |
|
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while (ch != '\n' && !exit_debugger) { |
| 369 |
ch = debugger_readchar(); |
| 370 |
|
| 371 |
if ((ch == '\b' || ch == 127) && cursor_pos > 0) { |
| 372 |
/* Backspace. */ |
| 373 |
cursor_pos --; |
| 374 |
cmd_len --; |
| 375 |
memmove(cmd + cursor_pos, cmd + cursor_pos + 1, |
| 376 |
cmd_len); |
| 377 |
cmd[cmd_len] = '\0'; |
| 378 |
printf("\b"); |
| 379 |
for (i=cursor_pos; i<cmd_len; i++) |
| 380 |
printf("%c", cmd[i]); |
| 381 |
printf(" \b"); |
| 382 |
for (i=cursor_pos; i<cmd_len; i++) |
| 383 |
printf("\b"); |
| 384 |
} else if (ch == 4 && cmd_len > 0 && cursor_pos < cmd_len) { |
| 385 |
/* CTRL-D: Delete. */ |
| 386 |
cmd_len --; |
| 387 |
memmove(cmd + cursor_pos, cmd + cursor_pos + 1, |
| 388 |
cmd_len); |
| 389 |
cmd[cmd_len] = '\0'; |
| 390 |
for (i=cursor_pos; i<cmd_len; i++) |
| 391 |
printf("%c", cmd[i]); |
| 392 |
printf(" \b"); |
| 393 |
for (i=cursor_pos; i<cmd_len; i++) |
| 394 |
printf("\b"); |
| 395 |
} else if (ch == 1) { |
| 396 |
/* CTRL-A: Start of line. */ |
| 397 |
while (cursor_pos > 0) { |
| 398 |
cursor_pos --; |
| 399 |
printf("\b"); |
| 400 |
} |
| 401 |
} else if (ch == 2) { |
| 402 |
/* CTRL-B: Backwards one character. */ |
| 403 |
if (cursor_pos > 0) { |
| 404 |
printf("\b"); |
| 405 |
cursor_pos --; |
| 406 |
} |
| 407 |
} else if (ch == 5) { |
| 408 |
/* CTRL-E: End of line. */ |
| 409 |
while (cursor_pos < cmd_len) { |
| 410 |
printf("%c", cmd[cursor_pos]); |
| 411 |
cursor_pos ++; |
| 412 |
} |
| 413 |
} else if (ch == 6) { |
| 414 |
/* CTRL-F: Forward one character. */ |
| 415 |
if (cursor_pos < cmd_len) { |
| 416 |
printf("%c", |
| 417 |
cmd[cursor_pos]); |
| 418 |
cursor_pos ++; |
| 419 |
} |
| 420 |
} else if (ch == 11) { |
| 421 |
/* CTRL-K: Kill to end of line. */ |
| 422 |
for (i=0; i<MAX_CMD_BUFLEN; i++) |
| 423 |
console_makeavail(MAIN_CONSOLE, 4); /* :-) */ |
| 424 |
} else if (ch == 14 || ch == 16) { |
| 425 |
/* CTRL-P: Previous line in the command history, |
| 426 |
CTRL-N: next line */ |
| 427 |
do { |
| 428 |
if (ch == 14 && |
| 429 |
read_from_index == last_cmd_index) |
| 430 |
break; |
| 431 |
if (ch == 16) |
| 432 |
i = read_from_index - 1; |
| 433 |
else |
| 434 |
i = read_from_index + 1; |
| 435 |
|
| 436 |
if (i < 0) |
| 437 |
i = N_PREVIOUS_CMDS - 1; |
| 438 |
if (i >= N_PREVIOUS_CMDS) |
| 439 |
i = 0; |
| 440 |
|
| 441 |
/* Special case: pressing 'down' |
| 442 |
to reach last_cmd_index: */ |
| 443 |
if (i == last_cmd_index) { |
| 444 |
read_from_index = i; |
| 445 |
for (i=cursor_pos; i<cmd_len; |
| 446 |
i++) |
| 447 |
printf(" "); |
| 448 |
for (i=cmd_len-1; i>=0; i--) |
| 449 |
printf("\b \b"); |
| 450 |
cmd[0] = '\0'; |
| 451 |
cmd_len = cursor_pos = 0; |
| 452 |
} else if (last_cmd[i][0] != '\0') { |
| 453 |
/* Copy from old line: */ |
| 454 |
read_from_index = i; |
| 455 |
for (i=cursor_pos; i<cmd_len; |
| 456 |
i++) |
| 457 |
printf(" "); |
| 458 |
for (i=cmd_len-1; i>=0; i--) |
| 459 |
printf("\b \b"); |
| 460 |
strlcpy(cmd, |
| 461 |
last_cmd[read_from_index], |
| 462 |
MAX_CMD_BUFLEN); |
| 463 |
cmd_len = strlen(cmd); |
| 464 |
printf("%s", cmd); |
| 465 |
cursor_pos = cmd_len; |
| 466 |
} |
| 467 |
} while (0); |
| 468 |
} else if (ch >= ' ' && cmd_len < MAX_CMD_BUFLEN-1) { |
| 469 |
/* Visible character: */ |
| 470 |
memmove(cmd + cursor_pos + 1, cmd + cursor_pos, |
| 471 |
cmd_len - cursor_pos); |
| 472 |
cmd[cursor_pos] = ch; |
| 473 |
cmd_len ++; |
| 474 |
cursor_pos ++; |
| 475 |
cmd[cmd_len] = '\0'; |
| 476 |
printf("%c", ch); |
| 477 |
for (i=cursor_pos; i<cmd_len; i++) |
| 478 |
printf("%c", cmd[i]); |
| 479 |
for (i=cursor_pos; i<cmd_len; i++) |
| 480 |
printf("\b"); |
| 481 |
} else if (ch == '\r' || ch == '\n') { |
| 482 |
ch = '\n'; |
| 483 |
printf("\n"); |
| 484 |
} else if (ch == '\t') { |
| 485 |
/* Super-simple tab-completion: */ |
| 486 |
i = 0; |
| 487 |
while (cmds[i].name != NULL) |
| 488 |
cmds[i++].tmp_flag = 0; |
| 489 |
|
| 490 |
/* Check for a (partial) command match: */ |
| 491 |
n = i = i_match = 0; |
| 492 |
while (cmds[i].name != NULL) { |
| 493 |
if (strncasecmp(cmds[i].name, cmd, |
| 494 |
cmd_len) == 0) { |
| 495 |
cmds[i].tmp_flag = 1; |
| 496 |
i_match = i; |
| 497 |
n++; |
| 498 |
} |
| 499 |
i++; |
| 500 |
} |
| 501 |
|
| 502 |
switch (n) { |
| 503 |
case 0: /* Beep. */ |
| 504 |
printf("\a"); |
| 505 |
break; |
| 506 |
case 1: /* Add the rest of the command: */ |
| 507 |
reallen = strlen(cmds[i_match].name); |
| 508 |
for (i=cmd_len; i<reallen; i++) |
| 509 |
console_makeavail(MAIN_CONSOLE, |
| 510 |
cmds[i_match].name[i]); |
| 511 |
/* ... and a space, if the command takes |
| 512 |
any arguments: */ |
| 513 |
if (cmds[i_match].args != NULL && |
| 514 |
cmds[i_match].args[0] != '\0') |
| 515 |
console_makeavail(MAIN_CONSOLE, ' '); |
| 516 |
break; |
| 517 |
default: |
| 518 |
/* Show all possible commands: */ |
| 519 |
printf("\a\n"); /* Beep. :-) */ |
| 520 |
i = 0; /* i = cmds index */ |
| 521 |
j = 0; /* j = # of cmds printed */ |
| 522 |
while (cmds[i].name != NULL) { |
| 523 |
if (cmds[i].tmp_flag) { |
| 524 |
size_t q; |
| 525 |
if (j == 0) |
| 526 |
printf(" "); |
| 527 |
printf("%s", |
| 528 |
cmds[i].name); |
| 529 |
j++; |
| 530 |
if (j != 6) |
| 531 |
for (q=0; q<13-strlen( |
| 532 |
cmds[i].name); q++) |
| 533 |
printf(" "); |
| 534 |
if (j == 6) { |
| 535 |
printf("\n"); |
| 536 |
j = 0; |
| 537 |
} |
| 538 |
} |
| 539 |
i++; |
| 540 |
} |
| 541 |
if (j != 0) |
| 542 |
printf("\n"); |
| 543 |
printf("GXemul> "); |
| 544 |
for (i=0; i<cmd_len; i++) |
| 545 |
printf("%c", cmd[i]); |
| 546 |
} |
| 547 |
} else if (ch == 27) { |
| 548 |
/* Escape codes: (cursor keys etc) */ |
| 549 |
while ((ch = console_readchar(MAIN_CONSOLE)) < 0) |
| 550 |
usleep(10000); |
| 551 |
if (ch == '[' || ch == 'O') { |
| 552 |
while ((ch = console_readchar(MAIN_CONSOLE)) |
| 553 |
< 0) |
| 554 |
usleep(10000); |
| 555 |
switch (ch) { |
| 556 |
case '2': /* 2~ = ins */ |
| 557 |
case '5': /* 5~ = pgup */ |
| 558 |
case '6': /* 6~ = pgdn */ |
| 559 |
/* TODO: Ugly hack, but might work. */ |
| 560 |
while ((ch = console_readchar( |
| 561 |
MAIN_CONSOLE)) < 0) |
| 562 |
usleep(10000); |
| 563 |
/* Do nothing for these keys. */ |
| 564 |
break; |
| 565 |
case '3': /* 3~ = delete */ |
| 566 |
/* TODO: Ugly hack, but might work. */ |
| 567 |
while ((ch = console_readchar( |
| 568 |
MAIN_CONSOLE)) < 0) |
| 569 |
usleep(10000); |
| 570 |
console_makeavail(MAIN_CONSOLE, '\b'); |
| 571 |
break; |
| 572 |
case 'A': /* Up. */ |
| 573 |
/* Up cursor ==> CTRL-P */ |
| 574 |
console_makeavail(MAIN_CONSOLE, 16); |
| 575 |
break; |
| 576 |
case 'B': /* Down. */ |
| 577 |
/* Down cursor ==> CTRL-N */ |
| 578 |
console_makeavail(MAIN_CONSOLE, 14); |
| 579 |
break; |
| 580 |
case 'C': |
| 581 |
/* Right cursor ==> CTRL-F */ |
| 582 |
console_makeavail(MAIN_CONSOLE, 6); |
| 583 |
break; |
| 584 |
case 'D': /* Left */ |
| 585 |
/* Left cursor ==> CTRL-B */ |
| 586 |
console_makeavail(MAIN_CONSOLE, 2); |
| 587 |
break; |
| 588 |
case 'F': |
| 589 |
/* End ==> CTRL-E */ |
| 590 |
console_makeavail(MAIN_CONSOLE, 5); |
| 591 |
break; |
| 592 |
case 'H': |
| 593 |
/* Home ==> CTRL-A */ |
| 594 |
console_makeavail(MAIN_CONSOLE, 1); |
| 595 |
break; |
| 596 |
} |
| 597 |
} |
| 598 |
} |
| 599 |
|
| 600 |
fflush(stdout); |
| 601 |
} |
| 602 |
|
| 603 |
if (exit_debugger) |
| 604 |
cmd[0] = '\0'; |
| 605 |
|
| 606 |
return cmd; |
| 607 |
} |
| 608 |
|
| 609 |
|
| 610 |
/* |
| 611 |
* debugger(): |
| 612 |
* |
| 613 |
* This is a loop, which reads a command from the terminal, and executes it. |
| 614 |
*/ |
| 615 |
void debugger(void) |
| 616 |
{ |
| 617 |
int i, cmd_len; |
| 618 |
char *cmd; |
| 619 |
|
| 620 |
if (debugger_n_steps_left_before_interaction > 0) { |
| 621 |
debugger_n_steps_left_before_interaction --; |
| 622 |
return; |
| 623 |
} |
| 624 |
|
| 625 |
/* |
| 626 |
* Clear all dyntrans translations, because otherwise things would |
| 627 |
* become to complex to keep in sync. |
| 628 |
*/ |
| 629 |
/* TODO: In all machines */ |
| 630 |
for (i=0; i<debugger_machine->ncpus; i++) |
| 631 |
if (debugger_machine->cpus[i]->translation_cache != NULL) { |
| 632 |
cpu_create_or_reset_tc(debugger_machine->cpus[i]); |
| 633 |
debugger_machine->cpus[i]-> |
| 634 |
invalidate_translation_caches( |
| 635 |
debugger_machine->cpus[i], 0, INVALIDATE_ALL); |
| 636 |
} |
| 637 |
|
| 638 |
/* Stop timers while interacting with the user: */ |
| 639 |
timer_stop(); |
| 640 |
|
| 641 |
exit_debugger = 0; |
| 642 |
|
| 643 |
while (!exit_debugger) { |
| 644 |
/* Read a line from the terminal: */ |
| 645 |
cmd = debugger_readline(); |
| 646 |
|
| 647 |
cmd_len = strlen(cmd); |
| 648 |
|
| 649 |
/* Remove spaces: */ |
| 650 |
while (cmd_len > 0 && cmd[0]==' ') |
| 651 |
memmove(cmd, cmd+1, cmd_len --); |
| 652 |
while (cmd_len > 0 && cmd[cmd_len-1] == ' ') |
| 653 |
cmd[(cmd_len--)-1] = '\0'; |
| 654 |
|
| 655 |
/* No command? Then try reading another line. */ |
| 656 |
if (cmd_len == 0) { |
| 657 |
/* Special case for repeated commands: */ |
| 658 |
if (repeat_cmd[0] != '\0') |
| 659 |
strlcpy(cmd, repeat_cmd, MAX_CMD_BUFLEN); |
| 660 |
else |
| 661 |
continue; |
| 662 |
} else { |
| 663 |
last_cmd_index ++; |
| 664 |
if (last_cmd_index >= N_PREVIOUS_CMDS) |
| 665 |
last_cmd_index = 0; |
| 666 |
|
| 667 |
repeat_cmd[0] = '\0'; |
| 668 |
} |
| 669 |
|
| 670 |
debugger_execute_cmd(cmd, cmd_len); |
| 671 |
|
| 672 |
/* Special hack for the "step" command: */ |
| 673 |
if (exit_debugger == -1) |
| 674 |
return; |
| 675 |
} |
| 676 |
|
| 677 |
/* Start up timers again: */ |
| 678 |
timer_start(); |
| 679 |
|
| 680 |
/* ... and reset starttime, so that nr of instructions per second |
| 681 |
can be calculated correctly: */ |
| 682 |
for (i=0; i<debugger_machine->ncpus; i++) { |
| 683 |
gettimeofday(&debugger_machine->cpus[i]->starttime, NULL); |
| 684 |
debugger_machine->cpus[i]->ninstrs_since_gettimeofday = 0; |
| 685 |
} |
| 686 |
|
| 687 |
single_step = NOT_SINGLE_STEPPING; |
| 688 |
debugger_machine->instruction_trace = old_instruction_trace; |
| 689 |
debugger_machine->show_trace_tree = old_show_trace_tree; |
| 690 |
quiet_mode = old_quiet_mode; |
| 691 |
} |
| 692 |
|
| 693 |
|
| 694 |
/* |
| 695 |
* debugger_reset(): |
| 696 |
* |
| 697 |
* This function should be called before calling debugger(), when it is |
| 698 |
* absolutely necessary that debugger() is interactive. Otherwise, it might |
| 699 |
* return without doing anything, such as when single-stepping multiple |
| 700 |
* instructions at a time. |
| 701 |
*/ |
| 702 |
void debugger_reset(void) |
| 703 |
{ |
| 704 |
debugger_n_steps_left_before_interaction = 0; |
| 705 |
} |
| 706 |
|
| 707 |
|
| 708 |
/* |
| 709 |
* debugger_init(): |
| 710 |
* |
| 711 |
* Must be called before any other debugger function is used. |
| 712 |
*/ |
| 713 |
void debugger_init(struct emul *emul) |
| 714 |
{ |
| 715 |
int i; |
| 716 |
|
| 717 |
debugger_emul = emul; |
| 718 |
|
| 719 |
if (emul->n_machines < 1) { |
| 720 |
fprintf(stderr, "\nERROR: No machines, " |
| 721 |
"cannot handle this situation yet.\n\n"); |
| 722 |
exit(1); |
| 723 |
} |
| 724 |
|
| 725 |
debugger_machine = emul->machines[0]; |
| 726 |
|
| 727 |
debugger_cur_cpu = 0; |
| 728 |
debugger_cur_machine = 0; |
| 729 |
|
| 730 |
for (i=0; i<N_PREVIOUS_CMDS; i++) { |
| 731 |
CHECK_ALLOCATION(last_cmd[i] = malloc(MAX_CMD_BUFLEN)); |
| 732 |
last_cmd[i][0] = '\0'; |
| 733 |
} |
| 734 |
|
| 735 |
last_cmd_index = 0; |
| 736 |
repeat_cmd[0] = '\0'; |
| 737 |
} |
| 738 |
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