/* abstract.c -- Abstract entities, handling labels
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/* abstract.c -- Abstract entities, handling labels
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Copyright (C) 2001 Marko Mlinar, markom@opencores.org
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Copyright (C) 2001 Marko Mlinar, markom@opencores.org
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Copyright (C) 2008 Embecosm Limited
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Copyright (C) 2008 Embecosm Limited
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator.
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This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator.
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This program is free software; you can redistribute it and/or modify it
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your option)
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Software Foundation; either version 3 of the License, or (at your option)
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any later version.
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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more details.
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You should have received a copy of the GNU General Public License along
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http://www.gnu.org/licenses/>. */
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with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* This program is commented throughout in a fashion suitable for processing
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/* This program is commented throughout in a fashion suitable for processing
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with Doxygen. */
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with Doxygen. */
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/* Abstract memory and routines that go with this. I need to add all sorts of
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/* Abstract memory and routines that go with this. I need to add all sorts of
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other abstract entities. Currently we have only memory. */
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other abstract entities. Currently we have only memory. */
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/* Autoconf and/or portability configuration */
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/* Autoconf and/or portability configuration */
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#include "config.h"
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#include "config.h"
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#include "port.h"
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#include "port.h"
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/* System includes */
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/* System includes */
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#include <stdlib.h>
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#include <stdlib.h>
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/* Package includes */
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/* Package includes */
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#include "labels.h"
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#include "labels.h"
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#define LABELS_HASH_SIZE 119
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#define LABELS_HASH_SIZE 119
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/* Globally visible list of breakpoints */
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/* Globally visible list of breakpoints */
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struct breakpoint_entry *breakpoints;
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struct breakpoint_entry *breakpoints;
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/* Local list of labels (symbols) */
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/* Local list of labels (symbols) */
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static struct label_entry *label_hash[LABELS_HASH_SIZE];
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static struct label_entry *label_hash[LABELS_HASH_SIZE];
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void
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void
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init_labels ()
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init_labels ()
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{
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{
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int i;
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int i;
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for (i = 0; i < LABELS_HASH_SIZE; i++)
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for (i = 0; i < LABELS_HASH_SIZE; i++)
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label_hash[i] = NULL;
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label_hash[i] = NULL;
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}
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}
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void
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void
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add_label (oraddr_t addr, char *name)
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add_label (oraddr_t addr, char *name)
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{
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{
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struct label_entry **tmp;
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struct label_entry **tmp;
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tmp = &(label_hash[addr % LABELS_HASH_SIZE]);
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tmp = &(label_hash[addr % LABELS_HASH_SIZE]);
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for (; *tmp; tmp = &((*tmp)->next));
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for (; *tmp; tmp = &((*tmp)->next)); // Find the next NULL label entry pointer (loop while the pointer de-refernce is non-NULL)
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*tmp = malloc (sizeof (**tmp));
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*tmp = malloc (sizeof (**tmp)); // allocate space for the pointer to the hash entry pointer
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(*tmp)->name = malloc (strlen (name) + 1);
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(*tmp)->name = malloc (strlen (name) + 1); // now allocate space for the name string
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(*tmp)->addr = addr;
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(*tmp)->addr = addr;
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strcpy ((*tmp)->name, name);
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strcpy ((*tmp)->name, name);
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(*tmp)->next = NULL;
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(*tmp)->next = NULL;
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}
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}
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struct label_entry *
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struct label_entry *
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get_label (oraddr_t addr)
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get_label (oraddr_t addr)
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{
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{
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struct label_entry *tmp = label_hash[addr % LABELS_HASH_SIZE];
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struct label_entry *tmp = label_hash[addr % LABELS_HASH_SIZE];
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while (tmp)
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while (tmp)
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{
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{
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if (tmp->addr == addr)
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if (tmp->addr == addr)
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return tmp;
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return tmp;
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tmp = tmp->next;
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tmp = tmp->next;
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}
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}
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return NULL;
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return NULL;
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}
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}
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struct label_entry *
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struct label_entry *
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find_label (char *name)
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find_label (char *name)
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{
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{
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int i;
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int i;
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for (i = 0; i < LABELS_HASH_SIZE; i++)
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for (i = 0; i < LABELS_HASH_SIZE; i++)
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{
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{
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struct label_entry *tmp = label_hash[i % LABELS_HASH_SIZE];
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struct label_entry *tmp = label_hash[i % LABELS_HASH_SIZE];
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while (tmp)
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while (tmp)
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{
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{
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if (strcmp (tmp->name, name) == 0)
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if (strcmp (tmp->name, name) == 0)
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return tmp;
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return tmp;
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tmp = tmp->next;
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tmp = tmp->next;
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}
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}
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}
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}
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return NULL;
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return NULL;
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}
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}
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/* Searches mem array for a particular label and returns label's address.
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/* Searches mem array for a particular label and returns label's address.
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If label does not exist, returns 0. */
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If label does not exist, returns 0. */
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oraddr_t
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oraddr_t
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eval_label (char *name)
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eval_label (char *name)
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{
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{
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struct label_entry *le;
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struct label_entry *le;
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char *plus;
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char *plus;
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char *minus;
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char *minus;
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int positive_offset = 0;
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int positive_offset = 0;
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int negative_offset = 0;
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int negative_offset = 0;
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if ((plus = strchr (name, '+')))
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if ((plus = strchr (name, '+')))
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{
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{
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*plus = '\0';
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*plus = '\0';
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positive_offset = atoi (++plus);
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positive_offset = atoi (++plus);
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}
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}
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if ((minus = strchr (name, '-')))
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if ((minus = strchr (name, '-')))
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{
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{
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*minus = '\0';
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*minus = '\0';
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negative_offset = atoi (++minus);
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negative_offset = atoi (++minus);
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}
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}
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le = find_label (name);
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le = find_label (name);
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if (!le)
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if (!le)
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return 0;
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return 0;
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return le->addr + positive_offset - negative_offset;
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return le->addr + positive_offset - negative_offset;
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}
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}
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void
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void
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init_breakpoints ()
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init_breakpoints ()
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{
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{
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breakpoints = 0;
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breakpoints = 0;
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}
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}
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void
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void
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add_breakpoint (oraddr_t addr)
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add_breakpoint (oraddr_t addr)
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{
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{
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struct breakpoint_entry *tmp;
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struct breakpoint_entry *tmp;
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tmp = (struct breakpoint_entry *) malloc (sizeof (struct breakpoint_entry));
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tmp = (struct breakpoint_entry *) malloc (sizeof (struct breakpoint_entry));
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tmp->next = breakpoints;
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tmp->next = breakpoints;
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tmp->addr = addr;
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tmp->addr = addr;
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breakpoints = tmp;
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breakpoints = tmp;
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}
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}
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void
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void
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remove_breakpoint (oraddr_t addr)
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remove_breakpoint (oraddr_t addr)
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{
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{
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struct breakpoint_entry **tmp = &breakpoints;
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struct breakpoint_entry **tmp = &breakpoints;
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while (*tmp)
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while (*tmp)
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{
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{
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if ((*tmp)->addr == addr)
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if ((*tmp)->addr == addr)
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{
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{
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struct breakpoint_entry *t = *tmp;
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struct breakpoint_entry *t = *tmp;
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(*tmp) = t->next;
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(*tmp) = t->next;
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free (t);
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free (t);
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}
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}
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else
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else
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tmp = &((*tmp)->next);
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tmp = &((*tmp)->next);
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}
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}
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}
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}
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void
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void
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print_breakpoints ()
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print_breakpoints ()
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{
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{
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struct breakpoint_entry **tmp = &breakpoints;
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struct breakpoint_entry **tmp = &breakpoints;
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int i = 1;
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int i = 1;
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printf ("---[breakpoints]------------------\n");
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printf ("---[breakpoints]------------------\n");
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while (*tmp)
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while (*tmp)
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{
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{
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printf ("Breakpoint %i at 0x%" PRIxADDR "\n", i, (*tmp)->addr);
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printf ("Breakpoint %i at 0x%" PRIxADDR "\n", i, (*tmp)->addr);
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tmp = &((*tmp)->next);
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tmp = &((*tmp)->next);
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}
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}
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printf ("---[breakpoints end]--------------\n");
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printf ("---[breakpoints end]--------------\n");
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}
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}
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int
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int
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has_breakpoint (oraddr_t addr)
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has_breakpoint (oraddr_t addr)
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{
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{
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struct breakpoint_entry *tmp = breakpoints;
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struct breakpoint_entry *tmp = breakpoints;
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while (tmp)
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while (tmp)
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{
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{
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if (tmp->addr == addr)
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if (tmp->addr == addr)
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return 1;
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return 1;
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tmp = tmp->next;
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tmp = tmp->next;
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}
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}
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return 0;
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return 0;
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}
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}
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