518 lines
11 KiB
C
518 lines
11 KiB
C
/* Memory attributes support, for GDB.
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Copyright 2001 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "command.h"
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#include "gdbcmd.h"
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#include "memattr.h"
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#include "target.h"
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#include "value.h"
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#include "language.h"
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#include "gdb_string.h"
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/* FIXME: While this conflicts with the enum defined in breakpoint.h,
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I used them to be consistant with how breakpoints, tracepoints, and
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displays are implemented. It doesn't lose now because breakpoint.h
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is not included. */
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enum enable
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{
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disabled,
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enabled
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};
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const struct mem_attrib default_mem_attrib =
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{
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MEM_RW, /* mode */
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MEM_WIDTH_UNSPECIFIED,
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false, /* hwbreak */
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false, /* cache */
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false /* verify */
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};
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static struct mem_region *mem_region_chain = NULL;
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static int mem_number = 0;
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static struct mem_region *
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create_mem_region (CORE_ADDR lo, CORE_ADDR hi,
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const struct mem_attrib *attrib)
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{
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struct mem_region *n, *new;
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if (lo > hi)
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{
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printf_unfiltered ("invalid memory region\n");
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return NULL;
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}
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n = mem_region_chain;
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while (n)
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{
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/* overlapping node */
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if ((lo >= n->lo && lo <= n->hi) ||
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(hi >= n->lo && hi <= n->hi))
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{
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printf_unfiltered ("overlapping memory region\n");
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return NULL;
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}
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n = n->next;
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}
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new = xmalloc (sizeof (struct mem_region));
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new->lo = lo;
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new->hi = hi;
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new->number = ++mem_number;
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new->status = enabled;
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new->attrib = *attrib;
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/* link in new node */
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new->next = mem_region_chain;
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mem_region_chain = new;
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return new;
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}
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static void
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delete_mem_region (struct mem_region *m)
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{
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xfree (m);
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}
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/*
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* Look up the memory region cooresponding to ADDR.
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*/
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struct mem_region *
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lookup_mem_region (CORE_ADDR addr)
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{
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static struct mem_region region;
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struct mem_region *m;
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CORE_ADDR lo;
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CORE_ADDR hi;
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/* First we initialize LO and HI so that they describe the entire
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memory space. As we process the memory region chain, they are
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redefined to describe the minimal region containing ADDR. LO
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and HI are used in the case where no memory region is defined
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that contains ADDR. If a memory region is disabled, it is
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treated as if it does not exist. */
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lo = (CORE_ADDR) 0;
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hi = (CORE_ADDR) ~ 0;
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for (m = mem_region_chain; m; m = m->next)
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{
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if (m->status == enabled)
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{
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if (addr >= m->lo && addr < m->hi)
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return m;
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if (addr >= m->hi && lo < m->hi)
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lo = m->hi;
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if (addr <= m->lo && hi > m->lo)
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hi = m->lo;
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}
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}
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/* Because no region was found, we must cons up one based on what
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was learned above. */
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region.lo = lo;
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region.hi = hi;
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region.attrib = default_mem_attrib;
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return ®ion;
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}
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static void
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mem_command (char *args, int from_tty)
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{
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CORE_ADDR lo, hi;
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char *tok;
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struct mem_attrib attrib;
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if (!args)
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error_no_arg ("No mem");
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tok = strtok (args, " \t");
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if (!tok)
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error ("no lo address");
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lo = parse_and_eval_address (tok);
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tok = strtok (NULL, " \t");
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if (!tok)
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error ("no hi address");
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hi = parse_and_eval_address (tok);
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attrib = default_mem_attrib;
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while ((tok = strtok (NULL, " \t")) != NULL)
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{
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if (strcmp (tok, "rw") == 0)
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attrib.mode = MEM_RW;
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else if (strcmp (tok, "ro") == 0)
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attrib.mode = MEM_RO;
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else if (strcmp (tok, "wo") == 0)
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attrib.mode = MEM_WO;
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else if (strcmp (tok, "8") == 0)
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attrib.width = MEM_WIDTH_8;
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else if (strcmp (tok, "16") == 0)
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{
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if ((lo % 2 != 0) || (hi % 2 != 0))
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error ("region bounds not 16 bit aligned");
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attrib.width = MEM_WIDTH_16;
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}
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else if (strcmp (tok, "32") == 0)
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{
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if ((lo % 4 != 0) || (hi % 4 != 0))
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error ("region bounds not 32 bit aligned");
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attrib.width = MEM_WIDTH_32;
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}
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else if (strcmp (tok, "64") == 0)
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{
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if ((lo % 8 != 0) || (hi % 8 != 0))
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error ("region bounds not 64 bit aligned");
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attrib.width = MEM_WIDTH_64;
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}
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#if 0
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else if (strcmp (tok, "hwbreak") == 0)
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attrib.hwbreak = true;
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else if (strcmp (tok, "swbreak") == 0)
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attrib.hwbreak = false;
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#endif
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else if (strcmp (tok, "cache") == 0)
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attrib.cache = true;
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else if (strcmp (tok, "nocache") == 0)
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attrib.cache = false;
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#if 0
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else if (strcmp (tok, "verify") == 0)
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attrib.verify = true;
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else if (strcmp (tok, "noverify") == 0)
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attrib.verify = false;
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#endif
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else
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error ("unknown attribute: %s", tok);
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}
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create_mem_region (lo, hi, &attrib);
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}
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static void
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mem_info_command (char *args, int from_tty)
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{
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struct mem_region *m;
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struct mem_attrib *attrib;
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if (!mem_region_chain)
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{
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printf_unfiltered ("There are no memory regions defined.\n");
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return;
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}
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printf_filtered ("Memory regions now in effect:\n");
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for (m = mem_region_chain; m; m = m->next)
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{
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printf_filtered ("%d: %c\t",
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m->number,
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m->status ? 'y' : 'n');
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printf_filtered ("%s - ",
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local_hex_string_custom ((unsigned long) m->lo, "08l"));
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printf_filtered ("%s\t",
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local_hex_string_custom ((unsigned long) m->hi, "08l"));
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/* Print a token for each attribute.
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* FIXME: Should we output a comma after each token? It may
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* make it easier for users to read, but we'd lose the ability
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* to cut-and-paste the list of attributes when defining a new
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* region. Perhaps that is not important.
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*
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* FIXME: If more attributes are added to GDB, the output may
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* become cluttered and difficult for users to read. At that
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* time, we may want to consider printing tokens only if they
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* are different from the default attribute. */
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attrib = &m->attrib;
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switch (attrib->mode)
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{
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case MEM_RW:
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printf_filtered ("rw ");
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break;
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case MEM_RO:
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printf_filtered ("ro ");
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break;
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case MEM_WO:
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printf_filtered ("wo ");
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break;
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}
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switch (attrib->width)
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{
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case MEM_WIDTH_8:
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printf_filtered ("8 ");
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break;
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case MEM_WIDTH_16:
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printf_filtered ("16 ");
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break;
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case MEM_WIDTH_32:
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printf_filtered ("32 ");
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break;
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case MEM_WIDTH_64:
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printf_filtered ("64 ");
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break;
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case MEM_WIDTH_UNSPECIFIED:
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break;
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}
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#if 0
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if (attrib->hwbreak)
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printf_filtered ("hwbreak");
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else
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printf_filtered ("swbreak");
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#endif
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if (attrib->cache)
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printf_filtered ("cache ");
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else
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printf_filtered ("nocache ");
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#if 0
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if (attrib->verify)
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printf_filtered ("verify ");
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else
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printf_filtered ("noverify ");
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#endif
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printf_filtered ("\n");
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gdb_flush (gdb_stdout);
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}
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}
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/* Enable the memory region number NUM. */
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static void
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mem_enable (int num)
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{
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struct mem_region *m;
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for (m = mem_region_chain; m; m = m->next)
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if (m->number == num)
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{
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m->status = enabled;
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return;
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}
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printf_unfiltered ("No memory region number %d.\n", num);
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}
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static void
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mem_enable_command (char *args, int from_tty)
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{
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char *p = args;
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char *p1;
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int num;
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struct mem_region *m;
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dcache_invalidate (target_dcache);
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if (p == 0)
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{
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for (m = mem_region_chain; m; m = m->next)
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m->status = enabled;
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}
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else
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while (*p)
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{
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p1 = p;
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while (*p1 >= '0' && *p1 <= '9')
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p1++;
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if (*p1 && *p1 != ' ' && *p1 != '\t')
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error ("Arguments must be memory region numbers.");
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num = atoi (p);
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mem_enable (num);
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p = p1;
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while (*p == ' ' || *p == '\t')
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p++;
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}
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}
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/* Disable the memory region number NUM. */
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static void
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mem_disable (int num)
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{
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struct mem_region *m;
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for (m = mem_region_chain; m; m = m->next)
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if (m->number == num)
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{
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m->status = disabled;
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return;
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}
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printf_unfiltered ("No memory region number %d.\n", num);
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}
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static void
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mem_disable_command (char *args, int from_tty)
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{
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char *p = args;
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char *p1;
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int num;
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struct mem_region *m;
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dcache_invalidate (target_dcache);
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if (p == 0)
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{
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for (m = mem_region_chain; m; m = m->next)
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m->status = disabled;
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}
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else
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while (*p)
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{
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p1 = p;
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while (*p1 >= '0' && *p1 <= '9')
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p1++;
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if (*p1 && *p1 != ' ' && *p1 != '\t')
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error ("Arguments must be memory region numbers.");
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num = atoi (p);
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mem_disable (num);
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p = p1;
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while (*p == ' ' || *p == '\t')
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p++;
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}
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}
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/* Clear memory region list */
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static void
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mem_clear (void)
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{
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struct mem_region *m;
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while ((m = mem_region_chain) != 0)
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{
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mem_region_chain = m->next;
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delete_mem_region (m);
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}
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}
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/* Delete the memory region number NUM. */
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static void
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mem_delete (int num)
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{
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struct mem_region *m1, *m;
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if (!mem_region_chain)
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{
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printf_unfiltered ("No memory region number %d.\n", num);
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return;
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}
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if (mem_region_chain->number == num)
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{
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m1 = mem_region_chain;
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mem_region_chain = m1->next;
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delete_mem_region (m1);
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}
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else
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for (m = mem_region_chain; m->next; m = m->next)
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{
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if (m->next->number == num)
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{
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m1 = m->next;
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m->next = m1->next;
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delete_mem_region (m1);
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break;
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}
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}
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}
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static void
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mem_delete_command (char *args, int from_tty)
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{
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char *p = args;
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char *p1;
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int num;
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dcache_invalidate (target_dcache);
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if (p == 0)
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{
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if (query ("Delete all memory regions? "))
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mem_clear ();
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dont_repeat ();
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return;
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}
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while (*p)
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{
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p1 = p;
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while (*p1 >= '0' && *p1 <= '9')
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p1++;
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if (*p1 && *p1 != ' ' && *p1 != '\t')
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error ("Arguments must be memory region numbers.");
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num = atoi (p);
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mem_delete (num);
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p = p1;
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while (*p == ' ' || *p == '\t')
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p++;
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}
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dont_repeat ();
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}
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void
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_initialize_mem ()
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{
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add_com ("mem", class_vars, mem_command,
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"Define attributes for memory region.");
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add_cmd ("mem", class_vars, mem_enable_command,
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"Enable memory region.\n\
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Arguments are the code numbers of the memory regions to enable.\n\
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Do \"info mem\" to see current list of code numbers.", &enablelist);
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add_cmd ("mem", class_vars, mem_disable_command,
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"Disable memory region.\n\
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Arguments are the code numbers of the memory regions to disable.\n\
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Do \"info mem\" to see current list of code numbers.", &disablelist);
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add_cmd ("mem", class_vars, mem_delete_command,
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"Delete memory region.\n\
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Arguments are the code numbers of the memory regions to delete.\n\
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Do \"info mem\" to see current list of code numbers.", &deletelist);
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add_info ("mem", mem_info_command,
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"Memory region attributes");
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}
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