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address range support

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Doug Evans 1998-12-05 02:19:39 +00:00
parent c8faefbe09
commit 17f07639b4
4 changed files with 389 additions and 0 deletions
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2
sim/common/.Sanitize
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@ -93,6 +93,8 @@ run.c
run.1
sim-abort.c
sim-alu.h
sim-arange.c
sim-arange.h
sim-assert.h
sim-base.h
sim-basics.h

14
sim/common/ChangeLog
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@ -1,3 +1,17 @@
1998-12-04 Doug Evans <devans@casey.cygnus.com>
* sim-arange.c: New file.
* sim-arange.h: New file.
1998-12-03 Frank Ch. Eigler <fche@cygnus.com>
* sim-memopt.c (sim_memory_uninstall): Deallocate all memory
regions.
1998-12-01 Doug Evans <devans@casey.cygnus.com>
* sim-inline.c (SIM_INLINE_P): Fix typo.
start-sanitize-gxsim
1998-12-01 Frank Ch. Eigler <fche@elastic.org>

290
sim/common/sim-arange.c Normal file
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@ -0,0 +1,290 @@
/* Address ranges.
Copyright (C) 1998 Free Software Foundation, Inc.
Contributed by Cygnus Solutions.
This file is part of the GNU Simulators.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Tell sim-arange.h it's us. */
#define SIM_ARANGE_C
#include "sim-basics.h"
#include "sim-assert.h"
#define DEFINE_INLINE_P (! defined (SIM_ARANGE_C_INCLUDED))
#define DEFINE_NON_INLINE_P defined (SIM_ARANGE_C_INCLUDED)
#if DEFINE_NON_INLINE_P
/* Insert a range. */
static void
insert_range (ADDR_SUBRANGE **pos, ADDR_SUBRANGE *asr)
{
asr->next = *pos;
*pos = asr;
}
/* Delete a range. */
static void
delete_range (ADDR_SUBRANGE **thisasrp)
{
ADDR_SUBRANGE *thisasr;
thisasr = *thisasrp;
*thisasrp = thisasr->next;
free (thisasr);
}
/* Add or delete an address range.
This code was borrowed from linux's locks.c:posix_lock_file().
??? Todo: Given our simpler needs this could be simplified
(split into two fns). */
static void
frob_range (ADDR_RANGE *ar, address_word start, address_word end, int delete_p)
{
ADDR_SUBRANGE *asr;
ADDR_SUBRANGE *new_asr, *new_asr2;
ADDR_SUBRANGE *left = NULL;
ADDR_SUBRANGE *right = NULL;
ADDR_SUBRANGE **before;
ADDR_SUBRANGE init_caller;
ADDR_SUBRANGE *caller = &init_caller;
int added_p = 0;
memset (caller, 0, sizeof (ADDR_SUBRANGE));
new_asr = ZALLOC (ADDR_SUBRANGE);
new_asr2 = ZALLOC (ADDR_SUBRANGE);
caller->start = start;
caller->end = end;
before = &ar->ranges;
while ((asr = *before) != NULL)
{
if (! delete_p)
{
/* Try next range if current range preceeds new one and not
adjacent or overlapping. */
if (asr->end < caller->start - 1)
goto next_range;
/* Break out if new range preceeds current one and not
adjacent or overlapping. */
if (asr->start > caller->end + 1)
break;
/* If we come here, the new and current ranges are adjacent or
overlapping. Make one range yielding from the lower start address
of both ranges to the higher end address. */
if (asr->start > caller->start)
asr->start = caller->start;
else
caller->start = asr->start;
if (asr->end < caller->end)
asr->end = caller->end;
else
caller->end = asr->end;
if (added_p)
{
delete_range (before);
continue;
}
caller = asr;
added_p = 1;
}
else /* deleting a range */
{
/* Try next range if current range preceeds new one. */
if (asr->end < caller->start)
goto next_range;
/* Break out if new range preceeds current one. */
if (asr->start > caller->end)
break;
added_p = 1;
if (asr->start < caller->start)
left = asr;
/* If the next range in the list has a higher end
address than the new one, insert the new one here. */
if (asr->end > caller->end)
{
right = asr;
break;
}
if (asr->start >= caller->start)
{
/* The new range completely replaces an old
one (This may happen several times). */
if (added_p)
{
delete_range (before);
continue;
}
/* Replace the old range with the new one. */
asr->start = caller->start;
asr->end = caller->end;
caller = asr;
added_p = 1;
}
}
/* Go on to next range. */
next_range:
before = &asr->next;
}
if (!added_p)
{
if (delete_p)
goto out;
new_asr->start = caller->start;
new_asr->end = caller->end;
insert_range (before, new_asr);
new_asr = NULL;
}
if (right)
{
if (left == right)
{
/* The new range breaks the old one in two pieces,
so we have to use the second new range. */
new_asr2->start = right->start;
new_asr2->end = right->end;
left = new_asr2;
insert_range (before, left);
new_asr2 = NULL;
}
right->start = caller->end + 1;
}
if (left)
{
left->end = caller->start - 1;
}
out:
if (new_asr)
free(new_asr);
if (new_asr2)
free(new_asr2);
}
/* Free T and all subtrees. */
static void
free_search_tree (ADDR_RANGE_TREE *t)
{
if (t != NULL)
{
free_search_tree (t->lower);
free_search_tree (t->higher);
free (t);
}
}
/* Subroutine of build_search_tree to recursively build a balanced tree.
??? It's not an optimum tree though. */
static ADDR_RANGE_TREE *
build_tree_1 (ADDR_SUBRANGE **asrtab, unsigned int n)
{
unsigned int mid = n / 2;
ADDR_RANGE_TREE *t;
if (n == 0)
return NULL;
t = (ADDR_RANGE_TREE *) xmalloc (sizeof (ADDR_RANGE_TREE));
t->start = asrtab[mid]->start;
t->end = asrtab[mid]->end;
if (mid != 0)
t->lower = build_tree_1 (asrtab, mid);
else
t->lower = NULL;
if (n > mid + 1)
t->higher = build_tree_1 (asrtab + mid + 1, n - mid - 1);
else
t->higher = NULL;
return t;
}
/* Build a search tree for address range AR. */
static void
build_search_tree (ADDR_RANGE *ar)
{
/* ??? Simple version for now. */
ADDR_SUBRANGE *asr,**asrtab;
unsigned int i, n;
for (n = 0, asr = ar->ranges; asr != NULL; ++n, asr = asr->next)
continue;
asrtab = (ADDR_SUBRANGE **) xmalloc (n * sizeof (ADDR_SUBRANGE *));
for (i = 0, asr = ar->ranges; i < n; ++i, asr = asr->next)
asrtab[i] = asr;
ar->range_tree = build_tree_1 (asrtab, n);
free (asrtab);
}
void
sim_addr_range_add (ADDR_RANGE *ar, address_word start, address_word end)
{
frob_range (ar, start, end, 0);
/* Rebuild the search tree. */
free_search_tree (ar->range_tree);
build_search_tree (ar);
}
void
sim_addr_range_delete (ADDR_RANGE *ar, address_word start, address_word end)
{
frob_range (ar, start, end, 1);
/* Rebuild the search tree. */
free_search_tree (ar->range_tree);
build_search_tree (ar);
}
#endif /* DEFINE_NON_INLINE_P */
#if DEFINE_INLINE_P
SIM_ARANGE_INLINE int
sim_addr_range_hit_p (ADDR_RANGE *ar, address_word addr)
{
ADDR_RANGE_TREE *t = ar->range_tree;
while (t != NULL)
{
if (addr < t->start)
t = t->lower;
else if (addr > t->end)
t = t->higher;
else
return 1;
}
return 0;
}
#endif /* DEFINE_INLINE_P */

83
sim/common/sim-arange.h Normal file
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@ -0,0 +1,83 @@
/* Address ranges.
Copyright (C) 1998 Free Software Foundation, Inc.
Contributed by Cygnus Solutions.
This file is part of the GNU Simulators.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This file is meant to be included by sim-basics.h. */
#ifndef SIM_ARANGE_H
#define SIM_ARANGE_H
/* A list of address ranges. */
typedef struct _addr_subrange {
struct _addr_subrange *next;
/* Range of addresses to be traced is [start,end]. */
address_word start,end;
} ADDR_SUBRANGE;
/* For speed, searching is done on a tree. */
typedef struct _addr_range_tree {
struct _addr_range_tree *lower;
struct _addr_range_tree *higher;
/* Range of addresses to be traced is [start,end]. */
address_word start,end;
} ADDR_RANGE_TREE;
/* The top level struct. */
typedef struct _addr_range {
ADDR_SUBRANGE *ranges;
#define ADDR_RANGE_RANGES(ar) ((ar)->ranges)
ADDR_RANGE_TREE *range_tree;
#define ADDR_RANGE_TREE(ar) ((ar)->range_tree)
} ADDR_RANGE;
/* Add address range START,END to AR. */
extern void sim_addr_range_add (ADDR_RANGE * /*ar*/,
address_word /*start*/,
address_word /*end*/);
/* Delete address range START,END from AR. */
extern void sim_addr_range_delete (ADDR_RANGE * /*ar*/,
address_word /*start*/,
address_word /*end*/);
/* Return non-zero if ADDR is in range AR, traversing the entire tree.
If no range is specified, that is defined to mean "everything". */
extern INLINE int
sim_addr_range_hit_p (ADDR_RANGE * /*ar*/, address_word /*addr*/);
#define ADDR_RANGE_HIT_P(ar, addr) \
((ar)->range_tree == NULL || sim_addr_range_hit_p ((ar), (addr)))
#ifdef HAVE_INLINE
#ifdef SIM_ARANGE_C
#define SIM_ARANGE_INLINE INLINE
#else
#define SIM_ARANGE_INLINE EXTERN_INLINE
#endif
#include "sim-arange.c"
#else
#define SIM_ARANGE_INLINE
#endif
#define SIM_ARANGE_C_INCLUDED
#endif /* SIM_ARANGE_H */