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//==========================================================================
//
// bplist-dynamic.c
//
// Breakpoint list using dynamic memory.
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos 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.
//
// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):
// Contributors: gthomas
// Date: 1999-10-20
// Purpose: Breakpoint list using dynamic memory.
// Description:
//
//
//####DESCRIPTIONEND####
//
//=========================================================================
#include "board.h"
#ifndef USE_ECOS_HAL_BREAKPOINTS
#include <stdlib.h>
#ifndef NO_MALLOC
#ifndef NO_MALLOC_H
#include "malloc.h"
#else
void free ();
char *malloc ();
#endif
#endif
#ifdef __ECOS__
#include <cyg/hal/plf_stub.h>
#endif /* __ECOS__ */
/*
* A simple target breakpoint list using malloc.
* To use this package, you must define TRAP_SIZE to be the size
* in bytes of a trap instruction (max if there's more than one),
* and export a char array called _breakinst that contains a
* breakpoint trap. This package will copy trap instructions
* from _breakinst into the breakpoint locations.
*/
static struct breakpoint_list {
target_register_t addr;
char old_contents [TRAP_SIZE];
struct breakpoint_list *next;
char in_memory;
} *breakpoint_list = NULL;
#ifdef NO_MALLOC
static struct breakpoint_list bp_list [MAX_BP_NUM];
static struct breakpoint_list *free_bp_list = NULL;
static int curr_bp_num = 0;
#endif
#ifndef BREAKINST_DEFINED
#define BREAKINST_DEFINED
extern unsigned char _breakinst[];
#endif
int
__set_breakpoint (target_register_t addr)
{
struct breakpoint_list **addent = &breakpoint_list;
struct breakpoint_list *l = breakpoint_list;
struct breakpoint_list *newent;
while (l != NULL && l->addr < addr)
{
addent = &l->next;
l = l->next;
}
if (l != NULL && l->addr == addr)
return 2;
#ifdef NO_MALLOC
if (free_bp_list != NULL)
{
newent = free_bp_list;
free_bp_list = free_bp_list->next;
}
else
{
if (curr_bp_num < MAX_BP_NUM)
{
newent = &bp_list[curr_bp_num++];
}
else
{
return 1;
}
}
#else
newent = (struct breakpoint_list *) malloc (sizeof (struct breakpoint_list));
#endif
newent->addr = addr;
newent->in_memory = 0;
newent->next = l;
*addent = newent;
return 0;
}
int
__remove_breakpoint (target_register_t addr)
{
struct breakpoint_list *l = breakpoint_list;
struct breakpoint_list *prev = NULL;
while (l != NULL && l->addr < addr)
{
prev = l;
l = l->next;
}
if (l == NULL)
return 1;
if (l->in_memory)
{
__write_mem_safe (&l->old_contents[0],
(void*)l->addr,
sizeof (l->old_contents));
}
if (prev == NULL)
breakpoint_list = l->next;
else
prev->next = l->next;
#ifdef NO_MALLOC
l->next = free_bp_list;
free_bp_list = l;
#else
free (l);
#endif
return 0;
}
#include <cyg/hal/generic-stub.h>
#include <cyg/hal/hal_stub.h>
void
__cygmon_install_breakpoints (void)
{
struct breakpoint_list *l = breakpoint_list;
while (l != NULL)
{
if (! l->in_memory)
{
int len = sizeof (l->old_contents);
if (__read_mem_safe (&l->old_contents[0], (void*)l->addr, len) == len)
{
#ifdef WRITE_MEM_IS_MEMCPY
if (__write_mem_safe (_breakinst, (void*)l->addr, len) == (void*)l->addr)
#else
if (__write_mem_safe (_breakinst, (void*)l->addr, len) == len)
#endif
{
l->in_memory = 1;
}
}
}
l = l->next;
}
flush_i_cache ();
}
void
__cygmon_clear_breakpoints (void)
{
struct breakpoint_list *l = breakpoint_list;
while (l != NULL)
{
if (l->in_memory)
{
int len = sizeof (l->old_contents);
#ifdef WRITE_MEM_IS_MEMCPY
if (__write_mem_safe (_breakinst, (void*)l->addr, len) == (void*)l->addr)
#else
if (__write_mem_safe (&l->old_contents[0], (void*)l->addr, len) == len)
#endif
{
l->in_memory = 0;
}
}
l = l->next;
}
flush_i_cache ();
}
#endif // USE_ECOS_HAL_BREAKPOINTS
|
