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/* Native-dependent code for the i386.
Low level functions to implement Oeprating System specific
code to manipulate I386 debug registers.
Copyright (C) 2009-2014 Free Software Foundation, Inc.
This file is part of GDB.
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 3 of the License, 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, see <http://www.gnu.org/licenses/>. */
#ifndef I386_NAT_H
#define I386_NAT_H 1
#include "nat/i386-dregs.h"
/* Hardware-assisted breakpoints and watchpoints. */
/* Add watchpoint methods to the provided target_ops.
Targets using i386 family debug registers for watchpoints should call
this. */
struct target_ops;
extern void i386_use_watchpoints (struct target_ops *);
/* Support for hardware watchpoints and breakpoints using the i386
debug registers.
Each target should provide several low-level functions
regrouped into i386_dr_low_type struct below. These functions
that will be called to insert watchpoints and hardware breakpoints
into the inferior, remove them, and check their status. These
functions are:
set_control -- set the debug control (DR7)
register to a given value for all LWPs
set_addr -- put an address into one debug
register for all LWPs
get_addr -- return the address in a given debug
register of the current LWP
get_status -- return the value of the debug
status (DR6) register for current LWP
get_control -- return the value of the debug
control (DR7) register for current LWP
Additionally, the native file should set the debug_register_length
field to 4 or 8 depending on the number of bytes used for
deubg registers. */
struct i386_dr_low_type
{
void (*set_control) (unsigned long);
void (*set_addr) (int, CORE_ADDR);
CORE_ADDR (*get_addr) (int);
unsigned long (*get_status) (void);
unsigned long (*get_control) (void);
int debug_register_length;
};
extern struct i386_dr_low_type i386_dr_low;
/* Use this function to set i386_dr_low debug_register_length field
rather than setting it directly to check that the length is only
set once. It also enables the 'maint set/show show-debug-regs'
command. */
extern void i386_set_debug_register_length (int len);
/* Use this function to reset the i386-nat.c debug register state. */
extern void i386_cleanup_dregs (void);
/* Return a pointer to the local mirror of the debug registers of
process PID. */
extern struct i386_debug_reg_state *i386_debug_reg_state (pid_t pid);
/* Called whenever GDB is no longer debugging process PID. It deletes
data structures that keep track of debug register state. */
extern void i386_forget_process (pid_t pid);
#endif /* I386_NAT_H */
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