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/* Native-dependent code for x86 (i386 and x86-64).
Low level functions to implement Operating System specific
code to manipulate x86 debug registers.
Copyright (C) 2009-2022 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 X86_NAT_H
#define X86_NAT_H 1
#include "breakpoint.h"
#include "nat/x86-dregs.h"
#include "target.h"
/* Hardware-assisted breakpoints and watchpoints. */
/* Use this function to set x86_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 x86_set_debug_register_length (int len);
/* Use this function to reset the x86-nat.c debug register state. */
extern void x86_cleanup_dregs (void);
/* Return the debug register state for process PID. If no existing
state is found for this process, return nullptr. */
struct x86_debug_reg_state *x86_lookup_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 x86_forget_process (pid_t pid);
/* Helper functions used by x86_nat_target below. See their
definitions. */
extern int x86_can_use_hw_breakpoint (enum bptype type, int cnt, int othertype);
extern int x86_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len);
extern int x86_stopped_by_watchpoint ();
extern int x86_stopped_data_address (CORE_ADDR *addr_p);
extern int x86_insert_watchpoint (CORE_ADDR addr, int len,
enum target_hw_bp_type type,
struct expression *cond);
extern int x86_remove_watchpoint (CORE_ADDR addr, int len,
enum target_hw_bp_type type,
struct expression *cond);
extern int x86_insert_hw_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt);
extern int x86_remove_hw_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt);
extern int x86_stopped_by_hw_breakpoint ();
/* Convenience template mixin used to add x86 watchpoints support to a
target. */
template <typename BaseTarget>
struct x86_nat_target : public BaseTarget
{
/* Hook in the x86 hardware watchpoints/breakpoints support. */
int can_use_hw_breakpoint (enum bptype type, int cnt, int othertype) override
{ return x86_can_use_hw_breakpoint (type, cnt, othertype); }
int region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) override
{ return x86_region_ok_for_hw_watchpoint (addr, len); }
int insert_watchpoint (CORE_ADDR addr, int len,
enum target_hw_bp_type type,
struct expression *cond) override
{ return x86_insert_watchpoint (addr, len, type, cond); }
int remove_watchpoint (CORE_ADDR addr, int len,
enum target_hw_bp_type type,
struct expression *cond) override
{ return x86_remove_watchpoint (addr, len, type, cond); }
int insert_hw_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt) override
{ return x86_insert_hw_breakpoint (gdbarch, bp_tgt); }
int remove_hw_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt) override
{ return x86_remove_hw_breakpoint (gdbarch, bp_tgt); }
bool stopped_by_watchpoint () override
{ return x86_stopped_by_watchpoint (); }
bool stopped_data_address (CORE_ADDR *addr_p) override
{ return x86_stopped_data_address (addr_p); }
/* A target must provide an implementation of the
"supports_stopped_by_hw_breakpoint" target method before this
callback will be used. */
bool stopped_by_hw_breakpoint () override
{ return x86_stopped_by_hw_breakpoint (); }
};
#endif /* X86_NAT_H */
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