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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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