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https://sourceware.org/git/binutils-gdb.git
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b1babce7c3
This function returns nullptr if debug register state does not yet exist for a given process rather than creating new state.
118 lines
4.2 KiB
C++
118 lines
4.2 KiB
C++
/* Native-dependent code for x86 (i386 and x86-64).
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Low level functions to implement Operating System specific
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code to manipulate x86 debug registers.
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Copyright (C) 2009-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef X86_NAT_H
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#define X86_NAT_H 1
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#include "breakpoint.h"
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#include "nat/x86-dregs.h"
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#include "target.h"
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/* Hardware-assisted breakpoints and watchpoints. */
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/* Use this function to set x86_dr_low debug_register_length field
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rather than setting it directly to check that the length is only
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set once. It also enables the 'maint set/show show-debug-regs'
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command. */
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extern void x86_set_debug_register_length (int len);
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/* Use this function to reset the x86-nat.c debug register state. */
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extern void x86_cleanup_dregs (void);
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/* Return the debug register state for process PID. If no existing
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state is found for this process, return nullptr. */
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struct x86_debug_reg_state *x86_lookup_debug_reg_state (pid_t pid);
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/* Called whenever GDB is no longer debugging process PID. It deletes
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data structures that keep track of debug register state. */
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extern void x86_forget_process (pid_t pid);
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/* Helper functions used by x86_nat_target below. See their
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definitions. */
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extern int x86_can_use_hw_breakpoint (enum bptype type, int cnt, int othertype);
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extern int x86_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len);
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extern int x86_stopped_by_watchpoint ();
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extern int x86_stopped_data_address (CORE_ADDR *addr_p);
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extern int x86_insert_watchpoint (CORE_ADDR addr, int len,
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enum target_hw_bp_type type,
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struct expression *cond);
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extern int x86_remove_watchpoint (CORE_ADDR addr, int len,
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enum target_hw_bp_type type,
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struct expression *cond);
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extern int x86_insert_hw_breakpoint (struct gdbarch *gdbarch,
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struct bp_target_info *bp_tgt);
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extern int x86_remove_hw_breakpoint (struct gdbarch *gdbarch,
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struct bp_target_info *bp_tgt);
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extern int x86_stopped_by_hw_breakpoint ();
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/* Convenience template mixin used to add x86 watchpoints support to a
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target. */
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template <typename BaseTarget>
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struct x86_nat_target : public BaseTarget
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{
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/* Hook in the x86 hardware watchpoints/breakpoints support. */
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int can_use_hw_breakpoint (enum bptype type, int cnt, int othertype) override
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{ return x86_can_use_hw_breakpoint (type, cnt, othertype); }
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int region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) override
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{ return x86_region_ok_for_hw_watchpoint (addr, len); }
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int insert_watchpoint (CORE_ADDR addr, int len,
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enum target_hw_bp_type type,
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struct expression *cond) override
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{ return x86_insert_watchpoint (addr, len, type, cond); }
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int remove_watchpoint (CORE_ADDR addr, int len,
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enum target_hw_bp_type type,
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struct expression *cond) override
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{ return x86_remove_watchpoint (addr, len, type, cond); }
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int insert_hw_breakpoint (struct gdbarch *gdbarch,
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struct bp_target_info *bp_tgt) override
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{ return x86_insert_hw_breakpoint (gdbarch, bp_tgt); }
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int remove_hw_breakpoint (struct gdbarch *gdbarch,
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struct bp_target_info *bp_tgt) override
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{ return x86_remove_hw_breakpoint (gdbarch, bp_tgt); }
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bool stopped_by_watchpoint () override
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{ return x86_stopped_by_watchpoint (); }
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bool stopped_data_address (CORE_ADDR *addr_p) override
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{ return x86_stopped_data_address (addr_p); }
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/* A target must provide an implementation of the
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"supports_stopped_by_hw_breakpoint" target method before this
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callback will be used. */
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bool stopped_by_hw_breakpoint () override
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{ return x86_stopped_by_hw_breakpoint (); }
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};
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#endif /* X86_NAT_H */
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