/* Native-dependent code for x86 (i386 and x86-64).
- Low level functions to implement Oeprating System specific
+ Low level functions to implement Operating System specific
code to manipulate x86 debug registers.
- Copyright (C) 2009-2015 Free Software Foundation, Inc.
+ Copyright (C) 2009-2019 Free Software Foundation, Inc.
This file is part of GDB.
#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. */
-/* Add watchpoint methods to the provided target_ops.
- Targets using x86 family debug registers for watchpoints should call
- this. */
-struct target_ops;
-extern void x86_use_watchpoints (struct target_ops *);
-
/* 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'
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 */