gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gdb / x86-nat.h

diff --git a/gdb/x86-nat.h b/gdb/x86-nat.h
index 161695ff65fc99e22828f1e7827e8893f57ae468..7108e4d1cbed6ff692e96a9aeb3f5170446828de 100644 (file)
--- a/gdb/x86-nat.h
+++ b/gdb/x86-nat.h
@@ -1,9 +1,9 @@
 /* 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) 2009-2017 Free Software Foundation, Inc.
+   Copyright (C) 2009-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -23,16 +23,12 @@
 #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' 
@@ -49,4 +45,68 @@ extern void x86_cleanup_dregs (void);
 
 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 */