+/* Perform arch-dependent adjustments to a register name.
+
+ In very specific situations, it may be necessary for the register
+ name present in a SystemTap probe's argument to be handled in a
+ special way. For example, on i386, GCC may over-optimize the
+ register allocation and use smaller registers than necessary. In
+ such cases, the client that is reading and evaluating the SystemTap
+ probe (ourselves) will need to actually fetch values from the wider
+ version of the register in question.
+
+ To illustrate the example, consider the following probe argument
+ (i386):
+
+ 4@%ax
+
+ This argument says that its value can be found at the %ax register,
+ which is a 16-bit register. However, the argument's prefix says
+ that its type is "uint32_t", which is 32-bit in size. Therefore, in
+ this case, GDB should actually fetch the probe's value from register
+ %eax, not %ax. In this scenario, this function would actually
+ replace the register name from %ax to %eax.
+
+ The rationale for this can be found at PR breakpoints/24541. */
+
+extern int gdbarch_stap_adjust_register_p (struct gdbarch *gdbarch);
+
+typedef void (gdbarch_stap_adjust_register_ftype) (struct gdbarch *gdbarch, struct stap_parse_info *p, std::string ®name, int regnum);
+extern void gdbarch_stap_adjust_register (struct gdbarch *gdbarch, struct stap_parse_info *p, std::string ®name, int regnum);
+extern void set_gdbarch_stap_adjust_register (struct gdbarch *gdbarch, gdbarch_stap_adjust_register_ftype *stap_adjust_register);
+
+/* DTrace related functions.
+ The expression to compute the NARTGth+1 argument to a DTrace USDT probe.
+ NARG must be >= 0. */
+
+extern int gdbarch_dtrace_parse_probe_argument_p (struct gdbarch *gdbarch);
+
+typedef void (gdbarch_dtrace_parse_probe_argument_ftype) (struct gdbarch *gdbarch, struct expr_builder *builder, int narg);
+extern void gdbarch_dtrace_parse_probe_argument (struct gdbarch *gdbarch, struct expr_builder *builder, int narg);
+extern void set_gdbarch_dtrace_parse_probe_argument (struct gdbarch *gdbarch, gdbarch_dtrace_parse_probe_argument_ftype *dtrace_parse_probe_argument);
+
+/* True if the given ADDR does not contain the instruction sequence
+ corresponding to a disabled DTrace is-enabled probe. */
+
+extern int gdbarch_dtrace_probe_is_enabled_p (struct gdbarch *gdbarch);
+
+typedef int (gdbarch_dtrace_probe_is_enabled_ftype) (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern int gdbarch_dtrace_probe_is_enabled (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern void set_gdbarch_dtrace_probe_is_enabled (struct gdbarch *gdbarch, gdbarch_dtrace_probe_is_enabled_ftype *dtrace_probe_is_enabled);
+
+/* Enable a DTrace is-enabled probe at ADDR. */
+
+extern int gdbarch_dtrace_enable_probe_p (struct gdbarch *gdbarch);
+
+typedef void (gdbarch_dtrace_enable_probe_ftype) (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern void gdbarch_dtrace_enable_probe (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern void set_gdbarch_dtrace_enable_probe (struct gdbarch *gdbarch, gdbarch_dtrace_enable_probe_ftype *dtrace_enable_probe);
+
+/* Disable a DTrace is-enabled probe at ADDR. */
+
+extern int gdbarch_dtrace_disable_probe_p (struct gdbarch *gdbarch);
+
+typedef void (gdbarch_dtrace_disable_probe_ftype) (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern void gdbarch_dtrace_disable_probe (struct gdbarch *gdbarch, CORE_ADDR addr);
+extern void set_gdbarch_dtrace_disable_probe (struct gdbarch *gdbarch, gdbarch_dtrace_disable_probe_ftype *dtrace_disable_probe);
+