Fix startup on MS-Windows when 'gdb.ini' is found in $HOME

[deliverable/binutils-gdb.git] / gdb / arch-utils.c

diff --git a/gdb/arch-utils.c b/gdb/arch-utils.c
index fe64627825389a985a327043c7b006dcfd65e476..c3d78024131235e7a8b6ac2fd3983852089c4203 100644 (file)
--- a/gdb/arch-utils.c
+++ b/gdb/arch-utils.c
@@ -897,6 +897,29 @@ default_addressable_memory_unit_size (struct gdbarch *gdbarch)
   return 1;
 }
 
+void
+default_guess_tracepoint_registers (struct gdbarch *gdbarch,
+                                   struct regcache *regcache,
+                                   CORE_ADDR addr)
+{
+  int pc_regno = gdbarch_pc_regnum (gdbarch);
+  gdb_byte *regs;
+
+  /* This guessing code below only works if the PC register isn't
+     a pseudo-register.  The value of a pseudo-register isn't stored
+     in the (non-readonly) regcache -- instead it's recomputed
+     (probably from some other cached raw register) whenever the
+     register is read.  In this case, a custom method implementation
+     should be used by the architecture.  */
+  if (pc_regno < 0 || pc_regno >= gdbarch_num_regs (gdbarch))
+    return;
+
+  regs = (gdb_byte *) alloca (register_size (gdbarch, pc_regno));
+  store_unsigned_integer (regs, register_size (gdbarch, pc_regno),
+                         gdbarch_byte_order (gdbarch), addr);
+  regcache_raw_supply (regcache, pc_regno, regs);
+}
+
 /* -Wmissing-prototypes */
 extern initialize_file_ftype _initialize_gdbarch_utils;