2010-12-28 Hui Zhu <teawater@gmail.com>

	* gdbarch.sh (ax_pseudo_register_collect,
	ax_pseudo_register_push_stack): new callbacks.
	(agent_expr): Forward declare.
	* gdbarch.h, gdbarch.c: Regenerate.
	* ax-gdb.c (gen_expr): Remove pseudo-register check code.
	* ax-general.c (user-regs.h): New include.
	(ax_reg): Call gdbarch_ax_pseudo_register_push_stack.
	(ax_reg_mask): Call gdbarch_ax_pseudo_register_collect.
	* mips-tdep.c (ax.h): New include.
	(mips_ax_pseudo_register_collect,
	mips_ax_pseudo_register_push_stack): New functions.
	(mips_gdbarch_init): Set mips_ax_pseudo_register_collect and
	mips_ax_pseudo_register_push_stack.

1 files changed, 48 insertions, 0 deletions

diff --git a/gdb/mips-tdep.c b/gdb/mips-tdep.c
index e6df5f5..9b384ac 100644
--- a/gdb/mips-tdep.c
+++ b/gdb/mips-tdep.c
@@ -58,6 +58,7 @@
 #include "dwarf2-frame.h"
 #include "user-regs.h"
 #include "valprint.h"
+#include "ax.h"
 
 static const struct objfile_data *mips_pdr_data;
 
@@ -616,6 +617,48 @@ mips_pseudo_register_write (struct gdbarch *gdbarch,
     internal_error (__FILE__, __LINE__, _("bad register size"));
 }
 
+static int
+mips_ax_pseudo_register_collect (struct gdbarch *gdbarch,
+				 struct agent_expr *ax, int reg)
+{
+  int rawnum = reg % gdbarch_num_regs (gdbarch);
+  gdb_assert (reg >= gdbarch_num_regs (gdbarch)
+	      && reg < 2 * gdbarch_num_regs (gdbarch));
+
+  ax_reg_mask (ax, rawnum);
+
+  return 0;
+}
+
+static int
+mips_ax_pseudo_register_push_stack (struct gdbarch *gdbarch,
+				    struct agent_expr *ax, int reg)
+{
+  int rawnum = reg % gdbarch_num_regs (gdbarch);
+  gdb_assert (reg >= gdbarch_num_regs (gdbarch)
+	      && reg < 2 * gdbarch_num_regs (gdbarch));
+  if (register_size (gdbarch, rawnum) >= register_size (gdbarch, reg))
+    {
+      ax_reg (ax, rawnum);
+
+      if (register_size (gdbarch, rawnum) > register_size (gdbarch, reg))
+        {
+	  if (!gdbarch_tdep (gdbarch)->mips64_transfers_32bit_regs_p
+	      || gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
+	    {
+	      ax_const_l (ax, 32);
+	      ax_simple (ax, aop_lsh);
+	    }
+	  ax_const_l (ax, 32);
+	  ax_simple (ax, aop_rsh_signed);
+	}
+    }
+  else
+    internal_error (__FILE__, __LINE__, _("bad register size"));
+
+  return 0;
+}
+
 /* Table to translate MIPS16 register field to actual register number.  */
 static int mips16_to_32_reg[8] = { 16, 17, 2, 3, 4, 5, 6, 7 };
 
@@ -5933,6 +5976,11 @@ mips_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   set_gdbarch_pseudo_register_read (gdbarch, mips_pseudo_register_read);
   set_gdbarch_pseudo_register_write (gdbarch, mips_pseudo_register_write);
 
+  set_gdbarch_ax_pseudo_register_collect (gdbarch,
+					  mips_ax_pseudo_register_collect);
+  set_gdbarch_ax_pseudo_register_push_stack
+      (gdbarch, mips_ax_pseudo_register_push_stack);
+
   set_gdbarch_elf_make_msymbol_special (gdbarch,
 					mips_elf_make_msymbol_special);