xtensa: fix access to the last pseudo register

Currently access to the last pseudo register is aliased to a1. This is
done by little snippets in the beginning of xtensa_pseudo_register_read
and xtensa_pseudo_register_write that used to do such aliasing for FP
register since bdb4c075a29dd086f0868b394b488b1c94666be6, but then
FP_ALIAS was expanded into gdbarch_num_regs (current_gdbarch) +
gdbarch_num_pseudo_regs (current_gdbarch) (one register past the last
pseudo register) in 304fe2552d6e0821e8fdb7575f8e7ba6607a076d, which
then was changed to the last pseudo register in
94a0e877111421d300d26b858bd3a0a27078d1e8.

Drop these snippets.

2015-05-29  Max Filippov  <jcmvbkbc@gmail.com>
gdb/
	* xtensa-tdep.c (xtensa_pseudo_register_read)
	(xtensa_pseudo_register_write): Don't alias last pseudo register
	to a1.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index ab10166..7090e96 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2015-05-29  Max Filippov  <jcmvbkbc@gmail.com>
+
+       * xtensa-tdep.c (xtensa_pseudo_register_read)
+       (xtensa_pseudo_register_write): Don't alias last pseudo register
+       to a1.
+
 2015-05-28  Don Breazeal  <donb@codesourcery.com>
 
        * infrun.c (follow_fork_inferior): Ensure the use of

diff --git a/gdb/xtensa-tdep.c b/gdb/xtensa-tdep.c
index a66d00a..55e7d98 100644 (file)
--- a/gdb/xtensa-tdep.c
+++ b/gdb/xtensa-tdep.c
@@ -553,10 +553,6 @@ xtensa_pseudo_register_read (struct gdbarch *gdbarch,
   DEBUGTRACE ("xtensa_pseudo_register_read (... regnum = %d (%s) ...)\n",
              regnum, xtensa_register_name (gdbarch, regnum));
 
-  if (regnum == gdbarch_num_regs (gdbarch)
-               + gdbarch_num_pseudo_regs (gdbarch) - 1)
-     regnum = gdbarch_tdep (gdbarch)->a0_base + 1;
-
   /* Read aliases a0..a15, if this is a Windowed ABI.  */
   if (gdbarch_tdep (gdbarch)->isa_use_windowed_registers
       && (regnum >= gdbarch_tdep (gdbarch)->a0_base)
@@ -653,10 +649,6 @@ xtensa_pseudo_register_write (struct gdbarch *gdbarch,
   DEBUGTRACE ("xtensa_pseudo_register_write (... regnum = %d (%s) ...)\n",
              regnum, xtensa_register_name (gdbarch, regnum));
 
-  if (regnum == gdbarch_num_regs (gdbarch)
-               + gdbarch_num_pseudo_regs (gdbarch) -1)
-     regnum = gdbarch_tdep (gdbarch)->a0_base + 1;
-
   /* Renumber register, if aliase a0..a15 on Windowed ABI.  */
   if (gdbarch_tdep (gdbarch)->isa_use_windowed_registers
       && (regnum >= gdbarch_tdep (gdbarch)->a0_base)