[PATCH] Bug 20928 - Decode %ccr into individual flags in sparcv9 register output

[Ivo Raisr <ivo.raisr@oracle.com>]

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Please find attached a patch which fixes PR tdep/20928.

Register %ccr on sparcv9 (called sparc64 in gdb's speak) contains 
several flags
{icc,xcc}.{cnvz}. They should be properly decoded such as %fprs, %pstate 
and %fsr is done currently.

While at it, decode also properly one-bit flags of %fsr - accrued and 
current
exception flags were mixed up.

Regression test suite was run successfully with gdb 7.11 on Solaris/sparcv9.
gdb's commands 'info registers' and 'info all-registers' show %ccr with 
correctly decoded flags.


ChangeLog entry:
2016-12-05  Ivo Raisr  <ivo.raisr@oracle.com>

     PR tdep/20928
     Decode %ccr into individual flags in sparcv9 register output.
     * sparc-tdep.h: Declare %ccr type.
     * sparc64-tdep.c: Decode %ccr. Fix %fsr decoding.



[-- Attachment #2: ccr_decoding.patch --]
[-- Type: text/x-patch, Size: 3740 bytes --]

diff -upr a/ChangeLog b/ChangeLog
--- a/ChangeLog	2016-02-24 01:55:15.000000000 +0000
+++ b/ChangeLog	2016-12-05 15:38:46.962931312 +0000
@@ -1,3 +1,10 @@
+2016-12-05  Ivo Raisr  <ivo.raisr@oracle.com>
+
+	PR tdep/20928
+	Decode %ccr into individual flags in sparcv9 register output.
+	* sparc-tdep.h: Declare %ccr type.
+	* sparc64-tdep.c: Decode %ccr. Fix %fsr decoding.
+
 2016-01-12  H.J. Lu  <hongjiu.lu@intel.com>
 
 	Sync with GCC
diff -upr a/gdb/sparc-tdep.h b/gdb/sparc-tdep.h
--- a/gdb/sparc-tdep.h	2016-02-09 19:19:39.000000000 +0000
+++ b/gdb/sparc-tdep.h	2016-12-05 15:25:55.187764842 +0000
@@ -76,6 +76,7 @@ struct gdbarch_tdep
   /* ISA-specific data types.  */
   struct type *sparc_psr_type;
   struct type *sparc_fsr_type;
+  struct type *sparc64_ccr_type;
   struct type *sparc64_pstate_type;
   struct type *sparc64_fsr_type;
   struct type *sparc64_fprs_type;
diff -upr a/gdb/sparc64-tdep.c b/gdb/sparc64-tdep.c
--- a/gdb/sparc64-tdep.c	2016-02-09 19:19:39.000000000 +0000
+++ b/gdb/sparc64-tdep.c	2016-12-05 15:26:04.242830444 +0000
@@ -172,6 +172,31 @@ sparc64_pstate_type (struct gdbarch *gdb
 }
 
 static struct type *
+sparc64_ccr_type (struct gdbarch *gdbarch)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  if (tdep->sparc64_ccr_type == NULL)
+    {
+      struct type *type;
+
+      type = arch_flags_type (gdbarch, "builtin_type_sparc64_ccr", 8);
+      append_flags_type_flag (type, 0, "icc.c");
+      append_flags_type_flag (type, 1, "icc.v");
+      append_flags_type_flag (type, 2, "icc.z");
+      append_flags_type_flag (type, 3, "icc.n");
+      append_flags_type_flag (type, 4, "xcc.c");
+      append_flags_type_flag (type, 5, "xcc.v");
+      append_flags_type_flag (type, 6, "xcc.z");
+      append_flags_type_flag (type, 7, "xcc.n");
+
+      tdep->sparc64_ccr_type = type;
+    }
+
+  return tdep->sparc64_ccr_type;
+}
+
+static struct type *
 sparc64_fsr_type (struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
@@ -181,16 +206,16 @@ sparc64_fsr_type (struct gdbarch *gdbarc
       struct type *type;
 
       type = arch_flags_type (gdbarch, "builtin_type_sparc64_fsr", 8);
-      append_flags_type_flag (type, 0, "NXA");
-      append_flags_type_flag (type, 1, "DZA");
-      append_flags_type_flag (type, 2, "UFA");
-      append_flags_type_flag (type, 3, "OFA");
-      append_flags_type_flag (type, 4, "NVA");
-      append_flags_type_flag (type, 5, "NXC");
-      append_flags_type_flag (type, 6, "DZC");
-      append_flags_type_flag (type, 7, "UFC");
-      append_flags_type_flag (type, 8, "OFC");
-      append_flags_type_flag (type, 9, "NVC");
+      append_flags_type_flag (type, 0, "NXC");
+      append_flags_type_flag (type, 1, "DZC");
+      append_flags_type_flag (type, 2, "UFC");
+      append_flags_type_flag (type, 3, "OFC");
+      append_flags_type_flag (type, 4, "NVC");
+      append_flags_type_flag (type, 5, "NXA");
+      append_flags_type_flag (type, 6, "DZA");
+      append_flags_type_flag (type, 7, "UFA");
+      append_flags_type_flag (type, 8, "OFA");
+      append_flags_type_flag (type, 9, "NVA");
       append_flags_type_flag (type, 22, "NS");
       append_flags_type_flag (type, 23, "NXM");
       append_flags_type_flag (type, 24, "DZM");
@@ -327,7 +352,7 @@ sparc64_register_type (struct gdbarch *g
   if (regnum == SPARC64_ASI_REGNUM)
     return builtin_type (gdbarch)->builtin_int64;
   if (regnum == SPARC64_CCR_REGNUM)
-    return builtin_type (gdbarch)->builtin_int64;
+    return sparc64_ccr_type (gdbarch);
   if (regnum >= SPARC64_D0_REGNUM && regnum <= SPARC64_D62_REGNUM)
     return builtin_type (gdbarch)->builtin_double;
   if (regnum >= SPARC64_Q0_REGNUM && regnum <= SPARC64_Q60_REGNUM)