commit c7d4d98ae7057467f48c02a11ad9120021976089
author Maciej W. Rozycki <macro@codesourcery.com> Mon Nov 03 18:51:38 2014 +0000
committer Leon Alrae <leon.alrae@imgtec.com> Tue Dec 16 12:45:19 2014 +0000
tree 9a85dc1a1da5395240ebfb34ec9a3a6b9c4e4f1e
parent 800675f11742b6080e40d17b8d5f35d3a5fc5724

target-mips: Make CP1.FIR read-only here too

CP1.FIR is read-only in hardware so gdbstub must respect it.  We already
respect it for CTC1 instructions, so do it here too.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>

target-mips/gdbstub.c

diff --git a/target-mips/gdbstub.c b/target-mips/gdbstub.c
index 7e3a604..e86df0e 100644
--- a/target-mips/gdbstub.c
+++ b/target-mips/gdbstub.c
@@ -105,7 +105,7 @@
             RESTORE_ROUNDING_MODE;
             break;
         case 71:
-            env->active_fpu.fcr0 = tmp;
+            /* FIR is read-only.  Ignore writes.  */
             break;
         }
         return sizeof(target_ulong);