[PATCH 03/22] Return X86_XSTATE_SSE_MASK instead of 0 in i386fbsd_core_read_xcr0

[Yao Qi <qiyaoltc@gmail.com>]

i386fbsd_core_read_xcr0 reads the value of xcr0 from the corefile.  If
it fails, returns 0.  This makes its caller {i386,amd64}_target_description
has to handle this special value.  IMO, i386fbsd_core_read_xcr0 should
return the default xcr0 in case of error.

gdb:

2017-08-21  Yao Qi  <yao.qi@linaro.org>

	* i386-fbsd-tdep.c (i386fbsd_core_read_xcr0): Return
	X86_XSTATE_SSE_MASK instead of 0.
---
 gdb/i386-fbsd-tdep.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gdb/i386-fbsd-tdep.c b/gdb/i386-fbsd-tdep.c
index 594b8f6..baca978 100644
--- a/gdb/i386-fbsd-tdep.c
+++ b/gdb/i386-fbsd-tdep.c
@@ -248,14 +248,14 @@ i386fbsd_core_read_xcr0 (bfd *abfd)
 	    {
 	      warning (_("Couldn't read `xcr0' bytes from "
 			 "`.reg-xstate' section in core file."));
-	      return 0;
+	      return X86_XSTATE_SSE_MASK;
 	    }
 
 	  xcr0 = bfd_get_64 (abfd, contents);
 	}
     }
   else
-    xcr0 = 0;
+    xcr0 = X86_XSTATE_SSE_MASK;
 
   return xcr0;
 }
-- 
1.9.1