risu_reginfo_arm.c: Move orphan comment to risu.h.

Move an orphan comment that describes the reginfo structure
into risu.h, and expand it a little.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 1497969886-17773-3-git-send-email-peter.maydell@linaro.org

1 files changed, 5 insertions, 0 deletions

diff --git a/risu.h b/risu.h
index 3fbeda8..70c2184 100644
--- a/risu.h
+++ b/risu.h
@@ -48,6 +48,11 @@ extern int test_fp_exc;
 /* The memory block should be this long */
 #define MEMBLOCKLEN 8192
 
+/* This is the data structure we pass over the socket for OP_COMPARE
+ * and OP_TESTEND. It is a simplified and reduced subset of what can
+ * be obtained with a ucontext_t*, and is architecture specific
+ * (defined in risu_reginfo_*.h).
+ */
 struct reginfo;
 
 /* Functions operating on reginfo */