Abstract out getting and setting parameter register

The SETMEMBLOCK operation takes a parameter in a register,
and GETMEMBLOCK returns a result in a register. Abstract
these out into functions provided by the backend, so we
can use common code for send_register_info() and
recv_and_compare_register_info().

Signed-off-by: Peter Maydell <pmaydell@chiark.greenend.org.uk>

1 files changed, 11 insertions, 0 deletions

diff --git a/risu.h b/risu.h
index 26ed834..4f923b2 100644
--- a/risu.h
+++ b/risu.h
@@ -37,6 +37,8 @@ extern int test_fp_exc;
 /* The memory block should be this long */
 #define MEMBLOCKLEN 8192
 
+struct reginfo;
+
 /* Interface provided by CPU-specific code: */
 
 /* Send the register information from the struct ucontext down the socket.
@@ -63,4 +65,13 @@ int report_match_status(void);
  */
 void advance_pc(void *uc);
 
+/* Set the parameter register in a ucontext_t to the specified value.
+ * (32-bit targets can ignore high 32 bits.)
+ * vuc is a ucontext_t* cast to void*.
+ */
+void set_ucontext_paramreg(void *vuc, uint64_t value);
+
+/* Return the value of the parameter register from a reginfo. */
+uint64_t get_reginfo_paramreg(struct reginfo *ri);
+
 #endif /* RISU_H */