tcg/sparc: Zero extend address argument to ld/st helpers

The C store helper functions take the address argument as a
target_ulong type; if this is 32 bit but the host is 64 bit
then the SPARC calling convention requires that the caller
must zero extend the value. We weren't doing this, which
meant we could pass values to the caller with high bits set
and QEMU would crash if it was compiled with optimizations.
In particular, the i386 BIOS would not start.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1490871151-29029-3-git-send-email-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <rth@twiddle.net>

diff --git a/tcg/sparc/tcg-target.inc.c b/tcg/sparc/tcg-target.inc.c
index ab3403998ba87fd06cb18b11bf613c025f1f429c..3785d77f627f0602507e633d7a768cf33a1a7001 100644 (file)
--- a/tcg/sparc/tcg-target.inc.c
+++ b/tcg/sparc/tcg-target.inc.c
@@ -1144,7 +1144,7 @@ static void tcg_out_qemu_ld(TCGContext *s, TCGReg data, TCGReg addr,
         /* Skip the high-part; we'll perform the extract in the trampoline.  */
         param++;
     }
-    tcg_out_mov(s, TCG_TYPE_REG, param++, addr);
+    tcg_out_mov(s, TCG_TYPE_REG, param++, addrz);
 
     /* We use the helpers to extend SB and SW data, leaving the case
        of SL needing explicit extending below.  */
@@ -1224,7 +1224,7 @@ static void tcg_out_qemu_st(TCGContext *s, TCGReg data, TCGReg addr,
         /* Skip the high-part; we'll perform the extract in the trampoline.  */
         param++;
     }
-    tcg_out_mov(s, TCG_TYPE_REG, param++, addr);
+    tcg_out_mov(s, TCG_TYPE_REG, param++, addrz);
     if (!SPARC64 && (memop & MO_SIZE) == MO_64) {
         /* Skip the high-part; we'll perform the extract in the trampoline.  */
         param++;