commit fb6f7abcbc92506d302fb18a2c5fc853d2929248

Author: Carl Love <cel@us.ibm.com>

Date:   Tue Jun 9 10:42:03 2020 -0500

    Power PC Fix extraction of the L field for sync instruction

    The L field is currently a two bit[22:21] field in ISA 3.0. The size of the

    L field has changed over time.

    Currently the ISA 3.0 Valgrind sync instruction support code sets the

    flag_L for the instruction L field to a five bit value that includes bits

    that are marked reserved the sync instruction.  This patch fixes the issue for ISA 3.0

    to only setting flag_L the specified two bits.

    Valgrind bugzilla:   https://bugs.kde.org/show_bug.cgi?id=422677

diff --git a/VEX/priv/guest_ppc_toIR.c b/VEX/priv/guest_ppc_toIR.c

index 582c59ec0..c4965a19e 100644

--- a/VEX/priv/guest_ppc_toIR.c

+++ b/VEX/priv/guest_ppc_toIR.c

@@ -8777,7 +8777,7 @@ static Bool dis_memsync ( UInt theInstr )

    /* X-Form, XL-Form */

    UChar opc1    = ifieldOPC(theInstr);

    UInt  b11to25 = IFIELD(theInstr, 11, 15);

-   UChar flag_L  = ifieldRegDS(theInstr);

+   UChar flag_L  = IFIELD(theInstr, 21, 2);   //ISA 3.0

    UInt  b11to20 = IFIELD(theInstr, 11, 10);

    UInt  M0      = IFIELD(theInstr, 11, 5);

    UChar rD_addr = ifieldRegDS(theInstr);