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authorOnur Sahin <onursahin08@gmail.com>2018-04-10 13:02:24 +0100
committerPeter Maydell <peter.maydell@linaro.org>2018-04-10 13:02:24 +0100
commitc4869ca630a57f4269bb932ec7f719cef5bc79b8 (patch)
tree9873717c1546b9598a067009bd2a0cbe1e01d146 /hw/sd/bcm2835_sdhost.c
parent8720daad476fd9688b0c7e2453624c8a225c9c72 (diff)
downloadqemu-arm-c4869ca630a57f4269bb932ec7f719cef5bc79b8.tar.gz
target-arm: Check undefined opcodes for SWP in A32 decoder
Make sure we are not treating architecturally Undefined instructions as a SWP, by verifying the opcodes as per section A8.8.229 of ARMv7-A specification. Bits [21:20] must be zero for this to be a SWP or SWPB. We also choose to UNDEF for the architecturally UNPREDICTABLE case of bits [11:8] not being zero. Signed-off-by: Onur Sahin <onursahin08@gmail.com> [PMM: tweaked commit message] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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