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| author | Ladi Prosek <lprosek@redhat.com> | 2017-01-26 15:22:37 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-01-27 18:08:00 +0100 |
| commit | 6da67de6803e93cbb7e93ac3497865832f8c00ea (patch) | |
| tree | b2c3d76a34f230b34c012482cc7f7c189f5f97f3 /qemu-tech.texi | |
| parent | 777357d758d937c9dd83082c39aff9f1e53e9ba3 (diff) | |
| download | qemu-6da67de6803e93cbb7e93ac3497865832f8c00ea.zip qemu-6da67de6803e93cbb7e93ac3497865832f8c00ea.tar.gz qemu-6da67de6803e93cbb7e93ac3497865832f8c00ea.tar.bz2 | |
memory: don't sign-extend 32-bit writes
ldl_p has a signed return type so assigning it to uint64_t implicitly
sign-extends the value. This results in devices with min_access_size = 8
seeing unexpected values passed to their write handlers.
Example: guest performs a 32-bit write of 0x80000000 to an mmio region
and the handler receives 0xFFFFFFFF80000000 in its value argument.
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Message-Id: <1485440557-10384-1-git-send-email-lprosek@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'qemu-tech.texi')
0 files changed, 0 insertions, 0 deletions