Avoid undefined behaviour from shifting left into the sign bit: hw/ide/ahci.c:551:36: runtime error: left shift of 255 by 24 places cannot be represented in type 'int'
(Unfortunately C's promotion rules mean that in the expression "some_uint8_t_variable << 24" the LHS gets promoted to signed int before shifting.) Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> --- clang's undefined sanitizer produces a lot of copies of this warning during 'make check'... hw/ide/ahci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c index 796be15..21f76ed 100644 --- a/hw/ide/ahci.c +++ b/hw/ide/ahci.c @@ -548,7 +548,7 @@ static void ahci_init_d2h(AHCIDevice *ad) ad->init_d2h_sent = true; /* We're emulating receiving the first Reg H2D Fis from the device; * Update the SIG register, but otherwise proceed as normal. */ - pr->sig = (ide_state->hcyl << 24) | + pr->sig = ((uint32_t)ide_state->hcyl << 24) | (ide_state->lcyl << 16) | (ide_state->sector << 8) | (ide_state->nsector & 0xFF); -- 1.9.1