On Jan 7, 8:46am, [email protected] (matthew green) wrote: -- Subject: re: Unaligned access in kernel on ARMv6+ (Re: CVS commit: src/sys
| > http://netbsd.org/~kamil/kubsan/0007-boot-real-hardware.txt | | for xhci, all of these seem to be the same issue and it | appears to be a "high level allocator doesn't know what | it is allocating and does not align properly". the | problem is likely: | | #define XHCI_TRB_ALIGN 16 | struct xhci_trb { | ... | } __packed __aligned(XHCI_TRB_ALIGN); | | which is included in: | | struct xhci_softc { | ... | struct xhci_trb sc_result_trb; | | | ... how do we convey the structure alignment needed for | softc, or do we fix it by moving it into its own separate | aligned allocation? Shouldn't the compiler know how to do this right by padding around the structure that needs alignment and assuming the default alignment for the enclosing structure? christos
