Change Details

compat/freebsd32: add comment about 64bit int alignment sys/abi_compat.h: fix UB Do not cast and then access potentially unaligned uint64_t in the BT_CP() macro. Do the per-word copy as it is done everywhere for uint64_t. This is relevant for amd64, which 32bit host ABI (i386) only requires 4-byte alignment for uint64_t. Noted by: des

compat32: provide a type and a macro for (u)int64_t handling on non-x86 arches uint64_t is 4-byte aligned on i386, but is 8-bytes aligned on all other 32bit arches FreeBSD supports. Provide the freebsd32_uint64_t type and the FU64_CP() macro, which are intended to be used where 32bit ABI uses (u)int64_t type, and do proper layout and copying for the aggregate type. sys/abi_compat.h: fix UB for bintime32 handling Do not cast and then access potentially unaligned uint64_t in the BT_CP() macro. Use freebsd32_uint64_t type and FU64_CP() for the frac member. Noted by: des

compat32: provide a type and a macro for (u)int64_t handling on non-x86 arches compat/freebsd32: add comment about 64bit int alignmentuint64_t is 4-byte aligned on i386, but is 8-bytes aligned on all other sys/abi_compat.h: fix UB32bit arches FreeBSD supports. Provide the freebsd32_uint64_t type and Do not cast and then access potentially unaligned uint64_t in the BT_CP()the FU64_CP() macro, which are intended to be used where 32bit ABI uses macro. Do the per-word copy as it is done everywhere for uint64_t(u)int64_t type, and do proper layout and copying for the aggregate type. This is relevant for amd64, which 32bit host ABI (i386) only requiressys/abi_compat.h: fix UB for bintime32 handling 4-byte alignment for uint64_tDo not cast and then access potentially unaligned uint64_t in the BT_CP() macro. Use freebsd32_uint64_t type and FU64_CP() for the frac member. Noted by: des