RE: [Xen-devel] Need help figuring out why my windows pv drivers wontwork with a 32 bit dom0...

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> . Windows is padding structures differently under 32 and 64 bits.
> Strange that everything else works fine though...

I think I may be onto something with this...

32 bit Linux (using gcc and a quick .c file):
sizeof(uint8_t) = 1
sizeof(uint16_t) = 2
sizeof(uint32_t) = 4
sizeof(uint64_t) = 8
sizeof(struct blkif_request) = 108
sizeof(struct blkif_request_segment) = 8
sizeof(struct blkif_response) = 12

64 bit Linux (using gcc and a quick .c file):
sizeof(uint8_t) = 1
sizeof(uint16_t) = 2
sizeof(uint32_t) = 4
sizeof(uint64_t) = 8
sizeof(struct blkif_request) = 112
sizeof(struct blkif_request_segment) = 8
sizeof(struct blkif_response) = 16

32 bit Windows (using Microsoft DDK Compiler and debug statements in the
driver)
sizeof(uint8_t) = 1
sizeof(uint16_t) = 2
sizeof(uint32_t) = 4
sizeof(uint64_t) = 8
sizeof(struct blkif_request) = 112
sizeof(struct blkif_request_segment) = 8
sizeof(struct blkif_response) = 16

Haven't tried this test on 64 bit windows yet, but if 32 bit windows and
32 bit Linux align their structures differently, I can imagine that
problems are going to arise...

James


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel