create uefi/bios dual bootable images

[tsoome]

Update create_iso to add efi program.
Update usbgen to create ESP on usb image.

Note that we do have boot1.efi for now, but also be ready for UEFI32 support, so we wont fail when UEFI32 support will get integrated.

[pyhalov]

what's the point of doing this?

[tsoome]

It will create the GPT on disk. Probably should use fdisk -E instead... I think the initial idea was to re-use the partitions created by zpool, but then it appeared we have to have boot partition for ufs anyhow (need that with GPT).

[pyhalov]

My attempt doesn't work. usbgen (fmthard?) dies with 'Partition 1 not aligned on cylinder boundary: " 1 1 00 0 2048 2047".
After zpool create we have:

* /dev/rdsk/c1t2d0s2 partition map
*
* Dimensions:
*     512 bytes/sector
* 3993263 sectors
* 3993196 accessible sectors
*
* Flags:
*   1: unmountable
*  10: read-only
*
* Unallocated space:
*       First     Sector    Last
*       Sector     Count    Sector 
*          34       222       255
*
*                          First     Sector    Last
* Partition  Tag  Flags    Sector     Count    Sector  Mount Directory
       0     12    00        256     69632     69887
       1      4    00      69888   3906958   3976845
       8     11    00    3976846     16384   3993229

After fdisk -E:

* /dev/rdsk/c1t2d0s2 partition map
*
* Dimensions:
*     512 bytes/sector
*      32 sectors/track
*     128 tracks/cylinder
*    4096 sectors/cylinder
*     974 cylinders
*     972 accessible cylinders
*
* Flags:
*   1: unmountable
*  10: read-only
*
* Unallocated space:
*       First     Sector    Last
*       Sector     Count    Sector 
*        4096   3977216   3981311
*
*                          First     Sector    Last
* Partition  Tag  Flags    Sector     Count    Sector  Mount Directory
       2      5    01          0   3981312   3981311
       8      1    01          0      4096      4095

[pyhalov]

changing zpool create -B to something fdisk-baser we'll leave to time when illumos gets sane partitioning tools