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OvmfPkg: VirtioBlkDxe: fix div & mod of 64-bit dividends on IA32/gcc-4.4 

OvmfPkg/VirtioBlkDxe/VirtioBlk.c:667: undefined reference to `__umoddi3'
OvmfPkg/VirtioBlkDxe/VirtioBlk.c:750: undefined reference to `__udivdi3'

These operations would come from libgcc in the IA32 build, but OVMF does not
link against libgcc.

Regression-tested the X64 build with Fedora 18 Alpha XFCE and Windows 8
Consumer Preview guests.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13846 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jljusten 2012-10-14 21:17:20 +00:00
parent 9de0355b1a
commit 2f03f796a4
1 changed files with 3 additions and 2 deletions
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5
OvmfPkg/VirtioBlkDxe/VirtioBlk.c
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@ -664,7 +664,7 @@ VirtioBlkInit (
goto Failed;
}
if (BlockSize == 0 || BlockSize % 512 != 0 ||
NumSectors % (BlockSize / 512) != 0) {
ModU64x32 (NumSectors, BlockSize / 512) != 0) {
//
// We can only handle a logical block consisting of whole sectors,
// and only a disk composed of whole logical blocks.
@ -747,7 +747,8 @@ VirtioBlkInit (
Dev->BlockIoMedia.WriteCaching = !!(Features & VIRTIO_BLK_F_FLUSH);
Dev->BlockIoMedia.BlockSize = BlockSize;
Dev->BlockIoMedia.IoAlign = 0;
Dev->BlockIoMedia.LastBlock = NumSectors / (BlockSize / 512) - 1;
Dev->BlockIoMedia.LastBlock = DivU64x32 (NumSectors,
BlockSize / 512) - 1;
return EFI_SUCCESS;
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