Am 29.02.2012 08:39 schrieb Patrick Georgi: > Am 28.02.2012 23:06, schrieb Marc Jones: >> I found this bug building tint with libpayload. libpayload is built >> with defconfig and using the same coreboot crosstools gcc. The bug >> happens in the first call to alloc() when the first header of the >> first region is installed. The header memory location is checked, >> found to be 0, and then loaded with the header. The bug is that the >> original value of the location is used after the memory was updated. >> It should have been reloaded. It is pretty easy to see in the >> disassembly below. > workaround: mark setup() __attribute__((noinline)) > > The proper fix is to clean up the various casts so the aliasing based > optimizations in gcc do the right thing.
Can't you use __attribute__((may_alias)) for the affected variables? Regards, Carl-Daniel -- http://www.hailfinger.org/ -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
