On 13 January 2017 at 17:27, Ard Biesheuvel <ard.biesheu...@linaro.org> wrote: > Hi all, > > I tracked down a boot issue I was having with running the kernel under > AArch64 system emulation to commit >
59a71b4c5b4e target-arm: Use new deposit and extract ops > It appears that ubfx is executing incorrectly: the following code > > .global _start > _start: > mov x1, #0x1124 > ubfx x2, x1, #28, #4 > > built with > > aarch64-linux-gnu-gcc -o /tmp/ubfx /tmp/ubfx.s -nostartfiles > aarch64-linux-gnu-objcopy -O binary /tmp/ubfx.bin /tmp/ubfx > > and executed with > > qemu-system-aarch64 -M virt -cpu cortex-a53 -kernel /tmp/ubfx -s -S -nographic > > produces the value 0x1124000000000 in x2 (as can be observed via GDB), > while the expected value is 0 > > Regards, > Ard.
