On Monday 02 July 2007, Ulrich Hecht wrote: > On Saturday 30 June 2007 04:19, Paul Brook wrote: > > > QEMU does not set the Thumb bit when reading from R15 in Thumb mode. > > > > Neither does real hardware. > > You are, unsurprisingly, right. The problem seems to be a different one. > Quoting the ARM on "pop pc": > > "In ARM architecture 5 and above, bit[0] of the loaded value determines > whether execution continues after this branch in ARM state or in Thumb > state[...] In T variants of architecture version 4, bit[0] of the loaded > value is ignored and execution continues in Thumb state[...]" > > My code is supposed to run on a 4T. I guess I'll have to implement an > ARM_FEATURE_THUMB1.
As you have found out, qemu doesn't currently emulate v4t. There are a couple of other instructions that should be disabled (blx) if you do this. Paul
