Re: [Qemu-devel] [PATCH] ARM targets: added ARM_FEATURE for Thumb-exception bit in system control register

2015-09-05 Thread Mike Haben
27;t supported". Ugh - to avoid storing up a problem for the future, I think I better think it out again! best regards, Mike H. On 05/09/15 14:02, Peter Maydell wrote: On 5 September 2015 at 12:28, Mike Haben wrote: Most ARM cores switch unconditionally to ARM mode when an exception

[Qemu-devel] [PATCH] ARM targets: added ARM_FEATURE for Thumb-exception bit in system control register

2015-09-05 Thread Mike Haben
related to the version of instruction set, and some earlier cores use the same bit (30) in the control register for a completely different purpose, so seems sensible to handle it as yet another ARM feature. Signed-off-by: Mike Haben --- target-arm/cpu.c| 4 target-arm/cpu.h| 1 +

Re: [Qemu-devel] [PATCH] Added specific ARM_FEATURE for Thumb-exception enable bit

2015-09-04 Thread Mike Haben
On 03/09/15 17:58, Peter Crosthwaite wrote: Hi Mike, On Thu, Sep 3, 2015 at 2:27 AM, GitNoviceMikeH wrote: From: GitNoviceMikeH Most ARM cores switch unconditionally to ARM mode when an exception occurs; a few (Cortex) variants have a "Thumb-exception enable" bit in the system control regist