On Wed, Aug 16, 2023 at 9:42 PM Chris Johns <chr...@rtems.org> wrote:
> On 17/8/2023 6:30 am, Kinsey Moore wrote: > > The current ARM support in libdebugger does not cover Cortex-M series > > cores since it requires support for CP14 system register accessor > > instructions. Cortex-M series cores support debug monitor mode, but its > > configuration is accessed by memory mapped registers instead of using > > CP14. This omits building libdebugger from BSPs that use a cortex-m ABI > > flag. > > The ARM libdebugger has support to use memory mapped registers. It is > determined > by the ROM and then rtems_debugger_arm_debug_registers. I think the code > currently assume CP14 instructions but I think that could be made > conditional > where needed? > > Are these builds of Cortex-M processors able to support libdebugger? > > I have been rejecting changes like this unless there is a reason it cannot > be > made to work. Are there reasons it cannot be made to work? > As to my current understanding, I believe that the Cortex-M3/4/7 cores can support libdebugger via their exclusive monitor mode. I'll see if I can work around the CP14 issues instead. Kinsey
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