[Bug tdep/26612] New: Arm: Lazy stacking not supported

[Bug tdep/26612] New: Arm: Lazy stacking not supported

[alahay01 at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26612

            Bug ID: 26612
           Summary: Arm: Lazy stacking not supported
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tdep
          Assignee: unassigned at sourceware dot org
          Reporter: alahay01 at gcc dot gnu.org
  Target Milestone: ---

On cortex M, exception stack can store the FP registers using lazy stacking.

This is not currently supported.

See this comment in arm-tdep.c arm_m_exception_cache()

      /* This code does not take into account the lazy stacking, see "Lazy
         context save of FP state", in B1.5.7, also ARM AN298, supported
         by Cortex-M4F architecture.
         To fully handle this the FPCCR register (Floating-point Context
         Control Register) needs to be read out and the bits ASPEN and LSPEN
         could be checked to setup correct lazy stacked FP registers.
         This register is located at address 0xE000EF34.  */

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[Bug tdep/26612] Arm: Lazy stacking not supported

[luis.machado at arm dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26612

Luis Machado <luis.machado at arm dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |luis.machado at arm dot com
         Resolution|---                         |FIXED

--- Comment #1 from Luis Machado <luis.machado at arm dot com> ---
Addressed in gdb 12 development. Will be in gdb 13.

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