[Bug tdep/26611] New: Arm: PSP thread stack unwinding not supported

[Bug tdep/26611] New: Arm: PSP thread stack unwinding not supported

[alahay01 at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26611

            Bug ID: 26611
           Summary: Arm: PSP thread stack unwinding 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 registers in a stack pointed to by
the in a PSP register.

This is currently not supported. We only support using the SP register.

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

      /* Thread (process) stack used.
         Potentially this could be other register defined by target, but PSP
         can be considered a standard name for the "Process Stack Pointer".
         To be fully aware of system registers like MSP and PSP, these could
         be added to a separate XML arm-m-system-profile that is valid for
         ARMv6-M and ARMv7-M architectures. Also to be able to debug eg a
         corefile off-line, then these registers must be defined by GDB,
         and also be included in the corefile regsets.  */

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[Bug tdep/26611] Arm: PSP thread stack unwinding not supported

[luis.machado at arm dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26611

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

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

--- 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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