Re: aarch64 regression: gdb.cp/nextoverthrow.exp [Re: [PATCH master+7.12] [AArch64] Match instruction "STP with base register" in prologue]

[Yao Qi <qiyaoltc@gmail.com>]

Hi Jan,

On Mon, Oct 10, 2016 at 9:41 PM, Jan Kratochvil
> tbreak _Unwind_RaiseException^M
> aarch64-tdep.c:335: internal-error: CORE_ADDR aarch64_analyze_prologue(gdbarch*, CORE_ADDR, CORE_ADDR, aarch64_prologue_cache*): Assertion `inst.operands[0].type == AARCH64_OPND_Rt' failed.^M
> A problem internal to GDB has been detected,^M
> further debugging may prove unreliable.^M
> Quit this debugging session? (y or n) FAIL: gdb.cp/nextoverthrow.exp: tbreak _Unwind_RaiseException (GDB internal error)
>
> RHEL-7.3-20161007.n.0 Server aarch64
> gcc-4.8.5-11.el7.aarch64
>
> Please contact me (possibly also offlist) if you have it unreproducible.
>

This internal error is caused by instruction "stp with FP registers" in
the prologue.  The instruction triggers this assert is like
"stp d8, d9, [sp, #imm]".  However, aarch64 gdb doesn't track FP registers
at all in prologue analysis.

Could you open a ticket in bugzilla for this error?  I am testing a patch.

-- 
Yao (齐尧)