[Simh] Recent build crashes on OSX

[Henry Bent]

PTE not SYS abort, ptead = 7fffe4, ptidx = FFFFE4, d_p0br = 8034DC00,
d_p1br = FF800000

Process PTE in P0 or P1 space, PC: 8002B82F (XORW3
@-7035(R8), at D0FF6436, at -70B0(R1))
sim> ex P0BR
P0BR:   8034DC00
sim> ex P1BR
P1BR:   00000000
sim> ex SBR
SBR:    00044C68

-Henry

On 18 February 2016 at 10:20, Bob Supnik <bob at supnik.org> wrote:

> Okay, it's a P1 reference. VA is 7FFFF200 to 7FFFF3FF, a perfectly
> legitimate P1 top-of-stack reference. ptidx + d_p1br yields (1)007FFFE4,
> which is NOT a system virtual address, so the abort triggers. The question
> is why d_p1br is wrong.
>
> After the simulator stops, please print out the value of these memory
> management registers:
>
> >ex P0BR, P1BR, SBR
>
> The transform between dynamic (d_) values and public values is done in
> this routine:
>
> extern void set_map_reg (void)
> {
> d_p0br = P0BR & ~03;
> d_p1br = (P1BR - 0x800000) & ~03; /* VA<30> >> 7 */
> d_sbr = (SBR - 0x1000000) & ~03; /* VA<31> >> 7 */
> d_p0lr = (P0LR << 2);
> d_p1lr = (P1LR << 2) + 0x800000;                        /* VA<30> >> 7 */
> d_slr = (SLR << 2) + 0x1000000;                         /* VA<31> >> 7 */
> return;
> }
>
> Reversing the transform yields P1BR = 0, which is wrong, wrong, wrong. It
> indicates that P1BR still has its initial value and has never been loaded.
>
> Normally, I'd debug this myself, but I don't have a Mac.
>
> /Bob Supnik
>
>
> On 2/18/2016 7:57 AM, simh-request at trailing-edge.com wrote:
>
>> Message: 6
>> Date: Thu, 18 Feb 2016 07:57:13 -0500
>> From: Henry Bent<henry.r.bent at gmail.com>
>> Cc:"simh at trailing-edge.com"  <simh at trailing-edge.com>
>> Subject: Re: [Simh] Recent build crashes on OSX
>> Message-ID:
>>         <CAEdTPBePzT5-5wWoCxSZD+32ipH_yYDj6ZpBxDViK=
>> KMKM4pWQ at mail.gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> I'll admit that this is a little over my head, but the code was easy
>> enough
>> to add:
>>
>> PTE not SYS abort, ptead = 7fffe4, ptidx = FFFFE4, d_p0br = 8034DC00,
>> d_p1br = FF800000
>>
>> -Henry
>>
>>
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