Re: amd64 reboot when using acpi

blymnbaesystems.com.au (Brett Lymn) writes:

>kernel: double fault trap, code=0
>Stopped in pid 17.1 (pagedaemon) at    
netbsd:Xintr_legacy7+0x34:      movq    %r13,0x48(%rsp)
>db> 

>So, it looks like a double fault in an interrupt handler
on CPU 1.

This is on entry to the interrupt handler and at this place
the CPU has already executed a couple of store operations to
the
stack.

IDTVEC(intr_/**/name/**/num)                                
           ;
        pushq   $0                      /* dummy error code
*/          ;
        pushq   $T_ASTFLT               /* trap # for doing
ASTs */     ;
        INTRENTRY                                           
           ;

#define INTRENTRY 
        subq    $32,%rsp                ; 
        testq   $SEL_UPL,56(%rsp)       ; 
        je      98f                     ; 
        swapgs                          ; 
        movw    %gs,0(%rsp)             ; 
        movw    %fs,8(%rsp)             ; 
        movw    %es,16(%rsp)            ; 
        movw    %ds,24(%rsp)            ; 
98:     INTR_SAVE_GPRS

#define INTR_SAVE_GPRS 
        subq    $120,%rsp       ; 
        movq    %r15,TF_R15(%rsp)       ; 
        movq    %r14,TF_R14(%rsp)       ; 
        movq    %r13,TF_R13(%rsp)       ;              
<----------
        movq    %r12,TF_R12(%rsp)       ; 

Could that be a stack overflow of some kind?

-- 
-- 
                                Michael van Elst
Internet: mlelstvserpens.de
                                "A potential Snark may
lurk in every tree."