Re: Building current...

[Johnny Billquist <bqt%update.uu.se@localhost>]

On 2015-12-02 19:52, Christos Zoulas wrote:
> On Dec 2,  7:39pm, bqt%update.uu.se@localhost (Johnny Billquist) wrote:
> -- Subject: Re: Building current...
>
> | I'm really rusty on gdb. How do I do that?
>
> "disassemble"? With the pc address (info reg)? I think it defaults to
> that.

Actually, just disassemble will do it, as it picks the surroundings of 
the PC...

(gdb) disass
Dump of assembler code for function htab_find_slot_with_hash:
   0x004455a4 <+2>:     subl2 $0x8,sp
   0x004455a7 <+5>:     movl 0x4(ap),r7
   0x004455ab <+9>:     movl 0xc(ap),r10
   0x004455af <+13>:    movl 0x10(r7),r9
   0x004455b3 <+17>:    cmpl 0x10(ap),$0x1
   0x004455b7 <+21>:    bneq 0x4455dc <htab_find_slot_with_hash+58>
   0x004455b9 <+23>:    addl3 r9,r9,r1
   0x004455bd <+27>:    addl2 r9,r1
   0x004455c0 <+30>:    ashl $0x2,0x14(r7),r0
   0x004455c5 <+35>:    cmpl r1,r0
   0x004455c8 <+38>:    bgtru 0x4455dc <htab_find_slot_with_hash+58>
   0x004455ca <+40>:    pushl r7
   0x004455cc <+42>:    calls $0x1,0x444fca
   0x004455d1 <+47>:    tstl r0
   0x004455d3 <+49>:    bneq 0x4455d8 <htab_find_slot_with_hash+54>
   0x004455d5 <+51>:    brw 0x445721 <htab_find_slot_with_hash+383>
   0x004455d8 <+54>:    movl 0x10(r7),r9
   0x004455dc <+58>:    ashl $0x4,0x38(r7),r3
   0x004455e1 <+63>:    movab 0x527a3c[r3],r2
   0x004455e9 <+71>:    movl 0x4(r2),r0
=> 0x004455ed <+75>:    extzv $0x1f,$0x1,r10,0xfffffff8(fp)
   0x004455f3 <+81>:    mull3 0xfffffff8(fp),r0,r1
---Type <return> to continue, or q <return> to quit---
   0x004455f8 <+86>:    rotl $0x1,r0,r4
   0x004455fc <+90>:    bicl2 $0xfffffffe,r4
   0x00445603 <+97>:    mull2 r10,r4
   0x00445606 <+100>:   addl2 r1,r4
   0x00445609 <+103>:   emul r10,r0,$0x0,r0
   0x0044560e <+108>:   addl3 r4,r1,r0
   0x00445612 <+112>:   subl3 r0,r10,r6
   0x00445616 <+116>:   rotl $0x1f,r6,r6

Hmm, I can't see what's wrong. extzv with those arguments should be ok 
according to VARM. But maybe I'm confused...?

	Johnny

--
Johnny Billquist                  || "I'm on a bus
                                  ||  on a psychedelic trip
email: bqt%softjar.se@localhost             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol