buserror on osx.4

Franklin Kingma franklin at fourdigits.nl
Thu Dec 21 11:37:35 MSK 2006

On Dec 21, 2006, at 8:04 AM, Igor Sysoev wrote:

> On Tue, 19 Dec 2006, Franklin Kingma wrote:
>>> I could not reproduce the bug. I have tried on two Mac's and  
>>> POWER5 Linux.
>>> What Mac and CPU do you use ? Has the CPU 64-bit mode ?
>> My mac is a 12" powerbook G4 1,33Ghz, with 1,25GB mem, so no 64  
>> bit mode..
> Could you do following:
> echo 'int main() {}' > q.c
> cc -o q q.c
> gdb q
> b main
> run
> disassemble ___compare_and_swap32

(gdb) b main
Breakpoint 1 at 0x1dd8
(gdb) run
Starting program: /Users/franklin/q
Reading symbols for shared libraries . done

Breakpoint 1, 0x00001dd8 in main ()
(gdb) disassemble ___compare_and_swap32
Dump of assembler code for function ___compare_and_swap32:
0xffff8080 <___compare_and_swap32+0>:   lwarx   r7,0,r5
0xffff8084 <___compare_and_swap32+4>:   cmplw   r7,r3
0xffff8088 <___compare_and_swap32+8>:   bne-    0xffff809c  
0xffff808c <___compare_and_swap32+12>:  stwcx.  r4,0,r5
0xffff8090 <___compare_and_swap32+16>:  bne-    0xffff8080  
0xffff8094 <___compare_and_swap32+20>:  li      r3,1
0xffff8098 <___compare_and_swap32+24>:  blr
0xffff809c <___compare_and_swap32+28>:  li      r3,0
0xffff80a0 <___compare_and_swap32+32>:  blr
0xffff80a4 <___compare_and_swap32+36>:  .long 0x0
0xffff80a8 <___compare_and_swap32+40>:  .long 0x0
0xffff80ac <___compare_and_swap32+44>:  .long 0x0
0xffff80b0 <___compare_and_swap32+48>:  .long 0x0
0xffff80b4 <___compare_and_swap32+52>:  .long 0x0
0xffff80b8 <___compare_and_swap32+56>:  .long 0x0
0xffff80bc <___compare_and_swap32+60>:  .long 0x0
End of assembler dump.

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