Ubuntu
libatomic-ops package

cmpxchg8b arguments backwards

Bug #148293 reported by Adam Olsen
2
Affects Status Importance Assigned to Milestone
libatomic-ops (Ubuntu)
Fix Released
Undecided
Unassigned

Bug Description

Binary package hint: libatomic-ops-dev

AO_compare_double_and_swap_double_full in sysdeps/gcc/x86.h has val1/val2 registers swapped, causing all updates to fail.

(Don't take my word for it though. Reading the x86 documentation makes my head hurt.)

Revision history for this message
Daniel T Chen (crimsun) wrote :

Is this symptom still reproducible in 8.10 RC or later?

Changed in libatomic-ops:
status: New → Incomplete
Revision history for this message
Adam Olsen (rhamph) wrote :

Although I haven't tested it, 1.2-4 does switch the registers, which should put them the correct way. 07_pic_cmpxchng.patch explicitly says it fixes this. Good enough for me.

Changed in libatomic-ops:
status: Incomplete → Fix Released
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