https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38239
Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-03-14
Known to work| |4.3.2, 4.4.2, 4.5.2, 4.6.0,
| |4.7.2, 4.8.0
Assignee|unassigned at gcc dot gnu.org |ro at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|The function mcount in |[4.9, 5, 6 regression] The
|gmon.o changes register ecx |function mcount in gmon.o
| |changes register ecx
Ever confirmed|0 |1
Known to fail| |4.9.0, 5.1.0, 6.0
--- Comment #2 from Rainer Orth <ro at gcc dot gnu.org> ---
I can now reproduce this, starting with gcc 4.9.
After some digging, I found that _mcount isn't called like a regular function,
but has to take care of saving and restoring call-clobbered registers itself.
Rainer
