[Bug c/11197] two function pointers to the same function are not equal

[Bug c/11197] two function pointers to the same function are not equal

[pinskia@physics.uc.edu]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11197



------- Additional Comments From pinskia@physics.uc.edu  2003-06-15 17:42 -------
I think this also effects ia64 (and maybe rs6000 (rtoc based ones)).

[Bug c/11197] two function pointers to the same function are not equal

[wilson@tuliptree.org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11197



------- Additional Comments From wilson@tuliptree.org  2003-06-16 18:29 -------
This should not be a problem for IA-64.  The ABI was specifically designed to
avoid this problem.

[Bug target/11197] two function pointers to the same function are not equal

[pinskia at physics dot uc dot edu]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11197


pinskia at physics dot uc dot edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c                           |target

[Bug target/11197] two function pointers to the same function are not equal

[pinskia at physics dot uc dot edu]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11197


pinskia at physics dot uc dot edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code

[Bug target/11197] two function pointers to the same function are not equal

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2003-11-16 03:46 -------
I really want to say this is an ABI defect but since that thread says a work around but the current 
problem is that there is no target hook for the expension of comparisions of functions pointers.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2003-11-16 03:46:55
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11197

[Bug target/11197] two function pointers to the same function are not equal

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-02-13 15:30 -------
*** Bug 14141 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jejb at steeleye dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11197

[Bug target/11197] two function pointers to the same function are not equal

[jejb at steeleye dot com]

------- Additional Comments From jejb at steeleye dot com  2004-02-13 15:42 -------
Actually, these bugs are not duplicates.

11197 is complaining that the hppa (not hppa64) ABI allows the creation of
multiple function descriptors, which then miscompare.

However, the hppa64 ABI uses OPD which does *not* allow the creation of multiple
function descriptors (and hence there can be no miscompare of pointers to
function descriptors---this is like IA64).

The bug 14141 is complaining about is that the hppa64 compiler is violating the
OPD ABI rule by creating multiple function descriptors.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11197

[Bug target/11197] two function pointers to the same function are not equal

[danglin at gcc dot gnu dot org]

------- Additional Comments From danglin at gcc dot gnu dot org  2004-06-22 03:26 -------
This is fixed in all current branches.  Function pointers are
now canonicalized for this target using a magic call into the
dynamic loader to resolve function addresses.

There is some discussion of implementing official procedure
descriptors but it is not clear at this time whether this can
be done in a compatible manner.

This is really a binutils/glibc problem.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11197