http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12306
Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |kkojima at gcc dot gnu.org
--- Comment #3 from Oleg Endo <olegendo at gcc dot gnu.org> ---
If I understand correctly, rebuilding the GOT pointer in r12 is necessary at
function entry, since it is generally not known if r12 is a valid GOT pointer
at function entry when mixing PIC code and non-PIC code. Calling a PIC
function from a non-PIC function could result in a clobbered GOT pointer.
non_pic_func:
mov.l r12,@-r15
mov.l r11,@-r15
<do stuff and clobber r12>
<call PIC function here (r12 clobbered)>
mov.l @r15+,r11
rts
mov.l @r15+,r12
Kaz, could you please confirm or refute this?
