------- Comment #2 from rguenth at gcc dot gnu dot org 2009-07-18 09:15 -------
asm("movw %4, %%fs\n"
"movl %%esp, %0\n"
"pushw %%fs\n"
"movl %%esp, %1\n"
"popw %%fs\n"
"movl %%esp, %2\n"
"movw %%fs, %3\n"
: "=m" (sp1), "=m" (sp2), "=m" (sp3), "=m" (fs2)
: "m" (fs1)
: "ax"
);
As you access sp2 in memory after modifying the stack pointer you get
a wrong stack slot location because sp2 lives at 12(%esp) from the
compilers view.
Either don't mess with the stack or use register input/output constraints.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40795
