Testcase is extracted from Wine. /home/marcus/projects/gcc/BIN/bin/gcc -m32 -fPIC -O2 -o reg reg.i ./reg Segmentation fault (I did not try the i586 version of the compiler.)
Looking at the disassembly the stdcall function is compiled as: foo: pushl %ebp movl %esp, %ebp pushl %ebx call __i686.get_pc_thunk.bx addl $_GLOBAL_OFFSET_TABLE_, %ebx subl $4, %esp movl $0, (%esp) call [EMAIL PROTECTED] addl $4, %esp popl %ebx popl %ebp ret It does adjust the stackframe after the call to bar wrongly, either it should not do it, or just emit a "leave". -- Summary: stdcall function is miscompiled Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: marcus at jet dot franken dot de GCC build triplet: x86_64-unknown-linux-gnu GCC host triplet: x86_64-unknown-linux-gnu GCC target triplet: i586-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31628