* Zachary Amsden (zach@xxxxxxxxxx) wrote: > >+ DEFINE(VSYSCALL_BASE, (PAGE_OFFSET - 2*PAGE_SIZE)); > > Ok, I'm confused. What fixed math? Sorry, bad choice of words. From above, the VYSYCALL_BASE is known at compile time (in asm-offsets.h). So the SYSENTER_RETURN is still fixed addr. For execshield it's truly dynamic, so you get something like this instead of the constant SYSENTER_RETURN: - pushl $SYSENTER_RETURN + pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp) thanks, -chris
