On Tue, Jul 23, 2013 at 12:49 PM, H.J. Lu <hjl.to...@gmail.com> wrote: > > http://software.intel.com/sites/default/files/319433-015.pdf > > introduces 4 bound registers, which will be used for parameter passing > in x86-64. Bound registers are cleared by branch instructions. Branch > instructions with BND prefix will keep bound register contents.
I took a very quick look at the doc. Why shouldn't we run the kernel with BNDPRESERVE = 1, to avoid this behaviour of clearing the bound registers on branch instructions? That would let us avoid these issues. > I prefer the note section solution. Any suggestions, comments? I concur, but why not use the ELF attributes support rather than a new note section? Ian
