int
main (int argc, char **argv)
{
// Since MPX is disabled all these are just NOPS.
// Some of these instructions are just random.
// Once the GCC support is merged creating real test cases will be easier.
// http://gcc.gnu.org/wiki/Intel%20MPX%20support%20in%20the%20GCC%20compiler
// This is what ld.so does in _dl_runtime_resolve to save the bnds.
asm ("bndmov %bnd0, (%rsp)");
asm ("bndmov %bnd1, 16(%rsp)");
asm ("bndmov %bnd2, 32(%rsp)");
asm ("bndmov %bnd3, 48(%rsp)");
// Create a bnd, check lower and upper...
asm ("bndmk (%rax,%rdx), %bnd0");
asm ("bndcl (%rax,%rdi,4), %bnd0");
asm ("bndcu 3(%rax,%rdi,4), %bnd0");
asm ("bndcn 3(%rax,%rdi,4), %bnd0");
// Load bnd pointer and update...
asm ("bndldx 3(%rbx,%rdx), %bnd2");
asm ("bndstx %bnd2, 3(,%r12,1)");
// "bnd" prefixed call, return and jmp...
asm ("bnd call foo\n\
bnd jmp end\n\
foo: bnd ret\n\
end: nop");
// And set the bnds back...
asm ("bndmov 48(%rsp), %bnd3");
asm ("bndmov 32(%rsp), %bnd2");
asm ("bndmov 16(%rsp), %bnd1");
asm ("bndmov (%rsp), %bnd0");
return 0;
}