def redirect_call_assembler(self, oldlooptoken, newlooptoken):
# some minimal sanity checking
old_nbargs = oldlooptoken.compiled_loop_token._debug_nbargs
new_nbargs = newlooptoken.compiled_loop_token._debug_nbargs
assert old_nbargs == new_nbargs
oldadr = oldlooptoken._ll_function_addr
target = newlooptoken._ll_function_addr
# copy frame-info data
baseofs = self.cpu.get_baseofs_of_frame_field()
newlooptoken.compiled_loop_token.update_frame_info(
oldlooptoken.compiled_loop_token, baseofs)
# we overwrite the instructions at the old _ll_function_addr
# to start with a JMP to the new _ll_function_addr.
mc = InstrBuilder()
mc.load_imm(r.SCRATCH, target)
mc.BCR(c.ANY, r.SCRATCH)
mc.copy_to_raw_memory(oldadr)
def make_function_returning_stack_pointer(self):
mc = InstrBuilder()
mc.LGR(r.r2, r.SP)
mc.BCR(c.ANY, r.r14)
return rffi.cast(lltype.Signed, mc.get_assembler_function())