The patch builds a special trampoline (jit_function_t cdecl_trampoline; ) with a CDECL ABI. The trampoline gets all standard parameters at begin, but has at the end an extra pointer to a function. The trampoline uses jit_insn_call_indirect to call the function pointer with the parameters, which were passed at the begin. Because the trampoline has a CDECL ABI, jit_function_apply is then called for the trampoline. This fixes jit_function_apply to work for all different ABIs,not only the CDECL, for which jit_insn_call_indirect works too.