Mauro Prevostini <mauro.prevostini@xxxxxx> writes: > as -o qtmds.o qtmds.s -I. -I. -I. -I../../../src > qtmds.s: Assembler messages: > qtmds.s:69: Error: suffix or operands invalid for `push' Tough to say what the problem is without looking at qtmds.s. However, the problem most likely has to do with some 32-bit vs. 64-bit confusion. Either your assembler expects 64-bit code and you are passing 32-bit code, or vice-versa. Ian