> I actually use qemu as an emulator to run a program like "a.out". And the > LD_PRELOAD is for qemu not the a.out. I did what you said, but gdb gave > me the error below, If it is the a.out that you have to debug, the gdbserver embedded in qemu will allow to debug it (using "target remote" command of gdb, once ou started qemu with gdbserver)