Hey Ian, I have been executing the code all this time. But apparently it was generating segmentation fault error. I configured the compiler with --disable-libssp option to disable the stack protector. Also I modified the hard frame pointer offset in the compute_frame_layout() method. But still it is showing segmentation fault. On Thu, Apr 15, 2010 at 7:41 PM, Ian Lance Taylor <iant@xxxxxxxxxx> wrote: > Vaibhav Shrimali <vaibhav.shrimali@xxxxxxxxx> writes: > >> Thanks for all your help so far. I now think I am closer to my goal. >> In order to execute : >> XOR [EBP+4], [EBP] >> after executing : >> PUSH EBP >> >> in the prologue, I need to use : emit_insn (gen_xorsi3 (DESTREG, SRC1, SRC2)); >> So I checked and I can generate a register such that: >> rtx ebp_reg = gen_rtx_REG(Pmode, BP_REG); >> this would be a hard register. >> rtx ebp_plus = gen_rtx_PLUS(Pmode, ebp_reg, 4); >> >> so now executing :- >> >> emit_insn (gen_xorsi3 (ebp_plus, ebp_plus, ebp_reg)); >> >> I dont know if ebp_plus would be converted to [XOR+4] or not, although >> it is derived from the hard register ebp_reg. >> >> If I am wrong in this approach, please correct me. > > At some point you have to try it and see what happens. The dump files > will show you the generated RTL. > > Ian > -- Vaibhav Shrimali BTech(ICT), DA-IICT Gandhinagar
