Hi Eduardo, I really appreciate your help but there is a small think that I need to ask you.
In target-i386/translate.c, there are many variants of mov i.e. case 0x89: /* mov Gv, Ev */ case 0xc7: /* mov Ev, Iv */ case 0x8b: /* mov Ev, Gv */ case 0x8e: /* mov seg, Gv */ which one do you think will be called when "mov %eax, %eax" instruction is translated. I printed the value of modrm inside the case 0x89 but the value remains the same whether I use %eax or %ebx. Secondly, How can I extract the source and destination registers from modrm. I will really appreciate your help. Thanks, Atif On 4/6/07, Eduardo Felipe <[EMAIL PROTECTED]> wrote:
Hi, Your should create a new helper function in \target-i386\helper.c to perform whatever you want QEMU to do when movl %eax,%eax is found. To invoke that function create a new opcode in \target-i386\op.c. That opcode should only call your helper function. Finally, modify \target-i386\translate.c to generate your opcode when movl %eax,%eax is translated. Look for the string 0x89, you can find out target and source registers of the move operation from variable modrm, so only %eax is considered. Regards, Eduardo
