On Tue, 2013-01-08 at 19:27 -0800, Jordan Justen wrote: > Shouldn't retf in X64 pop 2 qwords?
That was my first attempt, but it didn't work. When gas sees 'retf' it emits the single opcode 0xcb, which pops 32-bit EIP and CS (0x10) from the stack as I've (now) constructed it. A retfq (0x48 0xcb) with the REX prefix would pop 64-bit values for both. But we can't have an EIP above 4GiB *anyway*, so there's not a lot of point in changing it. If we can't persuade MASM to emit the correct retf opcode, one more DB 0cbh in that file won't hurt... Hm, some ancient finger memory came back then and added a zero in front of that number in the previous sentence. That's necessary for hex numbers starting with a letter, isn't it? That'll be one more problem in my current .asm attempt...? I have ml.exe running under Wine but don't have ml64.exe to attempt doing the same... -- dwmw2
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