R_ESP
sc->emu.x86.R_ESP = 0;
sc->emu.x86.R_ESP = 0;
uint32_t old_sp = emu->x86.R_ESP;
emu->x86.R_ESP += 4; /* skip ESP */
emu->x86.R_EAX = emu->x86.R_ESP;
emu->x86.R_ESP = tmp;
emu->x86.R_ESP = fetch_long_imm(emu);
return &emu->x86.R_ESP;
base = emu->x86.R_ESP;