2c5c784255
amd64 passes first argument in RARG (BP) register which has the be preserved duing _profin() and _profout() calls. to handle this we introduce _saveret() and _savearg(). _saveret() returns AX, _savearg() returns RARG (BP). for archs other and amd64, _saveret() and _savearg() are the same function, doing nothing. restoing works with dummy function: uintptr _restore(uintptr, uintptr ret) { return ret; } ... ret = _saveret(); arg = _savearg(); ... return _restore(arg, ret); as we pass arg as the first argument, RARG (BP) is restored. |
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