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[ARM] Why MI thunks are always implemented in ARM code?

From: "=?big5?b?RG91ZyBLd2FuICjD9q62vHcp?=" <dougkwan at google dot com>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Fri, 23 May 2008 15:26:16 -0700
Subject: [ARM] Why MI thunks are always implemented in ARM code?

I saw that MI thunks are always issued in ARM mode. Is there a
specific reason? I browse the EABI and its supplement and there is no
mentioning of how thunks are implemented.  I think I can replace a
20-byte ARM MI thunk with a 4 bytes THUMB equivalent when the thunkee
is also in THUMB mode.  Is there any problem with this?

-Doug

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