http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53016
--- Comment #1 from Mikael Pettersson <mikpe at it dot uu.se> 2012-04-17 08:14:49 UTC --- Created attachment 27175 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27175 reduced test case Gets alignment faults with both -mthumb and -marm (+ -march=armv5te -O1) using gcc 4.4.7 and 4.5.3, but not with 4.6.3 or 4.7.0. With -marm I get alignment faults that the kernel fixes up. With -mthumb I get a fatal SIGBUS and a kernel message like the following: Alignment trap: a.out (10263) PC=0x0000834e Instr=0xc331ca31 Address=0xbea0b335 FSR 0x001 Alignment trap: not handling instruction c331ca31 at [<0000834e>] Unhandled fault: alignment exception (0x001) at 0xbea0b335 I'm not sure if that's due to a kernel bug or because I've neglected to enable some Thumb1-specific support in my kernel (I normally only run pure ARM code).
