Hi, I'm currently extending the Aarch64 support to enable debugging Aarch32 state as well. For a few days now I'm hunting a problem that I'm not really able to overcome.
In ARMv8 debugging, a PE can take exceptions while in debug states. For example, if you make a memory access throught the PE and it results in a MMU fault, an exception is signalled through DSCR.ERR and certain registers are overwritten, which you need to restore before you resume. This works fine in Aarch64 state. However, taking an exception in Aarch32 mode behaves differently in that immediately on resuming, the PE takes a data abort exception, i.e. it jumps to the corresponding exception vector. I have not yet found a way to prevent this behaviour and it completely upsets the program under debug. The linux kernel basically panics because the data abort is entered with the wrong mode in PSR. If someone has an idea about what's happening, that'd be awesome. BR, Matthias ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ OpenOCD-devel mailing list OpenOCD-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openocd-devel
