[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: GCC8 v.s. amiga
rokuyama.rk%gmail.com@localhost (Rin Okuyama) writes:
>On 2020/06/25 20:26, Michael van Elst wrote:
>> rokuyama.rk%gmail.com@localhost (Rin Okuyama) writes:
>>> kernels for sun3 and luna68k seem (almost) OK. Kernel for mac68k
>>> works if -fno-omit-frame-pointer is specified (-fomit-frame-pointer
>>> is enabled by default for optimize levels >= -O1 for GCC8).
>> Just tried a gcc8 compiled 9.99.68 kernel on an emulated 68040 Amiga.
>> No problems to see.
>Thank you very much for testing!
>Hmm, then it is problem peculiar to 68060, or GCC miscompile something
>with tuning for 68060. I observed the problem both for -m68060 and
>Which compiler flag do you use? Do you use GENERIC? Then, it is
>compiled with -m68020-60 by arch/m68k/Makefile.cmachflags...
I use a mostly stripped down GENERIC, but no change to CPU flags.
So yes, it is built with -m68020-60.
>Or emulator accepts some kinds of instructions that do not work on
I don't think so. But it doesn't emulate caches and the TLB works
Saying that, after a few hours idling in multi-user, the system
paniced with an uvm_fault followed by an illegal instruction
trap. Neither looked real in DDB.
I'll have to retry this with a gcc7-built kernel, it could be
some other m68k instability introduced in -current.
Michael van Elst
"A potential Snark may lurk in every tree."
Main Index |
Thread Index |