kernel using gcc-5.3 fails to boot right

[Mori Hiroki]

Hi

I have question that is why don't use clang ?

I think 4k is use gcc 4.2 continue and 24k and
74k to change to clang because of FreeBSD other
arch move it.

I want use MIPS16 instruction because it make
small binary. Current build is almost 4Mbyte.
If use MIPS16 instruction we get more space
at 4M flash. But gcc 4.2 and binutil not correctsupport
. I hope clang support correct MIPS16 
instruction.

Hiroki Mori


----- Original Message -----
> From: Adrian Chadd <adrian at freebsd.org>
> To: "freebsd-mips at freebsd.org" <freebsd-mips at freebsd.org>
> Cc: 
> Date: 2016/8/15, Mon 14:21
> Subject: kernel using gcc-5.3 fails to boot right
> 
> hiya,
> 
> A freebsd-head kernel compiled with gcc-5.3 for a mips32 kernel (eg
> TL-WDR3600, mips74k) doesn't seem to work right.
> 
> eg, loading a bunch of kernel modules at startup leads to a hang in kmem_arena:
> 
> kldload: can't load random: No such file or directory
>   .. ipfw
> ipfw2 initialized, divert loadable, nat loadable, default to deny,
> logging disabled
> load: 1.79  cmd: kldload 56 [kmem arena] 8.90r 0.00u 0.03s 0% 1708k
> ...
> load: 1.67  cmd: kldload 56 [kmem arena] 19.99r 0.00u 0.03s 0% 1708k
> 
> .. however, there's definitely enough space in the arena in question:
> 
> db> show vmem 0x80593bc0
> vmem 0x80593bc0 'kmem arena'
>         quantum:        4096
>         size:   41730048
>         inuse:  1523712
>         free:   40206336
>         busy tags:      37
>         free tags:      4
>                         inuse   size            free    size
>         8192            9       73728           0       0
>         12288           4       49152           0       0
>         16384           9       147456          0       0
>         20480           1       20480           0       0
>         28672           1       28672           0       0
>         32768           1       32768           0       0
>         40960           1       40960           0       0
>         45056           1       45056           0       0
>         49152           4       196608          0       0
>         65536           1       65536           0       0
>         131072          5       823296          0       0
>         33554432        0       0               1       40206336
> 
> .. so, I'm not sure yet what's going on, but something fishy is
> definitely going on.
> 
> Any ideas?
> 
> I'd like to flip on building/running freebsd-wifi mips32/mips64 images
> 100% using external gcc toolchain, and this worked fine with the
> gcc-4.9 toolchain. :(
> 
> (On the plus side, userland seems to be okay when compiled with gcc-5.3.)
> 
> 
> 
> -adrian
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