linux-kernel - 回复： Re: 回复： Re: 回复： Re: 回复： Status of 'unicore32' architecture in Linux kernel

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Date:	Fri, 5 Sep 2014 14:13:00 +0800 (CST)
From:	Xuetao Guan  <gxt@....edu.cn>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	linux-kernel@...r.kernel.org, Guan Xuetao <gxt@...c.pku.edu.cn>,
	Chen Gang <gang.chen.5i5j@...il.com>,
	Grant Likely <grant.likely@...aro.org>
Subject: 回复： Re: 回复： Re: 回复： Re: 回复： Status of 'unicore32' architecture in Linux kernel


----- Guenter Roeck <linux@...ck-us.net> 写道：
> On 09/03/2014 01:32 AM, Xuetao Guan  wrote:
> >
> [ ... ]
> 
> >> Please try the following patch. That seems to do it.
> >> I am sure it can be improved, but it is a start.
> >>
> >> Thanks,
> >> Guenter
> >
> > Thanks. I'll test it.
> > BTW, Qemu codestyle is different, and tab should be replaced with blanks.
> >
> 
> Here is where I am. User space code (busybox) was compiled
> using the unicore toolchain available on the web.
> 
> ...
> serio: i8042 KBD port at 0x6eb00060,0x6eb00064 irq 22
> mousedev: PS/2 mouse device common for all mice
> Enable UniCore-F64 support.
> Warning: unable to open an initial console.
> Freeing unused kernel memory: 1156K (c0408000 - c0529000)
> 
> Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> 
> ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> 
> The kernel tries to execute the init program, which fails with SIGSEGV.
> I confirmed that the init program is loaded and starts to execute.
> 
> Any idea what might cause such a problem ?
> 
> Thanks,
> Guenter
> 
'slink /init             /bin/busybox 777 0 0' should be inserted in initramfs config
Also, I recommend compile busybox statically for initramfs.

I need more information, including full kmsg and initramfs configs

My qemu commands as following. Maybe useful.

qemu-new:
        @test -d $(DIR_WORKING)/qemu-unicore32 ||               \
                mkdir -p $(DIR_WORKING)/qemu-unicore32
        @echo "Remove old qemu repo ..."
        @rm -fr $(DIR_WORKING)/qemu
        @cd $(DIR_WORKING); git clone $(QEMU_GITREPO)
        @cd $(DIR_WORKING)/qemu;                                \
                git br unicore32 origin/unicore32;              \
                git co unicore32

qemu-make:
        @echo "Configure qemu ..."
        @cd $(DIR_WORKING)/qemu; ./configure                    \
                --enable-trace-backend=stderr                   \
                --target-list=$(QEMU_TARGETS)                   \
                --enable-debug                                  \
                --disable-sdl                                   \
                --interp-prefix=$(DIR_GNU_UC)                   \
                --prefix=$(DIR_WORKING)/qemu-unicore32          \
                >> $(QEMU_BUILDLOG) 2>&1
        @echo "Make qemu and make install ..."
        @make -C $(DIR_WORKING)/qemu -j4 >> $(QEMU_BUILDLOG) 2>&1
        @make -C $(DIR_WORKING)/qemu install >> $(QEMU_BUILDLOG) 2>&1

qemu-run:
        @echo "Remove old log file"
        @rm -fr $(QEMU_TRACELOG)
        @echo "Running QEMU in this tty ..."
        @$(DIR_WORKING)/qemu-unicore32/bin/qemu-system-unicore32\
                -curses                                         \
                -M puv3                                         \
                -m 512                                          \
                -icount 0                                       \
                -kernel $(DIR_WORKING)/zImage                   \
                -net nic                                        \
                -net tap,ifname=tap_$(USER),script=no,downscript=no     \
                -append "root=/dev/nfs nfsroot=192.168.200.161:/export/guestroot/,tcp rw ip=192.168.122.4"    \
                2> $(QEMU_TRACELOG)

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