>>>>> In <[EMAIL PROTECTED]>
>>>>> NIIBE Yutaka <[EMAIL PROTECTED]> wrote:
>> Thanks for your attention. I'd like to express my thanks to your
>> continuous efforts for Debian SuperH, too. The (cross) bootstrap of
>> Debian SuperH is dedicated to you. :-)
Thanks, I'll work more hardly for Debian SuperH porting ;-)
>> ISHIKAWA Mutsumi wrote:
>> > But ABI level incompatibility does exist between SH3 binary and SH4
>> > binary, so binary for SH3 can not run on SH4 binary environmet.
>> > Of cause little endien and big endian incompatibility does exists.
>>
>> For endian, it is obvious that ABI is different.
>>
>> For the difference between SH3 and SH4, it's somewhat complicated. I
>> thought that SH4's ABI were backward compatible. Actually, almost all
>> existing binaries for SH3 work fine on SH4. You know, you can run
>> current Debian "sh-linux" on SH4.
Yes, I know. Almost all binary-sh packages works fine on Jornada690
(SH3 machine) and Dreamcast (SH4 machine)
>> However, according to Hitachi, the ABI is different between SH3 and
>> SH4. Please check out programming manuals of SH3 and SH4.
>> Instruction set are backward compatible. However, some instructions
>> are allowed in delay-slot for SH3 but not for SH4. I mean, if someone
>> tunes a program for SH3 pipeline, it may not work on SH4. It's easy
>> to write such program, if people use assembler. Current GCC does not
>> emit such a code (this is the reason why almost all code work fine).
>> But it's free to do so in future GCC, because the definition of ABI is
>> different.
>>
>> SH4 kernel could emulate such cases, in theory. We've discussed this
>> issue, but it found that it's quite hard...
OK, I understand it.
>> > So, 4 separated binary arcitecture tree?
>> >
>> > binary-sh3, binary-sh4, binary-sh3eb and binary-sh4eb
>> >
>> > Is it true?
>>
>> Exactly.
So, We should migrate from old binary tree (binary-sh) to
new binary trees (binary-sh3, binary-sh4, binary-sh3eb and
binary-sh4eb).
I want to propose the following prosess for smooth migration.
0. Stop to working for binary-sh tree.
(I've already stoped autobuilder for binary-sh)
1. Please add following binaries in ftp tree and katie database,
ftpmasters.
binary-sh3 ... Hitach SuperH SH3 little endian binaries
binary-sh4 ... Hitach SuperH SH4 little endian binaries
binary-sh3eb ... Hitach SuperH SH3 big endian binaries
binary-sh4eb ... Hitach SuperH SH4 big endian binaries
Is it better that I post these change to BTS as ftp.debian.org's bug,
ftpmaster?
2. dpkg's patch to support these architectures will be merged into
dpkg.deb. Is this patch already uploaded to ftp.m17n.org, NIIBE ?
3. binary-sh{3,4,3eb,4eb} build build build ....
4. binary-sh will be erased if it becomes at a certain time.
I'll ask this to ftpmaster at that time.
Almost all binary-sh packages ware built by Oliver M. Bolzer
<[EMAIL PROTECTED]>, YAEGASHI Takeshi <[EMAIL PROTECTED]> and me.
What do you think about this Oliver and Takeshi?
Are any problems in this migrate process?
--
ISHIKAWA Mutsumi
<[EMAIL PROTECTED]>, <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]>
