linux-kernel - Re: [PATCH -tip v14 01/12] x86: instruction decoder API

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Message-ID: <20090820144608.GC6389@nowhere>
Date:	Thu, 20 Aug 2009 16:46:10 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org>,
	lkml <linux-kernel@...r.kernel.org>,
	systemtap <systemtap@...rces.redhat.com>,
	kvm <kvm@...r.kernel.org>,
	DLE <dle-develop@...ts.sourceforge.net>,
	Jim Keniston <jkenisto@...ibm.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Avi Kivity <avi@...hat.com>, Andi Kleen <ak@...ux.intel.com>,
	Christoph Hellwig <hch@...radead.org>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Jason Baron <jbaron@...hat.com>,
	"K.Prasad" <prasad@...ux.vnet.ibm.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Li Zefan <lizf@...fujitsu.com>,
	PrzemysławPawełczyk <przemyslaw@...elczyk.it>,
	Roland McGrath <roland@...hat.com>,
	Sam Ravnborg <sam@...nborg.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Tom Zanussi <tzanussi@...il.com>,
	Vegard Nossum <vegard.nossum@...il.com>
Subject: Re: [PATCH -tip v14 01/12] x86: instruction decoder API

On Thu, Aug 20, 2009 at 10:42:05AM -0400, Masami Hiramatsu wrote:
> Frederic Weisbecker wrote:
>> On Thu, Aug 13, 2009 at 04:34:13PM -0400, Masami Hiramatsu wrote:
>>> Add x86 instruction decoder to arch-specific libraries. This decoder
>>> can decode x86 instructions used in kernel into prefix, opcode, modrm,
>>> sib, displacement and immediates. This can also show the length of
>>> instructions.
>>>
>>> This version introduces instruction attributes for decoding instructions.
>>> The instruction attribute tables are generated from the opcode map file
>>> (x86-opcode-map.txt) by the generator script(gen-insn-attr-x86.awk).
>>>
>>> Currently, the opcode maps are based on opcode maps in Intel(R) 64 and
>>> IA-32 Architectures Software Developers Manual Vol.2: Appendix.A,
>>> and consist of below two types of opcode tables.
>>>
>>> 1-byte/2-bytes/3-bytes opcodes, which has 256 elements, are
>>> written as below;
>>>
>>>   Table: table-name
>>>   Referrer: escaped-name
>>>   opcode: mnemonic|GrpXXX [operand1[,operand2...]] [(extra1)[,(extra2)...] [| 2nd-mnemonic ...]
>>>    (or)
>>>   opcode: escape # escaped-name
>>>   EndTable
>>>
>>> Group opcodes, which has 8 elements, are written as below;
>>>
>>>   GrpTable: GrpXXX
>>>   reg:  mnemonic [operand1[,operand2...]] [(extra1)[,(extra2)...] [| 2nd-mnemonic ...]
>>>   EndTable
>>>
>>> These opcode maps include a few SSE and FP opcodes (for setup), because
>>> those opcodes are used in the kernel.
>>>
>>
>>
>> I'm getting the following build error on an old K7 box:
>>
>> arch/x86/lib/inat.c: In function ‘inat_get_opcode_attribute’:
>> arch/x86/lib/inat.c:29: erreur: ‘inat_primary_table’ undeclared (first use in this function)
>> arch/x86/lib/inat.c:29: erreur: (Each undeclared identifier is reported only once
>> arch/x86/lib/inat.c:29: erreur: for each function it appears in.)
>
> Thanks for reporting!
> Hmm, it seems that inat-tables.c is not correctly generated.
> Could you tell me which awk you used and send the inat-tables.c?
>
> Thank you,
>


Sure:

$ awk -Wv
mawk 1.3.3 Nov 1996, Copyright (C) Michael D. Brennan

compiled limits:
max NF             32767
sprintf buffer      2040

And I've sent you the content of inat_tables.c in the other answer :)

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