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

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Message-ID: <20090820002113.GK4972@nowhere>
Date:	Thu, 20 Aug 2009 02:21:14 +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 01:42:31AM +0200, 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.)
> 
> 
> I've attached my config. I haven't such problem on a dual x86-64 box.


Actually I have the same problem in x86-64
The content of my arch/x86/lib/inat-tables.c:

/* x86 opcode map generated from x86-opcode-map.txt */
/* Do not change this code. */
/* Table: one byte opcode */
/* Escape opcode map array */
const insn_attr_t const *inat_escape_tables[INAT_ESC_MAX + 1][INAT_LPREFIX_MAX + 1] = {
};

/* Group opcode map array */
const insn_attr_t const *inat_group_tables[INAT_GRP_MAX + 1][INAT_LPREFIX_MAX + 1] = {
};


I guess there is a problem with the generation of this file.

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