LinuxLists.cc - [PATCH] gen-insn-attr-x86.awk: Fix regexp warnings

2019-09-22 19:19:53

Subject: [PATCH] gen-insn-attr-x86.awk: Fix regexp warnings

2019-09-23 15:31:29

Subject: Re: [PATCH] gen-insn-attr-x86.awk: Fix regexp warnings

Hi Alexander,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[cannot apply to v5.3 next-20190920]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url: https://github.com/0day-ci/linux/commits/Alexander-Kapshuk/gen-insn-attr-x86-awk-Fix-regexp-warnings/20190921-194307
config: x86_64-lkp (attached as .config)
compiler: gcc-7 (Debian 7.4.0-13) 7.4.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
:::::: branch date: 73 minutes ago
:::::: commit date: 73 minutes ago

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <[email protected]>

All warnings (new ones prefixed by >>):

>> Warning: Kernel ABI header at 'tools/arch/x86/tools/gen-insn-attr-x86.awk' differs from latest version at 'arch/x86/tools/gen-insn-attr-x86.awk'
55 real 10 user 5 sys 29.61% cpu make prepare

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

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2019-09-23 20:32:17

by Alexander Kapshuk

[permalink] [raw]

Subject: [PATCH RESEND] gen-insn-attr-x86.awk: Fix regexp warnings

This patch fixes the regexp warnings shown below:
GEN /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is not a known regexp operator

The ':' and '&' characters need not escaping when used in string constants
as part of regular expressions.

[Test-run]
awk -f arch/x86/tools/gen-insn-attr-x86.awk \
arch/x86/lib/x86-opcode-map.txt >../tmp/inat-tables.c

diff arch/x86/lib/inat-tables.c ~/tmp/inat-tables.c; echo $?
0

awk -f tools/arch/x86/tools/gen-insn-attr-x86.awk \
tools/arch/x86/lib/x86-opcode-map.txt >../tmp/inat-tables.c

diff tools/objtool/arch/x86/lib/inat-tables.c ~/tmp/inat-tables.c; echo $?
0

[Debugging output]
DBG:ext:(66&F2)
DBG:match(ext, ...):(66&F2)
DBG:match(..., lprefix3_expr):$(F2|!F3|66&F2)$

Signed-off-by: Alexander Kapshuk <[email protected]>
Reported-by: kbuild test robot <[email protected]>
---
arch/x86/tools/gen-insn-attr-x86.awk | 4 ++--
tools/arch/x86/tools/gen-insn-attr-x86.awk | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/tools/gen-insn-attr-x86.awk b/arch/x86/tools/gen-insn-attr-x86.awk
index b02a36b2c14f..a42015b305f4 100644
--- a/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/arch/x86/tools/gen-insn-attr-x86.awk
@@ -69,7 +69,7 @@ BEGIN {

lprefix1_expr = "\$(66|!F3)\$"
lprefix2_expr = "\$F3\$"
- lprefix3_expr = "\$(F2|!F3|66\\&F2)\$"
+ lprefix3_expr = "\$(F2|!F3|66&F2)\$"
lprefix_expr = "\$(66|F2|F3)\$"
max_lprefix = 4

@@ -257,7 +257,7 @@ function convert_operands(count,opnd, i,j,imm,mod)
return add_flags(imm, mod)
}

-/^[0-9a-f]+\:/ {
+/^[0-9a-f]+:/ {
if (NR == 1)
next
# get index
diff --git a/tools/arch/x86/tools/gen-insn-attr-x86.awk b/tools/arch/x86/tools/gen-insn-attr-x86.awk
index b02a36b2c14f..a42015b305f4 100644
--- a/tools/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/tools/arch/x86/tools/gen-insn-attr-x86.awk
@@ -69,7 +69,7 @@ BEGIN {

lprefix1_expr = "\$(66|!F3)\$"
lprefix2_expr = "\$F3\$"
- lprefix3_expr = "\$(F2|!F3|66\\&F2)\$"
+ lprefix3_expr = "\$(F2|!F3|66&F2)\$"
lprefix_expr = "\$(66|F2|F3)\$"
max_lprefix = 4

@@ -257,7 +257,7 @@ function convert_operands(count,opnd, i,j,imm,mod)
return add_flags(imm, mod)
}

-/^[0-9a-f]+\:/ {
+/^[0-9a-f]+:/ {
if (NR == 1)
next
# get index
--
2.23.0

2019-09-24 16:58:38

by Alexander Kapshuk

[permalink] [raw]

Subject: Re: [PATCH RESEND] gen-insn-attr-x86.awk: Fix regexp warnings

On Mon, Sep 23, 2019 at 12:19 PM Borislav Petkov <[email protected]> wrote:
>
> On Sun, Sep 22, 2019 at 06:03:28PM +0300, Alexander Kapshuk wrote:
> > This patch fixes the regexp warnings shown below:
> > GEN /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
> > awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
> > awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is not a known regexp operator
> >
> > The ':' and '&' characters need not escaping when used in string constants
> > as part of regular expressions.
>
> How do you trigger this?
>
> I don't see it in my builds so it looks like environment thing. What
> flavor of awk is yours?
>
> Thx.
>
> --
> Regards/Gruss,
> Boris.
>
> https://people.kernel.org/tglx/notes-about-netiquette

gawk 5.0.1-1 on Arch Linux.

2019-09-25 10:03:14

by Borislav Petkov

[permalink] [raw]

Subject: Re: [PATCH RESEND] gen-insn-attr-x86.awk: Fix regexp warnings

On Sun, Sep 22, 2019 at 06:03:28PM +0300, Alexander Kapshuk wrote:
> This patch fixes the regexp warnings shown below:
> GEN /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
> awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
> awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is not a known regexp operator
>
> The ':' and '&' characters need not escaping when used in string constants
> as part of regular expressions.

How do you trigger this?

I don't see it in my builds so it looks like environment thing. What
flavor of awk is yours?

Thx.

--
Regards/Gruss,
Boris.

https://people.kernel.org/tglx/notes-about-netiquette

2019-09-25 11:04:50

by Alexander Kapshuk

[permalink] [raw]

Subject: Re: [PATCH RESEND] gen-insn-attr-x86.awk: Fix regexp warnings

On Mon, Sep 23, 2019 at 1:31 PM Borislav Petkov <[email protected]> wrote:
>
> + Masami.
>
> On Sun, Sep 22, 2019 at 06:03:28PM +0300, Alexander Kapshuk wrote:
> > This patch fixes the regexp warnings shown below:
>
> Avoid having "This patch" or "This commit" in the commit message. It is
> tautologically useless.
>
> Also, do
>
> $ git grep 'This patch' Documentation/process
>
> for more details.
>
> > GEN /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
> > awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
> > awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is not a known regexp operator
> >
> > The ':' and '&' characters need not escaping when used in string constants
> > as part of regular expressions.
>
> I could use a reasoning here, as in, "gawk manual doesn't have those two
> characters in the list here:
>
> https://www.gnu.org/software/gawk/manual/html_node/Escape-Sequences.html"
>
> or so.
>
> >
> > [Test-run]
> > awk -f arch/x86/tools/gen-insn-attr-x86.awk \
> > arch/x86/lib/x86-opcode-map.txt >../tmp/inat-tables.c
> >
> > diff arch/x86/lib/inat-tables.c ~/tmp/inat-tables.c; echo $?
> > 0
> >
> > awk -f tools/arch/x86/tools/gen-insn-attr-x86.awk \
> > tools/arch/x86/lib/x86-opcode-map.txt >../tmp/inat-tables.c
> >
> > diff tools/objtool/arch/x86/lib/inat-tables.c ~/tmp/inat-tables.c; echo $?
> > 0
>
> No need for that - just say that diffing the output before and after
> shows no changes.
>
> > [Debugging output]
> > DBG:ext:(66&F2)
> > DBG:match(ext, ...):(66&F2)
> > DBG:match(..., lprefix3_expr):$(F2|!F3|66&F2)$
>
> That is supposed to say what exactly? That it still does what it is
> expected to do?

That was the intention.

Thanks for reviewing the patch.
I'll wait to hear from Masami before resending the patch.

>
> Leaving in the rest for Masami.
>
> Thx.
> --
> Regards/Gruss,
> Boris.
>
> https://people.kernel.org/tglx/notes-about-netiquette

2019-09-25 11:42:37

by Borislav Petkov

[permalink] [raw]

Subject: Re: [PATCH RESEND] gen-insn-attr-x86.awk: Fix regexp warnings

On Mon, Sep 23, 2019 at 12:56:14PM +0300, Alexander Kapshuk wrote:
> On Mon, Sep 23, 2019 at 12:19 PM Borislav Petkov <[email protected]> wrote:
> >
> > On Sun, Sep 22, 2019 at 06:03:28PM +0300, Alexander Kapshuk wrote:
> > > This patch fixes the regexp warnings shown below:
> > > GEN /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
> > > awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
> > > awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is not a known regexp operator
> > >
> > > The ':' and '&' characters need not escaping when used in string constants
> > > as part of regular expressions.
> >
> > How do you trigger this?
> >
> > I don't see it in my builds so it looks like environment thing. What
> > flavor of awk is yours?
> >
> > Thx.
> >
> > --
> > Regards/Gruss,
> > Boris.
> >
> > https://people.kernel.org/tglx/notes-about-netiquette
>
> gawk 5.0.1-1 on Arch Linux.

Ok, looks like they're enforcing it in v5 as v4 which I have doesn't
complain. Please add that fact to the commit message.

More review as a reply to your second patch.

--
Regards/Gruss,
Boris.

https://people.kernel.org/tglx/notes-about-netiquette

2019-09-25 11:42:37

by Borislav Petkov

[permalink] [raw]

Subject: Re: [PATCH RESEND] gen-insn-attr-x86.awk: Fix regexp warnings

+ Masami.

On Sun, Sep 22, 2019 at 06:03:28PM +0300, Alexander Kapshuk wrote:
> This patch fixes the regexp warnings shown below:

Avoid having "This patch" or "This commit" in the commit message. It is
tautologically useless.

Also, do

$ git grep 'This patch' Documentation/process

for more details.

> GEN /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
> awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
> awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is not a known regexp operator
>
> The ':' and '&' characters need not escaping when used in string constants
> as part of regular expressions.

I could use a reasoning here, as in, "gawk manual doesn't have those two
characters in the list here:

https://www.gnu.org/software/gawk/manual/html_node/Escape-Sequences.html"

or so.

>
> [Test-run]
> awk -f arch/x86/tools/gen-insn-attr-x86.awk \
> arch/x86/lib/x86-opcode-map.txt >../tmp/inat-tables.c
>
> diff arch/x86/lib/inat-tables.c ~/tmp/inat-tables.c; echo $?
> 0
>
> awk -f tools/arch/x86/tools/gen-insn-attr-x86.awk \
> tools/arch/x86/lib/x86-opcode-map.txt >../tmp/inat-tables.c
>
> diff tools/objtool/arch/x86/lib/inat-tables.c ~/tmp/inat-tables.c; echo $?
> 0

No need for that - just say that diffing the output before and after
shows no changes.

> [Debugging output]
> DBG:ext:(66&F2)
> DBG:match(ext, ...):(66&F2)
> DBG:match(..., lprefix3_expr):$(F2|!F3|66&F2)$

That is supposed to say what exactly? That it still does what it is
expected to do?

Leaving in the rest for Masami.

Thx.

> Signed-off-by: Alexander Kapshuk <[email protected]>
> Reported-by: kbuild test robot <[email protected]>
> ---
> arch/x86/tools/gen-insn-attr-x86.awk | 4 ++--
> tools/arch/x86/tools/gen-insn-attr-x86.awk | 4 ++--
> 2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/arch/x86/tools/gen-insn-attr-x86.awk b/arch/x86/tools/gen-insn-attr-x86.awk
> index b02a36b2c14f..a42015b305f4 100644
> --- a/arch/x86/tools/gen-insn-attr-x86.awk
> +++ b/arch/x86/tools/gen-insn-attr-x86.awk
> @@ -69,7 +69,7 @@ BEGIN {
>
> lprefix1_expr = "\$(66|!F3)\$"
> lprefix2_expr = "\$F3\$"
> - lprefix3_expr = "\$(F2|!F3|66\\&F2)\$"
> + lprefix3_expr = "\$(F2|!F3|66&F2)\$"
> lprefix_expr = "\$(66|F2|F3)\$"
> max_lprefix = 4
>
> @@ -257,7 +257,7 @@ function convert_operands(count,opnd, i,j,imm,mod)
> return add_flags(imm, mod)
> }
>
> -/^[0-9a-f]+\:/ {
> +/^[0-9a-f]+:/ {
> if (NR == 1)
> next
> # get index
> diff --git a/tools/arch/x86/tools/gen-insn-attr-x86.awk b/tools/arch/x86/tools/gen-insn-attr-x86.awk
> index b02a36b2c14f..a42015b305f4 100644
> --- a/tools/arch/x86/tools/gen-insn-attr-x86.awk
> +++ b/tools/arch/x86/tools/gen-insn-attr-x86.awk
> @@ -69,7 +69,7 @@ BEGIN {
>
> lprefix1_expr = "\$(66|!F3)\$"
> lprefix2_expr = "\$F3\$"
> - lprefix3_expr = "\$(F2|!F3|66\\&F2)\$"
> + lprefix3_expr = "\$(F2|!F3|66&F2)\$"
> lprefix_expr = "\$(66|F2|F3)\$"
> max_lprefix = 4
>
> @@ -257,7 +257,7 @@ function convert_operands(count,opnd, i,j,imm,mod)
> return add_flags(imm, mod)
> }
>
> -/^[0-9a-f]+\:/ {
> +/^[0-9a-f]+:/ {
> if (NR == 1)
> next
> # get index
> --
> 2.23.0
>

--
Regards/Gruss,
Boris.

https://people.kernel.org/tglx/notes-about-netiquette

2019-09-25 22:28:43

by Masami Hiramatsu

[permalink] [raw]

Subject: Re: [PATCH RESEND] gen-insn-attr-x86.awk: Fix regexp warnings

On Mon, 23 Sep 2019 12:31:39 +0200
Borislav Petkov <[email protected]> wrote:

> + Masami.
>
> On Sun, Sep 22, 2019 at 06:03:28PM +0300, Alexander Kapshuk wrote:
> > This patch fixes the regexp warnings shown below:
>
> Avoid having "This patch" or "This commit" in the commit message. It is
> tautologically useless.
>
> Also, do
>
> $ git grep 'This patch' Documentation/process
>
> for more details.
>
> > GEN /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
> > awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
> > awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is not a known regexp operator
> >
> > The ':' and '&' characters need not escaping when used in string constants
> > as part of regular expressions.
>
> I could use a reasoning here, as in, "gawk manual doesn't have those two
> characters in the list here:
>
> https://www.gnu.org/software/gawk/manual/html_node/Escape-Sequences.html"

Thank you for pointing it out. It is good to refer this page as the
reason of this patch.

I couldn't remember why I added those escapes on those... (maybe for
compatibility with mawk? anyway, nowadays there seems no problem)

>
> or so.
>
> >
> > [Test-run]
> > awk -f arch/x86/tools/gen-insn-attr-x86.awk \
> > arch/x86/lib/x86-opcode-map.txt >../tmp/inat-tables.c
> >
> > diff arch/x86/lib/inat-tables.c ~/tmp/inat-tables.c; echo $?
> > 0
> >
> > awk -f tools/arch/x86/tools/gen-insn-attr-x86.awk \
> > tools/arch/x86/lib/x86-opcode-map.txt >../tmp/inat-tables.c
> >
> > diff tools/objtool/arch/x86/lib/inat-tables.c ~/tmp/inat-tables.c; echo $?
> > 0
>
> No need for that - just say that diffing the output before and after
> shows no changes.
>
> > [Debugging output]
> > DBG:ext:(66&F2)
> > DBG:match(ext, ...):(66&F2)
> > DBG:match(..., lprefix3_expr):$(F2|!F3|66&F2)$
>
> That is supposed to say what exactly? That it still does what it is
> expected to do?
>
> Leaving in the rest for Masami.

This looks good to me, except for the description pointed above.
So feel free to add my ack on your patch on next version.

Acked-by: Masami Hiramatsu <[email protected]>

Thank you,
>
> Thx.
>
> > Signed-off-by: Alexander Kapshuk <[email protected]>
> > Reported-by: kbuild test robot <[email protected]>
> > ---
> > arch/x86/tools/gen-insn-attr-x86.awk | 4 ++--
> > tools/arch/x86/tools/gen-insn-attr-x86.awk | 4 ++--
> > 2 files changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/arch/x86/tools/gen-insn-attr-x86.awk b/arch/x86/tools/gen-insn-attr-x86.awk
> > index b02a36b2c14f..a42015b305f4 100644
> > --- a/arch/x86/tools/gen-insn-attr-x86.awk
> > +++ b/arch/x86/tools/gen-insn-attr-x86.awk
> > @@ -69,7 +69,7 @@ BEGIN {
> >
> > lprefix1_expr = "\$(66|!F3)\$"
> > lprefix2_expr = "\$F3\$"
> > - lprefix3_expr = "\$(F2|!F3|66\\&F2)\$"
> > + lprefix3_expr = "\$(F2|!F3|66&F2)\$"
> > lprefix_expr = "\$(66|F2|F3)\$"
> > max_lprefix = 4
> >
> > @@ -257,7 +257,7 @@ function convert_operands(count,opnd, i,j,imm,mod)
> > return add_flags(imm, mod)
> > }
> >
> > -/^[0-9a-f]+\:/ {
> > +/^[0-9a-f]+:/ {
> > if (NR == 1)
> > next
> > # get index
> > diff --git a/tools/arch/x86/tools/gen-insn-attr-x86.awk b/tools/arch/x86/tools/gen-insn-attr-x86.awk
> > index b02a36b2c14f..a42015b305f4 100644
> > --- a/tools/arch/x86/tools/gen-insn-attr-x86.awk
> > +++ b/tools/arch/x86/tools/gen-insn-attr-x86.awk
> > @@ -69,7 +69,7 @@ BEGIN {
> >
> > lprefix1_expr = "\$(66|!F3)\$"
> > lprefix2_expr = "\$F3\$"
> > - lprefix3_expr = "\$(F2|!F3|66\\&F2)\$"
> > + lprefix3_expr = "\$(F2|!F3|66&F2)\$"
> > lprefix_expr = "\$(66|F2|F3)\$"
> > max_lprefix = 4
> >
> > @@ -257,7 +257,7 @@ function convert_operands(count,opnd, i,j,imm,mod)
> > return add_flags(imm, mod)
> > }
> >
> > -/^[0-9a-f]+\:/ {
> > +/^[0-9a-f]+:/ {
> > if (NR == 1)
> > next
> > # get index
> > --
> > 2.23.0
> >
>
> --
> Regards/Gruss,
> Boris.
>
> https://people.kernel.org/tglx/notes-about-netiquette

--
Masami Hiramatsu <[email protected]>

2019-09-26 00:41:14

by Alexander Kapshuk

[permalink] [raw]

Subject: [PATCH RESEND] gen-insn-attr-x86.awk: Fix regexp warnings

gawk 5.0.1 generates the regexp warnings shown below:
GEN /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is not a known regexp operator

Ealier versions of gawk are not known to generate these warnings.

The gawk manual referenced below does not list characters ':' and '&'
as needing escaping, so 'unescape' them.
https://www.gnu.org/software/gawk/manual/html_node/Escape-Sequences.html

Running diff on the output generated by the script before and after
applying the patch reported no differences.

Signed-off-by: Alexander Kapshuk <[email protected]>
Reported-by: kbuild test robot <[email protected]>
Reviewed-by: Borislav Petkov <[email protected]>
Acked-by: Masami Hiramatsu <[email protected]>
---
arch/x86/tools/gen-insn-attr-x86.awk | 4 ++--
tools/arch/x86/tools/gen-insn-attr-x86.awk | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/tools/gen-insn-attr-x86.awk b/arch/x86/tools/gen-insn-attr-x86.awk
index b02a36b2c14f..a42015b305f4 100644
--- a/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/arch/x86/tools/gen-insn-attr-x86.awk
@@ -69,7 +69,7 @@ BEGIN {

lprefix1_expr = "\$(66|!F3)\$"
lprefix2_expr = "\$F3\$"
- lprefix3_expr = "\$(F2|!F3|66\\&F2)\$"
+ lprefix3_expr = "\$(F2|!F3|66&F2)\$"
lprefix_expr = "\$(66|F2|F3)\$"
max_lprefix = 4

@@ -257,7 +257,7 @@ function convert_operands(count,opnd, i,j,imm,mod)
return add_flags(imm, mod)
}

-/^[0-9a-f]+\:/ {
+/^[0-9a-f]+:/ {
if (NR == 1)
next
# get index
diff --git a/tools/arch/x86/tools/gen-insn-attr-x86.awk b/tools/arch/x86/tools/gen-insn-attr-x86.awk
index b02a36b2c14f..a42015b305f4 100644
--- a/tools/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/tools/arch/x86/tools/gen-insn-attr-x86.awk
@@ -69,7 +69,7 @@ BEGIN {

lprefix1_expr = "\$(66|!F3)\$"
lprefix2_expr = "\$F3\$"
- lprefix3_expr = "\$(F2|!F3|66\\&F2)\$"
+ lprefix3_expr = "\$(F2|!F3|66&F2)\$"
lprefix_expr = "\$(66|F2|F3)\$"
max_lprefix = 4

@@ -257,7 +257,7 @@ function convert_operands(count,opnd, i,j,imm,mod)
return add_flags(imm, mod)
}

-/^[0-9a-f]+\:/ {
+/^[0-9a-f]+:/ {
if (NR == 1)
next
# get index
--
2.23.0

2019-09-30 05:38:39

by Borislav Petkov

[permalink] [raw]

Subject: Re: [PATCH RESEND] gen-insn-attr-x86.awk: Fix regexp warnings

On Tue, Sep 24, 2019 at 07:46:59AM +0300, Alexander Kapshuk wrote:
> gawk 5.0.1 generates the regexp warnings shown below:
> GEN /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
> awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
> awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is not a known regexp operator
>
> Ealier versions of gawk are not known to generate these warnings.
>
> The gawk manual referenced below does not list characters ':' and '&'
> as needing escaping, so 'unescape' them.
> https://www.gnu.org/software/gawk/manual/html_node/Escape-Sequences.html
>
> Running diff on the output generated by the script before and after
> applying the patch reported no differences.
>
> Signed-off-by: Alexander Kapshuk <[email protected]>
> Reported-by: kbuild test robot <[email protected]>
> Reviewed-by: Borislav Petkov <[email protected]>

This is not how Reviewed-by works. Read here:

https://www.kernel.org/doc/html/latest/process/submitting-patches.html#using-reported-by-tested-by-reviewed-by-suggested-by-and-fixes

for future reference. I fixed it up now.

Thx.

--
Regards/Gruss,
Boris.

https://people.kernel.org/tglx/notes-about-netiquette

2019-09-30 05:49:40

by Alexander Kapshuk

[permalink] [raw]

Subject: Re: [PATCH RESEND] gen-insn-attr-x86.awk: Fix regexp warnings

On Mon, Sep 30, 2019 at 8:35 AM Borislav Petkov <[email protected]> wrote:
>
> On Tue, Sep 24, 2019 at 07:46:59AM +0300, Alexander Kapshuk wrote:
> > gawk 5.0.1 generates the regexp warnings shown below:
> > GEN /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
> > awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
> > awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is not a known regexp operator
> >
> > Ealier versions of gawk are not known to generate these warnings.
> >
> > The gawk manual referenced below does not list characters ':' and '&'
> > as needing escaping, so 'unescape' them.
> > https://www.gnu.org/software/gawk/manual/html_node/Escape-Sequences.html
> >
> > Running diff on the output generated by the script before and after
> > applying the patch reported no differences.
> >
> > Signed-off-by: Alexander Kapshuk <[email protected]>
> > Reported-by: kbuild test robot <[email protected]>
> > Reviewed-by: Borislav Petkov <[email protected]>
>
> This is not how Reviewed-by works. Read here:
>
> https://www.kernel.org/doc/html/latest/process/submitting-patches.html#using-reported-by-tested-by-reviewed-by-suggested-by-and-fixes
>
> for future reference. I fixed it up now.
>
> Thx.
>
> --
> Regards/Gruss,
> Boris.
>
> https://people.kernel.org/tglx/notes-about-netiquette

Thank you for taking in the patch and clarifying my misunderstanding
about the use of 'Reviewed-by'.
Point taken.

2019-10-01 10:24:20

by tip-bot2 for Alexey Makhalov

[permalink] [raw]

Subject: [tip: core/objtool] x86/insn: Fix awk regexp warnings

The following commit has been merged into the core/objtool branch of tip:

Commit-ID: 700c1018b86d0d4b3f1f2d459708c0cdf42b521d
Gitweb: https://git.kernel.org/tip/700c1018b86d0d4b3f1f2d459708c0cdf42b521d
Author: Alexander Kapshuk <[email protected]>
AuthorDate: Tue, 24 Sep 2019 07:46:59 +03:00
Committer: Borislav Petkov <[email protected]>
CommitterDate: Tue, 01 Oct 2019 12:13:16 +02:00

x86/insn: Fix awk regexp warnings

gawk 5.0.1 generates the following regexp warnings:

GEN /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is not a known regexp operator

Ealier versions of gawk are not known to generate these warnings. The
gawk manual referenced below does not list characters ':' and '&' as
needing escaping, so 'unescape' them. See

https://www.gnu.org/software/gawk/manual/html_node/Escape-Sequences.html

for more info.

Running diff on the output generated by the script before and after
applying the patch reported no differences.

[ bp: Massage commit message. ]

[ Caught the respective tools header discrepancy. ]
Reported-by: kbuild test robot <[email protected]>
Signed-off-by: Alexander Kapshuk <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Masami Hiramatsu <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: "Peter Zijlstra (Intel)" <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: x86-ml <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
---
arch/x86/tools/gen-insn-attr-x86.awk | 4 ++--
tools/arch/x86/tools/gen-insn-attr-x86.awk | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/tools/gen-insn-attr-x86.awk b/arch/x86/tools/gen-insn-attr-x86.awk
index b02a36b..a42015b 100644
--- a/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/arch/x86/tools/gen-insn-attr-x86.awk
@@ -69,7 +69,7 @@ BEGIN {

lprefix1_expr = "\$(66|!F3)\$"
lprefix2_expr = "\$F3\$"
- lprefix3_expr = "\$(F2|!F3|66\\&F2)\$"
+ lprefix3_expr = "\$(F2|!F3|66&F2)\$"
lprefix_expr = "\$(66|F2|F3)\$"
max_lprefix = 4

@@ -257,7 +257,7 @@ function convert_operands(count,opnd, i,j,imm,mod)
return add_flags(imm, mod)
}

-/^[0-9a-f]+\:/ {
+/^[0-9a-f]+:/ {
if (NR == 1)
next
# get index
diff --git a/tools/arch/x86/tools/gen-insn-attr-x86.awk b/tools/arch/x86/tools/gen-insn-attr-x86.awk
index b02a36b..a42015b 100644
--- a/tools/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/tools/arch/x86/tools/gen-insn-attr-x86.awk
@@ -69,7 +69,7 @@ BEGIN {

lprefix1_expr = "\$(66|!F3)\$"
lprefix2_expr = "\$F3\$"
- lprefix3_expr = "\$(F2|!F3|66\\&F2)\$"
+ lprefix3_expr = "\$(F2|!F3|66&F2)\$"
lprefix_expr = "\$(66|F2|F3)\$"
max_lprefix = 4

@@ -257,7 +257,7 @@ function convert_operands(count,opnd, i,j,imm,mod)
return add_flags(imm, mod)
}

-/^[0-9a-f]+\:/ {
+/^[0-9a-f]+:/ {
if (NR == 1)
next
# get index