From: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
To: Claudiu Zissulescu Ianculescu <claziss@gmail.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Steven Rostedt" <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
"linux-snps-arc@lists.infradead.org"
<linux-snps-arc@lists.infradead.org>,
Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>,
Vineet Gupta <Vineet.Gupta1@synopsys.com>
Subject: RE: [RFC] ARC: initial ftrace support
Date: Thu, 2 Apr 2020 14:15:37 +0000 [thread overview]
Message-ID: <CY4PR1201MB01207268EA87209A55C31D44A1C60@CY4PR1201MB0120.namprd12.prod.outlook.com> (raw)
In-Reply-To: <CAL0iMy3i5+_owqJcUKWzGNFakVV2P=oFdyAWCY2LP7YTusKP_Q@mail.gmail.com>
Hi Claus,
> -----Original Message-----
> From: linux-snps-arc <linux-snps-arc-bounces@lists.infradead.org> On Behalf Of Claudiu Zissulescu
> Ianculescu
> Sent: Thursday, April 2, 2020 11:10 AM
> To: Vineet Gupta <vgupta@synopsys.com>
> Cc: Alexey Brodkin <abrodkin@synopsys.com>; linux-kernel@vger.kernel.org; Steven Rostedt
> <rostedt@goodmis.org>; Ingo Molnar <mingo@redhat.com>; linux-snps-arc@lists.infradead.org; Eugeniy
> Paltsev <paltsev@synopsys.com>
> Subject: Re: [RFC] ARC: initial ftrace support
>
> Hi,
>
> ARC-gcc has two modes to call the mcount routines. When using elf32
> configuration, the toolchain is set to use newlib mcount. When
> configured for linux, gcc toolchain is using a library call to _mcall
> (single underscore) having blink as input argument.
> So, using the proper linux toolchain, your patch should work.
Is there a chance to switch to Linux-style mcount in Elf32 toolchain with a command-line
option?
Otherwise I guess we'll need to implement some warning which explicitly says why Elf32
toolchain is not usable for building the Linux kernel... at least in case with ftrace enabled.
-Alexey
WARNING: multiple messages have this Message-ID (diff)
From: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
To: Claudiu Zissulescu Ianculescu <claziss@gmail.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
"linux-snps-arc@lists.infradead.org"
<linux-snps-arc@lists.infradead.org>,
Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Subject: RE: [RFC] ARC: initial ftrace support
Date: Thu, 2 Apr 2020 14:15:37 +0000 [thread overview]
Message-ID: <CY4PR1201MB01207268EA87209A55C31D44A1C60@CY4PR1201MB0120.namprd12.prod.outlook.com> (raw)
In-Reply-To: <CAL0iMy3i5+_owqJcUKWzGNFakVV2P=oFdyAWCY2LP7YTusKP_Q@mail.gmail.com>
Hi Claus,
> -----Original Message-----
> From: linux-snps-arc <linux-snps-arc-bounces@lists.infradead.org> On Behalf Of Claudiu Zissulescu
> Ianculescu
> Sent: Thursday, April 2, 2020 11:10 AM
> To: Vineet Gupta <vgupta@synopsys.com>
> Cc: Alexey Brodkin <abrodkin@synopsys.com>; linux-kernel@vger.kernel.org; Steven Rostedt
> <rostedt@goodmis.org>; Ingo Molnar <mingo@redhat.com>; linux-snps-arc@lists.infradead.org; Eugeniy
> Paltsev <paltsev@synopsys.com>
> Subject: Re: [RFC] ARC: initial ftrace support
>
> Hi,
>
> ARC-gcc has two modes to call the mcount routines. When using elf32
> configuration, the toolchain is set to use newlib mcount. When
> configured for linux, gcc toolchain is using a library call to _mcall
> (single underscore) having blink as input argument.
> So, using the proper linux toolchain, your patch should work.
Is there a chance to switch to Linux-style mcount in Elf32 toolchain with a command-line
option?
Otherwise I guess we'll need to implement some warning which explicitly says why Elf32
toolchain is not usable for building the Linux kernel... at least in case with ftrace enabled.
-Alexey
_______________________________________________
linux-snps-arc mailing list
linux-snps-arc@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-snps-arc
next prev parent reply other threads:[~2020-04-02 14:15 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-27 15:53 [RFC] ARC: initial ftrace support Eugeniy Paltsev
2020-03-27 15:53 ` Eugeniy Paltsev
2020-03-27 17:10 ` Steven Rostedt
2020-03-27 17:10 ` Steven Rostedt
2020-04-02 1:17 ` Vineet Gupta
2020-04-02 1:17 ` Vineet Gupta
2020-04-02 8:10 ` Claudiu Zissulescu Ianculescu
2020-04-02 8:10 ` Claudiu Zissulescu Ianculescu
2020-04-02 14:15 ` Alexey Brodkin [this message]
2020-04-02 14:15 ` Alexey Brodkin
2020-05-14 13:09 ` Eugeniy Paltsev
2020-05-14 13:09 ` Eugeniy Paltsev
2020-04-02 17:52 ` Steven Rostedt
2020-04-02 17:52 ` Steven Rostedt
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