stedt; Ingo Molnar;
>linux-snps-arc@lists.infradead.org; Eugeniy Paltsev; Vineet Gupta
>Subject: RE: [RFC] ARC: initial ftrace support
>
> Hi Claus,
>
>> -Original Message-
>> From: linux-snps-arc On Behalf
>> Of Claudiu Zissulescu
>> Ianculescu
>
On Thu, 2 Apr 2020 01:17:01 +
Vineet Gupta wrote:
> +CC Claudiu
>
> On 3/27/20 10:10 AM, Steven Rostedt wrote:
> > On Fri, 27 Mar 2020 18:53:55 +0300
> > Eugeniy Paltsev wrote:
>
> Maybe add a comment that gcc does the heavy lifting: I have following in glibc
>
> +/* this is very simple
Molnar ;
> linux-snps-arc@lists.infradead.org; Eugeniy
> Paltsev
> 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
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, yo
+CC Claudiu
On 3/27/20 10:10 AM, Steven Rostedt wrote:
> On Fri, 27 Mar 2020 18:53:55 +0300
> Eugeniy Paltsev wrote:
Maybe add a comment that gcc does the heavy lifting: I have following in glibc
+/* this is very simple as gcc does all the heavy lifting at _mcount call site
+ * - sets up calle
On Fri, 27 Mar 2020 18:53:55 +0300
Eugeniy Paltsev wrote:
> +
> +noinline void _mcount(unsigned long parent_ip)
> +{
> + unsigned long ip = (unsigned long)__builtin_return_address(0);
> +
> + if (unlikely(ftrace_trace_function != ftrace_stub))
> + ftrace_trace_function(ip - MC
