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
Add initial ftrace support for ARCv2. We add support only for
function tracer (the simplest, not dynamic one), however it is
prerequisite for dynamic function tracer and other complex
ones.
Signed-off-by: Eugeniy Paltsev
---
arch/arc/Kconfig | 1 +
arch/arc/include/asm/Kbuild |
