On Wed, Jan 10, 2018 at 11:36:43AM -0500, Steven Rostedt wrote:
> On Wed, 10 Jan 2018 15:38:10 +0800
> Alan Kao wrote:
>
> > +static int __ftrace_modify_call(unsigned long hook_pos, unsigned long
> > target,
> > + bool enable)
> > +{
> > + unsigned int offset = (unsig
On Wed, 10 Jan 2018 15:38:10 +0800
Alan Kao wrote:
> +static int __ftrace_modify_call(unsigned long hook_pos, unsigned long target,
> + bool enable)
> +{
> + unsigned int offset = (unsigned int)(target - hook_pos);
> + unsigned int auipc_call = to_auipc_insn(of
On Wed, 10 Jan 2018 15:38:10 +0800
Alan Kao wrote:
> +static int ftrace_check_current_call(unsigned long hook_pos,
> + unsigned int *expected)
> +{
> + unsigned int replaced[2];
> + unsigned int nops[2] = {NOP4, NOP4};
> +
> + /* we expect nops at the
We now have dynamic ftrace with the following added items:
* ftrace_make_call, ftrace_make_nop (in kernel/ftrace.c)
The two functions turns any recorded call site of filtered functions
into a call to ftrace_caller or nops
* ftracce_update_ftrace_func (in kernel/ftrace.c)
turns the nops at f
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