Messages in this thread | | | Subject | Re: [PATCH v6 0/2] ARM: Implement MODULE_PLT support in FTRACE | From | Florian Fainelli <> | Date | Tue, 26 Jan 2021 20:48:59 -0800 |
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Hi Alexander,
On 2/17/2020 6:09 AM, Alexander X Sverdlin wrote: > From: Alexander Sverdlin <alexander.sverdlin@nokia.com> > > FTRACE's function tracer currently doesn't always work on ARM with > MODULE_PLT option enabled. If the module is loaded too far, FTRACE's > code modifier cannot cope with introduced veneers and turns the > function tracer off globally. > > ARM64 already has a solution for the problem, refer to the following > patches: > > arm64: ftrace: emit ftrace-mod.o contents through code > arm64: module-plts: factor out PLT generation code for ftrace > arm64: ftrace: fix !CONFIG_ARM64_MODULE_PLTS kernels > arm64: ftrace: fix building without CONFIG_MODULES > arm64: ftrace: add support for far branches to dynamic ftrace > arm64: ftrace: don't validate branch via PLT in ftrace_make_nop() > > But the presented ARM variant has just a half of the footprint in terms of > the changed LoCs. It also retains the code validation-before-modification > instead of switching it off.
We have been using those patches and I was wondering what happened after this version since they did not show up upstream nor in Russell's patch tracker? Would you be willing to resubmit them?
Thanks! -- Florian
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