On 25.07.2025 20:55, Steven Rostedt wrote: > From: Steven Rostedt <rostedt@xxxxxxxxxxx> > > Add a new API to retrieve a user space callstack called > unwind_user_faultable(). The difference between this user space stack > tracer from the current user space stack tracer is that this must be > called from faultable context as it may use routines to access user space > data that needs to be faulted in. > > It can be safely called from entering or exiting a system call as the code > can still be faulted in there. > > This code is based on work by Josh Poimboeuf's deferred unwinding code: > > Link: https://lore.kernel.org/all/6052e8487746603bdb29b65f4033e739092d9925.1737511963.git.jpoimboe@xxxxxxxxxx/ > > Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> Reviewed-by: Jens Remus <jremus@xxxxxxxxxxxxx> > --- > include/linux/sched.h | 5 +++ > include/linux/unwind_deferred.h | 24 +++++++++++ > include/linux/unwind_deferred_types.h | 9 ++++ > kernel/fork.c | 4 ++ > kernel/unwind/Makefile | 2 +- > kernel/unwind/deferred.c | 60 +++++++++++++++++++++++++++ > 6 files changed, 103 insertions(+), 1 deletion(-) > create mode 100644 include/linux/unwind_deferred.h > create mode 100644 include/linux/unwind_deferred_types.h > create mode 100644 kernel/unwind/deferred.c Regards, Jens -- Jens Remus Linux on Z Development (D3303) +49-7031-16-1128 Office jremus@xxxxxxxxxx IBM IBM Deutschland Research & Development GmbH; Vorsitzender des Aufsichtsrats: Wolfgang Wendt; Geschäftsführung: David Faller; Sitz der Gesellschaft: Böblingen; Registergericht: Amtsgericht Stuttgart, HRB 243294 IBM Data Privacy Statement: https://www.ibm.com/privacy/
